Condensed Consolidated Statements Of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Revenues:
Premiums	$ 13,398	$ 13,440
Services	253	260
Investment income	111	100
Total revenues	13,762	13,800
Operating expenses:
Benefits	11,326	11,397
Operating costs	1,553	1,734
Merger termination fee and related costs, net	(947)	34
Depreciation and amortization	92	88
Total operating expenses	12,024	13,253
Income from operations	1,738	547
Interest expense	49	47
Income before income taxes	1,689	500
Provision for income taxes	574	246
Net income	$ 1,115	$ 254
Basic earnings per common share (in dollars per share)	$ 7.54	$ 1.70
Diluted earnings per common share (in dollars per share)	7.49	1.68
Dividends per common share (in dollars per share)	$ 0.40	$ 0.29