$AGO
ASSURED GUARANTY LTD Stock $ago

$ago Overview Financials Valuation SEC Filings Company Website

2021 Q4 Form 10-Q Financial Statement

#000127381321000062 Filed on November 05, 2021

Income Statement

Concept	2021 Q4	2021 Q3	2020 Q3
Revenue	$266.0M	$212.0M	$268.0M
YoY Change	-8.9%	-20.9%	30.1%
Cost Of Revenue		-$68.00M	$73.00M
YoY Change		-193.15%	143.33%
Gross Profit		$280.0M	$195.0M
YoY Change		43.59%	10.8%
Gross Profit Margin		132.08%	72.76%
Selling, General & Admin	$57.00M	$59.00M	$57.00M
YoY Change	-6.56%	3.51%
% of Gross Profit		21.07%	29.23%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization		$3.000M	$4.000M
YoY Change		-25.0%	33.33%
% of Gross Profit		1.07%	2.05%
Operating Expenses	-$84.00M	$12.00M	$158.0M
YoY Change	-146.93%	-92.41%	61.22%
Operating Profit		$268.0M	$37.00M
YoY Change		624.32%	-52.56%
Interest Expense	-$10.00M	$23.00M	$21.00M
YoY Change	-115.87%	9.52%	-4.55%
% of Operating Profit		8.58%	56.76%
Other Income/Expense, Net
YoY Change
Pretax Income	$332.0M	$5.000M	$79.00M
YoY Change	90.8%	-93.67%	-8.14%
Income Tax	$50.00M	-$15.00M	-$10.00M
% Of Pretax Income	15.06%	-300.0%	-12.66%
Net Earnings	$263.0M	$17.00M	$86.00M
YoY Change	77.7%	-80.23%	24.64%
Net Earnings / Revenue	98.87%	8.02%	32.09%
Basic Earnings Per Share		$0.22	$1.03
Diluted Earnings Per Share	$3.752M	$0.22	$1.02
COMMON SHARES
Basic Shares Outstanding	69.85M shares	72.70M shares	83.20M shares
Diluted Shares Outstanding		73.60M shares	83.80M shares

Balance Sheet

Concept	2021 Q4	2021 Q3	2020 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$342.0M	$240.0M	$406.0M
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	$117.0M
YoY Change	0.0%
Intangibles
YoY Change
Long-Term Investments	$14.88B	$13.99B	$11.07B
YoY Change	26.62%	26.41%	5.63%
Other Assets	$2.000M	$1.000M
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$18.21B	$17.61B	$14.70B
YoY Change	18.74%	19.86%	9.93%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities
YoY Change
LONG-TERM LIABILITIES
Long-Term Debt	$1.673B	$1.671B	$1.223B
YoY Change	36.68%	36.63%	-0.89%
Other Long-Term Liabilities	$5.450B	$4.850B	$2.111B
YoY Change	111.08%	129.75%	101.05%
Total Long-Term Liabilities	$7.123B	$6.521B	$3.334B
YoY Change	87.15%	95.59%	45.97%
TOTAL LIABILITIES
Total Short-Term Liabilities
Total Long-Term Liabilities	$7.123B	$6.521B	$3.334B
Total Liabilities	$11.71B	$11.22B	$8.078B
YoY Change	35.68%	38.87%	20.3%
SHAREHOLDERS EQUITY
Retained Earnings	$5.990B	$5.924B	$6.143B
YoY Change	-2.49%	-3.57%	-2.97%
Common Stock	$1.000M	$1.000M	$1.000M
YoY Change	0.0%	0.0%	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$6.292B	$6.300B	$6.549B
YoY Change
Total Liabilities & Shareholders Equity	$18.21B	$17.61B	$14.70B
YoY Change	18.74%	19.86%	9.93%

Cashflow Statement

Concept	2021 Q4	2021 Q3	2020 Q3
OPERATING ACTIVITIES
Net Income	$263.0M	$17.00M	$86.00M
YoY Change	77.7%	-80.23%	24.64%
Depreciation, Depletion And Amortization		$3.000M	$4.000M
YoY Change		-25.0%	33.33%
Cash From Operating Activities	-$145.0M	-$843.0M	-$219.0M
YoY Change	-23.28%	284.93%	31.14%
INVESTING ACTIVITIES
Capital Expenditures
YoY Change
Acquisitions
YoY Change
Other Investing Activities	-$146.0M	$425.0M	$173.0M
YoY Change	23.73%	145.66%	-60.59%
Cash From Investing Activities	-$146.0M	$425.0M	$173.0M
YoY Change	23.73%	145.66%	-60.59%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	394.0M	363.0M	-21.00M
YoY Change	102.05%	-1828.57%	-91.06%
NET CHANGE
Cash From Operating Activities	-145.0M	-843.0M	-219.0M
Cash From Investing Activities	-146.0M	425.0M	173.0M
Cash From Financing Activities	394.0M	363.0M	-21.00M
Net Change In Cash	103.0M	-55.00M	-67.00M
YoY Change	-191.96%	-17.91%	-281.08%
FREE CASH FLOW
Cash From Operating Activities	-$145.0M	-$843.0M	-$219.0M
Capital Expenditures
Free Cash Flow
YoY Change

