CONSOLIDATED STATEMENTS OF OPERATIONS (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Revenues
Property-liability insurance premiums (net of reinsurance ceded of $1,030, $1,069 and $1,090)	$ 28,929	$ 27,618	$ 26,737
Life and annuity premiums and contract charges (net of reinsurance ceded of $416, $639 and $674)	2,157	2,352	2,241
Net investment income	3,459	3,943	4,010
Realized capital gains and losses:
Total other-than-temporary impairment ("OTTI") losses	(242)	(207)	(239)
OTTI losses reclassified to (from) other comprehensive income	(3)	(8)	6
Net OTTI losses recognized in earnings	(245)	(215)	(233)
Sales and other realized capital gains and losses	939	809	560
Total realized capital gains and losses	694	594	327
Total revenues	35,239	34,507	33,315
Costs and expenses
Property-liability insurance claims and claims expense (net of reinsurance ceded of $1,393, $1,717 and $2,051)	19,428	17,911	18,484
Life and annuity contract benefits (net of reinsurance ceded of $356, $355 and $665)	1,765	1,917	1,818
Interest credited to contractholder funds (net of reinsurance ceded of $26, $27 and $28)	919	1,278	1,316
Amortization of deferred policy acquisition costs	4,135	4,002	3,884
Operating costs and expenses	4,341	4,387	4,118
Restructuring and related charges	18	70	34
Loss on extinguishment of debt	1	491
Interest expense	322	367	373
Total costs and expenses	30,929	30,423	30,027
(Loss) gain on disposition of operations	(74)	(688)	18
Income from operations before income tax expense	4,236	3,396	3,306
Income tax expense	1,386	1,116	1,000
Net income	2,850	2,280	2,306
Preferred stock dividends	104	17
Net income available to common shareholders	$ 2,746	$ 2,263	$ 2,306
Earnings per common share:
Net income available to common shareholders per common share - Basic (in dollars per share)	$ 6.37	$ 4.87	$ 4.71
Weighted average common shares - Basic (in shares)	431.4	464.4	489.4
Net income available to common shareholders per common share - Diluted (in dollars per share)	$ 6.27	$ 4.81	$ 4.68
Weighted average common shares - Diluted (in shares)	438.2	470.3	493.0
Cash dividends declared per common share (in dollars per share)	$ 1.12	$ 1.00	$ 0.88