CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011
Revenues
Property-liability insurance premiums	$ 6,666	$ 6,457	$ 13,296	$ 12,905
Life and annuity premiums and contract charges	559	547	1,112	1,116
Net investment income	1,026	1,020	2,037	2,002
Realized capital gains and losses:
Total other-than-temporary impairment losses	(69)	(82)	(156)	(238)
Portion of loss recognized in other comprehensive income	19	(4)	23	(31)
Net other-than-temporary impairment losses recognized in earnings	(50)	(86)	(133)	(269)
Sales and other realized capital gains and losses	77	143	328	422
Total realized capital gains and losses	27	57	195	153
Total revenues	8,278	8,081	16,640	16,176
Costs and expenses
Property-liability insurance claims and claims expense	4,810	6,355	9,149	10,831
Life and annuity contract benefits	462	422	901	876
Interest credited to contractholder funds	366	417	744	835
Amortization of deferred policy acquisition costs	942	960	1,921	1,944
Operating costs and expenses	996	868	2,013	1,768
Restructuring and related charges	10	11	16	20
Interest expense	93	91	188	183
Total costs and expenses	7,679	9,124	14,932	16,457
Gain (loss) on disposition of operations	3	7	6	(13)
Income (loss) from operations before income tax expense (benefit)	602	(1,036)	1,714	(294)
Income tax expense (benefit)	179	(412)	525	(194)
Net income (loss)	$ 423	$ (624)	$ 1,189	$ (100)
Earnings per share:
Net income (loss) per share - Basic (in dollars per share)	$ 0.86	$ (1.19)	$ 2.40	$ (0.19)
Weighted average shares - Basic (in shares)	490.6	523.1	494.9	528.2
Net income (loss) per share - Diluted (in dollars per share)	$ 0.86	$ (1.19)	$ 2.39	$ (0.19)
Weighted average shares - Diluted (in shares)	493.8	523.1	497.9	528.2
Cash dividends declared per share (in dollars per share)	$ 0.22	$ 0.21	$ 0.44	$ 0.42