10-K Filing

ASSURED GUARANTY LTD CIK: 1273813 FY 2020

Filing Information

Form Type	10-K
Accession Number	`0001273813-21-000004`
Period End Date	20201231
Filing Date	20210226
Fiscal Year	2020
Fiscal Period	FY
XBRL Instance	ago-20201231_htm.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 91 Income Statement 84 Cash Flow Statement 162 Stockholders Equity 31 Comprehensive Income 39

Balance Sheet 91 line items

Line Item	Tag	Value	Unit	Period
Fixed-maturity securities, available-for-sale, at fair value (amortized cost of $8,204 and $8,371, allowance for credit loss of $78 at December 31, 2020)	`DebtSecuritiesAvailableForSaleExcludingShortTermInvestments`	$8.77B	USD	Point-in-time
Fixed-maturity securities, available-for-sale, at fair value (amortized cost of $8,204 and $8,371, allowance for credit loss of $78 at December 31, 2020)	`DebtSecuritiesAvailableForSaleExcludingShortTermInvestments`	$8.85B	USD	Point-in-time
Short-term investments, at fair value	`ShortTermInvestments`	$851.00M	USD	Point-in-time
Short-term investments, at fair value	`ShortTermInvestments`	$1.27B	USD	Point-in-time
Other invested assets (includes $106 and $6 measured at fair value)	`OtherInvestments`	$118.00M	USD	Point-in-time
Other invested assets (includes $106 and $6 measured at fair value)	`OtherInvestments`	$214.00M	USD	Point-in-time
Total investment portfolio	`Investments`	$10.24B	USD	Point-in-time
Amortized Cost	`AvailableForSaleDebtSecuritiesAmortizedCostBasis`	$9.05B	USD	Point-in-time
Amortized Cost	`AvailableForSaleDebtSecuritiesAmortizedCostBasis`	$9.64B	USD	Point-in-time
Total investment portfolio	`Investments`	$9.84B	USD	Point-in-time
Allowance for credit loss	`DebtSecuritiesAvailableForSaleAllowanceForCreditLoss`	$78.00M	USD	Point-in-time
Cash	`Cash`	$104.00M	USD	Point-in-time
Allowance for credit loss	`DebtSecuritiesAvailableForSaleAllowanceForCreditLoss`	-	USD	Point-in-time
Cash	`Cash`	$162.00M	USD	Point-in-time
Cash	`Cash`	$169.00M	USD	Point-in-time
Other invested assets, fair value disclosure	`OtherInvestmentsFairValueDisclosure`	$106.00M	USD	Point-in-time
Premiums receivable, net of commissions payable	`PremiumsReceivableAtCarryingValue`	$1.37B	USD	Point-in-time
Premiums receivable, net of commissions payable	`PremiumsReceivableAtCarryingValue`	$1.29B	USD	Point-in-time
Other invested assets, fair value disclosure	`OtherInvestmentsFairValueDisclosure`	$6.00M	USD	Point-in-time
Deferred acquisition costs	`DeferredPolicyAcquisitionCosts`	$101.00M	USD	Point-in-time
Deferred acquisition costs	`DeferredPolicyAcquisitionCosts`	$105.00M	USD	Point-in-time
Assets of consolidated investment vehicles, fair value disclosure	`AssetsofConsolidatedInvestmentVehiclesFairValueDisclosure`	$1.73B	USD	Point-in-time
Deferred acquisition costs	`DeferredPolicyAcquisitionCosts`	$111.00M	USD	Point-in-time
Assets of consolidated investment vehicles, fair value disclosure	`AssetsofConsolidatedInvestmentVehiclesFairValueDisclosure`	$558.00M	USD	Point-in-time
Deferred acquisition costs	`DeferredPolicyAcquisitionCosts`	$119.00M	USD	Point-in-time
Other assets, fair value disclosure	`OtherAssetsFairValueDisclosure`	$145.00M	USD	Point-in-time
Other assets, fair value disclosure	`OtherAssetsFairValueDisclosure`	$135.00M	USD	Point-in-time
Salvage and subrogation recoverable	`SalvageAndSubrogationRecoveriesValue`	$747.00M	USD	Point-in-time
Salvage and subrogation recoverable	`SalvageAndSubrogationRecoveriesValue`	$991.00M	USD	Point-in-time
Liabilities of consolidated investment vehicles, fair value disclosure	`LiabilitiesofConsolidatedInvestmentVehiclesFairValueDisclosure`	$481.00M	USD	Point-in-time
Financial guaranty variable interest entities assets, at fair value	`FinancialGuarantyOfVariableInterestEntitiesAssetsHeld`	$442.00M	USD	Point-in-time
Liabilities of consolidated investment vehicles, fair value disclosure	`LiabilitiesofConsolidatedInvestmentVehiclesFairValueDisclosure`	$1.30B	USD	Point-in-time
Financial guaranty variable interest entities assets, at fair value	`FinancialGuarantyOfVariableInterestEntitiesAssetsHeld`	$296.00M	USD	Point-in-time
Common stock par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Assets of consolidated investment vehicles (includes $1,727 and $558 measured at fair value)	`AssetsofConsolidatedInvestmentVehicles`	$1.91B	USD	Point-in-time
Common stock par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Assets of consolidated investment vehicles (includes $1,727 and $558 measured at fair value)	`AssetsofConsolidatedInvestmentVehicles`	$572.00M	USD	Point-in-time
Goodwill and other intangible assets	`IntangibleAssetsNetIncludingGoodwill`	$216.00M	USD	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Goodwill and other intangible assets	`IntangibleAssetsNetIncludingGoodwill`	$203.00M	USD	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	500.00M	shares	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	93.27M	shares	Point-in-time
Other assets (includes $145 and $135 measured at fair value)	`OtherAssets`	$440.00M	USD	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	77.55M	shares	Point-in-time
Other assets (includes $145 and $135 measured at fair value)	`OtherAssets`	$543.00M	USD	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	93.27M	shares	Point-in-time
