Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities
Net income	$ 3,338	$ 2,548
Adjustments to Net income:
Depreciation	406	466
Amortization of acquisition-related intangibles	239	239
Amortization of capitalized software	35	23
Stock compensation	197	204
Deferred income taxes	(47)	(160)
Increase (decrease) from changes in:
Accounts receivable	(306)	(274)
Inventories	(118)	(117)
Prepaid expenses and other current assets	43	130
Accounts payable and accrued expenses	(19)	13
Accrued compensation	(85)	(26)
Income taxes payable	(226)	153
Changes in funded status of retirement plans	36	56
Other	(59)	(28)
Cash flows from operating activities	3,434	3,227
Cash flows from investing activities
Capital expenditures	(464)	(421)
Proceeds from asset sales	40	0
Purchases of short-term investments	(3,105)	(2,171)
Proceeds from short-term investments	3,305	2,625
Other	(5)	2
Cash flows from investing activities	(229)	35
Cash flows from financing activities
Proceeds from issuance of long-term debt	605	499
Repayment of debt	(625)	(1,000)
Dividends paid	(1,493)	(1,147)
Stock repurchases	(1,850)	(1,657)
Proceeds from common stock transactions	321	415
Other	(21)	(3)
Cash flows from financing activities	(3,063)	(2,893)
Net change in Cash and cash equivalents	142	369
Cash and cash equivalents at beginning of period	1,154	1,000
Cash and cash equivalents at end of period	$ 1,296	$ 1,369