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STOCK COMPENSATION - Restricted Stock Units Narrative (Details) - Restricted Stock Units (RSUs) - USD ($)
$ / shares in Units, shares in Millions, $ 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]      
Equity instrument granted in period, weighted average grant date fair value (in dollars per share) $ 59.56 $ 67.60 $ 50.44
Award requisite service period 3 years    
Total unrecognized compensation cost related to award, weighted average period 16 months    
Restricted stock units, unvested (in shares) 1.1 1.2  
Equity instrument, granted (in shares) 0.5    
Vested or forfeited (in shares) 0.6    
Total compensation cost for award recognized in income $ 32 $ 29 $ 28
Total compensation cost for award recognized in income, tax benefit $ 8 $ 8 $ 7
One-year vesting period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost related to award, weighted average period 1 year    
Two-year vesting period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost related to award, weighted average period 2 years    
Three-year vesting period      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Total unrecognized compensation cost related to award, weighted average period 3 years