Consolidated Statements of Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Revenues
Premiums	$ 29,642	$ 27,214	$ 25,575
Fees and other revenues	4,488	4,141	3,601
Net investment income	1,153	1,166	1,164
Mail order pharmacy revenues	2,536	2,239	1,827
Realized investment gains (losses):
Other-than-temporary impairments on debt securities	(112)	(36)	(11)
Other realized investment gains	169	190	224
Net realized investment gains	57	154	213
Total revenues	37,876	34,914	32,380
Benefits and Expenses
Global Health Care medical costs	18,354	16,694	15,867
Other benefit expenses	4,936	4,640	4,998
Mail order pharmacy costs	2,134	1,907	1,509
Other operating expenses	8,982	8,174	7,595
Amortization of other acquired intangible assets, net	143	195	235
Total benefits and expenses	34,549	31,610	30,204
Income before Income Taxes	3,327	3,304	2,176
Income taxes (benefits):
Current	1,229	1,232	501
Deferred	21	(22)	197
Total income taxes	1,250	1,210	698
Net Income	2,077	2,094	1,478
Less: Net Income (Loss) Attributable to Noncontrolling Interests	(17)	(8)	2
Shareholders' Net Income	$ 2,094	$ 2,102	$ 1,476
Shareholders' Net Income Per Share:
Basic	$ 8.17	$ 7.97	$ 5.28
Diluted	8.04	7.83	5.18
Dividends Declared Per Share	$ 0.04	$ 0.04	$ 0.04