$AGO
ASSURED GUARANTY LTD Stock $ago

$ago Overview Financials Valuation SEC Filings Company Website

2020 Q1 Form 10-Q Financial Statement

#000127381320000017 Filed on May 08, 2020

Income Statement

Concept	2020 Q1	2019 Q1
Revenue	$96.00M	$195.0M
YoY Change	-50.77%	-33.45%
Cost Of Revenue	$20.00M	$46.00M
YoY Change	-56.52%	-355.56%
Gross Profit	$76.00M	$149.0M
YoY Change	-48.99%	-52.09%
Gross Profit Margin	79.17%	76.41%
Selling, General & Admin	$64.00M
YoY Change
% of Gross Profit	84.21%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$3.000M	$6.000M
YoY Change	-50.0%	20.0%
% of Gross Profit	3.95%	4.03%
Operating Expenses	$109.0M	$116.0M
YoY Change	-6.03%	123.08%
Operating Profit	-$33.00M	$33.00M
YoY Change	-200.0%	-87.26%
Interest Expense	$22.00M	$23.00M
YoY Change	-4.35%	-4.17%
% of Operating Profit		69.7%
Other Income/Expense, Net
YoY Change
Pretax Income	-$62.00M	$58.00M
YoY Change	-206.9%	-73.27%
Income Tax	-$4.000M	$4.000M
% Of Pretax Income		6.9%
Net Earnings	-$55.00M	$54.00M
YoY Change	-201.85%	-72.59%
Net Earnings / Revenue	-57.29%	27.69%
Basic Earnings Per Share	-$0.59	$0.52
Diluted Earnings Per Share	-$0.59	$0.52
COMMON SHARES
Basic Shares Outstanding	92.60M shares	103.0M shares
Diluted Shares Outstanding	92.60M shares	104.0M shares

Balance Sheet

Concept	2020 Q1	2019 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$221.0M	$123.0M
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
YoY Change
Long-Term Investments	$10.27B	$10.78B
YoY Change	-4.73%	-3.35%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$13.75B	$13.55B
YoY Change	1.43%	-3.34%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses		$93.00M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities		$93.00M
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$1.221B	$1.232B
YoY Change	-0.89%	-3.83%
Other Long-Term Liabilities	$1.495B	$1.088B
YoY Change	37.41%	-13.65%
Total Long-Term Liabilities	$2.716B	$2.320B
YoY Change	17.07%	-8.7%
TOTAL LIABILITIES
Total Short-Term Liabilities		$93.00M
Total Long-Term Liabilities	$2.716B	$2.320B
Total Liabilities	$7.472B	$6.882B
YoY Change	8.57%	-4.88%
SHAREHOLDERS EQUITY
Retained Earnings	$6.100B	$6.406B
YoY Change	-4.78%	4.98%
Common Stock	$1.000M	$1.000M
YoY Change	0.0%	-99.79%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$6.240B	$6.669B
YoY Change
Total Liabilities & Shareholders Equity	$13.75B	$13.55B
YoY Change	1.43%	-3.34%

