CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011
Revenues
Property-liability insurance premiums	$ 6,697	$ 6,432	$ 19,993	$ 19,337
Life and annuity premiums and contract charges	563	552	1,675	1,668
Net investment income	940	994	2,977	2,996
Realized capital gains and losses:
Total other-than-temporary impairment losses	(39)	(197)	(195)	(435)
Portion of loss recognized in other comprehensive income	(7)	(6)	16	(37)
Net other-than-temporary impairment losses recognized in earnings	(46)	(203)	(179)	(472)
Sales and other realized capital gains and losses	(26)	467	302	889
Total realized capital gains and losses	(72)	264	123	417
Total revenues	8,128	8,242	24,768	24,418
Costs and expenses
Property-liability insurance claims and claims expense	4,293	5,132	13,442	15,963
Life and annuity contract benefits	453	455	1,354	1,331
Interest credited to contractholder funds	215	405	959	1,240
Amortization of deferred policy acquisition costs	1,016	1,046	2,937	2,990
Operating costs and expenses	1,010	888	3,023	2,656
Restructuring and related charges	9	8	25	28
Interest expense	93	92	281	275
Total costs and expenses	7,089	8,026	22,021	24,483
Gain (loss) on disposition of operations	9	3	15	(10)
Income (loss) from operations before income tax expense (benefit)	1,048	219	2,762	(75)
Income tax expense (benefit)	325	44	850	(150)
Net income	$ 723	$ 175	$ 1,912	$ 75
Earnings per share:
Net income per share - Basic (in dollars per share)	$ 1.49	$ 0.34	$ 3.89	$ 0.14
Weighted average shares - Basic (in shares)	485.9	512.0	491.5	520.4
Net income per share - Diluted (in dollars per share)	$ 1.48	$ 0.34	$ 3.86	$ 0.14
Weighted average shares - Diluted (in shares)	489.9	514.2	494.7	522.9
Cash dividends declared per share (in dollars per share)	$ 0.22	$ 0.21	$ 0.66	$ 0.63