CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Property-liability insurance premiums (net of reinsurance ceded of $1,006, $1,030 and $1,069)	$ 30,309	$ 28,929	$ 27,618
Life and annuity premiums and contract charges (net of reinsurance ceded of $332, $416 and $639)	2,158	2,157	2,352
Net investment income	3,156	3,459	3,943
Realized capital gains and losses:
Total other-than-temporary impairment (“OTTI”) losses	(452)	(242)	(207)
OTTI losses reclassified to (from) other comprehensive income	36	(3)	(8)
Net OTTI losses recognized in earnings	(416)	(245)	(215)
Sales and other realized capital gains and losses	446	939	809
Total realized capital gains and losses	30	694	594
Revenues	35,653	35,239	34,507
Costs and expenses
Property-liability insurance claims and claims expense (net of reinsurance ceded of $602, $1,393 and $1,717)	21,034	19,428	17,911
Life and annuity contract benefits (net of reinsurance ceded of $219, $356 and $355)	1,803	1,765	1,917
Interest credited to contractholder funds (net of reinsurance ceded of $25, $26 and $27)	761	919	1,278
Amortization of deferred policy acquisition costs	4,364	4,135	4,002
Operating costs and expenses	4,081	4,341	4,387
Restructuring and related charges	39	18	70
Loss on extinguishment of debt	0	1	491
Interest expense	292	322	367
Total costs and expenses	32,374	30,929	30,423
Gain (loss) on disposition of operations	3	(74)	(688)
Income from operations before income tax expense	3,282	4,236	3,396
Income tax expense	1,111	1,386	1,116
Net income	2,171	2,850	2,280
Preferred stock dividends	116	104	17
Net income applicable to common shareholders	$ 2,055	$ 2,746	$ 2,263
Earnings per common share:
Net income applicable to common shareholders earnings per common share - Basic (in dollars per share)	$ 5.12	$ 6.37	$ 4.87
Weighted average common shares - Basic (in shares)	401.1	431.4	464.4
Net income applicable to common shareholders earnings per common share - Diluted (in dollars per share)	$ 5.05	$ 6.27	$ 4.81
Weighted average common shares - Diluted (in shares)	406.8	438.2	470.3
Cash dividends declared per common share (in dollars per share)	$ 1.20	$ 1.12	$ 1.00