Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Operating activities
Net earnings	$ 1,099	$ 1,240
Noncash items:
Depreciation and amortization	360	336
Deferred income taxes	99	131
Share-based compensation	105	99
Other, net	(65)	(41)
Net change in other operating items, net of effects from acquisitions and changes in AARP balances:
Accounts receivable	(990)	(463)
Other assets	(1,281)	(556)
Medical costs payable	387	673
Accounts payable and other liabilities	1,665	(237)
Other policy liabilities	(203)	0
Unearned revenues	232	(129)
Cash flows from operating activities	1,408	1,053
Investing activities
Purchases of investments	(2,914)	(2,824)
Sales of investments	2,235	1,282
Maturities of investments	825	1,195
Cash paid for acquisitions, net of cash assumed	(345)	(279)
Purchases of property, equipment and capitalized software	(353)	(323)
Other, net	(51)	45
Cash flows used for investing activities	(603)	(904)
Financing activities
Common stock repurchases	(911)	(543)
Cash dividends paid	(276)	(216)
Proceeds from common stock issuances	216	116
Repayments of long-term debt	(172)	(1,077)
Proceeds from commercial paper, net	9	130
Proceeds from issuance of long-term debt	0	2,235
Customer funds administered	818	962
Other, net	(257)	(104)
Cash flows (used for) from financing activities	(573)	1,503
Effect of exchange rate changes on cash and cash equivalents	6	(20)
Increase in cash and cash equivalents	238	1,632
Cash and cash equivalents, beginning of period	7,276	8,406
Cash and Cash Equivalents, end of period	$ 7,514	$ 10,038