$AFG
AMERICAN FINANCIAL GROUP INC Stock $afg

$afg Overview Financials Valuation SEC Filings Company Website

2024 Q2 Form 10-Q Financial Statement

#000104204624000012 Filed on May 03, 2024

Income Statement

Concept	2024 Q2	2024 Q1
Revenue	$1.900B	$1.906B
YoY Change	3.26%	9.54%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$506.0M	$503.0M
YoY Change	4.33%	6.34%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$19.00M	$20.00M
YoY Change	0.0%	0.0%
% of Gross Profit
Operating Expenses	$506.0M	$1.583B
YoY Change	-67.69%	234.67%
Operating Profit	$271.0M	$304.0M
YoY Change	6.27%	15.15%
Interest Expense	$19.00M	-$19.00M
YoY Change	-200.0%	-200.0%
% of Operating Profit	7.01%	-6.25%
Other Income/Expense, Net
YoY Change
Pretax Income	$271.0M	$304.0M
YoY Change	6.27%	15.15%
Income Tax	$62.00M	$62.00M
% Of Pretax Income	22.88%	20.39%
Net Earnings	$209.0M	$242.0M
YoY Change	4.5%	14.15%
Net Earnings / Revenue	11.0%	12.7%
Basic Earnings Per Share	$2.49	$2.89
Diluted Earnings Per Share	$2.49	$2.89
COMMON SHARES
Basic Shares Outstanding	83.87M shares	83.66M shares
Diluted Shares Outstanding	83.90M shares	83.80M shares

Balance Sheet

Concept	2024 Q2	2024 Q1
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$1.121B	$1.087B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets	$758.0M	$958.0M
YoY Change	5.13%	50.39%
LONG-TERM ASSETS
Property, Plant & Equipment	$206.0M	$181.0M
YoY Change	23.35%	58.77%
Goodwill	$305.0M	$305.0M
YoY Change	23.98%	23.98%
Intangibles
YoY Change
Long-Term Investments	$1.882B	$1.848B
YoY Change	7.18%	6.64%
Other Assets
YoY Change
Total Long-Term Assets	$29.16B	$29.04B
YoY Change	2.92%	4.31%
TOTAL ASSETS
Total Short-Term Assets	$758.0M	$958.0M
Total Long-Term Assets	$29.16B	$29.04B
Total Assets	$29.91B	$30.00B
YoY Change	2.98%	5.34%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses	$227.0M	$204.0M
YoY Change	19.47%	61.9%
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$227.0M	$204.0M
YoY Change	19.47%	61.9%
LONG-TERM LIABILITIES
Long-Term Debt	$1.475B	$1.475B
YoY Change	0.07%	-0.2%
Other Long-Term Liabilities	$6.228B	$6.304B
YoY Change	-7.62%	-7.69%
Total Long-Term Liabilities	$7.703B	$7.779B
YoY Change	-6.24%	-6.36%
TOTAL LIABILITIES
Total Short-Term Liabilities	$227.0M	$204.0M
Total Long-Term Liabilities	$7.703B	$7.779B
Total Liabilities	$25.53B	$25.76B
YoY Change	1.89%	4.98%
SHAREHOLDERS EQUITY
Retained Earnings
YoY Change
Common Stock	$1.476B	$1.466B
YoY Change	0.96%	0.48%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$4.384B	$4.240B
YoY Change
Total Liabilities & Shareholders Equity	$29.91B	$30.00B
YoY Change	2.98%	5.34%

