$mbi 2014 Q4 10-K

Concept	2014 Q4	2013 Q4	2013
Revenue	$216.0M	$447.0M	$1.209B
YoY Change	-51.68%	-38.93%	-50.35%
Cost Of Revenue			$117.0M
YoY Change			134.0%
Gross Profit			$1.092B
YoY Change			-54.21%
Gross Profit Margin			90.32%
Selling, General & Admin			$384.0M
YoY Change			-10.9%
% of Gross Profit			35.16%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization
YoY Change
% of Gross Profit
Operating Expenses	$120.0M	$96.00M	$384.0M
YoY Change	25.0%	-150.53%	-10.9%
Operating Profit			$708.0M
YoY Change			-63.77%
Interest Expense	-$61.00M	-$68.00M	$236.0M
YoY Change	-10.29%	-18.07%	-16.9%
% of Operating Profit			33.33%
Other Income/Expense, Net
YoY Change
Pretax Income	$34.00M	$294.0M	$416.0M
YoY Change	-88.44%	-64.96%	-73.97%
Income Tax	$14.00M	$162.0M	$166.0M
% Of Pretax Income	41.18%	55.1%	39.9%
Net Earnings	$20.00M	$132.0M	$250.0M
YoY Change	-84.85%	-79.25%	-79.74%
Net Earnings / Revenue	9.26%	29.53%	20.68%
Basic Earnings Per Share			$1.30
Diluted Earnings Per Share	$106.0K	$785.7K	$1.29
COMMON SHARES
Basic Shares Outstanding	193.2M shares	192.2M shares	189.1M shares
Diluted Shares Outstanding			190.3M shares

Concept	2014 Q4	2013 Q4	2013
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$782.0M	$1.258B	$1.161B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment		$8.000M	$8.000M
YoY Change		-88.41%	-88.41%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$11.82B	$12.33B	$12.33B
YoY Change	-4.15%	-12.04%	-12.04%
Other Assets	$1.830B	$1.138B	$1.138B
YoY Change	60.81%	-5.09%	-5.09%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$16.26B	$16.95B	$16.95B
YoY Change	-4.07%	-21.96%	-21.96%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$1.810B	$1.702B	$9.115B
YoY Change	6.35%	-1.73%	-20.03%
Other Long-Term Liabilities	$1.499B	$1.457B	$1.457B
YoY Change	2.88%	-56.39%	-56.39%
Total Long-Term Liabilities	$1.810B	$1.702B	$10.57B
YoY Change	6.35%	-1.73%	-28.27%
TOTAL LIABILITIES
Total Short-Term Liabilities
Total Long-Term Liabilities	$1.810B	$1.702B	$10.57B
Total Liabilities	$12.33B	$13.65B	$13.65B
YoY Change	-9.67%	-26.31%	-26.31%
SHAREHOLDERS EQUITY
Retained Earnings	$2.858B	$2.289B
YoY Change	24.86%	12.26%
Common Stock	$281.0M	$278.0M
YoY Change	1.08%	0.36%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$2.359B	$2.318B
YoY Change	1.77%	1.89%
Treasury Stock Shares	89.41M shares	85.56M shares
Shareholders Equity	$3.929B	$3.278B	$3.299B
YoY Change
Total Liabilities & Shareholders Equity	$16.28B	$16.95B	$16.95B
YoY Change	-3.95%	-21.96%	-21.96%

Concept	2014 Q4	2013 Q4	2013
OPERATING ACTIVITIES
Net Income	$20.00M	$132.0M	$250.0M
YoY Change	-84.85%	-79.25%	-79.74%
Depreciation, Depletion And Amortization
YoY Change
Cash From Operating Activities	$17.00M	$796.0M	$1.829B
YoY Change	-97.86%	-1205.56%	-278.09%
INVESTING ACTIVITIES
Capital Expenditures	-$4.000M	-$1.000M	$3.000M
YoY Change	300.0%	-50.0%	-57.14%
Acquisitions
YoY Change
Other Investing Activities	$359.0M	-$302.0M	$0.00
YoY Change	-218.87%	-127.68%	-100.0%
Cash From Investing Activities	$355.0M	-$303.0M	-$6.000M
YoY Change	-217.16%	-127.82%	-100.14%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net			$0.00
YoY Change
Debt Paid & Issued, Net			$3.000M
YoY Change			-99.44%
Cash From Financing Activities	-138.0M	-342.0M	-1.566B
YoY Change	-59.65%	-26.92%	-44.29%
NET CHANGE
Cash From Operating Activities	17.00M	796.0M	1.829B
Cash From Investing Activities	355.0M	-303.0M	-6.000M
Cash From Financing Activities	-138.0M	-342.0M	-1.566B
Net Change In Cash	234.0M	151.0M	257.0M
YoY Change	54.97%	-72.5%	-28.01%
FREE CASH FLOW
Cash From Operating Activities	$17.00M	$796.0M	$1.829B
Capital Expenditures	-$4.000M	-$1.000M	$3.000M
Free Cash Flow	$21.00M	$797.0M	$1.826B
YoY Change	-97.37%	-1238.57%	-276.6%