Cashflow Statement

Concept	2020 Q1	2019 Q1
OPERATING ACTIVITIES
Net Income	-$55.00M	$54.00M
YoY Change	-201.85%	-72.59%
Depreciation, Depletion And Amortization	$3.000M	$6.000M
YoY Change	-50.0%	20.0%
Cash From Operating Activities	-$164.0M	-$332.0M
YoY Change	-50.6%	-1329.63%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	-$1.000M	$0.00
YoY Change		-100.0%
Cash From Investing Activities	$389.0M	$492.0M
YoY Change	-20.93%	290.48%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net	$116.0M	$80.00M
YoY Change	45.0%	-20.0%
Debt Paid & Issued, Net	$21.00M	$3.000M
YoY Change	600.0%	-84.21%
Cash From Financing Activities	-$180.0M	-$142.0M
YoY Change	26.76%	-21.55%
NET CHANGE
Cash From Operating Activities	-$164.0M	-$332.0M
Cash From Investing Activities	$389.0M	$492.0M
Cash From Financing Activities	-$180.0M	-$142.0M
Net Change In Cash	$38.00M	$19.00M
YoY Change	100.0%	-167.86%
FREE CASH FLOW
Cash From Operating Activities	-$164.0M	-$332.0M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2019Q4	ago	Assetsof Consolidated Investment Vehicles Fair Value Disclosure AssetsofConsolidatedInvestmentVehiclesFairValueDisclosure	558000000	USD
CY2020Q1	ago	Assetsof Consolidated Investment Vehicles Fair Value Disclosure AssetsofConsolidatedInvestmentVehiclesFairValueDisclosure	557000000	USD
CY2019Q4	ago	Insured Financial Obligations Loss Mitigation Securities InsuredFinancialObligationsLossMitigationSecurities	1400000000	USD
CY2019Q4	ago	Liabilitiesof Consolidated Investment Vehicles Fair Value Disclosure LiabilitiesofConsolidatedInvestmentVehiclesFairValueDisclosure	481000000	USD
CY2020Q1	ago	Liabilitiesof Consolidated Investment Vehicles Fair Value Disclosure LiabilitiesofConsolidatedInvestmentVehiclesFairValueDisclosure	426000000	USD
CY2019Q1	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax	0	USD
CY2020Q1	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax	13000000	USD
CY2019Q1	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax	25000000	USD
CY2020Q1	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax	-27000000	USD
CY2019Q1	ago	Other Comprehensive Income Loss Other Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherTaxPortionAttributableToParent	0	USD
CY2020Q1	ago	Other Comprehensive Income Loss Other Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherTaxPortionAttributableToParent	0	USD
CY2019Q4	ago	Other Investments Fair Value Disclosure OtherInvestmentsFairValueDisclosure	6000000	USD
CY2020Q1	ago	Other Investments Fair Value Disclosure OtherInvestmentsFairValueDisclosure	12000000	USD
CY2020Q1	ago	Percentage Of Cds Contracts Fair Valued Using Minimum Premium PercentageOfCdsContractsFairValuedUsingMinimumPremium	0
CY2020Q1	dei	Amendment Flag AmendmentFlag	false
CY2020Q1	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020Q1	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q1
CY2020Q1	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020Q1	dei	Entity Central Index Key EntityCentralIndexKey	0001273813
CY2019Q4	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	71000000	USD
CY2020Q1	us-gaap	Aoci Tax Attributable To Parent AociTaxAttributableToParent	34000000	USD
CY2019Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.18
CY2020Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.2
CY2019Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2020Q1	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2019Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2020Q1	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	500000000	shares
CY2019Q4	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	135000000	USD
CY2019Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	93274987	shares
CY2020Q1	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	89983322	shares
CY2019Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	93274987	shares
CY2020Q1	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	89983322	shares
CY2020Q1	us-gaap	Other Assets Fair Value Disclosure OtherAssetsFairValueDisclosure	177000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	2000000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	17000000	USD
CY2020Q1	dei	Document Type DocumentType	10-Q
CY2020Q1	dei	Document Quarterly Report DocumentQuarterlyReport	true
CY2020Q1	dei	Document Period End Date DocumentPeriodEndDate	2020-03-31
CY2020Q1	dei	Document Transition Report DocumentTransitionReport	false
CY2020Q1	dei	Entity File Number EntityFileNumber	001-32141
CY2020Q1	dei	Entity Registrant Name EntityRegistrantName	ASSURED GUARANTY LTD
CY2020Q1	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	D0
CY2020Q1	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0429991
CY2020Q1	dei	Entity Address Address Line1 EntityAddressAddressLine1	30 Woodbourne Avenue
CY2020Q1	dei	Entity Address City Or Town EntityAddressCityOrTown	Hamilton
CY2020Q1	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	HM 08
CY2020Q1	dei	Entity Address Country EntityAddressCountry	BM
CY2020Q1	dei	City Area Code CityAreaCode	441
CY2020Q1	dei	Local Phone Number LocalPhoneNumber	279-5700
CY2020Q1	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020Q1	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
CY2020Q1	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2020Q1	dei	Entity Small Business EntitySmallBusiness	false
CY2020Q1	dei	Entity Emerging Growth Company EntityEmergingGrowthCompany	false
CY2020Q1	dei	Entity Shell Company EntityShellCompany	false
CY2020Q2	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	86916590	shares
CY2020Q1	us-gaap	Trading Securities Debt TradingSecuritiesDebt	8568000000	USD
CY2019Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	8854000000	USD
CY2020Q1	us-gaap	Short Term Investments ShortTermInvestments	933000000	USD
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	1268000000	USD
CY2020Q1	us-gaap	Other Investments OtherInvestments	121000000	USD
CY2019Q4	us-gaap	Other Investments OtherInvestments	118000000	USD
CY2020Q1	us-gaap	Investments Investments	9622000000	USD
CY2019Q4	us-gaap	Investments Investments	10240000000	USD
CY2020Q1	us-gaap	Cash Cash	139000000	USD
CY2019Q4	us-gaap	Cash Cash	169000000	USD
CY2020Q1	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1233000000	USD
CY2019Q4	us-gaap	Premiums Receivable At Carrying Value PremiumsReceivableAtCarryingValue	1286000000	USD
CY2019Q4	ago	Assetsof Consolidated Investment Vehicles AssetsofConsolidatedInvestmentVehicles	572000000	USD
CY2019Q4	ago	Financial Guaranty Of Variable Interest Entities Assets Held FinancialGuarantyOfVariableInterestEntitiesAssetsHeld	442000000	USD
CY2020Q1	ago	Assetsof Consolidated Investment Vehicles AssetsofConsolidatedInvestmentVehicles	645000000	USD
CY2020Q1	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	113000000	USD
CY2019Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	111000000	USD
CY2020Q1	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	820000000	USD
CY2019Q4	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	747000000	USD
CY2020Q1	ago	Financial Guaranty Of Variable Interest Entities Assets Held FinancialGuarantyOfVariableInterestEntitiesAssetsHeld	368000000	USD
CY2020Q1	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	212000000	USD
CY2019Q4	us-gaap	Intangible Assets Net Including Goodwill IntangibleAssetsNetIncludingGoodwill	216000000	USD
CY2020Q1	us-gaap	Other Assets OtherAssets	593000000	USD
CY2019Q4	us-gaap	Other Assets OtherAssets	543000000	USD
CY2020Q1	us-gaap	Assets Assets	13745000000	USD
CY2019Q4	us-gaap	Assets Assets	14326000000	USD
CY2020Q1	us-gaap	Unearned Premiums UnearnedPremiums	3706000000	USD
CY2019Q4	us-gaap	Unearned Premiums UnearnedPremiums	3736000000	USD
CY2020Q1	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1050000000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1050000000	USD
CY2020Q1	us-gaap	Long Term Debt LongTermDebt	1221000000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1235000000	USD
CY2020Q1	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	265000000	USD
CY2019Q4	us-gaap	Credit Risk Derivative Liabilities At Fair Value CreditRiskDerivativeLiabilitiesAtFairValue	191000000	USD
CY2020Q1	ago	Variable Interest Entity Consolidated Carrying Amount Liabilities With Recourse VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithRecourse	312000000	USD
CY2019Q4	ago	Variable Interest Entity Consolidated Carrying Amount Liabilities With Recourse VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithRecourse	367000000	USD
CY2020Q1	ago	Variable Interest Entity Consolidated Carrying Amount Liabilities Without Recourse VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithoutRecourse	82000000	USD
CY2019Q4	ago	Variable Interest Entity Consolidated Carrying Amount Liabilities Without Recourse VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithoutRecourse	102000000	USD
CY2020Q1	ago	Liabilitiesof Consolidated Investments Vehicles LiabilitiesofConsolidatedInvestmentsVehicles	431000000	USD
CY2019Q4	ago	Liabilitiesof Consolidated Investments Vehicles LiabilitiesofConsolidatedInvestmentsVehicles	482000000	USD
