Condensed Consolidated Statements of Operations - USD ($) shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Revenues
Net investment income	$ 824	$ 897	$ 1,610	$ 1,645
Realized capital gains and losses:
Total other-than-temporary impairment (“OTTI”) losses	(4)	(47)	(4)	(109)
OTTI losses reclassified (from) to other comprehensive income	0	(3)	(1)	0
Net OTTI losses recognized in earnings	(4)	(50)	(5)	(109)
Sales and valuation changes on equity investments and derivatives	(21)	131	(154)	324
Total realized capital gains and losses	(25)	81	(159)	215
Total revenues	10,099	9,813	19,869	19,457
Costs and expenses
Property and casualty insurance claims and claims expense	5,792	5,689	10,941	11,105
Life contract benefits	483	486	987	960
Interest credited to contractholder funds	165	175	326	348
Amortization of deferred policy acquisition costs	1,296	1,176	2,569	2,345
Operating costs and expenses	1,407	1,312	2,762	2,619
Restructuring and related charges	27	53	49	63
Interest expense	86	83	169	168
Total costs and expenses	9,256	8,974	17,803	17,608
Gain on disposition of operations	2	12	3	14
Income from operations before income tax expense	845	851	2,069	1,863
Income tax expense	169	272	418	589
Net income	676	579	1,651	1,274
Preferred stock dividends	39	29	68	58
Net income applicable to common shareholders	$ 637	$ 550	$ 1,583	$ 1,216
Earnings per common share:
Net income available to common shareholders per common share - Basic (in dollars per share)	$ 1.82	$ 1.51	$ 4.50	$ 3.34
Weighted average common shares - Basic (in shares)	349.2	363.6	351.6	364.6
Net income available to common shareholders per common share - Diluted (in dollars per share)	$ 1.80	$ 1.49	$ 4.43	$ 3.29
Weighted average common shares - Diluted (in shares)	354.6	369.0	357.2	370.1
Cash dividends declared per common share (in dollars per share)	$ 0.46	$ 0.37	$ 0.92	$ 0.74
Property and casualty insurance premiums
Revenues
Other revenue	$ 8,460	$ 8,018	$ 16,746	$ 15,977
Life premiums and contract charges
Revenues
Other revenue	612	591	1,228	1,184
Other revenue
Revenues
Other revenue	$ 228	$ 226	$ 444	$ 436