Facts In Submission

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	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2021
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
	dei	Document Type DocumentType	10-Q
	dei	Document Quarterly Report DocumentQuarterlyReport	true
	dei	Document Period End Date DocumentPeriodEndDate	2021-09-30
	dei	Document Transition Report DocumentTransitionReport	false
	dei	Entity File Number EntityFileNumber	001-32141
	dei	Entity Registrant Name EntityRegistrantName	ASSURED GUARANTY LTD.
	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	D0
	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	98-0429991
	dei	Entity Address Address Line1 EntityAddressAddressLine1	30 Woodbourne Avenue
	dei	Entity Address City Or Town EntityAddressCityOrTown	Hamilton
	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	HM 08
	dei	City Area Code CityAreaCode	441
	dei	Entity Address Country EntityAddressCountry	BM
	dei	Local Phone Number LocalPhoneNumber	279-5700
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Interactive Data Current EntityInteractiveDataCurrent	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
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	us-gaap	Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments	236000000	USD
CY2021Q3	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	23000000	USD
CY2020Q3	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	7000000	USD
	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	66000000	USD
	us-gaap	Equity Securities Fv Ni Realized Gain Loss EquitySecuritiesFvNiRealizedGainLoss	3000000	USD
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	79000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	145000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	239000000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-15000000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20000000	USD
CY2021Q3	us-gaap	Profit Loss ProfitLoss	20000000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	89000000	USD
	us-gaap	Profit Loss ProfitLoss	137000000	USD
	us-gaap	Profit Loss ProfitLoss	219000000	USD
CY2021Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3000000	USD
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	11000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	17000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	86000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	126000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	214000000	USD
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.03
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.67
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.66
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.43
CY2021Q3	us-gaap	Profit Loss ProfitLoss	20000000	USD
CY2020Q3	us-gaap	Profit Loss ProfitLoss	89000000	USD
	us-gaap	Profit Loss ProfitLoss	137000000	USD
	us-gaap	Profit Loss ProfitLoss	219000000	USD
CY2021Q3	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax	-8000000	USD
CY2020Q3	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax	7000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax	-18000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentTax	11000000	USD
CY2021Q3	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax	-66000000	USD
CY2020Q3	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax	67000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax	-134000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities Without Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithoutCreditImpairmentNetofTax	80000000	USD
CY2021Q3	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax	-2000000	USD
CY2020Q3	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax	2000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax	3000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentTax	-5000000	USD
CY2021Q3	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax	-6000000	USD
CY2020Q3	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax	8000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax	12000000	USD
	ago	Other Comprehensive Income Loss Availableforsale Securities With Credit Impairment Netof Tax OtherComprehensiveIncomeLossAvailableforsaleSecuritiesWithCreditImpairmentNetofTax	-19000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-72000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	75000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-122000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	61000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	2000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	-4000000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	-1000000	USD
	us-gaap	Other Comprehensive Income Loss Financial Liability Fair Value Option After Tax And Reclassification Adjustment OtherComprehensiveIncomeLossFinancialLiabilityFairValueOptionAfterTaxAndReclassificationAdjustment	1000000	USD
CY2021Q3	ago	Other Comprehensive Income Loss Other Netof Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent	-1000000	USD
CY2020Q3	ago	Other Comprehensive Income Loss Other Netof Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent	0	USD
	ago	Other Comprehensive Income Loss Other Netof Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent	-1000000	USD
	ago	Other Comprehensive Income Loss Other Netof Tax Portion Attributable To Parent OtherComprehensiveIncomeLossOtherNetofTaxPortionAttributableToParent	0	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-71000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	71000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-124000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	62000000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-51000000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	160000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	13000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	281000000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	3000000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	3000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	11000000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	5000000	USD
CY2021Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-54000000	USD
CY2020Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	157000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	2000000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	276000000	USD
CY2021Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6552000000	USD
CY2021Q3	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	20000000	USD
CY2021Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.22
CY2021Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	16000000	USD
CY2021Q3	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	25000000	USD
CY2021Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	140000000	USD
CY2021Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	7000000	USD
CY2021Q3	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	2000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-71000000	USD
CY2021Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6375000000	USD
CY2020Q2	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6489000000	USD
CY2020Q3	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	88000000	USD
CY2020Q3	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.20
CY2020Q3	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	17000000	USD
CY2020Q3	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	3000000	USD
CY2020Q3	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	40000000	USD
CY2020Q3	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	5000000	USD
CY2020Q3	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	3000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	71000000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6596000000	USD
CY2020Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6684000000	USD
	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	137000000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.66
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	50000000	USD
	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	34000000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	305000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	10000000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	11000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	-124000000	USD
CY2021Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6375000000	USD
CY2019Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6645000000	USD
	us-gaap	Net Income Loss Including Portion Attributable To Nonredeemable Noncontrolling Interest NetIncomeLossIncludingPortionAttributableToNonredeemableNoncontrollingInterest	220000000	USD
	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	0.60
	us-gaap	Dividends Common Stock Cash DividendsCommonStockCash	53000000	USD
	ago	Non Redeemable Noncontrolling Interest Equity Other Reallocationof Ownership Interests NonRedeemableNoncontrollingInterestEquityOtherReallocationofOwnershipInterests	-10000000	USD
	us-gaap	Noncontrolling Interest Increase From Subsidiary Equity Issuance NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance	44000000	USD
	us-gaap	Stock Repurchased And Retired During Period Value StockRepurchasedAndRetiredDuringPeriodValue	320000000	USD
	us-gaap	Stock Issued During Period Value Share Based Compensation StockIssuedDuringPeriodValueShareBasedCompensation	7000000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	19000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	62000000	USD
CY2020Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	6596000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-1792000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	-664000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	1025000000	USD
	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	856000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	222000000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	627000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	757000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	642000000	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	0	USD
	us-gaap	Payments To Acquire Short Term Investments PaymentsToAcquireShortTermInvestments	238000000	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	0	USD
