$ambc 2018 Q4 10-K

Concept	2018 Q4	2018 Q3	2018 Q2
Revenue	$37.00M	$134.0M	$150.6M
YoY Change	-65.44%	53.73%	76.89%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin
YoY Change
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$29.20M	$26.50M	$23.50M
YoY Change	-15.12%	-42.39%	-30.27%
% of Gross Profit
Operating Expenses	$8.000M	$88.30M	$81.90M
YoY Change	-95.16%	-69.51%	-37.43%
Operating Profit
YoY Change
Interest Expense	-$66.10M	-$65.70M	-$62.40M
YoY Change	113.23%	125.77%	121.28%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	-$22.00M	-$39.83M	$13.10M
YoY Change	218.06%	-78.52%	-6.35%
Income Tax	-$1.700M	$2.211M	$1.995M
% Of Pretax Income			15.22%
Net Earnings	-$20.00M	-$104.0M	$4.000M
YoY Change	2.67%	-45.52%	-43.74%
Net Earnings / Revenue	-54.05%	-77.6%	2.66%
Basic Earnings Per Share	-$0.45	-$2.27	$0.09
Diluted Earnings Per Share	-$0.45	-$2.27	$0.09
COMMON SHARES
Basic Shares Outstanding	45.34M shares	45.75M shares	45.68M shares
Diluted Shares Outstanding		45.75M shares	46.47M shares

Concept	2018 Q4	2018 Q3	2018 Q2
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$63.00M	$52.51M	$44.40M
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
YoY Change
Goodwill
YoY Change
Intangibles	$719.0M
YoY Change	-15.11%
Long-Term Investments	$40.00M	$38.83M	$37.50M
YoY Change	14.48%	15.3%	15.67%
Other Assets	$20.00M	$1.000M	$1.000M
YoY Change	1900.0%	-97.37%	-80.0%
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$14.59B	$15.09B	$21.54B
YoY Change	-37.1%	-35.2%	-6.39%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$376.0M	$360.0M	$238.0M
YoY Change	-14.16%	-14.49%	-40.35%
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	$378.0M	$391.0M	$255.0M
YoY Change	-14.09%	-21.01%	-40.84%
LONG-TERM LIABILITIES
Long-Term Debt	$8.198B	$8.524B	$14.25B
YoY Change	-37.67%	-35.51%	10.55%
Other Long-Term Liabilities	$1.851B	$1.780B	$2.118B
YoY Change	-21.43%	-20.75%	-4.94%
Total Long-Term Liabilities	$10.05B	$10.30B	$16.37B
YoY Change	-35.2%	-33.37%	8.27%
TOTAL LIABILITIES
Total Short-Term Liabilities	$378.0M	$391.0M	$255.0M
Total Long-Term Liabilities	$10.05B	$10.30B	$16.37B
Total Liabilities	$12.96B	$13.34B	$19.74B
YoY Change	-39.87%	-38.78%	-7.48%
SHAREHOLDERS EQUITY
Retained Earnings	$1.421B
YoY Change	15.17%
Common Stock	$0.00
YoY Change	-100.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$0.00
YoY Change	-100.0%
Treasury Stock Shares	28.89K shares
Shareholders Equity	$1.592B	$1.758B	$1.800B
YoY Change
Total Liabilities & Shareholders Equity	$14.59B	$15.09B	$21.54B
YoY Change	-37.1%	-35.2%	-6.39%

Concept	2018 Q4	2018 Q3	2018 Q2
OPERATING ACTIVITIES
Net Income	-$20.00M	-$104.0M	$4.000M
YoY Change	2.67%	-45.52%	-43.74%
Depreciation, Depletion And Amortization	$29.20M	$26.50M	$23.50M
YoY Change	-15.12%	-42.39%	-30.27%
Cash From Operating Activities	-$125.4M	-$106.3M	-$120.0M
YoY Change	-318.47%	-6.1%	-25.33%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	$338.5M	$234.0M	$358.4M
YoY Change	-50.89%	300.0%	95.74%
Cash From Investing Activities	$338.5M	$234.0M	$358.4M
YoY Change	-50.89%	300.0%	95.74%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-183.5M	-119.4M	-232.3M
YoY Change	-21.72%	-210.76%	172.33%
NET CHANGE
Cash From Operating Activities	-125.4M	-106.3M	-120.0M
Cash From Investing Activities	338.5M	234.0M	358.4M
Cash From Financing Activities	-183.5M	-119.4M	-232.3M
Net Change In Cash	29.60M	8.300M	6.100M
YoY Change	-94.22%	-84.37%	-109.7%
FREE CASH FLOW
Cash From Operating Activities	-$125.4M	-$106.3M	-$120.0M
Capital Expenditures
Free Cash Flow
YoY Change

