Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 1,184	$ 1,125
Depreciation and amortization	259	273
Stock-based compensation expense	75	77
Other items, net	67	14
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(92)	(181)
Inventories	(16)	(78)
Other assets	(133)	(62)
Accounts payable	226	104
Accrued income taxes	(60)	8
Other liabilities	(538)	(250)
Net cash provided by operating activities	972	1,030
Cash flows from investing activities:
Purchases of property, plant and equipment	(144)	(100)
Cash paid for acquisitions, net of cash acquired	(969)	(403)
Purchases of marketable securities	(6,133)	(7,203)
Proceeds from sales of marketable securities	4,740	6,933
Proceeds from maturities of marketable securities	160	224
Other	0	(6)
Net cash used in investing activities	(2,346)	(555)
Cash flows from financing activities:
Repurchases of common stock	(1,375)	(14)
Repayment of debt	(84)	(2,500)
Dividends paid	(285)	0
Net proceeds from issuance of common stock in connection with the company's equity award programs	374	16
Other	5	2
Net cash used in financing activities	(1,365)	(2,496)
Decrease in cash and cash equivalents	(2,739)	(2,021)
Cash and cash equivalents at beginning of period	6,946	3,287
Cash and cash equivalents at end of period	$ 4,207	$ 1,266