Managed Investment Entities (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Gains (losses) on change in fair value of assets/liabilities:
Assets	[1]	$ (7)	$ (1)	$ 26	$ (2)
Liabilities	[1]	5	(9)	(31)	(8)
Management fees paid to AFG		3	8	7	11
CLO earnings (losses) attributable to:
AFG shareholders	[2]	5	6	8	11
Noncontrolling interests	[2]	$ 0	$ (18)	$ 0	$ (18)

[1] Included in Revenues in AFG’s Statement of Earnings.

[2] Included in Earnings before income taxes in AFG’s Statement of Earnings.