Quarterly report pursuant to Section 13 or 15(d)

Stockholders' Equity - Additional Information (Details)

v3.2.0.727
Stockholders' Equity - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jun. 30, 2015
Jun. 30, 2014
Jun. 30, 2015
Jun. 30, 2014
Dec. 31, 2014
Class Of Stock [Line Items]          
Common stock, par value (in dollars per share) $ 0.001   $ 0.001   $ 0.001
Common stock, shares authorized (in shares) 9,000,000,000   9,000,000,000   9,000,000,000
Common stock, shares issued (in shares) 5,379,798,000   5,379,798,000   5,653,529,000
Common stock, shares outstanding (in shares) 5,370,298,000   5,370,298,000   5,646,119,000
Common stock reserved for issuance 261,694,000   261,694,000    
Number of shares repurchased 1,547,431,000   1,547,431,000    
Aggregate cost for shares repurchased $ 5,379,148,000   $ 5,379,148,000    
Remaining amount authorized under the stock repurchase program $ 620,852,000   $ 620,852,000    
Preferred stock, par value (in dollars per share) $ 0.001   $ 0.001   $ 0.001
Undesignated preferred stock, shares authorized 50,000,000   50,000,000   50,000,000
Preferred stock liquidation preference per share $ 0.001   $ 0.001   $ 0.001
Preferred stock, shares issued 0   0   0
Preferred stock, shares outstanding 0   0   0
Warrants outstanding 0   0   16,667,000
Number of warrants exercised (in shares) 16,667,000        
Exercise price of outstanding warrants         $ 2.50
Warrant expenses $ 0 $ 0 $ 0 $ 0  
Common Stock [Member]          
Class Of Stock [Line Items]          
Issuance of common stock upon exercise of warrants (in shares) 6,010,000        
Common Stock [Member] | December 2012 Share Repurchase Program [Member]          
Class Of Stock [Line Items]          
Stock repurchase program, authorized amount $ 6,000,000,000   $ 6,000,000,000