CY2020Q1	us-gaap	Other Liabilities OtherLiabilities	405000000	USD
CY2019Q4	us-gaap	Other Liabilities OtherLiabilities	511000000	USD
CY2020Q1	us-gaap	Liabilities Liabilities	7472000000	USD
CY2019Q4	us-gaap	Liabilities Liabilities	7674000000	USD
CY2020Q1	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2019Q4	us-gaap	Commitments And Contingencies CommitmentsAndContingencies		USD
CY2020Q1	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	8000000	USD
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Carrying Amount RedeemableNoncontrollingInterestEquityOtherCarryingAmount	7000000	USD
CY2020Q1	us-gaap	Common Stock Value CommonStockValue	1000000	USD
CY2019Q4	us-gaap	Common Stock Value CommonStockValue	1000000	USD
CY2020Q1	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	6100000000	USD
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CY2020Q1	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	138000000	USD
CY2019Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	342000000	USD
CY2020Q1	us-gaap	Compensation And Benefits Trust CompensationAndBenefitsTrust	1000000	USD
CY2019Q4	us-gaap	Compensation And Benefits Trust CompensationAndBenefitsTrust	1000000	USD
CY2020Q1	us-gaap	Stockholders Equity StockholdersEquity	6240000000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	6639000000	USD
CY2020Q1	us-gaap	Minority Interest MinorityInterest	25000000	USD
CY2019Q4	us-gaap	Minority Interest MinorityInterest	6000000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6265000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6645000000	USD
CY2020Q1	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	13745000000	USD
CY2019Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	14326000000	USD
CY2020Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	103000000	USD
CY2019Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	118000000	USD
CY2020Q1	us-gaap	Net Investment Income NetInvestmentIncome	80000000	USD
CY2019Q1	us-gaap	Net Investment Income NetInvestmentIncome	98000000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	23000000	USD
CY2019Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	0	USD
CY2020Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-5000000	USD
CY2019Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-12000000	USD
CY2020Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-77000000	USD
CY2019Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-22000000	USD
CY2020Q1	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	48000000	USD
CY2019Q1	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	-9000000	USD
CY2020Q1	ago	Variable Interest Entity Changein Fair Value VariableInterestEntityChangeinFairValue	-9000000	USD
CY2019Q1	ago	Variable Interest Entity Changein Fair Value VariableInterestEntityChangeinFairValue	5000000	USD
CY2020Q1	ago	Fair Value Gain Loss On Consolidated Investment Vehicles FairValueGainLossOnConsolidatedInvestmentVehicles	-12000000	USD
CY2019Q1	ago	Fair Value Gain Loss On Consolidated Investment Vehicles FairValueGainLossOnConsolidatedInvestmentVehicles	0	USD
CY2020Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-62000000	USD
CY2019Q1	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	11000000	USD
CY2020Q1	us-gaap	Other Income OtherIncome	7000000	USD
CY2019Q1	us-gaap	Other Income OtherIncome	6000000	USD
CY2020Q1	us-gaap	Revenues Revenues	96000000	USD
CY2019Q1	us-gaap	Revenues Revenues	195000000	USD
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CY2019Q1	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	46000000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	22000000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	23000000	USD
CY2020Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	3000000	USD
CY2019Q1	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	6000000	USD
CY2020Q1	us-gaap	Employee Benefits And Share Based Compensation EmployeeBenefitsAndShareBasedCompensation	64000000	USD
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CY2019Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	23000000	USD
CY2020Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	154000000	USD
CY2019Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	139000000	USD
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CY2019Q1	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	2000000	USD
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-62000000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	58000000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4000000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4000000	USD
CY2020Q1	us-gaap	Profit Loss ProfitLoss	-58000000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	54000000	USD
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CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-55000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	54000000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.59
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CY2020Q1	us-gaap	Profit Loss ProfitLoss	-58000000	USD
CY2019Q1	us-gaap	Profit Loss ProfitLoss	54000000	USD
CY2020Q1	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax	-162000000	USD
CY2019Q1	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax	163000000	USD
CY2020Q1	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax	-52000000	USD
CY2019Q1	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax	5000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-214000000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	168000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	10000000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	0	USD
CY2020Q1	ago	Other Comprehensive Income Loss Other Netof Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent	0	USD
CY2019Q1	ago	Other Comprehensive Income Loss Other Netof Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent	0	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-204000000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	168000000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-262000000	USD
CY2019Q1	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	222000000	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-3000000	USD
CY2019Q1	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	0	USD
CY2020Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-259000000	USD
CY2019Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	222000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6645000000	USD
CY2020Q1	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	-56000000	USD
CY2020Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	19000000	USD
CY2020Q1	ago	Stock Issued During Period Value Sharebased Compensationand Other StockIssuedDuringPeriodValueSharebasedCompensationandOther	-5000000	USD
CY2020Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	116000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-204000000	USD
CY2020Q1	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	20000000	USD
CY2020Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6265000000	USD
CY2018Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6555000000	USD
CY2019Q1	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	54000000	USD
CY2019Q1	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	19000000	USD
CY2019Q1	ago	Stock Issued During Period Value Sharebased Compensationand Other StockIssuedDuringPeriodValueSharebasedCompensationandOther	-10000000	USD
CY2019Q1	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	79000000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	168000000	USD
CY2019Q1	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6669000000	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-164000000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-332000000	USD
CY2020Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	278000000	USD
CY2019Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	196000000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	86000000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	471000000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	217000000	USD
CY2019Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	177000000	USD
CY2020Q1	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	56000000	USD
CY2019Q1	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	107000000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	4000000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	2000000	USD
CY2020Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	12000000	USD
CY2019Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	67000000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-375000000	USD
CY2019Q1	us-gaap	Payments For Proceeds From Short Term Investments PaymentsForProceedsFromShortTermInvestments	-25000000	USD
CY2020Q1	ago	Proceedsfrom Paydownson Financial Guaranty Variable Interest Entities Assets ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets	37000000	USD