Cashflow Statement

Concept	2024 Q2	2024 Q1
OPERATING ACTIVITIES
Net Income	$209.0M	$242.0M
YoY Change	4.5%	14.15%
Depreciation, Depletion And Amortization	$19.00M	$20.00M
YoY Change	0.0%	0.0%
Cash From Operating Activities	-$88.00M	$107.0M
YoY Change	-176.52%	-73.45%
INVESTING ACTIVITIES
Capital Expenditures	$33.00M	$38.00M
YoY Change	65.0%	192.31%
Acquisitions
YoY Change
Other Investing Activities	$182.0M	-$117.0M
YoY Change	-42.22%
Cash From Investing Activities	$149.0M	-$155.0M
YoY Change	-49.49%	-312.33%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net		$0.00
YoY Change		-100.0%
Cash From Financing Activities	-27.00M	-$90.00M
YoY Change	-90.32%	-81.67%
NET CHANGE
Cash From Operating Activities	-88.00M	$107.0M
Cash From Investing Activities	149.0M	-$155.0M
Cash From Financing Activities	-27.00M	-$90.00M
Net Change In Cash	34.00M	-$138.0M
YoY Change	-74.05%	820.0%
FREE CASH FLOW
Cash From Operating Activities	-$88.00M	$107.0M
Capital Expenditures	$33.00M	$38.00M
Free Cash Flow	-$121.0M	$69.00M
YoY Change	-227.37%	-82.31%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2023Q4	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2024Q1	us-gaap	Operating Lease Liability Current Statement Of Financial Position Extensible List OperatingLeaseLiabilityCurrentStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherLiabilities
CY2024Q1	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset Statement Of Financial Position Extensible List OperatingLeaseRightOfUseAssetStatementOfFinancialPositionExtensibleList	http://fasb.org/us-gaap/2023#OtherAssets
CY2024Q1	us-gaap	Net Investment Income NetInvestmentIncome	198000000	usd
CY2023Q1	us-gaap	Net Investment Income NetInvestmentIncome	217000000	usd
CY2024Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	14000000	usd
CY2023Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	-46000000	usd
CY2024Q1	afg	Investment Income Of Managed Investment Entities InvestmentIncomeOfManagedInvestmentEntities	99000000	usd
CY2023Q1	afg	Investment Income Of Managed Investment Entities InvestmentIncomeOfManagedInvestmentEntities	104000000	usd
CY2024Q1	afg	Gain Losson Changein Fair Valueof Assetsand Liabilitiesof Managed Investment Entities GainLossonChangeinFairValueofAssetsandLiabilitiesofManagedInvestmentEntities	10000000	usd
CY2023Q1	afg	Gain Losson Changein Fair Valueof Assetsand Liabilitiesof Managed Investment Entities GainLossonChangeinFairValueofAssetsandLiabilitiesofManagedInvestmentEntities	-4000000	usd
CY2024Q1	us-gaap	Other Income OtherIncome	39000000	usd
CY2023Q1	us-gaap	Other Income OtherIncome	32000000	usd
CY2024Q1	us-gaap	Revenues Revenues	1906000000	usd
CY2023Q1	us-gaap	Revenues Revenues	1740000000	usd
CY2024Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	503000000	usd
CY2023Q1	us-gaap	Selling General And Administrative Expense SellingGeneralAndAdministrativeExpense	473000000	usd
CY2024Q1	us-gaap	Interest Expense InterestExpense	19000000	usd
CY2023Q1	us-gaap	Interest Expense InterestExpense	19000000	usd
CY2024Q1	afg	Expenses Of Managed Investment Entities ExpensesOfManagedInvestmentEntities	92000000	usd
CY2023Q1	afg	Expenses Of Managed Investment Entities ExpensesOfManagedInvestmentEntities	95000000	usd
CY2024Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	76000000	usd
CY2023Q1	us-gaap	Other Cost And Expense Operating OtherCostAndExpenseOperating	69000000	usd
CY2024Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1602000000	usd
CY2023Q1	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1476000000	usd
CY2024Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	304000000	usd
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	264000000	usd
CY2024Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	62000000	usd
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52000000	usd
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	242000000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	212000000	usd
CY2024Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.89
CY2023Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.49
CY2024Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.89
CY2023Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.49
CY2024Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	83700000	shares
CY2023Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	85200000	shares
CY2024Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	83800000	shares
CY2023Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	85400000	shares
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	242000000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	212000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	5000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	61000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-4000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-23000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	9000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	84000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-10000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-5000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-4000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-5000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	8000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	92000000	usd
CY2024Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	246000000	usd
CY2023Q1	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	304000000	usd
CY2024Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	3.21
CY2023Q1	us-gaap	Common Stock Dividends Per Share Declared CommonStockDividendsPerShareDeclared	4.63
CY2024Q1	us-gaap	Net Income Loss NetIncomeLoss	242000000	usd
CY2023Q1	us-gaap	Net Income Loss NetIncomeLoss	212000000	usd
CY2024Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	20000000	usd
CY2023Q1	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	20000000	usd
CY2024Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	14000000	usd
CY2023Q1	us-gaap	Realized Investment Gains Losses RealizedInvestmentGainsLosses	-45000000	usd
CY2024Q1	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	0	usd
CY2023Q1	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	-3000000	usd
CY2024Q1	afg	Increase Decreasein Reinsuranceand Other Receivables IncreaseDecreaseinReinsuranceandOtherReceivables	71000000	usd
CY2023Q1	afg	Increase Decreasein Reinsuranceand Other Receivables IncreaseDecreaseinReinsuranceandOtherReceivables	-162000000	usd
CY2024Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-57000000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	-48000000	usd
CY2024Q1	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	162000000	usd
CY2023Q1	us-gaap	Increase Decrease In Liability For Claims And Claims Adjustment Expense Reserve IncreaseDecreaseInLiabilityForClaimsAndClaimsAdjustmentExpenseReserve	-24000000	usd
CY2024Q1	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-108000000	usd
CY2023Q1	us-gaap	Increase Decrease In Reinsurance Payables IncreaseDecreaseInReinsurancePayables	-124000000	usd
CY2024Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-42000000	usd
CY2023Q1	us-gaap	Increase Decrease In Other Operating Liabilities IncreaseDecreaseInOtherOperatingLiabilities	-28000000	usd
CY2024Q1	afg	Changein Managed Investment Entities Assets And Liabilities ChangeinManagedInvestmentEntitiesAssetsAndLiabilities	124000000	usd
CY2023Q1	afg	Changein Managed Investment Entities Assets And Liabilities ChangeinManagedInvestmentEntitiesAssetsAndLiabilities	-139000000	usd
CY2024Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-15000000	usd