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2018	ambc	Changein Impactof Amt Repealon Current Taxes ChangeinImpactofAMTRepealonCurrentTaxes	1902000	USD
CY2017	ambc	Impactof Amt Repealon Current Taxes ImpactofAMTRepealonCurrentTaxes	29581000	USD
CY2017	ambc	Impactofnew Tax Lawon Deferred Taxes ImpactofnewTaxLawonDeferredTaxes	31418000	USD
CY2017	ambc	Net Impactof New Tax Law NetImpactofNewTaxLaw	1886000	USD
CY2019	dei	Amendment Flag AmendmentFlag	false
CY2018	ambc	Amt Installment Payment End Date AMTInstallmentPaymentEndDate	2021-12-31
CY2018Q4	ambc	Amt Receivable Resultingfrom Tcja AMTReceivableResultingfromTCJA	37019000	USD
CY2017	ambc	Amt Relatedto Filingof2017 Tax Return AMTRelatedtoFilingof2017TaxReturn	5536000	USD
CY2019	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2019	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2019	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2019
CY2019	dei	Document Period End Date DocumentPeriodEndDate	2019-12-31
CY2019	dei	Entity Central Index Key EntityCentralIndexKey	0000874501
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Shell Company EntityShellCompany	false
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2018Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	130000000	shares
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	130000000	shares
CY2018Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	45365170	shares
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	45571743	shares
CY2018Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	45336278	shares
CY2017	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionTax	0	USD
CY2018Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2018Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2019Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	20000000	shares
CY2018Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2018Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2019Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2018Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	28892	shares
CY2019Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	16343	shares
CY2019	dei	Document Type DocumentType	10-K
CY2019	dei	Document Annual Report DocumentAnnualReport	true
CY2019	dei	Document Transition Report DocumentTransitionReport	false
CY2019	dei	Entity File Number EntityFileNumber	1-10777
CY2019	dei	Entity Registrant Name EntityRegistrantName	AMBAC FINANCIAL GROUP INC
CY2019	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2019	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	13-3621676
CY2019	dei	Entity Address Address Line1 EntityAddressAddressLine1	One World Trade Center
CY2019	dei	Entity Address City Or Town EntityAddressCityOrTown	New York
CY2019	dei	Entity Address State Or Province EntityAddressStateOrProvince	NY
CY2019	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	10007
CY2019	dei	City Area Code CityAreaCode	(212)
CY2019	dei	Local Phone Number LocalPhoneNumber	658-7470
CY2019	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	Yes
CY2019	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2019	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2019	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2013Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	45577874	shares
CY2019	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2019	dei	Entity Small Business EntitySmallBusiness	false
CY2019	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2018Q2	dei	Entity Public Float EntityPublicFloat	767503767	USD
CY2019Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	653000000	USD
CY2018Q4	us-gaap	Other Short Term Investments OtherShortTermInvestments	430000000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	478000000	USD
CY2018Q4	us-gaap	Other Investments OtherInvestments	391000000	USD
CY2019Q4	us-gaap	Investments Investments	3792000000	USD
CY2018Q4	us-gaap	Investments Investments	3937000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	24000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	63000000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	55000000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	19000000	USD
CY2019Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	416000000	USD
CY2018Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	495000000	USD
CY2019Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	26000000	USD
CY2018Q4	us-gaap	Reinsurance Recoverables ReinsuranceRecoverables	23000000	USD
CY2019Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	82000000	USD
CY2018Q4	us-gaap	Prepaid Reinsurance Premiums PrepaidReinsurancePremiums	61000000	USD
CY2019Q4	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	2029000000	USD
CY2018Q4	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	1933000000	USD
CY2019Q4	us-gaap	Derivative Assets DerivativeAssets	75000000	USD
CY2018Q4	us-gaap	Derivative Assets DerivativeAssets	59000000	USD
CY2019Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	11000000	USD
CY2018Q4	us-gaap	Income Taxes Receivable IncomeTaxesReceivable	47000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	427000000	USD
CY2018Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	719000000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	95000000	USD
CY2018Q4	us-gaap	Other Assets OtherAssets	138000000	USD
CY2019Q4	us-gaap	Assets Assets	13320000000	USD
CY2018Q4	us-gaap	Assets Assets	14589000000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	518000000	USD
CY2018Q4	us-gaap	Unearned Premiums UnearnedPremiums	630000000	USD
CY2019Q4	us-gaap	Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts	1548000000	USD
CY2018Q4	us-gaap	Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts	1826000000	USD
CY2019Q4	us-gaap	Reinsurance Payable ReinsurancePayable	29000000	USD
CY2018Q4	us-gaap	Reinsurance Payable ReinsurancePayable	33000000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	32000000	USD
CY2018Q4	us-gaap	Deferred Income Tax Liabilities Net DeferredIncomeTaxLiabilitiesNet	40000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	2822000000	USD
CY2018Q4	us-gaap	Long Term Debt LongTermDebt	2929000000	USD
CY2019Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	441000000	USD
CY2018Q4	us-gaap	Interest Payable Current And Noncurrent InterestPayableCurrentAndNoncurrent	376000000	USD
CY2019Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	90000000	USD
CY2018Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	77000000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	93000000	USD
CY2018Q4	us-gaap	Other Liabilities OtherLiabilities	64000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	11783000000	USD
CY2018Q4	us-gaap	Liabilities Liabilities	12956000000	USD
CY2019Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2018Q4	us-gaap	Preferred Stock Value PreferredStockValue	0	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2018Q4	us-gaap	Common Stock Value CommonStockValue	0	USD
CY2019Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	232000000	USD
CY2018Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	219000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	42000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-49000000	USD
CY2019Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1203000000	USD
CY2018Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	1421000000	USD
CY2019Q4	us-gaap	Treasury Stock Value TreasuryStockValue	0	USD
CY2018Q4	us-gaap	Treasury Stock Value TreasuryStockValue	0	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	1477000000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	1592000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	60000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	41000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1536000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1633000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	13320000000	USD
CY2018Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	14589000000	USD
CY2019	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	66000000	USD
CY2018	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	111000000	USD
CY2017	us-gaap	Premiums Earned Net Financial Guarantee Insurance Contracts PremiumsEarnedNetFinancialGuaranteeInsuranceContracts	175000000	USD
CY2019	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	196000000	USD
CY2018	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	271000000	USD
CY2017	us-gaap	Interest And Dividend Income Securities Available For Sale InterestAndDividendIncomeSecuritiesAvailableForSale	338000000	USD
CY2019	ambc	Other Investment Income OtherInvestmentIncome	32000000	USD
CY2018	ambc	Other Investment Income OtherInvestmentIncome	2000000	USD
CY2017	ambc	Other Investment Income OtherInvestmentIncome	23000000	USD
CY2019	us-gaap	Net Investment Income NetInvestmentIncome	227000000	USD
CY2018	us-gaap	Net Investment Income NetInvestmentIncome	273000000	USD
CY2017	us-gaap	Net Investment Income NetInvestmentIncome	361000000	USD
CY2019	us-gaap	Impairment Of Investments ImpairmentOfInvestments	0	USD
CY2018	us-gaap	Impairment Of Investments ImpairmentOfInvestments	3000000	USD
CY2017	us-gaap	Impairment Of Investments ImpairmentOfInvestments	55000000	USD
CY2019	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	0	USD
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	0	USD
CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest	-34000000	USD
CY2019	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	0	USD
CY2018	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	3000000	USD
CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet	20000000	USD
CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	81000000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	112000000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	5000000	USD
CY2019	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-50000000	USD
CY2018	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	7000000	USD
CY2017	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	76000000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
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CY2017	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	5000000	USD
CY2019	us-gaap	Other Income OtherIncome	134000000	USD
CY2018	us-gaap	Other Income OtherIncome	5000000	USD
CY2017	us-gaap	Other Income OtherIncome	0	USD
CY2019	us-gaap	Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss	38000000	USD
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CY2019	us-gaap	Revenues Revenues	496000000	USD
CY2018	us-gaap	Revenues Revenues	511000000	USD
CY2017	us-gaap	Revenues Revenues	622000000	USD
CY2019	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	13000000	USD
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CY2017	us-gaap	Incurred Claims Financial Guarantee Insurance Contracts IncurredClaimsFinancialGuaranteeInsuranceContracts	513000000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	295000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	107000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	151000000	USD
CY2019	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	103000000	USD
CY2018	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	112000000	USD
CY2017	us-gaap	Other Underwriting Expense OtherUnderwritingExpense	122000000	USD
CY2019	us-gaap	Interest Expense Debt InterestExpenseDebt	269000000	USD
CY2018	us-gaap	Interest Expense Debt InterestExpenseDebt	242000000	USD
CY2017	us-gaap	Interest Expense Debt InterestExpenseDebt	120000000	USD
CY2019	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	680000000	USD
CY2018	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	238000000	USD
CY2017	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	906000000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-183000000	USD
CY2018	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	273000000	USD
CY2017	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	-284000000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	32000000	USD
CY2018	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	5000000	USD
CY2017	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	44000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-216000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	267000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	-329000000	USD
CY2019	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	0	USD
CY2018	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	82000000	USD
CY2017	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	0	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-216000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	186000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-329000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-216000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	267000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	-329000000	USD
CY2019	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	65000000	USD
CY2018	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	55000000	USD
CY2017	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-82000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	26000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	-48000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	74000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	0	USD
CY2018	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	-1000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax	0	USD
CY2019	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	1000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	2000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-1000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	91000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	6000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-7000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-125000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	274000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-335000000	USD
CY2019	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	0	USD
CY2018	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	82000000	USD
CY2017	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	0	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-125000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	192000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-335000000	USD
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-4.69
CY2018	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	4.07
CY2017	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-7.25
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-4.69
CY2018	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.99
CY2017	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-7.25
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CY2017	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45665883	shares
CY2016	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	45367932	shares
CY2018	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	45954908	shares
CY2017	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	46559835	shares
CY2016	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	45367932	shares
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1633000000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-125000000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12000000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-3000000	USD
CY2019	ambc	Amps Impacton Stockholders Equity AMPSImpactonStockholdersEquity	19000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1536000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1645000000	USD
CY2018	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	274000000	USD
CY2018	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification	0	USD
CY2018	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	12000000	USD
CY2018	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-1000000	USD
CY2018	ambc	Amps Impacton Stockholders Equity AMPSImpactonStockholdersEquity	-297000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1633000000	USD
CY2016Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1978000000	USD
CY2017	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-335000000	USD
CY2017	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	4000000	USD
CY2017	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	-2000000	USD
CY2017Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1645000000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	-216000000	USD
CY2018	us-gaap	Net Income Loss NetIncomeLoss	186000000	USD
CY2017	us-gaap	Net Income Loss NetIncomeLoss	-329000000	USD
CY2019	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	0	USD
CY2018	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	82000000	USD
CY2019	us-gaap	Profit Loss ProfitLoss	-216000000	USD
CY2018	us-gaap	Profit Loss ProfitLoss	267000000	USD
CY2017	us-gaap	Profit Loss ProfitLoss	-329000000	USD
CY2019	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	0	USD
CY2018	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1000000	USD
CY2017	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	1000000	USD
CY2019	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	63000000	USD
CY2018	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	137000000	USD
CY2017	us-gaap	Accretion Amortization Of Discounts And Premiums Investments AccretionAmortizationOfDiscountsAndPremiumsInvestments	183000000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	12000000	USD
CY2018	us-gaap	Share Based Compensation ShareBasedCompensation	12000000	USD
CY2017	us-gaap	Share Based Compensation ShareBasedCompensation	4000000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-1000000	USD
CY2018	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-7000000	USD
CY2017	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-32000000	USD
CY2019	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	35000000	USD
CY2018	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-35000000	USD
CY2017	us-gaap	Increase Decrease In Accrued Income Taxes Payable IncreaseDecreaseInAccruedIncomeTaxesPayable	-26000000	USD
CY2019	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-132000000	USD
CY2018	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-163000000	USD
CY2017	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	-168000000	USD
CY2019	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	364000000	USD
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CY2017	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-400000000	USD
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CY2018	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-5000000	USD
CY2017	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-5000000	USD
CY2019	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-77000000	USD
CY2018	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-91000000	USD
CY2017	us-gaap	Increase Decrease In Premiums Receivable IncreaseDecreaseInPremiumsReceivable	-77000000	USD
CY2019	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	87000000	USD
CY2018	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	9000000	USD
CY2017	us-gaap	Increase Decrease In Interest Payable Net IncreaseDecreaseInInterestPayableNet	50000000	USD
CY2019	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	295000000	USD
CY2018	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	107000000	USD
CY2017	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	151000000	USD
CY2019	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	1000000	USD
CY2018	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-1000000	USD
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CY2019	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	81000000	USD
CY2018	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	112000000	USD
CY2017	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	5000000	USD
CY2019	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities	0	USD
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CY2017	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities	20000000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	0	USD
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CY2019	us-gaap	Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss	38000000	USD
CY2018	us-gaap	Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss	3000000	USD
CY2017	us-gaap	Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss	20000000	USD
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CY2018	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	17000000	USD
CY2017	us-gaap	Increase Decrease In Derivative Assets And Liabilities IncreaseDecreaseInDerivativeAssetsAndLiabilities	223000000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-80000000	USD
CY2018	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-67000000	USD
CY2017	us-gaap	Increase Decrease In Other Operating Capital Net IncreaseDecreaseInOtherOperatingCapitalNet	-22000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-311000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1543000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-221000000	USD
CY2019	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1212000000	USD
CY2018	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1248000000	USD
CY2017	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	2139000000	USD
CY2019	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	379000000	USD
CY2018	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	432000000	USD
CY2017	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	814000000	USD
CY2019	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	959000000	USD
CY2018	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	528000000	USD
CY2017	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	2054000000	USD
CY2019	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	81000000	USD
CY2018	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	159000000	USD
CY2017	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	350000000	USD
CY2019	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	137000000	USD
CY2018	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	140000000	USD
CY2017	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	299000000	USD
CY2019	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	218000000	USD
CY2018	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-127000000	USD
CY2017	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	127000000	USD
CY2019	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	100000000	USD
CY2018	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	-58000000	USD
CY2017	us-gaap	Increase Decrease Cash Collateral From Counterparties IncreaseDecreaseCashCollateralFromCounterparties	123000000	USD
CY2019	ambc	Proceeds From Financial Guaranty Variable Interest Entity Assets ProceedsFromFinancialGuarantyVariableInterestEntityAssets	543000000	USD
CY2018	ambc	Proceeds From Financial Guaranty Variable Interest Entity Assets ProceedsFromFinancialGuarantyVariableInterestEntityAssets	349000000	USD
CY2017	ambc	Proceeds From Financial Guaranty Variable Interest Entity Assets ProceedsFromFinancialGuarantyVariableInterestEntityAssets	235000000	USD
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CY2017	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	17000000	USD
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CY2018	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	1588000000	USD
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CY2018	ambc	Proceeds From Issuanceof Tier Ii Notes ProceedsFromIssuanceofTierIINotes	240000000	USD
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CY2019	ambc	Paydownof Ambac Note PaydownofAmbacNote	178000000	USD
CY2018	ambc	Paydownof Ambac Note PaydownofAmbacNote	214000000	USD
CY2019	ambc	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	0	USD
CY2018	ambc	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	74000000	USD
CY2017	ambc	Paydown Of Variable Interest Entity Secured Borrowing PaydownOfVariableInterestEntitySecuredBorrowing	29000000	USD
CY2017	ambc	Payments From Drawdowns Of Borrowings Under Guaranteed Investment Agreements PaymentsFromDrawdownsOfBorrowingsUnderGuaranteedInvestmentAgreements	82000000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	USD
CY2018	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	191000000	USD
CY2017	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	69000000	USD
CY2018	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	9000000	USD
CY2019	ambc	Amps Proceeds AMPSProceeds	19000000	USD
CY2019	ambc	Amps Exchange Cash Paid AMPSExchangeCashPaid	0	USD
CY2018	ambc	Amps Exchange Cash Paid AMPSExchangeCashPaid	11000000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	3000000	USD
CY2018	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1000000	USD
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CY2019	ambc	Paydownof Financial Guaranty Variable Interest Entity Liabilities PaydownofFinancialGuarantyVariableInterestEntityLiabilities	542000000	USD
CY2018	ambc	Paydownof Financial Guaranty Variable Interest Entity Liabilities PaydownofFinancialGuarantyVariableInterestEntityLiabilities	349000000	USD
CY2017	ambc	Paydownof Financial Guaranty Variable Interest Entity Liabilities PaydownofFinancialGuarantyVariableInterestEntityLiabilities	230000000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-691000000	USD
CY2018	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-585000000	USD
CY2017	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-412000000	USD
CY2019	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	0	USD
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CY2017	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	529000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	625000000	USD
CY2016Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	96000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	81000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	625000000	USD
CY2019	dei	Entity Incorporation Date Of Incorporation EntityIncorporationDateOfIncorporation	1991-04-29
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CY2018Q1	ambc	Satisfactionanddischargeofsegregatedaccountdeferredamountsanddeferredinterest Satisfactionanddischargeofsegregatedaccountdeferredamountsanddeferredinterest	3857000000	USD
CY2018Q1	ambc	Cancellationof Surplus Notes Principal CancellationofSurplusNotesPrincipal	552000000	USD
CY2018Q1	ambc	Cancellationof Surplus Notes Accrued Interest CancellationofSurplusNotesAccruedInterest	257000000	USD
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CY2018Q1	ambc	Tier2 Notes Tier2Notes	240000000	USD
CY2018Q1	ambc	Tier2 Note Securityin Rmbs Litigation Settlement Proceeds Tier2NoteSecurityinRMBSLitigationSettlementProceeds	1600000000	USD
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CY2018Q3	ambc	Amps Exchange Cash Paid Per Share AMPSExchangeCashPaidPerShare	500
CY2018Q3	ambc	Amps Exchange Warrants Issued Per Share AMPSExchangeWarrantsIssuedPerShare	37.3076
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CY2018Q3	ambc	Amps Exchange Aggregated Liquidation Preference AMPSExchangeAggregatedLiquidationPreference	557000000	USD
CY2018Q3	ambc	Amps Exchange Nominal Discount AMPSExchangeNominalDiscount	227000000	USD
CY2018Q3	ambc	Amps Exchange Nominal Discountat Fair Value AMPSExchangeNominalDiscountatFairValue	253000000	USD
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CY2018Q3	ambc	Amps Exchange Total Surplus Notes Issued AMPSExchangeTotalSurplusNotesIssued	213000000	USD
CY2018Q3	ambc	Amps Exchange Interest Includedin Surplus Notes Issued AMPSExchangeInterestIncludedinSurplusNotesIssued	98000000	USD
CY2018Q3	ambc	Amps Exchange Total Warrants Issued AMPSExchangeTotalWarrantsIssued	824307
CY2018	ambc	Amps Exchange Cash Paid AMPSExchangeCashPaid	11000000	USD
CY2018	ambc	Amps Exchange Loss Basedon Carry Value AMPSExchangeLossBasedonCarryValue	82000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	60000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	41000000	USD
CY2019Q4	ambc	Estimated Future Premium Payments Weighted Average Discounted Rate EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate	0.024
CY2018Q4	ambc	Estimated Future Premium Payments Weighted Average Discounted Rate EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate	0.027
CY2019	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1 FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1	P8Y6M
CY2018	us-gaap	Financial Guarantee Insurance Contracts Premium Received Over Contract Period Premium Receivable Weighted Average Collection Period1 FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1	P8Y8M12D
CY2019Q4	us-gaap	Minority Interest MinorityInterest	60000000	USD
CY2018Q4	us-gaap	Minority Interest MinorityInterest	41000000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	12000000	USD
CY2018	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-7000000	USD
CY2017	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	21000000	USD
CY2019	us-gaap	Income Taxes Paid IncomeTaxesPaid	21000000	USD
CY2018	us-gaap	Income Taxes Paid IncomeTaxesPaid	35000000	USD
CY2017	us-gaap	Income Taxes Paid IncomeTaxesPaid	40000000	USD
CY2018Q3	ambc	Amps Exchange Carrying Valueof Surplus Notes Issued AMPSExchangeCarryingValueofSurplusNotesIssued	187000000	USD
CY2017	ambc	Decreaseinlongtermdebtasaresultofanexchangeforinvestmentsecurities Decreaseinlongtermdebtasaresultofanexchangeforinvestmentsecurities	55000000	USD
CY2018Q4	ambc	Non Cash Impactof Rehabilitation Exit Transaction NonCashImpactofRehabilitationExitTransaction	1919000000	USD
CY2019Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	24000000	USD
CY2018Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	63000000	USD
CY2017Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	624000000	USD
CY2019Q4	us-gaap	Restricted Cash RestrictedCash	55000000	USD
CY2018Q4	us-gaap	Restricted Cash RestrictedCash	19000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	81000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	83000000	USD
CY2017Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	625000000	USD
CY2019	us-gaap	Prior Period Reclassification Adjustment Description PriorPeriodReclassificationAdjustmentDescription	<div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-weight:bold;">Reclassifications and Rounding</span></div><div style="line-height:120%;padding-bottom:12px;padding-top:0px;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;">Reclassifications may have been made to prior years' amounts to conform to the current year's presentation. Certain amounts and tables in the consolidated financial statements and associated notes may not add due to rounding.</span></div>
CY2018Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	15000000	USD
CY2019	ambc	Variable Interest Entity Changein Fair Valueof Assetsand Liabilities VariableInterestEntityChangeinFairValueofAssetsandLiabilities	13000000	USD
CY2018	ambc	Variable Interest Entity Changein Fair Valueof Assetsand Liabilities VariableInterestEntityChangeinFairValueofAssetsandLiabilities	3000000	USD
CY2017	ambc	Variable Interest Entity Changein Fair Valueof Assetsand Liabilities VariableInterestEntityChangeinFairValueofAssetsandLiabilities	20000000	USD
CY2017	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Before Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionBeforeTax	0	USD
CY2019	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	15000000	USD
CY2018	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	0	USD
CY2017	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	0	USD
CY2019	ambc	Variable Interest Entities Deconsolidation Gain Loss VariableInterestEntitiesDeconsolidationGainLoss	-2000000	USD
CY2018	ambc	Variable Interest Entities Deconsolidation Gain Loss VariableInterestEntitiesDeconsolidationGainLoss	2000000	USD
CY2017	ambc	Variable Interest Entities Deconsolidation Gain Loss VariableInterestEntitiesDeconsolidationGainLoss	0	USD
CY2019	us-gaap	Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax	38000000	USD
CY2018	us-gaap	Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax	3000000	USD
CY2017	us-gaap	Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax	20000000	USD
CY2019	us-gaap	Variable Interest Entity Initial Consolidation Gain Or Loss VariableInterestEntityInitialConsolidationGainOrLoss	15000000	USD
CY2019Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Assets VariableInterestEntityConsolidatedCarryingAmountAssets	292000000	USD
CY2019Q4	us-gaap	Variable Interest Entity Consolidated Carrying Amount Liabilities VariableInterestEntityConsolidatedCarryingAmountLiabilities	364000000	USD
CY2019Q4	ambc	Deconsolidated Vie Assets DeconsolidatedVIEAssets	1233000000	USD
CY2019Q4	ambc	Deconsolidated Vie Liabilities DeconsolidatedVIELiabilities	1230000000	USD
CY2019Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	31506000000	USD
CY2019Q4	ambc	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Assets VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets	2247000000	USD
CY2019Q4	ambc	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities	1083000000	USD
CY2019Q4	ambc	Variable Interest Entity Nonconsolidated Carrying Amount Derivative Net Assets Or Liabilities VariableInterestEntityNonconsolidatedCarryingAmountDerivativeNetAssetsOrLiabilities	7000000	USD
CY2018Q4	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	35566000000	USD
CY2018Q4	ambc	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Assets VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets	2258000000	USD
CY2018Q4	ambc	Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities	1434000000	USD
CY2019Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	3000000	USD
CY2018Q4	us-gaap	Equity Method Investments Fair Value Disclosure EquityMethodInvestmentsFairValueDisclosure	5000000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	46000000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	40000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-49000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	168000000	USD
CY2019	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	78000000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	91000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	42000000	USD
CY2017Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-52000000	USD
CY2017Q4	us-gaap	New Accounting Pronouncement Or Change In Accounting Principle Cumulative Effect Of Change On Equity Or Net Assets1 NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1	-3000000	USD
CY2017Q4	ambc	Accumulated Other Comprehensive Income Loss Restated AccumulatedOtherComprehensiveIncomeLossRestated	-55000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	87000000	USD
CY2018	us-gaap	Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax	81000000	USD
CY2018Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-49000000	USD
CY2018	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	6000000	USD
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	45555400	shares
CY2019	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax	0	USD
CY2013Q2	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Class Of Warrant Or Right Outstanding ClassOfWarrantOrRightOutstanding	4877783	shares
CY2013Q2	us-gaap	Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1 ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1	16.67
CY2019Q4	ambc	Warrant Exercised During Period Shares WarrantExercisedDuringPeriodShares	0	shares
CY2017	ambc	Warrant Exercised During Period Shares WarrantExercisedDuringPeriodShares	194	shares
CY2016	ambc	Warrant Exercised During Period Shares WarrantExercisedDuringPeriodShares	0	shares
CY2019Q4	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2017	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	194	shares
CY2016	us-gaap	Stock Issued During Period Shares New Issues StockIssuedDuringPeriodSharesNewIssues	0	shares
CY2015Q2	ambc	First Warrant Buyback Authorization Dollars FirstWarrantBuybackAuthorizationDollars	10000000	USD
CY2016Q4	ambc	Second Warrant Buy Back Authorized Dollars SecondWarrantBuyBackAuthorizedDollars	10000000	USD
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	us-gaap	Payments For Repurchase Of Warrants PaymentsForRepurchaseOfWarrants	8000000	USD
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CY2019Q1	ambc	Remaining Warrant Buy Back Authorized Dollars RemainingWarrantBuyBackAuthorizedDollars	12000000	USD
CY2018Q3	ambc	Amps Exchange Total Warrants Issued AMPSExchangeTotalWarrantsIssued	824307
CY2018Q3	ambc	Amps Exchange Total Warrants Issued Cost Per Share AMPSExchangeTotalWarrantsIssuedCostPerShare	9.72

