Condensed Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Operating activities
Net earnings	$ 4,282	$ 3,884
Noncash items:
Depreciation and amortization	939	834
Deferred income taxes	181	(88)
Share-based compensation	329	316
Other, net	(154)	(80)
Net change in other operating items, net of effects from acquisitions and changes in AARP balances:
Accounts receivable	93	(215)
Other assets	(101)	(235)
Medical costs payable	141	74
Accounts payable and other liabilities	252	254
Other policy liabilities	(316)	542
Unearned revenues	(173)	2,097
Cash flows from operating activities	5,473	7,383
Investing activities
Purchases of investments	(7,432)	(6,984)
Sales of investments	2,566	2,986
Maturities of investments	3,742	2,974
Cash paid for acquisitions, net of cash assumed	(2,550)	(1,478)
Proceeds from Divestiture of Businesses, Net of Cash Divested	0	385
Purchases of property, equipment and capitalized software	(786)	(806)
Cash flows used for investing activities	(4,460)	(2,923)
Financing activities
Common stock repurchases	(2,594)	(2,094)
Proceeds from common stock issuances	508	311
Dividends paid	(603)	(481)
Proceeds from commercial paper, net	540	820
Proceeds from issuance of long-term debt	1,480	747
Repayments of long-term debt	(631)	(955)
Interest rate swap termination	0	132
Customer funds administered	309	1,656
Checks outstanding in excess of bank deposits	(287)	(94)
Other, net	(248)	54
Cash flows (from) used for financing activities	(1,526)	96
(Decrease) increase in cash and cash equivalents	(513)	4,556
Cash and cash equivalents, beginning of period	9,429	9,123
Cash and cash equivalents, end of period	$ 8,916	$ 13,679