CY2019Q1	ago	Proceedsfrom Paydownson Financial Guaranty Variable Interest Entities Assets ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets	26000000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	1000000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	27000000	USD
CY2020Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	9000000	USD
CY2019Q1	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	0	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	389000000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	492000000	USD
CY2020Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20000000	USD
CY2019Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	20000000	USD
CY2020Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	116000000	USD
CY2019Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	80000000	USD
CY2020Q1	ago	Paydown Of Financial Guaranty Variable Interest Entities Liabilities PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities	35000000	USD
CY2019Q1	ago	Paydown Of Financial Guaranty Variable Interest Entities Liabilities PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities	25000000	USD
CY2020Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	21000000	USD
CY2019Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	3000000	USD
CY2020Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-11000000	USD
CY2019Q1	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-14000000	USD
CY2020Q1	ago	Contributions From Noncontrolling Interests To Investment Vehicles ContributionsFromNoncontrollingInterestsToInvestmentVehicles	23000000	USD
CY2019Q1	ago	Contributions From Noncontrolling Interests To Investment Vehicles ContributionsFromNoncontrollingInterestsToInvestmentVehicles	0	USD
CY2020Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-180000000	USD
CY2019Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-142000000	USD
CY2020Q1	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-7000000	USD
CY2019Q1	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	1000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	38000000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	19000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	183000000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	104000000	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	221000000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	123000000	USD
CY2020Q1	us-gaap	Interest Paid Net InterestPaidNet	9000000	USD
CY2019Q1	us-gaap	Interest Paid Net InterestPaidNet	9000000	USD
CY2020Q1	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	0	USD
CY2019Q1	us-gaap	Noncash Or Part Noncash Acquisition Investments Acquired1 NoncashOrPartNoncashAcquisitionInvestmentsAcquired1	139000000	USD
CY2020Q1	us-gaap	Cash Cash	139000000	USD
CY2019Q1	us-gaap	Cash Cash	123000000	USD
CY2020Q1	ago	Cashof Consolidated Investment Vehicles CashofConsolidatedInvestmentVehicles	82000000	USD
CY2019Q1	ago	Cashof Consolidated Investment Vehicles CashofConsolidatedInvestmentVehicles	0	USD
CY2020Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	221000000	USD
CY2019Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	123000000	USD
CY2020Q1	ago	Holding Companieswith Outstanding Public Debt Number HoldingCompanieswithOutstandingPublicDebtNumber	2	Company
	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2020Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2020Q1	ago	Revenue Including Adjustments RevenueIncludingAdjustments	190000000	USD
CY2020Q1	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	190000000	USD
CY2020Q1	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	146000000	USD
CY2020Q1	ago	Income Lossfrom Continuing Operationsbefore Equity Method Investments Income Taxes Noncontrolling Interest Segment Total IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsIncomeTaxesNoncontrollingInterestSegmentTotal	44000000	USD
CY2020Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	-4000000	USD
CY2020Q1	ago	Adjusted Income Lossfrom Continuing Operationsbefore Income Taxes Noncontrolling Interest Segment Total AdjustedIncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestSegmentTotal	40000000	USD
CY2020Q1	ago	Segment Income Tax Expense Benefit SegmentIncomeTaxExpenseBenefit	10000000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-3000000	USD
CY2020Q1	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	33000000	USD
CY2020Q1	us-gaap	Net Investment Income NetInvestmentIncome	80000000	USD
CY2020Q1	us-gaap	Interest Expense InterestExpense	22000000	USD
CY2020Q1	ago	Noncash Compensationand Operating Expenses Segment NoncashCompensationandOperatingExpensesSegment	15000000	USD
CY2019Q1	ago	Revenue Including Adjustments RevenueIncludingAdjustments	234000000	USD
CY2019Q1	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	234000000	USD
CY2019Q1	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	138000000	USD
CY2019Q1	ago	Income Lossfrom Continuing Operationsbefore Equity Method Investments Income Taxes Noncontrolling Interest Segment Total IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsIncomeTaxesNoncontrollingInterestSegmentTotal	96000000	USD
CY2019Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2000000	USD
CY2019Q1	ago	Adjusted Income Lossfrom Continuing Operationsbefore Income Taxes Noncontrolling Interest Segment Total AdjustedIncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestSegmentTotal	98000000	USD
CY2019Q1	ago	Segment Income Tax Expense Benefit SegmentIncomeTaxExpenseBenefit	12000000	USD
CY2019Q1	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	0	USD
CY2019Q1	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	86000000	USD
CY2019Q1	us-gaap	Net Investment Income NetInvestmentIncome	98000000	USD
CY2019Q1	us-gaap	Interest Expense InterestExpense	23000000	USD
CY2019Q1	ago	Noncash Compensationand Operating Expenses Segment NoncashCompensationandOperatingExpensesSegment	12000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-55000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	54000000	USD
CY2020Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-5000000	USD
CY2019Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-12000000	USD
CY2020Q1	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-88000000	USD
CY2019Q1	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-28000000	USD
CY2020Q1	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	48000000	USD
CY2019Q1	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	-9000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation Segment Total FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslationSegmentTotal	-57000000	USD
CY2019Q1	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation Segment Total FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslationSegmentTotal	9000000	USD
CY2020Q1	ago	Adjustmentsto Operating Income Pre Tax AdjustmentstoOperatingIncomePreTax	-102000000	USD
CY2019Q1	ago	Adjustmentsto Operating Income Pre Tax AdjustmentstoOperatingIncomePreTax	-40000000	USD
CY2020Q1	ago	Adjustmentsto Operating Income Tax AdjustmentstoOperatingIncomeTax	14000000	USD
CY2019Q1	ago	Adjustmentsto Operating Income Tax AdjustmentstoOperatingIncomeTax	8000000	USD
CY2020Q1	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	33000000	USD
CY2019Q1	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	86000000	USD
CY2020Q1	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	190000000	USD
CY2019Q1	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	234000000	USD
CY2020Q1	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	190000000	USD
CY2019Q1	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	234000000	USD
CY2020Q1	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	146000000	USD
CY2019Q1	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	138000000	USD
CY2020Q1	ago	Insured Financial Obligations Outstanding Principal Amount Secondto Pay Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountSecondtoPayAmountNet	6200000000	USD
CY2019Q4	ago	Insured Financial Obligations Outstanding Principal Amount Secondto Pay Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountSecondtoPayAmountNet	6600000000	USD
CY2020Q1	ago	Insured Financial Obligations Loss Mitigation Securities InsuredFinancialObligationsLossMitigationSecurities	1400000000	USD
CY2020Q1	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Gross InsuredFinancialObligationsInsuredContractualPaymentsOutstandingGross	365356000000	USD
CY2019Q4	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Gross InsuredFinancialObligationsInsuredContractualPaymentsOutstandingGross	375776000000	USD
CY2020Q1	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Net InsuredFinancialObligationsInsuredContractualPaymentsOutstandingNet	363893000000	USD
CY2019Q4	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Net InsuredFinancialObligationsInsuredContractualPaymentsOutstandingNet	374130000000	USD
CY2020Q1	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	230898000000	USD
CY2020Q1	ago	Insured Financial Obligations Outstanding Principle Amount Percentage InsuredFinancialObligationsOutstandingPrincipleAmountPercentage	1.000