	us-gaap	Proceeds From Sale Of Short Term Investments ProceedsFromSaleOfShortTermInvestments	41000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	32000000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Shortterm Investments ProceedsFromMaturitiesPrepaymentsAndCallsOfShorttermInvestments	198000000	USD
	ago	Paymentsfor Proceedsfrom Shortterm Investmentswith Maturitiesof Less Than Three Months PaymentsforProceedsfromShorttermInvestmentswithMaturitiesofLessThanThreeMonths	-125000000	USD
	ago	Paymentsfor Proceedsfrom Shortterm Investmentswith Maturitiesof Less Than Three Months PaymentsforProceedsfromShorttermInvestmentswithMaturitiesofLessThanThreeMonths	-415000000	USD
	ago	Proceedsfrom Paydownson Financial Guaranty Variable Interest Entities Assets ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets	45000000	USD
	ago	Proceedsfrom Paydownson Financial Guaranty Variable Interest Entities Assets ProceedsfromPaydownsonFinancialGuarantyVariableInterestEntitiesAssets	67000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	44000000	USD
	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	12000000	USD
	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	61000000	USD
	us-gaap	Proceeds From Sale Of Other Assets Investing Activities ProceedsFromSaleOfOtherAssetsInvestingActivities	21000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	4000000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	-1000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	169000000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	906000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	51000000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	53000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	305000000	USD
	ago	Contributions From Noncontrolling Interests To Investment Vehicles ContributionsFromNoncontrollingInterestsToInvestmentVehicles	33000000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	320000000	USD
	ago	Paydown Of Financial Guaranty Variable Interest Entities Liabilities PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities	38000000	USD
	ago	Paydown Of Financial Guaranty Variable Interest Entities Liabilities PaydownOfFinancialGuarantyVariableInterestEntitiesLiabilities	63000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	889000000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	0	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	620000000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	22000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	7000000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-12000000	USD
	ago	Proceeds From Issuance Of Collateralized Loan Obligations ProceedsFromIssuanceOfCollateralizedLoanObligations	2079000000	USD
	ago	Proceeds From Issuance Of Collateralized Loan Obligations ProceedsFromIssuanceOfCollateralizedLoanObligations	361000000	USD
	ago	Repayments Of Collateralized Loan Obligations RepaymentsOfCollateralizedLoanObligations	365000000	USD
	ago	Repayments Of Collateralized Loan Obligations RepaymentsOfCollateralizedLoanObligations	0	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	1008000000	USD
	us-gaap	Proceeds From Lines Of Credit ProceedsFromLinesOfCredit	47000000	USD
	ago	Repaymentof Warehouse Loansand Equity RepaymentofWarehouseLoansandEquity	1061000000	USD
	ago	Repaymentof Warehouse Loansand Equity RepaymentofWarehouseLoansandEquity	0	USD
	ago	Contributions From Noncontrolling Interests To Investment Vehicles ContributionsFromNoncontrollingInterestsToInvestmentVehicles	69000000	USD
	ago	Distributions To Noncontrolling Interests From Investment Vehicles DistributionsToNoncontrollingInterestsFromInvestmentVehicles	10000000	USD
	ago	Distributions To Noncontrolling Interests From Investment Vehicles DistributionsToNoncontrollingInterestsFromInvestmentVehicles	19000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	1566000000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-12000000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-1000000	USD
	us-gaap	Effect Of Exchange Rate On Cash And Cash Equivalents EffectOfExchangeRateOnCashAndCashEquivalents	-7000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-58000000	USD
	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	223000000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	298000000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	183000000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	240000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	406000000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1000000	USD
	us-gaap	Income Taxes Paid IncomeTaxesPaid	1000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	50000000	USD
	us-gaap	Interest Paid Net InterestPaidNet	49000000	USD
CY2021Q3	us-gaap	Cash Cash	101000000	USD
CY2020Q3	us-gaap	Cash Cash	223000000	USD
CY2021Q3	us-gaap	Restricted Cash RestrictedCash	1000000	USD
CY2020Q3	us-gaap	Restricted Cash RestrictedCash	1000000	USD
CY2021Q3	ago	Cashof Consolidated Investment Vehicles CashofConsolidatedInvestmentVehicles	138000000	USD
CY2020Q3	ago	Cashof Consolidated Investment Vehicles CashofConsolidatedInvestmentVehicles	182000000	USD
CY2021Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	240000000	USD
CY2020Q3	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	406000000	USD
CY2021Q3	ago	Holding Companieswith Outstanding Public Debt Number HoldingCompanieswithOutstandingPublicDebtNumber	2	Company
CY2021Q3	ago	Revenue Including Adjustments RevenueIncludingAdjustments	228000000	USD
CY2021Q3	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	228000000	USD
CY2021Q3	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	228000000	USD
CY2021Q3	ago	Income Lossfrom Continuing Operationsbefore Equity Method Investments Income Taxes Noncontrolling Interest Segment Total IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsIncomeTaxesNoncontrollingInterestSegmentTotal	0	USD
CY2021Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	23000000	USD
CY2021Q3	ago	Adjusted Income Lossfrom Continuing Operationsbefore Income Taxes Noncontrolling Interest Segment Total AdjustedIncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestSegmentTotal	23000000	USD
CY2021Q3	ago	Segment Income Tax Expense Benefit SegmentIncomeTaxExpenseBenefit	-14000000	USD
CY2021Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3000000	USD
CY2021Q3	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	34000000	USD
CY2020Q3	ago	Revenue Including Adjustments RevenueIncludingAdjustments	232000000	USD
CY2020Q3	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	232000000	USD
CY2020Q3	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	200000000	USD
CY2020Q3	ago	Income Lossfrom Continuing Operationsbefore Equity Method Investments Income Taxes Noncontrolling Interest Segment Total IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsIncomeTaxesNoncontrollingInterestSegmentTotal	32000000	USD
CY2020Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	7000000	USD
CY2020Q3	ago	Adjusted Income Lossfrom Continuing Operationsbefore Income Taxes Noncontrolling Interest Segment Total AdjustedIncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestSegmentTotal	39000000	USD
CY2020Q3	ago	Segment Income Tax Expense Benefit SegmentIncomeTaxExpenseBenefit	-12000000	USD
CY2020Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3000000	USD
CY2020Q3	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	48000000	USD
	ago	Revenue Including Adjustments RevenueIncludingAdjustments	678000000	USD
	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	678000000	USD
	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	513000000	USD
	ago	Income Lossfrom Continuing Operationsbefore Equity Method Investments Income Taxes Noncontrolling Interest Segment Total IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsIncomeTaxesNoncontrollingInterestSegmentTotal	165000000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	66000000	USD
	ago	Adjusted Income Lossfrom Continuing Operationsbefore Income Taxes Noncontrolling Interest Segment Total AdjustedIncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestSegmentTotal	231000000	USD
	ago	Segment Income Tax Expense Benefit SegmentIncomeTaxExpenseBenefit	23000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	11000000	USD
	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	197000000	USD
	ago	Revenue Including Adjustments RevenueIncludingAdjustments	716000000	USD
	ago	Segment Revenue Including Adjustments SegmentRevenueIncludingAdjustments	716000000	USD
	ago	Segment Benefits Losses And Expenses SegmentBenefitsLossesAndExpenses	496000000	USD
	ago	Income Lossfrom Continuing Operationsbefore Equity Method Investments Income Taxes Noncontrolling Interest Segment Total IncomeLossfromContinuingOperationsbeforeEquityMethodInvestmentsIncomeTaxesNoncontrollingInterestSegmentTotal	220000000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3000000	USD
	ago	Adjusted Income Lossfrom Continuing Operationsbefore Income Taxes Noncontrolling Interest Segment Total AdjustedIncomeLossfromContinuingOperationsbeforeIncomeTaxesNoncontrollingInterestSegmentTotal	223000000	USD
	ago	Segment Income Tax Expense Benefit SegmentIncomeTaxExpenseBenefit	18000000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5000000	USD
	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	200000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	17000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	86000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	126000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	214000000	USD
CY2021Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	3000000	USD
CY2020Q3	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	13000000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	4000000	USD
	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	12000000	USD
CY2021Q3	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	9000000	USD
CY2020Q3	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-3000000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	-41000000	USD
	us-gaap	Unrealized Gain Loss On Derivatives And Commodity Contracts UnrealizedGainLossOnDerivativesAndCommodityContracts	6000000	USD
CY2021Q3	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	-3000000	USD
CY2020Q3	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	-10000000	USD
	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	-28000000	USD