Common stock, shares outstanding (in shares)	`CommonStockSharesOutstanding`	77.55M	shares	Point-in-time
Total assets	`Assets`	$15.33B	USD	Point-in-time
Total assets	`Assets`	$14.33B	USD	Point-in-time
Accumulated other comprehensive income, tax provision	`AociTaxAttributableToParent`	$89.00M	USD	Point-in-time
Accumulated other comprehensive income, tax provision	`AociTaxAttributableToParent`	$71.00M	USD	Point-in-time
Unearned premium reserve	`UnearnedPremiums`	$3.73B	USD	Point-in-time
Unearned premium reserve	`UnearnedPremiums`	$3.74B	USD	Point-in-time
Loss and loss adjustment expense reserve	`LiabilityForClaimsAndClaimsAdjustmentExpense`	$1.09B	USD	Point-in-time
Loss and loss adjustment expense reserve	`LiabilityForClaimsAndClaimsAdjustmentExpense`	$1.05B	USD	Point-in-time
Long-term debt	`LongTermDebt`	$1.22B	USD	Point-in-time
Long-term debt	`LongTermDebt`	$1.24B	USD	Point-in-time
Credit derivative liabilities, at fair value	`CreditRiskDerivativeLiabilitiesAtFairValue`	$103.00M	USD	Point-in-time
Credit derivative liabilities, at fair value	`CreditRiskDerivativeLiabilitiesAtFairValue`	$191.00M	USD	Point-in-time
Financial guaranty variable interest entities liabilities with recourse, at fair value	`VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithRecourse`	$367.00M	USD	Point-in-time
Financial guaranty variable interest entities liabilities with recourse, at fair value	`VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithRecourse`	$316.00M	USD	Point-in-time
Financial guaranty variable interest entities liabilities without recourse, at fair value	`VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithoutRecourse`	$17.00M	USD	Point-in-time
Financial guaranty variable interest entities liabilities without recourse, at fair value	`VariableInterestEntityConsolidatedCarryingAmountLiabilitiesWithoutRecourse`	$102.00M	USD	Point-in-time
Liabilities of consolidated investment vehicles (includes $1,299 and $481 measured at fair value)	`LiabilitiesofConsolidatedInvestmentsVehicles`	$482.00M	USD	Point-in-time
Liabilities of consolidated investment vehicles (includes $1,299 and $481 measured at fair value)	`LiabilitiesofConsolidatedInvestmentsVehicles`	$1.59B	USD	Point-in-time
Other liabilities	`OtherLiabilities`	$556.00M	USD	Point-in-time
Other liabilities	`OtherLiabilities`	$511.00M	USD	Point-in-time
Total liabilities	`Liabilities`	$8.63B	USD	Point-in-time
Total liabilities	`Liabilities`	$7.67B	USD	Point-in-time
Commitments and contingencies (see Note 19)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Commitments and contingencies (see Note 19)	`CommitmentsAndContingencies`	-	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityOtherCarryingAmount`	$7.00M	USD	Point-in-time
Redeemable noncontrolling interests	`RedeemableNoncontrollingInterestEquityOtherCarryingAmount`	$21.00M	USD	Point-in-time
Common shares ($0.01 par value, 500,000,000 shares authorized; 77,546,896 and 93,274,987 shares issued and outstanding)	`CommonStockValue`	$1.00M	USD	Point-in-time
Common shares ($0.01 par value, 500,000,000 shares authorized; 77,546,896 and 93,274,987 shares issued and outstanding)	`CommonStockValue`	$1.00M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$6.14B	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$6.29B	USD	Point-in-time
Accumulated other comprehensive income, net of tax of $89 and $71	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$498.00M	USD	Point-in-time
Accumulated other comprehensive income, net of tax of $89 and $71	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$342.00M	USD	Point-in-time
Deferred equity compensation	`CompensationAndBenefitsTrust`	$1.00M	USD	Point-in-time
Deferred equity compensation	`CompensationAndBenefitsTrust`	$1.00M	USD	Point-in-time
Total shareholders equity attributable to Assured Guaranty Ltd.	`StockholdersEquity`	$6.64B	USD	Point-in-time
Total shareholders equity attributable to Assured Guaranty Ltd.	`StockholdersEquity`	$6.64B	USD	Point-in-time
Nonredeemable noncontrolling interests	`MinorityInterest`	$6.00M	USD	Point-in-time
Nonredeemable noncontrolling interests	`MinorityInterest`	$41.00M	USD	Point-in-time
Total shareholders equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.55B	USD	Point-in-time
Total shareholders equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.68B	USD	Point-in-time
Total shareholders equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.84B	USD	Point-in-time
Total shareholders equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.64B	USD	Point-in-time
Total liabilities, redeemable noncontrolling interests and shareholders equity	`LiabilitiesAndStockholdersEquity`	$14.33B	USD	Point-in-time
Total liabilities, redeemable noncontrolling interests and shareholders equity	`LiabilitiesAndStockholdersEquity`	$15.33B	USD	Point-in-time

Income Statement 84 line items

Line Item	Tag	Value	Unit	Period
Net earned premiums	`PremiumsEarnedNet`	$548.00M	USD	Annual
Net earned premiums	`PremiumsEarnedNet`	$485.00M	USD	Annual
Net earned premiums	`PremiumsEarnedNet`	$476.00M	USD	Annual
Net investment income	`NetInvestmentIncome`	$395.00M	USD	Annual