CY2018

ambc

Changein Impactof Amt Repealon Current Taxes

ChangeinImpactofAMTRepealonCurrentTaxes

1902000

USD

CY2017

ambc

Impactof Amt Repealon Current Taxes

ImpactofAMTRepealonCurrentTaxes

29581000

USD

CY2017

ambc

Impactofnew Tax Lawon Deferred Taxes

ImpactofnewTaxLawonDeferredTaxes

31418000

USD

CY2017

ambc

Net Impactof New Tax Law

NetImpactofNewTaxLaw

1886000

USD

CY2019

dei

Amendment Flag

AmendmentFlag

false

CY2018

ambc

Amt Installment Payment End Date

AMTInstallmentPaymentEndDate

2021-12-31

CY2018Q4

ambc

Amt Receivable Resultingfrom Tcja

AMTReceivableResultingfromTCJA

37019000

USD

CY2017

ambc

Amt Relatedto Filingof2017 Tax Return

AMTRelatedtoFilingof2017TaxReturn

5536000

USD

CY2019

dei

Current Fiscal Year End Date

CurrentFiscalYearEndDate

--12-31

CY2019

dei

Document Fiscal Period Focus

DocumentFiscalPeriodFocus

FY

CY2019

dei

Document Fiscal Year Focus

DocumentFiscalYearFocus

2019

CY2019

dei

Document Period End Date

DocumentPeriodEndDate

2019-12-31

CY2019

dei

Entity Central Index Key

EntityCentralIndexKey

0000874501

CY2019

dei

Entity Emerging Growth Company

EntityEmergingGrowthCompany

false

CY2019

dei

Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

CY2019

dei

Entity Shell Company

EntityShellCompany

false

CY2019

dei

Entity Small Business

EntitySmallBusiness

false

CY2018Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2019Q4

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2018Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

130000000

shares

CY2019Q4

us-gaap

Common Stock Shares Authorized

CommonStockSharesAuthorized

130000000

shares

CY2018Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

45365170

shares

CY2019Q4

us-gaap

Common Stock Shares Issued

CommonStockSharesIssued

45571743

shares

CY2018Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

45336278

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CY2017

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Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Tax

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0

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CY2018Q4

us-gaap

Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.01

CY2019Q4

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Preferred Stock Par Or Stated Value Per Share

PreferredStockParOrStatedValuePerShare

0.01

CY2018Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

20000000

shares

CY2019Q4

us-gaap

Preferred Stock Shares Authorized

PreferredStockSharesAuthorized

20000000

shares

CY2018Q4

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Preferred Stock Shares Issued

PreferredStockSharesIssued

0

shares

CY2019Q4

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Preferred Stock Shares Issued

PreferredStockSharesIssued

0

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CY2018Q4

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Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2019Q4

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Preferred Stock Shares Outstanding

PreferredStockSharesOutstanding

0

shares

CY2018Q4

us-gaap

Treasury Stock Shares

TreasuryStockShares

28892

shares

CY2019Q4

us-gaap

Treasury Stock Shares

TreasuryStockShares

16343

shares

CY2019

dei

Document Type

DocumentType

10-K

CY2019

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Document Annual Report

DocumentAnnualReport

true

CY2019

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Document Transition Report

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false

CY2019

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Entity File Number

EntityFileNumber

1-10777

CY2019

dei

Entity Registrant Name

EntityRegistrantName

AMBAC FINANCIAL GROUP INC

CY2019

dei

Entity Incorporation State Country Code

EntityIncorporationStateCountryCode

DE

CY2019

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Entity Tax Identification Number

EntityTaxIdentificationNumber

13-3621676

CY2019

dei

Entity Address Address Line1

EntityAddressAddressLine1

One World Trade Center

CY2019

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Entity Address City Or Town

EntityAddressCityOrTown

New York

CY2019

dei

Entity Address State Or Province

EntityAddressStateOrProvince

NY

CY2019

dei

Entity Address Postal Zip Code

EntityAddressPostalZipCode

10007

CY2019

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City Area Code

CityAreaCode

(212)

CY2019

dei

Local Phone Number

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658-7470

CY2019

dei

Entity Well Known Seasoned Issuer

EntityWellKnownSeasonedIssuer

Yes

CY2019

dei

Entity Voluntary Filers

EntityVoluntaryFilers

No

CY2019

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Entity Current Reporting Status

EntityCurrentReportingStatus

Yes

CY2019

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Entity Interactive Data Current

EntityInteractiveDataCurrent

Yes

CY2013Q2

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2020Q1

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Entity Common Stock Shares Outstanding

EntityCommonStockSharesOutstanding

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CY2019

dei

Entity Filer Category

EntityFilerCategory

Large Accelerated Filer

CY2019

dei

Entity Small Business

EntitySmallBusiness

false

CY2019

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Entity Emerging Growth Company

EntityEmergingGrowthCompany

false

CY2018Q2

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Entity Public Float

EntityPublicFloat

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CY2019Q4

us-gaap

Other Short Term Investments

OtherShortTermInvestments

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CY2018Q4

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Other Short Term Investments

OtherShortTermInvestments

430000000

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CY2019Q4

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Other Investments

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CY2018Q4

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Other Investments

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391000000

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CY2019Q4

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Investments

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CY2018Q4

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Investments

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CY2019Q4

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Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

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CY2018Q4

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Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

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CY2019Q4

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Restricted Cash

RestrictedCash

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CY2018Q4

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Restricted Cash

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CY2019Q4

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Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

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CY2018Q4

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Premiums Receivable At Carrying Value

PremiumsReceivableAtCarryingValue

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CY2019Q4

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Reinsurance Recoverables

ReinsuranceRecoverables

26000000

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CY2018Q4

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Reinsurance Recoverables

ReinsuranceRecoverables

23000000

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CY2019Q4

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Prepaid Reinsurance Premiums

PrepaidReinsurancePremiums

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CY2018Q4

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Prepaid Reinsurance Premiums

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Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

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Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

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CY2019Q4

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Derivative Assets

DerivativeAssets

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CY2018Q4

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Derivative Assets

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CY2019Q4

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Income Taxes Receivable

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CY2018Q4

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Income Taxes Receivable

IncomeTaxesReceivable

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CY2019Q4

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Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

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CY2018Q4

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Intangible Assets Net Excluding Goodwill

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CY2019Q4

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Other Assets

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Other Assets

OtherAssets

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CY2019Q4

us-gaap

Assets

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CY2018Q4

us-gaap

Assets

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CY2019Q4

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Unearned Premiums

UnearnedPremiums

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CY2018Q4

us-gaap

Unearned Premiums

UnearnedPremiums

630000000

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CY2019Q4

us-gaap

Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

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CY2018Q4

us-gaap

Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

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CY2019Q4

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Reinsurance Payable

ReinsurancePayable

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CY2018Q4

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Reinsurance Payable

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33000000

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CY2019Q4

us-gaap

Deferred Income Tax Liabilities Net

DeferredIncomeTaxLiabilitiesNet

32000000

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CY2018Q4

us-gaap

Deferred Income Tax Liabilities Net

DeferredIncomeTaxLiabilitiesNet

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CY2019Q4

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Long Term Debt

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CY2018Q4

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Long Term Debt

LongTermDebt

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CY2019Q4

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Interest Payable Current And Noncurrent

InterestPayableCurrentAndNoncurrent

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CY2018Q4

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Interest Payable Current And Noncurrent

InterestPayableCurrentAndNoncurrent

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CY2019Q4

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Derivative Liabilities

DerivativeLiabilities

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CY2018Q4

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Derivative Liabilities

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CY2019Q4

us-gaap

Other Liabilities

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CY2018Q4

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Other Liabilities

OtherLiabilities

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CY2019Q4

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Liabilities

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CY2018Q4

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Liabilities

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CY2019Q4

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Preferred Stock Value

PreferredStockValue

0

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CY2018Q4

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Preferred Stock Value

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Common Stock Value

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CY2018Q4

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Common Stock Value

CommonStockValue

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CY2019Q4

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Additional Paid In Capital

AdditionalPaidInCapital

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CY2018Q4

us-gaap

Additional Paid In Capital

AdditionalPaidInCapital

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CY2019Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

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CY2018Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

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CY2019Q4

us-gaap

Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

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CY2018Q4

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Retained Earnings Accumulated Deficit

RetainedEarningsAccumulatedDeficit

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CY2019Q4

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Treasury Stock Value

TreasuryStockValue

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CY2018Q4

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Treasury Stock Value

TreasuryStockValue

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CY2019Q4

us-gaap

Stockholders Equity

StockholdersEquity

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CY2018Q4

us-gaap

Stockholders Equity

StockholdersEquity

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CY2019Q4

us-gaap

Minority Interest

MinorityInterest

60000000

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CY2018Q4

us-gaap

Minority Interest

MinorityInterest

41000000

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CY2019Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

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CY2018Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

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CY2019Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

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USD

CY2018Q4

us-gaap

Liabilities And Stockholders Equity

LiabilitiesAndStockholdersEquity

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USD

CY2019

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

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USD

CY2018

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

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CY2017

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

175000000

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CY2019

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

196000000

USD

CY2018

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

271000000

USD

CY2017

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

338000000

USD

CY2019

ambc

Other Investment Income

OtherInvestmentIncome

32000000

USD

CY2018

ambc

Other Investment Income

OtherInvestmentIncome

2000000

USD

CY2017

ambc

Other Investment Income

OtherInvestmentIncome

23000000

USD

CY2019

us-gaap

Net Investment Income

NetInvestmentIncome

227000000

USD

CY2018

us-gaap

Net Investment Income

NetInvestmentIncome

273000000

USD

CY2017

us-gaap

Net Investment Income

NetInvestmentIncome

361000000

USD

CY2019

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

0

USD

CY2018

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

3000000

USD

CY2017

us-gaap

Impairment Of Investments

ImpairmentOfInvestments

55000000

USD

CY2019

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest

0

USD

CY2018

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest

0

USD

CY2017

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterest

-34000000

USD

CY2019

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

0

USD

CY2018

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

3000000

USD

CY2017

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

20000000

USD

CY2019

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

81000000

USD

CY2018

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

112000000

USD

CY2017

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

5000000

USD

CY2019

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-50000000

USD

CY2018

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

7000000

USD

CY2017

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

76000000

USD

CY2019

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

0

USD

CY2018

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

3000000

USD

CY2017

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

5000000

USD

CY2019

us-gaap

Other Income

OtherIncome

134000000

USD

CY2018

us-gaap

Other Income

OtherIncome

5000000

USD

CY2017

us-gaap

Other Income

OtherIncome

0

USD

CY2019

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

38000000

USD

CY2018

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

3000000

USD

CY2017

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

20000000

USD

CY2019

us-gaap

Revenues

496000000

USD

CY2018

us-gaap

Revenues

511000000

USD

CY2017

us-gaap

Revenues

622000000

USD

CY2019

us-gaap

Incurred Claims Financial Guarantee Insurance Contracts

IncurredClaimsFinancialGuaranteeInsuranceContracts

13000000

USD

CY2018

us-gaap

Incurred Claims Financial Guarantee Insurance Contracts

IncurredClaimsFinancialGuaranteeInsuranceContracts

-224000000

USD

CY2017

us-gaap

Incurred Claims Financial Guarantee Insurance Contracts

IncurredClaimsFinancialGuaranteeInsuranceContracts

513000000

USD

CY2019

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

295000000

USD

CY2018

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

107000000

USD

CY2017

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

151000000

USD

CY2019

us-gaap

Other Underwriting Expense

OtherUnderwritingExpense

103000000

USD

CY2018

us-gaap

Other Underwriting Expense

OtherUnderwritingExpense

112000000

USD

CY2017

us-gaap

Other Underwriting Expense

OtherUnderwritingExpense

122000000

USD

CY2019

us-gaap

Interest Expense Debt

InterestExpenseDebt

269000000

USD

CY2018

us-gaap

Interest Expense Debt

InterestExpenseDebt

242000000

USD

CY2017

us-gaap

Interest Expense Debt

InterestExpenseDebt

120000000

USD

CY2019

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

680000000

USD

CY2018

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

238000000

USD

CY2017

us-gaap

Benefits Losses And Expenses

BenefitsLossesAndExpenses

906000000

USD

CY2019

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-183000000

USD

CY2018

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

273000000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-284000000

USD

CY2019

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

32000000

USD

CY2018

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

5000000

USD

CY2017

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

44000000

USD

CY2019

us-gaap

Profit Loss

ProfitLoss

-216000000

USD

CY2018

us-gaap

Profit Loss

ProfitLoss

267000000

USD

CY2017

us-gaap

Profit Loss

ProfitLoss

-329000000

USD

CY2019

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

0

USD

CY2018

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

82000000

USD

CY2017

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

0

USD

CY2019

us-gaap

Net Income Loss

NetIncomeLoss

-216000000

USD

CY2018

us-gaap

Net Income Loss

NetIncomeLoss

186000000

USD

CY2017

us-gaap

Net Income Loss

NetIncomeLoss

-329000000

USD

CY2019

us-gaap

Profit Loss

ProfitLoss

-216000000

USD

CY2018

us-gaap

Profit Loss

ProfitLoss

267000000

USD

CY2017

us-gaap

Profit Loss

ProfitLoss

-329000000

USD

CY2019

us-gaap

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

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

65000000

USD

CY2018

us-gaap

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

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

55000000

USD

CY2017

us-gaap

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

OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax

-82000000

USD

CY2019

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

26000000

USD

CY2018

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

-48000000

USD

CY2017

us-gaap

Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax

OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax

74000000

USD

CY2019

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax

0

USD

CY2018

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax

-1000000

USD

CY2017

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionAfterTax

0

USD

CY2019

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

1000000

USD

CY2018

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

2000000

USD

CY2017

us-gaap

Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax

OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax

-1000000

USD

CY2019

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

91000000

USD

CY2018

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

6000000

USD

CY2017

us-gaap

Other Comprehensive Income Loss Net Of Tax

OtherComprehensiveIncomeLossNetOfTax

-7000000

USD

CY2019

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-125000000

USD

CY2018

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

274000000

USD

CY2017

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-335000000

USD

CY2019

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

0

USD

CY2018

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

82000000

USD

CY2017

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

0

USD

CY2019

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-125000000

USD

CY2018

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

192000000

USD

CY2017

us-gaap

Comprehensive Income Net Of Tax

ComprehensiveIncomeNetOfTax

-335000000

USD

CY2019

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-4.69

CY2018

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

4.07

CY2017

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-7.25

CY2019

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-4.69

CY2018

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

3.99

CY2017

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

-7.25

CY2018

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45954908

shares

CY2017

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45665883

shares

CY2016

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45367932

shares

CY2018

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

45954908

shares

CY2017

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

46559835

shares

CY2016

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

45367932

shares

CY2018Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1633000000

USD

CY2019

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-125000000

USD

CY2019

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

12000000

USD

CY2019

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-3000000

USD

CY2019

ambc

Amps Impacton Stockholders Equity

AMPSImpactonStockholdersEquity

19000000

USD

CY2019Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1536000000

USD

CY2017Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1645000000

USD

CY2018

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

274000000

USD

CY2018

us-gaap

New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification

NewAccountingPronouncementOrChangeInAccountingPrincipleEffectOfAdoptionQuantification

