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STOCK-BASED COMPENSATION PLANS - RSUS (Details) - 2016 Plan [Member] - Restricted Stock Units (RSUs) [Member] - 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]      
Nonvested options recognized over weighted average period, years 2 years 2 months 23 days    
Unrecognized compensation on nonvested stock options $ 273    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Non-vested at beginning of period, 3,396,523 3,240,065 3,657,873
Granted 992,854 1,551,675 1,200,202
Vested (1,123,547) (1,001,101) (1,160,333)
Forfeited (308,293) (394,116) (457,677)
Non-vested at end of period, 2,957,536 3,396,523 3,240,065
Weighted average grant date fair value per share [Abstract]      
Non-vested at beginning of period, $ 148.23 $ 143.07 $ 125.35
Granted 214.61 158.52 162.43
Vested 144.34 117.84 104.32
Forfeited 156.74 145.42 134.50
Non-vested at end of period, $ 171.73 $ 148.23 $ 143.07
Income Statement Impact From RSUs [Abstract]      
Compensation expense $ 162 $ 118 $ 106
Future income tax benefit recognized $ 23 $ 24 $ 21
Minimum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting periods 3 years    
Maximum [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Vesting periods 6 years