CY2023Q1	us-gaap	Other Operating Activities Cash Flow Statement OtherOperatingActivitiesCashFlowStatement	-44000000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	107000000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	403000000	usd
CY2024Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	408000000	usd
CY2023Q1	us-gaap	Payments To Acquire Available For Sale Securities Debt PaymentsToAcquireAvailableForSaleSecuritiesDebt	575000000	usd
CY2024Q1	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	42000000	usd
CY2023Q1	us-gaap	Payments To Acquire Equity Securities Fv Ni PaymentsToAcquireEquitySecuritiesFvNi	41000000	usd
CY2024Q1	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	89000000	usd
CY2023Q1	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	0	usd
CY2024Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	27000000	usd
CY2023Q1	us-gaap	Payments To Acquire Other Investments PaymentsToAcquireOtherInvestments	49000000	usd
CY2024Q1	afg	Purchases Of Real Estate Property And Equipment PurchasesOfRealEstatePropertyAndEquipment	38000000	usd
CY2023Q1	afg	Purchases Of Real Estate Property And Equipment PurchasesOfRealEstatePropertyAndEquipment	13000000	usd
CY2024Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	378000000	usd
CY2023Q1	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	381000000	usd
CY2024Q1	us-gaap	Proceeds From Sale And Collection Of Mortgage Notes Receivable ProceedsFromSaleAndCollectionOfMortgageNotesReceivable	8000000	usd
CY2023Q1	us-gaap	Proceeds From Sale And Collection Of Mortgage Notes Receivable ProceedsFromSaleAndCollectionOfMortgageNotesReceivable	32000000	usd
CY2024Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	75000000	usd
CY2023Q1	us-gaap	Proceeds From Sale Of Available For Sale Securities Debt ProceedsFromSaleOfAvailableForSaleSecuritiesDebt	342000000	usd
CY2024Q1	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	56000000	usd
CY2023Q1	us-gaap	Proceeds From Sale Of Equity Securities Fv Ni ProceedsFromSaleOfEquitySecuritiesFvNi	56000000	usd
CY2024Q1	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	5000000	usd
CY2023Q1	us-gaap	Proceeds From Sale And Maturity Of Other Investments ProceedsFromSaleAndMaturityOfOtherInvestments	33000000	usd
CY2024Q1	afg	Proceeds From Sales Of Real Estate Property And Equipment ProceedsFromSalesOfRealEstatePropertyAndEquipment	0	usd
CY2023Q1	afg	Proceeds From Sales Of Real Estate Property And Equipment ProceedsFromSalesOfRealEstatePropertyAndEquipment	1000000	usd
CY2024Q1	afg	Purchases Of Investments By Managed Investment Entities PurchasesOfInvestmentsByManagedInvestmentEntities	605000000	usd
CY2023Q1	afg	Purchases Of Investments By Managed Investment Entities PurchasesOfInvestmentsByManagedInvestmentEntities	648000000	usd
CY2024Q1	afg	Proceeds From Sales And Redemptions Of Investments By Managed Investment Entities ProceedsFromSalesAndRedemptionsOfInvestmentsByManagedInvestmentEntities	532000000	usd
CY2023Q1	afg	Proceeds From Sales And Redemptions Of Investments By Managed Investment Entities ProceedsFromSalesAndRedemptionsOfInvestmentsByManagedInvestmentEntities	554000000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-155000000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	73000000	usd
CY2024Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	0	usd
CY2023Q1	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	16000000	usd
CY2024Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	6000000	usd
CY2023Q1	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	4000000	usd
CY2024Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	0	usd
CY2023Q1	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	24000000	usd
CY2024Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	268000000	usd
CY2023Q1	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	393000000	usd
CY2024Q1	afg	Proceeds From Issuance Of Managed Investment Entities ProceedsFromIssuanceOfManagedInvestmentEntities	635000000	usd
CY2023Q1	afg	Proceeds From Issuance Of Managed Investment Entities ProceedsFromIssuanceOfManagedInvestmentEntities	588000000	usd
CY2024Q1	afg	Retirement Of Managed Investment Entities Liabilities RetirementOfManagedInvestmentEntitiesLiabilities	463000000	usd
CY2023Q1	afg	Retirement Of Managed Investment Entities Liabilities RetirementOfManagedInvestmentEntitiesLiabilities	650000000	usd
CY2024Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-90000000	usd
CY2023Q1	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-491000000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-138000000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-15000000	usd
CY2023Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1225000000	usd
CY2022Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	872000000	usd
CY2024Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	1087000000	usd
CY2023Q1	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	857000000	usd
CY2023Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	176000000	usd
CY2024Q1	us-gaap	Operating Lease Liability OperatingLeaseLiability	204000000	usd
CY2024Q1	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	181000000	usd
CY2023Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	198000000	usd
CY2024Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	100000	shares
CY2023Q1	us-gaap	Incremental Common Shares Attributable To Share Based Payment Arrangements IncrementalCommonSharesAttributableToShareBasedPaymentArrangements	200000	shares
CY2024Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2023Q1	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2024Q1	afg	Maturity Period Of Short Term Investment Maximum MaturityPeriodOfShortTermInvestmentMaximum	P3M
CY2024Q1	afg	Level Three Assets Equity Investments That Do Not Qualify For Equity Accounting LevelThreeAssetsEquityInvestmentsThatDoNotQualifyForEquityAccounting	397000000	usd
CY2024Q1	afg	Percentage Of Internally Developed Level Three Assets Compared To Total Level3 Assets PercentageOfInternallyDevelopedLevelThreeAssetsComparedToTotalLevel3Assets	0.60
CY2024Q1	afg	Internally Developed Level3 Assets InternallyDevelopedLevel3Assets	781000000	usd
CY2024Q1	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	2	segment
CY2024Q1	afg	Revenues Before Realized Gains Losses RevenuesBeforeRealizedGainsLosses	1892000000	usd
CY2023Q1	afg	Revenues Before Realized Gains Losses RevenuesBeforeRealizedGainsLosses	1786000000	usd
CY2024Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	14000000	usd
CY2023Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	-46000000	usd
CY2024Q1	us-gaap	Revenues Revenues	1906000000	usd
CY2023Q1	us-gaap	Revenues Revenues	1740000000	usd
CY2024Q1	afg	Operating Income Loss Before Realized Gains Losses And Income Taxes OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes	290000000	usd
CY2023Q1	afg	Operating Income Loss Before Realized Gains Losses And Income Taxes OperatingIncomeLossBeforeRealizedGainsLossesAndIncomeTaxes	310000000	usd
CY2024Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	14000000	usd
CY2023Q1	us-gaap	Marketable Securities Realized Gain Loss MarketableSecuritiesRealizedGainLoss	-46000000	usd
CY2024Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	304000000	usd
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	264000000	usd
CY2024Q1	afg	Number Of Internal Investment Professionals NumberOfInternalInvestmentProfessionals	20	professional
CY2024Q1	afg	Variable Interest Entity Assets VariableInterestEntityAssets	4669000000	usd
CY2024Q1	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	16140000000	usd
CY2024Q1	afg	Variable Interest Entity Liabilities VariableInterestEntityLiabilities	4468000000	usd