	ago	Fair Value Gain Loss On Committed Capital Securities FairValueGainLossOnCommittedCapitalSecurities	13000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation Segment Total FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslationSegmentTotal	-27000000	USD
CY2020Q3	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation Segment Total FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslationSegmentTotal	40000000	USD
	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation Segment Total FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslationSegmentTotal	-21000000	USD
	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation Segment Total FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslationSegmentTotal	-15000000	USD
CY2021Q3	ago	Adjustmentsto Operating Income Pre Tax AdjustmentstoOperatingIncomePreTax	-18000000	USD
CY2020Q3	ago	Adjustmentsto Operating Income Pre Tax AdjustmentstoOperatingIncomePreTax	40000000	USD
	ago	Adjustmentsto Operating Income Pre Tax AdjustmentstoOperatingIncomePreTax	-86000000	USD
	ago	Adjustmentsto Operating Income Pre Tax AdjustmentstoOperatingIncomePreTax	16000000	USD
CY2021Q3	ago	Adjustmentsto Operating Income Tax AdjustmentstoOperatingIncomeTax	-1000000	USD
CY2020Q3	ago	Adjustmentsto Operating Income Tax AdjustmentstoOperatingIncomeTax	2000000	USD
	ago	Adjustmentsto Operating Income Tax AdjustmentstoOperatingIncomeTax	-15000000	USD
	ago	Adjustmentsto Operating Income Tax AdjustmentstoOperatingIncomeTax	2000000	USD
CY2021Q3	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	34000000	USD
CY2020Q3	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	48000000	USD
	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	197000000	USD
	ago	Adjusted Income Loss Attributableto Parent AdjustedIncomeLossAttributabletoParent	200000000	USD
CY2021Q3	ago	Insured Financial Obligations Loss Mitigation Securities InsuredFinancialObligationsLossMitigationSecurities	1300000000	USD
CY2020Q4	ago	Insured Financial Obligations Loss Mitigation Securities InsuredFinancialObligationsLossMitigationSecurities	1400000000	USD
CY2021Q3	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Gross InsuredFinancialObligationsInsuredContractualPaymentsOutstandingGross	366788000000	USD
CY2020Q4	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Gross InsuredFinancialObligationsInsuredContractualPaymentsOutstandingGross	366692000000	USD
CY2021Q3	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Net InsuredFinancialObligationsInsuredContractualPaymentsOutstandingNet	366373000000	USD
CY2020Q4	ago	Insured Financial Obligations Insured Contractual Payments Outstanding Net InsuredFinancialObligationsInsuredContractualPaymentsOutstandingNet	366233000000	USD
CY2021Q3	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	235668000000	USD
CY2021Q3	ago	Insured Financial Obligations Outstanding Principle Amount Percentage InsuredFinancialObligationsOutstandingPrincipleAmountPercentage	1.000
CY2020Q4	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	234153000000	USD
CY2021Q3	ago	Expected Losson Credit Derivativeto Be Paid Recovered Including Representationand Warranty Liability Benefit ExpectedLossonCreditDerivativetoBePaidRecoveredIncludingRepresentationandWarrantyLiabilityBenefit	6000000	USD
CY2020Q4	ago	Expected Losson Credit Derivativeto Be Paid Recovered Including Representationand Warranty Liability Benefit ExpectedLossonCreditDerivativetoBePaidRecoveredIncludingRepresentationandWarrantyLiabilityBenefit	-1000000	USD
CY2020Q4	ago	Insured Financial Obligations Outstanding Principle Amount Percentage InsuredFinancialObligationsOutstandingPrincipleAmountPercentage	1.000
CY2021Q3	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	235668000000	USD
CY2020Q4	ago	Insured Financial Obligations Outstanding Principal Amount Net InsuredFinancialObligationsOutstandingPrincipalAmountNet	234153000000	USD
CY2021Q3	ago	Specialty Insuranceand Reinsurance Gross Par SpecialtyInsuranceandReinsuranceGrossPar	1577000000	USD
CY2020Q4	ago	Specialty Insuranceand Reinsurance Gross Par SpecialtyInsuranceandReinsuranceGrossPar	1484000000	USD
CY2021Q3	ago	Specialty Insuranceand Reinsurance Net Par SpecialtyInsuranceandReinsuranceNetPar	1038000000	USD
CY2020Q4	ago	Specialty Insuranceand Reinsurance Net Par SpecialtyInsuranceandReinsuranceNetPar	928000000	USD
	ago	Insured Financial Obligations Insured Credit Performanceof Guaranteed Obligations Term InsuredFinancialObligationsInsuredCreditPerformanceofGuaranteedObligationsTerm	P30Y
	ago	Insured Financial Obligations Claim Liability Weighted Average Risk Free Discount Rate InsuredFinancialObligationsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0078
CY2020	ago	Insured Financial Obligations Claim Liability Weighted Average Risk Free Discount Rate InsuredFinancialObligationsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0060
CY2021Q2	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	466000000	USD
CY2020Q2	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	735000000	USD
CY2020Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	529000000	USD
CY2019Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	737000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Accretion Of Discount GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount	2000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Accretion Of Discount GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount	1000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Accretion Of Discount GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount	5000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Accretion Of Discount GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesAccretionOfDiscount	7000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Discount Rates GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates	-1000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Discount Rates GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates	-2000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Discount Rates GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates	-34000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Discount Rates GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInDiscountRates	30000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Timing And Assumptions GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions	-95000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Timing And Assumptions GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions	71000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Timing And Assumptions GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions	-72000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties Changes In Timing And Assumptions GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarrantiesChangesInTimingAndAssumptions	64000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-94000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	70000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-101000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	101000000	USD
CY2021Q3	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	173000000	USD
CY2020Q3	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	334000000	USD
	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	229000000	USD
	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	367000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	199000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	471000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	199000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	471000000	USD
CY2021Q2	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	466000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-94000000	USD
CY2021Q3	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	173000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	199000000	USD
CY2020Q2	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	735000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	199000000	USD
CY2020Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	529000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-94000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	70000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-101000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	101000000	USD
CY2021Q3	ago	Guarantor Obligations Projected Loss Assumptions Increase In Expected Recoveries GuarantorObligationsProjectedLossAssumptionsIncreaseInExpectedRecoveries	56000000	USD
	ago	Additional Loss Recovery Assumption Recovery Period AdditionalLossRecoveryAssumptionRecoveryPeriod	P5Y
CY2021Q3	ago	Loss Recovery Assumption Additional Increasein Recovery Projection Percent LossRecoveryAssumptionAdditionalIncreaseinRecoveryProjectionPercent	0.40
CY2021Q3	ago	Loss Recovery Assumption Additional Increasein Recovery Projection Economic Benefit LossRecoveryAssumptionAdditionalIncreaseinRecoveryProjectionEconomicBenefit	45000000	USD
CY2021Q3	ago	Loss Recovery Assumption Additional Decreasein Recovery Projection Percent LossRecoveryAssumptionAdditionalDecreaseinRecoveryProjectionPercent	0.20
CY2021Q3	ago	Loss Recovery Assumption Additional Decreasein Recovery Projection Economic Loss LossRecoveryAssumptionAdditionalDecreaseinRecoveryProjectionEconomicLoss	45000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Scheduled Net Earned Premiums FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums	81000000	USD
CY2020Q3	ago	Financial Guarantee Insurance Contracts Scheduled Net Earned Premiums FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums	85000000	USD
	ago	Financial Guarantee Insurance Contracts Scheduled Net Earned Premiums FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums	242000000	USD
	ago	Financial Guarantee Insurance Contracts Scheduled Net Earned Premiums FinancialGuaranteeInsuranceContractsScheduledNetEarnedPremiums	250000000	USD
CY2021Q3	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	8000000	USD
CY2020Q3	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	17000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	39000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Accelerated Premium Revenue Amount FinancialGuaranteeInsuranceContractsAcceleratedPremiumRevenueAmount	64000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Net Premiums Receivable Adjustment Accretionof Discounton Net Premium Receivable FinancialGuaranteeInsuranceContractsNetPremiumsReceivableAdjustmentAccretionofDiscountonNetPremiumReceivable	-13000000	USD
