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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Unrecognized compensation costs $ 77 $ 91
Stock Option    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award vesting period (in years) 3 years  
Award vesting period in event of retirement (in years) 1 year  
Cost not yet recognized, period for recognition 2 years  
Restricted Stock Units (RSUs)    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award vesting period (in years) 3 years  
Award vesting period in event of retirement (in years) 1 year  
Performance Shares    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Award vesting period (in years) 3 years  
Award vesting period in event of retirement (in years) 1 year  
Award requisite service period (in years) 3 years