CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
Revenues
Property-liability insurance premiums (net of reinsurance ceded of $987, $1,006 and $1,030)	$ 31,307	$ 30,309	$ 28,929
Life and annuity premiums and contract charges (net of reinsurance ceded of $309, $332 and $416)	2,275	2,158	2,157
Net investment income	3,042	3,156	3,459
Realized capital gains and losses:
Total other-than-temporary impairment (“OTTI”) losses	(313)	(452)	(242)
OTTI losses reclassified to (from) other comprehensive income	10	36	(3)
Net OTTI losses recognized in earnings	(303)	(416)	(245)
Sales and other realized capital gains and losses	213	446	939
Total realized capital gains and losses	(90)	30	694
Revenues	36,534	35,653	35,239
Costs and expenses
Property-liability insurance claims and claims expense (net of reinsurance ceded of $1,116, $602 and $1,393)	22,221	21,034	19,428
Life and annuity contract benefits (net of reinsurance ceded of $208, $219 and $356)	1,857	1,803	1,765
Interest credited to contractholder funds (net of reinsurance ceded of $26, $25 and $26)	726	761	919
Amortization of deferred policy acquisition costs	4,550	4,364	4,135
Operating costs and expenses	4,106	4,081	4,341
Restructuring and related charges	30	39	18
Loss on extinguishment of debt	0	0	1
Interest expense	295	292	322
Total costs and expenses	33,785	32,374	30,929
Gain (loss) on disposition of operations	5	3	(74)
Income from operations before income tax expense	2,754	3,282	4,236
Income tax expense	877	1,111	1,386
Net income	1,877	2,171	2,850
Preferred stock dividends	116	116	104
Net income applicable to common shareholders	$ 1,761	$ 2,055	$ 2,746
Earnings per common share:
Net income applicable to common shareholders earnings per common share - Basic (in dollars per share)	$ 4.72	$ 5.12	$ 6.37
Weighted average common shares - Basic (in shares)	372.8	401.1	431.4
Net income applicable to common shareholders earnings per common share - Diluted (in dollars per share)	$ 4.67	$ 5.05	$ 6.27
Weighted average common shares - Diluted (in shares)	377.3	406.8	438.2
Cash dividends declared per common share (in dollars per share)	$ 1.32	$ 1.20	$ 1.12