CY2024Q1	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	4498000000	usd
CY2023Q4	afg	Variable Interest Entity Assets VariableInterestEntityAssets	4484000000	usd
CY2023Q4	us-gaap	Assets Fair Value Disclosure AssetsFairValueDisclosure	15942000000	usd
CY2023Q4	afg	Variable Interest Entity Liabilities VariableInterestEntityLiabilities	4307000000	usd
CY2023Q4	us-gaap	Liabilities Fair Value Disclosure LiabilitiesFairValueDisclosure	4331000000	usd
CY2024Q1	afg	Level Three Assets As Percentage Of Assets Measured At Fair Value LevelThreeAssetsAsPercentageOfAssetsMeasuredAtFairValue	0.08
CY2024Q1	afg	Percentage Of Level Three Assets That Were Priced Using Non Binding Broker Quotes PercentageOfLevelThreeAssetsThatWerePricedUsingNonBindingBrokerQuotes	0.08
CY2024Q1	afg	Level Three Assets That Were Priced Using Non Binding Broker Quotes LevelThreeAssetsThatWerePricedUsingNonBindingBrokerQuotes	109000000	usd
CY2024Q1	afg	Percentage Of Level Three Assets That Were Priced By Pricing Services PercentageOfLevelThreeAssetsThatWerePricedByPricingServices	0.01
CY2024Q1	afg	Level Three Assets That Were Priced By Pricing Services LevelThreeAssetsThatWerePricedByPricingServices	10000000	usd
CY2024Q1	afg	Percentage Of Level Three Assets Equity Investments That Do Not Qualify For Equity Accounting PercentageOfLevelThreeAssetsEquityInvestmentsThatDoNotQualifyForEquityAccounting	0.31
CY2024Q1	afg	Percentage Of Level Three Assets That Were Priced Using A Discounted Cash Flow Approach PercentageOfLevelThreeAssetsThatWerePricedUsingADiscountedCashFlowApproach	0.73
CY2024Q1	afg	Level Three Assets That Were Priced Using A Discounted Cash Flow Approach LevelThreeAssetsThatWerePricedUsingADiscountedCashFlowApproach	566000000	usd
CY2024Q1	afg	Percentage Of Level Three Assets Equity Securities Priced Using Broker Quotes And Internal Models PercentageOfLevelThreeAssetsEquitySecuritiesPricedUsingBrokerQuotesAndInternalModels	0.18
CY2024Q1	afg	Level Three Assets Equity Securities Priced Using Broker Quotes And Internal Models LevelThreeAssetsEquitySecuritiesPricedUsingBrokerQuotesAndInternalModels	144000000	usd
CY2023Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	1230000000	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	18000000	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	92000000	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	13000000	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	30000000	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	1297000000	usd
CY2023Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	2000000	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Other Comprehensive Income FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	0	usd
CY2024Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	2000000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	1102000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings1 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarnings1	1000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLoss	6000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Purchases FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases	84000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Sales FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales	41000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersIntoLevel3	4000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersOutOfLevel3	28000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Value FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue	1128000000	usd
CY2022Q4	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	25000000	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Earnings FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInEarnings	0	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Gain Loss Included In Other Comprehensive Income FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityGainLossIncludedInOtherComprehensiveIncome	0	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Issues FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilityIssues	0	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Liability Settlements FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisLiabilitySettlements	0	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Into Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersIntoLevel3	0	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliation Liability Transfers Out Of Level3 FairValueMeasurementWithUnobservableInputsReconciliationLiabilityTransfersOutOfLevel3	0	usd
CY2023Q1	us-gaap	Fair Value Measurement With Unobservable Inputs Reconciliations Recurring Basis Liability Value FairValueMeasurementWithUnobservableInputsReconciliationsRecurringBasisLiabilityValue	25000000	usd
CY2024Q1	us-gaap	Equity Method Investments EquityMethodInvestments	1848000000	usd
CY2023Q4	us-gaap	Equity Method Investments EquityMethodInvestments	1814000000	usd
CY2024Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	25000000	usd
CY2023Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	57000000	usd
CY2024Q1	afg	Unfunded Commitments To Limited Partnerships UnfundedCommitmentsToLimitedPartnerships	443000000	usd
CY2023Q4	afg	Unfunded Commitments To Limited Partnerships UnfundedCommitmentsToLimitedPartnerships	418000000	usd
CY2024Q1	afg	Percentage Based On Unrealized Loss Of Available For Sale Fixed Maturities That Are In Unrealized Loss Position And Rated Investment Grade PercentageBasedOnUnrealizedLossOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade	0.95
CY2024Q1	afg	Percentage Based On Fair Value Of Available For Sale Fixed Maturities That Are In Unrealized Loss Position And Rated Investment Grade PercentageBasedOnFairValueOfAvailableForSaleFixedMaturitiesThatAreInUnrealizedLossPositionAndRatedInvestmentGrade	0.95
CY2023Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	12000000	usd
CY2024Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	1000000	usd
CY2024Q1	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
CY2024Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Securities Sold DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold	3000000	usd
CY2024Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	11000000	usd
CY2022Q4	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	11000000	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Not Previously Recorded DebtSecuritiesAvailableForSaleAllowanceForCreditLossNotPreviouslyRecorded	6000000	usd
CY2023Q1	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
CY2023Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss Securities Sold DebtSecuritiesAvailableForSaleAllowanceForCreditLossSecuritiesSold	0	usd
CY2023Q1	us-gaap	Debt Securities Available For Sale Allowance For Credit Loss DebtSecuritiesAvailableForSaleAllowanceForCreditLoss	16000000	usd
CY2024Q1	afg	Collateralized Loan Obligationsand Other Asset Backed Securities Average Useful Life CollateralizedLoanObligationsandOtherAssetBackedSecuritiesAverageUsefulLife	P3Y
CY2024Q1	afg	Mortgage Backed Securities Average Useful Life MortgageBackedSecuritiesAverageUsefulLife	P6Y6M
CY2024Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	25000000	usd
CY2023Q1	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	57000000	usd
CY2024Q1	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	204000000	usd
CY2023Q1	us-gaap	Gross Investment Income Operating GrossInvestmentIncomeOperating	222000000	usd
CY2024Q1	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	6000000	usd
CY2023Q1	us-gaap	Investment Income Investment Expense InvestmentIncomeInvestmentExpense	5000000	usd