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2015	us-gaap	Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0182	pure
CY2014	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2013	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	4000000	USD
CY2015Q4	mbi	Approximate Percentage Of Level3 Assets At Fair Value In Total Assets Measured At Fair Value ApproximatePercentageOfLevel3AssetsAtFairValueInTotalAssetsMeasuredAtFairValue	0.19	pure
CY2013	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-1566000000	USD
CY2015	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	174000000	USD
CY2015Q4	mbi	Approximate Percentage Of Level3 Liabilities At Fair Value In Total Liabilities Measured At Fair Value ApproximatePercentageOfLevel3LiabilitiesAtFairValueInTotalLiabilitiesMeasuredAtFairValue	0.52	pure
CY2013	us-gaap	Payments For Proceeds From Derivative Instrument Investing Activities PaymentsForProceedsFromDerivativeInstrumentInvestingActivities	54000000	USD
CY2014Q4	us-gaap	Security Owned And Pledged As Collateral Fair Value SecurityOwnedAndPledgedAsCollateralFairValue	532000000	USD
CY2015	mbi	Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Other InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesOther	-37000000	USD
CY2013	us-gaap	Payments For Operating Activities PaymentsForOperatingActivities	277000000	USD
CY2014	mbi	Segment Pretax Income Loss SegmentPretaxIncomeLoss	641000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	132000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	5100000000	USD
CY2015Q4	mbi	Cash And Money Market Securities Collateral For Investment Agreements CashAndMoneyMarketSecuritiesCollateralForInvestmentAgreements	12000000	USD
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than One And Within Two Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate	162000000	USD
CY2015Q4	mbi	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Eleventh Through Fifteenth Year Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringEleventhThroughFifteenthYearFollowingBalanceSheetDate	287000000	USD
CY2014Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2015	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-81000000	USD
CY2014	mbi	Payments For Deconsolidation Of Variable Interest Entity PaymentsForDeconsolidationOfVariableInterestEntity	-18000000	USD
CY2013	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	67000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	209000000	USD
CY2015	dei	Entity Registrant Name EntityRegistrantName	MBIA INC
CY2014	us-gaap	Repayments Of Notes Payable RepaymentsOfNotesPayable	609000000	USD
CY2014Q4	mbi	Insurance Loss Recoverable InsuranceLossRecoverable	533000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	2000000	USD
CY2014	mbi	Segment Revenue SegmentRevenue	1270000000	USD
CY2013Q4	us-gaap	Assets Assets	16953000000	USD
CY2015Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Net Discount ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityNetDiscount	116000000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-26000000	USD
CY2014	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	239000000	USD
CY2015	mbi	Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange NetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange	63000000	USD
CY2014Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Loss HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss	202000000	USD
CY2014	us-gaap	Payments For Operating Activities PaymentsForOperatingActivities	238000000	USD
CY2014	us-gaap	Net Income Loss NetIncomeLoss	569000000	USD
CY2013	us-gaap	Repayments Of Other Long Term Debt RepaymentsOfOtherLongTermDebt	285000000	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-213000000	USD
CY2014	mbi	Weighted Average Contractual Maturity Period Of Securities Unrealized Loss Position WeightedAverageContractualMaturityPeriodOfSecuritiesUnrealizedLossPosition	P13Y
CY2013Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3299000000	USD
CY2014Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal	11263000000	USD
CY2014	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	2000000	USD
CY2015Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Cost SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost	6371000000	USD
CY2014Q4	us-gaap	Liabilities Liabilities	12334000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-82000000	USD
CY2015	mbi	Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses After Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesAfterTax	-2000000	USD
CY2015Q4	mbi	Senior Notes At Par Value Owned By National SeniorNotesAtParValueOwnedByNational	136000000	USD
CY2015Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	24000000	USD
CY2014	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	3000000	USD
CY2015	mbi	Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesTax	-1000000	USD
CY2014Q4	mbi	Other Liabilities And Derivative Liabilities Vie After Counterparty Netting And Embedded Reclass OtherLiabilitiesAndDerivativeLiabilitiesVieAfterCounterpartyNettingAndEmbeddedReclass	437000000	USD
CY2014	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-43000000	USD
CY2015Q4	mbi	Contract Claims On Ineligible Mortgage Loans Inception To Date Incurred Loss On Transactions ContractClaimsOnIneligibleMortgageLoansInceptionToDateIncurredLossOnTransactions	424000000	USD
CY2014Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2359000000	USD
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Third Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringThirdQuarterFollowingBalanceSheetDate	45000000	USD
CY2014Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	782000000	USD
CY2015	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	109000000	USD
CY2014Q4	us-gaap	Available For Sale Securities AvailableForSaleSecurities	6571000000	USD
CY2015	mbi	Weighted Average Contractual Maturity Period Of Securities Unrealized Loss Position WeightedAverageContractualMaturityPeriodOfSecuritiesUnrealizedLossPosition	P17Y
CY2014Q4	mbi	Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLosses	680000000	USD
CY2014Q4	us-gaap	Held To Maturity Securities Accumulated Unrecognized Holding Gain HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain	77000000	USD
CY2013	us-gaap	Proceeds From Insurance Premiums Collected ProceedsFromInsurancePremiumsCollected	185000000	USD
CY2015Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	1373000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	254000000	USD
CY2013	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	452000000	USD
CY2014	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold	174000000	USD
CY2013	mbi	Payments For Net Realized Losses On Insured Derivatives Paid PaymentsForNetRealizedLossesOnInsuredDerivativesPaid	458000000	USD
CY2014	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.76
CY2014	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	-333000000	USD
CY2014	mbi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesNetOfTax	-4000000	USD
CY2015Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	130303241	shares
CY2015	us-gaap	Insurance Recoveries InsuranceRecoveries	0	USD
CY2015Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability	797000000	USD
CY2014	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	676000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-892000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	5000000	USD
CY2014Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	373000000	USD
CY2014	us-gaap	Interest Paid Net InterestPaidNet	179000000	USD
CY2014Q4	mbi	Transactions Guaranteed On Behalf Of Various Affiliates TransactionsGuaranteedOnBehalfOfVariousAffiliates	2600000000	USD
CY2014	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	1494000000	USD
CY2015	us-gaap	Proceeds From Interest And Dividends Received ProceedsFromInterestAndDividendsReceived	353000000	USD
CY2015	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	-8000000	USD
CY2014Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Fair Value HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue	373000000	USD
CY2013	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	2000000	USD
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber	2325300	shares
CY2015Q4	mbi	Derivative Fair Value Of Derivative Asset Net Of Counterparty Netting DerivativeFairValueOfDerivativeAssetNetOfCounterpartyNetting	19000000	USD
CY2014Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	281352782	shares
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Fourth Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFourthQuarterFollowingBalanceSheetDate	44000000	USD
CY2014	mbi	Collections For Cases With Recoveries CollectionsForCasesWithRecoveries	108000000	USD
CY2014Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	2858000000	USD
CY2013	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	1000000	USD
CY2014	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	2000000	USD
CY2015Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	85000000	USD
CY2014Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	12000000	USD
CY2014	us-gaap	Revenue Other Financial Services RevenueOtherFinancialServices	616000000	USD
CY2015Q4	us-gaap	Derivative Collateral Right To Reclaim Securities DerivativeCollateralRightToReclaimSecurities	259000000	USD
CY2013	mbi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesTax	2000000	USD
CY2014	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1 FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1	P9Y2M4D
CY2015	us-gaap	Proceeds From Sale And Maturity Of Held To Maturity Securities ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities	67000000	USD
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Four And Within Five Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate	128000000	USD
CY2015Q4	mbi	Number Of Policies NumberOfPolicies	411
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice	13.466
CY2015	mbi	Premiums Earned Net Financial Guarantee Insurance Contracts And Insured Derivatives PremiumsEarnedNetFinancialGuaranteeInsuranceContractsAndInsuredDerivatives	385000000	USD
CY2015	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-260000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	172000000	USD
CY2013	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0	USD
CY2013	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-76000000	USD
CY2014Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	0	USD
CY2014Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	400000000	shares
CY2013	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3000000	USD
CY2014	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-412000000	USD
CY2015Q4	mbi	Transactions Guaranteed On Behalf Of Various Affiliates TransactionsGuaranteedOnBehalfOfVariousAffiliates	2200000000	USD
CY2013	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	0	USD
CY2015	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2013	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	3000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue	851000000	USD
CY2014	mbi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesTax	-2000000	USD
CY2015Q4	us-gaap	Participating Policies As Percentage Of Gross Insurance In Force ParticipatingPoliciesAsPercentageOfGrossInsuranceInForce	1	pure
CY2015Q4	mbi	Incentive Stock Options And Non Qualified Stock Options Granted Price At Fair Value Of Common Stock Percentage IncentiveStockOptionsAndNonQualifiedStockOptionsGrantedPriceAtFairValueOfCommonStockPercentage	1	pure
CY2015	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	289000000	USD
CY2015	mbi	Increase Decrease In Loss Adjustment Expense Recoveries IncreaseDecreaseInLossAdjustmentExpenseRecoveries	5000000	USD
CY2014	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	107000000	USD
CY2015Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Fair Value SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue	6350000000	USD
CY2015	mbi	Proceeds From Consolidation Of Variable Interest Entity ProceedsFromConsolidationOfVariableInterestEntity	7000000	USD
CY2015	us-gaap	Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax	-14000000	USD
CY2013	mbi	Premiums Earned Net Financial Guarantee Insurance Contracts And Insured Derivatives PremiumsEarnedNetFinancialGuaranteeInsuranceContractsAndInsuredDerivatives	494000000	USD
CY2015Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	4000000	USD
CY2014Q4	mbi	Held To Maturity Cumulative Other Than Temporary Impairment Of Securities HeldToMaturityCumulativeOtherThanTemporaryImpairmentOfSecurities	0	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue	2071000000	USD
CY2014Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	3950000000	USD
CY2015Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest	6247000000	USD
CY2015	mbi	Annual Compensation Maximum Pension Per Employee Amount AnnualCompensationMaximumPensionPerEmployeeAmount	1500000	USD
CY2015	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-1014000000	USD
CY2014Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding	147
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CY2015Q4	us-gaap	Assets Fair Value Disclosure Recurring AssetsFairValueDisclosureRecurring	9503000000	USD
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CY2015Q4	mbi	Lae Insurance Loss Recoverable LaeInsuranceLossRecoverable	6000000	USD
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CY2014	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	28000000	USD
CY2014	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Basic UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic	16000000	USD
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CY2015	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-50000000	USD
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CY2014	us-gaap	Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod	P7Y8M12D
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CY2014	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	1622877	shares
CY2015Q4	us-gaap	Held To Maturity Securities HeldToMaturitySecurities	2689000000	USD
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CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Two And Within Three Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate	68000000	USD
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CY2014Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1810000000	USD
CY2013Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1258000000	USD
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CY2015Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	12000000	USD
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CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	20.6883
CY2014	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	106000000	USD
CY2014	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	-902000000	USD
CY2015Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	14855000000	USD
CY2015Q4	us-gaap	Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	312000000	USD
CY2013	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	15000000	USD
CY2013	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	245000000	USD
CY2014	mbi	Payments For Net Realized Losses On Insured Derivatives Paid PaymentsForNetRealizedLossesOnInsuredDerivativesPaid	432000000	USD
CY2014	mbi	Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange NetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange	78000000	USD
CY2015	mbi	Segment Revenue SegmentRevenue	853000000	USD
CY2014	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	15000000	USD
CY2014	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	50000000	USD
CY2015Q4	mbi	Accumulated Other Comprehensive Income Loss Deferred Income Tax AccumulatedOtherComprehensiveIncomeLossDeferredIncomeTax	51000000	USD
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Second Quarter Following The Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringSecondQuarterFollowingTheBalanceSheetDate	28000000	USD
CY2014	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	15000000	USD
CY2015	mbi	Number Of Variable Interest Entities Consolidated NumberOfVariableInterestEntitiesConsolidated	1	pure
CY2015	us-gaap	Description Of New Accounting Pronouncements Not Yet Adopted DescriptionOfNewAccountingPronouncementsNotYetAdopted	<div><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;' >Recent </font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' >Accounting Developments</font><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;' > </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Revenue </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >from Contracts with Customers (Topic 606) (ASU 2014-09)</font><font style='font-family:Times New Roman;font-size:10pt;' > and </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >Deferral of the Effective Date</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >(ASU 201</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >5</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >-</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >14</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >)</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In May of 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 amends the accounting guidance for recogn</font><font style='font-family:Times New Roman;font-size:10pt;' >izing revenue for the transfer of goods or services from contracts with customers unless those contracts are within the scope of other accounting standards. ASU 2014-09 does not apply to financial guarantee insurance contracts within the scope of Topic 944</font><font style='font-family:Times New Roman;font-size:10pt;' >, “Financial Services </font><font style='font-family:Times New Roman;font-size:10pt;' >—</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >Insurance.” In August of 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers (Topic 606)</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >—</font><font style='font-family:Times New Roman;font-size:10pt;' > Deferral of the Effective Date.</font><font style='font-family:Times New Roman;font-size:10pt;' >” ASU 2015-14 defers the effective date of ASU 2014-09 to interim and annual periods beg</font><font style='font-family:Times New Roman;font-size:10pt;' >inning January 1, 2018, and is applied on a retrospective or modified retrospective basis. The adoption of ASU 2014-09 is not expected to materially impact the Company’s consolidated financial statements.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Compensation-Stock Compensation (Topic 718</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >): </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >Accoun</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >ting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (A Consensus of the FASB Emerging Issues Task Force) (ASU 2014-12)</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In June of 2014, the FASB issued ASU 2014-12,</font><font style='font-family:Times New Roman;font-size:10pt;' > “Compensation-Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period.” ASU 2014-12 requires that a performance target that affec</font><font style='font-family:Times New Roman;font-size:10pt;' >ts vesting of share-based payment awards and that could be achieved after an employee’s requisite service period be accounted for as a performance condition. ASU 2014-12 is effective for interim and annual periods beginning January 1, 2016 with early adopt</font><font style='font-family:Times New Roman;font-size:10pt;' >ion permitted, and is applied on a prospective basis or retrospective basis. The adoption of ASU 2014-12 is not expected to materially impact the Company’s consolidated financial statements.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Consolidation (Topic 810):</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >Measuring the Financial Assets and the</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > Financial Liabilities of a Consolidated Collateralized Financing Entity (ASU 2014-</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >13</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >) </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In August of 2014, the FASB issued ASU 2014-13, “Consolidation (Topic 810)</font><font style='font-family:Times New Roman;font-size:10pt;' >: </font><font style='font-family:Times New Roman;font-size:10pt;' >Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralize</font><font style='font-family:Times New Roman;font-size:10pt;' >d Financing Entity.”</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >ASU 2014-13 applies to a consolidated collateralized financing entity defined as a consolidated VIE that holds financial assets and issues beneficial interests in those financial assets that are classified as financial liabilities. </font><font style='font-family:Times New Roman;font-size:10pt;' >The</font><font style='font-family:Times New Roman;font-size:10pt;' > Company</font><font style='font-family:Times New Roman;font-size:10pt;' > may elect to measure the financial assets and the financial liabilities of a consolidated collateralized financing entity using a measurement alternative provided in ASU 2014-</font><font style='font-family:Times New Roman;font-size:10pt;' >13</font><font style='font-family:Times New Roman;font-size:10pt;' >. The measurement alternative requires both the financial assets and t</font><font style='font-family:Times New Roman;font-size:10pt;' >he financial liabilities of the consolidated collateralized financing entity to be measured using the more observable of the fair value of the financial assets and the fair value of the financial liabilities with the changes in fair value recognized to ear</font><font style='font-family:Times New Roman;font-size:10pt;' >nings. Upon adoption, a reporting entity may apply the measurement alternative to existing consolidated collateralized financing entities. ASU 2014-</font><font style='font-family:Times New Roman;font-size:10pt;' >13</font><font style='font-family:Times New Roman;font-size:10pt;' > is effective for interim and annual periods beginning January 1, 2016 with early adoption permitted. The adoption of ASU 2014-</font><font style='font-family:Times New Roman;font-size:10pt;' >13</font><font style='font-family:Times New Roman;font-size:10pt;' > is not expected to materially impact the Company’s consolidated financial statements.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Presentation of Financial Statements</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >—</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >Goi</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >ng Concern (Subtopic 205-40)</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >: </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >(ASU 2014-</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >15</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >)</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In August of 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements-Going Concern (Subtopic 205-40): Disclosu</font><font style='font-family:Times New Roman;font-size:10pt;' >re of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” ASU 2014-15 requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern, and to</font><font style='font-family:Times New Roman;font-size:10pt;' > provide certain disclosures when it is probable that the entity will be unable to meet its obligations as they become due within one year after the date that the financial statements are issued. ASU 2014-15 is effective for the annual period end</font><font style='font-family:Times New Roman;font-size:10pt;' >ing</font><font style='font-family:Times New Roman;font-size:10pt;' > Decemb</font><font style='font-family:Times New Roman;font-size:10pt;' >er 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. </font><font style='font-family:Times New Roman;font-size:10pt;' >The adoption of ASU 2014-15 is not expected to materially impact the Company’s consolidated financial statements.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:13.8pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Interest-Imputation of Interest (Subtopic </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >835-30)</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >: </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03)</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In April of 20</font><font style='font-family:Times New Roman;font-size:10pt;' >15, the FASB issued ASU 2015-03</font><font style='font-family:Times New Roman;font-size:10pt;' >, “Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.” ASU 2015-03 requires debt i</font><font style='font-family:Times New Roman;font-size:10pt;' >ssuance costs related to a debt liability measured at amortized cost to be reported in the balance sheet as a direct deduction from the face amount of the debt liability. ASU 2015-03 is e</font><font style='font-family:Times New Roman;font-size:10pt;' >ffective for interim and annual </font><font style='font-family:Times New Roman;font-size:10pt;' >periods beginning January 1, 2016 wit</font><font style='font-family:Times New Roman;font-size:10pt;' >h early adoption permitted, and is applied on a retrospective basis. The adoption of ASU 2015-03 is not expected to materially impact the Company’s consolidated financial statements.</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:13.8pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Financial Instruments-Overall (Subtopic 825-10): Recognition and Measure</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >ment of Financial Assets and Financial Liabilities (ASU 2016-01)</font></p><p style='text-align:left;margin-top:4.5pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In January of 2016, the FASB issued ASU 2016-01, “Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01 </font><font style='font-family:Times New Roman;font-size:10pt;' >requires certain equity investments other than those accounted for under the equity method of accounting or result in consolidation of the investee to be measured at fair value with changes in fair value recognized in net income, and permits an entity to m</font><font style='font-family:Times New Roman;font-size:10pt;' >easure equity investments that do not have readily determinable fair values at cost less any impairment plus or minus adjustments for certain changes in observable prices. An entity is also required to evaluate the need for a valuation allowance on a defer</font><font style='font-family:Times New Roman;font-size:10pt;' >red tax asset related to </font><font style='font-family:Times New Roman;font-size:10pt;' >AFS</font><font style='font-family:Times New Roman;font-size:10pt;' > debt securities in combination with the entity’s other deferred tax assets. ASU 2016-01 requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability tha</font><font style='font-family:Times New Roman;font-size:10pt;' >t results from a change in the instrument-specific credit risk for financial liabilities that the entity has elected to measure at fair value in accordance with the fair value option for financial instruments. ASU 2016-01 is effective for interim and annua</font><font style='font-family:Times New Roman;font-size:10pt;' >l periods beginning January 1, 2018, and is applied on a modified retrospective basis. Early adoption is not permitted with the exception of early application of the guidance that requires separate presentation in other comprehensive income of the change i</font><font style='font-family:Times New Roman;font-size:10pt;' >n the instrument-specific credit risk for financial liabilities measured at fair value in accordance with the fair value option is permitted as of the beginning of the fiscal year of adoption</font><font style='font-family:Times New Roman;font-size:10pt;' > of the standard</font><font style='font-family:Times New Roman;font-size:10pt;' >. The Company is evaluating the impact of adoptin</font><font style='font-family:Times New Roman;font-size:10pt;' >g ASU 2016-01.</font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Leases (Topic 842) (ASU 2016-02)</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >In February of 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)” that amends the accounting guidance for leasing transactions. ASU 2016-02 requires a lessee to classify lease contracts as finance or operating leases, and to recognize assets and liabilities for the rights and obligations created by leasing transactions with lease terms more than twelve months. ASU 2016-02 substantially retains the criteria for classifying leasing transactions as finance or operating leases. For finance leases, a lessee recognizes a right-of-use asset and a lease liability initially measured at the present value of the lease payments, and recognizes interest expense on the lease liability separately from the amortization of the right-of-use asset. For operating leases, a lessee recognizes a right-of-use asset and a lease liability initially measured at the present value of the lease payments, and recognizes lease expense on a straight-line basis. ASU 2016-02 is effective for interim and </font><font style='font-family:Times New Roman;font-size:10pt;' >annual periods beginning January 1, 2019 with early adoption permitted, and is</font><font style='font-family:Times New Roman;font-size:10pt;' > applied on a modified retrospective basis. The Company is evaluating the impact of adopting ASU 2016-02.</font></p><p style='text-align:left;line-height:12pt;' ></p></div>
CY2015Q4	mbi	Derivative Liability Counterparty Netting DerivativeLiabilityCounterpartyNetting	1000000	USD
CY2015Q4	us-gaap	Long Term Debt Noncurrent LongTermDebtNoncurrent	1908000000	USD
CY2015Q4	mbi	Other Liabilities And Derivative Liabilities Vie After Counterparty Netting And Embedded Reclass OtherLiabilitiesAndDerivativeLiabilitiesVieAfterCounterpartyNettingAndEmbeddedReclass	359000000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	757000000	USD
CY2015Q4	mbi	Insurance Loss Recoverable InsuranceLossRecoverable	577000000	USD
CY2014	mbi	Increase Decrease In Other Net Realized Gains Losses IncreaseDecreaseInOtherNetRealizedGainsLosses	-25000000	USD
CY2015	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.06
CY2014	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	15000000	USD
CY2015	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	107000000	USD
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than10 And Within15 Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan10AndWithin15YearsFromBalanceSheetDate	175000000	USD
CY2014	us-gaap	Premiums Earned Net PremiumsEarnedNet	397000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss	147000000	USD
CY2015Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	3038000000	USD
CY2015	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	164869788	shares
CY2015Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	36000000	USD
CY2015Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-61000000	USD
CY2014	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	144000000	USD
CY2014	us-gaap	Increase Decrease In Loss And Loss Adjustment Expense Reserve IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve	133000000	USD
CY2014	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	641000000	USD
CY2015	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-371000000	USD
CY2014	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	66000000	USD
CY2014Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability	850000000	USD
CY2015	mbi	Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Change In Discount Rate InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesChangeInDiscountRate	-1000000	USD
CY2015Q4	us-gaap	Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	172000000	USD
CY2014	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	812000000	USD
CY2015	us-gaap	Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod	P7Y4M24D
CY2014	mbi	Transfers Into Level Three TransfersIntoLevelThree	240000000	USD
CY2014Q4	mbi	Available For Sale Cumulative Other Than Temporary Impairment Of Securities AvailableForSaleCumulativeOtherThanTemporaryImpairmentOfSecurities	90000000	USD
CY2013	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	122000000	USD
CY2015	mbi	Unvested Restricted Stock And Units That Receive Nonforfeitable Dividends Or Dividend Equivalents That Have Met Service Condition UnvestedRestrictedStockAndUnitsThatReceiveNonforfeitableDividendsOrDividendEquivalentsThatHaveMetServiceCondition	617909	shares
CY2013	mbi	Proceeds From Sales Maturities Prepayments And Calls Of Other Investments ProceedsFromSalesMaturitiesPrepaymentsAndCallsOfOtherInvestments	0	USD
CY2015Q4	us-gaap	Operating Loss Carryforwards OperatingLossCarryforwards	2800000000	USD
CY2013	us-gaap	Premiums Written Net PremiumsWrittenNet	-41000000	USD
CY2015Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	6.3703
CY2014	mbi	Realized Gains Losses And Other Settlements On Insured Derivatives Total RealizedGainsLossesAndOtherSettlementsOnInsuredDerivativesTotal	-30000000	USD
CY2015	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-525000000	USD
CY2015Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	522000000	USD
CY2014Q4	us-gaap	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue	1220000000	USD
CY2015	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.06
CY2014	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax	-4000000	USD
CY2015Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	5400000000	USD
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Two And Within Three Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate	149000000	USD
CY2013	mbi	Segment Expense SegmentExpense	793000000	USD
CY2015	us-gaap	Increase Decrease In Deferred Policy Acquisition Costs IncreaseDecreaseInDeferredPolicyAcquisitionCosts	-49000000	USD
CY2015	us-gaap	Premiums Earned Net PremiumsEarnedNet	372000000	USD
CY2015	mbi	Transfers Into Level Two TransfersIntoLevelTwo	126000000	USD
CY2014Q4	us-gaap	Liabilities Fair Value Disclosure Recurring LiabilitiesFairValueDisclosureRecurring	3463000000	USD
CY2015	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	11000000	USD
CY2014Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue	167000000	USD
CY2013	mbi	Proceeds From Reinsurance And Recoveries ProceedsFromReinsuranceAndRecoveries	2621000000	USD
CY2014	mbi	Expense From Transactions With Other Operating Segments Of Same Entity ExpenseFromTransactionsWithOtherOperatingSegmentsOfSameEntity	0	USD
CY2015	us-gaap	Revenues Revenues	853000000	USD
CY2014Q4	us-gaap	Derivative Assets Liabilities At Fair Value Net DerivativeAssetsLiabilitiesAtFairValueNet	244000000	USD
CY2014	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	13000000	USD
CY2013	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	2397000000	USD
CY2015Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	26000000	USD
CY2013	us-gaap	Fees And Commissions Other FeesAndCommissionsOther	2000000	USD
