CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Revenues
Property-liability insurance premiums	$ 6,972	$ 6,697	$ 20,604	$ 19,993
Life and annuity premiums and contract charges	584	563	1,742	1,675
Net investment income	950	940	2,917	2,977
Realized capital gains and losses:
Total other-than-temporary impairment losses	(96)	(39)	(178)	(195)
Portion of loss recognized in other comprehensive income	8	(7)	(7)	16
Net other-than-temporary impairment losses recognized in earnings	(88)	(46)	(185)	(179)
Sales and other realized capital gains and losses	47	(26)	637	302
Total realized capital gains and losses	(41)	(72)	452	123
Total revenues	8,465	8,128	25,715	24,768
Costs and expenses
Property-liability insurance claims and claims expense	4,427	4,293	13,628	13,442
Life and annuity contract benefits	498	453	1,427	1,354
Interest credited to contractholder funds	317	215	973	959
Amortization of deferred policy acquisition costs	1,026	1,016	2,933	2,937
Operating costs and expenses	937	1,010	3,129	3,023
Restructuring and related charges	13	9	59	25
Loss on extinguishment of debt	9		489
Interest expense	83	93	280	281
Total costs and expenses	7,310	7,089	22,918	22,021
(Loss) gain on disposition of operations	(646)	9	(644)	15
Income from operations before income tax expense	509	1,048	2,153	2,762
Income tax expense	193	325	694	850
Net income	316	723	1,459	1,912
Preferred stock dividends	6		6
Net income available to common shareholders	$ 310	$ 723	$ 1,453	$ 1,912
Earnings per common share:
Net income available to common shareholders per common share - Basic (in dollars per share)	$ 0.67	$ 1.49	$ 3.10	$ 3.89
Weighted average common shares - Basic (in shares)	461.1	485.9	468.2	491.5
Net income available to common shareholders per common share - Diluted (in dollars per share)	$ 0.66	$ 1.48	$ 3.07	$ 3.86
Weighted average common shares - Diluted (in shares)	467.1	489.9	473.8	494.7
Cash dividends declared per common share (in dollars per share)	$ 0.25	$ 0.22	$ 0.75	$ 0.66