Condensed Consolidated Statements Of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities
Net income	$ 861	$ 712
Adjustments to reconcile net income to net cash (used in) provided by operating activities:
Gain on sale of business	(267)	0
Net realized capital gains	(37)	(3)
Stock-based compensation	69	55
Depreciation	178	157
Other intangible amortization	50	56
Benefit for deferred income taxes	(28)	(39)
Changes in operating assets and liabilities, net of effect of businesses acquired and dispositions:
Receivables	(1,087)	(1,137)
Other assets	(1,437)	(914)
Benefits payable	306	885
Other liabilities	923	641
Unearned revenues	(70)	42
Other, net	38	16
Net cash (used in) provided by operating activities	(501)	471
Cash flows from investing activities
Proceeds from sale of business	1,055	72
Acquisitions, net of cash acquired	(38)	(3)
Purchases of property and equipment	(259)	(216)
Purchases of investment securities	(1,721)	(968)
Maturities of investment securities	615	512
Proceeds from sales of investment securities	1,570	1,007
Net cash provided by investing activities	1,222	404
Cash flows from financing activities
Receipts (withdrawals) from contract deposits, net	(259)	(127)
Proceeds from issuance of commercial paper, net	300	0
Change in book overdraft	(25)	(109)
Common stock repurchases	(371)	(152)
Dividends paid	(86)	(86)
Excess tax benefit from stock-based compensation	14	9
Proceeds from stock option exercises and other	21	45
Net cash used in financing activities	(406)	(420)
Increase in cash and cash equivalents	315	455
Cash and cash equivalents at beginning of period	1,935	1,138
Cash and cash equivalents at end of period	2,250	1,593
Supplemental cash flow disclosures:
Interest payments	95	73
Income tax payments, net	$ 736	$ 601