v3.22.0.1
Stockholders' Equity - SAR and Option Activity (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-Based Compensation Arrangement By Share-Based Payment Award, Options And Equity Instruments Other Than Options, Nonvested, Number Of Shares [Abstract]    
Weighted-Average Exercise Price Per Share, Outstanding (in dollars per share) $ 12.87  
Weighted-Average Exercise Price Per Share, Awards granted (in dollars per share) 5.13  
Weighted-Average Exercise Price Per Share, Awards exercised (in dollars per share) 10.81  
Weighted-Average Exercise Price Per Share, Awards canceled and forfeited (in dollars per share) 17.14  
Weighted-Average Exercise Price Per Share, Outstanding (in dollars per share) 11.84 $ 12.87
Weighted-Average Exercise Price Per Share, Vested and expected to vest (in dollars per share) 8.10  
Weighted-Average Exercise Price Per Share, Exercisable (in dollars per share) $ 8.10  
Share-Based Compensation Arrangement By Share-based Payment Award, Options And Equity Instruments Other Than Options, Nonvested, Additional Disclosures [Abstract]    
Weighted-Average Contractual Life, Outstanding 4 years 4 months 6 days 4 years 11 months 19 days
Weighted-Average Contractual Life, Vested and expected to vest 3 years 6 months 18 days  
Weighted-Average Contractual Life, Exercisable 3 years 6 months 18 days  
Aggregate Intrinsic Value, Outstanding $ 735 $ 1,104
Aggregate Intrinsic Value, Vested and expected to vest 593  
Aggregate Intrinsic Value, Exercisable $ 593  
Stock Appreciation Rights (SARs)    
Share-based Compensation Arrangement by Share-based Payment Award, Non-Option Equity Instruments, Outstanding [Roll Forward]    
Awards, outstanding (in shares) 229  
Awards granted (in shares) 0  
Awards exercised (in shares) (65)  
Awards canceled and forfeited (in shares) (7)  
Awards, outstanding (in shares) 157 229
Vested and expected to vest (in shares) 134  
Exercisable (in shares) 134  
Stock options    
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]    
Options outstanding (in shares) 28,734  
Awards granted (in shares) 5,457  
Exercise of stock options (in shares) (9,380)  
Awards canceled and forfeited (in shares) (558)  
Options outstanding (in shares) 24,253 28,734
Vested and expected to vest (in shares) 17,411  
Exercisable (in shares) 17,411