Condensed Consolidated Statements Of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Revenues:
Premiums	$ 13,650	$ 13,212	$ 27,090	$ 26,460
Services	262	407	522	897
Investment income	95	113	195	208
Total revenues	14,007	13,732	27,807	27,565
Operating expenses:
Benefits	11,509	11,252	22,906	22,257
Operating costs	1,726	1,817	3,494	3,762
Depreciation and amortization	89	90	177	183
Total operating expenses	13,324	13,159	26,577	26,202
Income from operations	683	573	1,230	1,363
Gain on sale of business	0	267	0	267
Interest expense	47	47	94	93
Income before income taxes	636	793	1,136	1,537
Provision for income taxes	325	362	571	676
Net income	$ 311	$ 431	$ 565	$ 861
Basic earnings per common share (in dollars per share)	$ 2.08	$ 2.88	$ 3.79	$ 5.74
Diluted earnings per common share (in dollars per share)	2.06	2.85	3.75	5.67
Dividends per common share (in dollars per share)	$ 0.29	$ 0.29	$ 0.58	$ 0.57