Consolidated Statements of Cash Flows - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014
Cash flows from operating activities
Net income	$ 2,150	$ 1,996
Adjustments to Net income:
Depreciation	594	639
Amortization of acquisition-related intangibles	240	241
Amortization of capitalized software	38	45
Stock-based compensation	228	217
Gains on sales of assets	(3)	(44)
Deferred income taxes	(106)	(84)
Increase (decrease) from changes in:
Accounts receivable	(241)	(272)
Inventories	13	(20)
Prepaid expenses and other current assets	89	81
Accounts payable and accrued expenses	(190)	(224)
Accrued compensation	(37)	51
Income taxes payable	21	(90)
Changes in funded status of retirement plans	65	73
Other	(23)	11
Cash flows from operating activities	2,838	2,620
Cash flows from investing activities
Capital expenditures	(387)	(260)
Proceeds from asset sales	10	46
Purchases of short-term investments	(1,713)	(2,170)
Proceeds from short-term investments	2,455	2,491
Other	8	7
Cash flows from investing activities	373	114
Cash flows from financing activities
Proceeds from issuance of long-term debt	498	498
Repayment of debt	(1,000)	(1,000)
Dividends paid	(1,058)	(967)
Stock repurchases	(2,114)	(2,133)
Proceeds from common stock transactions	332	476
Excess tax benefit from share-based payments	68	75
Other	(3)	(4)
Cash flows from financing activities	(3,277)	(3,055)
Net change in Cash and cash equivalents	(66)	(321)
Cash and cash equivalents at beginning of period	1,199	1,627
Cash and cash equivalents at end of period	$ 1,133	$ 1,306