0

USD

CY2018

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

12000000

USD

CY2018

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-1000000

USD

CY2018

ambc

Amps Impacton Stockholders Equity

AMPSImpactonStockholdersEquity

-297000000

USD

CY2018Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1633000000

USD

CY2016Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1978000000

USD

CY2017

us-gaap

Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest

ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest

-335000000

USD

CY2017

us-gaap

Allocated Share Based Compensation Expense

AllocatedShareBasedCompensationExpense

4000000

USD

CY2017

us-gaap

Stock Issued During Period Value Share Based Compensation

StockIssuedDuringPeriodValueShareBasedCompensation

-2000000

USD

CY2017Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1645000000

USD

CY2019

us-gaap

Net Income Loss

NetIncomeLoss

-216000000

USD

CY2018

us-gaap

Net Income Loss

NetIncomeLoss

186000000

USD

CY2017

us-gaap

Net Income Loss

NetIncomeLoss

-329000000

USD

CY2019

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

0

USD

CY2018

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

82000000

USD

CY2019

us-gaap

Profit Loss

ProfitLoss

-216000000

USD

CY2018

us-gaap

Profit Loss

ProfitLoss

267000000

USD

CY2017

us-gaap

Profit Loss

ProfitLoss

-329000000

USD

CY2019

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

0

USD

CY2018

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

1000000

USD

CY2017

us-gaap

Depreciation Amortization And Accretion Net

DepreciationAmortizationAndAccretionNet

1000000

USD

CY2019

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

63000000

USD

CY2018

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

137000000

USD

CY2017

us-gaap

Accretion Amortization Of Discounts And Premiums Investments

AccretionAmortizationOfDiscountsAndPremiumsInvestments

183000000

USD

CY2019

us-gaap

Share Based Compensation

ShareBasedCompensation

12000000

USD

CY2018

us-gaap

Share Based Compensation

ShareBasedCompensation

12000000

USD

CY2017

us-gaap

Share Based Compensation

ShareBasedCompensation

4000000

USD

CY2019

us-gaap

Increase Decrease In Deferred Income Taxes

IncreaseDecreaseInDeferredIncomeTaxes

-1000000

USD

CY2018

us-gaap

Increase Decrease In Deferred Income Taxes

IncreaseDecreaseInDeferredIncomeTaxes

-7000000

USD

CY2017

us-gaap

Increase Decrease In Deferred Income Taxes

IncreaseDecreaseInDeferredIncomeTaxes

-32000000

USD

CY2019

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

35000000

USD

CY2018

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

-35000000

USD

CY2017

us-gaap

Increase Decrease In Accrued Income Taxes Payable

IncreaseDecreaseInAccruedIncomeTaxesPayable

-26000000

USD

CY2019

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-132000000

USD

CY2018

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-163000000

USD

CY2017

us-gaap

Increase Decrease In Unearned Premiums

IncreaseDecreaseInUnearnedPremiums

-168000000

USD

CY2019

us-gaap

Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve

IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve

364000000

USD

CY2018

us-gaap

Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve

IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve

1633000000

USD

CY2017

us-gaap

Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve

IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve

-400000000

USD

CY2019

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

-4000000

USD

CY2018

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

-5000000

USD

CY2017

us-gaap

Increase Decrease In Reinsurance Payables

IncreaseDecreaseInReinsurancePayables

-5000000

USD

CY2019

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-77000000

USD

CY2018

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-91000000

USD

CY2017

us-gaap

Increase Decrease In Premiums Receivable

IncreaseDecreaseInPremiumsReceivable

-77000000

USD

CY2019

us-gaap

Increase Decrease In Interest Payable Net

IncreaseDecreaseInInterestPayableNet

87000000

USD

CY2018

us-gaap

Increase Decrease In Interest Payable Net

IncreaseDecreaseInInterestPayableNet

9000000

USD

CY2017

us-gaap

Increase Decrease In Interest Payable Net

IncreaseDecreaseInInterestPayableNet

50000000

USD

CY2019

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

295000000

USD

CY2018

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

107000000

USD

CY2017

us-gaap

Amortization Of Intangible Assets

AmortizationOfIntangibleAssets

151000000

USD

CY2019

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

1000000

USD

CY2018

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

-1000000

USD

CY2017

us-gaap

Unrealized Gain Loss On Derivatives

UnrealizedGainLossOnDerivatives

15000000

USD

CY2019

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

81000000

USD

CY2018

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

112000000

USD

CY2017

us-gaap

Realized Investment Gains Losses

RealizedInvestmentGainsLosses

5000000

USD

CY2019

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities

0

USD

CY2018

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities

3000000

USD

CY2017

us-gaap

Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent Availableforsale Securities

OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities

20000000

USD

CY2019

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

0

USD

CY2018

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

3000000

USD

CY2017

us-gaap

Gains Losses On Extinguishment Of Debt

GainsLossesOnExtinguishmentOfDebt

5000000

USD

CY2019

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

38000000

USD

CY2018

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

3000000

USD

CY2017

us-gaap

Variable Interest Entity Activity Between Vie And Entity Operating Income Or Loss

VariableInterestEntityActivityBetweenVIEAndEntityOperatingIncomeOrLoss

20000000

USD

CY2019

us-gaap

Increase Decrease In Derivative Assets And Liabilities

IncreaseDecreaseInDerivativeAssetsAndLiabilities

1000000

USD

CY2018

us-gaap

Increase Decrease In Derivative Assets And Liabilities

IncreaseDecreaseInDerivativeAssetsAndLiabilities

17000000

USD

CY2017

us-gaap

Increase Decrease In Derivative Assets And Liabilities

IncreaseDecreaseInDerivativeAssetsAndLiabilities

223000000

USD

CY2019

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-80000000

USD

CY2018

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-67000000

USD

CY2017

us-gaap

Increase Decrease In Other Operating Capital Net

IncreaseDecreaseInOtherOperatingCapitalNet

-22000000

USD

CY2019

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-311000000

USD

CY2018

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-1543000000

USD

CY2017

us-gaap

Net Cash Provided By Used In Operating Activities

NetCashProvidedByUsedInOperatingActivities

-221000000

USD

CY2019

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

1212000000

USD

CY2018

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

1248000000

USD

CY2017

us-gaap

Proceeds From Sale Of Available For Sale Securities

ProceedsFromSaleOfAvailableForSaleSecurities

2139000000

USD

CY2019

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

379000000

USD

CY2018

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

432000000

USD

CY2017

us-gaap

Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities

ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities

814000000

USD

CY2019

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

959000000

USD

CY2018

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

528000000

USD

CY2017

us-gaap

Payments To Acquire Available For Sale Securities

PaymentsToAcquireAvailableForSaleSecurities

2054000000

USD

CY2019

us-gaap

Proceeds From Sale And Maturity Of Other Investments

ProceedsFromSaleAndMaturityOfOtherInvestments

81000000

USD

CY2018

us-gaap

Proceeds From Sale And Maturity Of Other Investments

ProceedsFromSaleAndMaturityOfOtherInvestments

159000000

USD

CY2017

us-gaap

Proceeds From Sale And Maturity Of Other Investments

ProceedsFromSaleAndMaturityOfOtherInvestments

350000000

USD

CY2019

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

137000000

USD

CY2018

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

140000000

USD

CY2017

us-gaap

Payments To Acquire Other Investments

PaymentsToAcquireOtherInvestments

299000000

USD

CY2019

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

218000000

USD

CY2018

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

-127000000

USD

CY2017

us-gaap

Payments For Proceeds From Short Term Investments

PaymentsForProceedsFromShortTermInvestments

127000000

USD

CY2019

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

100000000

USD

CY2018

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

-58000000

USD

CY2017

us-gaap

Increase Decrease Cash Collateral From Counterparties

IncreaseDecreaseCashCollateralFromCounterparties

123000000

USD

CY2019

ambc

Proceeds From Financial Guaranty Variable Interest Entity Assets

ProceedsFromFinancialGuarantyVariableInterestEntityAssets

543000000

USD

CY2018

ambc

Proceeds From Financial Guaranty Variable Interest Entity Assets

ProceedsFromFinancialGuarantyVariableInterestEntityAssets

349000000

USD

CY2017

ambc

Proceeds From Financial Guaranty Variable Interest Entity Assets

ProceedsFromFinancialGuarantyVariableInterestEntityAssets

235000000

USD

CY2019

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

2000000

USD

CY2018

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

0

USD

CY2017

us-gaap

Payments For Proceeds From Other Investing Activities

PaymentsForProceedsFromOtherInvestingActivities

17000000

USD

CY2019

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

1000000000

USD

CY2018

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

1588000000

USD

CY2017

us-gaap

Net Cash Provided By Used In Investing Activities

NetCashProvidedByUsedInInvestingActivities

1163000000

USD

CY2018

ambc

Proceeds From Issuanceof Tier Ii Notes

ProceedsFromIssuanceofTierIINotes

240000000

USD

CY2019

ambc

Proceeds From Issuanceof Ambac Uk Debt

ProceedsFromIssuanceofAmbacUKDebt

12000000

USD

CY2019

ambc

Proceedsfrom Saleof Senior Surplus Notes

ProceedsfromSaleofSeniorSurplusNotes

0

USD

CY2018

ambc

Proceedsfrom Saleof Senior Surplus Notes

ProceedsfromSaleofSeniorSurplusNotes

24000000

USD

CY2019

ambc

Paydownof Ambac Note

PaydownofAmbacNote

178000000

USD

CY2018

ambc

Paydownof Ambac Note

PaydownofAmbacNote

214000000

USD

CY2019

ambc

Paydown Of Variable Interest Entity Secured Borrowing

PaydownOfVariableInterestEntitySecuredBorrowing

0

USD

CY2018

ambc

Paydown Of Variable Interest Entity Secured Borrowing

PaydownOfVariableInterestEntitySecuredBorrowing

74000000

USD

CY2017

ambc

Paydown Of Variable Interest Entity Secured Borrowing

PaydownOfVariableInterestEntitySecuredBorrowing

29000000

USD

CY2017

ambc

Payments From Drawdowns Of Borrowings Under Guaranteed Investment Agreements

PaymentsFromDrawdownsOfBorrowingsUnderGuaranteedInvestmentAgreements

82000000

USD

CY2019

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

0

USD

CY2018

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

191000000

USD

CY2017

us-gaap

Repayments Of Long Term Debt

RepaymentsOfLongTermDebt

69000000

USD

CY2018

us-gaap

Payments Of Debt Issuance Costs

PaymentsOfDebtIssuanceCosts

9000000

USD

CY2019

ambc

Amps Proceeds

AMPSProceeds

19000000

USD

CY2019

ambc

Amps Exchange Cash Paid

AMPSExchangeCashPaid

0

USD

CY2018

ambc

Amps Exchange Cash Paid

AMPSExchangeCashPaid

11000000

USD

CY2019

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

3000000

USD

CY2018

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

1000000

USD

CY2017

us-gaap

Payments Related To Tax Withholding For Share Based Compensation

PaymentsRelatedToTaxWithholdingForShareBasedCompensation

1000000

USD

CY2019

ambc

Paydownof Financial Guaranty Variable Interest Entity Liabilities

PaydownofFinancialGuarantyVariableInterestEntityLiabilities

542000000

USD

CY2018

ambc

Paydownof Financial Guaranty Variable Interest Entity Liabilities

PaydownofFinancialGuarantyVariableInterestEntityLiabilities

349000000

USD

CY2017

ambc

Paydownof Financial Guaranty Variable Interest Entity Liabilities

PaydownofFinancialGuarantyVariableInterestEntityLiabilities

230000000

USD

CY2019

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-691000000

USD

CY2018

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-585000000

USD

CY2017

us-gaap

Net Cash Provided By Used In Financing Activities

NetCashProvidedByUsedInFinancingActivities

-412000000

USD

CY2019

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

0

USD

CY2018

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

0

USD

CY2017

us-gaap

Effect Of Exchange Rate On Cash And Cash Equivalents

EffectOfExchangeRateOnCashAndCashEquivalents

-1000000

USD

CY2019

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-2000000

USD

CY2018

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

-541000000

USD

CY2017

us-gaap

Cash And Cash Equivalents Period Increase Decrease

CashAndCashEquivalentsPeriodIncreaseDecrease

529000000

USD

CY2018Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

83000000

USD

CY2017Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

625000000

USD

CY2016Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

96000000

USD

CY2019Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

81000000

USD

CY2018Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

83000000

USD

CY2017Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

625000000

USD

CY2019

dei

Entity Incorporation Date Of Incorporation

EntityIncorporationDateOfIncorporation

1991-04-29

CY2014

ambc

Common Stock Voting Restrictions

CommonStockVotingRestrictions

0.10

CY2014

ambc

Common Stock Voting Restriction Less One Vote

CommonStockVotingRestrictionLessOneVote

0.10

CY2014

ambc

Common Stock Transfer Restrictions

CommonStockTransferRestrictions

0.05

CY2014

ambc

Common Stock Additional Transfer Restrictions

CommonStockAdditionalTransferRestrictions

0.05

CY2018Q1

ambc

Satisfactionanddischargeofsegregatedaccountdeferredamountsanddeferredinterest

3857000000

USD

CY2018Q1

ambc

Cancellationof Surplus Notes Principal

CancellationofSurplusNotesPrincipal

552000000

USD

CY2018Q1

ambc

Cancellationof Surplus Notes Accrued Interest

CancellationofSurplusNotesAccruedInterest

257000000

USD

CY2017Q4

ambc

Amountof Senior Surplus Notes Outstandingon June82020

AmountofSeniorSurplusNotesOutstandingonJune82020

0.25

CY2019Q4

ambc

Market Valueof Secured Note Collateral

MarketValueofSecuredNoteCollateral

197000000

USD

CY2018Q1

ambc

Tier2 Notes

Tier2Notes

240000000

USD

CY2018Q1

ambc

Tier2 Note Securityin Rmbs Litigation Settlement Proceeds

Tier2NoteSecurityinRMBSLitigationSettlementProceeds

1600000000

USD

CY2018Q2

us-gaap

Minority Interest

MinorityInterest

264000000

USD

CY2018Q3

ambc

Amps Liquidation Preference Value Per Share

AMPSLiquidationPreferenceValuePerShare

25000

CY2018Q3

ambc

Amps Exchange Surplus Notes Issued Per Share

AMPSExchangeSurplusNotesIssuedPerShare

13875

CY2018Q3

ambc

Amps Exchange Shares Tendered

AMPSExchangeSharesTendered

22096

shares

CY2018Q3

ambc

Amps Exchange Cash Paid Per Share

AMPSExchangeCashPaidPerShare

500

CY2018Q3

ambc

Amps Exchange Warrants Issued Per Share

AMPSExchangeWarrantsIssuedPerShare

37.3076

CY2013Q2

us-gaap

Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1

ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

16.67

CY2018Q3

ambc

Amps Exchange Percent Acquired

AMPSExchangePercentAcquired

0.844

CY2018Q3

ambc

Amps Exchange Shares Acquired

AMPSExchangeSharesAcquired

22296

shares

CY2018Q3

ambc

Amps Exchange Aggregated Liquidation Preference

AMPSExchangeAggregatedLiquidationPreference

557000000

USD

CY2018Q3

ambc

Amps Exchange Nominal Discount

AMPSExchangeNominalDiscount

227000000

USD

CY2018Q3

ambc

Amps Exchange Nominal Discountat Fair Value

AMPSExchangeNominalDiscountatFairValue

253000000

USD

CY2018Q3

ambc

Amps Exchange Aggregated Liquidation Preference

AMPSExchangeAggregatedLiquidationPreference

557000000

USD

CY2018Q3

ambc

Amps Exchange Total Surplus Notes Issued

AMPSExchangeTotalSurplusNotesIssued

213000000

USD

CY2018Q3

ambc

Amps Exchange Interest Includedin Surplus Notes Issued

AMPSExchangeInterestIncludedinSurplusNotesIssued

98000000

USD

CY2018Q3

ambc

Amps Exchange Total Warrants Issued

AMPSExchangeTotalWarrantsIssued

824307

CY2018

ambc

Amps Exchange Cash Paid

AMPSExchangeCashPaid

11000000

USD

CY2018

ambc

Amps Exchange Loss Basedon Carry Value

AMPSExchangeLossBasedonCarryValue

82000000

USD

CY2019Q4

us-gaap

Minority Interest

MinorityInterest

60000000

USD

CY2018Q4

us-gaap

Minority Interest

MinorityInterest

41000000

USD

CY2019Q4

ambc

Estimated Future Premium Payments Weighted Average Discounted Rate

EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate

0.024

CY2018Q4

ambc

Estimated Future Premium Payments Weighted Average Discounted Rate

EstimatedFuturePremiumPaymentsWeightedAverageDiscountedRate

0.027

CY2019

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1

P8Y6M

CY2018

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumReceivedOverContractPeriodPremiumReceivableWeightedAverageCollectionPeriod1