CY2015	us-gaap	Nature Of Operations NatureOfOperations	<div><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;margin-left:0pt;' >Note 1: Business Developments and Risks and Uncertainties</font></p><p style='text-align:left;margin-top:13pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;' >Summary</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >MBIA Inc., together with its consolidated subsidiaries, (collectively, “MBIA” or the “Company”) operates one of the largest financial guarantee insurance businesses in the industry. MBIA manages three operating segments: 1) United </font><font style='font-family:Times New Roman;font-size:10pt;' >States (“U.S.”) public finance insurance; 2) international and structured finance insurance; and 3) corporate.</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >The Company’s U.S. public finance insurance business is primarily operated through National Public Finance Guarantee Corporation (“National”) and</font><font style='font-family:Times New Roman;font-size:10pt;' > its international and structured finance insurance business is primarily operated through MBIA Insurance Corporation and its subsidiaries (“MBIA Corp.”). Unless otherwise indicated or the context otherwise requires, references to “MBIA Corp.” are to MBIA </font><font style='font-family:Times New Roman;font-size:10pt;' >Insurance Corporation, together with its subsidiaries, MBIA UK Insurance Limited (“MBIA UK”) and MBIA Mexico S.A. de </font><font style='font-family:Times New Roman;font-size:10pt;' >C.V</font><font style='font-family:Times New Roman;font-size:10pt;' > (“MBIA Mexico”). </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Prior to 2015, MBIA managed two other operating segments, advisory services and conduit. The advisory services segme</font><font style='font-family:Times New Roman;font-size:10pt;' >nt was primarily operated through Cutwater Holdings, LLC and its subsidiaries (“Cutwater”). Effective on January 1, 2015, the Company exited its advisory services business through the sale of Cutwater. During the second quarter of 2014, the Company dissolv</font><font style='font-family:Times New Roman;font-size:10pt;' >ed its conduit segment through the liquidation of Meridian Funding Company, LLC (“Meridian”). </font><font style='font-family:Times New Roman;font-size:10pt;' >Refer to “</font><font style='font-family:Times New Roman;font-size:10pt;' >Note 12: Business Segments</font><font style='font-family:Times New Roman;font-size:10pt;' >” for further information about the Company’s operating segments.</font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;' >Business Developments</font></p><p style='text-align:left;margin-top:4.5pt;margin-bottom:0pt;line-height:13.8pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >National Ratings and New Business Opportunities</font></p><p style='text-align:left;margin-top:4.5pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Natio</font><font style='font-family:Times New Roman;font-size:10pt;' >nal’s ability to write new business and compete with other financial guarantors is largely dependent on the financial strength ratings assigned to National by the </font><font style='font-family:Times New Roman;font-size:10pt;' >rating agencies. As of </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;' >, the </font><font style='font-family:Times New Roman;font-size:10pt;' >rating agencies affirmed the followi</font><font style='font-family:Times New Roman;font-size:10pt;' >ng ratings of National: </font><font style='font-family:Times New Roman;font-size:10pt;' >AA+ with a stable outlook by Kroll Bond Rating Agency; AA</font><font style='font-family:Times New Roman;font-size:10pt;' >- with a stable outlook</font><font style='font-family:Times New Roman;font-size:10pt;' > by </font><font style='font-family:Times New Roman;font-size:10pt;' >Standard & Poor’s Financial Services LLC (“S&P”)</font><font style='font-family:Times New Roman;font-size:10pt;' >; and A3 with a negative outlook by </font><font style='font-family:Times New Roman;font-size:10pt;' >Moody’s Investors Service, Inc. (“Moody’s”)</font><font style='font-family:Times New Roman;font-size:10pt;' >. </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >National seeks to </font><font style='font-family:Times New Roman;font-size:10pt;' >generate shareholder value through appropriate risk adjusted pricing; however, current market conditions and the competitive landscape may limit National’s new business opportunities and its abilities to price and underwrite risk with attractive returns. R</font><font style='font-family:Times New Roman;font-size:10pt;' >efer to “Risks and Uncertainties” below for a discussion of business risks related to National’s insured portfolio.</font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Sale of MBIA Inc. Common Stock</font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >During the </font><font style='font-family:Times New Roman;font-size:10pt;' >year ended</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;' >, certain investment funds affiliated with Warburg </font><font style='font-family:Times New Roman;font-size:10pt;' >Pincus</font><font style='font-family:Times New Roman;font-size:10pt;' > LLC (</font><font style='font-family:Times New Roman;font-size:10pt;' >“Warburg”) sold all of their </font><font style='font-family:Times New Roman;font-size:10pt;' >45.7</font><font style='font-family:Times New Roman;font-size:10pt;' > million shares of MBIA Inc. common stock. At the time of each sale, Warburg was the largest holder of the Company’s common stock. Warburg received all of the net proceeds from this offering. In connection with the sales, N</font><font style='font-family:Times New Roman;font-size:10pt;' >ational and the Company repurchased </font><font style='font-family:Times New Roman;font-size:10pt;' >8 </font><font style='font-family:Times New Roman;font-size:10pt;' >million shares and 7.6 million shares, respectively.</font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Held For Sale Classifications</font></p><p style='text-align:left;margin-top:4.5pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;text-decoration:underline;margin-left:0pt;' >Armonk, New York Facility</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >During the </font><font style='font-family:Times New Roman;font-size:10pt;' >year ended</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;' >, the Company sold</font><font style='font-family:Times New Roman;font-size:10pt;' > its Armonk, New York facility and recorded an impairment charge of $</font><font style='font-family:Times New Roman;font-size:10pt;' >4</font><font style='font-family:Times New Roman;font-size:10pt;' > million to adjust the carrying amount to the sale price less costs to sell. The impairment charge was reflected in the results of the Company’s U.S. public finance insurance segment and</font><font style='font-family:Times New Roman;font-size:10pt;' > included in “Other net realized gains (losses)” on the Company’s consolidated statements of operations. </font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;text-decoration:underline;margin-left:0pt;' >Cutwater</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >As a result of the agreement to sell Cutwater, the assets and liabilities of Cutwater were classified as held for sale as of December 31, </font><font style='font-family:Times New Roman;font-size:10pt;' >2014 and presented within “Assets held for sale” and “Liabilities held for sale” on the Company’s consolidated balance sheet and measured at the lower of its carrying value or fair value less costs to sell. The Company completed this sale effective </font><font style='font-family:Times New Roman;font-size:10pt;' >January</font><font style='font-family:Times New Roman;font-size:10pt;' > 1, 2015, and recorded a gain of approximately $</font><font style='font-family:Times New Roman;font-size:10pt;' >24</font><font style='font-family:Times New Roman;font-size:10pt;' > million. This gain was reflected in the results of the Company’s corporate segment and included in </font><font style='font-family:Times New Roman;font-size:10pt;' >“Other net realized gains (losses)” on the Company’s consolidated statements of operations.</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' > </font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;text-decoration:underline;margin-left:0pt;' >Assets and L</font><font style='font-family:Times New Roman;font-size:10pt;text-decoration:underline;' >iabilities Held for Sale by Major Category</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >As of December 31, 2015, there are no assets and liabilities held for sale on the Company’s consolidated balance sheet. The following table summarizes the components of assets and liabilities held for sale as of </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2014</font><font style='font-family:Times New Roman;font-size:10pt;' >:</font></p></div><p style='line-height:20pt;' /><div><table style='border-collapse:collapse;' ><tr style='height:9.75pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ></td><td style='width:15pt;text-align:center;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:left;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:left;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:center;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:9.75pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td colspan='3' rowspan='1' style='width:258.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:left;border-color:Black;min-width:258.75pt;' ><font style='font-family:Times New Roman;font-size:8.5pt;font-weight:bold;color:#000000;' >In millions</font></td><td style='width:15pt;text-align:center;border-color:Black;min-width:15pt;' ></td><td colspan='2' rowspan='1' style='width:105pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;border-color:Black;min-width:105pt;' ><font style='font-family:Times New Roman;font-size:8.5pt;font-weight:bold;color:#000000;' >December 31, 2014</font></td><td style='width:49.5pt;text-align:center;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td colspan='3' rowspan='1' style='width:258.75pt;border-top-style:solid;border-top-width:1;text-align:left;border-color:Black;min-width:258.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' >Assets</font></td><td style='width:15pt;text-align:left;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:solid;border-top-width:1;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;border-top-style:solid;border-top-width:1;text-align:left;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Investments carried at fair value</font></td><td style='width:15pt;text-align:left;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >$</font></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >6</font></td><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Cash and cash equivalents</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:left;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >15</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Facility</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:left;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >26</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Other assets</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >4</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Assets of consolidated variable interest entities:</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Cash</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >40</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Loans receivable at fair value</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >711</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' > Total assets held for sale</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:center;border-color:Black;min-width:7.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >$</font></td><td style='width:97.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >802</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:5.25pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:double;border-top-width:3;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;border-top-style:double;border-top-width:3;text-align:right;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td colspan='3' rowspan='1' style='width:258.75pt;text-align:left;border-color:Black;min-width:258.75pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' >Liabilities</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Other liabilities </font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >$</font></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >18</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Liabilities of consolidated variable interest entities:</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:left;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Variable interest entity notes</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >431</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >Payable for loans purchased</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >323</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;color:#000000;' > Total liabilities held for sale</font></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:center;border-color:Black;min-width:7.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >$</font></td><td style='width:97.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:right;border-color:Black;min-width:97.5pt;' ><font style='font-family:Times New Roman;font-size:10pt;color:#000000;' >772</font></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr></table></div><p style='line-height:20pt;' /><div><p style='text-align:left;margin-top:9pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-weight:bold;font-style:italic;margin-left:0pt;' >Risks and Uncertainties</font></p><p style='text-align:left;margin-top:4.5pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The Company’s financial statements include estimates and assumptions</font><font style='font-family:Times New Roman;font-size:10pt;' > that affect the reported amounts of assets, liabilities, revenues and expenses. The outcome of certain significant risks and uncertainties could cause the Company to revise its estimates and assumptions or could cause actual results to differ from the Com</font><font style='font-family:Times New Roman;font-size:10pt;' >pany’s estimates. The discussion below highlights the significant risks and uncertainties that could have a material effect on the Company’s financial statements and business objectives in future periods. </font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >U.S. Public Finance Market Conditions</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >National’s </font><font style='font-family:Times New Roman;font-size:10pt;' >insured portfolio continued to perform satisfactorily against a backdrop of strengthening domestic economic activity. While a stable or growing economy will generally benefit tax revenues and fees charged for essential municipal services which secure Natio</font><font style='font-family:Times New Roman;font-size:10pt;' >nal’s insured bond portfolio, some state and local governments and territory obligors National insures remain under financial and budgetary stress. This could lead to an increase in defaults by such entities on the payment of their obligations and losses o</font><font style='font-family:Times New Roman;font-size:10pt;' >r impairments on a greater number of the Company’s insured transactions. The Company monitors and analyzes these situations and other stressed credits closely, and the overall extent and duration of this stress is uncertain. </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Puerto Rico is experiencing f</font><font style='font-family:Times New Roman;font-size:10pt;' >iscal stress and constrained liquidity due to, among other things, Puerto Rico’s structural budget imbalance, limited access to the capital markets, a stagnating local economy, net migration of people out of Puerto Rico and a high debt burden</font><font style='font-family:Times New Roman;font-size:10pt;' >. Although Pue</font><font style='font-family:Times New Roman;font-size:10pt;' >rto Rico has tried to address its significant financial challenges through various fiscal policies and by the passage of a balanced general fund budget, it continues to experience significant fiscal stress. </font><font style='font-family:Times New Roman;font-size:10pt;' >The Company </font><font style='font-family:Times New Roman;font-size:10pt;' >continue</font><font style='font-family:Times New Roman;font-size:10pt;' >s</font><font style='font-family:Times New Roman;font-size:10pt;' > to believe, based on </font><font style='font-family:Times New Roman;font-size:10pt;' >its</font><font style='font-family:Times New Roman;font-size:10pt;' > an</font><font style='font-family:Times New Roman;font-size:10pt;' >alysis of Puerto Rico’s fiscal and structural circumstances, the details of </font><font style='font-family:Times New Roman;font-size:10pt;' >its</font><font style='font-family:Times New Roman;font-size:10pt;' > insured exposures, and </font><font style='font-family:Times New Roman;font-size:10pt;' >its </font><font style='font-family:Times New Roman;font-size:10pt;' >legal and contractual rights, that all of </font><font style='font-family:Times New Roman;font-size:10pt;' >National’s </font><font style='font-family:Times New Roman;font-size:10pt;' >insured Puerto Rico related debt will ultimately be substantially repaid. </font><font style='font-family:Times New Roman;font-size:10pt;' >In addition, in Decemb</font><font style='font-family:Times New Roman;font-size:10pt;' >er of 2015, National and other stakeholders entered into a restructuring support agreement with Puerto Rico Electric Power Authority (“</font><font style='font-family:Times New Roman;font-size:10pt;' >PREPA</font><font style='font-family:Times New Roman;font-size:10pt;' >”) addressing, among other things, the treatment of approximately $</font><font style='font-family:Times New Roman;font-size:10pt;' >8.1</font><font style='font-family:Times New Roman;font-size:10pt;' > billion of outstanding </font><font style='font-family:Times New Roman;font-size:10pt;' >PREPA</font><font style='font-family:Times New Roman;font-size:10pt;' > bonds, including</font><font style='font-family:Times New Roman;font-size:10pt;' > approximately $</font><font style='font-family:Times New Roman;font-size:10pt;' >1.4</font><font style='font-family:Times New Roman;font-size:10pt;' > billion of </font><font style='font-family:Times New Roman;font-size:10pt;' >PREPA</font><font style='font-family:Times New Roman;font-size:10pt;' > bonds insured by National.</font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > Corp. Recoveri</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >es</font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' > </font><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;' >and Insured Portfolio</font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp.’s primary focus is the collection of excess spread and put-back recoveries and loss mitigation, primarily through remediation of stressed</font><font style='font-family:Times New Roman;font-size:10pt;' > credits including through commutations of insurance policies. </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:0pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >The amount and timing of projected collections from excess spread from second-lien residential mortgage-backed securities (“RMBS”) and the put-back recoverable from Credit Suisse Securities (U</font><font style='font-family:Times New Roman;font-size:10pt;' >SA) LLC, </font><font style='font-family:Times New Roman;font-size:10pt;' >DLJ</font><font style='font-family:Times New Roman;font-size:10pt;' > Mortgage Capital, Inc., and Select Portfolio Servicing Inc. (collectively, “Credit Suisse”) are uncertain. </font><font style='font-family:Times New Roman;font-size:10pt;' >Refer to “</font><font style='font-family:Times New Roman;font-size:10pt;' >Note 6: Loss and Loss Adjustment Expense Reserves</font><font style='font-family:Times New Roman;font-size:10pt;' >” for information about </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp.’s loss reserves and recoveries. </font></p><p style='text-align:left;margin-top:9pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >Further, the remaining insured portfolio, aside</font><font style='font-family:Times New Roman;font-size:10pt;' > from these exposures, could deteriorate and result in additional significant loss reserves and claim payments. </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp.’s ability to meet its obligations is limited by available liquidity and its ability to </font><font style='font-family:Times New Roman;font-size:10pt;' >secure liquidity </font><font style='font-family:Times New Roman;font-size:10pt;' >through financing transaction</font><font style='font-family:Times New Roman;font-size:10pt;' >s, therefore, there can be no assurance that </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. will be successful in generating sufficient cash to meet its obligations. In particular, </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. </font><font style='font-family:Times New Roman;font-size:10pt;' >insures </font><font style='font-family:Times New Roman;font-size:10pt;' >$</font><font style='font-family:Times New Roman;font-size:10pt;' >77</font><font style='font-family:Times New Roman;font-size:10pt;' >6</font><font style='font-family:Times New Roman;font-size:10pt;' > million of gross par outstanding</font><font style='font-family:Times New Roman;font-size:10pt;' >, as of February of 2016, of notes issued</font><font style='font-family:Times New Roman;font-size:10pt;' > by Zohar II 2005-1, a </font><font style='font-family:Times New Roman;font-size:10pt;' >high yield </font><font style='font-family:Times New Roman;font-size:10pt;' >corporate collateralized debt obligations (“</font><font style='font-family:Times New Roman;font-size:10pt;' >CDO</font><font style='font-family:Times New Roman;font-size:10pt;' >”), which matures </font><font style='font-family:Times New Roman;font-size:10pt;' >in January of 2017. If cash flows </font><font style='font-family:Times New Roman;font-size:10pt;' >generated by </font><font style='font-family:Times New Roman;font-size:10pt;' >this high yield </font><font style='font-family:Times New Roman;font-size:10pt;' >corporate </font><font style='font-family:Times New Roman;font-size:10pt;' >CDO</font><font style='font-family:Times New Roman;font-size:10pt;' > are insufficient</font><font style='font-family:Times New Roman;font-size:10pt;' > to pay the insured amount in full</font><font style='font-family:Times New Roman;font-size:10pt;' >, </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. will be called up</font><font style='font-family:Times New Roman;font-size:10pt;' >on to make the </font><font style='font-family:Times New Roman;font-size:10pt;' >unpaid insured amount </font><font style='font-family:Times New Roman;font-size:10pt;' >at maturity. </font><font style='font-family:Times New Roman;font-size:10pt;' >Unless a substantial amount of the insured exposure is paid at maturity, or if </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. is unsuccessful at reaching </font><font style='font-family:Times New Roman;font-size:10pt;' >a</font><font style='font-family:Times New Roman;font-size:10pt;' >n agreed upo</font><font style='font-family:Times New Roman;font-size:10pt;' >n restructuring</font><font style='font-family:Times New Roman;font-size:10pt;' > of the insured exposure</font><font style='font-family:Times New Roman;font-size:10pt;' >, </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. may ultimately have ins</font><font style='font-family:Times New Roman;font-size:10pt;' >ufficient resources to continue to pay claims</font><font style='font-family:Times New Roman;font-size:10pt;' >. Such failure could </font><font style='font-family:Times New Roman;font-size:10pt;' >cause the New York State Department of Financial Services (“NYSDFS”) to put </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Insurance Corporation, exclusive of </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > UK and </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Mexico, into a rehabilitation or liquidation proceeding</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >or to order </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. to cease paying any claims under its policies</font><font style='font-family:Times New Roman;font-size:10pt;' >. Given the separation of </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. and </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. as distinct legal entities, the absence of any material intercompany lending agreements or cross defaults between the entities, and the l</font><font style='font-family:Times New Roman;font-size:10pt;' >ack of reliance by </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. on </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. for the receipt of dividends, the Company does </font><font style='font-family:Times New Roman;font-size:10pt;' >not believe that a rehabilitation or liquidation proceeding of </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Insurance Corporation by </font><font style='font-family:Times New Roman;font-size:10pt;' >the </font><font style='font-family:Times New Roman;font-size:10pt;' >NYSDFS would have any significant long-term liquidity impact on </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >Inc. or result in a liquidation or similar proceeding of </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > UK or </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Mexico.</font><font style='font-family:Times New Roman;font-size:10pt;' > Such a proceeding could have material adverse consequences for </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp., including the termination of insured credit default swap (“CDS”) contracts for which counterparties </font><font style='font-family:Times New Roman;font-size:10pt;' >may assert market-based claims, the acceleration of debt obligations issued by affiliates and insured by </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp., the loss of control of </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Insurance Corporation to a rehabilitator or liquidator, and unplanned costs.</font><font style='font-family:Times New Roman;font-size:10pt;' > </font></p><p style='text-align:left;margin-top:9pt;margin-bottom:4.5pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;font-style:italic;margin-left:0pt;' >Corporate Liquidity </font></p><p style='text-align:left;margin-top:0pt;margin-bottom:9pt;line-height:12pt;' ><font style='font-family:Times New Roman;font-size:10pt;margin-left:0pt;' >As of </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;' > and </font><font style='font-family:Times New Roman;font-size:10pt;' >2014</font><font style='font-family:Times New Roman;font-size:10pt;' >, the liquidity position of </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. was </font><font style='font-family:Times New Roman;font-size:10pt;' >$</font><font style='font-family:Times New Roman;font-size:10pt;' >416</font><font style='font-family:Times New Roman;font-size:10pt;' > million</font><font style='font-family:Times New Roman;font-size:10pt;' > and $</font><font style='font-family:Times New Roman;font-size:10pt;' >498</font><font style='font-family:Times New Roman;font-size:10pt;' > million, respectively. The term “liquidity position” refers to cash and liquid assets available for general liquidity purposes. During the </font><font style='font-family:Times New Roman;font-size:10pt;' >year ended</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;' >, </font><font style='font-family:Times New Roman;font-size:10pt;' >$</font><font style='font-family:Times New Roman;font-size:10pt;' >228</font><font style='font-family:Times New Roman;font-size:10pt;' > million was released to </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. </font><font style='font-family:Times New Roman;font-size:10pt;' >under the </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > group’s tax sharing agreement (the “Tax Escrow Account”)</font><font style='font-family:Times New Roman;font-size:10pt;' > and National declared and paid a dividend of $</font><font style='font-family:Times New Roman;font-size:10pt;' >114</font><font style='font-family:Times New Roman;font-size:10pt;' > million to its ultimate parent, </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. Su</font><font style='font-family:Times New Roman;font-size:10pt;' >bsequent to </font><font style='font-family:Times New Roman;font-size:10pt;' >December 31,</font><font style='font-family:Times New Roman;font-size:10pt;' > </font><font style='font-family:Times New Roman;font-size:10pt;' >2015</font><font style='font-family:Times New Roman;font-size:10pt;' >, an </font><font style='font-family:Times New Roman;font-size:10pt;' >additional $</font><font style='font-family:Times New Roman;font-size:10pt;' >1</font><font style='font-family:Times New Roman;font-size:10pt;' >05</font><font style='font-family:Times New Roman;font-size:10pt;' > million</font><font style='font-family:Times New Roman;font-size:10pt;' > was released to </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. from the Tax Escrow Account. Based on the Company’s projections of National’s dividends, payments into the Tax Escrow Account, and other cash inflows, the Company expect</font><font style='font-family:Times New Roman;font-size:10pt;' >s that </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. will have sufficient cash to satisfy its debt service and general corporate needs. However, </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. continues to have liquidity risk which could be triggered by deterioration in the performance of invested assets, interruption of or redu</font><font style='font-family:Times New Roman;font-size:10pt;' >ction in dividends or tax payments received from operating subsidiaries, impaired access to the capital markets, as well as other factors which cannot be anticipated at this time. Furthermore, failure by </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Inc. to settle liabilities that are also insure</font><font style='font-family:Times New Roman;font-size:10pt;' >d by </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp. could result in claims on </font><font style='font-family:Times New Roman;font-size:10pt;' >MBIA</font><font style='font-family:Times New Roman;font-size:10pt;' > Corp.</font></p></div>
CY2015	us-gaap	Available For Sale Securities Gross Realized Losses AvailableForSaleSecuritiesGrossRealizedLosses	16000000	USD
CY2015Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	281833618	shares
CY2015Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	10000000	shares
CY2013	us-gaap	Premiums Earned Net PremiumsEarnedNet	457000000	USD
CY2013	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations	11000000	USD
CY2015	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	129000000	USD
CY2013	mbi	Gross Premium Earned Financial Guarantee Insurance Contracts GrossPremiumEarnedFinancialGuaranteeInsuranceContracts	467000000	USD
CY2015	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	303000000	USD
CY2014Q4	us-gaap	Participating Policies As Percentage Of Gross Insurance In Force ParticipatingPoliciesAsPercentageOfGrossInsuranceInForce	1	pure
CY2014	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	526000000	USD
CY2014	mbi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesBeforeTax	-6000000	USD
CY2015	mbi	Proceeds From Sales Maturities And Paydowns Of Fair Value And Trading Securities ProceedsFromSalesMaturitiesAndPaydownsOfFairValueAndTradingSecurities	551000000	USD
CY2013	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	1726000000	USD
CY2015	us-gaap	Payments For Operating Activities PaymentsForOperatingActivities	130000000	USD
CY2013	us-gaap	Proceeds From Insurance Settlement Operating Activities ProceedsFromInsuranceSettlementOperatingActivities	0	USD
CY2015	mbi	Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesBeforeTax	-3000000	USD
CY2014Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice	10.9888
CY2014	us-gaap	Revenues Revenues	1270000000	USD
CY2013	mbi	Proceeds From Sales Maturities And Paydowns Of Fair Value And Trading Securities ProceedsFromSalesMaturitiesAndPaydownsOfFairValueAndTradingSecurities	595000000	USD
CY2014Q4	mbi	Preferred Stock Of Subsidiary And Noncontrolling Interest Value PreferredStockOfSubsidiaryAndNoncontrollingInterestValue	21000000	USD
CY2014	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-27000000	USD
CY2014	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	171000000	USD
CY2015	us-gaap	Fair Value Adjustment Of Warrants FairValueAdjustmentOfWarrants	0	USD
CY2015	mbi	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesNetOfTax	-3000000	USD
CY2014	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1104247	shares
CY2015	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	238000000	USD
CY2014	us-gaap	Interest Expense InterestExpense	210000000	USD
CY2015Q4	us-gaap	Assets Of Disposal Group Including Discontinued Operation Current AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent	0	USD
CY2013	us-gaap	Other Income OtherIncome	-29000000	USD
CY2014	mbi	Transfers Out Of Level Two TransfersOutOfLevelTwo	240000000	USD
CY2015Q4	us-gaap	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Three And Within Four Years From Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate	138000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-27000000	USD
CY2013	us-gaap	Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation	4000000	USD
CY2015Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2015Q4	mbi	Number Of Other Lawsuits NumberOfOtherLawsuits	0	Lawsuits
CY2015Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability	-71000000	USD
CY2013Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1051000000	USD
CY2015	mbi	Transfers Into Level Three TransfersIntoLevelThree	43000000	USD
CY2015Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2014	us-gaap	Repayments Of Medium Term Notes RepaymentsOfMediumTermNotes	168000000	USD
CY2015	mbi	Segment Expense SegmentExpense	564000000	USD
CY2014Q4	mbi	Approximate Percentage Of Level3 Assets At Fair Value In Total Assets Measured At Fair Value ApproximatePercentageOfLevel3AssetsAtFairValueInTotalAssetsMeasuredAtFairValue	0.2	pure
CY2015Q4	us-gaap	Stockholders Equity StockholdersEquity	3729000000	USD
CY2014	mbi	Transfers Into And Out Of Level One TransfersIntoAndOutOfLevelOne	0	USD
CY2015	dei	Trading Symbol TradingSymbol	MBI
CY2015	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	6000000	USD
CY2015Q4	mbi	Reinsurance Recoverable On Unpaid Loss Adjustment Expenses ReinsuranceRecoverableOnUnpaidLossAdjustmentExpenses	0	USD
CY2014	mbi	Transfers Into Level Two TransfersIntoLevelTwo	140000000	USD
CY2014Q4	mbi	Reinsurance Recoverable On Unpaid Loss Adjustment Expenses ReinsuranceRecoverableOnUnpaidLossAdjustmentExpenses	1000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions	18000000	USD
CY2015Q4	us-gaap	Treasury Stock Value TreasuryStockValue	2668000000	USD
CY2015	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	0	USD
CY2015Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue	98000000	USD
CY2014	mbi	Unvested Restricted Stock And Units That Receive Nonforfeitable Dividends Or Dividend Equivalents That Have Met Service Condition UnvestedRestrictedStockAndUnitsThatReceiveNonforfeitableDividendsOrDividendEquivalentsThatHaveMetServiceCondition	412769	shares
CY2013	us-gaap	Repayments Of Medium Term Notes RepaymentsOfMediumTermNotes	197000000	USD
CY2014	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-515000000	USD
CY2015	us-gaap	Payments To Acquire Loans Receivable PaymentsToAcquireLoansReceivable	0	USD
CY2015Q4	us-gaap	Derivative Collateral Right To Reclaim Cash DerivativeCollateralRightToReclaimCash	50000000	USD
CY2015	us-gaap	Available For Sale Securities Gross Realized Gains AvailableForSaleSecuritiesGrossRealizedGains	32000000	USD
CY2015	mbi	Payments For Net Realized Losses On Insured Derivatives Paid PaymentsForNetRealizedLossesOnInsuredDerivativesPaid	42000000	USD
CY2015	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2015	mbi	Payments For Deconsolidation Of Variable Interest Entity PaymentsForDeconsolidationOfVariableInterestEntity	0	USD
CY2014	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-6000000	USD
CY2013Q4	mbi	Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLosses	900000000	USD
CY2014	mbi	Revenues Of Consolidated Vies RevenuesOfConsolidatedVies	101000000	USD
CY2014Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	1
CY2015Q4	mbi	Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Sixth Through Tenth Year Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringSixthThroughTenthYearFollowingBalanceSheetDate	486000000	USD
CY2013	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	0	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	5000000	USD
CY2014	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	240000000	USD
CY2014	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	484000000	USD
CY2014Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	1
CY2014Q4	mbi	Number Of Policies NumberOfPolicies	315
CY2013	us-gaap	Incremental Common Shares Attributable To Call Options And Warrants IncrementalCommonSharesAttributableToCallOptionsAndWarrants	0	shares
CY2015Q4	mbi	Aggregate Principal Amount In Excess Of Failureto Make Payment At Maturity AggregatePrincipalAmountInExcessOfFailuretoMakePaymentAtMaturity	10000000	USD
CY2014	mbi	Segment Expense SegmentExpense	629000000	USD
CY2015Q4	us-gaap	Liabilities Liabilities	11114000000	USD
CY2013	us-gaap	Stock Issued During Period Shares Stock Options Exercised StockIssuedDuringPeriodSharesStockOptionsExercised	0	shares
CY2015Q4	us-gaap	Summary Of Investments Other Than Investments In Related Parties Carrying Amount SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount	6350000000	USD
CY2015Q4	mbi	Fair Value Of Credit Support Annexes FairValueOfCreditSupportAnnexes	3000000	USD
CY2014	us-gaap	Other Income OtherIncome	28000000	USD
CY2015Q4	us-gaap	Held To Maturity Securities Fair Value HeldToMaturitySecuritiesFairValue	2401000000	USD
CY2014Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability	-24000000	USD
CY2013	us-gaap	Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice	16.3382
CY2014Q4	us-gaap	Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest	4620000000	USD
CY2015	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	7000000	USD
CY2015Q4	mbi	Impact Of Non Performance Risk On Insured Derivative Liability ImpactOfNonPerformanceRiskOnInsuredDerivativeLiability	99000000	USD
CY2014	mbi	Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesBeforeTax	-85000000	USD
CY2014Q4	us-gaap	Liabilities Of Disposal Group Including Discontinued Operation LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation	772000000	USD
CY2015	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-53000000	USD
CY2014Q4	us-gaap	Surplus Notes SurplusNotes	940000000	USD
CY2014	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax	-40000000	USD
CY2014	mbi	Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses After Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesAfterTax	-54000000	USD
CY2014	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	1000000	USD
CY2013Q4	us-gaap	Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber	3715406	shares
CY2015	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	3000000	USD
CY2013	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	232000000	USD
CY2013	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	13000000	USD
CY2013	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	0	USD
CY2014	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	1000000	USD
CY2015Q4	mbi	Preferred Stock Of Subsidiary And Noncontrolling Interest Value PreferredStockOfSubsidiaryAndNoncontrollingInterestValue	12000000	USD