CY2024Q1	us-gaap	Net Investment Income NetInvestmentIncome	198000000	usd
CY2023Q1	us-gaap	Net Investment Income NetInvestmentIncome	217000000	usd
CY2024Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	35000000	usd
CY2023Q1	us-gaap	Equity Securities Fv Ni Unrealized Gain Loss EquitySecuritiesFvNiUnrealizedGainLoss	-7000000	usd
CY2024Q1	us-gaap	Derivative Assets DerivativeAssets	80000000	usd
CY2024Q1	us-gaap	Derivative Liabilities DerivativeLiabilities	28000000	usd
CY2023Q4	us-gaap	Derivative Assets DerivativeAssets	87000000	usd
CY2023Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	22000000	usd
CY2024Q1	us-gaap	Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months CashFlowHedgeGainLossToBeReclassifiedWithinTwelveMonths	21000000	usd
CY2024Q1	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	5000000	usd
CY2023Q1	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	10000000	usd
CY2024Q1	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-2000000	usd
CY2023Q1	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	5000000	usd
CY2024Q1	afg	Percentage Of Investment Of Most Subordinate Debt Tranche Of Variable Interest Entity Minimum PercentageOfInvestmentOfMostSubordinateDebtTrancheOfVariableInterestEntityMinimum	0.133
CY2024Q1	afg	Percentage Of Investment Of Most Subordinate Debt Tranche Of Variable Interest Entity Maximum PercentageOfInvestmentOfMostSubordinateDebtTrancheOfVariableInterestEntityMaximum	1
CY2024Q1	afg	Number Of Collateralized Loan Obligation Entities NumberOfCollateralizedLoanObligationEntities	13	collateralized_loan_obligation
CY2024Q1	afg	Number Of Collateralized Loan Obligation Entities Formed During The Period NumberOfCollateralizedLoanObligationEntitiesFormedDuringThePeriod	1	collateralized_loan_obligation
CY2023Q1	afg	Number Of Collateralized Loan Obligation Entities Formed During The Period NumberOfCollateralizedLoanObligationEntitiesFormedDuringThePeriod	1	collateralized_loan_obligation
CY2024Q1	afg	Gain Loss On Change In Fair Value Of Assets Of Variable Interest Entities GainLossOnChangeInFairValueOfAssetsOfVariableInterestEntities	12000000	usd
CY2023Q1	afg	Gain Loss On Change In Fair Value Of Assets Of Variable Interest Entities GainLossOnChangeInFairValueOfAssetsOfVariableInterestEntities	34000000	usd
CY2024Q1	afg	Gain Loss On Change In Fair Value Of Liabilities Of Variable Interest Entities GainLossOnChangeInFairValueOfLiabilitiesOfVariableInterestEntities	-2000000	usd
CY2023Q1	afg	Gain Loss On Change In Fair Value Of Liabilities Of Variable Interest Entities GainLossOnChangeInFairValueOfLiabilitiesOfVariableInterestEntities	-38000000	usd
CY2024Q1	afg	Management Fees Paid By Variable Interest Entities ManagementFeesPaidByVariableInterestEntities	3000000	usd
CY2023Q1	afg	Management Fees Paid By Variable Interest Entities ManagementFeesPaidByVariableInterestEntities	4000000	usd
CY2024Q1	afg	Difference Between Aggregate Unpaid Principal Balance And Fair Value Of Variable Interest Entity Investments DifferenceBetweenAggregateUnpaidPrincipalBalanceAndFairValueOfVariableInterestEntityInvestments	95000000	usd
CY2023Q4	afg	Difference Between Aggregate Unpaid Principal Balance And Fair Value Of Variable Interest Entity Investments DifferenceBetweenAggregateUnpaidPrincipalBalanceAndFairValueOfVariableInterestEntityInvestments	109000000	usd
CY2024Q1	afg	Difference Between Aggregate Unpaid Principal Balance And Fair Value Of Variable Interest Entity Debt DifferenceBetweenAggregateUnpaidPrincipalBalanceAndFairValueOfVariableInterestEntityDebt	253000000	usd
CY2024Q1	afg	Carrying Amount Of Variable Interest Entity Loans In Default CarryingAmountOfVariableInterestEntityLoansInDefault	1000000	usd
CY2023Q4	afg	Carrying Amount Of Variable Interest Entity Loans In Default CarryingAmountOfVariableInterestEntityLoansInDefault	7000000	usd
CY2024Q1	afg	Aggregateunpaidprincipalbalanceofvariableinterestentityloansindefault Aggregateunpaidprincipalbalanceofvariableinterestentityloansindefault	5000000	usd
CY2023Q4	afg	Aggregateunpaidprincipalbalanceofvariableinterestentityloansindefault Aggregateunpaidprincipalbalanceofvariableinterestentityloansindefault	13000000	usd
CY2024Q1	us-gaap	Goodwill Period Increase Decrease GoodwillPeriodIncreaseDecrease	0	usd
CY2024Q1	us-gaap	Goodwill Goodwill	305000000	usd
CY2024Q1	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	208000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Net FiniteLivedIntangibleAssetsNet	213000000	usd
CY2024Q1	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	44000000	usd
CY2023Q4	us-gaap	Finite Lived Intangible Assets Accumulated Amortization FiniteLivedIntangibleAssetsAccumulatedAmortization	39000000	usd
CY2024Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	5000000	usd
CY2023Q1	us-gaap	Amortization Of Intangible Assets AmortizationOfIntangibleAssets	3000000	usd
CY2024Q1	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1498000000	usd
CY2024Q1	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	23000000	usd
CY2024Q1	us-gaap	Long Term Debt LongTermDebt	1475000000	usd
CY2023Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1498000000	usd
CY2023Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	23000000	usd
CY2023Q4	us-gaap	Long Term Debt LongTermDebt	1475000000	usd
CY2024Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal Remainder Of Fiscal Year LongTermDebtMaturitiesRepaymentsOfPrincipalRemainderOfFiscalYear	0	usd
CY2024Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	0	usd
CY2024Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	0	usd
CY2024Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	0	usd
CY2024Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	0	usd
CY2024Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	0	usd
CY2024Q1	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	1500000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	6000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	1000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	5000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-5000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-1000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-4000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	11000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	2000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	9000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	-13000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	-3000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	-10000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-7000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-2000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-5000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	-6000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	-1000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	-5000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	0	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	0	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	0	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	0	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	5000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	1000000	usd