P8Y8M12D

CY2019Q4

us-gaap

Minority Interest

MinorityInterest

60000000

USD

CY2018Q4

us-gaap

Minority Interest

MinorityInterest

41000000

USD

CY2019

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

12000000

USD

CY2018

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

-7000000

USD

CY2017

us-gaap

Foreign Currency Transaction Gain Loss Before Tax

ForeignCurrencyTransactionGainLossBeforeTax

21000000

USD

CY2019

us-gaap

Income Taxes Paid

IncomeTaxesPaid

21000000

USD

CY2018

us-gaap

Income Taxes Paid

IncomeTaxesPaid

35000000

USD

CY2017

us-gaap

Income Taxes Paid

IncomeTaxesPaid

40000000

USD

CY2018Q3

ambc

Amps Exchange Carrying Valueof Surplus Notes Issued

AMPSExchangeCarryingValueofSurplusNotesIssued

187000000

USD

CY2017

ambc

Decreaseinlongtermdebtasaresultofanexchangeforinvestmentsecurities

55000000

USD

CY2018Q4

ambc

Non Cash Impactof Rehabilitation Exit Transaction

NonCashImpactofRehabilitationExitTransaction

1919000000

USD

CY2019Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

24000000

USD

CY2018Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

63000000

USD

CY2017Q4

us-gaap

Cash And Cash Equivalents At Carrying Value

CashAndCashEquivalentsAtCarryingValue

624000000

USD

CY2019Q4

us-gaap

Restricted Cash

RestrictedCash

55000000

USD

CY2018Q4

us-gaap

Restricted Cash

RestrictedCash

19000000

USD

CY2019Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

81000000

USD

CY2018Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

83000000

USD

CY2017Q4

us-gaap

Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents

CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents

625000000

USD

CY2019

us-gaap

Prior Period Reclassification Adjustment Description

PriorPeriodReclassificationAdjustmentDescription

<div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;font-weight:bold;">Reclassifications and Rounding</span></div><div style="line-height:120%;padding-bottom:12px;padding-top:0px;text-align:justify;font-size:9pt;"><span style="font-family:inherit;font-size:9pt;">Reclassifications may have been made to prior years' amounts to conform to the current year's presentation. Certain amounts and tables in the consolidated financial statements and associated notes may not add due to rounding.</span></div>

CY2018Q4

us-gaap

Operating Lease Liability

OperatingLeaseLiability

15000000

USD

CY2019

ambc

Variable Interest Entity Changein Fair Valueof Assetsand Liabilities

VariableInterestEntityChangeinFairValueofAssetsandLiabilities

13000000

USD

CY2018

ambc

Variable Interest Entity Changein Fair Valueof Assetsand Liabilities

VariableInterestEntityChangeinFairValueofAssetsandLiabilities

3000000

USD

CY2017

ambc

Variable Interest Entity Changein Fair Valueof Assetsand Liabilities

VariableInterestEntityChangeinFairValueofAssetsandLiabilities

20000000

USD

CY2017

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Reclassification Adjustment From Aoci For Derecognition Before Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionReclassificationAdjustmentFromAociForDerecognitionBeforeTax

0

USD

CY2019

us-gaap

Variable Interest Entity Initial Consolidation Gain Or Loss

VariableInterestEntityInitialConsolidationGainOrLoss

15000000

USD

CY2018

us-gaap

Variable Interest Entity Initial Consolidation Gain Or Loss

VariableInterestEntityInitialConsolidationGainOrLoss

0

USD

CY2017

us-gaap

Variable Interest Entity Initial Consolidation Gain Or Loss

VariableInterestEntityInitialConsolidationGainOrLoss

0

USD

CY2019

ambc

Variable Interest Entities Deconsolidation Gain Loss

VariableInterestEntitiesDeconsolidationGainLoss

-2000000

USD

CY2018

ambc

Variable Interest Entities Deconsolidation Gain Loss

VariableInterestEntitiesDeconsolidationGainLoss

2000000

USD

CY2017

ambc

Variable Interest Entities Deconsolidation Gain Loss

VariableInterestEntitiesDeconsolidationGainLoss

0

USD

CY2019

us-gaap

Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax

VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax

38000000

USD

CY2018

us-gaap

Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax

VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax

3000000

USD

CY2017

us-gaap

Variable Interest Entity Activity Between Vie And Entity Income Or Loss Before Tax

VariableInterestEntityActivityBetweenVIEAndEntityIncomeOrLossBeforeTax

20000000

USD

CY2019

us-gaap

Variable Interest Entity Initial Consolidation Gain Or Loss

VariableInterestEntityInitialConsolidationGainOrLoss

15000000

USD

CY2019Q4

us-gaap

Variable Interest Entity Consolidated Carrying Amount Assets

VariableInterestEntityConsolidatedCarryingAmountAssets

292000000

USD

CY2019Q4

us-gaap

Variable Interest Entity Consolidated Carrying Amount Liabilities

VariableInterestEntityConsolidatedCarryingAmountLiabilities

364000000

USD

CY2019Q4

ambc

Deconsolidated Vie Assets

DeconsolidatedVIEAssets

1233000000

USD

CY2019Q4

ambc

Deconsolidated Vie Liabilities

DeconsolidatedVIELiabilities

1230000000

USD

CY2019Q4

us-gaap

Variable Interest Entity Entity Maximum Loss Exposure Amount

VariableInterestEntityEntityMaximumLossExposureAmount

31506000000

USD

CY2019Q4

ambc

Variable Interest Entity Nonconsolidated Carrying Amount Insurance Assets

VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets

2247000000

USD

CY2019Q4

ambc

Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities

VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities

1083000000

USD

CY2019Q4

ambc

Variable Interest Entity Nonconsolidated Carrying Amount Derivative Net Assets Or Liabilities

VariableInterestEntityNonconsolidatedCarryingAmountDerivativeNetAssetsOrLiabilities

7000000

USD

CY2018Q4

us-gaap

Variable Interest Entity Entity Maximum Loss Exposure Amount

VariableInterestEntityEntityMaximumLossExposureAmount

35566000000

USD

CY2018Q4

ambc

Variable Interest Entity Nonconsolidated Carrying Amount Insurance Assets

VariableInterestEntityNonconsolidatedCarryingAmountInsuranceAssets

2258000000

USD

CY2018Q4

ambc

Variable Interest Entity Nonconsolidated Carrying Amount Insurance Liabilities

VariableInterestEntityNonconsolidatedCarryingAmountInsuranceLiabilities

1434000000

USD

CY2019Q4

us-gaap

Equity Method Investments Fair Value Disclosure

EquityMethodInvestmentsFairValueDisclosure

3000000

USD

CY2018Q4

us-gaap

Equity Method Investments Fair Value Disclosure

EquityMethodInvestmentsFairValueDisclosure

5000000

USD

CY2019Q4

us-gaap

Equity Method Investments

EquityMethodInvestments

46000000

USD

CY2018Q4

us-gaap

Equity Method Investments

EquityMethodInvestments

40000000

USD

CY2018Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-49000000

USD

CY2019

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

168000000

USD

CY2019

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

78000000

USD

CY2019

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

91000000

USD

CY2019Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

42000000

USD

CY2017Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-52000000

USD

CY2017Q4

us-gaap

New Accounting Pronouncement Or Change In Accounting Principle Cumulative Effect Of Change On Equity Or Net Assets1

NewAccountingPronouncementOrChangeInAccountingPrincipleCumulativeEffectOfChangeOnEquityOrNetAssets1

-3000000

USD

CY2017Q4

ambc

Accumulated Other Comprehensive Income Loss Restated

AccumulatedOtherComprehensiveIncomeLossRestated

-55000000

USD

CY2018

us-gaap

Other Comprehensive Income Loss Before Reclassifications Net Of Tax

OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax

87000000

USD

CY2018

us-gaap

Reclassification From Accumulated Other Comprehensive Income Current Period Net Of Tax

ReclassificationFromAccumulatedOtherComprehensiveIncomeCurrentPeriodNetOfTax

81000000

USD

CY2018Q4

us-gaap

Accumulated Other Comprehensive Income Loss Net Of Tax

AccumulatedOtherComprehensiveIncomeLossNetOfTax

-49000000

USD

CY2018

us-gaap

Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent

OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent

6000000

USD

CY2019Q4

us-gaap

Common Stock Shares Outstanding

CommonStockSharesOutstanding

45555400

shares

CY2019

us-gaap

Other Comprehensive Income Loss Financial Liability Fair Value Option Unrealized Gain Loss Arising During Period After Tax

OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionUnrealizedGainLossArisingDuringPeriodAfterTax

0

USD

CY2013Q2

us-gaap

Common Stock Par Or Stated Value Per Share

CommonStockParOrStatedValuePerShare

0.01

CY2019Q4

us-gaap

Class Of Warrant Or Right Outstanding

ClassOfWarrantOrRightOutstanding

4877783

shares

CY2013Q2

us-gaap

Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1

ClassOfWarrantOrRightExercisePriceOfWarrantsOrRights1

16.67

CY2019Q4

ambc

Warrant Exercised During Period Shares

WarrantExercisedDuringPeriodShares

0

shares

CY2017

ambc

Warrant Exercised During Period Shares

WarrantExercisedDuringPeriodShares

194

shares

CY2016

ambc

Warrant Exercised During Period Shares

WarrantExercisedDuringPeriodShares

0

shares

CY2019Q4

us-gaap

Stock Issued During Period Shares New Issues

StockIssuedDuringPeriodSharesNewIssues

0

shares

CY2017

us-gaap

Stock Issued During Period Shares New Issues

StockIssuedDuringPeriodSharesNewIssues

194

shares

CY2016

us-gaap

Stock Issued During Period Shares New Issues

StockIssuedDuringPeriodSharesNewIssues

0

shares

CY2015Q2

ambc

First Warrant Buyback Authorization Dollars

FirstWarrantBuybackAuthorizationDollars

10000000

USD

CY2016Q4

ambc

Second Warrant Buy Back Authorized Dollars

SecondWarrantBuyBackAuthorizedDollars

10000000

USD

ambc

Warrants Purchased Shares

WarrantsPurchasedShares

985331

shares

us-gaap

Payments For Repurchase Of Warrants

PaymentsForRepurchaseOfWarrants

8000000

USD

ambc

Warrants Repurchased Average Costper Warrant

WarrantsRepurchasedAverageCostperWarrant

8.21

CY2019Q1

ambc

Remaining Warrant Buy Back Authorized Dollars

RemainingWarrantBuyBackAuthorizedDollars

12000000

USD

CY2018Q3

ambc

Amps Exchange Total Warrants Issued

AMPSExchangeTotalWarrantsIssued

824307

CY2018Q3

ambc

Amps Exchange Total Warrants Issued Cost Per Share

AMPSExchangeTotalWarrantsIssuedCostPerShare

9.72

CY2018

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45954908

shares

CY2017

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45665883

shares

CY2016

us-gaap

Weighted Average Number Of Shares Outstanding Basic

WeightedAverageNumberOfSharesOutstandingBasic

45367932

shares

CY2018

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

45954908

shares

CY2017

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

46559835

shares

CY2016

us-gaap

Weighted Average Number Of Diluted Shares Outstanding

WeightedAverageNumberOfDilutedSharesOutstanding

45367932

shares

CY2019Q4

ambc

Financial Guarantee Gross Outstanding Principal

FinancialGuaranteeGrossOutstandingPrincipal

43908000000

USD

CY2018Q4

ambc

Financial Guarantee Gross Outstanding Principal

FinancialGuaranteeGrossOutstandingPrincipal

52055000000

USD

CY2019Q4

us-gaap

Participating Policies Amount In Force

ParticipatingPoliciesAmountInForce

38018000000

USD

CY2018Q4

us-gaap

Participating Policies Amount In Force

ParticipatingPoliciesAmountInForce

46927000000

USD

CY2019Q4

us-gaap

Participating Policies Amount In Force

ParticipatingPoliciesAmountInForce

38018000000

USD

CY2018Q4

us-gaap

Participating Policies Amount In Force

ParticipatingPoliciesAmountInForce

46927000000

USD

CY2019Q4

ambc

Financial Guarantee Gross Outstanding Principal And Interest

FinancialGuaranteeGrossOutstandingPrincipalAndInterest

69826000000

USD

CY2018Q4

ambc

Financial Guarantee Gross Outstanding Principal And Interest

FinancialGuaranteeGrossOutstandingPrincipalAndInterest

87543000000

USD

CY2019Q4

ambc

Net Financial Guarantee Principal And Interest In Force

NetFinancialGuaranteePrincipalAndInterestInForce

58245000000

USD

CY2018Q4

ambc

Net Financial Guarantee Principal And Interest In Force

NetFinancialGuaranteePrincipalAndInterestInForce

77972000000

USD

CY2018Q4

ambc

Percentage Of Highest Single Insured Risk Of Aggregate Net Par Amount Guaranteed

PercentageOfHighestSingleInsuredRiskOfAggregateNetParAmountGuaranteed

0.027

CY2019

us-gaap

Premiums Receivable Note

PremiumsReceivableNote

<div style="line-height:120%;padding-bottom:0px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;">Below is the gross premium receivable roll-forward (direct and assumed contracts) for the affected periods:</span></div><div style="line-height:120%;padding-bottom:4px;text-align:left;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="12"/></tr><tr><td style="width:36%;"/><td style="width:1%;"/><td style="width:18%;"/><td style="width:1%;"/><td style="width:2%;"/><td style="width:1%;"/><td style="width:18%;"/><td style="width:1%;"/><td style="width:2%;"/><td style="width:1%;"/><td style="width:18%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Year Ended </span></div><div style="font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">December 31,</span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2019</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2018</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2017</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Beginning premium receivable</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>495</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>586</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>661</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Premium receipts</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(48</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(56</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(82</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Adjustments for changes in expected and contractual cash flows </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(1)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(38</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(42</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(30</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Accretion of premium receivable discount</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>11</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>15</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>16</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Deconsolidation of certain VIEs</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>3</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">—</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">—</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Changes to uncollectable premiums</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(2</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>2</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>—</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Other adjustments (including foreign exchange)</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(6</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(10</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>21</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Ending premium receivable </span><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(2)</sup></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>416</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>495</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>586</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr></table></div><span style="font-family:Times New Roman;font-size:8pt;"><br/></span></div><table cellpadding="0" cellspacing="0" style="padding-bottom:4px;font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">(1)</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">Adjustments for changes in expected and contractual cash flows primarily due to reductions in insured exposure as a result of early policy terminations and unscheduled principal paydowns.</span></div></td></tr></table><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">(2)</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">Premium receivable includes premiums to be received in foreign denominated currencies most notably in British Pounds and Euros. At </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">December 31, 2019, 2018 and 2017</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> premium receivables include British Pounds of </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$129</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> (</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>£97</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">), </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$131</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> (</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>£103</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">) and </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$152</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> (</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>£112</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">), respectively, and Euros of </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$26</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> (</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>€23</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">), </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$31</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> (</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>€27</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">) and </span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>$36</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"> (</span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;"><span>€30</span></span><span style="font-family:Times New Roman;font-size:8pt;color:#000000;">), respectively. </span></div>

CY2018Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumReceivable

495000000

USD

CY2017Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumReceivable

586000000

USD

CY2016Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumReceivable

661000000

USD

CY2019

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Proceeds From Premiums Received

FinancialGuaranteeInsuranceContractsPremiumReceivableProceedsFromPremiumsReceived

-48000000

USD

CY2018

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Proceeds From Premiums Received

