Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Revenues
Premiums	$ 8,010	$ 7,654	$ 16,113	$ 15,400
Fees and other revenues	1,192	1,197	2,415	2,398
Net investment income	308	294	611	566
Mail order pharmacy revenues	757	748	1,467	1,445
Realized investment gains (losses):
Other-than-temporary impairments on fixed maturities	(2)	(3)	(9)	(30)
Other realized investment gains (losses), net	53	70	106	65
Net realized investment gains (losses)	51	67	97	35
Total revenues	10,318	9,960	20,703	19,844
Benefits and Expenses
Global Health Care medical costs	4,924	4,777	9,909	9,538
Other benefit expenses	1,335	1,414	2,702	2,782
Mail order pharmacy costs	626	630	1,207	1,204
Other operating expenses	2,271	2,289	4,801	4,610
Amortization of other acquired intangible assets, net	28	37	60	78
Total benefits and expenses	9,184	9,147	18,679	18,212
Income before Income Taxes	1,134	813	2,024	1,632
Income taxes (benefits):
Current	304	338	590	632
Deferred	20	(28)	31	(17)
Total income taxes	324	310	621	615
Net Income	810	503	1,403	1,017
Less: Net Income (Loss) Attributable to Noncontrolling Interests	(3)	(7)	(8)	(12)
Shareholders' Net Income	$ 813	$ 510	$ 1,411	$ 1,029
Shareholders' Net Income Per Share:
Basic	$ 3.2	$ 2	$ 5.54	$ 4.03
Diluted	3.15	1.97	5.45	3.97
Dividends Declared Per Share	$ 0	$ 0	$ 0.04	$ 0.04