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Share-Based Compensation - Narratives (Details) - USD ($)
$ in Millions
1 Months Ended 12 Months Ended
May 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Unearned compensation costs related to awards granted   $ 105    
Unearned compensation cost, expected to be recognized over period   1 year 4 months 24 days    
Vesting period   3 years    
2015 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in shares)   0    
2018 Plan        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in shares)   3,148,831    
RSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Service period   3 years    
Vesting period   3 years    
Number of share-equivalents issued (in shares)   134,419    
PSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Service period   3 years    
Vesting period   3 years    
Number of share-equivalents issued (in shares)   38,393    
SARs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Fair value grants of SARs     $ 6 $ 5
Intrinsic value of SARs exercised   $ 69 60 58
Fair value vested   5 8 9
Reflexis Replacement Options        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Intrinsic value of SARs exercised   4 1  
Fair value vested   $ 5 2  
Fair value grants     9  
Cash-settled Awards        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period   3 years    
Share-based liabilities paid   $ 11 $ 9 $ 6
Number of shares that became available under the plan (in shares)   11,644 40,166 17,207
Employee Stock | 2020 ESPP        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares available for grant (in shares)   1,448,956    
Number of shares that became available under the plan (in shares) 1,500,000      
Purchase price equal to lesser of fair market value percentage 95.00%      
RSAs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Service period   3 years    
Number of share-equivalents issued (in shares)   6,005 178,150 170,502
PSAs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Service period   3 years    
Number of share-equivalents issued (in shares)   0 98,820 150,224
Class A Common Stock | Non-employee directors        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of share-equivalents issued (in shares)   2,877 6,314 7,371