CY2015

us-gaap

Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate

FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate

0.0182

pure

CY2014

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

0

USD

CY2013

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

4000000

USD

CY2015Q4

mbi

Approximate Percentage Of Level3 Assets At Fair Value In Total Assets Measured At Fair Value

ApproximatePercentageOfLevel3AssetsAtFairValueInTotalAssetsMeasuredAtFairValue

0.19

pure

CY2013

us-gaap

Net Cash Provided By Used In Financing Activities Continuing Operations

NetCashProvidedByUsedInFinancingActivitiesContinuingOperations

-1566000000

USD

CY2015

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

174000000

USD

CY2015Q4

mbi

Approximate Percentage Of Level3 Liabilities At Fair Value In Total Liabilities Measured At Fair Value

ApproximatePercentageOfLevel3LiabilitiesAtFairValueInTotalLiabilitiesMeasuredAtFairValue

0.52

pure

CY2013

us-gaap

Payments For Proceeds From Derivative Instrument Investing Activities

PaymentsForProceedsFromDerivativeInstrumentInvestingActivities

54000000

USD

CY2014Q4

us-gaap

Security Owned And Pledged As Collateral Fair Value

SecurityOwnedAndPledgedAsCollateralFairValue

532000000

USD

CY2015

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Other

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesOther

-37000000

USD

CY2013

us-gaap

Payments For Operating Activities

PaymentsForOperatingActivities

277000000

USD

CY2014

mbi

Segment Pretax Income Loss

SegmentPretaxIncomeLoss

641000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

132000000

USD

CY2015Q4

us-gaap

Variable Interest Entity Consolidated Carrying Amount Liabilities

VariableInterestEntityConsolidatedCarryingAmountLiabilities

5100000000

USD

CY2015Q4

mbi

Cash And Money Market Securities Collateral For Investment Agreements

CashAndMoneyMarketSecuritiesCollateralForInvestmentAgreements

12000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than One And Within Two Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate

162000000

USD

CY2015Q4

mbi

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Eleventh Through Fifteenth Year Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringEleventhThroughFifteenthYearFollowingBalanceSheetDate

287000000

USD

CY2014Q4

us-gaap

Preferred Stock Value

PreferredStockValue

0

USD

CY2015

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

-81000000

USD

CY2014

mbi

Payments For Deconsolidation Of Variable Interest Entity

PaymentsForDeconsolidationOfVariableInterestEntity

-18000000

USD

CY2013

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

67000000

USD

CY2014Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

209000000

USD

CY2015

dei

Entity Registrant Name

EntityRegistrantName

MBIA INC

CY2014

us-gaap

Repayments Of Notes Payable

RepaymentsOfNotesPayable

609000000

USD

CY2014Q4

mbi

Insurance Loss Recoverable

InsuranceLossRecoverable

533000000

USD

CY2014Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

2000000

USD

CY2014

mbi

Segment Revenue

SegmentRevenue

1270000000

USD

CY2013Q4

us-gaap

Assets

16953000000

USD

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Net Discount

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityNetDiscount

116000000

USD

CY2015

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

-26000000

USD

CY2014

us-gaap

Selling General And Administrative Expense

SellingGeneralAndAdministrativeExpense

239000000

USD

CY2015

mbi

Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange

NetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange

63000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Accumulated Unrecognized Holding Loss

HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss

202000000

USD

CY2014

us-gaap

Payments For Operating Activities

PaymentsForOperatingActivities

238000000

USD

CY2014

us-gaap

Net Income Loss

NetIncomeLoss

569000000

USD

CY2013

us-gaap

Repayments Of Other Long Term Debt

RepaymentsOfOtherLongTermDebt

285000000

USD

CY2013

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

-213000000

USD

CY2014

mbi

Weighted Average Contractual Maturity Period Of Securities Unrealized Loss Position

WeightedAverageContractualMaturityPeriodOfSecuritiesUnrealizedLossPosition

P13Y

CY2013Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

3299000000

USD

CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal

11263000000

USD

CY2014

us-gaap

Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

2000000

USD

CY2015Q4

us-gaap

Summary Of Investments Other Than Investments In Related Parties Cost

SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCost

6371000000

USD

CY2014Q4

us-gaap

Liabilities

12334000000

USD

CY2015

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

-82000000

USD

CY2015

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses After Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesAfterTax

-2000000

USD

CY2015Q4

mbi

Senior Notes At Par Value Owned By National

SeniorNotesAtParValueOwnedByNational

136000000

USD

CY2015Q4

us-gaap

Held To Maturity Securities Accumulated Unrecognized Holding Gain

HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain

24000000

USD

CY2014

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

3000000

USD

CY2015

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesTax

-1000000

USD

CY2014Q4

mbi

Other Liabilities And Derivative Liabilities Vie After Counterparty Netting And Embedded Reclass

OtherLiabilitiesAndDerivativeLiabilitiesVieAfterCounterpartyNettingAndEmbeddedReclass

437000000

USD

CY2014

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

-43000000

USD

CY2015Q4

mbi

Contract Claims On Ineligible Mortgage Loans Inception To Date Incurred Loss On Transactions

ContractClaimsOnIneligibleMortgageLoansInceptionToDateIncurredLossOnTransactions

424000000

USD

CY2014Q4

us-gaap

Treasury Stock Value

TreasuryStockValue

2359000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Third Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringThirdQuarterFollowingBalanceSheetDate

45000000

USD

CY2014Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

782000000

USD

CY2015

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

109000000

USD

CY2014Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

6571000000

USD

CY2015

mbi

Weighted Average Contractual Maturity Period Of Securities Unrealized Loss Position

WeightedAverageContractualMaturityPeriodOfSecuritiesUnrealizedLossPosition

P17Y

CY2014Q4

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLosses

680000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Accumulated Unrecognized Holding Gain

HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingGain

77000000

USD

CY2013

us-gaap

Proceeds From Insurance Premiums Collected

ProceedsFromInsurancePremiumsCollected

185000000

USD

CY2015Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Fair Value

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue

1373000000

USD

CY2014

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

254000000

USD

CY2013

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

452000000

USD

CY2014

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

174000000

USD

CY2013

mbi

Payments For Net Realized Losses On Insured Derivatives Paid

PaymentsForNetRealizedLossesOnInsuredDerivativesPaid

458000000

USD

CY2014

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

2.76

CY2014

us-gaap

Net Cash Provided By Used In Operating Activities Continuing Operations

NetCashProvidedByUsedInOperatingActivitiesContinuingOperations

-333000000

USD

CY2014

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Net Of Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesNetOfTax

-4000000

USD

CY2015Q4

us-gaap

Treasury Stock Shares

TreasuryStockShares

130303241

shares

CY2015

us-gaap

Insurance Recoveries

InsuranceRecoveries

0

USD

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability

797000000

USD

CY2014

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

676000000

USD

CY2014

us-gaap

Net Cash Provided By Used In Financing Activities Continuing Operations

NetCashProvidedByUsedInFinancingActivitiesContinuingOperations

-892000000

USD

CY2013

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax

5000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

373000000

USD

CY2014

us-gaap

Interest Paid Net

InterestPaidNet

179000000

USD

CY2014Q4

mbi

Transactions Guaranteed On Behalf Of Various Affiliates

TransactionsGuaranteedOnBehalfOfVariousAffiliates

2600000000

USD

CY2014

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

1494000000

USD

CY2015

us-gaap

Proceeds From Interest And Dividends Received

ProceedsFromInterestAndDividendsReceived

353000000

USD

CY2015

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations

EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations

-8000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Fair Value

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionFairValue

373000000

USD

CY2013

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

2000000

USD

CY2015Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

2325300

shares

CY2015Q4

mbi

Derivative Fair Value Of Derivative Asset Net Of Counterparty Netting

DerivativeFairValueOfDerivativeAssetNetOfCounterpartyNetting

19000000

USD

CY2014Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

281352782

shares

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Fourth Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFourthQuarterFollowingBalanceSheetDate

44000000

USD

CY2014

mbi

Collections For Cases With Recoveries

CollectionsForCasesWithRecoveries

108000000

USD

CY2014Q4

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

2858000000

USD

CY2013

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

1000000

USD

CY2014

us-gaap

Fees And Commissions Other

FeesAndCommissionsOther

2000000

USD

CY2015Q4

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

85000000

USD

CY2014Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

12000000

USD

CY2014

us-gaap

Revenue Other Financial Services

RevenueOtherFinancialServices

616000000

USD

CY2015Q4

us-gaap

Derivative Collateral Right To Reclaim Securities

DerivativeCollateralRightToReclaimSecurities

259000000

USD

CY2013

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesTax

2000000

USD

CY2014

us-gaap

Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1

FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1

P9Y2M4D

CY2015

us-gaap

Proceeds From Sale And Maturity Of Held To Maturity Securities

ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

67000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Four And Within Five Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate

128000000

USD

CY2015Q4

mbi

Number Of Policies

NumberOfPolicies

411

CY2014Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

13.466

CY2015

mbi

Premiums Earned Net Financial Guarantee Insurance Contracts And Insured Derivatives

PremiumsEarnedNetFinancialGuaranteeInsuranceContractsAndInsuredDerivatives

385000000

USD

CY2015

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-260000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

172000000

USD

CY2013

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

0

USD

CY2013

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

-76000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

0

USD

CY2014Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

400000000

shares

CY2013

us-gaap

Payments To Acquire Property Plant And Equipment

PaymentsToAcquirePropertyPlantAndEquipment

3000000

USD

CY2014

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-412000000

USD

CY2015Q4

mbi

Transactions Guaranteed On Behalf Of Various Affiliates

TransactionsGuaranteedOnBehalfOfVariousAffiliates

2200000000

USD

CY2013

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

0

USD

CY2015

dei

Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

CY2013

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax

3000000

USD

CY2014Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

851000000

USD

CY2014

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesTax

-2000000

USD

CY2015Q4

us-gaap

Participating Policies As Percentage Of Gross Insurance In Force

ParticipatingPoliciesAsPercentageOfGrossInsuranceInForce

1

pure

CY2015Q4

mbi

Incentive Stock Options And Non Qualified Stock Options Granted Price At Fair Value Of Common Stock Percentage

IncentiveStockOptionsAndNonQualifiedStockOptionsGrantedPriceAtFairValueOfCommonStockPercentage

1

pure

CY2015

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

289000000

USD

CY2015

mbi

Increase Decrease In Loss Adjustment Expense Recoveries

IncreaseDecreaseInLossAdjustmentExpenseRecoveries

5000000

USD

CY2014

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

107000000

USD

CY2015Q4

us-gaap

Summary Of Investments Other Than Investments In Related Parties Fair Value

SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesFairValue

6350000000

USD

CY2015

mbi

Proceeds From Consolidation Of Variable Interest Entity

ProceedsFromConsolidationOfVariableInterestEntity

7000000

USD

CY2015

us-gaap

Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax

OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax

-14000000

USD

CY2013

mbi

Premiums Earned Net Financial Guarantee Insurance Contracts And Insured Derivatives

PremiumsEarnedNetFinancialGuaranteeInsuranceContractsAndInsuredDerivatives

494000000

USD

CY2015Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2015

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

4000000

USD

CY2014Q4

mbi

Held To Maturity Cumulative Other Than Temporary Impairment Of Securities

HeldToMaturityCumulativeOtherThanTemporaryImpairmentOfSecurities

0

USD

CY2014Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

2071000000

USD

CY2014Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

3950000000

USD

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest

6247000000

USD

CY2015

mbi

Annual Compensation Maximum Pension Per Employee Amount

AnnualCompensationMaximumPensionPerEmployeeAmount

1500000

USD

CY2015

us-gaap

Net Cash Provided By Used In Financing Activities Continuing Operations

NetCashProvidedByUsedInFinancingActivitiesContinuingOperations

-1014000000

USD

CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding

147

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Three And Within Four Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate

64000000

USD

CY2014Q4

us-gaap

Stockholders Equity

StockholdersEquity

3929000000

USD

CY2014Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

3128000000

USD

CY2014Q4

us-gaap

Commitments And Contingencies

CommitmentsAndContingencies

USD

CY2015Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

2325300

shares

CY2015Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingIntrinsicValue

4000000

USD

CY2015

mbi

Increase Decrease In Other Net Realized Gains Losses

IncreaseDecreaseInOtherNetRealizedGainsLosses

-17000000

USD

CY2014

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

629000000

USD

CY2015

us-gaap

Proceeds From Sale And Collection Of Loans Receivable

ProceedsFromSaleAndCollectionOfLoansReceivable

232000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValue

2802000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Fair Value

HeldToMaturitySecuritiesFairValue

2632000000

USD

CY2015

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

-47000000

USD

CY2014Q4

us-gaap

Assets

16284000000

USD

CY2014Q4

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

6509000000

USD

CY2015Q4

mbi

Percentage Of Insured Credit Derivatives Value Under Direct Price Model And Dual Default Model

PercentageOfInsuredCreditDerivativesValueUnderDirectPriceModelAndDualDefaultModel

0.12

pure

CY2013

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax

0

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

2389000000

USD

CY2015

us-gaap

Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities

AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

-235000000

USD

CY2015

us-gaap

Policyholder Benefits And Claims Incurred Net

PolicyholderBenefitsAndClaimsIncurredNet

123000000

USD

CY2014

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

17000000

USD

CY2014

us-gaap

Repayments Of Other Long Term Debt

RepaymentsOfOtherLongTermDebt

192000000

USD

CY2013

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

268000000

USD

CY2014

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-138000000

USD

CY2014Q4

mbi

Approximate Percentage Of Level3 Liabilities At Fair Value In Total Liabilities Measured At Fair Value

ApproximatePercentageOfLevel3LiabilitiesAtFairValueInTotalLiabilitiesMeasuredAtFairValue

0.35

pure

CY2013

us-gaap

Proceeds From Interest And Dividends Received

ProceedsFromInterestAndDividendsReceived

426000000

USD

CY2015Q4

us-gaap

Assets Fair Value Disclosure Recurring

AssetsFairValueDisclosureRecurring

9503000000

USD

CY2015

dei

Amendment Flag

AmendmentFlag

false

CY2015Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

280000000

USD

CY2015

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

933470

shares

CY2013Q4

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

175000000

USD

CY2014Q4

us-gaap

Assets Fair Value Disclosure Recurring

AssetsFairValueDisclosureRecurring

10613000000

USD

CY2014

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations

EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations

-8000000

USD

CY2015Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

17000000

USD

CY2015

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax

0

USD

CY2014Q4

mbi

Fair Value Of Securities On Deposit With Various Regulatory Authorities

FairValueOfSecuritiesOnDepositWithVariousRegulatoryAuthorities

10000000

USD

CY2014

mbi

Premiums Earned Net Financial Guarantee Insurance Contracts And Insured Derivatives

PremiumsEarnedNetFinancialGuaranteeInsuranceContractsAndInsuredDerivatives

416000000

USD

CY2013

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

8000000

USD

CY2015Q4

mbi

Lae Insurance Loss Recoverable

LaeInsuranceLossRecoverable

6000000

USD

CY2015Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

3138000000

USD

CY2015

dei

Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

CY2013

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows

6000000

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CY2015Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

6.3703

CY2015

us-gaap

Available For Sale Securities Gross Realized Gains Losses Sale Proceeds

AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds

1145000000

USD

CY2014

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Other

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesOther

-7000000

USD

CY2015Q4

us-gaap

Available For Sale Securities

AvailableForSaleSecurities

6120000000

USD

CY2014

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

28000000

USD

CY2014

us-gaap

Undistributed Earnings Loss Allocated To Participating Securities Basic

UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

16000000

USD

CY2014Q4

mbi

Cash And Money Market Securities Collateral For Investment Agreements

CashAndMoneyMarketSecuritiesCollateralForInvestmentAgreements

26000000

USD

CY2015

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-50000000

USD

CY2013

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses After Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesAfterTax

9000000

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CY2015

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

5000000

USD

CY2015

us-gaap

Cumulative Effect Of Prospective Application Of New Accounting Principle

CumulativeEffectOfProspectiveApplicationOfNewAccountingPrinciple

-9000000

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CY2014

us-gaap

Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period

InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod

P7Y8M12D

CY2015Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

88000000

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CY2014

us-gaap

Incremental Common Shares Attributable To Call Options And Warrants

IncrementalCommonSharesAttributableToCallOptionsAndWarrants

1622877

shares

CY2015Q4

us-gaap

Held To Maturity Securities

HeldToMaturitySecurities

2689000000

USD

CY2014

mbi

Increase Decrease In Insurance Loss Recoverable

IncreaseDecreaseInInsuranceLossRecoverable

-162000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Amortized Cost

AvailableForSaleSecuritiesAmortizedCost

6160000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Two And Within Three Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate

68000000

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CY2014

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

2.94

CY2014

us-gaap

Proceeds From Sale And Collection Of Loans Receivable

ProceedsFromSaleAndCollectionOfLoansReceivable

313000000

USD

CY2015Q4

mbi

Held To Maturity Cumulative Other Than Temporary Impairment Of Securities

HeldToMaturityCumulativeOtherThanTemporaryImpairmentOfSecurities

0

USD

CY2014Q4

us-gaap

Long Term Debt Noncurrent

LongTermDebtNoncurrent

1810000000

USD

CY2013Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

1258000000

USD

CY2015

us-gaap

Proceeds From Insurance Premiums Collected

ProceedsFromInsurancePremiumsCollected

95000000

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CY2015

us-gaap

Proceeds From Insurance Settlement Operating Activities

ProceedsFromInsuranceSettlementOperatingActivities

0

USD

CY2013

us-gaap

Repayments Of Notes Payable

RepaymentsOfNotesPayable

1112000000

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CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

413000000

USD

CY2015Q4

us-gaap

Deferred Tax Liabilities

DeferredTaxLiabilities

12000000

USD

CY2015Q4

mbi

Other Assets And Derivative Assets Vie After Counterparty Netting And Embedded Reclass

OtherAssetsAndDerivativeAssetsVieAfterCounterpartyNettingAndEmbeddedReclass

14000000

USD

CY2015Q4

mbi

Derivative Asset Counterparty Netting Amount Fair Value

DerivativeAssetCounterpartyNettingAmountFairValue

1000000

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CY2015

us-gaap

Interest Paid Net

InterestPaidNet

169000000

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CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Four And Within Five Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate

61000000

USD

CY2015

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

2146000000

USD

CY2015

mbi

Proceeds From Reinsurance And Recoveries

ProceedsFromReinsuranceAndRecoveries

85000000

USD

CY2015Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2015Q4

mbi

Available For Sale Cumulative Other Than Temporary Impairment Of Securities

AvailableForSaleCumulativeOtherThanTemporaryImpairmentOfSecurities

89000000

USD

CY2013

mbi

Segment Revenue

SegmentRevenue

1209000000

USD

CY2015

mbi

Percentage Of Adjusted Net Investment Income

PercentageOfAdjustedNetInvestmentIncome

1

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CY2013

us-gaap

Insurance Recoveries

InsuranceRecoveries

4000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected During First Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringFirstQuarterFollowingBalanceSheetDate

17000000

USD

CY2013

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

108000000

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CY2015Q4

us-gaap

Debt Instrument Carrying Amount

DebtInstrumentCarryingAmount

582000000

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CY2014

us-gaap

Insurance Recoveries

InsuranceRecoveries

5000000

USD

CY2014

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

72000000

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CY2014Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

