Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Cash flows from operating activities:
Net income	$ 3,683	$ 4,627	$ 4,605
Depreciation and amortization	1,060	1,017	1,049
Stock-based compensation expense	341	353	284
Deferred income taxes	(399)	(167)	47
Property, plant and equipment impairments	6	118	21
Dividend received from equity investee	0	0	110
Other items, net	63	140	111
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(557)	(210)	(36)
Inventories	(383)	153	(134)
Other assets	(133)	36	(3)
Accounts payable	(95)	142	71
Accrued income taxes	(20)	(656)	(142)
Legal reserve	780	0	0
Other liabilities	773	234	353
Net cash provided by operating activities	5,119	5,787	6,336
Cash flows from investing activities:
Purchases of property, plant and equipment	(567)	(580)	(530)
Cash paid for acquisitions, net of cash acquired	(701)	0	0
Purchases of marketable securities	(21,183)	(14,602)	(12,418)
Proceeds from sales of marketable securities	20,871	10,485	8,252
Proceeds from maturities of marketable securities	749	642	1,443
Other	45	(97)	51
Net cash used in investing activities	(786)	(4,152)	(3,202)
Cash flows from financing activities:
Repurchases of common stock	(8,315)	(3,786)	(3,208)
Repayment of debt	(2,500)	0	(1,000)
Repayments of commercial paper	(762)	0	0
Dividends paid	(500)	0	0
Net proceeds from issuance of debt	10,387	2,471	1,980
Net proceeds from issuance of commercial paper	762	0	0
Other	254	83	204
Net cash used in financing activities	(674)	(1,232)	(2,024)
Increase in cash and cash equivalents	3,659	403	1,110
Cash and cash equivalents at beginning of period	3,287	2,884	1,774
Cash and cash equivalents at end of period	$ 6,946	$ 3,287	$ 2,884