CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues
Property-liability insurance premiums	$ 7,814	$ 7,549	$ 15,537	$ 14,975
Life and annuity premiums and contract charges	564	536	1,130	1,073
Net investment income	762	789	1,493	1,639
Realized capital gains and losses:
Total other-than-temporary impairment (“OTTI”) losses	(77)	(47)	(168)	(100)
OTTI losses reclassified to (from) other comprehensive income	(2)	4	8	8
Net OTTI losses recognized in earnings	(79)	(43)	(160)	(92)
Sales and other realized capital gains and losses	103	151	35	339
Total realized capital gains and losses	24	108	(125)	247
Total revenues	9,164	8,982	18,035	17,934
Costs and expenses
Property-liability insurance claims and claims expense	5,901	5,587	11,585	10,580
Life and annuity contract benefits	454	446	909	887
Interest credited to contractholder funds	185	185	375	384
Amortization of deferred policy acquisition costs	1,126	1,086	2,255	2,156
Operating costs and expenses	1,040	1,061	2,022	2,151
Restructuring and related charges	11	19	16	23
Interest expense	72	73	145	146
Costs and expenses	8,789	8,457	17,307	16,327
Gain on disposition of operations	1	1	3	0
Income from operations before income tax expense	376	526	731	1,607
Income tax expense	105	171	214	575
Net income	271	355	517	1,032
Preferred stock dividends	29	29	58	58
Net income applicable to common shareholders	$ 242	$ 326	$ 459	$ 974
Earnings per common share:
Net income available to common shareholders per common share - Basic (in dollars per share)	$ 0.65	$ 0.80	$ 1.22	$ 2.37
Weighted average common shares - Basic (in shares)	373.6	407.0	375.8	411.4
Net income available to common shareholders per common share - Diluted (in dollars per share)	$ 0.64	$ 0.79	$ 1.21	$ 2.33
Weighted average common shares - Diluted (in shares)	378.1	412.6	380.5	417.6
Cash dividends declared per common share (in dollars per share)	$ 0.33	$ 0.30	$ 0.66	$ 0.60