Quarterly report pursuant to Section 13 or 15(d)

Stock-Based Compensation (Narrative) (Details)

v3.21.2
Stock-Based Compensation (Narrative) (Details) - USD ($)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Sep. 30, 2021
Sep. 30, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum shares of common stock to be awarded 15.7   15.7  
Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Available for Grant 11.3   11.3  
Stock-based compensation $ 8 $ 6 $ 24 $ 14
Payment of taxes for net share settlement     $ 9 $ 2
Share-based Compensation Arrangement by Share-based Payment Award, Discount from Market Price, Offering Date     10.00%  
Stock Issued During Period, Shares, Employee Stock Purchase Plans     0.1 0.1
Employee Stock Ownership Plan (ESOP), Compensation Expense     $ 1 $ 1
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture     $ 34 35
Vesting terms, in years     4 years  
PSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture     $ 7 8
Vesting terms, in years     3 years  
NQs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares Granted, Value, Share-based Payment Arrangement, before Forfeiture     $ 2 $ 8
Vesting terms, in years     4 years