Condensed Consolidated Statements Of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013
Cash flows from operating activities
Net income	$ 1,002	$ 1,261
Adjustments to reconcile net income to net cash provided by operating activities:
Net realized capital gains	(9)	(14)
Stock-based compensation	76	73
Depreciation and amortization	325	312
(Benefit) provision for deferred income taxes	(30)	31
Changes in operating assets and liabilities, net of effect of businesses acquired and dispositions:
Receivables	(68)	(89)
Other assets	(960)	(165)
Benefits payable	783	287
Other liabilities	238	24
Unearned revenues	40	(32)
Other, net	28	44
Net cash provided by operating activities	1,425	1,732
Cash flows from investing activities
Acquisitions, net of cash acquired	(3)	(161)
Proceeds from sale of business	72	33
Purchases of property and equipment	(361)	(310)
Purchases of investment securities	(1,949)	(2,665)
Maturities of investment securities	702	853
Proceeds from sales of investment securities	1,171	1,107
Net cash used in investing activities	(368)	(1,143)
Cash flows from financing activities
Receipts (withdrawals) from contract deposits, net	(743)	(201)
Proceeds from issuance of senior notes, net	1,733	0
Change in book overdraft	(136)	(51)
Common stock repurchases	(270)	(325)
Dividends paid	(129)	(125)
Excess tax benefit from stock-based compensation	10	6
Proceeds from stock option exercises and other	45	56
Net cash provided by (used in) financing activities	510	(640)
Increase (decrease) in cash and cash equivalents	1,567	(51)
Cash and cash equivalents at beginning of period	1,138	1,306
Cash and cash equivalents at end of period	2,705	1,255
Supplemental cash flow disclosures:
Interest payments	83	82
Income tax payments, net	$ 852	$ 724