CY2024Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	4000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	78000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	17000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	61000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesBeforeTax	-29000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesTax	-6000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment From Aoci For Sale Of Securities Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentFromAOCIForSaleOfSecuritiesNetOfTax	-23000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Before Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentBeforeTax	107000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesTax	23000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Available For Sale Securities Adjustment Net Of Tax OtherComprehensiveIncomeLossAvailableForSaleSecuritiesAdjustmentNetOfTax	84000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAndTax	5000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationTax	1000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Before Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossBeforeReclassificationAfterTax	4000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationBeforeTax	-5000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationTax	-1000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss Reclassification After Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossReclassificationAfterTax	-4000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTax	10000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTax	2000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTax	8000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Net Of Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentNetOfTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	0	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	117000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	25000000	usd
CY2023Q1	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	92000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2024Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	304000000	usd
CY2023Q1	us-gaap	Operating Income Loss OperatingIncomeLoss	264000000	usd
CY2024Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	64000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2023Q1	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	55000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.21
CY2024Q1	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	2000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	0.01
CY2023Q1	us-gaap	Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends IncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	3000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends EffectiveIncomeTaxRateReconciliationDeductionsEmployeeStockOwnershipPlanDividends	0.01
CY2024Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-2000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.01
CY2023Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense Share Based Compensation Cost IncomeTaxReconciliationNondeductibleExpenseShareBasedCompensationCost	-2000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense Share Based Compensation Cost EffectiveIncomeTaxRateReconciliationNondeductibleExpenseShareBasedCompensationCost	-0.01
CY2024Q1	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0
CY2023Q1	us-gaap	Income Tax Reconciliation Tax Exempt Income IncomeTaxReconciliationTaxExemptIncome	1000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation Tax Exempt Income EffectiveIncomeTaxRateReconciliationTaxExemptIncome	0
CY2024Q1	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	0	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0
CY2023Q1	us-gaap	Income Tax Reconciliation Deductions Dividends IncomeTaxReconciliationDeductionsDividends	1000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation Deductions Dividends EffectiveIncomeTaxRateReconciliationDeductionsDividends	0
CY2024Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	2000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.01
CY2023Q1	us-gaap	Income Tax Reconciliation Nondeductible Expense IncomeTaxReconciliationNondeductibleExpense	3000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation Nondeductible Expense EffectiveIncomeTaxRateReconciliationNondeductibleExpense	0.01
CY2024Q1	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	0	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0
CY2023Q1	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	2000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation Foreign Income Tax Rate Differential EffectiveIncomeTaxRateReconciliationForeignIncomeTaxRateDifferential	0.01
CY2024Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	1000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	0
CY2023Q1	us-gaap	Income Tax Reconciliation Other Adjustments IncomeTaxReconciliationOtherAdjustments	-1000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Reconciliation Other Adjustments EffectiveIncomeTaxRateReconciliationOtherAdjustments	-0.01
CY2024Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	62000000	usd
CY2024Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.20
CY2023Q1	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	52000000	usd
CY2023Q1	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.20
CY2024Q1	us-gaap	Schedule Of Liability For Unpaid Claims And Claims Adjustment Expense ScheduleOfLiabilityForUnpaidClaimsAndClaimsAdjustmentExpense	The following table provides an analysis of changes in the liability for losses and loss adjustment expenses during the first three months of 2024 and 2023 (in millions):<div style="margin-top:5pt"><table style="border-collapse:collapse;display:inline-table;margin-bottom:5pt;vertical-align:text-bottom;width:100.000%"><tr><td style="width:1.0%"></td><td style="width:71.707%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.204%"></td><td style="width:0.1%"></td><td style="width:0.1%"></td><td style="width:0.384%"></td><td style="width:0.1%"></td><td style="width:1.0%"></td><td style="width:12.205%"></td><td style="width:0.1%"></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="9" style="padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">Three months ended March 31,</span></td></tr><tr><td colspan="3" style="padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">2024</span></td><td colspan="3" style="border-top:1pt solid #000000;padding:0 1pt"></td><td colspan="3" style="border-top:1pt solid #000000;padding:2px 1pt;text-align:center;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:8.5pt;font-weight:400;line-height:100%">2023</span></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Balance at beginning of year</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">13,087 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">11,974 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Less reinsurance recoverables, net of allowance</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">4,288 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3,767 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net liability at beginning of year</span></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">8,799 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">8,207 </span></td><td style="background-color:#cceeff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Provision for losses and LAE occurring in the current period</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">962 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">883 </span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td><td colspan="3" style="display:none"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><div><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net decrease in the provision for claims of prior years</span></div></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(50)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(63)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 25.