Condensed Consolidated Statements Of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Revenues:
Premiums	$ 13,440	$ 13,248
Services	260	490
Investment income	100	95
Total revenues	13,800	13,833
Operating expenses:
Benefits	11,397	11,005
Operating costs	1,768	1,945
Depreciation and amortization	88	93
Total operating expenses	13,253	13,043
Income from operations	547	790
Interest expense	47	46
Income before income taxes	500	744
Provision for income taxes	266	314
Net income	$ 234	$ 430
Basic earnings per common share (in dollars per share)	$ 1.57	$ 2.86
Diluted earnings per common share (in dollars per share)	1.56	2.82
Dividends per common share (in dollars per share)	$ 0.29	$ 0.28