CY2019Q4	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	236807000000	USD
CY2019Q4	ago	Insured Financial Obligations Outstanding Principle Amount Percentage InsuredFinancialObligationsOutstandingPrincipleAmountPercentage	1.000
CY2020Q1	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	230898000000	USD
CY2019Q4	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	236807000000	USD
CY2020Q1	ago	Specialty Insuranceand Reinsurance Gross Par SpecialtyInsuranceandReinsuranceGrossPar	1484000000	USD
CY2019Q4	ago	Specialty Insuranceand Reinsurance Gross Par SpecialtyInsuranceandReinsuranceGrossPar	1444000000	USD
CY2020Q1	ago	Specialty Insuranceand Reinsurance Net Par SpecialtyInsuranceandReinsuranceNetPar	1178000000	USD
CY2019Q4	ago	Specialty Insuranceand Reinsurance Net Par SpecialtyInsuranceandReinsuranceNetPar	1141000000	USD
CY2020Q1	ago	Insured Financial Obligations Insured Credit Performanceof Guaranteed Obligations Term InsuredFinancialObligationsInsuredCreditPerformanceofGuaranteedObligationsTerm	P30Y
CY2020Q1	ago	Insured Financial Obligations Claim Liability Weighted Average Risk Free Discount Rate InsuredFinancialObligationsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0064
CY2019	ago	Insured Financial Obligations Claim Liability Weighted Average Risk Free Discount Rate InsuredFinancialObligationsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0194
CY2019Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	737000000	USD
CY2018Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	1183000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Accretion Of Discount GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount	4000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Accretion Of Discount GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount	8000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Discount Rates GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates	31000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Discount Rates GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates	-4000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Timing And Assumptions GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions	-38000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Timing And Assumptions GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions	-6000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-3000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-2000000	USD
CY2020Q1	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	74000000	USD
CY2019Q1	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	218000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	660000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	963000000	USD
CY2019Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	737000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-3000000	USD
CY2020Q1	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	74000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	660000000	USD
CY2018Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	1183000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-2000000	USD
CY2019Q1	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	218000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	963000000	USD
CY2020Q1	ago	Reinsurance Recoverables Periodafter Endof Reporting Periodfor Settlementof Ceded Paid Losses ReinsuranceRecoverablesPeriodafterEndofReportingPeriodforSettlementofCededPaidLosses	P45D
CY2020Q1	ago	Insured Financial Obligations Liabilityfor Unpaid Claims Adjustment Expense Claims Paid InsuredFinancialObligationsLiabilityforUnpaidClaimsAdjustmentExpenseClaimsPaid	3000000	USD
CY2019Q1	ago	Insured Financial Obligations Liabilityfor Unpaid Claims Adjustment Expense Claims Paid InsuredFinancialObligationsLiabilityforUnpaidClaimsAdjustmentExpenseClaimsPaid	7000000	USD
CY2020Q1	ago	Expected Loss Adjustment Expense To Be Paid ExpectedLossAdjustmentExpenseToBePaid	30000000	USD
CY2019Q4	ago	Expected Loss Adjustment Expense To Be Paid ExpectedLossAdjustmentExpenseToBePaid	33000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	660000000	USD
CY2019Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	737000000	USD
CY2020Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-3000000	USD
CY2019Q1	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-2000000	USD
CY2020Q1	ago	Additional Loss Recovery Assumption Recovery Period AdditionalLossRecoveryAssumptionRecoveryPeriod	P5Y
CY2020Q1	ago	Loss Recovery Assumption Additional Increasein Recovery Projection Percent LossRecoveryAssumptionAdditionalIncreaseinRecoveryProjectionPercent	0.30
CY2020Q1	ago	Loss Recovery Assumption Additional Increasein Recovery Projection Economic Benefit LossRecoveryAssumptionAdditionalIncreaseinRecoveryProjectionEconomicBenefit	55000000	USD
CY2020Q1	ago	Loss Recovery Assumption Additional Decreasein Recovery Projection Percent LossRecoveryAssumptionAdditionalDecreaseinRecoveryProjectionPercent	0.10
CY2020Q1	ago	Loss Recovery Assumption Additional Decreasein Recovery Projection Economic Loss LossRecoveryAssumptionAdditionalDecreaseinRecoveryProjectionEconomicLoss	55000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Scheduled Net Earned Premiums FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums	82000000	USD
CY2019Q1	ago	Financial Guarantee Insurance Contracts Scheduled Net Earned Premiums FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums	87000000	USD
CY2020Q1	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	15000000	USD
CY2019Q1	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	26000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Net Premiums Receivable Adjustment Accretionof Discounton Net Premium Receivable FinancialGuaranteeInsuranceContractsNetPremiumsReceivableAdjustmentAccretionofDiscountonNetPremiumReceivable	-5000000	USD
CY2019Q1	ago	Financial Guarantee Insurance Contracts Net Premiums Receivable Adjustment Accretionof Discounton Net Premium Receivable FinancialGuaranteeInsuranceContractsNetPremiumsReceivableAdjustmentAccretionofDiscountonNetPremiumReceivable	-4000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Premiums Earned Net FinancialGuaranteeInsuranceContractsPremiumsEarnedNet	102000000	USD
CY2019Q1	ago	Financial Guarantee Insurance Contracts Premiums Earned Net FinancialGuaranteeInsuranceContractsPremiumsEarnedNet	117000000	USD
CY2020Q1	ago	Premiums Earned Net Specialty Insuranceand Reinsurance PremiumsEarnedNetSpecialtyInsuranceandReinsurance	1000000	USD
CY2019Q1	ago	Premiums Earned Net Specialty Insuranceand Reinsurance PremiumsEarnedNetSpecialtyInsuranceandReinsurance	1000000	USD
CY2020Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	103000000	USD
CY2019Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	118000000	USD
CY2019Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1286000000	USD
CY2018Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	904000000	USD
CY2019Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	2000000	USD
CY2018Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	1000000	USD
CY2019Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	1284000000	USD
CY2018Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	903000000	USD
CY2020Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable New Business Written FinancialGuaranteeInsuranceContractsPremiumReceivableNewBusinessWritten	67000000	USD
CY2019Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable New Business Written FinancialGuaranteeInsuranceContractsPremiumReceivableNewBusinessWritten	41000000	USD
CY2020Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Proceeds From Premiums Received FinancialGuaranteeInsuranceContractsPremiumReceivableProceedsFromPremiumsReceived	60000000	USD
CY2019Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Proceeds From Premiums Received FinancialGuaranteeInsuranceContractsPremiumReceivableProceedsFromPremiumsReceived	54000000	USD
CY2020Q1	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	-4000000	USD
CY2019Q1	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	-4000000	USD
CY2020Q1	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable	3000000	USD
CY2019Q1	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable	1000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslation	-58000000	USD
CY2019Q1	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslation	9000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	1232000000	USD
CY2019Q1	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	896000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	1000000	USD
CY2019Q1	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	1000000	USD
CY2020Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1233000000	USD
CY2019Q1	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	897000000	USD
CY2020Q1	us-gaap	Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0064
CY2019	us-gaap	Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0194