Net investment income	`NetInvestmentIncome`	$378.00M	USD	Annual
Net investment income	`NetInvestmentIncome`	$297.00M	USD	Annual
Asset management fees	`RevenueFromContractWithCustomerExcludingAssessedTax`	$22.00M	USD	Annual
Asset management fees	`RevenueFromContractWithCustomerExcludingAssessedTax`	-	USD	Annual
Asset management fees	`RevenueFromContractWithCustomerExcludingAssessedTax`	$89.00M	USD	Annual
Net realized investment gains (losses)	`RealizedInvestmentGainsLosses`	$-32.00M	USD	Annual
Net realized investment gains (losses)	`RealizedInvestmentGainsLosses`	$22.00M	USD	Annual
Net realized investment gains (losses)	`RealizedInvestmentGainsLosses`	$18.00M	USD	Annual
Net change in fair value of credit derivatives	`DerivativeGainLossOnDerivativeNet`	$112.00M	USD	Annual
Net change in fair value of credit derivatives	`DerivativeGainLossOnDerivativeNet`	$81.00M	USD	Annual
Net change in fair value of credit derivatives	`DerivativeGainLossOnDerivativeNet`	$-6.00M	USD	Annual
Fair value gains (losses) on financial guaranty variable interest entities	`VariableInterestEntityChangeinFairValue`	$14.00M	USD	Annual
Fair value gains (losses) on financial guaranty variable interest entities	`VariableInterestEntityChangeinFairValue`	$42.00M	USD	Annual
Fair value gains (losses) on financial guaranty variable interest entities	`VariableInterestEntityChangeinFairValue`	$-10.00M	USD	Annual
Fair value gains (losses) on consolidated investment vehicles	`FairValueGainLossOnConsolidatedInvestmentVehicles`	$41.00M	USD	Annual
Fair value gains (losses) on consolidated investment vehicles	`FairValueGainLossOnConsolidatedInvestmentVehicles`	$-3.00M	USD	Annual
Fair value gains (losses) on consolidated investment vehicles	`FairValueGainLossOnConsolidatedInvestmentVehicles`	-	USD	Annual
Foreign exchange gains (losses) on remeasurement	`ForeignCurrencyTransactionGainLossBeforeTax`	$39.00M	USD	Annual
Foreign exchange gains (losses) on remeasurement	`ForeignCurrencyTransactionGainLossBeforeTax`	$-37.00M	USD	Annual
Foreign exchange gains (losses) on remeasurement	`ForeignCurrencyTransactionGainLossBeforeTax`	$24.00M	USD	Annual
Commutation gains (losses)	`GainLossFromCommutations`	$38.00M	USD	Annual
Commutation gains (losses)	`GainLossFromCommutations`	$1.00M	USD	Annual
Commutation gains (losses)	`GainLossFromCommutations`	$-16.00M	USD	Annual
Other income (loss)	`OtherIncome`	$37.00M	USD	Annual
Other income (loss)	`OtherIncome`	$17.00M	USD	Annual
Other income (loss)	`OtherIncome`	$7.00M	USD	Annual
Total revenues	`Revenues`	$1.00B	USD	Annual
Total revenues	`Revenues`	$1.11B	USD	Annual
Total revenues	`Revenues`	$963.00M	USD	Annual
Loss and loss adjustment expenses	`PolicyholderBenefitsAndClaimsIncurredNet`	$203.00M	USD	Annual
Loss and loss adjustment expenses	`PolicyholderBenefitsAndClaimsIncurredNet`	$64.00M	USD	Annual
Loss and loss adjustment expenses	`PolicyholderBenefitsAndClaimsIncurredNet`	$93.00M	USD	Annual
Interest expense	`InterestExpense`	$89.00M	USD	Annual
Interest expense	`InterestExpense`	$94.00M	USD	Annual
Interest expense	`InterestExpense`	$85.00M	USD	Annual
Amortization of deferred acquisition costs	`DeferredPolicyAcquisitionCostAmortizationExpense`	$18.00M	USD	Annual
Amortization of deferred acquisition costs	`DeferredPolicyAcquisitionCostAmortizationExpense`	$16.00M	USD	Annual
Amortization of deferred acquisition costs	`DeferredPolicyAcquisitionCostAmortizationExpense`	$16.00M	USD	Annual
Employee compensation and benefit expenses	`EmployeeBenefitsAndShareBasedCompensation`	$178.00M	USD	Annual
Employee compensation and benefit expenses	`EmployeeBenefitsAndShareBasedCompensation`	$228.00M	USD	Annual
Employee compensation and benefit expenses	`EmployeeBenefitsAndShareBasedCompensation`	$152.00M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$125.00M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$96.00M	USD	Annual
Other operating expenses	`OtherCostAndExpenseOperating`	$197.00M	USD	Annual
Total expenses	`BenefitsLossesAndExpenses`	$729.00M	USD	Annual
Total expenses	`BenefitsLossesAndExpenses`	$503.00M	USD	Annual
Total expenses	`BenefitsLossesAndExpenses`	$422.00M	USD	Annual
Income (loss) before income taxes and equity in earnings of investees	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$386.00M	USD	Annual
Income (loss) before income taxes and equity in earnings of investees	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$460.00M	USD	Annual
Income (loss) before income taxes and equity in earnings of investees	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$579.00M	USD	Annual
Equity in earnings of investees	`IncomeLossFromEquityMethodInvestments`	$4.00M	USD	Annual
Equity in earnings of investees	`IncomeLossFromEquityMethodInvestments`	$27.00M	USD	Annual
Equity in earnings of investees	`IncomeLossFromEquityMethodInvestments`	$1.00M	USD	Annual
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$413.00M	USD	Annual
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$580.00M	USD	Annual
Income (loss) before income taxes	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest`	$464.00M	USD	Annual
Current	`CurrentIncomeTaxExpenseBenefit`	$-2.00M	USD	Annual
Current	`CurrentIncomeTaxExpenseBenefit`	$-15.00M	USD	Annual