CY2020Q3	ago	Financial Guarantee Insurance Contracts Net Premiums Receivable Adjustment Accretionof Discounton Net Premium Receivable FinancialGuaranteeInsuranceContractsNetPremiumsReceivableAdjustmentAccretionofDiscountonNetPremiumReceivable	-5000000	USD
	ago	Financial Guarantee Insurance Contracts Net Premiums Receivable Adjustment Accretionof Discounton Net Premium Receivable FinancialGuaranteeInsuranceContractsNetPremiumsReceivableAdjustmentAccretionofDiscountonNetPremiumReceivable	-24000000	USD
	ago	Financial Guarantee Insurance Contracts Net Premiums Receivable Adjustment Accretionof Discounton Net Premium Receivable FinancialGuaranteeInsuranceContractsNetPremiumsReceivableAdjustmentAccretionofDiscountonNetPremiumReceivable	-15000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Premiums Earned Net FinancialGuaranteeInsuranceContractsPremiumsEarnedNet	102000000	USD
CY2020Q3	ago	Financial Guarantee Insurance Contracts Premiums Earned Net FinancialGuaranteeInsuranceContractsPremiumsEarnedNet	107000000	USD
	ago	Financial Guarantee Insurance Contracts Premiums Earned Net FinancialGuaranteeInsuranceContractsPremiumsEarnedNet	305000000	USD
	ago	Financial Guarantee Insurance Contracts Premiums Earned Net FinancialGuaranteeInsuranceContractsPremiumsEarnedNet	329000000	USD
CY2021Q3	ago	Premiums Earned Net Specialty Insuranceand Reinsurance PremiumsEarnedNetSpecialtyInsuranceandReinsurance	0	USD
CY2020Q3	ago	Premiums Earned Net Specialty Insuranceand Reinsurance PremiumsEarnedNetSpecialtyInsuranceandReinsurance	0	USD
	ago	Premiums Earned Net Specialty Insuranceand Reinsurance PremiumsEarnedNetSpecialtyInsuranceandReinsurance	2000000	USD
	ago	Premiums Earned Net Specialty Insuranceand Reinsurance PremiumsEarnedNetSpecialtyInsuranceandReinsurance	2000000	USD
CY2021Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	102000000	USD
CY2020Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	107000000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	307000000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	331000000	USD
CY2020Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1372000000	USD
CY2019Q4	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1286000000	USD
CY2020Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	1000000	USD
CY2019Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	2000000	USD
CY2020Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	1371000000	USD
CY2019Q4	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	1284000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable New Business Written FinancialGuaranteeInsuranceContractsPremiumReceivableNewBusinessWritten	270000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable New Business Written FinancialGuaranteeInsuranceContractsPremiumReceivableNewBusinessWritten	342000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Proceeds From Premiums Received FinancialGuaranteeInsuranceContractsPremiumReceivableProceedsFromPremiumsReceived	274000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Proceeds From Premiums Received FinancialGuaranteeInsuranceContractsPremiumReceivableProceedsFromPremiumsReceived	297000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	6000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Change In Period Of Contract FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentChangeInPeriodOfContract	-9000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable	22000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Premiums Receivable Accretion Of Discount On Premium Receivable FinancialGuaranteeInsuranceContractsPremiumsReceivableAccretionOfDiscountOnPremiumReceivable	14000000	USD
	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslation	-22000000	USD
	ago	Financial Guarantee Insurance Contracts Premiums Receivable Adjustment Foreign Exchange Translation FinancialGuaranteeInsuranceContractsPremiumsReceivableAdjustmentForeignExchangeTranslation	-14000000	USD
CY2021Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Expected To Be Collected FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollected	4000000	USD
CY2020Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable Premium Expected To Be Collected FinancialGuaranteeInsuranceContractsPremiumReceivablePremiumExpectedToBeCollected	0	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	1377000000	USD
CY2020Q3	ago	Financial Guarantee Insurance Contracts Premium Receivable Excluding Other Non Financial Guarantee FinancialGuaranteeInsuranceContractsPremiumReceivableExcludingOtherNonFinancialGuarantee	1320000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	1000000	USD
CY2020Q3	ago	Financial Guarantee Insurance Contracts Premium Receivable Specialty Insurance FinancialGuaranteeInsuranceContractsPremiumReceivableSpecialtyInsurance	1000000	USD
CY2021Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1378000000	USD
CY2020Q3	us-gaap	Financial Guarantee Insurance Contracts Premium Receivable FinancialGuaranteeInsuranceContractsPremiumReceivable	1321000000	USD
	us-gaap	Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0078
CY2020	us-gaap	Financial Guarantee Insurance Contracts Claim Liability Weighted Average Risk Free Discount Rate FinancialGuaranteeInsuranceContractsClaimLiabilityWeightedAverageRiskFreeDiscountRate	0.0060
CY2021Q3	ago	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Netof Reinsuranceand Salvage Subrogationand Other Recoveries LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetofReinsuranceandSalvageSubrogationandOtherRecoveries	-153000000	USD
CY2020Q4	ago	Liabilityfor Unpaid Claimsand Claims Adjustment Expense Netof Reinsuranceand Salvage Subrogationand Other Recoveries LiabilityforUnpaidClaimsandClaimsAdjustmentExpenseNetofReinsuranceandSalvageSubrogationandOtherRecoveries	122000000	USD
CY2020Q4	ago	Reservefor Lossesand Loss Adjustment Expenses Netof Reinsuranceand Salvageand Subrogation Including Other Recoverables ReserveforLossesandLossAdjustmentExpensesNetofReinsuranceandSalvageandSubrogationIncludingOtherRecoverables	-958000000	USD
CY2021Q3	ago	Reserve For Losses And Loss Adjustment Expenses Net Of Reinsurance And Salvage And Subrogation Recoveries ReserveForLossesAndLossAdjustmentExpensesNetOfReinsuranceAndSalvageAndSubrogationRecoveries	-153000000	USD
CY2020Q4	ago	Reserve For Losses And Loss Adjustment Expenses Net Of Reinsurance And Salvage And Subrogation Recoveries ReserveForLossesAndLossAdjustmentExpensesNetOfReinsuranceAndSalvageAndSubrogationRecoveries	122000000	USD
CY2021Q3	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	981000000	USD
CY2020Q4	us-gaap	Liability For Claims And Claims Adjustment Expense LiabilityForClaimsAndClaimsAdjustmentExpense	1088000000	USD
CY2021Q3	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	7000000	USD
CY2020Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	8000000	USD
CY2021Q3	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	974000000	USD
CY2020Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	1080000000	USD
CY2021Q3	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	1148000000	USD
CY2020Q4	us-gaap	Salvage And Subrogation Recoveries Value SalvageAndSubrogationRecoveriesValue	991000000	USD
CY2021Q3	ago	Ceded Salvage And Subrogation Recoveries Value CededSalvageAndSubrogationRecoveriesValue	21000000	USD
CY2020Q4	ago	Ceded Salvage And Subrogation Recoveries Value CededSalvageAndSubrogationRecoveriesValue	33000000	USD
CY2021Q3	ago	Reservefor Lossesand Loss Adjustment Expenses Netof Reinsuranceand Salvageand Subrogation Including Other Recoverables ReserveforLossesandLossAdjustmentExpensesNetofReinsuranceandSalvageandSubrogationIncludingOtherRecoverables	-1127000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	70000000	USD
CY2020Q3	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	334000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	471000000	USD
CY2020Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	529000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	-101000000	USD
	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	229000000	USD
CY2021Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	199000000	USD
CY2019Q4	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	737000000	USD
	ago	Guarantor Obligations Net Expected Loss Development After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLossDevelopmentAfterRecoveriesforRepresentationsandWarranties	101000000	USD
	ago	Guarantor Obligations Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsLiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidAfterRecoveriesforRepresentationsandWarranties	367000000	USD
CY2020Q3	ago	Guarantor Obligations Net Expected Losstobe Paid After Recoveriesfor Representationsand Warranties GuarantorObligationsNetExpectedLosstobePaidAfterRecoveriesforRepresentationsandWarranties	471000000	USD
	ago	Reinsurance Recoverables Periodafter Endof Reporting Periodfor Settlementof Ceded Paid Losses ReinsuranceRecoverablesPeriodafterEndofReportingPeriodforSettlementofCededPaidLosses	P45D
CY2021Q3	ago	Insured Financial Obligations Liabilityfor Unpaid Claims Adjustment Expense Claims Paid InsuredFinancialObligationsLiabilityforUnpaidClaimsAdjustmentExpenseClaimsPaid	5000000	USD
CY2020Q3	ago	Insured Financial Obligations Liabilityfor Unpaid Claims Adjustment Expense Claims Paid InsuredFinancialObligationsLiabilityforUnpaidClaimsAdjustmentExpenseClaimsPaid	11000000	USD
	ago	Insured Financial Obligations Liabilityfor Unpaid Claims Adjustment Expense Claims Paid InsuredFinancialObligationsLiabilityforUnpaidClaimsAdjustmentExpenseClaimsPaid	15000000	USD
	ago	Insured Financial Obligations Liabilityfor Unpaid Claims Adjustment Expense Claims Paid InsuredFinancialObligationsLiabilityforUnpaidClaimsAdjustmentExpenseClaimsPaid	20000000	USD
