Investments (Details 4) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014		Jun. 30, 2014		Dec. 31, 2013		Sep. 30, 2013	Jun. 30, 2013	Dec. 31, 2012
Unrealized gain on:
Pretax	$ 1,136				$ 880
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(410)				(317)
Net	726	[1]	805	[1]	563	[1]	568	600	823
Fixed maturities - annuity segment [Member]
Unrealized gain on:
Pretax	1,077	[2]			729	[2]
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(377)	[2]			(255)	[2]
Net	700	[2]			474	[2]
Fixed maturities - all other [Member]
Unrealized gain on:
Pretax	479				361
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(177)				(133)
Net	302				228
Equity securities [Member]
Unrealized gain on:
Pretax	195				192
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(71)				(70)
Net	124				122
Deferred policy acquisition costs - annuity segment [Member]
Unrealized gain on:
Pretax	(496)				(345)
Deferred Tax and Amounts Attributable to Noncontrolling Interests	174				121
Net	(322)				(224)
Annuity benefits accumulated [Member]
Unrealized gain on:
Pretax	(108)				(71)
Deferred Tax and Amounts Attributable to Noncontrolling Interests	38				25
Net	(70)				(46)
Life, accident and health reserves [Member]
Unrealized gain on:
Pretax	(41)				(8)
Deferred Tax and Amounts Attributable to Noncontrolling Interests	13				3
Net	(28)				(5)
Unearned revenue [Member]
Unrealized gain on:
Pretax	30				22
Deferred Tax and Amounts Attributable to Noncontrolling Interests	(10)				(8)
Net	$ 20				$ 14

[1] Includes net unrealized gains of $60 million at both September 30, 2014 and June 30, 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.