Current	`CurrentIncomeTaxExpenseBenefit`	$-13.00M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$65.00M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$74.00M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$58.00M	USD	Annual
Total provision (benefit) for income taxes	`IncomeTaxExpenseBenefit`	$45.00M	USD	Annual
Total provision (benefit) for income taxes	`IncomeTaxExpenseBenefit`	$59.00M	USD	Annual
Total provision (benefit) for income taxes	`IncomeTaxExpenseBenefit`	$63.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$368.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$401.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$521.00M	USD	Annual
Less: Noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$-1.00M	USD	Annual
Less: Noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Less: Noncontrolling interests	`NetIncomeLossAttributableToNoncontrollingInterest`	-	USD	Annual
Net income (loss) attributable to Assured Guaranty Ltd.	`NetIncomeLoss`	$402.00M	USD	Annual
Net income (loss) attributable to Assured Guaranty Ltd.	`NetIncomeLoss`	$521.00M	USD	Annual
Net income (loss) attributable to Assured Guaranty Ltd.	`NetIncomeLoss`	$362.00M	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$4.04	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$4.22	USD	Annual
Basic (in dollars per share)	`EarningsPerShareBasic`	$4.73	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$4.19	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$4.00	USD	Annual
Diluted (in dollars per share)	`EarningsPerShareDiluted`	$4.68	USD	Annual

Cash Flow Statement 162 line items

Line Item	Tag	Value	Unit	Period
Net Income	`ProfitLoss`	$368.00M	USD	Annual
Net Income	`ProfitLoss`	$401.00M	USD	Annual
Net Income	`ProfitLoss`	$521.00M	USD	Annual
Non-cash interest and operating expenses	`OtherNoncashIncomeExpense`	$-54.00M	USD	Annual
Non-cash interest and operating expenses	`OtherNoncashIncomeExpense`	$-36.00M	USD	Annual
Non-cash interest and operating expenses	`OtherNoncashIncomeExpense`	$-34.00M	USD	Annual
Net amortization of premium (discount) on investments	`AccretionAmortizationOfDiscountsAndPremiumsInvestments`	$35.00M	USD	Annual
Net amortization of premium (discount) on investments	`AccretionAmortizationOfDiscountsAndPremiumsInvestments`	$31.00M	USD	Annual
Net amortization of premium (discount) on investments	`AccretionAmortizationOfDiscountsAndPremiumsInvestments`	$9.00M	USD	Annual
Provision (benefit) for deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$65.00M	USD	Annual
Provision (benefit) for deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$74.00M	USD	Annual
Provision (benefit) for deferred income taxes	`DeferredIncomeTaxExpenseBenefit`	$58.00M	USD	Annual
Net realized investment losses (gains)	`RealizedNoncashInvestmentsGainsLosses`	$18.00M	USD	Annual
Net realized investment losses (gains)	`RealizedNoncashInvestmentsGainsLosses`	$-32.00M	USD	Annual
Net realized investment losses (gains)	`RealizedNoncashInvestmentsGainsLosses`	$22.00M	USD	Annual
Change in premiums receivable, net of premiums and commissions payable	`IncreaseDecreaseInPremiumsReceivable`	$6.00M	USD	Annual
Change in premiums receivable, net of premiums and commissions payable	`IncreaseDecreaseInPremiumsReceivable`	$388.00M	USD	Annual
Change in premiums receivable, net of premiums and commissions payable	`IncreaseDecreaseInPremiumsReceivable`	$102.00M	USD	Annual
Change in ceded unearned premium reserve	`IncreaseDecreaseInPrepaidReinsurancePremiums`	$-20.00M	USD	Annual
Change in ceded unearned premium reserve	`IncreaseDecreaseInPrepaidReinsurancePremiums`	$-20.00M	USD	Annual
Change in ceded unearned premium reserve	`IncreaseDecreaseInPrepaidReinsurancePremiums`	$-58.00M	USD	Annual
Change in unearned premium reserve	`IncreaseDecreaseInUnearnedPremiums`	$39.00M	USD	Annual
Change in unearned premium reserve	`IncreaseDecreaseInUnearnedPremiums`	$-1.00M	USD	Annual
Change in unearned premium reserve	`IncreaseDecreaseInUnearnedPremiums`	$224.00M	USD	Annual
Change in loss and loss adjustment expense reserve, net	`IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve`	$-173.00M	USD	Annual
Change in loss and loss adjustment expense reserve, net	`IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve`	$-174.00M	USD	Annual
Change in loss and loss adjustment expense reserve, net	`IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve`	$-528.00M	USD	Annual
Change in credit derivative assets and liabilities, net	`IncreaseDecreaseInDerivativeAssetsAndLiabilities`	$22.00M	USD	Annual
Change in credit derivative assets and liabilities, net	`IncreaseDecreaseInDerivativeAssetsAndLiabilities`	$85.00M	USD	Annual
Change in credit derivative assets and liabilities, net	`IncreaseDecreaseInDerivativeAssetsAndLiabilities`	$62.00M	USD	Annual
Other	`IncreaseDecreaseInOtherOperatingCapitalNet`	$6.00M	USD	Annual
Other	`IncreaseDecreaseInOtherOperatingCapitalNet`	$26.00M	USD	Annual
Other	`IncreaseDecreaseInOtherOperatingCapitalNet`	$10.00M	USD	Annual
Purchases of securities	`PurchasesofSecuritiesofConsolidatedInvestmentVehicles`	$267.00M	USD	Annual
Purchases of securities	`PurchasesofSecuritiesofConsolidatedInvestmentVehicles`	$2.05B	USD	Annual
