Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015
Cash flows from operating activities:
Net income	$ 3,770	$ 3,276
Depreciation and amortization	1,043	1,043
Share-based compensation expense	139	160
Deferred income taxes	245	(126)
Other items, net	42	5
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(119)	(199)
Inventories	(156)	196
Other assets	(330)	85
Accounts payable	(100)	(198)
Accrued income taxes	(328)	369
Other liabilities	386	155
Net cash provided by operating activities	4,592	4,766
Cash flows from investing activities:
Purchases of property, plant and equipment	(344)	(251)
Purchases of intangible assets	(99)	(50)
Proceeds from the sale of property, plant and equipment	14	226
Purchases of marketable securities	(14,969)	(13,530)
Proceeds from sales of marketable securities	9,063	8,021
Proceeds from maturities of marketable securities	1,339	2,500
Other	(51)	(227)
Net cash used in investing activities	(5,047)	(3,311)
Cash flows from financing activities:
Net proceeds from issuance of debt	2,908	3,464
Repayment of debt	(1,000)	(2,150)
Repurchases of common stock	(1,218)	(940)
Dividends paid	(1,504)	(1,201)
Settlement of contingent consideration obligation	0	(225)
Withholding taxes arising from shares withheld for share-based payments	(262)	(390)
Other	17	51
Net cash used in financing activities	(1,059)	(1,391)
(Decrease) increase in cash and cash equivalents	(1,514)	64
Cash and cash equivalents at beginning of period	4,144	3,731
Cash and cash equivalents at end of period	$ 2,630	$ 3,795