Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Cash flows from operating activities
Net income	$ 997	$ 711
Adjustments to Net income:
Depreciation	139	161
Amortization of acquisition-related intangibles	80	80
Amortization of capitalized software	11	8
Stock compensation	68	72
Deferred income taxes	9	24
Increase (decrease) from changes in:
Accounts receivable	(68)	(100)
Inventories	(53)	(114)
Prepaid expenses and other current assets	(71)	43
Accounts payable and accrued expenses	(78)	(41)
Accrued compensation	(356)	(322)
Income taxes payable	149	131
Changes in funded status of retirement plans	(14)	18
Other	(18)	(18)
Cash flows from operating activities	795	653
Cash flows from investing activities
Capital expenditures	(127)	(124)
Proceeds from asset sales	40	0
Purchases of short-term investments	(757)	(200)
Proceeds from short-term investments	1,120	900
Other	(9)	(3)
Cash flows from investing activities	267	573
Cash flows from financing activities
Repayment of debt	(250)	0
Dividends paid	(500)	(383)
Stock repurchases	(550)	(630)
Proceeds from common stock transactions	161	68
Other	(4)	0
Cash flows from financing activities	(1,143)	(945)
Net change in Cash and cash equivalents	(81)	281
Cash and cash equivalents at beginning of period	1,154	1,000
Cash and cash equivalents at end of period	$ 1,073	$ 1,281