21000000

USD

CY2015

us-gaap

Increase Decrease In Interest Payable Net

IncreaseDecreaseInInterestPayableNet

105000000

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CY2014

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

32000000

USD

CY2014

mbi

Proceeds From Sales Maturities And Paydowns Of Fair Value And Trading Securities

ProceedsFromSalesMaturitiesAndPaydownsOfFairValueAndTradingSecurities

789000000

USD

CY2015

mbi

Increase Decrease In Insurance Loss Recoverable

IncreaseDecreaseInInsuranceLossRecoverable

44000000

USD

CY2013

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

1241902

shares

CY2015

mbi

Transfers Out Of Level Three

TransfersOutOfLevelThree

126000000

USD

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Gross Potential Recoveries

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityGrossPotentialRecoveries

752000000

USD

CY2014

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

83000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

202000000

USD

CY2014Q4

mbi

Derivative Liability Counterparty Netting

DerivativeLiabilityCounterpartyNetting

81000000

USD

CY2015

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesTax

-1000000

USD

CY2014Q4

us-gaap

Assets Of Disposal Group Including Discontinued Operation Current

AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent

802000000

USD

CY2015

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

163936318

shares

CY2014Q4

us-gaap

Held To Maturity Securities

HeldToMaturitySecurities

2757000000

USD

CY2014Q4

mbi

Lae Insurance Loss Recoverable

LaeInsuranceLossRecoverable

0

USD

CY2013

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

16000000

USD

CY2013

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus

0

USD

CY2013

us-gaap

Undistributed Earnings Loss Allocated To Participating Securities Basic

UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

5000000

USD

CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Gross Potential Recoveries

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityGrossPotentialRecoveries

860000000

USD

CY2013

mbi

Premiums Written Financial Guarantee Insurance Contracts Percentage Of Amount Assumed To Net

PremiumsWrittenFinancialGuaranteeInsuranceContractsPercentageOfAmountAssumedToNet

-0.02

pure

CY2013

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax

5000000

USD

CY2013

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

443000000

USD

CY2013

us-gaap

Proceeds From Notes Payable

ProceedsFromNotesPayable

0

USD

CY2015

us-gaap

Net Cash Provided By Used In Operating Activities Continuing Operations

NetCashProvidedByUsedInOperatingActivitiesContinuingOperations

-55000000

USD

CY2014Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

202000000

USD

CY2014

us-gaap

Policyholder Benefits And Claims Incurred Net

PolicyholderBenefitsAndClaimsIncurredNet

133000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than One And Within Two Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate

75000000

USD

CY2014Q4

us-gaap

Debt Instrument Carrying Amount

DebtInstrumentCarryingAmount

592000000

USD

CY2015

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

0

USD

CY2014

mbi

Proceeds From Consolidation Of Variable Interest Entity

ProceedsFromConsolidationOfVariableInterestEntity

221000000

USD

CY2015

mbi

Transfers Into And Out Of Level One

TransfersIntoAndOutOfLevelOne

0

USD

CY2015

us-gaap

Fees And Commissions Other

FeesAndCommissionsOther

1000000

USD

CY2015

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

98000000

USD

CY2013

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesTax

6000000

USD

CY2014

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax

-9000000

USD

CY2014

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

757000000

USD

CY2014

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

903000000

USD

CY2015

us-gaap

Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

9000000

USD

CY2015Q4

mbi

Surplus Notes At Par Value Owned By Corporate Segment

SurplusNotesAtParValueOwnedByCorporateSegment

13000000

USD

CY2013

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Net Of Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesNetOfTax

3000000

USD

CY2014Q4

us-gaap

Derivative Collateral Right To Reclaim Securities

DerivativeCollateralRightToReclaimSecurities

198000000

USD

CY2015

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

13000000

USD

CY2014Q4

mbi

Accumulated Other Comprehensive Income Loss Deferred Income Tax

AccumulatedOtherComprehensiveIncomeLossDeferredIncomeTax

7000000

USD

CY2013

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesBeforeTax

15000000

USD

CY2014

mbi

Vie Interest Net

VieInterestNet

77000000

USD

CY2013

mbi

Payments To Acquire Fair Value Option And Trading Securities

PaymentsToAcquireFairValueOptionAndTradingSecurities

371000000

USD

CY2015

mbi

Percentage Of Policyholders Surplus

PercentageOfPolicyholdersSurplus

0.1

pure

CY2014Q4

us-gaap

Reinsurance Payable

ReinsurancePayable

56000000

USD

CY2015

us-gaap

Repayments Of Other Long Term Debt

RepaymentsOfOtherLongTermDebt

116000000

USD

CY2014Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

1798000

shares

CY2014Q4

us-gaap

Treasury Stock Shares

TreasuryStockShares

89409887

shares

CY2013

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

1726000000

USD

CY2013

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

29000000

USD

CY2013Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice

38.512

CY2014Q4

mbi

Aggregate Amount Of Insured Par Outstanding Ceded To Reinsurers

AggregateAmountOfInsuredParOutstandingCededToReinsurers

6100000000

USD

CY2013

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod

2247862

shares

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Third Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringThirdQuarterFollowingBalanceSheetDate

18000000

USD

CY2016Q1

dei

Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

136600851

shares

CY2015

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

3000000

USD

CY2015

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

-31000000

USD

CY2015

us-gaap

Income Taxes Paid Net

IncomeTaxesPaidNet

9000000

USD

CY2015

mbi

Increase Decrease In Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange

IncreaseDecreaseInNetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange

105000000

USD

CY2014

us-gaap

Proceeds From Sale And Maturity Of Held To Maturity Securities

ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

44000000

USD

CY2015

mbi

Maximum Percentage Of Notional Asset Swap

MaximumPercentageOfNotionalAssetSwap

0.05

pure

CY2015

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

1000000

USD

CY2015

us-gaap

Sharebased Compensation Arrangement By Sharebased Payment Award Options Outstanding Weighted Average Remaining Contractual Term2

SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsOutstandingWeightedAverageRemainingContractualTerm2

P0Y8M15D

CY2014

mbi

Expenses Of Consolidated Vies

ExpensesOfConsolidatedVies

47000000

USD

CY2015

mbi

Expenses Of Consolidated Vies

ExpensesOfConsolidatedVies

52000000

USD

CY2013

us-gaap

Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price

ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

0

CY2013

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

1000000

USD

CY2014

mbi

Number Of Credit Support Annexes

NumberOfCreditSupportAnnexes

1

pure

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding

17407000000

USD

CY2015

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

174000000

USD

CY2014Q4

mbi

Derivative Fair Value Of Derivative Liability Net Of Counterparty Netting

DerivativeFairValueOfDerivativeLiabilityNetOfCounterpartyNetting

456000000

USD

CY2014Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

10000000

shares

CY2014

mbi

Increase Decrease In Loss Adjustment Expense Recoveries

IncreaseDecreaseInLossAdjustmentExpenseRecoveries

1000000

USD

CY2013

us-gaap

Payments To Acquire Loans Receivable

PaymentsToAcquireLoansReceivable

0

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognized

1787000000

USD

CY2014Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

16284000000

USD

CY2015

us-gaap

Selling General And Administrative Expense

SellingGeneralAndAdministrativeExpense

190000000

USD

CY2014Q4

mbi

Other Assets And Derivative Assets Vie After Counterparty Netting And Embedded Reclass

OtherAssetsAndDerivativeAssetsVieAfterCounterpartyNettingAndEmbeddedReclass

2000000

USD

CY2015Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

6000000

USD

CY2014Q4

mbi

Impact Of Non Performance Risk On Insured Derivative Liability

ImpactOfNonPerformanceRiskOnInsuredDerivativeLiability

92000000

USD

CY2015

us-gaap

Repayments Of Notes Payable

RepaymentsOfNotesPayable

490000000

USD

CY2015Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

400000000

shares

CY2014Q4

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

16000000

USD

CY2014Q4

us-gaap

Variable Interest Entity Consolidated Carrying Amount Liabilities

VariableInterestEntityConsolidatedCarryingAmountLiabilities

4800000000

USD

CY2015Q4

us-gaap

Reinsurance Receivables Case Basis

ReinsuranceReceivablesCaseBasis

6000000

USD

CY2013

us-gaap

Proceeds From Sale And Maturity Of Held To Maturity Securities

ProceedsFromSaleAndMaturityOfHeldToMaturitySecurities

28000000

USD

CY2015Q4

mbi

Fair Value Of Securities On Deposit With Various Regulatory Authorities

FairValueOfSecuritiesOnDepositWithVariousRegulatoryAuthorities

10000000

USD

CY2015Q4

mbi

Surplus Notes Repurchased At Outstanding Par Value

SurplusNotesRepurchasedAtOutstandingParValue

47000000

USD

CY2015

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesBeforeTax

-4000000

USD

CY2013

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-40000000

USD

CY2013

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

358000000

USD

CY2014Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2015

mbi

Realized Gains Losses And Other Settlements On Insured Derivatives Total

RealizedGainsLossesAndOtherSettlementsOnInsuredDerivativesTotal

0

USD

CY2014

us-gaap

Other Comprehensive Income Foreign Currency Translation Gain Loss Arising During Period Tax

OtherComprehensiveIncomeForeignCurrencyTranslationGainLossArisingDuringPeriodTax

-13000000

USD

CY2013

mbi

Payments For Deconsolidation Of Variable Interest Entity

PaymentsForDeconsolidationOfVariableInterestEntity

26000000

USD

CY2013Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableNumber

1752311

shares

CY2015

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

-1000000

USD

CY2014

us-gaap

Proceeds From Insurance Premiums Collected

ProceedsFromInsurancePremiumsCollected

193000000

USD

CY2015

us-gaap

Increase Decrease In Loss And Loss Adjustment Expense Reserve

IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve

-12000000

USD

CY2015

us-gaap

Repayments Of Medium Term Notes

RepaymentsOfMediumTermNotes

118000000

USD

CY2013Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

20.6883

CY2014

us-gaap

Increase Decrease In Interest Payable Net

IncreaseDecreaseInInterestPayableNet

106000000

USD

CY2014

us-gaap

Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities

AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities

-902000000

USD

CY2015Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

14855000000

USD

CY2015Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Accumulated Loss

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

312000000

USD

CY2013

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

0

USD

CY2014

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

15000000

USD

CY2013

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

245000000

USD

CY2014

mbi

Payments For Net Realized Losses On Insured Derivatives Paid

PaymentsForNetRealizedLossesOnInsuredDerivativesPaid

432000000

USD

CY2014

mbi

Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange

NetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange

78000000

USD

CY2015

mbi

Segment Revenue

SegmentRevenue

853000000

USD

CY2014

us-gaap

Undistributed Earnings Loss Allocated To Participating Securities Diluted

UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

15000000

USD

CY2014

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

50000000

USD

CY2015Q4

mbi

Accumulated Other Comprehensive Income Loss Deferred Income Tax

AccumulatedOtherComprehensiveIncomeLossDeferredIncomeTax

51000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Second Quarter Following The Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringSecondQuarterFollowingTheBalanceSheetDate

28000000

USD

CY2014

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

15000000

USD

CY2015

mbi

Number Of Variable Interest Entities Consolidated

NumberOfVariableInterestEntitiesConsolidated

1

pure

CY2015

us-gaap

Description Of New Accounting Pronouncements Not Yet Adopted

DescriptionOfNewAccountingPronouncementsNotYetAdopted

<div>Recent Accounting Developments Revenue from Contracts with Customers (Topic 606) (ASU 2014-09) and Deferral of the Effective Date (ASU 2015-14)In May of 2014, the FASB issued ASU 2014-09, “Revenue from Contracts with Customers (Topic 606).” ASU 2014-09 amends the accounting guidance for recognizing revenue for the transfer of goods or services from contracts with customers unless those contracts are within the scope of other accounting standards. ASU 2014-09 does not apply to financial guarantee insurance contracts within the scope of Topic 944, “Financial Services — Insurance.” In August of 2015, the FASB issued ASU 2015-14, “Revenue from Contracts with Customers (Topic 606) — Deferral of the Effective Date.” ASU 2015-14 defers the effective date of ASU 2014-09 to interim and annual periods beginning January 1, 2018, and is applied on a retrospective or modified retrospective basis. The adoption of ASU 2014-09 is not expected to materially impact the Company’s consolidated financial statements.Compensation-Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period (A Consensus of the FASB Emerging Issues Task Force) (ASU 2014-12)In June of 2014, the FASB issued ASU 2014-12, “Compensation-Stock Compensation (Topic 718): Accounting for Share-Based Payments When the Terms of an Award Provide That a Performance Target Could Be Achieved after the Requisite Service Period.” ASU 2014-12 requires that a performance target that affects vesting of share-based payment awards and that could be achieved after an employee’s requisite service period be accounted for as a performance condition. ASU 2014-12 is effective for interim and annual periods beginning January 1, 2016 with early adoption permitted, and is applied on a prospective basis or retrospective basis. The adoption of ASU 2014-12 is not expected to materially impact the Company’s consolidated financial statements.Consolidation (Topic 810): Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity (ASU 2014-13) In August of 2014, the FASB issued ASU 2014-13, “Consolidation (Topic 810): Measuring the Financial Assets and the Financial Liabilities of a Consolidated Collateralized Financing Entity.” ASU 2014-13 applies to a consolidated collateralized financing entity defined as a consolidated VIE that holds financial assets and issues beneficial interests in those financial assets that are classified as financial liabilities. The Company may elect to measure the financial assets and the financial liabilities of a consolidated collateralized financing entity using a measurement alternative provided in ASU 2014-13. The measurement alternative requires both the financial assets and the financial liabilities of the consolidated collateralized financing entity to be measured using the more observable of the fair value of the financial assets and the fair value of the financial liabilities with the changes in fair value recognized to earnings. Upon adoption, a reporting entity may apply the measurement alternative to existing consolidated collateralized financing entities. ASU 2014-13 is effective for interim and annual periods beginning January 1, 2016 with early adoption permitted. The adoption of ASU 2014-13 is not expected to materially impact the Company’s consolidated financial statements.Presentation of Financial Statements—Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern (ASU 2014-15)In August of 2014, the FASB issued ASU 2014-15, “Presentation of Financial Statements-Going Concern (Subtopic 205-40): Disclosure of Uncertainties about an Entity’s Ability to Continue as a Going Concern.” ASU 2014-15 requires management to evaluate whether there are conditions or events that raise substantial doubt about the entity’s ability to continue as a going concern, and to provide certain disclosures when it is probable that the entity will be unable to meet its obligations as they become due within one year after the date that the financial statements are issued. ASU 2014-15 is effective for the annual period ending December 31, 2016 and for annual periods and interim periods thereafter with early adoption permitted. The adoption of ASU 2014-15 is not expected to materially impact the Company’s consolidated financial statements.Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs (ASU 2015-03)In April of 2015, the FASB issued ASU 2015-03, “Interest-Imputation of Interest (Subtopic 835-30): Simplifying the Presentation of Debt Issuance Costs.” ASU 2015-03 requires debt issuance costs related to a debt liability measured at amortized cost to be reported in the balance sheet as a direct deduction from the face amount of the debt liability. ASU 2015-03 is effective for interim and annual periods beginning January 1, 2016 with early adoption permitted, and is applied on a retrospective basis. The adoption of ASU 2015-03 is not expected to materially impact the Company’s consolidated financial statements.Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities (ASU 2016-01)In January of 2016, the FASB issued ASU 2016-01, “Financial Instruments-Overall (Subtopic 825-10): Recognition and Measurement of Financial Assets and Financial Liabilities.” ASU 2016-01 requires certain equity investments other than those accounted for under the equity method of accounting or result in consolidation of the investee to be measured at fair value with changes in fair value recognized in net income, and permits an entity to measure equity investments that do not have readily determinable fair values at cost less any impairment plus or minus adjustments for certain changes in observable prices. An entity is also required to evaluate the need for a valuation allowance on a deferred tax asset related to AFS debt securities in combination with the entity’s other deferred tax assets. ASU 2016-01 requires an entity to present separately in other comprehensive income the portion of the total change in the fair value of a liability that results from a change in the instrument-specific credit risk for financial liabilities that the entity has elected to measure at fair value in accordance with the fair value option for financial instruments. ASU 2016-01 is effective for interim and annual periods beginning January 1, 2018, and is applied on a modified retrospective basis. Early adoption is not permitted with the exception of early application of the guidance that requires separate presentation in other comprehensive income of the change in the instrument-specific credit risk for financial liabilities measured at fair value in accordance with the fair value option is permitted as of the beginning of the fiscal year of adoption of the standard. The Company is evaluating the impact of adopting ASU 2016-01.Leases (Topic 842) (ASU 2016-02)In February of 2016, the FASB issued ASU 2016-02, “Leases (Topic 842)” that amends the accounting guidance for leasing transactions. ASU 2016-02 requires a lessee to classify lease contracts as finance or operating leases, and to recognize assets and liabilities for the rights and obligations created by leasing transactions with lease terms more than twelve months. ASU 2016-02 substantially retains the criteria for classifying leasing transactions as finance or operating leases. For finance leases, a lessee recognizes a right-of-use asset and a lease liability initially measured at the present value of the lease payments, and recognizes interest expense on the lease liability separately from the amortization of the right-of-use asset. For operating leases, a lessee recognizes a right-of-use asset and a lease liability initially measured at the present value of the lease payments, and recognizes lease expense on a straight-line basis. ASU 2016-02 is effective for interim and annual periods beginning January 1, 2019 with early adoption permitted, and is applied on a modified retrospective basis. The Company is evaluating the impact of adopting ASU 2016-02.</div>

CY2015Q4

mbi

Derivative Liability Counterparty Netting

DerivativeLiabilityCounterpartyNetting

1000000

USD

CY2015Q4

us-gaap

Long Term Debt Noncurrent

LongTermDebtNoncurrent

1908000000

USD

CY2015Q4

mbi

Other Liabilities And Derivative Liabilities Vie After Counterparty Netting And Embedded Reclass

OtherLiabilitiesAndDerivativeLiabilitiesVieAfterCounterpartyNettingAndEmbeddedReclass

359000000

USD

CY2014

us-gaap

Available For Sale Securities Gross Realized Gains Losses Sale Proceeds

AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds

757000000

USD

CY2015Q4

mbi

Insurance Loss Recoverable

InsuranceLossRecoverable

577000000

USD

CY2014

mbi

Increase Decrease In Other Net Realized Gains Losses

IncreaseDecreaseInOtherNetRealizedGainsLosses

-25000000

USD

CY2015

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.06

CY2014

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

15000000

USD

CY2015

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

107000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than10 And Within15 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan10AndWithin15YearsFromBalanceSheetDate

175000000

USD

CY2014

us-gaap

Premiums Earned Net

PremiumsEarnedNet

397000000

USD

CY2014Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionAccumulatedLoss

147000000

USD

CY2015Q4

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

3038000000

USD

CY2015

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

164869788

shares

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

36000000

USD

CY2015Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-61000000

USD

CY2014

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

144000000

USD

CY2014

us-gaap

Increase Decrease In Loss And Loss Adjustment Expense Reserve

IncreaseDecreaseInLossAndLossAdjustmentExpenseReserve

133000000

USD

CY2014

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

641000000

USD

CY2015

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-371000000

USD

CY2014

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

66000000

USD

CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability

850000000

USD

CY2015

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Change In Discount Rate

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesChangeInDiscountRate

-1000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

172000000

USD

CY2014

us-gaap

Net Cash Provided By Used In Investing Activities Continuing Operations

NetCashProvidedByUsedInInvestingActivitiesContinuingOperations

812000000

USD

CY2015

us-gaap

Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period

InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod

P7Y4M24D

CY2014

mbi

Transfers Into Level Three

TransfersIntoLevelThree

240000000

USD

CY2014Q4

mbi

Available For Sale Cumulative Other Than Temporary Impairment Of Securities

AvailableForSaleCumulativeOtherThanTemporaryImpairmentOfSecurities

90000000

USD

CY2013

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

122000000

USD

CY2015

mbi

Unvested Restricted Stock And Units That Receive Nonforfeitable Dividends Or Dividend Equivalents That Have Met Service Condition

UnvestedRestrictedStockAndUnitsThatReceiveNonforfeitableDividendsOrDividendEquivalentsThatHaveMetServiceCondition

617909

shares

CY2013

mbi

Proceeds From Sales Maturities Prepayments And Calls Of Other Investments

ProceedsFromSalesMaturitiesPrepaymentsAndCallsOfOtherInvestments

0

USD

CY2015Q4

us-gaap

Operating Loss Carryforwards

OperatingLossCarryforwards

2800000000

USD

CY2013

us-gaap

Premiums Written Net

PremiumsWrittenNet

-41000000

USD

CY2015Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

6.3703

CY2014

mbi

Realized Gains Losses And Other Settlements On Insured Derivatives Total

RealizedGainsLossesAndOtherSettlementsOnInsuredDerivativesTotal

-30000000

USD

CY2015

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

-525000000

USD

CY2015Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

522000000

USD

CY2014Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Fair Value

AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerFairValue

1220000000

USD

CY2015

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.06

CY2014

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationNetOfTax

-4000000

USD

CY2015Q4

us-gaap

Variable Interest Entity Consolidated Carrying Amount Assets

VariableInterestEntityConsolidatedCarryingAmountAssets

5400000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Two And Within Three Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate

