Condensed Consolidated Statements Of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Revenues:
Premiums	$ 13,371	$ 12,987	$ 40,461	$ 39,447
Services	227	246	749	1,143
Investment income	96	130	291	338
Total revenues	13,694	13,363	41,501	40,928
Operating expenses:
Benefits	10,900	10,896	33,806	33,153
Operating costs	1,759	1,688	5,253	5,450
Depreciation and amortization	86	84	263	267
Total operating expenses	12,745	12,668	39,322	38,870
Income from operations	949	695	2,179	2,058
Gain on sale of business	0	0	0	267
Interest expense	47	47	141	140
Income before income taxes	902	648	2,038	2,185
Provision for income taxes	452	334	1,023	1,010
Net income	$ 450	$ 314	$ 1,015	$ 1,175
Basic earnings per common share (in dollars per share)	$ 3.01	$ 2.11	$ 6.80	$ 7.85
Diluted earnings per common share (in dollars per share)	2.98	2.09	6.73	7.77
Dividends per common share (in dollars per share)	$ 0.29	$ 0.29	$ 0.87	$ 0.86