Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Operating activities
Net earnings	$ 5,673	$ 5,526	$ 5,142
Noncash items:
Depreciation and amortization	1,375	1,309	1,124
Deferred income taxes	1	308	59
Share-based compensation	331	421	401
Other, net	(83)	(231)	(67)
Net change in other operating items, net of effects from acquisitions and changes in AARP balances:
Accounts receivable	(317)	(130)	(267)
Other assets	(838)	(295)	(121)
Medical costs payable	509	101	377
Accounts payable and other liabilities	459	199	146
Other policy liabilities	(221)	(81)	482
Unearned revenues	102	28	(308)
Cash flows from operating activities	6,991	7,155	6,968
Investing activities
Purchases of investments	(12,176)	(9,903)	(9,895)
Sales of investments	5,706	3,794	3,949
Maturities of investments	4,859	4,810	4,251
Cash paid for acquisitions, net of cash assumed	(362)	(6,280)	(1,844)
Cash received from dispositions	45	0	385
Purchases of property, equipment and capitalized software	(1,307)	(1,070)	(1,067)
Proceeds from disposal of property, equipment and capitalized software	146	0	49
Cash flows used for investing activities	(3,089)	(8,649)	(4,172)
Financing activities
Acquisition of noncontrolling interest	(1,474)	(319)	0
Common stock repurchases	(3,170)	(3,084)	(2,994)
Proceeds from issuance of long-term debt	2,235	3,966	2,234
Repayments of long-term debt	(1,609)	(986)	(955)
(Repayments of) proceeds from commercial paper, net	(474)	1,587	(933)
Cash dividends paid	(1,056)	(820)	(651)
Customer funds administered	31	(324)	37
Proceeds from common stock issuances	598	1,078	381
Interest rate swap termination	0	0	132
Other, net	(27)	(627)	259
Cash flows used for financing activities	(4,946)	471	(2,490)
Effect of exchange rate changes on cash and cash equivalents	(86)	0	0
Decrease in cash and cash equivalents	(1,130)	(1,023)	306
Cash and cash equivalents, beginning of period	8,406	9,429	9,123
Cash and Cash Equivalents, end of period	7,276	8,406	9,429
Supplemental cash flow disclosures
Cash paid for interest	724	600	472
Cash paid for income taxes	$ 2,785	$ 2,666	$ 2,739