149000000

USD

CY2013

mbi

Segment Expense

SegmentExpense

793000000

USD

CY2015

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

-49000000

USD

CY2015

us-gaap

Premiums Earned Net

PremiumsEarnedNet

372000000

USD

CY2015

mbi

Transfers Into Level Two

TransfersIntoLevelTwo

126000000

USD

CY2014Q4

us-gaap

Liabilities Fair Value Disclosure Recurring

LiabilitiesFairValueDisclosureRecurring

3463000000

USD

CY2015

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

11000000

USD

CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue

167000000

USD

CY2013

mbi

Proceeds From Reinsurance And Recoveries

ProceedsFromReinsuranceAndRecoveries

2621000000

USD

CY2014

mbi

Expense From Transactions With Other Operating Segments Of Same Entity

ExpenseFromTransactionsWithOtherOperatingSegmentsOfSameEntity

0

USD

CY2015

us-gaap

Revenues

853000000

USD

CY2014Q4

us-gaap

Derivative Assets Liabilities At Fair Value Net

DerivativeAssetsLiabilitiesAtFairValueNet

244000000

USD

CY2014

us-gaap

Payments To Acquire Property Plant And Equipment

PaymentsToAcquirePropertyPlantAndEquipment

13000000

USD

CY2013

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

2397000000

USD

CY2015Q4

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

26000000

USD

CY2013

us-gaap

Fees And Commissions Other

FeesAndCommissionsOther

2000000

USD

CY2015

us-gaap

Nature Of Operations

NatureOfOperations

<div>Note 1: Business Developments and Risks and UncertaintiesSummaryMBIA Inc., together with its consolidated subsidiaries, (collectively, “MBIA” or the “Company”) operates one of the largest financial guarantee insurance businesses in the industry. MBIA manages three operating segments: 1) United States (“U.S.”) public finance insurance; 2) international and structured finance insurance; and 3) corporate. The Company’s U.S. public finance insurance business is primarily operated through National Public Finance Guarantee Corporation (“National”) and its international and structured finance insurance business is primarily operated through MBIA Insurance Corporation and its subsidiaries (“MBIA Corp.”). Unless otherwise indicated or the context otherwise requires, references to “MBIA Corp.” are to MBIA Insurance Corporation, together with its subsidiaries, MBIA UK Insurance Limited (“MBIA UK”) and MBIA Mexico S.A. de C.V (“MBIA Mexico”). Prior to 2015, MBIA managed two other operating segments, advisory services and conduit. The advisory services segment was primarily operated through Cutwater Holdings, LLC and its subsidiaries (“Cutwater”). Effective on January 1, 2015, the Company exited its advisory services business through the sale of Cutwater. During the second quarter of 2014, the Company dissolved its conduit segment through the liquidation of Meridian Funding Company, LLC (“Meridian”). Refer to “Note 12: Business Segments” for further information about the Company’s operating segments.Business DevelopmentsNational Ratings and New Business OpportunitiesNational’s ability to write new business and compete with other financial guarantors is largely dependent on the financial strength ratings assigned to National by the rating agencies. As of December 31, 2015, the rating agencies affirmed the following ratings of National: AA+ with a stable outlook by Kroll Bond Rating Agency; AA- with a stable outlook by Standard & Poor’s Financial Services LLC (“S&P”); and A3 with a negative outlook by Moody’s Investors Service, Inc. (“Moody’s”). National seeks to generate shareholder value through appropriate risk adjusted pricing; however, current market conditions and the competitive landscape may limit National’s new business opportunities and its abilities to price and underwrite risk with attractive returns. Refer to “Risks and Uncertainties” below for a discussion of business risks related to National’s insured portfolio.Sale of MBIA Inc. Common StockDuring the year ended December 31, 2015, certain investment funds affiliated with Warburg Pincus LLC (“Warburg”) sold all of their 45.7 million shares of MBIA Inc. common stock. At the time of each sale, Warburg was the largest holder of the Company’s common stock. Warburg received all of the net proceeds from this offering. In connection with the sales, National and the Company repurchased 8 million shares and 7.6 million shares, respectively.Held For Sale ClassificationsArmonk, New York FacilityDuring the year ended December 31, 2015, the Company sold its Armonk, New York facility and recorded an impairment charge of $4 million to adjust the carrying amount to the sale price less costs to sell. The impairment charge was reflected in the results of the Company’s U.S. public finance insurance segment and included in “Other net realized gains (losses)” on the Company’s consolidated statements of operations. CutwaterAs a result of the agreement to sell Cutwater, the assets and liabilities of Cutwater were classified as held for sale as of December 31, 2014 and presented within “Assets held for sale” and “Liabilities held for sale” on the Company’s consolidated balance sheet and measured at the lower of its carrying value or fair value less costs to sell. The Company completed this sale effective January 1, 2015, and recorded a gain of approximately $24 million. This gain was reflected in the results of the Company’s corporate segment and included in “Other net realized gains (losses)” on the Company’s consolidated statements of operations. Assets and Liabilities Held for Sale by Major CategoryAs of December 31, 2015, there are no assets and liabilities held for sale on the Company’s consolidated balance sheet. The following table summarizes the components of assets and liabilities held for sale as of December 31, 2014:</div><div><table style='border-collapse:collapse;' ><tr style='height:9.75pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ></td><td style='width:15pt;text-align:center;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:left;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:left;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:center;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:9.75pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td colspan='3' rowspan='1' style='width:258.75pt;border-bottom-style:solid;border-bottom-width:1;text-align:left;border-color:Black;min-width:258.75pt;' >In millions</td><td style='width:15pt;text-align:center;border-color:Black;min-width:15pt;' ></td><td colspan='2' rowspan='1' style='width:105pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;border-color:Black;min-width:105pt;' >December 31, 2014</td><td style='width:49.5pt;text-align:center;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td colspan='3' rowspan='1' style='width:258.75pt;border-top-style:solid;border-top-width:1;text-align:left;border-color:Black;min-width:258.75pt;' >Assets</td><td style='width:15pt;text-align:left;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:solid;border-top-width:1;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;border-top-style:solid;border-top-width:1;text-align:left;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' >Investments carried at fair value</td><td style='width:15pt;text-align:left;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' >$</td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >6</td><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' >Cash and cash equivalents</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:left;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >15</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' >Facility</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:left;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >26</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' >Other assets</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >4</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' >Assets of consolidated variable interest entities:</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' >Cash</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >40</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' >Loans receivable at fair value</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-bottom-style:solid;border-bottom-width:1;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;border-bottom-style:solid;border-bottom-width:1;text-align:right;border-color:Black;min-width:97.5pt;' >711</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' > Total assets held for sale</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:center;border-color:Black;min-width:7.5pt;' >$</td><td style='width:97.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:right;border-color:Black;min-width:97.5pt;' >802</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:5.25pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' ></td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:double;border-top-width:3;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;border-top-style:double;border-top-width:3;text-align:right;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td colspan='3' rowspan='1' style='width:258.75pt;text-align:left;border-color:Black;min-width:258.75pt;' >Liabilities</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' >Other liabilities </td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' >$</td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >18</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td colspan='2' rowspan='1' style='width:242.25pt;text-align:left;border-color:Black;min-width:242.25pt;' >Liabilities of consolidated variable interest entities:</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:left;border-color:Black;min-width:97.5pt;' ></td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' >Variable interest entity notes</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >431</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' >Payable for loans purchased</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;text-align:center;border-color:Black;min-width:7.5pt;' ></td><td style='width:97.5pt;text-align:right;border-color:Black;min-width:97.5pt;' >323</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr><tr style='height:12pt;' ><td style='width:49.5pt;text-align:left;border-color:Black;min-width:49.5pt;' ></td><td style='width:16.5pt;text-align:left;border-color:Black;min-width:16.5pt;' ></td><td style='width:15.75pt;text-align:left;border-color:Black;min-width:15.75pt;' ></td><td style='width:226.5pt;text-align:left;border-color:Black;min-width:226.5pt;' > Total liabilities held for sale</td><td style='width:15pt;text-align:right;border-color:Black;min-width:15pt;' ></td><td style='width:7.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:center;border-color:Black;min-width:7.5pt;' >$</td><td style='width:97.5pt;border-top-style:solid;border-top-width:1;border-bottom-style:double;border-bottom-width:3;text-align:right;border-color:Black;min-width:97.5pt;' >772</td><td style='width:49.5pt;text-align:right;border-color:Black;min-width:49.5pt;' ></td></tr></table></div><div>Risks and UncertaintiesThe Company’s financial statements include estimates and assumptions that affect the reported amounts of assets, liabilities, revenues and expenses. The outcome of certain significant risks and uncertainties could cause the Company to revise its estimates and assumptions or could cause actual results to differ from the Company’s estimates. The discussion below highlights the significant risks and uncertainties that could have a material effect on the Company’s financial statements and business objectives in future periods. U.S. Public Finance Market ConditionsNational’s insured portfolio continued to perform satisfactorily against a backdrop of strengthening domestic economic activity. While a stable or growing economy will generally benefit tax revenues and fees charged for essential municipal services which secure National’s insured bond portfolio, some state and local governments and territory obligors National insures remain under financial and budgetary stress. This could lead to an increase in defaults by such entities on the payment of their obligations and losses or impairments on a greater number of the Company’s insured transactions. The Company monitors and analyzes these situations and other stressed credits closely, and the overall extent and duration of this stress is uncertain. Puerto Rico is experiencing fiscal stress and constrained liquidity due to, among other things, Puerto Rico’s structural budget imbalance, limited access to the capital markets, a stagnating local economy, net migration of people out of Puerto Rico and a high debt burden. Although Puerto Rico has tried to address its significant financial challenges through various fiscal policies and by the passage of a balanced general fund budget, it continues to experience significant fiscal stress. The Company continues to believe, based on its analysis of Puerto Rico’s fiscal and structural circumstances, the details of its insured exposures, and its legal and contractual rights, that all of National’s insured Puerto Rico related debt will ultimately be substantially repaid. In addition, in December of 2015, National and other stakeholders entered into a restructuring support agreement with Puerto Rico Electric Power Authority (“PREPA”) addressing, among other things, the treatment of approximately $8.1 billion of outstanding PREPA bonds, including approximately $1.4 billion of PREPA bonds insured by National.MBIA Corp. Recoveries and Insured PortfolioMBIA Corp.’s primary focus is the collection of excess spread and put-back recoveries and loss mitigation, primarily through remediation of stressed credits including through commutations of insurance policies. The amount and timing of projected collections from excess spread from second-lien residential mortgage-backed securities (“RMBS”) and the put-back recoverable from Credit Suisse Securities (USA) LLC, DLJ Mortgage Capital, Inc., and Select Portfolio Servicing Inc. (collectively, “Credit Suisse”) are uncertain. Refer to “Note 6: Loss and Loss Adjustment Expense Reserves” for information about MBIA Corp.’s loss reserves and recoveries. Further, the remaining insured portfolio, aside from these exposures, could deteriorate and result in additional significant loss reserves and claim payments. MBIA Corp.’s ability to meet its obligations is limited by available liquidity and its ability to secure liquidity through financing transactions, therefore, there can be no assurance that MBIA Corp. will be successful in generating sufficient cash to meet its obligations. In particular, MBIA Corp. insures $776 million of gross par outstanding, as of February of 2016, of notes issued by Zohar II 2005-1, a high yield corporate collateralized debt obligations (“CDO”), which matures in January of 2017. If cash flows generated by this high yield corporate CDO are insufficient to pay the insured amount in full, MBIA Corp. will be called upon to make the unpaid insured amount at maturity. Unless a substantial amount of the insured exposure is paid at maturity, or if MBIA Corp. is unsuccessful at reaching an agreed upon restructuring of the insured exposure, MBIA Corp. may ultimately have insufficient resources to continue to pay claims. Such failure could cause the New York State Department of Financial Services (“NYSDFS”) to put MBIA Insurance Corporation, exclusive of MBIA UK and MBIA Mexico, into a rehabilitation or liquidation proceeding or to order MBIA Corp. to cease paying any claims under its policies. Given the separation of MBIA Inc. and MBIA Corp. as distinct legal entities, the absence of any material intercompany lending agreements or cross defaults between the entities, and the lack of reliance by MBIA Inc. on MBIA Corp. for the receipt of dividends, the Company does not believe that a rehabilitation or liquidation proceeding of MBIA Insurance Corporation by the NYSDFS would have any significant long-term liquidity impact on MBIA Inc. or result in a liquidation or similar proceeding of MBIA UK or MBIA Mexico. Such a proceeding could have material adverse consequences for MBIA Corp., including the termination of insured credit default swap (“CDS”) contracts for which counterparties may assert market-based claims, the acceleration of debt obligations issued by affiliates and insured by MBIA Corp., the loss of control of MBIA Insurance Corporation to a rehabilitator or liquidator, and unplanned costs. Corporate Liquidity As of December 31, 2015 and 2014, the liquidity position of MBIA Inc. was $416 million and $498 million, respectively. The term “liquidity position” refers to cash and liquid assets available for general liquidity purposes. During the year ended December 31, 2015, $228 million was released to MBIA Inc. under the MBIA group’s tax sharing agreement (the “Tax Escrow Account”) and National declared and paid a dividend of $114 million to its ultimate parent, MBIA Inc. Subsequent to December 31, 2015, an additional $105 million was released to MBIA Inc. from the Tax Escrow Account. Based on the Company’s projections of National’s dividends, payments into the Tax Escrow Account, and other cash inflows, the Company expects that MBIA Inc. will have sufficient cash to satisfy its debt service and general corporate needs. However, MBIA Inc. continues to have liquidity risk which could be triggered by deterioration in the performance of invested assets, interruption of or reduction in dividends or tax payments received from operating subsidiaries, impaired access to the capital markets, as well as other factors which cannot be anticipated at this time. Furthermore, failure by MBIA Inc. to settle liabilities that are also insured by MBIA Corp. could result in claims on MBIA Corp.</div>

CY2015

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

16000000

USD

CY2015Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

281833618

shares

CY2015Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

10000000

shares

CY2013

us-gaap

Premiums Earned Net

PremiumsEarnedNet

457000000

USD

CY2013

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents Continuing Operations

EffectOfExchangeRateOnCashAndCashEquivalentsContinuingOperations

11000000

USD

CY2015

us-gaap

Gain Loss On Derivative Instruments Net Pretax

GainLossOnDerivativeInstrumentsNetPretax

129000000

USD

CY2013

mbi

Gross Premium Earned Financial Guarantee Insurance Contracts

GrossPremiumEarnedFinancialGuaranteeInsuranceContracts

467000000

USD

CY2015

us-gaap

Payments For Repurchase Of Common Stock

PaymentsForRepurchaseOfCommonStock

303000000

USD

CY2014Q4

us-gaap

Participating Policies As Percentage Of Gross Insurance In Force

ParticipatingPoliciesAsPercentageOfGrossInsuranceInForce

1

pure

CY2014

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

526000000

USD

CY2014

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesBeforeTax

-6000000

USD

CY2015

mbi

Proceeds From Sales Maturities And Paydowns Of Fair Value And Trading Securities

ProceedsFromSalesMaturitiesAndPaydownsOfFairValueAndTradingSecurities

551000000

USD

CY2013

us-gaap

Available For Sale Securities Gross Realized Gains Losses Sale Proceeds

AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds

1726000000

USD

CY2015

us-gaap

Payments For Operating Activities

PaymentsForOperatingActivities

130000000

USD

CY2013

us-gaap

Proceeds From Insurance Settlement Operating Activities

ProceedsFromInsuranceSettlementOperatingActivities

0

USD

CY2015

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesBeforeTax

-3000000

USD

CY2014Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

10.9888

CY2014

us-gaap

Revenues

1270000000

USD

CY2013

mbi

Proceeds From Sales Maturities And Paydowns Of Fair Value And Trading Securities

ProceedsFromSalesMaturitiesAndPaydownsOfFairValueAndTradingSecurities

595000000

USD

CY2014Q4

mbi

Preferred Stock Of Subsidiary And Noncontrolling Interest Value

PreferredStockOfSubsidiaryAndNoncontrollingInterestValue

21000000

USD

CY2014

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax

-27000000

USD

CY2014

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

171000000

USD

CY2015

us-gaap

Fair Value Adjustment Of Warrants

FairValueAdjustmentOfWarrants

0

USD

CY2015

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Net Of Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesNetOfTax

-3000000

USD

CY2014

us-gaap

Incremental Common Shares Attributable To Share Based Payment Arrangements

IncrementalCommonSharesAttributableToShareBasedPaymentArrangements

1104247

shares

CY2015

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

238000000

USD

CY2014

us-gaap

Interest Expense

InterestExpense

210000000

USD

CY2015Q4

us-gaap

Assets Of Disposal Group Including Discontinued Operation Current

AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent

0

USD

CY2013

us-gaap

Other Income

OtherIncome

-29000000

USD

CY2014

mbi

Transfers Out Of Level Two

TransfersOutOfLevelTwo

240000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than Three And Within Four Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate

138000000

USD

CY2015

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax

-27000000

USD

CY2013

us-gaap

Adjustments To Additional Paid In Capital Tax Effect From Share Based Compensation

AdjustmentsToAdditionalPaidInCapitalTaxEffectFromShareBasedCompensation

4000000

USD

CY2015Q4

us-gaap

Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2015Q4

mbi

Number Of Other Lawsuits

NumberOfOtherLawsuits

0

Lawsuits

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability

-71000000

USD

CY2013Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

1051000000

USD

CY2015

mbi

Transfers Into Level Three

TransfersIntoLevelThree

43000000

USD

CY2015Q4

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

1

CY2014

us-gaap

Repayments Of Medium Term Notes

RepaymentsOfMediumTermNotes

168000000

USD

CY2015

mbi

Segment Expense

SegmentExpense

564000000

USD

CY2014Q4

mbi

Approximate Percentage Of Level3 Assets At Fair Value In Total Assets Measured At Fair Value

ApproximatePercentageOfLevel3AssetsAtFairValueInTotalAssetsMeasuredAtFairValue

0.2

pure

CY2015Q4

us-gaap

Stockholders Equity

StockholdersEquity

3729000000

USD

CY2014

mbi

Transfers Into And Out Of Level One

TransfersIntoAndOutOfLevelOne

0

USD

CY2015

dei

Trading Symbol

TradingSymbol

MBI

CY2015

us-gaap

Undistributed Earnings Loss Allocated To Participating Securities Diluted

UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

6000000

USD

CY2015Q4

mbi

Reinsurance Recoverable On Unpaid Loss Adjustment Expenses

ReinsuranceRecoverableOnUnpaidLossAdjustmentExpenses

0

USD

CY2014

mbi

Transfers Into Level Two

TransfersIntoLevelTwo

140000000

USD

CY2014Q4

mbi

Reinsurance Recoverable On Unpaid Loss Adjustment Expenses

ReinsuranceRecoverableOnUnpaidLossAdjustmentExpenses

1000000

USD

CY2013

us-gaap

Unrecognized Tax Benefits Increases Resulting From Prior Period Tax Positions

UnrecognizedTaxBenefitsIncreasesResultingFromPriorPeriodTaxPositions

18000000

USD

CY2015Q4

us-gaap

Treasury Stock Value

TreasuryStockValue

2668000000

USD

CY2015

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows

0

USD

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Unearned Premium Revenue

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue

98000000

USD

CY2014

mbi

Unvested Restricted Stock And Units That Receive Nonforfeitable Dividends Or Dividend Equivalents That Have Met Service Condition

UnvestedRestrictedStockAndUnitsThatReceiveNonforfeitableDividendsOrDividendEquivalentsThatHaveMetServiceCondition

412769

shares

CY2013

us-gaap

Repayments Of Medium Term Notes

RepaymentsOfMediumTermNotes

197000000

USD

CY2014

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

-515000000

USD

CY2015

us-gaap

Payments To Acquire Loans Receivable

PaymentsToAcquireLoansReceivable

0

USD

CY2015Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

50000000

USD

CY2015

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

32000000

USD

CY2015

mbi

Payments For Net Realized Losses On Insured Derivatives Paid

PaymentsForNetRealizedLossesOnInsuredDerivativesPaid

42000000

USD

CY2015

dei

Entity Current Reporting Status

EntityCurrentReportingStatus

Yes

CY2015

mbi

Payments For Deconsolidation Of Variable Interest Entity

PaymentsForDeconsolidationOfVariableInterestEntity

0

USD

CY2014

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

-6000000

USD

CY2013Q4

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLosses

900000000

USD

CY2014

mbi

Revenues Of Consolidated Vies

RevenuesOfConsolidatedVies

101000000

USD

CY2014Q4

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

1

CY2015Q4

mbi

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Sixth Through Tenth Year Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringSixthThroughTenthYearFollowingBalanceSheetDate

486000000

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CY2013

us-gaap

Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations

UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations

0

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CY2013

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax

5000000

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CY2014

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

240000000

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CY2014

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

484000000

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CY2014Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

