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STOCK-BASED COMPENSATION PLANS - Narrative (Details) - USD ($)
$ / shares in Units, $ 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]      
Realized tax benefits $ 10 $ 20 $ 24
Tax benefit associated with stock-based compensation expense 5 3 10
Cash portion of RSU paid 11    
Fair value of restricted stock units vested 34 80 $ 91
DCPD      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Net liability recognized $ 9 $ 7  
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unrecognized cost, period for recognition 3 years 3 years 3 years
Granted (in dollars per share) $ 35.50 $ 44.42 $ 41,230,000
Unrecognized cost $ 29    
Performance-based Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Award paid in stock (percent) 66.67%    
Award paid in cash (percent) 33.33%    
Liability recognized $ 24    
Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation award vesting period 2 years    
Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation award vesting period 10 years    
ICP 2020      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum limit of total stock awards (in shares) 10,000,000    
Stock-based compensation award number of shares available for future 12,700,000    
ICP 2015      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Maximum limit of total stock awards (in shares) 10,000,000    
Stock-based compensation award number of shares available for future 0    
401(k) Savings Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares authorized for issuance 1,000,000 1,000,000