CY2021Q3	ago	Expected Loss Adjustment Expense To Be Paid ExpectedLossAdjustmentExpenseToBePaid	27000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed During Fourth Quarter Following Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedDuringFourthQuarterFollowingBalanceSheetDate	8000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Second Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinSecondFullFiscalYear	31000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Third Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinThirdFullFiscalYear	31000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Fourth Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinFourthFullFiscalYear	30000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensedin Fifth Full Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedinFifthFullFiscalYear	30000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Morethan Fiveand Within10 Yearsfrom Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedMorethanFiveandWithin10YearsfromBalanceSheetDate	118000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Morethan10andwithin15 Yearsfrom Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedMorethan10andwithin15YearsfromBalanceSheetDate	77000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Morethan15andwithin20 Yearsfrom Balance Sheet Date FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedMorethan15andwithin20YearsfromBalanceSheetDate	18000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Future Expected Net Losstobe Expensed Beyond Twentieth Fiscal Year FinancialGuaranteeInsuranceContractsFutureExpectedNetLosstobeExpensedBeyondTwentiethFiscalYear	4000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Net Losstobe Expensed Present Value FinancialGuaranteeInsuranceContractsNetLosstobeExpensedPresentValue	347000000	USD
CY2021Q3	ago	Scheduleof Insured Financial Obligationswith Credit Deterioration Reductionsof Gross Claim Liability Netof Reinsurance Recoverable Discount ScheduleofInsuredFinancialObligationswithCreditDeteriorationReductionsofGrossClaimLiabilityNetofReinsuranceRecoverableDiscount	104000000	USD
CY2021Q3	ago	Financial Guarantee Insurance Contracts Net Losstobe Expensed Undiscounted FinancialGuaranteeInsuranceContractsNetLosstobeExpensedUndiscounted	451000000	USD
CY2021Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	-68000000	USD
CY2020Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	73000000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	-54000000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	130000000	USD
	us-gaap	Average Term Of Credit Risk Derivatives1 AverageTermOfCreditRiskDerivatives1	P12Y8M12D
CY2020	us-gaap	Average Term Of Credit Risk Derivatives1 AverageTermOfCreditRiskDerivatives1	P11Y10M24D
CY2021Q3	ago	Financial Guaranty Contracts Accountedforas Credit Derivatives Outstanding Principal Amount FinancialGuarantyContractsAccountedforasCreditDerivativesOutstandingPrincipalAmount	4286000000	USD
CY2021Q3	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-134000000	USD
CY2020Q4	ago	Financial Guaranty Contracts Accountedforas Credit Derivatives Outstanding Principal Amount FinancialGuarantyContractsAccountedforasCreditDerivativesOutstandingPrincipalAmount	5371000000	USD
CY2020Q4	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-100000000	USD
CY2021Q3	ago	Credit Derivative Realized Gains CreditDerivativeRealizedGains	2000000	USD
CY2020Q3	ago	Credit Derivative Realized Gains CreditDerivativeRealizedGains	1000000	USD
	ago	Credit Derivative Realized Gains CreditDerivativeRealizedGains	5000000	USD
	ago	Credit Derivative Realized Gains CreditDerivativeRealizedGains	4000000	USD
CY2021Q3	ago	Credit Derivative Losses CreditDerivativeLosses	1000000	USD
CY2020Q3	ago	Credit Derivative Losses CreditDerivativeLosses	6000000	USD
	ago	Credit Derivative Losses CreditDerivativeLosses	1000000	USD
	ago	Credit Derivative Losses CreditDerivativeLosses	9000000	USD
CY2021Q3	ago	Credit Derivative Realized Gain Lossand Other Settlements CreditDerivativeRealizedGainLossandOtherSettlements	1000000	USD
CY2020Q3	ago	Credit Derivative Realized Gain Lossand Other Settlements CreditDerivativeRealizedGainLossandOtherSettlements	-5000000	USD
	ago	Credit Derivative Realized Gain Lossand Other Settlements CreditDerivativeRealizedGainLossandOtherSettlements	4000000	USD
	ago	Credit Derivative Realized Gain Lossand Other Settlements CreditDerivativeRealizedGainLossandOtherSettlements	-5000000	USD
CY2021Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	20000000	USD
CY2021Q3	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-134000000	USD
CY2020Q4	us-gaap	Credit Risk Derivatives At Fair Value Net CreditRiskDerivativesAtFairValueNet	-100000000	USD
CY2021Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	97000000	USD
CY2020Q3	us-gaap	Direct Premiums Written DirectPremiumsWritten	122000000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	256000000	USD
	us-gaap	Direct Premiums Written DirectPremiumsWritten	334000000	USD
CY2021Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	9000000	USD
CY2020Q3	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	-1000000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	21000000	USD
	us-gaap	Assumed Premiums Written AssumedPremiumsWritten	0	USD
CY2021Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	0	USD
CY2020Q3	us-gaap	Ceded Premiums Written CededPremiumsWritten	-1000000	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	0	USD
	us-gaap	Ceded Premiums Written CededPremiumsWritten	-3000000	USD
CY2021Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	106000000	USD
CY2020Q3	us-gaap	Premiums Written Net PremiumsWrittenNet	122000000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	277000000	USD
	us-gaap	Premiums Written Net PremiumsWrittenNet	337000000	USD
CY2021Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	97000000	USD
CY2020Q3	us-gaap	Direct Premiums Earned DirectPremiumsEarned	100000000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	287000000	USD
	us-gaap	Direct Premiums Earned DirectPremiumsEarned	307000000	USD
CY2021Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	6000000	USD
CY2020Q3	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	8000000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	22000000	USD
	us-gaap	Assumed Premiums Earned AssumedPremiumsEarned	28000000	USD
CY2021Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1000000	USD
CY2020Q3	us-gaap	Ceded Premiums Earned CededPremiumsEarned	1000000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	2000000	USD
	us-gaap	Ceded Premiums Earned CededPremiumsEarned	4000000	USD
CY2021Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	102000000	USD
CY2020Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	107000000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	307000000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	331000000	USD
CY2021Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	-70000000	USD
CY2020Q3	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	72000000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	-37000000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Gross PolicyholderBenefitsAndClaimsIncurredGross	118000000	USD
CY2021Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	4000000	USD
CY2020Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	4000000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	2000000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Assumed ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountAssumed	15000000	USD
CY2021Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	2000000	USD
CY2020Q3	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	3000000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	19000000	USD
	us-gaap	Reinsurance Effect On Claims And Benefits Incurred Amount Ceded ReinsuranceEffectOnClaimsAndBenefitsIncurredAmountCeded	3000000	USD
CY2021Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	-68000000	USD
CY2020Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	73000000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	-54000000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	130000000	USD
CY2021Q3	ago	Ceded Premium Payable Netof Commissions CededPremiumPayableNetofCommissions	4000000	USD
CY2020Q4	ago	Ceded Premium Payable Netof Commissions CededPremiumPayableNetofCommissions	4000000	USD
CY2021Q3	ago	Ceded Expected Loss And Loss Adjustment Expense CededExpectedLossAndLossAdjustmentExpense	-12000000	USD
CY2020Q4	ago	Ceded Expected Loss And Loss Adjustment Expense CededExpectedLossAndLossAdjustmentExpense	-23000000	USD
CY2021Q3	ago	Insured Financial Obligations Ceded Par Outstanding InsuredFinancialObligationsCededParOutstanding	378000000	USD
CY2020Q4	ago	Insured Financial Obligations Ceded Par Outstanding InsuredFinancialObligationsCededParOutstanding	418000000	USD
CY2021Q3	ago	Specialty Insuranceand Reinsurance Ceded Par Outstanding SpecialtyInsuranceandReinsuranceCededParOutstanding	539000000	USD
CY2020Q4	ago	Specialty Insuranceand Reinsurance Ceded Par Outstanding SpecialtyInsuranceandReinsuranceCededParOutstanding	556000000	USD
	ago	Insured Financial Obligations Net Par Exposures Reassumed InsuredFinancialObligationsNetParExposuresReassumed	336000000	USD
	us-gaap	Increase Decrease In Unearned Premiums IncreaseDecreaseInUnearnedPremiums	5000000	USD
	ago	Commutation Gain Loss CommutationGainLoss	38000000	USD
CY2021Q3	us-gaap	Short Term Investments ShortTermInvestments	694000000	USD
CY2020Q4	us-gaap	Short Term Investments ShortTermInvestments	851000000	USD
CY2021Q3	us-gaap	Investments Investments	9617000000	USD
CY2020Q4	us-gaap	Investments Investments	9838000000	USD
CY2021Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	79000000	USD
CY2020Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	75000000	USD
CY2021Q3	ago	Percentageof Availableforsale Securitiesat Amortized Cost PercentageofAvailableforsaleSecuritiesatAmortizedCost	1
CY2021Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	8882000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	35000000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	558000000	USD
CY2021Q3	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	48000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	9357000000	USD
CY2021Q3	ago	Accumulated Other Comprehensive Income Loss Otherthan Temporary Impairment Not Credit Loss Before Tax Debt Securities Total AccumulatedOtherComprehensiveIncomeLossOtherthanTemporaryImpairmentNotCreditLossBeforeTaxDebtSecuritiesTotal	-23000000	USD
CY2020Q4	ago	Percentageof Availableforsale Securitiesat Amortized Cost PercentageofAvailableforsaleSecuritiesatAmortizedCost	1
CY2020Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Excluding Accrued Interest Before Allowance For Credit Loss DebtSecuritiesAvailableForSaleAmortizedCostExcludingAccruedInterestBeforeAllowanceForCreditLoss	9055000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	78000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Gain Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedGainBeforeTax	698000000	USD