FinancialGuaranteeInsuranceContractsPremiumReceivableProceedsFromPremiumsReceived

-56000000

USD

CY2017

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Proceeds From Premiums Received

FinancialGuaranteeInsuranceContractsPremiumReceivableProceedsFromPremiumsReceived

82000000

USD

CY2019

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract

-38000000

USD

CY2018

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract

-42000000

USD

CY2017

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract

-30000000

USD

CY2019

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable

11000000

USD

CY2018

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable

15000000

USD

CY2017

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable

16000000

USD

CY2019

ambc

Financial Guarantee Insurance Contracts Premium Receivable Deconsolidationof Vie

FinancialGuaranteeInsuranceContractsPremiumReceivableDeconsolidationofVIE

3000000

USD

CY2019

us-gaap

Allowance For Doubtful Accounts Receivable Period Increase Decrease

AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease

-2000000

USD

CY2018

us-gaap

Allowance For Doubtful Accounts Receivable Period Increase Decrease

AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease

2000000

USD

CY2017

us-gaap

Allowance For Doubtful Accounts Receivable Period Increase Decrease

AllowanceForDoubtfulAccountsReceivablePeriodIncreaseDecrease

0

USD

CY2019

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments

-6000000

USD

CY2018

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments

-10000000

USD

CY2017

us-gaap

Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Other Adjustments

FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentOtherAdjustments

21000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumReceivable

416000000

USD

CY2018Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumReceivable

495000000

USD

CY2017Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable

FinancialGuaranteeInsuranceContractsPremiumReceivable

586000000

USD

CY2019Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts

PremiumsReceivableAllowanceForDoubtfulAccounts

9000000

USD

CY2018Q4

us-gaap

Premiums Receivable Allowance For Doubtful Accounts

PremiumsReceivableAllowanceForDoubtfulAccounts

7000000

USD

CY2019

us-gaap

Premiums Written Net

PremiumsWrittenNet

-60000000

USD

CY2019

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-28000000

USD

CY2019

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2019

us-gaap

Ceded Premiums Written

CededPremiumsWritten

31000000

USD

CY2018

us-gaap

Premiums Written Net

PremiumsWrittenNet

-41000000

USD

CY2018

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

8000000

USD

CY2019

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

75000000

USD

CY2019

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

0

USD

CY2019

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

10000000

USD

CY2019

us-gaap

Premiums Earned Net

PremiumsEarnedNet

66000000

USD

CY2018

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-24000000

USD

CY2018

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2018

us-gaap

Ceded Premiums Written

CededPremiumsWritten

17000000

USD

CY2018

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

119000000

USD

CY2018

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

0

USD

CY2018

us-gaap

Premiums Earned Net

PremiumsEarnedNet

111000000

USD

CY2017

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-14000000

USD

CY2017

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2017

us-gaap

Ceded Premiums Written

CededPremiumsWritten

-2000000

USD

CY2017

us-gaap

Premiums Written Net

PremiumsWrittenNet

-12000000

USD

CY2017

us-gaap

Direct Premiums Earned

DirectPremiumsEarned

190000000

USD

CY2017

us-gaap

Assumed Premiums Earned

AssumedPremiumsEarned

0

USD

CY2017

us-gaap

Ceded Premiums Earned

CededPremiumsEarned

15000000

USD

CY2017

us-gaap

Premiums Earned Net

PremiumsEarnedNet

175000000

USD

CY2019

us-gaap

Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount

FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount

10000000

USD

CY2018

us-gaap

Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount

FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount

32000000

USD

CY2017

us-gaap

Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount

FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount

64000000

USD

CY2019

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

66000000

USD

CY2018

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

111000000

USD

CY2017

us-gaap

Premiums Earned Net Financial Guarantee Insurance Contracts

PremiumsEarnedNetFinancialGuaranteeInsuranceContracts

175000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringFirstQuarterFollowingBalanceSheetDate

14000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFirstQuarterFollowingBalanceSheetDate

10000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringSecondQuarterFollowingTheBalanceSheetDate

11000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringSecondQuarterFollowingBalanceSheetDate

10000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringThirdQuarterFollowingBalanceSheetDate

10000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringThirdQuarterFollowingBalanceSheetDate

10000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedDuringFourthQuarterFollowingBalanceSheetDate

9000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedDuringFourthQuarterFollowingBalanceSheetDate

10000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanOneAndWithinTwoYearsFromBalanceSheetDate

37000000

USD

CY2019Q4

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

36000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanTwoAndWithinThreeYearsFromBalanceSheetDate

36000000

USD

CY2019Q4

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

34000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanThreeAndWithinFourYearsFromBalanceSheetDate

34000000

USD

CY2019Q4

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

32000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFourAndWithinFiveYearsFromBalanceSheetDate

33000000

USD

CY2019Q4

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

30000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThanFiveAndWithin10YearsFromBalanceSheetDate

143000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThanFiveAndWithin10YearsFromBalanceSheetDate

124000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan10AndWithin15YearsFromBalanceSheetDate

102000000

USD

CY2019Q4

us-gaap

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

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan10AndWithin15YearsFromBalanceSheetDate

82000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than15 And Within20 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan15AndWithin20YearsFromBalanceSheetDate

47000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than15 And Within20 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan15AndWithin20YearsFromBalanceSheetDate

38000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than20 And Within25 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan20AndWithin25YearsFromBalanceSheetDate

22000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than20 And Within25 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan20AndWithin25YearsFromBalanceSheetDate

14000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than25 And Within30 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan25AndWithin30YearsFromBalanceSheetDate

9000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than25 And Within30 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan25AndWithin30YearsFromBalanceSheetDate

5000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Expected To Be Collected More Than30 And Within35 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsPremiumExpectedToBeCollectedMoreThan30AndWithin35YearsFromBalanceSheetDate

1000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized More Than30 And Within35 Years From Balance Sheet Date

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognizedMoreThan30AndWithin35YearsFromBalanceSheetDate

1000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Premium Receivable Premium Expected To Be Collected

FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollected

508000000

USD

CY2019Q4

us-gaap

Financial Guarantee Insurance Contracts Future Expected Premium Revenue To Be Recognized

FinancialGuaranteeInsuranceContractsFutureExpectedPremiumRevenueToBeRecognized

436000000

USD

CY2019Q4

us-gaap

Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

1548000000

USD

CY2019Q4

us-gaap

Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

2029000000

USD

CY2019Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-482000000

USD

CY2018Q4

us-gaap

Liability Net For Claims And Claims Adjustment Expense Financial Guarantee Insurance Contracts

LiabilityNetForClaimsAndClaimsAdjustmentExpenseFinancialGuaranteeInsuranceContracts

1826000000

USD

CY2018Q4

us-gaap

Salvage And Subrogation Recoveries Value

SalvageAndSubrogationRecoveriesValue

1933000000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-107000000

USD

CY2019

us-gaap

Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense

ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense

<div style="line-height:120%;padding-bottom:0px;text-align:justify;font-size:9pt;"><span style="font-family:Times New Roman;font-size:9pt;color:#000000;">Below is the loss and loss expense reserve roll-forward, net of subrogation recoverable and reinsurance, for the affected periods.</span></div><div style="line-height:120%;padding-bottom:4px;text-align:justify;font-size:10pt;"><div style="padding-left:0px;text-indent:0px;line-height:normal;padding-top:10px;"><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman;font-size:10pt;width:100%;border-collapse:collapse;text-align:left;"><tr><td colspan="12"/></tr><tr><td style="width:42%;"/><td style="width:1%;"/><td style="width:16%;"/><td style="width:1%;"/><td style="width:2%;"/><td style="width:1%;"/><td style="width:16%;"/><td style="width:1%;"/><td style="width:2%;"/><td style="width:1%;"/><td style="width:16%;"/><td style="width:1%;"/></tr><tr><td style="vertical-align:top;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Year Ended </span></div><div style="font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">December 31,</span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2019</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2018</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:center;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">2017</span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Beginning gross loss and loss expense reserves</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(107</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>4,114</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">$</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>3,696</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Reinsurance recoverable</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>23</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>41</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>31</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Beginning balance of net loss and loss expense reserves</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(130</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>4,073</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>3,665</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Losses and loss expenses (benefit) incurred:</span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Current year</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>1</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>5</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>6</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Prior years </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(1)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>12</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(228</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>507</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Total </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(2)(3)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>13</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(224</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>513</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Loss and loss expenses (recovered) paid:</span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="3" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Current year</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>—</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>—</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>1</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:12px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Prior years </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(1)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>318</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>3,963</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>133</span></span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Total</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>318</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>3,964</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>134</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Foreign exchange effect</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(1</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(15</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:1px solid #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>29</span></span></div></td><td style="vertical-align:bottom;border-bottom:1px solid #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Ending net loss and loss expense reserves</span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(436</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>(130</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">)</span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>4,073</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Impact of VIE consolidation</span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(72</span></span></div></td><td style="vertical-align:bottom;padding-right:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">—</span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">—</span></div></td><td style="vertical-align:bottom;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Reinsurance recoverable </span><span style="font-family:inherit;font-size:8pt;"><sup style="vertical-align:top;line-height:120%;font-size:5pt">(4)</sup></span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>26</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>23</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;background-color:#cceeff;padding-left:2px;padding-top:2px;padding-bottom:2px;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;"><span>41</span></span></div></td><td style="vertical-align:bottom;background-color:#cceeff;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr><tr><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="text-align:left;padding-left:6px;text-indent:-6px;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">Ending gross loss and loss expense reserves</span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;"><span>(482</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;color:#211aff;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>(107</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-right:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:left;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;">)</span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;padding-right:2px;border-top:1px solid #000000;"><div style="overflow:hidden;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"> </span></div></td><td colspan="2" style="vertical-align:bottom;border-bottom:3px double #000000;padding-left:2px;padding-top:2px;padding-bottom:2px;border-top:1px solid #000000;"><div style="text-align:right;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;font-weight:bold;"><span>4,114</span></span></div></td><td style="vertical-align:bottom;border-bottom:3px double #000000;border-top:1px solid #000000;"><div style="text-align:left;font-size:10pt;"><span style="font-family:inherit;font-size:10pt;"><br/></span></div></td></tr></table></div><span style="font-family:Times New Roman;font-size:8pt;"><br/></span></div><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:inherit;font-size:8pt;">(1)</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">2018 loss and loss expenses (recovered) paid includes the settlement of Deferred Amounts and Interest Accrued on Deferred Amounts in the amount of </span><span style="font-family:inherit;font-size:8pt;"><span>$3,000</span></span><span style="font-family:inherit;font-size:8pt;"> and </span><span style="font-family:inherit;font-size:8pt;"><span>$857</span></span><span style="font-family:inherit;font-size:8pt;">, respectively in connection with the Rehabilitation Exit Transactions through a combination of cash, surplus notes and secured notes. 2018 loss and loss expenses incurred includes a </span><span style="font-family:inherit;font-size:8pt;"><span>$288</span></span><span style="font-family:inherit;font-size:8pt;"> loss and loss expense benefit on these settled Deferred Amounts.</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:inherit;font-size:8pt;">(2)</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Total losses and loss expenses (benefit) includes </span><span style="font-family:inherit;font-size:8pt;"><span>$(7)</span></span><span style="font-family:inherit;font-size:8pt;">, </span><span style="font-family:inherit;font-size:8pt;"><span>$(2)</span></span><span style="font-family:inherit;font-size:8pt;"> and </span><span style="font-family:inherit;font-size:8pt;"><span>$20</span></span><span style="font-family:inherit;font-size:8pt;"> for the years ended </span><span style="font-family:inherit;font-size:8pt;">December 31, 2019, 2018 and 2017</span><span style="font-family:inherit;font-size:8pt;">, respectively, related to ceded reinsurance.</span></div></td></tr></table><table cellpadding="0" cellspacing="0" style="font-family:Times New Roman; font-size:10pt;"><tr><td style="width:24px;"/><td/></tr><tr><td style="vertical-align:top"><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:inherit;font-size:8pt;">(3)</span></div></td><td style="vertical-align:top;"><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Ambac records the impact of estimated recoveries related to securitized loans in RMBS transactions that breached certain representations and warranties within losses and loss expenses (benefit). The losses and loss expense (benefit) incurred associated with changes in estimated representation and warranty recoveries for the year ended </span><span style="font-family:inherit;font-size:8pt;">December 31, 2019, 2018 and 2017</span><span style="font-family:inherit;font-size:8pt;"> was </span><span style="font-family:inherit;font-size:8pt;"><span>$42</span></span><span style="font-family:inherit;font-size:8pt;">, </span><span style="font-family:inherit;font-size:8pt;"><span>$62</span></span><span style="font-family:inherit;font-size:8pt;"> and </span><span style="font-family:inherit;font-size:8pt;"><span>$72</span></span><span style="font-family:inherit;font-size:8pt;">, respectively.</span></div></td></tr></table><div style="line-height:120%;font-size:8pt;padding-left:0px;"><span style="font-family:inherit;font-size:8pt;">(4)</span></div><div style="line-height:120%;text-align:justify;font-size:8pt;"><span style="font-family:inherit;font-size:8pt;">Represents reinsurance recoverable on future loss and loss expenses. Additionally, the Balance Sheet line "</span><span style="font-family:inherit;font-size:8pt;">Reinsurance recoverable on paid and unpaid losses</span><span style="font-family:inherit;font-size:8pt;">" includes reinsurance recoverables (payables) of </span><span style="font-family:inherit;font-size:8pt;">$0</span><span style="font-family:inherit;font-size:8pt;">, </span><span style="font-family:inherit;font-size:8pt;">$1</span><span style="font-family:inherit;font-size:8pt;"> and </span><span style="font-family:inherit;font-size:8pt;">$0</span><span style="font-family:inherit;font-size:8pt;"> as of </span><span style="font-family:inherit;font-size:8pt;">December 31, 2019, 2018 and 2017</span><span style="font-family:inherit;font-size:8pt;">, respectively, related to previously presented loss and loss expenses and subrogation.</span></div>

CY2018Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

-107000000

USD

CY2017Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

4114000000

USD

CY2016Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

3696000000

USD

CY2018Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

23000000

USD

CY2017Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

41000000

USD

CY2016Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

31000000

USD

CY2018Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

-130000000

USD

CY2017Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

4073000000

USD

CY2016Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

3665000000

USD

CY2019

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

1000000

USD

CY2018

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

5000000

USD

CY2017

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense

6000000

USD

CY2019

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

12000000

USD

CY2018

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

-228000000

USD

CY2017

us-gaap

Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense

SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense

507000000

USD

CY2019

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

13000000

USD

CY2018

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

-224000000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1

513000000

USD

CY2019

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

0

USD

CY2018

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

0

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1

1000000

USD

CY2019

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

318000000

USD

CY2018

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

3963000000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1

133000000

USD

CY2019

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

318000000

USD

CY2018

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

3964000000

USD

CY2017

us-gaap

Payments For Losses And Loss Adjustment Expense

PaymentsForLossesAndLossAdjustmentExpense

134000000

USD

CY2019

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-1000000

USD

CY2018

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

-15000000

USD

CY2017

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss

29000000

USD

CY2019Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

-436000000

USD

CY2018Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

-130000000

USD

CY2017Q4

us-gaap

Liability For Unpaid Claims And Claims Adjustment Expense Net

LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet

4073000000

USD

CY2019Q4

ambc

Impactof Vie Consolidationon Gross Lossand Loss Reserves

ImpactofVIEConsolidationonGrossLossandLossReserves

72000000

USD

CY2019Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

26000000

USD

CY2018Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

23000000

USD

CY2017Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

41000000

USD

CY2019Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

-482000000

USD

CY2018Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

-107000000

USD

CY2017Q4

us-gaap

Liability For Claims And Claims Adjustment Expense

LiabilityForClaimsAndClaimsAdjustmentExpense

4114000000

USD

CY2018Q1

ambc

Satisfactionanddischargeofsegregatedaccountdeferredamounts

3000000000

USD

CY2018Q1

ambc

Satisfactionanddischargeofsegregatedaccountdeferredinterestamounts

857000000

USD

CY2018Q1

ambc

Lossand Loss Expense Benefiton Settled Deferred Amounts

LossandLossExpenseBenefitonSettledDeferredAmounts

288000000

USD

CY2019

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

7000000

USD

CY2018

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

2000000

USD

CY2017

us-gaap

Reinsurance Effect On Claims And Benefits Incurred Amount Ceded

ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded

-20000000

USD

CY2019

ambc

Net Incurred Rmbs Subrogation Recoveries

NetIncurredRMBSSubrogationRecoveries

-42000000

USD

CY2018

ambc

Net Incurred Rmbs Subrogation Recoveries

NetIncurredRMBSSubrogationRecoveries

-62000000

USD

CY2017

ambc

Net Incurred Rmbs Subrogation Recoveries

NetIncurredRMBSSubrogationRecoveries

-72000000

USD

CY2019Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding

221

Policies

CY2019

us-gaap

Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period

InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod

P15Y

CY2019Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal

6168000000

USD

CY2019Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest

3029000000

USD

CY2019Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding

9197000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability

-2434000000

USD

CY2019Q4

ambc

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability

-541000000

USD

CY2019Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability

-1893000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation

1777000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation

49000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1727000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation

