Annual report pursuant to Section 13 and 15(d)

Stock-based Compensation Plans and Awards - Schedule of shares available for grant and activity (Details)

v3.6.0.2
Stock-based Compensation Plans and Awards - Schedule of shares available for grant and activity (Details) - shares
 12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Dec. 31, 2014
Shares Available for Grant      
Beginning balance (in shares) 15,042,664    
Additional shares authorized (in shares) 8,998,816    
ESPP shares issued (in shares) (1,254,910)    
Options forfeited (in shares) 1,592,289    
Share adjustment (in shares) 614,967    
Ending balance (in shares) 10,409,095 15,042,664  
Restricted stock units      
Shares Available for Grant      
Units granted (in shares) (15,522,398)    
Forfeited (in shares) 2,587,203    
Performance stock units      
Shares Available for Grant      
Units granted (in shares) (1,835,250) 0 0
Forfeited (in shares) 0    
MSUs      
Shares Available for Grant      
Units granted (in shares) 0 (776,000)  
Forfeited (in shares) 185,714    
Equity Awards      
Shares Available for Grant      
Beginning balance (in shares) 11,723,327    
Additional shares authorized (in shares) 8,998,816    
ESPP shares issued (in shares) 0    
Options forfeited (in shares) 1,592,289    
Share adjustment (in shares) 614,967    
Ending balance (in shares) 8,344,668 11,723,327  
Equity Awards | Restricted stock units      
Shares Available for Grant      
Units granted (in shares) (15,522,398)    
Forfeited (in shares) 2,587,203    
Equity Awards | Performance stock units      
Shares Available for Grant      
Units granted (in shares) (1,835,250)    
Equity Awards | MSUs      
Shares Available for Grant      
Forfeited (in shares) 185,714    
ESPP      
Shares Available for Grant      
Beginning balance (in shares) 3,319,337    
Additional shares authorized (in shares) 0    
ESPP shares issued (in shares) (1,254,910)    
Options forfeited (in shares) 0    
Share adjustment (in shares) 0    
Ending balance (in shares) 2,064,427 3,319,337  
ESPP | Restricted stock units      
Shares Available for Grant      
Units granted (in shares) 0    
Forfeited (in shares) 0    
ESPP | Performance stock units      
Shares Available for Grant      
Units granted (in shares) 0    
ESPP | MSUs      
Shares Available for Grant      
Forfeited (in shares) 0