CY2020Q1	ago	Reserve For Losses And Loss Adjustment Expenses Net Of Reinsurance And Salvage And Subrogation Recoveries ReserveForLossesAndLossAdjustmentExpensesNetOfReinsuranceAndSalvageAndSubrogationRecoveries	226000000	USD
CY2019Q4	ago	Reserve For Losses And Loss Adjustment Expenses Net Of Reinsurance And Salvage And Subrogation Recoveries ReserveForLossesAndLossAdjustmentExpensesNetOfReinsuranceAndSalvageAndSubrogationRecoveries	295000000	USD
CY2020Q1	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1050000000	USD
CY2019Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1050000000	USD
CY2020Q1	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	35000000	USD
CY2019Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	38000000	USD
CY2020Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1015000000	USD
CY2019Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1012000000	USD
CY2020Q1	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	820000000	USD
CY2019Q4	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	747000000	USD
CY2020Q1	ago	Ceded Salvage And Subrogation Recoveries Value CededSalvageAndSubrogationRecoveriesValue	31000000	USD
CY2019Q4	ago	Ceded Salvage And Subrogation Recoveries Value CededSalvageAndSubrogationRecoveriesValue	30000000	USD
CY2020Q1	ago	Reservefor Lossesand Loss Adjustment Expenses Netof Reinsuranceand Salvageand Subrogation Including Other Recoverables ReserveforLossesandLossAdjustmentExpensesNetofReinsuranceandSalvageandSubrogationIncludingOtherRecoverables	-789000000	USD
CY2019Q4	ago	Reservefor Lossesand Loss Adjustment Expenses Netof Reinsuranceand Salvageand Subrogation Including Other Recoverables ReserveforLossesandLossAdjustmentExpensesNetofReinsuranceandSalvageandSubrogationIncludingOtherRecoverables	-717000000	USD
CY2020Q1	ago	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Netof Reinsuranceand Salvage Subrogationand Other Recoveries LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetofReinsuranceandSalvageSubrogationandOtherRecoveries	226000000	USD
CY2019Q4	ago	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Netof Reinsuranceand Salvage Subrogationand Other Recoveries LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetofReinsuranceandSalvageSubrogationandOtherRecoveries	295000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed During Second Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedDuringSecondQuarterFollowingBalanceSheetDate	9000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed During Third Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedDuringThirdQuarterFollowingBalanceSheetDate	9000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed During Fourth Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedDuringFourthQuarterFollowingBalanceSheetDate	9000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed During Fiscal Year Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedDuringFiscalYearFollowingBalanceSheetDate	27000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Second Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinSecondFullFiscalYear	35000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Third Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinThirdFullFiscalYear	35000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Fourth Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinFourthFullFiscalYear	33000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Fifth Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinFifthFullFiscalYear	32000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Morethan Fiveand Within10 Yearsfrom Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedMorethanFiveandWithin10YearsfromBalanceSheetDate	134000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Morethan10andwithin15 Yearsfrom Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedMorethan10andwithin15YearsfromBalanceSheetDate	90000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Morethan15andwithin20 Yearsfrom Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedMorethan15andwithin20YearsfromBalanceSheetDate	32000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Beyond Twentieth Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedBeyondTwentiethFiscalYear	9000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Net Losstobe Expensed Present Value FinancialGuaranteeInsuranceContractsNetLosstobeExpensedPresentValue	427000000	USD
CY2020Q1	ago	Scheduleof Insured Financial Obligationswith Credit Deterioration Reductionsof Gross Claim Liability Netof Reinsurance Recoverable Discount ScheduleofInsuredFinancialObligationswithCreditDeteriorationReductionsofGrossClaimLiabilityNetofReinsuranceRecoverableDiscount	59000000	USD
CY2020Q1	ago	Financial Guarantee Insurance Contracts Net Losstobe Expensed Undiscounted FinancialGuaranteeInsuranceContractsNetLosstobeExpensedUndiscounted	486000000	USD
CY2020Q1	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	20000000	USD
CY2019Q1	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	46000000	USD
CY2020Q1	us-gaap	Direct Premiums Written DirectPremiumsWritten	64000000	USD
CY2019Q1	us-gaap	Direct Premiums Written DirectPremiumsWritten	39000000	USD
CY2020Q1	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
CY2019Q1	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
CY2020Q1	us-gaap	Ceded Premiums Written CededPremiumsWritten	0	USD
CY2019Q1	us-gaap	Ceded Premiums Written CededPremiumsWritten	-15000000	USD
CY2020Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	64000000	USD
CY2019Q1	us-gaap	Premiums Written Net PremiumsWrittenNet	54000000	USD
CY2020Q1	us-gaap	Direct Premiums Earned DirectPremiumsEarned	94000000	USD
CY2019Q1	us-gaap	Direct Premiums Earned DirectPremiumsEarned	105000000	USD
CY2020Q1	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	10000000	USD
CY2019Q1	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	15000000	USD
CY2020Q1	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1000000	USD
CY2019Q1	us-gaap	Ceded Premiums Earned CededPremiumsEarned	2000000	USD
CY2020Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	103000000	USD
CY2019Q1	us-gaap	Premiums Earned Net PremiumsEarnedNet	118000000	USD
CY2020Q1	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	8000000	USD
CY2019Q1	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	54000000	USD
CY2020Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	12000000	USD
CY2019Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	1000000	USD
CY2020Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	0	USD
CY2019Q1	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	9000000	USD
CY2020Q1	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	20000000	USD
CY2019Q1	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	46000000	USD
CY2020Q1	ago	Ceded Premium Payable Netof Commissions CededPremiumPayableNetofCommissions	19000000	USD
CY2019Q4	ago	Ceded Premium Payable Netof Commissions CededPremiumPayableNetofCommissions	20000000	USD
CY2020Q1	ago	Ceded Expected Loss And Loss Adjustment Expense CededExpectedLossAndLossAdjustmentExpense	7000000	USD
CY2019Q4	ago	Ceded Expected Loss And Loss Adjustment Expense CededExpectedLossAndLossAdjustmentExpense	11000000	USD
CY2020Q1	ago	Insured Financial Obligations Ceded Par Outstanding InsuredFinancialObligationsCededParOutstanding	1255000000	USD
CY2019Q4	ago	Insured Financial Obligations Ceded Par Outstanding InsuredFinancialObligationsCededParOutstanding	1349000000	USD
CY2020Q1	ago	Specialty Insuranceand Reinsurance Ceded Par Outstanding SpecialtyInsuranceandReinsuranceCededParOutstanding	306000000	USD
CY2019Q4	ago	Specialty Insuranceand Reinsurance Ceded Par Outstanding SpecialtyInsuranceandReinsuranceCededParOutstanding	303000000	USD
CY2020Q1	ago	Numberof Consolidated Investment Managed Collateralized Loan Obligations NumberofConsolidatedInvestmentManagedCollateralizedLoanObligations	1	Consolidated_Collateralized_Loan_obligations
CY2020Q1	ago	Numberof Consolidated Investment Managed Funds NumberofConsolidatedInvestmentManagedFunds	3	Consolidated_Investment_Management_Funds
CY2020Q1	ago	Numberof Outside Managers Managing Investment Portfolio NumberofOutsideManagersManagingInvestmentPortfolio	6	manager
CY2020Q1	us-gaap	Short Term Investments ShortTermInvestments	933000000	USD
CY2019Q4	us-gaap	Short Term Investments ShortTermInvestments	1268000000	USD
CY2020Q1	us-gaap	Investments Investments	9622000000	USD
CY2019Q4	us-gaap	Investments Investments	10240000000	USD
CY2020Q1	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	83000000	USD
CY2019Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	79000000	USD
CY2020Q1	ago	Percentageof Availableforsale Securitiesat Amortized Cost PercentageofAvailableforsaleSecuritiesatAmortizedCost	1
CY2020Q1	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	9343000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	-73000000	USD
CY2020Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	407000000	USD
CY2020Q1	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	176000000	USD