720000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation

53000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation

666000000

USD

CY2019Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability

501000000

USD

CY2019Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue

-54000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Loss Adjustment Expenses Reserve

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve

73000000

USD

CY2019Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-482000000

USD

CY2019Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable

26000000

USD

CY2019Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

26000000

USD

CY2018Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNumberOfContractsIssuedAndOutstanding

231

Policies

CY2018

us-gaap

Insured Financial Obligations With Credit Deterioration Remaining Weighted Average Contract Period

InsuredFinancialObligationsWithCreditDeteriorationRemainingWeightedAverageContractPeriod

P16Y

CY2018Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingPrincipal

9403000000

USD

CY2018Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstandingInterest

10583000000

USD

CY2018Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationInsuredContractualPaymentsOutstanding

19986000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Undiscounted Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossUndiscountedClaimLiability

-3448000000

USD

CY2018Q4

ambc

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationDiscountOnGrossClaimLiability

-1092000000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Gross Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationGrossClaimLiability

-2356000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedRmbsSubrogation

1810000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnRmbsSubrogation

39000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1771000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Undiscounted Claim Liability Gross Undiscounted Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossUndiscountedClaimLiabilityGrossUndiscountedOtherSubrogation

785000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Discount On Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityDiscountOnOtherSubrogation

133000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Other Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityOtherSubrogation

652000000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Net Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationNetClaimLiability

66000000

USD

CY2018Q4

us-gaap

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

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionUnearnedPremiumRevenue

-107000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Loss Adjustment Expenses Reserve

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationLossAdjustmentExpensesReserve

66000000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Claim Liability

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionClaimLiability

-107000000

USD

CY2018Q4

us-gaap

Schedule Of Insured Financial Obligations With Credit Deterioration Statement Of Financial Position Reinsurance Recoverable

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationStatementOfFinancialPositionReinsuranceRecoverable

23000000

USD

CY2018Q4

ambc

Loss Reserves Ceded To Reinsurers

LossReservesCededToReinsurers

23000000

USD

CY2019Q4

ambc

Public Finance Puerto Rico Net Par Outstanding

PublicFinancePuertoRicoNetParOutstanding

1123000000

USD

CY2019Q4

ambc

Possible Increasein Domestic Public Finance Loss Reserves

PossibleIncreaseinDomesticPublicFinanceLossReserves

1000000000

USD

CY2019Q4

us-gaap

Stockholders Equity Including Portion Attributable To Noncontrolling Interest

StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest

1536000000

USD

CY2019Q4

ambc

Stockholders Equity After Possible Increasein Domestic Public Finance Loss Reserves

StockholdersEquityAfterPossibleIncreaseinDomesticPublicFinanceLossReserves

536000000

USD

CY2019Q1

ambc

Percent Cash New Cofina Bonds Allocated Under Poa

PercentCashNewCOFINABondsAllocatedUnderPOA

0.93

CY2019Q4

ambc

Ambac Assurance Remaining Policy Obligations

AmbacAssuranceRemainingPolicyObligations

101000000

USD

CY2019Q4

ambc

Ambac Assurance Remaining Policy Obligations

AmbacAssuranceRemainingPolicyObligations

101000000

USD

CY2019Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1727000000

USD

CY2019Q4

ambc

Balance Of Rmbs Subrogation Recoveries Net Of Reinsurance

BalanceOfRmbsSubrogationRecoveriesNetOfReinsurance

-1702000000

USD

CY2018Q4

ambc

Schedule Of Insured Financial Obligations With Credit Deterioration Reductions Of Gross Claim Liability Rmbs Subrogation

ScheduleOfInsuredFinancialObligationsWithCreditDeteriorationReductionsOfGrossClaimLiabilityRmbsSubrogation

1771000000

USD

CY2018Q4

ambc

Balance Of Rmbs Subrogation Recoveries Net Of Reinsurance

BalanceOfRmbsSubrogationRecoveriesNetOfReinsurance

-1744000000

USD

CY2019Q4

ambc

Financial Guarantee Gross Outstanding Principal Assumed From Third Parties

FinancialGuaranteeGrossOutstandingPrincipalAssumedFromThirdParties

219000000

USD

CY2018Q4

ambc

Financial Guarantee Gross Outstanding Principal Assumed From Third Parties

FinancialGuaranteeGrossOutstandingPrincipalAssumedFromThirdParties

219000000

USD

CY2019Q4

ambc

Deferred Ceded Premiums And Reinsurance Recoverables

DeferredCededPremiumsAndReinsuranceRecoverables

109000000

USD

CY2019Q4

us-gaap

Reinsurance Payable

ReinsurancePayable

29000000

USD

CY2019Q4

us-gaap

Letters Of Credit Outstanding Amount

LettersOfCreditOutstandingAmount

124000000

USD

CY2019Q4

ambc

Financial Guarantee Outstanding Principal Ceded To Third Parties

FinancialGuaranteeOutstandingPrincipalCededToThirdParties

5890000000

USD

CY2019Q4

ambc

Amount Of Insured Par Outstanding Ceded To Reinsurer

AmountOfInsuredParOutstandingCededToReinsurer

2746000000

USD

CY2019

ambc

Ceded Principal Outstanding Major Reinsurer Percentage

CededPrincipalOutstandingMajorReinsurerPercentage

0.063

CY2019

ambc

Percentage Of Ceded Financial Guarantee Principal Outstanding

PercentageOfCededFinancialGuaranteePrincipalOutstanding

1

CY2019Q4

ambc

Unsecured Reinsurance Recoverables

UnsecuredReinsuranceRecoverables

41000000

USD

CY2019Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

1273000000

USD

CY2018Q4

us-gaap

Intangible Assets Gross Excluding Goodwill

IntangibleAssetsGrossExcludingGoodwill

1552000000

USD

CY2019Q4

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

847000000

USD

CY2018Q4

us-gaap

Finite Lived Intangible Assets Accumulated Amortization

FiniteLivedIntangibleAssetsAccumulatedAmortization

833000000

USD

CY2019Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

427000000

USD

CY2018Q4

us-gaap

Intangible Assets Net Excluding Goodwill

IntangibleAssetsNetExcludingGoodwill

719000000

USD

CY2019

us-gaap

Acquired Finite Lived Intangible Assets Weighted Average Useful Life

AcquiredFiniteLivedIntangibleAssetsWeightedAverageUsefulLife

P7Y7M6D

CY2019Q4

ambc

Average Annual Rate Of Return

AverageAnnualRateOfReturn

0.0543

CY2018Q4

ambc

Average Annual Rate Of Return

AverageAnnualRateOfReturn

0.0587

CY2019

ambc

Prescribed Discount Rate Percentage

PrescribedDiscountRatePercentage

0.0510

CY2019Q4

us-gaap

Statutory Accounting Practices Statutory Capital And Surplus Required

StatutoryAccountingPracticesStatutoryCapitalAndSurplusRequired

100000000

USD

CY2019Q4

ambc

Reductiontogrosspaidinandconntributedsurplus

REDUCTIONTOGROSSPAIDINANDCONNTRIBUTEDSURPLUS

3433000000

USD

CY2018Q4

ambc

Statutory Accounting Practices Statutory Capitaland Surplus Required Pursuantto Amps Exchange

StatutoryAccountingPracticesStatutoryCapitalandSurplusRequiredPursuanttoAMPSExchange

75000000

USD

CY2019

ambc

Quarterly Dividend Increase Limitation Percentage

QuarterlyDividendIncreaseLimitationPercentage

0.15

CY2019

ambc

Percentage Of Policy Holders Surplus

PercentageOfPolicyHoldersSurplus

0.10

CY2019Q4

us-gaap

Derivative Credit Risk Valuation Adjustment Derivative Liabilities

DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities

0

USD

CY2018Q4

us-gaap

Derivative Credit Risk Valuation Adjustment Derivative Liabilities

DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities

0

USD

CY2018Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

72000000

USD

CY2017Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

809000000

USD

CY2019

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

2000000

USD

CY2018

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

36000000

USD

CY2019

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Other Comprehensive Income

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome

0

USD

CY2018

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Other Comprehensive Income

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome

-53000000

USD

CY2019

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

0

USD

CY2018

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

0

USD

CY2019

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues

0

USD

CY2018

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues

0

USD

CY2019

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

0

USD

CY2018

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

0

USD

CY2019

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

-2000000

USD

CY2018

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

-714000000

USD

CY2018

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

0

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3

-5000000

USD

CY2019Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

72000000

USD

CY2018Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

72000000

USD

CY2019

us-gaap

Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss

FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

0

USD

CY2018

us-gaap

Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss

FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

0

USD

CY2016Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

763000000

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings

65000000

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Other Comprehensive Income

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome

6000000

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases

36000000

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Issues

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetIssues

0

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales

-79000000

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Settlements

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSettlements

-30000000

USD

CY2017

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3

48000000

USD

CY2017Q4

us-gaap

Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value

FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue

809000000

USD

CY2017

us-gaap

Fair Value Liabilities Measured On Recurring Basis Change In Unrealized Gain Loss

FairValueLiabilitiesMeasuredOnRecurringBasisChangeInUnrealizedGainLoss

0

USD

CY2019Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

3187000000

USD

CY2019Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

132000000

USD

CY2019Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

5000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Current

AvailableForSaleSecuritiesCurrent

3314000000

USD

CY2019Q4

us-gaap

Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

0

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

3451000000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax

133000000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

38000000

USD

CY2018Q4

us-gaap

Available For Sale Securities Current

AvailableForSaleSecuritiesCurrent

3546000000

USD

CY2018Q4

us-gaap

Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Net Of Tax Availableforsale Debt Securities

AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossNetOfTaxAvailableforsaleDebtSecurities

0

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost

749000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities Within One Year Fair Value

AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue

749000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost

1157000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities After One Through Five Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue

1173000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost

477000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue

501000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Amortized Cost

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost

145000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities After Ten Years Fair Value

AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue

160000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities Single Maturity Date Amortized Cost Basis

AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDateAmortizedCostBasis

2528000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Maturities Single Maturity Date

AvailableForSaleSecuritiesDebtMaturitiesSingleMaturityDate

2583000000

USD

CY2019Q4

us-gaap

Available For Sale Debt Securities Amortized Cost Basis

AvailableForSaleDebtSecuritiesAmortizedCostBasis

3187000000

USD

CY2019Q4

us-gaap

Available For Sale Securities Debt Securities

AvailableForSaleSecuritiesDebtSecurities

3314000000

USD

CY2019Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

401000000

USD

CY2019Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

4000000

USD

CY2019Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

88000000

USD

CY2019Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

1000000

USD

CY2019Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position

DebtSecuritiesAvailableForSaleUnrealizedLossPosition

489000000

USD

CY2019Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

5000000

USD

CY2018Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months

1139000000

USD

CY2018Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss

27000000

USD

CY2018Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger

360000000

USD

CY2018Q4

us-gaap

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

DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss

11000000

USD

CY2018Q4

us-gaap

Debt Securities Available For Sale Unrealized Loss Position

DebtSecuritiesAvailableForSaleUnrealizedLossPosition

1499000000

USD

CY2018Q4

us-gaap

Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax

AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax

38000000

USD

CY2019

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

64000000

USD

CY2018

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

111000000

USD

CY2017

us-gaap

Available For Sale Securities Gross Realized Gains

AvailableForSaleSecuritiesGrossRealizedGains

29000000

USD

CY2019

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

5000000

USD

CY2018

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

7000000

USD

CY2017

us-gaap

Available For Sale Securities Gross Realized Losses

AvailableForSaleSecuritiesGrossRealizedLosses

19000000

USD

CY2019

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

81000000

USD

CY2018

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

111000000

USD

CY2017

us-gaap

Availableforsale Securities Gross Realized Gain Loss Excluding Other Than Temporary Impairments

AvailableforsaleSecuritiesGrossRealizedGainLossExcludingOtherThanTemporaryImpairments

5000000

USD

CY2019

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

0

USD

CY2018

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

3000000

USD

CY2017

us-gaap

Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net

OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNet

20000000

USD

CY2018Q4

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

12000000

USD

CY2017Q4

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

67000000

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CY2016Q4

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

52000000

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CY2019

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

0

USD

CY2018

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

1000000

USD

CY2017

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment

3000000

USD

CY2018

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

0

USD

CY2017

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses

12000000

USD

CY2019

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

1000000

USD

CY2018

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

56000000

USD

CY2017

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSold

0

USD

CY2019Q4

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

12000000

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CY2018Q4

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

12000000

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CY2017Q4

us-gaap

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

OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld

67000000

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CY2019Q4

ambc

Fair Value Of Securities Deposited With Governmental Authorities

FairValueOfSecuritiesDepositedWithGovernmentalAuthorities

6000000

USD

CY2018Q4

ambc

Fair Value Of Securities Deposited With Governmental Authorities

FairValueOfSecuritiesDepositedWithGovernmentalAuthorities

6000000

USD

CY2019Q4

ambc

Market Valueof Secured Note Collateral

MarketValueofSecuredNoteCollateral

197000000

USD

CY2018Q4

ambc

Market Valueof Secured Note Collateral

MarketValueofSecuredNoteCollateral

210000000

USD

CY2018

us-gaap

Investment Income Interest And Dividend

InvestmentIncomeInterestAndDividend

265000000

USD

CY2017

us-gaap

Investment Income Interest And Dividend

InvestmentIncomeInterestAndDividend

337000000

USD

CY2019

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

6000000

USD

CY2018

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

7000000

USD

CY2017

us-gaap

Investment Income Investment Expense

InvestmentIncomeInvestmentExpense

8000000

USD

CY2019

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

196000000

USD

CY2018

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

271000000

USD

CY2017

us-gaap

Interest And Dividend Income Securities Available For Sale

InterestAndDividendIncomeSecuritiesAvailableForSale

338000000

USD

CY2019

us-gaap

Net Investment Income

NetInvestmentIncome

227000000

USD

CY2018

us-gaap

Net Investment Income

NetInvestmentIncome

273000000

USD

CY2017

us-gaap

Net Investment Income

NetInvestmentIncome

361000000

USD

CY2018

us-gaap

Net Realized Or Unrealized Gain Loss On Trading Securities

NetRealizedOrUnrealizedGainLossOnTradingSecurities

24000000

USD

CY2017

us-gaap

Net Realized Or Unrealized Gain Loss On Trading Securities

NetRealizedOrUnrealizedGainLossOnTradingSecurities

-3000000

USD

CY2016

us-gaap

Net Realized Or Unrealized Gain Loss On Trading Securities

NetRealizedOrUnrealizedGainLossOnTradingSecurities

18000000

USD

CY2018

us-gaap

Trading Securities Realized Gain Loss

TradingSecuritiesRealizedGainLoss

7000000

USD

CY2017

us-gaap

Trading Securities Realized Gain Loss

TradingSecuritiesRealizedGainLoss

1000000

USD

CY2016

us-gaap

Trading Securities Realized Gain Loss

TradingSecuritiesRealizedGainLoss

5000000

USD

CY2019Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

75000000

USD

CY2019Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

0

USD

CY2019Q4

us-gaap

Derivative Assets

DerivativeAssets

75000000

USD

CY2019Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

0

USD

CY2019Q4

ambc

Derivative Assets Net Amount

DerivativeAssetsNetAmount

75000000

USD

CY2019Q4

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

90000000

USD

CY2019Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

0

USD

CY2019Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

90000000

USD

CY2019Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountNotOffsetAgainstCollateral

