Consolidated Statements of Cash Flows (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013
Cash flows from operating activities:
Net income	$ 1,170	$ 1,022
Adjustments to Net income:
Depreciation	426	449
Amortization of acquisition-related intangibles	161	170
Amortization of capitalized software	30	47
Stock-based compensation	155	150
Gains on sales of assets	(39)	(3)
Deferred income taxes	(57)	(14)
Increase (decrease) from changes in:
Accounts receivable	(314)	(272)
Inventories	(13)	37
Prepaid expenses and other current assets	(15)	(308)
Accounts payable and accrued expenses	(176)	(280)
Accrued compensation	(76)	(59)
Income taxes payable	(48)	144
Changes in funded status of retirement plans	41	52
Other	(8)	(100)
Cash flows from operating activities	1,237	1,035
Cash flows from investing activities:
Capital expenditures	(157)	(182)
Proceeds from asset sales	40	18
Purchases of short-term investments	(1,466)	(2,402)
Proceeds from short-term investments	2,079	2,883
Other	1	14
Cash flows from investing activities	497	331
Cash flows from financing activities:
Proceeds from issuance of long-term debt	498	986
Repayment of debt	(1,000)	(1,500)
Dividends paid	(648)	(541)
Stock repurchases	(1,463)	(1,400)
Proceeds from common stock transactions	408	797
Excess tax benefit from share-based payments	64	63
Other	(4)	(7)
Cash flows from financing activities	(2,145)	(1,602)
Net change in Cash and cash equivalents	(411)	(236)
Cash and cash equivalents at beginning of period	1,627	1,416
Cash and cash equivalents at end of period	$ 1,216	$ 1,180