Purchases of securities	`PurchasesofSecuritiesofConsolidatedInvestmentVehicles`	-	USD	Annual
Sales of securities	`ProceedsFromSalesOfSecuritiesOfConsolidatedInvestmentVehicles`	$13.00M	USD	Annual
Sales of securities	`ProceedsFromSalesOfSecuritiesOfConsolidatedInvestmentVehicles`	$1.16B	USD	Annual
Sales of securities	`ProceedsFromSalesOfSecuritiesOfConsolidatedInvestmentVehicles`	-	USD	Annual
Maturities and paydowns of securities	`MaturitiesAndPaydownsOfSecuritiesOfConsolidatedInvestmentVehicles`	$71.00M	USD	Annual
Maturities and paydowns of securities	`MaturitiesAndPaydownsOfSecuritiesOfConsolidatedInvestmentVehicles`	-	USD	Annual
Maturities and paydowns of securities	`MaturitiesAndPaydownsOfSecuritiesOfConsolidatedInvestmentVehicles`	$5.00M	USD	Annual
Proceeds from (purchases of) money market funds	`ProceedsFromPaymentsForMoneyMarketFunds`	-	USD	Annual
Proceeds from (purchases of) money market funds	`ProceedsFromPaymentsForMoneyMarketFunds`	$108.00M	USD	Annual
Proceeds from (purchases of) money market funds	`ProceedsFromPaymentsForMoneyMarketFunds`	-	USD	Annual
Purchases to cover securities sold short	`PaymentsToCoverSecuritiesSoldShort`	$460.00M	USD	Annual
Purchases to cover securities sold short	`PaymentsToCoverSecuritiesSoldShort`	-	USD	Annual
Purchases to cover securities sold short	`PaymentsToCoverSecuritiesSoldShort`	-	USD	Annual
Proceeds from securities sold short	`ProceedsFromSecuritiesSoldShort`	$509.00M	USD	Annual
Proceeds from securities sold short	`ProceedsFromSecuritiesSoldShort`	-	USD	Annual
Proceeds from securities sold short	`ProceedsFromSecuritiesSoldShort`	-	USD	Annual
Other changes in investment vehicles	`IncreaseDecreaseinOtherOperatingActivitiesofConsolidatedInvestmentVehicles`	$-69.00M	USD	Annual
Other changes in investment vehicles	`IncreaseDecreaseinOtherOperatingActivitiesofConsolidatedInvestmentVehicles`	-	USD	Annual
Other changes in investment vehicles	`IncreaseDecreaseinOtherOperatingActivitiesofConsolidatedInvestmentVehicles`	$-3.00M	USD	Annual
Net cash flows provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$462.00M	USD	Annual
Net cash flows provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$-509.00M	USD	Annual
Net cash flows provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivities`	$-853.00M	USD	Annual
Purchases	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$873.00M	USD	Annual
Purchases	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$1.38B	USD	Annual
Purchases	`PaymentsToAcquireAvailableForSaleSecuritiesDebt`	$1.88B	USD	Annual
Sales	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	$1.18B	USD	Annual
Sales	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	$779.00M	USD	Annual
Sales	`ProceedsFromSaleOfAvailableForSaleSecuritiesDebt`	$1.80B	USD	Annual
Maturities and paydowns	`ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities`	$878.00M	USD	Annual
Maturities and paydowns	`ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities`	$781.00M	USD	Annual
Maturities and paydowns	`ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities`	$962.00M	USD	Annual
Purchases	`PaymentsToAcquireShortTermInvestments`	$229.00M	USD	Annual
Purchases	`PaymentsToAcquireShortTermInvestments`	$85.00M	USD	Annual
Purchases	`PaymentsToAcquireShortTermInvestments`	$243.00M	USD	Annual
Sales	`ProceedsFromSaleOfShortTermInvestments`	$23.00M	USD	Annual
Sales	`ProceedsFromSaleOfShortTermInvestments`	$2.00M	USD	Annual
Sales	`ProceedsFromSaleOfShortTermInvestments`	$5.00M	USD	Annual
Maturities and paydowns	`ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments`	$207.00M	USD	Annual
Maturities and paydowns	`ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments`	$73.00M	USD	Annual
Maturities and paydowns	`ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments`	$316.00M	USD	Annual
Net sales (purchases) of short-term investments with original maturities of less than three months	`ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess`	$-623.00M	USD	Annual
Net sales (purchases) of short-term investments with original maturities of less than three months	`ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess`	$430.00M	USD	Annual
Net sales (purchases) of short-term investments with original maturities of less than three months	`ProceedsFromRepaymentsOfShortTermDebtMaturingInThreeMonthsOrLess`	$-84.00M	USD	Annual
Paydowns on financial guaranty variable interest entities assets	`ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets`	$116.00M	USD	Annual
Paydowns on financial guaranty variable interest entities assets	`ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets`	$83.00M	USD	Annual
Paydowns on financial guaranty variable interest entities assets	`ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets`	$139.00M	USD	Annual
Sales of financial guaranty variable interest entities assets	`ProceedsfromSaleofFinancialGuarantyVariableInterestEntitiesAssets`	-	USD	Annual
Sales of financial guaranty variable interest entities assets	`ProceedsfromSaleofFinancialGuarantyVariableInterestEntitiesAssets`	$51.00M	USD	Annual
Sales of financial guaranty variable interest entities assets	`ProceedsfromSaleofFinancialGuarantyVariableInterestEntitiesAssets`	-	USD	Annual