89000000

USD

CY2019Q4

ambc

Derivative Liabilities Net Amount

DerivativeLiabilitiesNetAmount

1000000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset

DerivativeFairValueOfDerivativeAsset

60000000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral

0

USD

CY2018Q4

us-gaap

Derivative Assets

DerivativeAssets

59000000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Asset Amount Not Offset Against Collateral

DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral

0

USD

CY2018Q4

ambc

Derivative Assets Net Amount

DerivativeAssetsNetAmount

59000000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Liability

DerivativeFairValueOfDerivativeLiability

77000000

USD

CY2018Q4

us-gaap

Derivative Fair Value Of Derivative Liability Amount Offset Against Collateral

DerivativeFairValueOfDerivativeLiabilityAmountOffsetAgainstCollateral

0

USD

CY2018Q4

us-gaap

Derivative Liabilities

DerivativeLiabilities

77000000

USD

CY2018Q4

ambc

Derivative Liabilities Gross Amount Of Collateral Cash And Securities Pledged Not Offset

DerivativeLiabilitiesGrossAmountOfCollateralCashAndSecuritiesPledgedNotOffset

71000000

USD

CY2018Q4

ambc

Derivative Liabilities Net Amount

DerivativeLiabilitiesNetAmount

6000000

USD

CY2019Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

36000000

USD

CY2018Q4

us-gaap

Derivative Collateral Right To Reclaim Cash

DerivativeCollateralRightToReclaimCash

103000000

USD

CY2019

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

-50000000

USD

CY2018

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

7000000

USD

CY2017

us-gaap

Derivative Gain Loss On Derivative Net

DerivativeGainLossOnDerivativeNet

76000000

USD

CY2019

ambc

Derivative Gain Losson Derivatives Total Net

DerivativeGainLossonDerivativesTotalNet

-82000000

USD

CY2018

ambc

Derivative Gain Losson Derivatives Total Net

DerivativeGainLossonDerivativesTotalNet

512000000

USD

CY2017

ambc

Derivative Gain Losson Derivatives Total Net

DerivativeGainLossonDerivativesTotalNet

-76000000

USD

CY2018Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

89000000

USD

CY2017Q4

us-gaap

Derivative Net Liability Position Aggregate Fair Value

DerivativeNetLiabilityPositionAggregateFairValue

67000000

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CY2018Q4

us-gaap

Collateral Already Posted Aggregate Fair Value

CollateralAlreadyPostedAggregateFairValue

109000000

USD

CY2017Q4

us-gaap

Collateral Already Posted Aggregate Fair Value

CollateralAlreadyPostedAggregateFairValue

84000000

USD

CY2018Q4

ambc

Loans Unpaid Principal Balance

LoansUnpaidPrincipalBalance

19000000

USD

CY2017Q4

ambc

Loans Unpaid Principal Balance

LoansUnpaidPrincipalBalance

19000000

USD

CY2019Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Next Twelve Months

LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths

531000000

USD

CY2019Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Two

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo

0

USD

CY2019Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Three

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree

0

USD

CY2019Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Four

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour

1763000000

USD

CY2019Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal In Year Five

LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive

0

USD

CY2019Q4

us-gaap

Long Term Debt Maturities Repayments Of Principal After Year Five

LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive

687000000

USD

CY2018Q1

ambc

One Time Interest Paymenton Surplus Notes

OneTimeInterestPaymentonSurplusNotes

14000000

USD

CY2013Q2

ambc

Ambc Junior Surplus Notes Issued

Ambc_JuniorSurplusNotesIssued

350000000

USD

CY2018Q1

ambc

Tier2 Note Securityin Rmbs Litigation Settlement Proceeds

Tier2NoteSecurityinRMBSLitigationSettlementProceeds

1600000000

USD

CY2019

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

-174000000

USD

CY2018

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

264000000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Domestic

IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic

-451000000

USD

CY2019

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

-9000000

USD

CY2018

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

8000000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Foreign

IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign

167000000

USD

CY2019

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-183000000

USD

CY2018

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

273000000

USD

CY2017

us-gaap

Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments

IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments

-284000000

USD

CY2019

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

0

USD

CY2018

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

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USD

CY2017

us-gaap

Current Federal Tax Expense Benefit

CurrentFederalTaxExpenseBenefit

-30000000

USD

CY2019

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

-3000000

USD

CY2018

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

2000000

USD

CY2017

us-gaap

Current State And Local Tax Expense Benefit

CurrentStateAndLocalTaxExpenseBenefit

2000000

USD

CY2019

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

37000000

USD

CY2018

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

-1000000

USD

CY2017

us-gaap

Current Foreign Tax Expense Benefit

CurrentForeignTaxExpenseBenefit

41000000

USD

CY2019

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

34000000

USD

CY2018

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

0

USD

CY2017

us-gaap

Current Income Tax Expense Benefit

CurrentIncomeTaxExpenseBenefit

13000000

USD

CY2019

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

-1000000

USD

CY2018

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

5000000

USD

CY2017

us-gaap

Deferred Foreign Income Tax Expense Benefit

DeferredForeignIncomeTaxExpenseBenefit

31000000

USD

CY2019

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

-1000000

USD

CY2018

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

5000000

USD

CY2017

us-gaap

Deferred Income Tax Expense Benefit

DeferredIncomeTaxExpenseBenefit

31000000

USD

CY2019

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

32000000

USD

CY2018

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

5000000

USD

CY2017

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

44000000

USD

CY2019

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

32000000

USD

CY2018

us-gaap

Income Tax Effects Allocated Directly To Equity

IncomeTaxEffectsAllocatedDirectlyToEquity

3000000

USD

CY2018

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

5000000

USD

CY2017

us-gaap

Income Tax Expense Benefit

IncomeTaxExpenseBenefit

44000000

USD

CY2019

ambc

Net Unrealized Losses On Securities Tax Effect

NetUnrealizedLossesOnSecuritiesTaxEffect

14000000

USD

CY2018

ambc

Net Unrealized Losses On Securities Tax Effect

NetUnrealizedLossesOnSecuritiesTaxEffect

12000000

USD

CY2017

ambc

Net Unrealized Losses On Securities Tax Effect

NetUnrealizedLossesOnSecuritiesTaxEffect

-31000000

USD

CY2019

ambc

Unrealized Losson Fx Tax Effect

UnrealizedLossonFXTaxEffect

0

USD

CY2018

ambc

Unrealized Losson Fx Tax Effect

UnrealizedLossonFXTaxEffect

0

USD

CY2017

ambc

Unrealized Losson Fx Tax Effect

UnrealizedLossonFXTaxEffect

26000000

USD

CY2019

ambc

Valuation Allowances And Reserves Charged To Equity

ValuationAllowancesAndReservesChargedToEquity

23000000

USD

CY2018

ambc

Valuation Allowances And Reserves Charged To Equity

ValuationAllowancesAndReservesChargedToEquity

9000000

USD

CY2017

ambc

Valuation Allowances And Reserves Charged To Equity

ValuationAllowancesAndReservesChargedToEquity

5000000

USD

CY2019

us-gaap

Income Tax Effects Allocated Directly To Equity

IncomeTaxEffectsAllocatedDirectlyToEquity

-8000000

USD

CY2017

us-gaap

Income Tax Effects Allocated Directly To Equity

IncomeTaxEffectsAllocatedDirectlyToEquity

0

USD

CY2019

us-gaap

Income Tax Effects Allocated Directly To Equity Other

IncomeTaxEffectsAllocatedDirectlyToEquityOther

24000000

USD

CY2018

us-gaap

Income Tax Effects Allocated Directly To Equity Other

IncomeTaxEffectsAllocatedDirectlyToEquityOther

8000000

USD

CY2017

us-gaap

Income Tax Effects Allocated Directly To Equity Other

IncomeTaxEffectsAllocatedDirectlyToEquityOther

44000000

USD

CY2019

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

-38000000

USD

CY2019

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.210

CY2018

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

57000000

USD

CY2018

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.210

CY2017

us-gaap

Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate

IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate

-99000000

USD

CY2017

us-gaap

Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate

EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate

0.350

CY2019

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

3000000

USD

CY2019

us-gaap

Effective Income Tax Rate Reconciliation Tax Exempt Income

EffectiveIncomeTaxRateReconciliationTaxExemptIncome

-0.018

CY2018

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

7000000

USD

CY2018

us-gaap

Effective Income Tax Rate Reconciliation Tax Exempt Income

EffectiveIncomeTaxRateReconciliationTaxExemptIncome

0.025

CY2017

us-gaap

Income Tax Reconciliation Tax Exempt Income

IncomeTaxReconciliationTaxExemptIncome

6000000

USD

CY2017

us-gaap

Effective Income Tax Rate Reconciliation Tax Exempt Income

EffectiveIncomeTaxRateReconciliationTaxExemptIncome

-0.021

CY2019

us-gaap

Income Tax Reconciliation Tax Contingencies Foreign

IncomeTaxReconciliationTaxContingenciesForeign

40000000

USD

CY2019

us-gaap

Effective Income Tax Rate Reconciliation Tax Contingencies Foreign

EffectiveIncomeTaxRateReconciliationTaxContingenciesForeign

-0.221

CY2018

us-gaap

Income Tax Reconciliation Tax Contingencies Foreign

IncomeTaxReconciliationTaxContingenciesForeign

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Effectiveincome Tax Reconciliation Tax Bankruptcy Adjustments

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CY2016Q4

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CY2019Q4

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CY2018Q4

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CY2019Q4

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Unrecognized Tax Benefits Interest On Income Taxes Paid

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Unrecognized Tax Benefits Interest On Income Taxes Paid

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CY2019Q4

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Deferred Tax Liabilities Goodwill And Intangible Assets Intangible Assets

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CY2018Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Loss Reserves

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CY2019Q4

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CY2018Q4

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Deferred Tax Assets Valuation Allowance

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CY2019Q4

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CY2018Q4

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CY2019Q4

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CY2019

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CY2019

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CY2019

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CY2019Q4

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CY2019Q4

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CY2019

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Postemployment Benefits Period Expense

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019

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CY2018

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us-gaap

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us-gaap

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us-gaap

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us-gaap

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us-gaap

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us-gaap

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us-gaap

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us-gaap

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CY2019

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CY2019Q4

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CY2019Q4

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us-gaap

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q4

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CY2019Q1

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CY2019Q2

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CY2018Q1

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CY2018Q2

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CY2018Q3

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us-gaap

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us-gaap

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us-gaap

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us-gaap

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CY2019Q3

us-gaap

Profit Loss

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CY2019Q4

us-gaap

Profit Loss

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CY2018Q1

us-gaap

Profit Loss

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CY2018Q2

us-gaap

Profit Loss

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CY2018Q3

us-gaap

Profit Loss

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CY2018Q4

us-gaap

Profit Loss

ProfitLoss

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CY2019Q1

us-gaap

Net Income Loss

NetIncomeLoss

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CY2018Q2

us-gaap

Net Income Loss

NetIncomeLoss

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CY2018Q3

us-gaap

Net Income Loss

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CY2018Q4

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Net Income Loss

NetIncomeLoss

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CY2019Q1

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

-0.94

CY2019Q2

us-gaap

Earnings Per Share Basic

EarningsPerShareBasic

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CY2019Q3

us-gaap

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us-gaap

Earnings Per Share Basic

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EarningsPerShareDiluted

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us-gaap

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EarningsPerShareDiluted

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us-gaap

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us-gaap

Earnings Per Share Diluted

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us-gaap

Earnings Per Share Diluted

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CY2018Q3

us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

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us-gaap

Earnings Per Share Diluted

EarningsPerShareDiluted

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CY2019Q4

us-gaap

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OtherInvestmentsAndSecuritiesAtCost

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CY2019Q4

us-gaap

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CY2019Q4

us-gaap

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CY2011Q3

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CY2019

us-gaap

Premiums Written Net

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CY2019Q4

us-gaap

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CY2019Q4

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CY2019Q4

ambc

Tolling Payment Receivablefrom Aac

TollingPaymentReceivablefromAAC

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CY2018Q4

ambc

Tolling Payment Receivablefrom Aac

TollingPaymentReceivablefromAAC

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CY2018Q3

ambc

Amps Exchange Dollar Value Warrants Issued

AMPSExchangeDollarValueWarrantsIssued

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dei

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CY2011Q3

us-gaap

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CY2011Q3

us-gaap

Operating Loss Carryforwards

OperatingLossCarryforwards

3650000000

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ambc

Aac Net Taxable Income

AACNetTaxableIncome

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CY2019

ambc

Operating Loss Generatedin Current Year

OperatingLossGeneratedinCurrentYear

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CY2019Q4

ambc

Tolling Payment Payableto Afg

TollingPaymentPayabletoAFG

147000000

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CY2019Q4

ambc

Tolling Paymentto Afg

TollingPaymenttoAFG

119000000

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CY2019Q4

ambc

Tolling Payment Payableto Afg Outstanding Amount

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28000000

USD

CY2019

us-gaap

Direct Premiums Written

DirectPremiumsWritten

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CY2019

us-gaap

Ceded Premiums Written

CededPremiumsWritten

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CY2019

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2018

ambc

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Ambc_PremiumsWrittenFinancialGuaranteeInsuranceContractsPercentageOfAmountAssumedToNet

0

Rate

CY2018

us-gaap

Direct Premiums Written

DirectPremiumsWritten

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CY2018

us-gaap

Ceded Premiums Written

CededPremiumsWritten

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CY2018

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

USD

CY2018

us-gaap

Premiums Written Net

PremiumsWrittenNet

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CY2017

ambc

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

Ambc_PremiumsWrittenFinancialGuaranteeInsuranceContractsPercentageOfAmountAssumedToNet

0

Rate

CY2017

us-gaap

Direct Premiums Written

DirectPremiumsWritten

-14000000

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CY2017

us-gaap

Ceded Premiums Written

CededPremiumsWritten

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CY2017

us-gaap

Assumed Premiums Written

AssumedPremiumsWritten

0

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CY2017

us-gaap

Premiums Written Net

PremiumsWrittenNet

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CY2017

ambc

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

Ambc_PremiumsWrittenFinancialGuaranteeInsuranceContractsPercentageOfAmountAssumedToNet

0

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$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc

2018 Q4 Form 10-K Financial Statement

#000087450120000034 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC AMBAC FINANCIAL GROUP INC Stock $ambc

2018 Q4 Form 10-K Financial Statement

#000087450120000034 Filed on March 02, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AMBC
AMBAC FINANCIAL GROUP INC Stock $ambc