Consolidated statements of cash flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2012	Mar. 31, 2011
Cash flows from operating activities:
Net income	$ 265	$ 666
Adjustments to net income:
Depreciation	243	224
Stock-based compensation	69	57
Amortization of acquisition-related intangibles	86	7
Deferred income taxes	(4)	31
Increase (decrease) from changes in:
Accounts receivable	63	(44)
Inventories	(91)	(158)
Prepaid expenses and other current assets	5	(9)
Accounts payable and accrued expenses	(37)	(83)
Accrued compensation	(211)	(281)
Income taxes payable	67	137
Other	(6)	(31)
Cash flows from operating activities	449	516
Cash flows from investing activities:
Additions to property, plant and equipment	(103)	(194)
Purchases of short-term investments	(242)	(872)
Proceeds from short-term investments	613	1,111
Purchases of long-term investments	(1)	(1)
Proceeds from long-term investments	3	19
Cash flows from investing activities	270	63
Cash flows from financing activities:
Repayment of commercial paper borrowings	(300)	0
Dividends paid	(195)	(153)
Proceeds from common stock transactions	259	350
Excess tax benefit from share-based payments	18	19
Stock repurchases	(300)	(771)
Cash flows from financing activities	(518)	(555)
Net change in cash and cash equivalents	201	24
Cash and cash equivalents, beginning of period	992	1,319
Cash and cash equivalents, end of period	$ 1,193	$ 1,343