Condensed Financial Information of Parent Company - Condensed Statement of Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenues:
Total revenues	$ 7,040	$ 6,552	$ 5,769
Costs and Expenses:
Interest charges on other borrowings	85	94	88
Other expenses	255	264	279
Total costs and expenses	5,917	5,217	5,430
Earnings from continuing operations before income taxes	1,123	1,335	339
Provision for income taxes	225	254	25
Net Earnings Attributable to Shareholders	898	1,995	732
AFG
Revenues:
Dividends from subsidiaries	879	835	543
Equity in undistributed earnings of subsidiaries	405	1,721	474
Investment and other income	28	29	32
Total revenues	1,312	2,585	1,049
Costs and Expenses:
Interest charges on intercompany borrowings	7	7	8
Interest charges on other borrowings	85	94	88
Other expenses	97	129	94
Total costs and expenses	189	230	190
Earnings from continuing operations before income taxes	1,123	2,355	859
Provision for income taxes	225	360	127
Net Earnings Attributable to Shareholders	$ 898	$ 1,995	$ 732