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STOCK-BASED COMPENSATION - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Tax benefit related to stock-based compensation     $ 40 $ 37 $ 30
Restricted stock units and performance share units aggregate grant-date fair value     490 421 392
Aggregate fair value of performance share units and restricted stock units vested during the period     $ 400 395 358
Options aggregate grant-date fair value         $ 79
Weighted-average grant-date fair value per option (in dollars per share)         $ 485
Executive Officers          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Number of stock options granted (in shares)         0
Performance Share Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     3 years    
Performance Share Units | Personnel Expenses          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Increase (decrease) in stock-based compensation expense due to significant decline in estimated performance due to the impact of COVID-19 pandemic   $ (73)      
Performance Share Units | Certain Performance Share Units 2022 and 2021 Grants          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     2 years    
Performance Share Units | Certain Performance Share Units 2022 and 2021 Grants | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     1 year    
Performance Share Units | 2018 Grants          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Additional stock-based compensation expense to be recognized over the remaining requisite service period $ 11        
Performance Share Units | 2018 and 2019 Grants | Executive Officers          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Additional stock-based compensation expense to be recognized over the remaining requisite service period       $ 40  
Restricted Stock Units and Performance Share Units          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Total future compensation cost related to unvested share-based awards     $ 519    
Total future compensation cost related to unvested share-based awards, expected period of recognition     1 year 9 months 18 days    
Restricted Stock Units | Minimum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     1 year    
Restricted Stock Units | Maximum          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Vesting period     3 years    
Stock Options          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Grant term (in years)         10 years
1999 Plan          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available to be issued under the plan (in shares)     1,226,245    
Other plans assumed in acquisitions          
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]          
Shares available to be issued under the plan (in shares)     18,865