Condensed Consolidated Statements of Cash Flows (Unaudited) (USD $) In Thousands	9 Months Ended
	Sep. 30, 2011	Sep. 30, 2010
Cash flows from operating activities:
Consolidated net income	$ 328,849	$ 429,290
Adjustments to reconcile consolidated net income to net cash from operating activities:
Depreciation and amortization	125,986	112,366
Non-cash portion of share-based compensation	165,236	129,555
Deferred income taxes	(6,014)	26,425
Loss (gain) on equity investments	982	(3,232)
Excess tax benefits from share-based compensation	(44,524)	(32,932)
Amortization of debt issuance costs	509	0
Changes in operating assets and liabilities, net of effects from acquisitions:
Accounts receivable, net	152,019	(15,093)
Prepaid expenses and other assets	14,103	(67,813)
Accounts payable	(25,962)	8,464
Accrued compensation	(62,625)	8,390
Accrued litigation settlements	0	(169,330)
Income tax payable	70,241	(16,900)
Other accrued liabilities	23,309	836
Deferred revenue	1,012	31,274
Net cash provided by operating activities	743,121	441,300
Cash flows from investing activities:
Purchases of property and equipment	(187,886)	(137,481)
Purchases of trading investments	(4,575)	(2,338)
Purchases of available-for-sale investments	(1,893,474)	(1,361,510)
Proceeds from sales of available-for-sale investments	1,050,936	440,788
Proceeds from maturities of available-for-sale investments	446,150	744,464
Payment for business acquisition, net of cash and cash equivalents acquired	(31,101)	(133,333)
Changes in restricted cash	(1,144)	(12,432)
Purchases of privately-held and other equity investments, net	(32,402)	(5,288)
Net cash used in investing activities	(653,496)	(467,130)
Cash flows from financing activities:
Proceeds from issuance of common stock	341,063	257,693
Purchases and retirement of common stock	(548,590)	(388,698)
Issuance of long-term debt, net	991,556	0
Change in customer financing arrangements	(7,616)	(16,906)
Excess tax benefit from share-based compensation	44,524	32,932
Return of capital to noncontrolling interest	0	(3,000)
Net cash provided by (used in) financing activities	820,937	(117,979)
Net increase (decrease) in cash and cash equivalents	910,562	(143,809)
Cash and cash equivalents at beginning of period	1,811,887	1,604,723
Cash and cash equivalents at end of period	$ 2,722,449	$ 1,460,914