Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015
Cash flows from operating activities:
Net income	$ 5,787	$ 5,139
Depreciation and amortization	1,546	1,566
Share-based compensation expense	222	242
Deferred income taxes	80	(251)
Other items, net	93	26
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(192)	(302)
Inventories	(125)	284
Other assets	(335)	192
Accounts payable	(147)	(74)
Accrued income taxes	(140)	478
Other liabilities	465	358
Net cash provided by operating activities	7,254	7,658
Cash flows from investing activities:
Purchases of property, plant and equipment	(511)	(389)
Proceeds from the sale of property, plant and equipment	15	271
Purchases of marketable securities	(22,682)	(19,792)
Proceeds from sales of marketable securities	14,072	11,784
Proceeds from maturities of marketable securities	1,932	3,179
Other	(262)	(367)
Net cash used in investing activities	(7,436)	(5,314)
Cash flows from financing activities:
Net proceeds from issuance of debt	6,713	3,464
Repayment of debt	(2,725)	(2,275)
Repurchases of common stock	(1,982)	(1,684)
Dividends paid	(2,251)	(1,800)
Settlement of contingent consideration obligation	0	(225)
Withholding taxes arising from shares withheld for share-based payments	(254)	(394)
Other	22	65
Net cash used in financing activities	(477)	(2,849)
Decrease in cash and cash equivalents	(659)	(505)
Cash and cash equivalents at beginning of period	4,144	3,731
Cash and cash equivalents at end of period	$ 3,485	$ 3,226