CY2020Q1	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	9501000000	USD
CY2020Q1	ago	Accumulated Other Comprehensive Income Loss Otherthan Temporary Impairment Not Credit Loss Before Tax Debt Securities Total AccumulatedOtherComprehensiveIncomeLossOtherthanTemporaryImpairmentNotCreditLossBeforeTaxDebtSecuritiesTotal	-83000000	USD
CY2019Q4	ago	Percentageof Availableforsale Securitiesat Amortized Cost PercentageofAvailableforsaleSecuritiesatAmortizedCost	1
CY2019Q4	us-gaap	Available For Sale Debt Securities Amortized Cost Basis AvailableForSaleDebtSecuritiesAmortizedCostBasis	9639000000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	517000000	USD
CY2019Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	34000000	USD
CY2019Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	10122000000	USD
CY2019Q4	ago	Accumulated Other Comprehensive Income Loss Otherthan Temporary Impairment Not Credit Loss Before Tax Debt Securities Total AccumulatedOtherComprehensiveIncomeLossOtherthanTemporaryImpairmentNotCreditLossBeforeTaxDebtSecuritiesTotal	59000000	USD
CY2020Q1	ago	Government Agency Obligations As Percentage Of Total Mortgage Backed Securities GovernmentAgencyObligationsAsPercentageOfTotalMortgageBackedSecurities	0.44
CY2019Q4	ago	Government Agency Obligations As Percentage Of Total Mortgage Backed Securities GovernmentAgencyObligationsAsPercentageOfTotalMortgageBackedSecurities	0.42
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	1390000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	62000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	260000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	30000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1650000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	92000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	376	Security
CY2020Q1	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	79	Security
CY2020Q1	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	430	Security
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	145000000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	1000000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	442000000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	33000000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	587000000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	34000000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	57	Security
CY2019Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	119	Security
CY2019Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	176	Security
CY2019Q4	ago	Debt Securities Availableforsale Other Than Temporary Impairment Continuous Unrealized Loss Position Lessthan12 Months Number DebtSecuritiesAvailableforsaleOtherThanTemporaryImpairmentContinuousUnrealizedLossPositionLessthan12MonthsNumber	1	Security
CY2019Q4	ago	Debt Securities Availableforsale Other Than Temporary Impairment Continuous Unrealized Loss Position Twelve Monthsor Longer Number DebtSecuritiesAvailableforsaleOtherThanTemporaryImpairmentContinuousUnrealizedLossPositionTwelveMonthsorLongerNumber	7	Security
CY2019Q4	ago	Debt Securities Availableforsale Other Than Temporary Impairment Continuous Unrealized Loss Position Number DebtSecuritiesAvailableforsaleOtherThanTemporaryImpairmentContinuousUnrealizedLossPositionNumber	8	Security
CY2020Q1	ago	Available For Sale Securities Continuous Unrealized Loss Position Greater Than10 Percent Of Book Value Twelve Months Or Longer Number AvailableForSaleSecuritiesContinuousUnrealizedLossPositionGreaterThan10PercentOfBookValueTwelveMonthsOrLongerNumber	57	Security
CY2020Q1	ago	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Greater Than10 Percent Book Value Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerGreaterThan10PercentBookValueAggregateLosses	33000000	USD
CY2019Q4	ago	Available For Sale Securities Continuous Unrealized Loss Position Greater Than10 Percent Of Book Value Twelve Months Or Longer Number AvailableForSaleSecuritiesContinuousUnrealizedLossPositionGreaterThan10PercentOfBookValueTwelveMonthsOrLongerNumber	19	Security
CY2019Q4	ago	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Greater Than10 Percent Book Value Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerGreaterThan10PercentBookValueAggregateLosses	25000000	USD
CY2020Q1	us-gaap	Assets Held In Trust AssetsHeldInTrust	277000000	USD
CY2019Q4	us-gaap	Assets Held In Trust AssetsHeldInTrust	280000000	USD
CY2020Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	82000000	USD
CY2019Q1	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	100000000	USD
CY2020Q1	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	2000000	USD
CY2019Q1	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	2000000	USD
CY2020Q1	us-gaap	Net Investment Income NetInvestmentIncome	80000000	USD
CY2019Q1	us-gaap	Net Investment Income NetInvestmentIncome	98000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	7000000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	6000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	1000000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	2000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	11000000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	16000000	USD
CY2020Q1	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	-5000000	USD
CY2019Q1	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	-12000000	USD
CY2020Q1	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	3000000	USD
CY2019Q1	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	1000000	USD
CY2020Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	86000000	USD
CY2019Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	471000000	USD
CY2019Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	0	USD
CY2018Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	-185000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	2000000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	0	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Purchased With Credit Deterioration Increase DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	-9000000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Purchased With Credit Deterioration Increase DebtSecuritiesAvailableForSaleAllowanceForCreditLossPurchasedWithCreditDeteriorationIncrease	-12000000	USD
CY2020Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	-73000000	USD
CY2019Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	-197000000	USD
CY2020Q1	us-gaap	Average Term Of Credit Risk Derivatives1 AverageTermOfCreditRiskDerivatives1	P11Y3M18D
CY2019	us-gaap	Average Term Of Credit Risk Derivatives1 AverageTermOfCreditRiskDerivatives1	P11Y6M
CY2020Q1	ago	Financial Guaranty Contracts Accountedforas Credit Derivatives Outstanding Principal Amount FinancialGuarantyContractsAccountedforasCreditDerivativesOutstandingPrincipalAmount	5806000000	USD
CY2020Q1	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-262000000	USD
CY2019Q4	ago	Financial Guaranty Contracts Accountedforas Credit Derivatives Outstanding Principal Amount FinancialGuarantyContractsAccountedforasCreditDerivativesOutstandingPrincipalAmount	5956000000	USD
CY2019Q4	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-185000000	USD
CY2020Q1	ago	Expected Losson Credit Derivativeto Be Paid Recovered Including Representationand Warranty Liability Benefit ExpectedLossonCreditDerivativetoBePaidRecoveredIncludingRepresentationandWarrantyLiabilityBenefit	-13000000	USD
CY2019Q4	ago	Expected Losson Credit Derivativeto Be Paid Recovered Including Representationand Warranty Liability Benefit ExpectedLossonCreditDerivativetoBePaidRecoveredIncludingRepresentationandWarrantyLiabilityBenefit	-4000000	USD
CY2020Q1	ago	Credit Derivative Realized Gains CreditDerivativeRealizedGains	2000000	USD
CY2019Q1	ago	Credit Derivative Realized Gains CreditDerivativeRealizedGains	3000000	USD
CY2020Q1	ago	Credit Derivative Losses CreditDerivativeLosses	2000000	USD
CY2019Q1	ago	Credit Derivative Losses CreditDerivativeLosses	4000000	USD
CY2020Q1	ago	Credit Derivative Realized Gain Lossand Other Settlements CreditDerivativeRealizedGainLossandOtherSettlements	0	USD
CY2019Q1	ago	Credit Derivative Realized Gain Lossand Other Settlements CreditDerivativeRealizedGainLossandOtherSettlements	-1000000	USD
CY2020Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-77000000	USD
CY2019Q1	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-21000000	USD
CY2020Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-77000000	USD
CY2019Q1	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-22000000	USD
CY2020Q1	ago	Credit Risk Derivatives At Fair Value Before Effect Of Credit Spread Net CreditRiskDerivativesAtFairValueBeforeEffectOfCreditSpreadNet	-478000000	USD
CY2019Q4	ago	Credit Risk Derivatives At Fair Value Before Effect Of Credit Spread Net CreditRiskDerivativesAtFairValueBeforeEffectOfCreditSpreadNet	-261000000	USD
CY2020Q1	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	216000000	USD
CY2019Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	76000000	USD