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Total losses and LAE incurred</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">912 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">820 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Payments for losses and LAE of:</span></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Current year</span></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(94)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(66)</span></td><td style="background-color:#ffffff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt 2px 12.25pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Prior years</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(895)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(815)</span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt 2px 25.75pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Total payments</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(989)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">(881)</span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Foreign currency translation and other</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">1 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Net liability at end of period</span></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">8,723 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td colspan="2" style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">8,147 </span></td><td style="background-color:#ffffff;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#cceeff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Add back reinsurance recoverables, net of allowance</span></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">4,327 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#cceeff;padding:0 1pt"></td><td colspan="2" style="background-color:#cceeff;padding:2px 0 2px 1pt;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">3,614 </span></td><td style="background-color:#cceeff;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr><tr><td colspan="3" style="background-color:#ffffff;padding:2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">Gross unpaid losses and LAE included in the balance sheet at end of period</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">13,050 </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td><td colspan="3" style="background-color:#ffffff;padding:0 1pt"></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0 2px 1pt;text-align:left;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">$</span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 0;text-align:right;vertical-align:bottom"><span style="color:#000000;font-family:'Arial',sans-serif;font-size:9pt;font-weight:400;line-height:100%">11,761 </span></td><td style="background-color:#ffffff;border-bottom:3pt double #000000;border-top:1pt solid #000000;padding:2px 1pt 2px 0;text-align:right;vertical-align:bottom"></td></tr></table></div>
CY2023Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	4288000000	usd
CY2022Q4	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	3767000000	usd
CY2023Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	8799000000	usd
CY2022Q4	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	8207000000	usd
CY2024Q1	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	962000000	usd
CY2023Q1	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Current Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersCurrentYearClaimsAndClaimsAdjustmentExpense	883000000	usd
CY2024Q1	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-50000000	usd
CY2023Q1	us-gaap	Supplemental Information For Property Casualty Insurance Underwriters Prior Year Claims And Claims Adjustment Expense SupplementalInformationForPropertyCasualtyInsuranceUnderwritersPriorYearClaimsAndClaimsAdjustmentExpense	-63000000	usd
CY2024Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	912000000	usd
CY2023Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Incurred Claims1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseIncurredClaims1	820000000	usd
CY2024Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	94000000	usd
CY2023Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Current Year1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidCurrentYear1	66000000	usd
CY2024Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	895000000	usd
CY2023Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Claims Paid Prior Years1 LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseClaimsPaidPriorYears1	815000000	usd
CY2024Q1	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	989000000	usd
CY2023Q1	us-gaap	Payments For Losses And Loss Adjustment Expense PaymentsForLossesAndLossAdjustmentExpense	881000000	usd
CY2024Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	1000000	usd
CY2023Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Foreign Currency Translation Gain Loss LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseForeignCurrencyTranslationGainLoss	1000000	usd
CY2024Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	8723000000	usd
CY2023Q1	us-gaap	Liability For Unpaid Claims And Claims Adjustment Expense Net LiabilityForUnpaidClaimsAndClaimsAdjustmentExpenseNet	8147000000	usd
CY2024Q1	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	4327000000	usd
CY2023Q1	us-gaap	Reinsurance Recoverable For Unpaid Claims And Claims Adjustments ReinsuranceRecoverableForUnpaidClaimsAndClaimsAdjustments	3614000000	usd
CY2023Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	10000000	usd
CY2022Q4	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	8000000	usd
CY2023Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	15000000	usd
CY2022Q4	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	8000000	usd
CY2024Q1	us-gaap	Reinsurance Recoverable Credit Loss Expense Reversal ReinsuranceRecoverableCreditLossExpenseReversal	0	usd
CY2023Q1	us-gaap	Reinsurance Recoverable Credit Loss Expense Reversal ReinsuranceRecoverableCreditLossExpenseReversal	1000000	usd
CY2024Q1	us-gaap	Premium Receivable Credit Loss Expense Reversal PremiumReceivableCreditLossExpenseReversal	0	usd
CY2023Q1	us-gaap	Premium Receivable Credit Loss Expense Reversal PremiumReceivableCreditLossExpenseReversal	0	usd
CY2024Q1	us-gaap	Reinsurance Loss On Uncollectible Accounts In Period Amount ReinsuranceLossOnUncollectibleAccountsInPeriodAmount	0	usd
CY2023Q1	us-gaap	Reinsurance Loss On Uncollectible Accounts In Period Amount ReinsuranceLossOnUncollectibleAccountsInPeriodAmount	0	usd
CY2024Q1	us-gaap	Premiums Receivable Allowance For Doubtful Accounts Write Offs Against Allowance PremiumsReceivableAllowanceForDoubtfulAccountsWriteOffsAgainstAllowance	0	usd
CY2023Q1	us-gaap	Premiums Receivable Allowance For Doubtful Accounts Write Offs Against Allowance PremiumsReceivableAllowanceForDoubtfulAccountsWriteOffsAgainstAllowance	0	usd
CY2024Q1	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	10000000	usd
CY2023Q1	us-gaap	Reinsurance Recoverables Allowance ReinsuranceRecoverablesAllowance	9000000	usd
CY2024Q1	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	15000000	usd
CY2023Q1	us-gaap	Premiums Receivable Allowance For Doubtful Accounts PremiumsReceivableAllowanceForDoubtfulAccounts	8000000	usd
CY2024Q1	ecd	Non Rule10b51 Arr Adopted Flag NonRule10b51ArrAdoptedFlag	false
CY2024Q1	ecd	Rule10b51 Arr Adopted Flag Rule10b51ArrAdoptedFlag	false
CY2024Q1	ecd	Non Rule10b51 Arr Trmntd Flag NonRule10b51ArrTrmntdFlag	false
CY2024Q1	ecd	Rule10b51 Arr Trmntd Flag Rule10b51ArrTrmntdFlag	false

