Investments (Details 4) - USD ($) $ in Millions		Dec. 31, 2015		Dec. 31, 2014		Dec. 31, 2013	[1]	Dec. 31, 2012
Unrealized gain on:
Pretax		$ 517		$ 1,162
Deferred Tax and Amounts Attributable to Noncontrolling Interests		(185)		(419)
Net		332	[1]	743	[1]	$ 563		$ 823
Fixed maturities - annuity segment [Member]
Unrealized gain on:
Pretax	[2]	523		1,157
Deferred Tax and Amounts Attributable to Noncontrolling Interests	[2]	(183)		(405)
Net	[2]	340		752
Fixed maturities - all other [Member]
Unrealized gain on:
Pretax		196		503
Deferred Tax and Amounts Attributable to Noncontrolling Interests		(72)		(185)
Net		124		318
Equity securities [Member]
Unrealized gain on:
Pretax		84		218
Deferred Tax and Amounts Attributable to Noncontrolling Interests		(30)		(79)
Net		54		139
Deferred policy acquisition costs - annuity segment [Member]
Unrealized gain on:
Pretax		(233)		(531)
Deferred Tax and Amounts Attributable to Noncontrolling Interests		82		186
Net		(151)		(345)
Annuity benefits accumulated [Member]
Unrealized gain on:
Pretax		(64)		(112)
Deferred Tax and Amounts Attributable to Noncontrolling Interests		22		39
Net		(42)		(73)
Life, accident and health reserves [Member]
Unrealized gain on:
Pretax				(104)
Deferred Tax and Amounts Attributable to Noncontrolling Interests				36
Net				(68)
Unearned revenue [Member]
Unrealized gain on:
Pretax		11		31
Deferred Tax and Amounts Attributable to Noncontrolling Interests		(4)		(11)
Net		$ 7		$ 20

[1] Includes net unrealized gains of $51 million at December 31, 2015 compared to net unrealized gains of $58 million and $54 million at December 31, 2014 and 2013, related to securities for which only the credit portion of an other-than-temporary impairment has been recorded in earnings.

[2] Unrealized gains on fixed maturity investments supporting AFG’s annuity benefits accumulated.