Investments (Details 4) (USD $) In Millions, unless otherwise specified	Jun. 30, 2014		Mar. 31, 2014		Dec. 31, 2013		Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012
Unrealized gain on:
Pretax	$ 1,261				$ 880
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(456)				(317)
Net	805	[1]	685	[1]	563	[1]	600	865	823
Fixed maturities - annuity segment [Member]
Unrealized gain on:
Pretax	1,188	[2]			729	[2]
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(416)	[2]			(255)	[2]
Net	772	[2]			474	[2]
Fixed maturities - all other [Member]
Unrealized gain on:
Pretax	513				361
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(190)				(133)
Net	323				228
Equity securities [Member]
Unrealized gain on:
Pretax	235				192
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(86)				(70)
Net	149				122
Deferred policy acquisition costs - annuity segment [Member]
Unrealized gain on:
Pretax	(551)				(345)
Deferred Tax and Amounts Attributable to Noncontrolling Interests	193				121
Net	(358)				(224)
Annuity benefits accumulated [Member]
Unrealized gain on:
Pretax	(117)				(71)
Deferred Tax and Amounts Attributable to Noncontrolling Interests	41				25
Net	(76)				(46)
Life, accident and health reserves [Member]
Unrealized gain on:
Pretax	(41)				(8)
Deferred Tax and Amounts Attributable to Noncontrolling Interests	14				3
Net	(27)				(5)
Unearned revenue [Member]
Unrealized gain on:
Pretax	34				22
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(12)				(8)
Net	$ 22				$ 14

[1] Includes net unrealized gains of $60 million at June 30, 2014, $58 million at March 31, 2014 and $54 million at December 31, 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.