Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2016	Mar. 31, 2015
Cash flows from operating activities
Net income	$ 668	$ 656
Adjustments to Net income:
Depreciation	161	203
Amortization of acquisition-related intangibles	80	80
Amortization of capitalized software	8	13
Stock-based compensation	72	78
Gains on sales of assets	0	(1)
Deferred income taxes	24	1
Increase (decrease) from changes in:
Accounts receivable	(100)	(154)
Inventories	(114)	(60)
Prepaid expenses and other current assets	43	54
Accounts payable and accrued expenses	(104)	(108)
Accrued compensation	(322)	(294)
Income taxes payable	131	147
Changes in funded status of retirement plans	18	19
Other	(18)	(25)
Cash flows from operating activities	547	609
Cash flows from investing activities
Capital expenditures	(124)	(123)
Proceeds from asset sales	0	1
Purchases of short-term investments	(200)	(335)
Proceeds from short-term investments	900	615
Other	(3)	0
Cash flows from investing activities	573	158
Cash flows from financing activities
Dividends paid	(383)	(356)
Stock repurchases	(630)	(670)
Proceeds from common stock transactions	131	246
Excess tax benefit from share-based payments	43	56
Cash flows from financing activities	(839)	(724)
Net change in Cash and cash equivalents	281	43
Cash and cash equivalents at beginning of period	1,000	1,199
Cash and cash equivalents at end of period	$ 1,281	$ 1,242