Acquisitions, net of cash acquired (see Note 2)	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$145.00M	USD	Annual
Acquisitions, net of cash acquired (see Note 2)	`PaymentsToAcquireBusinessesNetOfCashAcquired`	-	USD	Annual
Acquisitions, net of cash acquired (see Note 2)	`PaymentsToAcquireBusinessesNetOfCashAcquired`	-	USD	Annual
Sales and return of capital of other invested assets	`ProceedsFromSaleofOtherInvestedAssets`	$38.00M	USD	Annual
Sales and return of capital of other invested assets	`ProceedsFromSaleofOtherInvestedAssets`	$36.00M	USD	Annual
Sales and return of capital of other invested assets	`ProceedsFromSaleofOtherInvestedAssets`	$23.00M	USD	Annual
Purchases of other invested assets	`PaymentsforPurchaseofOtherInvestedAssets`	$20.00M	USD	Annual
Purchases of other invested assets	`PaymentsforPurchaseofOtherInvestedAssets`	$88.00M	USD	Annual
Purchases of other invested assets	`PaymentsforPurchaseofOtherInvestedAssets`	$19.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$1.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$3.00M	USD	Annual
Other	`PaymentsForProceedsFromOtherInvestingActivities`	$-1.00M	USD	Annual
Net cash flows provided by (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$1.17B	USD	Annual
Net cash flows provided by (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$297.00M	USD	Annual
Net cash flows provided by (used in) investing activities	`NetCashProvidedByUsedInInvestingActivities`	$788.00M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$69.00M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$71.00M	USD	Annual
Dividends paid	`PaymentsOfDividendsCommonStock`	$74.00M	USD	Annual
Repurchases of common shares	`PaymentsForRepurchaseOfCommonStock`	$500.00M	USD	Annual
Repurchases of common shares	`PaymentsForRepurchaseOfCommonStock`	$446.00M	USD	Annual
Repurchases of common shares	`PaymentsForRepurchaseOfCommonStock`	$500.00M	USD	Annual
Net paydowns of financial guaranty variable interest entities liabilities	`PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities`	$181.00M	USD	Annual
Net paydowns of financial guaranty variable interest entities liabilities	`PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities`	$77.00M	USD	Annual
Net paydowns of financial guaranty variable interest entities liabilities	`PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities`	$116.00M	USD	Annual
Paydown of long-term debt	`RepaymentsOfLongTermDebt`	$101.00M	USD	Annual
Paydown of long-term debt	`RepaymentsOfLongTermDebt`	$22.00M	USD	Annual
Paydown of long-term debt	`RepaymentsOfLongTermDebt`	$4.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-7.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-10.00M	USD	Annual
Other	`ProceedsFromPaymentsForOtherFinancingActivities`	$-15.00M	USD	Annual
Proceeds from issuance of collateralized loan obligations	`ProceedsFromIssuanceOfFinancialServicesObligations`	-	USD	Annual
Proceeds from issuance of collateralized loan obligations	`ProceedsFromIssuanceOfFinancialServicesObligations`	$738.00M	USD	Annual
Proceeds from issuance of collateralized loan obligations	`ProceedsFromIssuanceOfFinancialServicesObligations`	$482.00M	USD	Annual
Proceeds from borrowing by warehouse	`ProceedsFromLinesOfCredit`	-	USD	Annual
Proceeds from borrowing by warehouse	`ProceedsFromLinesOfCredit`	-	USD	Annual
Proceeds from borrowing by warehouse	`ProceedsFromLinesOfCredit`	$234.00M	USD	Annual
Repayment of warehouse loans and equity	`RepaymentofWarehouseLoansandEquity`	$210.00M	USD	Annual
Repayment of warehouse loans and equity	`RepaymentofWarehouseLoansandEquity`	$306.00M	USD	Annual
Repayment of warehouse loans and equity	`RepaymentofWarehouseLoansandEquity`	-	USD	Annual
Contributions from noncontrolling interests to investment vehicles	`ContributionsFromNoncontrollingInterestsToInvestmentVehicles`	-	USD	Annual
Contributions from noncontrolling interests to investment vehicles	`ContributionsFromNoncontrollingInterestsToInvestmentVehicles`	$18.00M	USD	Annual
Contributions from noncontrolling interests to investment vehicles	`ContributionsFromNoncontrollingInterestsToInvestmentVehicles`	$88.00M	USD	Annual
Distributions to noncontrolling interests from investment vehicles	`DistributionsToRedeemableNoncontrollingInterestsFromInvestmentVehicles`	-	USD	Annual
Distributions to noncontrolling interests from investment vehicles	`DistributionsToRedeemableNoncontrollingInterestsFromInvestmentVehicles`	$4.00M	USD	Annual
Distributions to noncontrolling interests from investment vehicles	`DistributionsToRedeemableNoncontrollingInterestsFromInvestmentVehicles`	$43.00M	USD	Annual
Net cash flows provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$183.00M	USD	Annual
Net cash flows provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-584.00M	USD	Annual
Net cash flows provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-795.00M	USD	Annual
Effect of foreign exchange rate changes	`EffectOfExchangeRateOnCashAndCashEquivalents`	$3.00M	USD	Annual
Effect of foreign exchange rate changes	`EffectOfExchangeRateOnCashAndCashEquivalents`	$-3.00M	USD	Annual