CY2020Q4	us-gaap	Available For Sale Debt Securities Accumulated Gross Unrealized Loss Before Tax AvailableForSaleDebtSecuritiesAccumulatedGrossUnrealizedLossBeforeTax	51000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Excluding Accrued Interest DebtSecuritiesAvailableForSaleExcludingAccruedInterest	9624000000	USD
CY2020Q4	ago	Accumulated Other Comprehensive Income Loss Otherthan Temporary Impairment Not Credit Loss Before Tax Debt Securities Total AccumulatedOtherComprehensiveIncomeLossOtherthanTemporaryImpairmentNotCreditLossBeforeTaxDebtSecuritiesTotal	-39000000	USD
CY2021Q3	ago	Government Agency Obligations As Percentage Of Total Mortgage Backed Securities GovernmentAgencyObligationsAsPercentageOfTotalMortgageBackedSecurities	0.32
CY2020Q4	ago	Government Agency Obligations As Percentage Of Total Mortgage Backed Securities GovernmentAgencyObligationsAsPercentageOfTotalMortgageBackedSecurities	0.35
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	961000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	19000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	83000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	6000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	1044000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	25000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	376	Security
CY2021Q3	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	24	Security
CY2020Q3	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	2000000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-35000000	USD
	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	25000000	USD
CY2021Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	21000000	USD
CY2020Q3	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-3000000	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	-31000000	USD
	us-gaap	Derivative Gain Loss On Derivative Net DerivativeGainLossOnDerivativeNet	20000000	USD
CY2021Q3	ago	Credit Risk Derivatives At Fair Value Before Effect Of Credit Spread Net CreditRiskDerivativesAtFairValueBeforeEffectOfCreditSpreadNet	-224000000	USD
CY2020Q4	ago	Credit Risk Derivatives At Fair Value Before Effect Of Credit Spread Net CreditRiskDerivativesAtFairValueBeforeEffectOfCreditSpreadNet	-313000000	USD
CY2021Q3	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	90000000	USD
CY2020Q4	us-gaap	Derivative Credit Risk Valuation Adjustment Derivative Liabilities DerivativeCreditRiskValuationAdjustmentDerivativeLiabilities	213000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	398	Security
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months	362000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss	3000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger	166000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Accumulated Loss DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss	9000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position DebtSecuritiesAvailableForSaleUnrealizedLossPosition	528000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Accumulated Loss DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss	12000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position Less Than12 Months Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions	94	Security
CY2020Q4	us-gaap	Debt Securities Available For Sale Continuous Unrealized Loss Position12 Months Or Longer Number Of Positions DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions	46	Security
CY2020Q4	us-gaap	Debt Securities Available For Sale Unrealized Loss Position Number Of Positions DebtSecuritiesAvailableForSaleUnrealizedLossPositionNumberOfPositions	139	Security
CY2021Q3	ago	Available For Sale Securities Continuous Unrealized Loss Position Greater Than10 Percent Of Book Value Twelve Months Or Longer Number AvailableForSaleSecuritiesContinuousUnrealizedLossPositionGreaterThan10PercentOfBookValueTwelveMonthsOrLongerNumber	20	Security
CY2020Q4	ago	Available For Sale Securities Continuous Unrealized Loss Position Greater Than10 Percent Of Book Value Twelve Months Or Longer Number AvailableForSaleSecuritiesContinuousUnrealizedLossPositionGreaterThan10PercentOfBookValueTwelveMonthsOrLongerNumber	11	Security
CY2021Q3	ago	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Greater Than10 Percent Book Value Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerGreaterThan10PercentBookValueAggregateLosses	5000000	USD
CY2020Q4	ago	Available For Sale Securities Continuous Unrealized Loss Position Twelve Months Or Longer Greater Than10 Percent Book Value Aggregate Losses AvailableForSaleSecuritiesContinuousUnrealizedLossPositionTwelveMonthsOrLongerGreaterThan10PercentBookValueAggregateLosses	8000000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	204000000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	229000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	-5000000	USD
CY2021Q3	us-gaap	Assets Held In Trust AssetsHeldInTrust	254000000	USD
CY2020Q4	us-gaap	Assets Held In Trust AssetsHeldInTrust	262000000	USD
CY2021Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	67000000	USD
CY2020Q3	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	73000000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	208000000	USD
	us-gaap	Interest And Dividend Income Operating InterestAndDividendIncomeOperating	235000000	USD
CY2021Q3	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	1000000	USD
CY2020Q3	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	2000000	USD
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	4000000	USD
	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6000000	USD
CY2021Q3	us-gaap	Net Investment Income NetInvestmentIncome	66000000	USD
CY2020Q3	us-gaap	Net Investment Income NetInvestmentIncome	71000000	USD
CY2021Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	23000000	USD
CY2020Q3	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	7000000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	66000000	USD
	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	3000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	3000000	USD
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	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	12000000	USD
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CY2020Q3	ago	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	0	USD
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CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	0	USD
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CY2021Q3	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	3000000	USD
CY2020Q3	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	13000000	USD
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	4000000	USD
	us-gaap	Debt Securities Realized Gain Loss DebtSecuritiesRealizedGainLoss	12000000	USD
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CY2020Q3	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	5000000	USD
	us-gaap	Foreign Currency Transaction Gain Loss Realized ForeignCurrencyTransactionGainLossRealized	6000000	USD
CY2020Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	137000000	USD
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CY2021Q3	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	0	USD
CY2021Q2	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	39000000	USD
CY2020Q2	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	75000000	USD
CY2020Q4	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	78000000	USD
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	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	1000000	USD
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	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Securities Sold DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold	42000000	USD
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CY2021Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not To Sell Before Recovery Credit Loss Previously Recorded Expense Reversal DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal	-4000000	USD
CY2021Q3	ago	Variable Interest Entity Numberof Policies Monitored Not Withinthe Scopeof Asc810 VariableInterestEntityNumberofPoliciesMonitoredNotWithintheScopeofASC810	15000	policy
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not To Sell Before Recovery Credit Loss Previously Recorded Expense Reversal DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal	1000000	USD
	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not To Sell Before Recovery Credit Loss Previously Recorded Expense Reversal DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal	-2000000	USD
	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not To Sell Before Recovery Credit Loss Previously Recorded Expense Reversal DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotToSellBeforeRecoveryCreditLossPreviouslyRecordedExpenseReversal	13000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	35000000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	76000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	35000000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Amortized Cost Allowance For Credit Loss Excluding Accrued Interest DebtSecuritiesAvailableForSaleAmortizedCostAllowanceForCreditLossExcludingAccruedInterest	76000000	USD
CY2021Q3	ago	Variable Interest Entity Other Consolidated Carrying Amount Assets VariableInterestEntityOtherConsolidatedCarryingAmountAssets	96000000	USD
CY2021Q3	ago	Variable Interest Entity Other Consolidated Carrying Amount Liabilities VariableInterestEntityOtherConsolidatedCarryingAmountLiabilities	9000000	USD
CY2020Q4	ago	Variable Interest Entity Other Consolidated Carrying Amount Assets VariableInterestEntityOtherConsolidatedCarryingAmountAssets	96000000	USD
CY2020Q4	ago	Variable Interest Entity Other Consolidated Carrying Amount Liabilities VariableInterestEntityOtherConsolidatedCarryingAmountLiabilities	3000000	USD
CY2021Q3	ago	Variable Interest Entity Numberof Policies Monitored VariableInterestEntityNumberofPoliciesMonitored	17000	policy
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CY2020Q4	ago	Percentage Of Cds Contracts Fair Valued Using Minimum Premium PercentageOfCdsContractsFairValuedUsingMinimumPremium	0.51
CY2021Q3	us-gaap	Assets Sold Under Agreements To Repurchase Repurchase Liability AssetsSoldUnderAgreementsToRepurchaseRepurchaseLiability	19000000	USD
CY2021Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	20000000	USD
CY2020Q3	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	17000000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	65000000	USD
