Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Cash flows from operating activities
Net income	$ 656	$ 487
Adjustments to Net income:
Depreciation	203	213
Amortization of acquisition-related intangibles	80	81
Amortization of capitalized software	13	16
Stock-based compensation	78	78
Gains on sales of assets	(1)	(37)
Deferred income taxes	1	0
Increase (decrease) from changes in:
Accounts receivable	(154)	(149)
Inventories	(60)	17
Prepaid expenses and other current assets	54	(29)
Accounts payable and accrued expenses	(108)	(117)
Accrued compensation	(294)	(189)
Income taxes payable	147	80
Changes in funded status of retirement plans	19	22
Other	(25)	(11)
Cash flows from operating activities	609	462
Cash flows from investing activities
Capital expenditures	(123)	(77)
Proceeds from asset sales	1	37
Purchases of short-term investments	(335)	(1,051)
Proceeds from short-term investments	615	785
Other	0	1
Cash flows from investing activities	158	(305)
Cash flows from financing activities
Proceeds from issuance of long-term debt	0	498
Dividends paid	(356)	(325)
Stock repurchases	(670)	(720)
Proceeds from common stock transactions	246	283
Excess tax benefit from share-based payments	56	49
Other	0	(4)
Cash flows from financing activities	(724)	(219)
Net change in Cash and cash equivalents	43	(62)
Cash and cash equivalents at beginning of period	1,199	1,627
Cash and cash equivalents at end of period	$ 1,242	$ 1,565