Condensed Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014
Cash flows from operating activities:
Net income	$ 3,276	$ 2,620
Depreciation and amortization	1,043	1,024
Stock-based compensation expense	160	199
Deferred income taxes	(126)	108
Other items, net	(228)	(107)
Changes in operating assets and liabilities, net of acquisitions:
Trade receivables, net	(199)	0
Inventories	196	40
Other assets	85	(11)
Accounts payable	(269)	125
Accrued income taxes	369	(131)
Other liabilities	(164)	(498)
Net cash provided by operating activities	4,143	3,369
Cash flows from investing activities:
Purchases of property, plant and equipment	(251)	(345)
Proceeds from sale of property, plant and equipment	226	0
Cash paid for acquisitions, net of cash acquired	0	(115)
Purchases of marketable securities	(13,530)	(15,593)
Proceeds from sales of marketable securities	8,021	9,137
Proceeds from maturities of marketable securities	2,500	3,295
Change in restricted investments	0	533
Other	(277)	(135)
Net cash used in investing activities	(3,311)	(3,223)
Cash flows from financing activities:
Net proceeds from issuance of debt	3,464	4,476
Repayment of debt	(2,150)	(3,355)
Repurchases of common stock	(940)	0
Dividends paid	(1,201)	(923)
Net proceeds from issuance of common stock in connection with the Company’s equity award programs	52	99
Settlement of contingent consideration obligation	(225)	0
Other	232	104
Net cash (used in) provided by financing activities	(768)	401
Increase in cash and cash equivalents	64	547
Cash and cash equivalents at beginning of period	3,731	3,805
Cash and cash equivalents at end of period	$ 3,795	$ 4,352