Consolidated statements of cash flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012
Cash flows from operating activities:
Net income	$ 1,022	$ 711
Adjustments to net income:
Depreciation	449	484
Amortization of acquisition-related intangibles	170	171
Stock-based compensation	150	133
Gains on sales of assets	(3)	0
Deferred income taxes	(39)	17
Increase (decrease) from changes in:
Accounts receivable	(272)	(88)
Inventories	37	(123)
Prepaid expenses and other current assets	(283)	55
Accounts payable and accrued expenses	(280)	(114)
Accrued compensation	(59)	(136)
Income taxes payable	144	(36)
Changes in funded status of retirement plans	52	53
Other	(53)	(3)
Cash flows from operating activities	1,035	1,124
Cash flows from investing activities:
Capital expenditures	(182)	(249)
Proceeds from asset sales	18	0
Purchases of short-term investments	(2,402)	(657)
Proceeds from short-term investments	2,883	1,466
Purchases of long-term investments	(1)	(1)
Proceeds from long-term investments	15	32
Cash flows from investing activities	331	591
Cash flows from financing activities:
Proceeds from issuance of long-term debt	986	0
Repayment of debt and commercial paper borrowings	(1,500)	(875)
Dividends paid	(541)	(390)
Stock repurchases	(1,400)	(600)
Proceeds from common stock transactions	797	327
Excess tax benefit from share-based payments	63	23
Other	(7)	0
Cash flows from financing activities	(1,602)	(1,515)
Net change in cash and cash equivalents	(236)	200
Cash and cash equivalents, beginning of period	1,416	992
Cash and cash equivalents, end of period	$ 1,180	$ 1,192