1

CY2014Q4

mbi

Number Of Policies

NumberOfPolicies

315

CY2013

us-gaap

Incremental Common Shares Attributable To Call Options And Warrants

IncrementalCommonSharesAttributableToCallOptionsAndWarrants

0

shares

CY2015Q4

mbi

Aggregate Principal Amount In Excess Of Failureto Make Payment At Maturity

AggregatePrincipalAmountInExcessOfFailuretoMakePaymentAtMaturity

10000000

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CY2014

mbi

Segment Expense

SegmentExpense

629000000

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CY2015Q4

us-gaap

Liabilities

11114000000

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CY2013

us-gaap

Stock Issued During Period Shares Stock Options Exercised

StockIssuedDuringPeriodSharesStockOptionsExercised

0

shares

CY2015Q4

us-gaap

Summary Of Investments Other Than Investments In Related Parties Carrying Amount

SummaryOfInvestmentsOtherThanInvestmentsInRelatedPartiesCarryingAmount

6350000000

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CY2015Q4

mbi

Fair Value Of Credit Support Annexes

FairValueOfCreditSupportAnnexes

3000000

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CY2014

us-gaap

Other Income

OtherIncome

28000000

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CY2015Q4

us-gaap

Held To Maturity Securities Fair Value

HeldToMaturitySecuritiesFairValue

2401000000

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CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability

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CY2013

us-gaap

Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price

ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

16.3382

CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Interest

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest

4620000000

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CY2015

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

7000000

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CY2015Q4

mbi

Impact Of Non Performance Risk On Insured Derivative Liability

ImpactOfNonPerformanceRiskOnInsuredDerivativeLiability

99000000

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CY2014

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesBeforeTax

-85000000

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CY2014Q4

us-gaap

Liabilities Of Disposal Group Including Discontinued Operation

LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

772000000

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CY2015

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

-53000000

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CY2014Q4

us-gaap

Surplus Notes

SurplusNotes

940000000

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CY2014

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax

-40000000

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CY2014

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses After Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesAfterTax

-54000000

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CY2014

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

1000000

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CY2013Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

3715406

shares

CY2015

us-gaap

Payments To Acquire Property Plant And Equipment

PaymentsToAcquirePropertyPlantAndEquipment

3000000

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CY2013

us-gaap

Gain Loss On Derivative Instruments Net Pretax

GainLossOnDerivativeInstrumentsNetPretax

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CY2013

us-gaap

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax

13000000

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CY2013

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

0

USD

CY2014

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows

1000000

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CY2015Q4

mbi

Preferred Stock Of Subsidiary And Noncontrolling Interest Value

PreferredStockOfSubsidiaryAndNoncontrollingInterestValue

12000000

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CY2014Q4

us-gaap

Reinsurance Receivables Case Basis

ReinsuranceReceivablesCaseBasis

7000000

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CY2014

mbi

Number Of Variable Interest Entities Consolidated

NumberOfVariableInterestEntitiesConsolidated

3

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CY2015

dei

Document Fiscal Year Focus

DocumentFiscalYearFocus

2015

CY2014Q4

us-gaap

Reinsurance Receivables Incurred But Not Reported Claims

ReinsuranceReceivablesIncurredButNotReportedClaims

6000000

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CY2014

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

0

USD

CY2014

us-gaap

Payments To Acquire Loans Receivable

PaymentsToAcquireLoansReceivable

310000000

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CY2013

us-gaap

Proceeds From Sale And Collection Of Loans Receivable

ProceedsFromSaleAndCollectionOfLoansReceivable

280000000

USD

CY2015

mbi

Segment Pretax Income Loss

SegmentPretaxIncomeLoss

289000000

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CY2014

us-gaap

Other Noncash Income Expense

OtherNoncashIncomeExpense

-114000000

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CY2014

us-gaap

Proceeds From Insurance Settlement Operating Activities

ProceedsFromInsuranceSettlementOperatingActivities

30000000

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CY2015

us-gaap

Payments For Proceeds From Derivative Instrument Investing Activities

PaymentsForProceedsFromDerivativeInstrumentInvestingActivities

-13000000

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CY2015

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax

-80000000

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CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Second Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringSecondQuarterFollowingBalanceSheetDate

47000000

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CY2013

us-gaap

Selling General And Administrative Expense

SellingGeneralAndAdministrativeExpense

384000000

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CY2015Q4

us-gaap

Reinsurance Payable

ReinsurancePayable

38000000

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CY2014Q4

mbi

Derivative Fair Value Of Derivative Asset Net Of Counterparty Netting

DerivativeFairValueOfDerivativeAssetNetOfCounterpartyNetting

10000000

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CY2015Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

3741000000

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CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Premium Expected To Be Collected

FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollected

952000000

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CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding

15883000000

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CY2014Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Net Discount

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityNetDiscount

14000000

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CY2014Q4

mbi

Derivative Asset Counterparty Netting Amount Fair Value

DerivativeAssetCounterpartyNettingAmountFairValue

81000000

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CY2014Q4

us-gaap

Variable Interest Entity Consolidated Carrying Amount Assets

VariableInterestEntityConsolidatedCarryingAmountAssets

5000000000

USD

CY2015

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

10000000

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CY2015

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

0

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CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than Five And Within10 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFiveAndWithin10YearsFromBalanceSheetDate

250000000

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CY2015Q4

us-gaap

Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Intrinsic Value1

SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1

4000000

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CY2015

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

17967871

shares

CY2015Q4

mbi

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During Sixteenth Year And Thereafter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringSixteenthYearAndThereafterFollowingBalanceSheetDate

254000000

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CY2015

us-gaap

Net Cash Provided By Used In Investing Activities Continuing Operations

NetCashProvidedByUsedInInvestingActivitiesContinuingOperations

817000000

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CY2015Q4

mbi

Derivative Fair Value Of Derivative Liability Net Of Counterparty Netting

DerivativeFairValueOfDerivativeLiabilityNetOfCounterpartyNetting

374000000

USD

CY2013

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

400000000

USD

CY2013

us-gaap

Ceded Premiums Written

CededPremiumsWritten

2000000

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CY2015Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

HeldToMaturitySecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

295000000

USD

CY2014

us-gaap

Net Income Loss Available To Common Stockholders Basic

NetIncomeLossAvailableToCommonStockholdersBasic

553000000

USD

CY2015

us-gaap

Incremental Common Shares Attributable To Call Options And Warrants

IncrementalCommonSharesAttributableToCallOptionsAndWarrants

0

shares

CY2014

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

188171503

shares

CY2014Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

2548000

shares

CY2015

mbi

Payments To Acquire Fair Value Option And Trading Securities

PaymentsToAcquireFairValueOptionAndTradingSecurities

390000000

USD

CY2014

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Change In Discount Rate

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesChangeInDiscountRate

33000000

USD

CY2008Q1

us-gaap

Surplus Notes

SurplusNotes

1000000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Fourth Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringFourthQuarterFollowingBalanceSheetDate

21000000

USD

CY2015

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

800000000

USD

CY2013

mbi

Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale And For Writedown Of Securities Before Tax

OtherComprehensiveIncomeLossReclassificationAdjustmentFromAociForSaleAndForWritedownOfSecuritiesBeforeTax

5000000

USD

CY2014

mbi

Other Comprehensive Income Unrealized Holding Gain Loss Arising During Period On Securities With Other Than Temporary Impairment Losses Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossArisingDuringPeriodOnSecuritiesWithOtherThanTemporaryImpairmentLossesTax

-31000000

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CY2015

dei

Entity Central Index Key

EntityCentralIndexKey

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CY2013

us-gaap

Net Income Loss Available To Common Stockholders Diluted

NetIncomeLossAvailableToCommonStockholdersDiluted

245000000

USD

CY2015

us-gaap

Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1

FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1

P9Y0M29D

CY2015

us-gaap

Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax

OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax

-40000000

USD

CY2015

us-gaap

Other Noncash Income Expense

OtherNoncashIncomeExpense

-38000000

USD

CY2015

us-gaap

Other Income

OtherIncome

17000000

USD

CY2015

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

564000000

USD

CY2015Q4

us-gaap

Liabilities Fair Value Disclosure Recurring

LiabilitiesFairValueDisclosureRecurring

2918000000

USD

CY2015Q4

us-gaap

Assets

14855000000

USD

CY2014

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Accretion Of Recoveries

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesAccretionOfRecoveries

17000000

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CY2014Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

0

USD

CY2015

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

157000000

USD

CY2015

us-gaap

Disposal Date1

DisposalDate1

2015-01-01

CY2015Q4

mbi

Financial Guarantee Insurance Contracts Premium Expected To Be Collected During Twenty First Year And Thereafter From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringTwentyFirstYearAndThereafterFromBalanceSheetDate

175000000

USD

CY2015Q4

us-gaap

Liabilities Of Disposal Group Including Discontinued Operation

LiabilitiesOfDisposalGroupIncludingDiscontinuedOperation

0

USD

CY2014

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

31907852

shares

CY2015

mbi

Transfers Out Of Level Two

TransfersOutOfLevelTwo

43000000

USD

CY2013

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

57000000

USD

CY2014

mbi

Increase Decrease In Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange

IncreaseDecreaseInNetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange

128000000

USD

CY2015

mbi

Revenues Of Consolidated Vies

RevenuesOfConsolidatedVies

128000000

USD

CY2015

mbi

Collections For Cases With Recoveries

CollectionsForCasesWithRecoveries

74000000

USD

CY2014

mbi

Proceeds From Reinsurance And Recoveries

ProceedsFromReinsuranceAndRecoveries

131000000

USD

CY2013

us-gaap

Net Cash Provided By Used In Operating Activities Continuing Operations

NetCashProvidedByUsedInOperatingActivitiesContinuingOperations

1829000000

USD

CY2013

us-gaap

Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

-137000000

USD

CY2015Q4

mbi

Investment Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions For Continuous Twelve Month Period

InvestmentSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsForContinuousTwelveMonthPeriod

65

security

CY2015Q4

us-gaap

Surplus Notes

SurplusNotes

940000000

USD

CY2014

us-gaap

Gain Loss On Derivative Instruments Net Pretax

GainLossOnDerivativeInstrumentsNetPretax

459000000

USD

CY2015

us-gaap

Undistributed Earnings Loss Allocated To Participating Securities Basic

UndistributedEarningsLossAllocatedToParticipatingSecuritiesBasic

6000000

USD

CY2015Q4

us-gaap

Common Stock Value

CommonStockValue

282000000

USD

CY2014Q4

us-gaap

Common Stock Value

CommonStockValue

281000000

USD

CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Number Of Contracts Issued And Outstanding

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding

140

CY2015

mbi

Number Of Credit Support Annexes

NumberOfCreditSupportAnnexes

1

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CY2015

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

1145000000

USD

CY2013

us-gaap

Proceeds From Issuance Of Other Long Term Debt

ProceedsFromIssuanceOfOtherLongTermDebt

31000000

USD

CY2014

mbi

Payments To Acquire Fair Value Option And Trading Securities

PaymentsToAcquireFairValueOptionAndTradingSecurities

631000000

USD

CY2015Q4

us-gaap

Held To Maturity Securities Accumulated Unrecognized Holding Loss

HeldToMaturitySecuritiesAccumulatedUnrecognizedHoldingLoss

312000000

USD

CY2014

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Change In Assumptions

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesChangeInAssumptions

-156000000

USD

CY2014

mbi

Revenue From Transactions With Other Operating Segments Of Same Entity

RevenueFromTransactionsWithOtherOperatingSegmentsOfSameEntity

0

USD

CY2015Q4

us-gaap

Held To Maturity Securities Continuous Unrealized Loss Position Less Than Twelve Months Fair Value

HeldToMaturitySecuritiesContinuousUnrealizedLossPositionLessThanTwelveMonthsFairValue

1093000000

USD

CY2014Q4

mbi

Fair Value Of Credit Support Annexes

FairValueOfCreditSupportAnnexes

2000000

USD

CY2014

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-421000000

USD

CY2013

mbi

Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange

NetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange

69000000

USD

CY2015

us-gaap

Net Income Loss

NetIncomeLoss

180000000

USD

CY2014Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

145000000

USD

CY2013

mbi

Segment Pretax Income Loss

SegmentPretaxIncomeLoss

416000000

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CY2015Q4

us-gaap

Preferred Stock Value

PreferredStockValue

0

USD

CY2014

us-gaap

Proceeds From Issuance Of Other Long Term Debt

ProceedsFromIssuanceOfOtherLongTermDebt

30000000

USD

CY2015Q4

mbi

Percentage Of Securities Book Value Exceeded Market Value

PercentageOfSecuritiesBookValueExceededMarketValue

0.05

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CY2013

us-gaap

Net Cash Provided By Used In Investing Activities Continuing Operations

NetCashProvidedByUsedInInvestingActivitiesContinuingOperations

-6000000

USD

CY2015

us-gaap

Interest Expense

InterestExpense

199000000

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CY2015Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Insured Contractual Payments Outstanding Principal

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal

11160000000

USD

CY2015

mbi

Vie Interest Net

VieInterestNet

71000000

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CY2013

us-gaap

Interest Expense

InterestExpense

236000000

USD

CY2015Q4

us-gaap

Available For Sale Securities Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss

AvailableForSaleSecuritiesContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

136000000

USD

CY2013

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

-142000000

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CY2015Q4

us-gaap

Security Owned And Pledged As Collateral Fair Value

SecurityOwnedAndPledgedAsCollateralFairValue

457000000

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CY2014Q4

us-gaap

Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2015

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Change In Assumptions

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesChangeInAssumptions

94000000

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CY2015

us-gaap

Number Of Operating Segments

NumberOfOperatingSegments

3

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CY2015

us-gaap

Proceeds From Issuance Of Other Long Term Debt

ProceedsFromIssuanceOfOtherLongTermDebt

24000000

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CY2013

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

3000000

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CY2014Q4

mbi

Investment Securities In Unrealized Loss Positions Qualitative Disclosure Number Of Positions For Continuous Twelve Month Period

InvestmentSecuritiesInUnrealizedLossPositionsQualitativeDisclosureNumberOfPositionsForContinuousTwelveMonthPeriod

143

security

CY2013

mbi

Expenses Of Consolidated Vies

ExpensesOfConsolidatedVies

56000000

USD

CY2013

us-gaap

Interest Paid Net

InterestPaidNet

224000000

USD

CY2014

mbi

Transfers Out Of Level Three

TransfersOutOfLevelThree

140000000

USD

CY2013

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-176000000

USD

CY2013

mbi

Proceeds From Consolidation Of Variable Interest Entity

ProceedsFromConsolidationOfVariableInterestEntity

0

USD

CY2015

mbi

Insurance Loss Recoverable And Changes In Recoveries Of Unpaid Losses Accretion Of Recoveries

InsuranceLossRecoverableAndChangesInRecoveriesOfUnpaidLossesAccretionOfRecoveries

10000000

USD

CY2014

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

190898627

shares

CY2014

us-gaap

Payments For Proceeds From Derivative Instrument Investing Activities

PaymentsForProceedsFromDerivativeInstrumentInvestingActivities

26000000

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CY2014Q4

us-gaap

Available For Sale Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

147000000

USD

CY2015Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized During First Quarter Following Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFirstQuarterFollowingBalanceSheetDate

47000000

USD

CY2014

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

12000000

USD

CY2015

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

9000000

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CY2015

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax

0

USD

CY2015

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax

0

USD

CY2014

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Before Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax

-4000000

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CY2014

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Reclassification Adjustment From Aoci Realized Upon Sale Or Liquidation Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationTax

0

USD

CY2012Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

3194000000

USD

CY2013

us-gaap

Revenues

1209000000

USD

CY2013

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

793000000

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CY2013

us-gaap

Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest

IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest

416000000

USD

CY2013

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

166000000

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CY2013

us-gaap

Net Income Loss

NetIncomeLoss

250000000

USD

CY2013

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

1.3

CY2013

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

1.29

CY2013

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

189071011

shares

CY2013

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

190312913

shares

CY2013

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

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CY2014

us-gaap

Stock Issued During Period Value Share Based Compensation

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CY2012Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

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CY2013Q4

us-gaap

Cash Including Discontinued Operations

CashIncludingDiscontinuedOperations

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CY2013

us-gaap

Increase Decrease In Deferred Policy Acquisition Costs

IncreaseDecreaseInDeferredPolicyAcquisitionCosts

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CY2013

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

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CY2013

us-gaap

Increase Decrease In Loss And Loss Adjustment Expense Reserve

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216000000

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CY2013

mbi

Increase Decrease In Insurance Loss Recoverable

IncreaseDecreaseInInsuranceLossRecoverable

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CY2013

us-gaap

Increase Decrease In Interest Payable Net

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106000000

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CY2013

us-gaap

Increase Decrease In Accrued Liabilities

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43000000

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CY2013

mbi

Net Other Than Temporary Impairments

NetOtherThanTemporaryImpairments

0

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CY2013

mbi

Realized Gains Losses And Other Settlements On Insured Derivatives Total

RealizedGainsLossesAndOtherSettlementsOnInsuredDerivativesTotal

0

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CY2013

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

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CY2013

mbi

Increase Decrease In Net Gains Losses On Financial Instruments At Fair Value And Foreign Exchange

IncreaseDecreaseInNetGainsLossesOnFinancialInstrumentsAtFairValueAndForeignExchange

244000000

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CY2013

mbi

Increase Decrease In Other Net Realized Gains Losses

IncreaseDecreaseInOtherNetRealizedGainsLosses

28000000

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CY2013

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

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CY2013

mbi

Adjustment Gains Losses On Extinguishment Of Debt

AdjustmentGainsLossesOnExtinguishmentOfDebt

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CY2013

mbi

Vie Interest Net

VieInterestNet

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CY2013

us-gaap

Other Noncash Income Expense

OtherNoncashIncomeExpense

-103000000

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CY2013

us-gaap

Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities

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1579000000

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CY2014Q4

us-gaap

Cash Including Discontinued Operations

CashIncludingDiscontinuedOperations

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CY2014

mbi

Proceeds From Sales Maturities Prepayments And Calls Of Other Investments

ProceedsFromSalesMaturitiesPrepaymentsAndCallsOfOtherInvestments

1000000

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CY2015

mbi

Proceeds From Sales Maturities Prepayments And Calls Of Other Investments

ProceedsFromSalesMaturitiesPrepaymentsAndCallsOfOtherInvestments

0

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CY2013

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

0

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CY2015

us-gaap

Proceeds From Notes Payable

ProceedsFromNotesPayable

0

USD

CY2014

us-gaap

Proceeds From Notes Payable

ProceedsFromNotesPayable

79000000

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CY2015Q4

us-gaap

Cash Including Discontinued Operations

CashIncludingDiscontinuedOperations

0

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CY2015

us-gaap

Increase Decrease In Accrued Liabilities

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14000000

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CY2014

us-gaap

Increase Decrease In Accrued Liabilities

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CY2015

mbi

Net Other Than Temporary Impairments

NetOtherThanTemporaryImpairments

13000000

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CY2014

mbi

Net Other Than Temporary Impairments

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15000000

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CY2015

mbi

Adjustment Gains Losses On Extinguishment Of Debt

AdjustmentGainsLossesOnExtinguishmentOfDebt

0

USD

CY2014

mbi

Adjustment Gains Losses On Extinguishment Of Debt

AdjustmentGainsLossesOnExtinguishmentOfDebt

0

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CY2015

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Premium Payments Received

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-98000000

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CY2015

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable New Business Written

FinancialGuaranteeInsuranceContractsPremiumReceivableNewBusinessWritten

5000000

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CY2015

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract

-16000000

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CY2015

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Accretion Of Discount On Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAccretionOfDiscountOnPremiumReceivable

21000000

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CY2015

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments

5000000

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CY2014Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

875000000

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CY2015Q4

us-gaap

Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

792000000

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CY2015

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

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CY2015

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

1000000

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CY2015

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

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CY2015

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

97000000

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CY2015

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

9000000

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CY2014

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

USD

CY2014

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

10000000

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CY2014

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

12000000

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CY2014

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

48000000

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CY2014

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

2000000

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CY2013

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

USD

CY2013

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

8000000

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CY2013

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

1000000

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CY2013

us-gaap

Deferred Federal Income Tax Expense Benefit

DeferredFederalIncomeTaxExpenseBenefit

165000000

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CY2013

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

-8000000

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CY2015

mbi

Change In Unrealized Gain Loss On Investments

ChangeInUnrealizedGainLossOnInvestments

30000000

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CY2014

mbi

Change In Unrealized Gain Loss On Investments

ChangeInUnrealizedGainLossOnInvestments

-89000000

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CY2013

mbi

Change In Unrealized Gain Loss On Investments

ChangeInUnrealizedGainLossOnInvestments

81000000

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CY2015

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Portion Attributable To Parent

