Condensed Financial Information of Parent Company - Condensed Statement of Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Revenues:
Total revenues	$ 6,552	$ 5,769	$ 6,213
Costs and Expenses:
Interest charges on other borrowings	94	88	68
Other expenses	264	279	276
Total costs and expenses	5,217	5,430	5,579
Earnings from continuing operations before income taxes	1,335	339	634
Provision for income taxes	254	25	143
Net Earnings Attributable to Shareholders	1,995	732	897
AFG
Revenues:
Dividends from subsidiaries	835	543	417
Equity in undistributed earnings of subsidiaries	1,721	474	888
Investment and other income	29	32	20
Total revenues	2,585	1,049	1,325
Costs and Expenses:
Interest charges on intercompany borrowings	7	8	8
Interest charges on other borrowings	94	88	68
Other expenses	129	94	113
Total costs and expenses	230	190	189
Earnings from continuing operations before income taxes	2,355	859	1,136
Provision for income taxes	360	127	239
Net Earnings Attributable to Shareholders	$ 1,995	$ 732	$ 897