Effect of foreign exchange rate changes	`EffectOfExchangeRateOnCashAndCashEquivalents`	$-4.00M	USD	Annual
Increase (decrease) in cash and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-40.00M	USD	Annual
Increase (decrease) in cash and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$79.00M	USD	Annual
Increase (decrease) in cash and restricted cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$115.00M	USD	Annual
Cash and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$144.00M	USD	Point-in-time
Cash and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$104.00M	USD	Point-in-time
Cash and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$183.00M	USD	Point-in-time
Cash and restricted cash at beginning of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$298.00M	USD	Point-in-time
Cash and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$144.00M	USD	Point-in-time
Cash and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$104.00M	USD	Point-in-time
Cash and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$183.00M	USD	Point-in-time
Cash and restricted cash at end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$298.00M	USD	Point-in-time
Income taxes	`IncomeTaxesPaidNet`	$-25.00M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$-4.00M	USD	Annual
Income taxes	`IncomeTaxesPaidNet`	$4.00M	USD	Annual
Interest on long-term debt	`InterestPaidNet`	$84.00M	USD	Annual
Interest on long-term debt	`InterestPaidNet`	$81.00M	USD	Annual
Interest on long-term debt	`InterestPaidNet`	$99.00M	USD	Annual
Purchases of fixed-maturity investments	`NoncashOrPartNoncashAcquisitionInvestmentsAcquired1`	$188.00M	USD	Annual
Purchases of fixed-maturity investments	`NoncashOrPartNoncashAcquisitionInvestmentsAcquired1`	$4.00M	USD	Annual
Purchases of fixed-maturity investments	`NoncashOrPartNoncashAcquisitionInvestmentsAcquired1`	$1.00M	USD	Annual
Sales of fixed-maturity investments	`NoncashorPartNoncashAcquisitionInvestmentsSold`	$44.00M	USD	Annual
Sales of fixed-maturity investments	`NoncashorPartNoncashAcquisitionInvestmentsSold`	-	USD	Annual
Sales of fixed-maturity investments	`NoncashorPartNoncashAcquisitionInvestmentsSold`	$1.00M	USD	Annual
Cash and restricted cash at the end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$144.00M	USD	Point-in-time
Cash and restricted cash at the end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$104.00M	USD	Point-in-time
Cash and restricted cash at the end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$183.00M	USD	Point-in-time
Cash and restricted cash at the end of period	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$298.00M	USD	Point-in-time

Stockholders Equity 31 line items

Line Item	Tag	Value	Unit	Period
Dividends (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.64	USD	Annual
Dividends (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.80	USD	Annual
Dividends (in dollars per share)	`CommonStockDividendsPerShareDeclared`	$0.72	USD	Annual
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.55B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.68B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.84B	USD	Point-in-time
Beginning balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.64B	USD	Point-in-time
Net income	`NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest`	$369.00M	USD	Annual
Net income	`NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest`	$402.00M	USD	Annual
Net income	`NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest`	$521.00M	USD	Annual
Dividends	`DividendsCommonStockCash`	$71.00M	USD	Annual
Dividends	`DividendsCommonStockCash`	$74.00M	USD	Annual
Dividends	`DividendsCommonStockCash`	$69.00M	USD	Annual
Common shares repurchases	`StockRepurchasedAndRetiredDuringPeriodValue`	$446.00M	USD	Annual
Common shares repurchases	`StockRepurchasedAndRetiredDuringPeriodValue`	$500.00M	USD	Annual
Common shares repurchases	`StockRepurchasedAndRetiredDuringPeriodValue`	$500.00M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueSharebasedCompensationandOther`	$13.00M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueSharebasedCompensationandOther`	$7.00M	USD	Annual
Share-based compensation	`StockIssuedDuringPeriodValueSharebasedCompensationandOther`	$16.00M	USD	Annual
Reallocation of ownership interests	`NonRedeemableNoncontrollingInterestEquityOtherReallocationofOwnershipInterests`	$-10.00M	USD	Annual
Contributions	`NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance`	$63.00M	USD	Annual
Contributions	`NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance`	$6.00M	USD	Annual
Distributions	`MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders`	$45.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$249.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$-247.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent`	$156.00M	USD	Annual
Other	`StockholdersEquityOther`	$15.00M	USD	Annual
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.55B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.68B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.84B	USD	Point-in-time
Ending balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$6.64B	USD	Point-in-time

Comprehensive Income 39 line items

Line Item	Tag	Value	Unit	Period
