Condensed Consolidated Statements Of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014
Revenues:
Premiums	$ 12,987	$ 11,607	$ 39,447	$ 34,274
Services	246	536	1,143	1,620
Investment income	130	95	338	278
Total revenues	13,363	12,238	40,928	36,172
Operating expenses:
Benefits	10,896	9,666	33,153	28,417
Operating costs	1,688	1,898	5,450	5,518
Depreciation and amortization	84	85	267	246
Total operating expenses	12,668	11,649	38,870	34,181
Income from operations	695	589	2,058	1,991
Gain on sale of business	0	0	267	0
Interest expense	47	38	140	108
Income before income taxes	648	551	2,185	1,883
Provision for income taxes	334	261	1,010	881
Net income	$ 314	$ 290	$ 1,175	$ 1,002
Basic earnings per common share (in dollars per share)	$ 2.11	$ 1.87	$ 7.85	$ 6.46
Diluted earnings per common share (in dollars per share)	2.09	1.85	7.77	6.39
Dividends per common share (in dollars per share)	$ 0.29	$ 0.28	$ 0.86	$ 0.83