Consolidated Statement of Redeemable Convertible Preferred Stock and Equity (USD $) In Thousands, except Share data, unless otherwise specified	Total	Common Stock	Additional Paid-in Capital	Foreign Currency Translation Adjustments	Derivative Instruments	Unrealized Gains (Losses) on Available-for-sale Securities	Accumulated Deficit	Noncontrolling Interest	Redeemable Convertible Preferred Stock
Balance, value at Dec. 31, 2008	$ 2,715,865	$ 2,885	$ 5,614,507	$ 26,821	$ (435,150)	$ 0	$ (2,493,198)	$ 0
Redeemable preferred stock balance, value at Dec. 31, 2008									314,726
Balance, (in shares) at Dec. 31, 2008		288,464,431
Redeemable preferred stock balance, (in shares) at Dec. 31, 2008									6,361,000
Stock-based compensation related activity, net of forfeitures, value	74,274	43	74,231
Stock-based compensation related activity, net of forfeitures, shares		4,381,128
Purchases and retirement of capital stock, value	(3,003)	(1)	(2,864)					(138)
Purchases and retirement of capital stock, shares		(115,875)
Foreign currency translation adjustments	41,399			41,626				(227)
Available-for-sale securities:
Unrealized gain (loss), net of tax	6,799					6,799
Derivative instruments:
Net change in fair value of cash flow hedging instruments, net of tax	80,789				80,789
Amounts reclassified into results of operations, net of tax	154,891				154,891
Dividends on preferred stock and amortization of issue costs, preferred stock									928
Dividends on preferred stock and amortization of issue costs, accumulated deficit	(20,806)						(20,806)
Net income (loss)	(114,123)						(114,332)	209
Redeemable preferred stock balance, value at Dec. 31, 2009									315,654
Balance, value at Dec. 31, 2009	2,936,085	2,927	5,685,874	68,447	(199,470)	6,799	(2,628,336)	(156)
Redeemable preferred stock balance, (in shares) at Dec. 31, 2009									6,361,000
Balance, (in shares) at Dec. 31, 2009		292,729,684
Stock-based compensation related activity, net of forfeitures, value	55,271	22	55,249
Stock-based compensation related activity, net of forfeitures, shares		2,230,458
Purchases and retirement of capital stock, value	(159,639)	(41)	(159,598)
Purchases and retirement of capital stock, shares		(4,133,858)
Foreign currency translation adjustments	27,908			27,812				96
Available-for-sale securities:
Unrealized gain (loss), net of tax	738					738
Derivative instruments:
Net change in fair value of cash flow hedging instruments, net of tax	(140,194)				(140,194)
Amounts reclassified into results of operations, net of tax	56,890				56,890
Dividends on preferred stock and amortization of issue costs, preferred stock									927
Dividends on preferred stock and amortization of issue costs, accumulated deficit	(20,806)						(20,806)
Net income (loss)	(311,259)						(310,940)	(319)
Redeemable preferred stock balance, value at Dec. 31, 2010	316,581								316,581
Balance, value at Dec. 31, 2010	2,444,994	2,908	5,581,525	96,259	(282,774)	7,537	(2,960,082)	(379)
Redeemable preferred stock balance, (in shares) at Dec. 31, 2010	6,361,000								6,361,000
Balance, (in shares) at Dec. 31, 2010	290,826,284	290,826,284
Stock-based compensation related activity, net of forfeitures, value	34,167	10	34,157
Stock-based compensation related activity, net of forfeitures, shares		1,000,891
Purchases and retirement of capital stock, value	(303,414)	(74)	(303,340)
Purchases and retirement of capital stock, shares		(7,377,803)
Purchases and retirement of preferred stock and losses on purchases of preferred stock, value	(2,538)						(2,538)		(12,464)
Purchases and retirement of preferred stock and losses on purchases of preferred stock, shares									(250,000)
Foreign currency translation adjustments	(848)			(1,215)				367
Available-for-sale securities:
Unrealized gain (loss), net of tax	(7,537)					(7,537)
Derivative instruments:
Net change in fair value of cash flow hedging instruments, net of tax	(973)				(973)
Amounts reclassified into results of operations, net of tax	71,707				71,707
Dividends on preferred stock and amortization of issue costs, preferred stock									915
Dividends on preferred stock and amortization of issue costs, accumulated deficit	(20,402)						(20,402)
Acquisition of noncontrolling interest	248						0	248
Net income (loss)	171,460						171,077	383
Redeemable preferred stock balance, value at Dec. 31, 2011	305,032								305,032
Balance, value at Dec. 31, 2011	$ 2,386,864	$ 2,844	$ 5,312,342	$ 95,044	$ (212,040)	$ 0	$ (2,811,945)	$ 619
Redeemable preferred stock balance, (in shares) at Dec. 31, 2011	6,111,000								6,111,000
Balance, (in shares) at Dec. 31, 2011	284,449,372	284,449,372