CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
Operating activities
Net income	$ 10,737	$ 9,737	$ 8,505
Adjustments:
Depreciation and amortization of property and equipment	1,988	1,396	1,067
Amortization of intangible and other assets	974	455	329
Stock-based compensation expense	2,692	1,974	1,376
Excess tax benefits from stock-based award activities	(188)	(86)	(94)
Deferred income taxes	(266)	343	9
Impairment of equity investments	0	110	0
Gain on divestiture of business	(188)	0	0
Other	(28)	6	(12)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(787)	(1,156)	(1,129)
Income taxes, net	1,492	731	102
Inventories	301	(30)	0
Prepaid revenue share, expenses and other assets	(833)	(232)	(414)
Accounts payable	(499)	101	272
Accrued expenses and other liabilities	762	795	745
Accrued revenue share	299	259	214
Deferred revenue	163	162	111
Net cash provided by operating activities	16,619	14,565	11,081
Investing activities
Purchases of property and equipment	(3,273)	(3,438)	(4,018)
Purchases of marketable securities	(33,410)	(61,672)	(43,985)
Maturities and sales of marketable securities	35,180	48,746	37,099
Investments in non-marketable equity securities	(696)	(428)	(320)
Cash collateral related to securities lending	(334)	(354)	2,361
Investments in reverse repurchase agreements	45	5	(750)
Acquisitions, net of cash acquired and proceeds received from divestiture, and purchases of intangible and other assets	(10,568)	(1,900)	(1,067)
Net cash used in investing activities	(13,056)	(19,041)	(10,680)
Financing activities
Net proceeds (payments) from stock-based award activities	(287)	(5)	294
Excess tax benefits from stock-based award activities	188	86	94
Repurchase of common stock in connection with acquisitions	0	0	(801)
Proceeds from issuance of debt, net of costs	16,109	10,905	5,246
Repayment of debt	(14,781)	(10,179)	(1,783)
Net cash provided by financing activities	1,229	807	3,050
Effect of exchange rate changes on cash and cash equivalents	3	22	(19)
Net increase (decrease) in cash and cash equivalents	4,795	(3,647)	3,432
Cash and cash equivalents at beginning of year	9,983	13,630	10,198
Cash and cash equivalents at end of year	14,778	9,983	13,630
Supplemental disclosures of cash flow information
Cash paid for interest	74	40	0
Cash paid for taxes	2,034	1,471	2,175
Non-cash financing activity:
Fair value of stock-based awards assumed in connection with acquisitions	$ 41	$ 0	$ 750