Managed Investment Entities - Selected financial information related to CLOs (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Gains (losses) on change in fair value of assets/liabilities:
Assets	$ (15)	$ 32	$ (3)	$ 66
Liabilities	19	(32)	17	(70)
Management fees paid to AFG	3	4	6	8
Variable interest entity, primary beneficiary
Gains (losses) on change in fair value of assets/liabilities:
CLO earnings attributable to AFG	$ 9	$ 5	$ 23	$ 6