XML 113 R88.htm IDEA: XBRL DOCUMENT v3.19.3.a.u2
Stock-based Compensation (Details 2) - $ / shares
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares of common stock reserved for future issuance under all of the stock incentive plans 5,916,000,000    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested [Roll Forward]      
Outstanding at beginning of period 1,751,000    
Granted 1,028,000    
Vested (772,000)    
Forfeited (131,000)    
Outstanding at end of period 1,876,000 1,751,000  
Weighted Average Grant-Date Fair Value      
Outstanding at beginning of period $ 40.77    
Granted 50.32    
Vested 37.24    
Forfeited 45.92    
Outstanding at end of period $ 47.08 $ 40.77  
Employee Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares of common stock reserved for future issuance under all of the stock incentive plans 1,404,000    
Weighted Average Grant-Date Fair Value      
Granted $ 11.72 $ 10.01 $ 7.66