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0001042046-24-000012-index-headers.html	Edgar Link	pending
0001042046-24-000012-index.html	Edgar Link	pending
0001042046-24-000012.txt	Edgar Link	pending
0001042046-24-000012-xbrl.zip	Edgar Link	pending
afg-20240331.htm	Edgar Link	pending
afg-20240331.xsd	Edgar Link	pending
afg-20240331_g1.jpg	Edgar Link	pending
afg-2024331xex31a.htm	Edgar Link	pending
afg-2024331xex31b.htm	Edgar Link	pending
afg-2024331xex31c.htm	Edgar Link	pending
afg-2024331xex32.htm	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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afg-20240331_cal.xml	Edgar Link	unprocessable
afg-20240331_def.xml	Edgar Link	unprocessable
afg-20240331_lab.xml	Edgar Link	unprocessable
afg-20240331_pre.xml	Edgar Link	unprocessable
FilingSummary.xml	Edgar Link	unprocessable
afg-20240331_htm.xml	Edgar Link	completed
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$AFG
AMERICAN FINANCIAL GROUP INC Stock $afg

2024 Q2 Form 10-Q Financial Statement

#000104204624000012 Filed on May 03, 2024

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$AFG AMERICAN FINANCIAL GROUP INC Stock $afg

2024 Q2 Form 10-Q Financial Statement

#000104204624000012 Filed on May 03, 2024

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$AFG
AMERICAN FINANCIAL GROUP INC Stock $afg