Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities:
Net income	$ 5,139	$ 3,864
Depreciation and amortization	1,566	1,567
Stock-based compensation expense	242	302
Deferred income taxes	(251)	296
Other items, net	(221)	(260)
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(302)	345
Inventories	284	99
Other assets	192	(120)
Accounts payable	(127)	104
Accrued income taxes	478	(324)
Other liabilities	17	237
Net cash provided by operating activities	7,017	6,110
Cash flows from investing activities:
Purchases of property, plant and equipment	(389)	(515)
Proceeds from sale of property, plant and equipment	271	0
Cash paid for acquisitions, net of cash acquired	0	(115)
Purchase of intangible assets	(55)	(150)
Purchases of marketable securities	(19,792)	(20,831)
Proceeds from sales of marketable securities	11,784	11,060
Proceeds from maturities of marketable securities	3,179	3,962
Change in restricted investments	0	533
Other	(312)	(70)
Net cash used in investing activities	(5,314)	(6,126)
Cash flows from financing activities:
Net proceeds from issuance of debt	3,464	4,476
Repayment of debt	(2,275)	(3,480)
Repurchases of common stock	(1,684)	0
Dividends paid	(1,800)	(1,387)
Net proceeds from issuance of common stock in connection with the Company’s equity award programs	65	153
Settlement of contingent consideration obligation	(225)	0
Other	247	126
Net cash used in financing activities	(2,208)	(112)
Decrease in cash and cash equivalents	(505)	(128)
Cash and cash equivalents at beginning of period	3,731	3,805
Cash and cash equivalents at end of period	$ 3,226	$ 3,677