Investments with no credit impairment, tax	`OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax`	$20.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$368.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$401.00M	USD	Annual
Investments with no credit impairment, tax	`OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax`	$46.00M	USD	Annual
Net income (loss)	`ProfitLoss`	$521.00M	USD	Annual
Investments with no credit impairment, tax	`OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax`	$-32.00M	USD	Annual
Investments with credit impairment, tax	`OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax`	$-14.00M	USD	Annual
Investments with credit impairment, tax	`OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax`	$-4.00M	USD	Annual
Investments with credit impairment, tax	`OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax`	$-8.00M	USD	Annual
Investments with no credit impairment recognized in the statement of operations, net of tax provision (benefit) of $20, $46 and $(32)	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesWithNoOtherThanTemporaryImpairmentArisingDuringPeriodNetOfTax`	$163.00M	USD	Annual
Other, tax	`OtherComprehensiveIncomeLossOtherTaxPortionAttributableToParent`	-	USD	Annual
Investments with no credit impairment recognized in the statement of operations, net of tax provision (benefit) of $20, $46 and $(32)	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesWithNoOtherThanTemporaryImpairmentArisingDuringPeriodNetOfTax`	$293.00M	USD	Annual
Other, tax	`OtherComprehensiveIncomeLossOtherTaxPortionAttributableToParent`	$-2.00M	USD	Annual
Other, tax	`OtherComprehensiveIncomeLossOtherTaxPortionAttributableToParent`	-	USD	Annual
Investments with no credit impairment recognized in the statement of operations, net of tax provision (benefit) of $20, $46 and $(32)	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesWithNoOtherThanTemporaryImpairmentArisingDuringPeriodNetOfTax`	$-215.00M	USD	Annual
Investments with credit impairment recognized in the statement of operations, net of tax provision (benefit) of $(4), $(14) and $(8)	`OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities`	$26.00M	USD	Annual
Investments with credit impairment recognized in the statement of operations, net of tax provision (benefit) of $(4), $(14) and $(8)	`OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities`	$16.00M	USD	Annual
Investments with credit impairment recognized in the statement of operations, net of tax provision (benefit) of $(4), $(14) and $(8)	`OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParentAvailableforsaleSecurities`	$46.00M	USD	Annual
Change in net unrealized gains (losses) on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$147.00M	USD	Annual
Change in net unrealized gains (losses) on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$247.00M	USD	Annual
Change in net unrealized gains (losses) on investments	`OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax`	$-241.00M	USD	Annual
Change in net unrealized gains (losses) on financial guaranty variable interest entities' liabilities with recourse, net of tax	`OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment`	$7.00M	USD	Annual
Change in net unrealized gains (losses) on financial guaranty variable interest entities' liabilities with recourse, net of tax	`OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment`	$4.00M	USD	Annual
Change in net unrealized gains (losses) on financial guaranty variable interest entities' liabilities with recourse, net of tax	`OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment`	$2.00M	USD	Annual
Other, net of tax provision (benefit) of $0, $0 and $(2)	`OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent`	$-8.00M	USD	Annual
Other, net of tax provision (benefit) of $0, $0 and $(2)	`OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent`	$-2.00M	USD	Annual
Other, net of tax provision (benefit) of $0, $0 and $(2)	`OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent`	$2.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$-247.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$156.00M	USD	Annual
Other comprehensive income (loss)	`OtherComprehensiveIncomeLossNetOfTax`	$249.00M	USD	Annual
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$524.00M	USD	Annual
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$274.00M	USD	Annual
Comprehensive income (loss)	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$650.00M	USD	Annual
Less: Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-1.00M	USD	Annual
Less: Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$6.00M	USD	Annual
Less: Comprehensive income (loss) attributable to noncontrolling interests	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	-	USD	Annual
Comprehensive income (loss) attributable to Assured Guaranty Ltd.	`ComprehensiveIncomeNetOfTax`	$651.00M	USD	Annual
Comprehensive income (loss) attributable to Assured Guaranty Ltd.	`ComprehensiveIncomeNetOfTax`	$518.00M	USD	Annual
Comprehensive income (loss) attributable to Assured Guaranty Ltd.	`ComprehensiveIncomeNetOfTax`	$274.00M	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.