Stockholders' Equity - Stock Option and RSU Award Activity (Details) (USD $) In Millions, except Share data, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Shares Available for Grant(1)
Balance as of December 31, 2011	52,318,000	[1]
RSUs settled	0	[1]
Stock options forfeited/cancelled	213,000	[1]
RSUs granted	(41,252,000)	[1]
Shares withheld related to net share settlement of RSUs	122,757,000	[1]
RSUs forfeited and cancelled	12,955,000	[1]
2012 Equity Incentive Plan shares authorized	25,000,000	[1]
Balance as of December 31, 2012	171,991,000	[1]	52,318,000	[1]
Number of Shares
Balance as of December 31, 2011	258,539,000
RSUs settled	(135,505,000)
Stock options forfeited/cancelled	(213,000)
Balance as of December 31, 2012	122,821,000		258,539,000
Stock options vested and expected to vest as of December 31, 2012	122,791,000
Stock options exercisable as of December 31, 2012	113,688,000
Weighted Average Exercise Price
Balance as of December 31, 2011	$ 0.47
RSUs settled	$ 0.12
Stock options forfeited/cancelled	$ 1.41
Balance as of December 31, 2012	$ 0.85		$ 0.47
Stock options vested and expected to vest as of December 31, 2012	$ 0.85
Stock options exercisable as of December 31, 2012	$ 0.34
Weighted- Average Remaining Contractual Term
Weighted- Average Remaining Contractual Term	3 years 9 months 15 days		4 years 4 months 17 days
Stock options vested and expected to vest as of December 31, 2012	3 years 9 months 15 days
Stock options exercisable as of December 31, 2012	3 years 6 months 11 days
Aggregate Intrinsic Value(2)
Balance as of December 31, 2011	$ 7,360	[2]
Balance as of December 31, 2012	3,166	[2]	7,360	[2]
Stock options vested and expected to vest as of December 31, 2012	3,166	[2]
Stock options exercisable as of December 31, 2012	2,989	[2]
Outstanding RSUs(3)
Balance as of December 31, 2011	378,772,000	[3]
RSUs granted	41,252,000	[3]
RSUs settled	(278,846,000)	[3]
RSUs forfeited and cancelled	(12,955,000)	[3]
Balance as of December 31, 2012	128,223,000	[3]	378,772,000	[3]
Weighted Average Grant Date Fair Value
Balance as of December 31, 2011	$ 6.83
RSUs granted	$ 32.60
RSUs settled	$ 3.02
RSUs forfeited and cancelled	$ 20.00
Balance as of December 31, 2012	$ 22.08		$ 6.83
RSUs vested	69,196,000
RSUs grant date fair value	$ 9.14
Unvested RSUs	113,044,000		153,943,000
Issuance of common stock settlement of restricted stock units (RSUs)	279,000,000
RSUs net settled	273,000,000
Shares held for tax witholdings	123,000,000
Value of shares remitted for tax withholdings	$ (2,862)
Restricted Stock Award
Shares Available for Grant(1)
Balance as of December 31, 2012	195,000	[1]
Employee Stock Options and Restricted Stock Units (RSUs)
Shares Available for Grant(1)
Balance as of December 31, 2012	171,796,000	[1]

[1] After excluding 195 thousand restricted stock awards included in the table above, 171,796 thousand shares are available for grant under the Stock Plans as of December 31, 2012.

[2] The aggregate intrinsic value is calculated as the difference between the exercise price of the underlying stock option awards and the assessed fair value of our common stock as of December 31, 2011 and the closing market price of our common stock as of December 31, 2012.

[3] During the year ended December 31, 2012 69,196 thousand RSUs were vested and the total grant date fair value of these RSUs vested is $9.14. As of December 31, 2012 and 2011, we have 113,044 thousand and 153,943 thousand of unvested RSUs.