Condensed Consolidated Statements Of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Revenues:
Premiums	$ 13,212	$ 11,584	$ 26,460	$ 22,667
Services	407	546	897	1,084
Investment income	113	92	208	183
Total revenues	13,732	12,222	27,565	23,934
Operating expenses:
Benefits	11,252	9,627	22,257	18,751
Operating costs	1,817	1,835	3,762	3,620
Depreciation and amortization	90	79	183	161
Total operating expenses	13,159	11,541	26,202	22,532
Income from operations	573	681	1,363	1,402
Gain on sale of business	267	0	267	0
Interest expense	47	35	93	70
Income before income taxes	793	646	1,537	1,332
Provision for income taxes	362	302	676	620
Net income	$ 431	$ 344	$ 861	$ 712
Basic earnings per common share (in dollars per share)	$ 2.88	$ 2.22	$ 5.74	$ 4.59
Diluted earnings per common share (in dollars per share)	2.85	2.19	5.67	4.54
Dividends per common share (in dollars per share)	$ 0.29	$ 0.28	$ 0.57	$ 0.55