XML 126 R103.htm IDEA: XBRL DOCUMENT v3.22.0.1
Stock-based Compensation - Restricted Stock Awards and Restricted Stock Unit Awards (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total fair value of awards vested during the period $ 139 $ 126 $ 118
Restricted Stock and Restricted Stock Units      
Summary of restricted stock and restricted stock unit activity      
Nonvested at the beginning of the period (in shares) 21,508    
Granted (in shares) 13,908 17,800 9,800
Vested (in shares) (11,161)    
Forfeited (in shares) (1,828)    
Nonvested at the end of the period (in shares) 22,427 21,508  
Weighted-Average Grant Date Fair Value      
Nonvested at the beginning of the period (in dollars per share) $ 12.37    
Granted (in dollars per share) 13.95 $ 12.08 $ 12.41
Vested (in dollars per share) 13.56    
Forfeited (in dollars per share) 12.58    
Nonvested at the end of the period (in dollars per share) $ 12.74 $ 12.37  
Restricted Stock and Restricted Stock Units | Service conditions      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years    
Restricted Stock and Restricted Stock Units | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of target award (as a percent) 0.00%    
Restricted Stock and Restricted Stock Units | Minimum | Services conditions and either market or performance conditions      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 2 years    
Restricted Stock and Restricted Stock Units | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Percentage of target award (as a percent) 200.00%    
Restricted Stock and Restricted Stock Units | Maximum | Services conditions and either market or performance conditions      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting period 3 years