CY2020Q1	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-262000000	USD
CY2019Q4	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-185000000	USD
CY2020Q1	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	23000000	USD
CY2020Q1	us-gaap	Variable Interest Entity Entity Maximum Loss Exposure Amount VariableInterestEntityEntityMaximumLossExposureAmount	0	USD
CY2020Q1	ago	Variable Interest Entities Collateralized Loan Obligations Weighted Average Maturity VariableInterestEntitiesCollateralizedLoanObligationsWeightedAverageMaturity	P6Y3M18D
CY2020Q1	ago	Variable Interest Entities Collateralized Loan Obligations Weighted Average Interest Rate VariableInterestEntitiesCollateralizedLoanObligationsWeightedAverageInterestRate	0.038
CY2019	ago	Variable Interest Entities Collateralized Loan Obligations Weighted Average Maturity VariableInterestEntitiesCollateralizedLoanObligationsWeightedAverageMaturity	P12Y9M18D
CY2019Q4	ago	Variable Interest Entities Collateralized Loan Obligations Weighted Average Interest Rate VariableInterestEntitiesCollateralizedLoanObligationsWeightedAverageInterestRate	0.038
CY2019Q4	us-gaap	Redeemable Noncontrolling Interest Equity Other Fair Value RedeemableNoncontrollingInterestEquityOtherFairValue	7000000	USD
CY2020Q1	ago	Redeemable Noncontrolling Interest Equity Other Reallocationof Ownership Interests RedeemableNoncontrollingInterestEquityOtherReallocationofOwnershipInterests	-2000000	USD
CY2020Q1	ago	Redeemable Noncontrolling Interest Equity Other Contributionsto Investment Vehicles RedeemableNoncontrollingInterestEquityOtherContributionstoInvestmentVehicles	5000000	USD
CY2020Q1	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	-2000000	USD
CY2020Q1	us-gaap	Redeemable Noncontrolling Interest Equity Other Fair Value RedeemableNoncontrollingInterestEquityOtherFairValue	8000000	USD
CY2020Q1	ago	Variable Interest Entity Other Consolidated Carrying Amount Assets VariableInterestEntityOtherConsolidatedCarryingAmountAssets	93000000	USD
CY2020Q1	ago	Variable Interest Entity Other Consolidated Carrying Amount Liabilities VariableInterestEntityOtherConsolidatedCarryingAmountLiabilities	23000000	USD
CY2019Q4	ago	Variable Interest Entity Other Consolidated Carrying Amount Assets VariableInterestEntityOtherConsolidatedCarryingAmountAssets	91000000	USD
CY2019Q4	ago	Variable Interest Entity Other Consolidated Carrying Amount Liabilities VariableInterestEntityOtherConsolidatedCarryingAmountLiabilities	12000000	USD
CY2020Q1	ago	Variable Interest Entity Numberof Policies Monitored VariableInterestEntityNumberofPoliciesMonitored	18000	policy
CY2020Q1	ago	Variable Interest Entity Numberof Policies Monitored Not Withinthe Scopeof Asc810 VariableInterestEntityNumberofPoliciesMonitoredNotWithintheScopeofASC810	16000	policy
CY2020Q1	ago	Variable Interest Entity Numberof Policiesthat Contain Provisionsfor Consolidation VariableInterestEntityNumberofPoliciesthatContainProvisionsforConsolidation	87	policy
CY2019Q4	ago	Variable Interest Entity Numberof Policiesthat Contain Provisionsfor Consolidation VariableInterestEntityNumberofPoliciesthatContainProvisionsforConsolidation	90	policy
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	17000000	USD
CY2020Q1	ago	Deferred Tax Assets Liabilities Net Current1 DeferredTaxAssetsLiabilitiesNetCurrent1	58000000	USD
CY2019Q4	ago	Deferred Tax Assets Liabilities Net Current1 DeferredTaxAssetsLiabilitiesNetCurrent1	47000000	USD
CY2020Q1	ago	Tax Cutsand Jobs Actof2017 Incomplete Accounting Transition Taxfor Accumulated Foreign Earnings Tax Credit Realized TaxCutsandJobsActof2017IncompleteAccountingTransitionTaxforAccumulatedForeignEarningsTaxCreditRealized	23000000	USD
CY2020Q1	us-gaap	Deferred Tax Assets Liabilities Net DeferredTaxAssetsLiabilitiesNet	14000000	USD
CY2020Q1	us-gaap	Tax Credit Carryforward Valuation Allowance TaxCreditCarryforwardValuationAllowance	36000000	USD
CY2020Q1	ago	Deferred Tax Assets Realization Assessment Period For Which Cumulative Operating Income Considered DeferredTaxAssetsRealizationAssessmentPeriodForWhichCumulativeOperatingIncomeConsidered	P3Y
CY2020Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-11000000	USD
CY2019Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	9000000	USD
CY2020Q1	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	4000000	USD
CY2019Q1	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	5000000	USD
CY2020Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1000000	USD
CY2019Q1	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1000000	USD
CY2020Q1	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	8000000	USD
CY2019Q1	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	1000000	USD
CY2020Q1	ago	Effective Income Tax Rate Reconciliation Taxeson Reinsurance Amount EffectiveIncomeTaxRateReconciliationTaxesonReinsuranceAmount	0	USD
CY2019Q1	ago	Effective Income Tax Rate Reconciliation Taxeson Reinsurance Amount EffectiveIncomeTaxRateReconciliationTaxesonReinsuranceAmount	1000000	USD
CY2020Q1	ago	Effective Income Tax Rate Reconciliation Nondeductible Expense Deferred Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDeferredCompensationAmount	2000000	USD
CY2019Q1	ago	Effective Income Tax Rate Reconciliation Nondeductible Expense Deferred Compensation Amount EffectiveIncomeTaxRateReconciliationNondeductibleExpenseDeferredCompensationAmount	-2000000	USD
CY2020Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	0	USD
CY2019Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1000000	USD
CY2020Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-4000000	USD
CY2019Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	4000000	USD
CY2020Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.071
CY2019Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.078
CY2020Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	-62000000	USD
CY2019Q1	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	58000000	USD
CY2020Q1	us-gaap	Revenues Revenues	96000000	USD
CY2019Q1	us-gaap	Revenues Revenues	195000000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	200000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Income Tax Penalties And Interest Expense UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense	1000000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits Interest On Income Taxes Accrued UnrecognizedTaxBenefitsInterestOnIncomeTaxesAccrued	2000000	USD
CY2020Q1	us-gaap	Unrecognized Tax Benefits That Would Impact Effective Tax Rate UnrecognizedTaxBenefitsThatWouldImpactEffectiveTaxRate	17000000	USD
CY2020Q1	us-gaap	Cumulative Effect Of New Accounting Principle In Period Of Adoption CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption	0	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-208000000	USD
CY2020Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-204000000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	156000000	USD
CY2019Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	168000000	USD
CY2020Q1	us-gaap	Net Income Loss NetIncomeLoss	-55000000	USD
CY2019Q1	us-gaap	Net Income Loss NetIncomeLoss	54000000	USD
CY2020Q1	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2019Q1	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-55000000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	54000000	USD
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92600000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	103000000.0	shares
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.59
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.52
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-55000000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	54000000	USD
CY2020Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
CY2019Q1	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	-55000000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	54000000	USD
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	92600000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	103000000.0	shares
CY2020Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	0	shares
CY2019Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	1000000.0	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	92600000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	104000000.0	shares
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.59
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.52
CY2020Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1700000	shares
CY2019Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares

Files In Submission

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0001273813-20-000017-index-headers.html	Edgar Link	pending
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$AGO
ASSURED GUARANTY LTD Stock $ago

2020 Q1 Form 10-Q Financial Statement

#000127381320000017 Filed on May 08, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AGO ASSURED GUARANTY LTD Stock $ago

2020 Q1 Form 10-Q Financial Statement

#000127381320000017 Filed on May 08, 2020

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AGO
ASSURED GUARANTY LTD Stock $ago