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SHARE-BASED AWARDS - Stock-Based Compensation Expense (Details)
$ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
marketConditionAward
shares
Dec. 31, 2020
USD ($)
shares
Dec. 31, 2019
USD ($)
shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation expense $ 536 $ 38 $ 13
Options that have fully satisfied the time-based vesting condition (in shares) | shares   0 0
Market Condition Award      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of awards with market conditions satisfied | marketConditionAward 2    
Accelerated recognition of stock-based compensation expense $ 2    
Market Condition Award | Executive Officer      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Grant date fair value for awards 22    
Stock-based compensation expense $ 290 $ 20  
Market Condition Award | Executive Officer | Minimum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Requisite service period 6 months    
Market Condition Award | Executive Officer | Maximum      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Requisite service period 3 years    
Unvested Stock Options and Restricted Shares      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Unamortized stock-based compensation $ 628    
Unamortized stock-based compensation period (in years) 2 years 10 months 24 days    
RSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Options that have fully satisfied the time-based vesting condition (in shares) | shares 24,005,000