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxPortionAttributableToParent

0

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CY2014

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Portion Attributable To Parent

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxPortionAttributableToParent

29000000

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CY2013

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Portion Attributable To Parent

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxPortionAttributableToParent

-4000000

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CY2015

us-gaap

Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax

OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

-14000000

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CY2014

us-gaap

Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax

OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

-13000000

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CY2013

us-gaap

Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax

OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax

1000000

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CY2015

us-gaap

Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost

IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

9000000

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CY2014

us-gaap

Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost

IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

2000000

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CY2013

us-gaap

Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost

IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost

4000000

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CY2015

us-gaap

Income Tax Effects Allocated Directly To Equity

IncomeTaxEffectsAllocatedDirectlyToEquity

-35000000

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CY2014

us-gaap

Income Tax Effects Allocated Directly To Equity

IncomeTaxEffectsAllocatedDirectlyToEquity

49000000

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CY2013

us-gaap

Income Tax Effects Allocated Directly To Equity

IncomeTaxEffectsAllocatedDirectlyToEquity

-72000000

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CY2015

us-gaap

Income Tax Expense Benefit Intraperiod Tax Allocation

IncomeTaxExpenseBenefitIntraperiodTaxAllocation

74000000

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CY2014

us-gaap

Income Tax Expense Benefit Intraperiod Tax Allocation

IncomeTaxExpenseBenefitIntraperiodTaxAllocation

121000000

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CY2013

us-gaap

Income Tax Expense Benefit Intraperiod Tax Allocation

IncomeTaxExpenseBenefitIntraperiodTaxAllocation

94000000

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CY2015Q4

mbi

Deferred Tax Liabilities Unearned Premium Revenue

DeferredTaxLiabilitiesUnearnedPremiumRevenue

159000000

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CY2014Q4

mbi

Deferred Tax Liabilities Unearned Premium Revenue

DeferredTaxLiabilitiesUnearnedPremiumRevenue

196000000

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CY2015Q4

mbi

Deferred Tax Liabilities Deferral Of Cod Income

DeferredTaxLiabilitiesDeferralOfCodIncome

68000000

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CY2014Q4

mbi

Deferred Tax Liabilities Deferral Of Cod Income

DeferredTaxLiabilitiesDeferralOfCodIncome

91000000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

56000000

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CY2014Q4

us-gaap

Deferred Tax Liabilities Deferred Expense Deferred Policy Acquisition Cost

DeferredTaxLiabilitiesDeferredExpenseDeferredPolicyAcquisitionCost

72000000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Other Comprehensive Income

DeferredTaxLiabilitiesOtherComprehensiveIncome

0

USD

CY2014Q4

us-gaap

Deferred Tax Liabilities Other Comprehensive Income

DeferredTaxLiabilitiesOtherComprehensiveIncome

4000000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Undistributed Foreign Earnings

DeferredTaxLiabilitiesUndistributedForeignEarnings

40000000

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CY2014Q4

us-gaap

Deferred Tax Liabilities Undistributed Foreign Earnings

DeferredTaxLiabilitiesUndistributedForeignEarnings

59000000

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CY2015Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

91000000

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CY2014Q4

us-gaap

Deferred Tax Liabilities Other

DeferredTaxLiabilitiesOther

55000000

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CY2015Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

444000000

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CY2014Q4

us-gaap

Deferred Income Tax Liabilities

DeferredIncomeTaxLiabilities

522000000

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CY2015Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

19000000

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CY2014Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Compensation And Benefits

DeferredTaxAssetsTaxDeferredExpenseCompensationAndBenefits

30000000

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CY2015Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves

119000000

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CY2014Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsLossReserves

69000000

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CY2015Q4

mbi

Deferred Tax Assets Nols And Tax Credit Carryforwards

DeferredTaxAssetsNolsAndTaxCreditCarryforwards

972000000

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CY2014Q4

mbi

Deferred Tax Assets Nols And Tax Credit Carryforwards

DeferredTaxAssetsNolsAndTaxCreditCarryforwards

1150000000

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CY2015Q4

mbi

Deferred Tax Assets Capital Loss Carryforwards And Other Than Temporary Impairments

DeferredTaxAssetsCapitalLossCarryforwardsAndOtherThanTemporaryImpairments

5000000

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CY2014Q4

mbi

Deferred Tax Assets Capital Loss Carryforwards And Other Than Temporary Impairments

DeferredTaxAssetsCapitalLossCarryforwardsAndOtherThanTemporaryImpairments

6000000

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CY2015Q4

mbi

Deferred Tax Assets Insured Derivatives

DeferredTaxAssetsInsuredDerivatives

35000000

USD

CY2014Q4

mbi

Deferred Tax Assets Insured Derivatives

DeferredTaxAssetsInsuredDerivatives

93000000

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CY2015Q4

us-gaap

Deferred Tax Assets Derivative Instruments

DeferredTaxAssetsDerivativeInstruments

45000000

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CY2014Q4

us-gaap

Deferred Tax Assets Derivative Instruments

DeferredTaxAssetsDerivativeInstruments

37000000

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CY2015Q4

us-gaap

Deferred Tax Assets Other Comprehensive Loss

DeferredTaxAssetsOtherComprehensiveLoss

15000000

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CY2014Q4

us-gaap

Deferred Tax Assets Other Comprehensive Loss

DeferredTaxAssetsOtherComprehensiveLoss

0

USD

CY2015Q4

us-gaap

Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax

DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax

22000000

USD

CY2014Q4

us-gaap

Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax

DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax

22000000

USD

CY2015Q4

mbi

Deferred Tax Assets Variable Interest Entities

DeferredTaxAssetsVariableInterestEntities

14000000

USD

CY2014Q4

mbi

Deferred Tax Assets Variable Interest Entities

DeferredTaxAssetsVariableInterestEntities

25000000

USD

CY2015Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

1383000000

USD

CY2014Q4

us-gaap

Deferred Tax Assets Gross

DeferredTaxAssetsGross

1531000000

USD

CY2015Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

0

USD

CY2014Q4

us-gaap

Deferred Tax Assets Valuation Allowance

DeferredTaxAssetsValuationAllowance

0

USD

CY2015Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

939000000

USD

CY2014Q4

us-gaap

Deferred Tax Assets Liabilities Net

DeferredTaxAssetsLiabilitiesNet

1009000000

USD

CY2012Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

47000000

USD

CY2013Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

65000000

USD

CY2014Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

0

USD

CY2015Q4

us-gaap

Unrecognized Tax Benefits

UnrecognizedTaxBenefits

0

USD

CY2014

us-gaap

Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities

UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities

4000000

USD

CY2014

us-gaap

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions

0

USD

CY2015

us-gaap

Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions

UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions

0

USD

CY2015

us-gaap

Unrecognized Tax Benefits Decreases Resulting From Settlements With Taxing Authorities

UnrecognizedTaxBenefitsDecreasesResultingFromSettlementsWithTaxingAuthorities

0

USD

CY2015

us-gaap

Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations

UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations

0

USD

CY2015

us-gaap

Direct Premiums Written

DirectPremiumsWritten

11000000

USD

CY2014

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-18000000

USD

CY2015

us-gaap

Ceded Premiums Written

CededPremiumsWritten

1000000

USD

CY2014

us-gaap

Ceded Premiums Written

CededPremiumsWritten

2000000

USD

CY2015

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2014

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2015

us-gaap

Premiums Written Net

PremiumsWrittenNet

10000000

USD

CY2014

us-gaap

Premiums Written Net

PremiumsWrittenNet

-20000000

USD

CY2014

mbi

Premiums Written Financial Guarantee Insurance Contracts Percentage Of Amount Assumed To Net

PremiumsWrittenFinancialGuaranteeInsuranceContractsPercentageOfAmountAssumedToNet

0

pure

CY2015

mbi

Premiums Written Financial Guarantee Insurance Contracts Percentage Of Amount Assumed To Net

PremiumsWrittenFinancialGuaranteeInsuranceContractsPercentageOfAmountAssumedToNet

0

pure

CY2015

us-gaap

Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Risk Free Discount Rate

FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageRiskFreeDiscountRate

0.027

pure

CY2014

us-gaap

Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Risk Free Discount Rate

FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageRiskFreeDiscountRate

0.028

pure

CY2014

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Premium Payments Received

FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumPaymentsReceived

-120000000

USD

CY2014

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable New Business Written

FinancialGuaranteeInsuranceContractsPremiumReceivableNewBusinessWritten

6000000

USD

CY2014

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract

-50000000

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CY2014

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Accretion Of Discount On Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentAccretionOfDiscountOnPremiumReceivable

26000000

USD

CY2014

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments

-38000000

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CY2012Q4

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

197000000

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CY2015

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus

0

USD

CY2014

us-gaap

Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Change In Status

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsChangeInStatus

0

USD

CY2012Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber

5963268

shares

CY2012Q4

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice

19.0485

CY2015

us-gaap

Stock Issued During Period Shares Stock Options Exercised

StockIssuedDuringPeriodSharesStockOptionsExercised

0

shares

CY2015

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod

222700

shares

CY2014

us-gaap

Stock Issued During Period Shares Stock Options Exercised

StockIssuedDuringPeriodSharesStockOptionsExercised

400000

shares

CY2014

us-gaap

Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures And Expirations In Period

ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod

767406

shares

CY2015

us-gaap

Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price

ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

0

CY2015

us-gaap

Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price

ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

59.2118

CY2014

us-gaap

Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price

ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice

4.02

CY2014

us-gaap

Share Based Compensation Arrangements By Share Based Payment Award Options Expirations In Period Weighted Average Exercise Price

ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExpirationsInPeriodWeightedAverageExercisePrice

61.5815

CY2015

mbi

Percentage Of Voting Interests Of Company

PercentageOfVotingInterestsOfCompany

0.1

pure

CY2015

mbi

Loans To Executive Officers Or Directors

LoansToExecutiveOfficersOrDirectors

0

securityloan

CY2014

mbi

Loans To Executive Officers Or Directors

LoansToExecutiveOfficersOrDirectors

0

securityloan

CY2013

us-gaap

Undistributed Earnings Loss Allocated To Participating Securities Diluted

UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted

5000000

USD

CY2015

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

379000000

USD

CY2015

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

2000000

USD

CY2015

mbi

Gross Premium Earned Financial Guarantee Insurance Contracts

GrossPremiumEarnedFinancialGuaranteeInsuranceContracts

381000000

USD

CY2014

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

407000000

USD

CY2014

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

2000000

USD

CY2014

mbi

Gross Premium Earned Financial Guarantee Insurance Contracts

GrossPremiumEarnedFinancialGuaranteeInsuranceContracts

409000000

USD

CY2015Q4

mbi

Aggregate Amount Insurance In Force Outstanding Ceded To Reinsurers

AggregateAmountInsuranceInForceOutstandingCededToReinsurers

9500000000

USD

CY2015

dei

Document Type

DocumentType

10-K

CY2014Q4

mbi

Aggregate Amount Insurance In Force Outstanding Ceded To Reinsurers

AggregateAmountInsuranceInForceOutstandingCededToReinsurers

11100000000

USD

CY2015

dei

Document Period End Date

DocumentPeriodEndDate

2015-12-31

CY2015

dei

Document Fiscal Period Focus

DocumentFiscalPeriodFocus

FY

CY2013

us-gaap

Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount

AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount

43210917

shares

CY2013

mbi

Unvested Restricted Stock And Units That Receive Nonforfeitable Dividends Or Dividend Equivalents That Have Met Service Condition

UnvestedRestrictedStockAndUnitsThatReceiveNonforfeitableDividendsOrDividendEquivalentsThatHaveMetServiceCondition

629896

shares

CY2014

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

90000000

USD

CY2014

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

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-17000000

USD

CY2013

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

-126000000

USD

CY2013

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

16000000

USD

CY2013Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-86000000

USD

CY2012Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

56000000

USD

CY2013

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

325000000

USD

CY2014

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

398000000

USD

CY2015

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

69000000

USD

CY2015

dei

Entity Voluntary Filers

EntityVoluntaryFilers

No

CY2015Q2

dei

Entity Public Float

EntityPublicFloat

880396155

USD

CY2015

dei

Entity Well Known Seasoned Issuer

EntityWellKnownSeasonedIssuer

Yes

CY2015

us-gaap

Lessee Leasing Arrangements Operating Leases Renewal Term

LesseeLeasingArrangementsOperatingLeasesRenewalTerm

P5Y

CY2015

mbi

Number Of Operating Lease Term Extensions

NumberOfOperatingLeaseTermExtensions

2

pure

CY2015Q4

us-gaap

Operating Leases Future Minimum Payments Due

OperatingLeasesFutureMinimumPaymentsDue

41000000

USD

CY2015Q4

mbi

Lease Incentives

LeaseIncentives

6000000

USD

CY2013Q4

mbi

Insurance Loss Recoverable

InsuranceLossRecoverable

694000000

USD

CY2015Q4

us-gaap

Warrants And Rights Outstanding

WarrantsAndRightsOutstanding

18000000

USD

CY2014Q4

us-gaap

Warrants And Rights Outstanding

WarrantsAndRightsOutstanding

28000000

USD

CY2015Q4

us-gaap

Stock Repurchase Program Remaining Authorized Repurchase Amount1

StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

94000000

USD

CY2014Q4

us-gaap

Stock Repurchase Program Remaining Authorized Repurchase Amount1

StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

188000000

USD

CY2013Q4

us-gaap

Stock Repurchase Program Remaining Authorized Repurchase Amount1

StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1

23000000

USD

CY2015

us-gaap

Treasury Stock Shares Acquired

TreasuryStockSharesAcquired

39900000

shares

CY2014

us-gaap

Treasury Stock Shares Acquired

TreasuryStockSharesAcquired

3300000

shares

CY2014

us-gaap

Treasury Stock Acquired Average Cost Per Share

TreasuryStockAcquiredAverageCostPerShare

10.45

CY2015

us-gaap

Treasury Stock Acquired Average Cost Per Share

TreasuryStockAcquiredAverageCostPerShare

7.6

CY2013

us-gaap

Treasury Stock Acquired Average Cost Per Share

TreasuryStockAcquiredAverageCostPerShare

0

CY2013

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

60000000

USD

CY2013

us-gaap

Policyholder Benefits And Claims Incurred Net

PolicyholderBenefitsAndClaimsIncurredNet

117000000

USD

CY2015Q4

mbi

Guarantee Obligations Maximum Net Exposure

GuaranteeObligationsMaximumNetExposure

3400000000

USD

CY2015

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

pure

CY2013

mbi

Revenues Of Consolidated Vies

RevenuesOfConsolidatedVies

233000000

USD

CY2015

us-gaap

Quantifying Misstatement In Current Year Financial Statements Amount

QuantifyingMisstatementInCurrentYearFinancialStatementsAmount

17000000

USD

CY2014

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

pure

CY2013

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.35

pure

CY2015

mbi

Effective Income Tax Rate Reconciliation Mark To Market On Warrants

EffectiveIncomeTaxRateReconciliationMarkToMarketOnWarrants

-0.012

pure

CY2014

mbi

Effective Income Tax Rate Reconciliation Mark To Market On Warrants

EffectiveIncomeTaxRateReconciliationMarkToMarketOnWarrants

-0.016

pure

CY2013

mbi

Effective Income Tax Rate Reconciliation Mark To Market On Warrants

EffectiveIncomeTaxRateReconciliationMarkToMarketOnWarrants

0.038

pure

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance

EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

0

pure

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance

EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

-0.135

pure

CY2013

us-gaap

Effective Income Tax Rate Reconciliation Change In Deferred Tax Assets Valuation Allowance

EffectiveIncomeTaxRateReconciliationChangeInDeferredTaxAssetsValuationAllowance

-0.126

pure

CY2015

mbi

Effective Income Taxrate Reconciliation Uncertain Tax Positions

EffectiveIncomeTaxrateReconciliationUncertainTaxPositions

0

pure

CY2014

mbi

Effective Income Taxrate Reconciliation Uncertain Tax Positions

EffectiveIncomeTaxrateReconciliationUncertainTaxPositions

-0.091

pure

CY2013

mbi

Effective Income Taxrate Reconciliation Uncertain Tax Positions

EffectiveIncomeTaxrateReconciliationUncertainTaxPositions

0.028

pure

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

EffectiveIncomeTaxRateReconciliationOtherAdjustments

0.012

pure

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

EffectiveIncomeTaxRateReconciliationOtherAdjustments

0.004

pure

CY2013

us-gaap

Effective Income Tax Rate Reconciliation Other Adjustments

EffectiveIncomeTaxRateReconciliationOtherAdjustments

-0.005

pure

CY2015

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.377

pure

CY2014

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.112

pure

CY2013

us-gaap

Effective Income Tax Rate Continuing Operations

EffectiveIncomeTaxRateContinuingOperations

0.399

pure

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings

EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings

0

pure

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings

EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings

0

pure

CY2013

us-gaap

Effective Income Tax Rate Reconciliation Repatriation Of Foreign Earnings

EffectiveIncomeTaxRateReconciliationRepatriationOfForeignEarnings

0.114

pure

CY2015

us-gaap

Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost

EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost

0.027

pure

CY2014

us-gaap

Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost

EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost

0

pure

CY2013

us-gaap

Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost

EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost

0

pure

CY2015Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

137000000

USD

CY2014Q4

us-gaap

Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Accrued Liabilities

DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsAccruedLiabilities

99000000

USD

CY2014

us-gaap

Unrecognized Tax Benefits Decreases Resulting From Prior Period Tax Positions

UnrecognizedTaxBenefitsDecreasesResultingFromPriorPeriodTaxPositions

61000000

USD

CY2015Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

30000000

USD

CY2014Q4

us-gaap

Deferred Tax Liabilities Investments

DeferredTaxLiabilitiesInvestments

45000000

USD

CY2013

us-gaap

Treasury Stock Value Acquired Cost Method

TreasuryStockValueAcquiredCostMethod

7000000

USD

CY2014

us-gaap

Treasury Stock Value Acquired Cost Method

TreasuryStockValueAcquiredCostMethod

35000000

USD

CY2015

us-gaap

Treasury Stock Value Acquired Cost Method

TreasuryStockValueAcquiredCostMethod

303000000

USD

CY2015

us-gaap

Revenue Other Financial Services

RevenueOtherFinancialServices

530000000

USD

CY2015

mbi

Revenue From Transactions With Other Operating Segments Of Same Entity

RevenueFromTransactionsWithOtherOperatingSegmentsOfSameEntity

0

USD

CY2015

mbi

Expense From Transactions With Other Operating Segments Of Same Entity

ExpenseFromTransactionsWithOtherOperatingSegmentsOfSameEntity

0

USD

CY2013

us-gaap

Revenue Other Financial Services

RevenueOtherFinancialServices

644000000

USD

CY2013

mbi

Revenue From Transactions With Other Operating Segments Of Same Entity

RevenueFromTransactionsWithOtherOperatingSegmentsOfSameEntity

0

USD

CY2013

mbi

Expense From Transactions With Other Operating Segments Of Same Entity

ExpenseFromTransactionsWithOtherOperatingSegmentsOfSameEntity

0

USD

CY2014Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

246000000

USD

CY2015Q4

mbi

Aggregate Amount Of Insured Par Outstanding Ceded To Reinsurers

AggregateAmountOfInsuredParOutstandingCededToReinsurers

5294000000

USD

CY2015Q4

mbi

Reinsurance Recoverables Secured By Letters Of Credit Amount

ReinsuranceRecoverablesSecuredByLettersOfCreditAmount

33000000

USD

CY2015Q4

us-gaap

Reinsurance Recoverables

ReinsuranceRecoverables

6000000

USD

CY2014

us-gaap

Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate

FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate

0.0172

pure

CY2015Q4

us-gaap

Deferred Tax Assets Tax Credit Carryforwards Foreign

DeferredTaxAssetsTaxCreditCarryforwardsForeign

9000000

USD

CY2015Q4

us-gaap

Participating Policies Amount In Force

ParticipatingPoliciesAmountInForce

326600000000

USD

CY2014Q4

us-gaap

Participating Policies Amount In Force

ParticipatingPoliciesAmountInForce

437800000000

USD

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$MBI
MBIA INC Stock $mbi

2014 Q4 Form 10-K Financial Statement

#000119312516485560 Filed on February 29, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MBI MBIA INC Stock $mbi

2014 Q4 Form 10-K Financial Statement

#000119312516485560 Filed on February 29, 2016

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$MBI
MBIA INC Stock $mbi