	us-gaap	Revenue From Contract With Customer Excluding Assessed Tax RevenueFromContractWithCustomerExcludingAssessedTax	60000000	USD
CY2021Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	53000000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	100000000	USD
CY2021Q3	ago	Deferred Tax Assets Liabilities Net Current1 DeferredTaxAssetsLiabilitiesNetCurrent1	-12000000	USD
CY2020Q4	ago	Deferred Tax Assets Liabilities Net Current1 DeferredTaxAssetsLiabilitiesNetCurrent1	21000000	USD
	ago	Tax Cutsand Jobs Actof2017 Incomplete Accounting Transition Taxfor Accumulated Foreign Earnings Tax Credit Realized TaxCutsandJobsActof2017IncompleteAccountingTransitionTaxforAccumulatedForeignEarningsTaxCreditRealized	24000000	USD
CY2021Q3	us-gaap	Tax Credit Carryforward Valuation Allowance TaxCreditCarryforwardValuationAllowance	24000000	USD
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CY2021Q3	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	-6000000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	19000000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	16000000	USD
	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	50000000	USD
CY2021Q3	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	4000000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	5000000	USD
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	12000000	USD
	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	13000000	USD
CY2021Q3	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	0	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-17000000	USD
	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	0	USD
	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	-17000000	USD
CY2021Q3	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-4000000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-7000000	USD
	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-4000000	USD
	us-gaap	Income Tax Reconciliation Prior Year Income Taxes IncomeTaxReconciliationPriorYearIncomeTaxes	-7000000	USD
CY2021Q3	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-2000000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1000000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	5000000	USD
	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	2000000	USD
CY2021Q3	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	4000000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	-4000000	USD
	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	6000000	USD
	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	3000000	USD
CY2021Q3	ago	Effective Income Tax Rate Reconciliation Taxeson Reinsurance Amount EffectiveIncomeTaxRateReconciliationTaxesonReinsuranceAmount	-4000000	USD
CY2020Q3	ago	Effective Income Tax Rate Reconciliation Taxeson Reinsurance Amount EffectiveIncomeTaxRateReconciliationTaxesonReinsuranceAmount	4000000	USD
	ago	Effective Income Tax Rate Reconciliation Taxeson Reinsurance Amount EffectiveIncomeTaxRateReconciliationTaxesonReinsuranceAmount	-1000000	USD
	ago	Effective Income Tax Rate Reconciliation Taxeson Reinsurance Amount EffectiveIncomeTaxRateReconciliationTaxesonReinsuranceAmount	3000000	USD
CY2021Q3	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1000000	USD
CY2020Q3	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1000000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-2000000	USD
	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1000000	USD
CY2021Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-15000000	USD
CY2020Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-10000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	8000000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	20000000	USD
CY2021Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-3.133
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.060
CY2020Q3	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	-0.120
	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.084
CY2021Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	5000000	USD
CY2020Q3	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	79000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	145000000	USD
	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	239000000	USD
CY2021Q3	us-gaap	Revenues Revenues	212000000	USD
CY2020Q3	us-gaap	Revenues Revenues	268000000	USD
	us-gaap	Revenues Revenues	585000000	USD
	us-gaap	Revenues Revenues	736000000	USD
CY2021Q3	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	1728000000	USD
CY2021Q3	us-gaap	Long Term Debt LongTermDebt	1671000000	USD
CY2020Q4	us-gaap	Debt Instrument Face Amount DebtInstrumentFaceAmount	1429000000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1224000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-70000000	USD
CY2021Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-71000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	85000000	USD
CY2020Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	71000000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	-123000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-124000000	USD
	us-gaap	Other Comprehensive Income Loss Before Reclassifications Net Of Tax OtherComprehensiveIncomeLossBeforeReclassificationsNetOfTax	74000000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	62000000	USD
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	17000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	86000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	126000000	USD
	us-gaap	Net Income Loss NetIncomeLoss	214000000	USD
CY2021Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2020Q3	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
	us-gaap	Participating Securities Distributed And Undistributed Earnings Loss Basic ParticipatingSecuritiesDistributedAndUndistributedEarningsLossBasic	0	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17000000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	126000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	214000000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	72700000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83200000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74900000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	87400000	shares
CY2021Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.22
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.03
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.67
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.45
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	17000000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	86000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	126000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	214000000	USD
CY2021Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
CY2020Q3	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
	us-gaap	Undistributed Earnings Loss Allocated To Participating Securities Diluted UndistributedEarningsLossAllocatedToParticipatingSecuritiesDiluted	0	USD
CY2021Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	17000000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	86000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	126000000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Diluted NetIncomeLossAvailableToCommonStockholdersDiluted	214000000	USD
CY2021Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	72700000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83200000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	74900000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	87400000	shares
CY2021Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	900000	shares
CY2020Q3	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	600000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	800000	shares
	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	600000	shares
CY2021Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	73600000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83800000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	75700000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	88000000.0	shares
CY2021Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.22
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.02
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.66
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.43
CY2021Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020Q3	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	500000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	100000	shares
	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	1000000.0	shares
CY2021Q3	us-gaap	Net Income Loss NetIncomeLoss	17000000	USD
CY2020Q3	us-gaap	Net Income Loss NetIncomeLoss	86000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	3000000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	16000000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	12000000	USD
	us-gaap	Debt Securities Available For Sale Realized Gain DebtSecuritiesAvailableForSaleRealizedGain	39000000	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	6000000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	3000000	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	10000000	USD
	us-gaap	Debt Securities Available For Sale Realized Loss DebtSecuritiesAvailableForSaleRealizedLoss	12000000	USD
CY2021Q3	ago	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	1000000	USD
CY2020Q3	ago	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	0	USD
	ago	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	1000000	USD
	ago	Net Realized Investment Gains Losses NetRealizedInvestmentGainsLosses	0	USD
CY2021Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	-5000000	USD
CY2020Q3	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	0	USD
	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	-1000000	USD
	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Writeoff DebtSecuritiesAvailableForSaleAllowanceForCreditLossWriteoff	15000000	USD

Files In Submission

Name	View Source	Status
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0001273813-21-000062-index.html	Edgar Link	pending
0001273813-21-000062.txt	Edgar Link	pending
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ago-09302021x10qex22.htm	Edgar Link	pending
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$AGO ASSURED GUARANTY LTD Stock $ago

2021 Q4 Form 10-Q Financial Statement

#000127381321000062 Filed on November 05, 2021

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