CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Operating activities
Net income	$ 9,737	$ 8,505	$ 6,520
Adjustments:
Depreciation and amortization of property and equipment	1,396	1,067	1,240
Amortization of intangible and other assets	455	329	284
Stock-based compensation expense	1,974	1,376	1,164
Excess tax benefits from stock-based award activities	(86)	(94)	(90)
Deferred income taxes	343	9	(268)
Impairment of equity investments	110	0	0
Other	6	(12)	(20)
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(1,156)	(1,129)	(504)
Income taxes, net	731	102	217
Prepaid revenue share, expenses and other assets	(262)	(414)	262
Accounts payable	101	272	34
Accrued expenses and other liabilities	795	745	243
Accrued revenue share	259	214	158
Deferred revenue	162	111	76
Net cash provided by operating activities	14,565	11,081	9,316
Investing activities
Purchases of property and equipment	(3,438)	(4,018)	(810)
Purchases of marketable securities	(61,672)	(43,985)	(29,139)
Maturities and sales of marketable securities	48,746	37,099	22,103
Investments in non-marketable equity securities	(428)	(320)	(65)
Cash collateral received (returned) from securities lending	(354)	2,361	0
Investments in reverse repurchase agreements	5	(750)	0
Acquisitions, net of cash acquired, and purchases of intangible and other assets	(1,900)	(1,067)	(108)
Net cash used in investing activities	(19,041)	(10,680)	(8,019)
Financing activities
Net proceeds (payments) from stock-based award activities	(5)	294	143
Excess tax benefits from stock-based award activities	86	94	90
Repurchase of common stock in connection with acquisitions	0	(801)	0
Proceeds from issuance of debt, net of costs	10,905	5,246	0
Repayment of debt	(10,179)	(1,783)	0
Net cash provided by financing activities	807	3,050	233
Effect of exchange rate changes on cash and cash equivalents	22	(19)	11
Net increase (decrease) in cash and cash equivalents	(3,647)	3,432	1,541
Cash and cash equivalents at beginning of year	13,630	10,198	8,657
Cash and cash equivalents at end of year	9,983	13,630	10,198
Supplemental disclosures of cash flow information
Cash paid for interest	40	0	0
Cash paid for taxes	1,471	2,175	1,896
Non-cash financing activity:
Fair value of common stock issued and vested options assumed in connection with acquisitions	$ 0	$ 750	$ 0