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STOCK-BASED COMPENSATION - Equity Awards (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
 3 Months Ended 12 Months Ended
Dec. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Employee Stock Option              
STOCK-BASED COMPENSATION              
Weighted-average grant-date fair value of options granted (in dollars per share)         $ 18.28 $ 11.74 $ 12.90
Total intrinsic value of options exercised         $ 333.5 $ 68.2 $ 51.2
Cash received from option exercises         $ 130.3 $ 64.0 $ 45.7
Stock units expected to vest (in shares) 24,215       24,215    
Total unrecognized compensation expense related to non-vested shares granted to employees $ 96.3       $ 96.3    
Cost expected to be recognized over a weighted-average period         3 years    
Restricted Stock Units, and Performance Share Units              
STOCK-BASED COMPENSATION              
Stock units expected to vest (in shares) 1,900       1,900    
Total unrecognized compensation expense related to non-vested shares granted to employees $ 32.0       $ 32.0    
Cost expected to be recognized over a weighted-average period         1 year 2 months 12 days    
Number of Shares              
Non-vested at the beginning of the period (in shares)       2,026 2,026    
Granted (in shares) 8 2 22 523      
Vested (in shares)         (595)    
Forfeited/cancelled (in shares)         (22)    
Non-vested at the end of the period (in shares) 1,964       1,964 2,026  
Weighted Average Grant-Date Fair Value              
Non-vested at the beginning of the period (in dollars per share)       $ 36.27 $ 36.27    
Granted (in dollars per share) $ 51.99 $ 56.38 $ 59.70 $ 48.49      
Vested (in dollars per share)         32.84    
Forfeited/cancelled (in dollars per share)         32.49    
Non-vested at the end of the period (in dollars per share) $ 40.95       40.95 $ 36.27  
Restricted Stock Units, and/or Performance Share Units              
Weighted Average Grant-Date Fair Value              
Granted (in dollars per share)         $ 51.24 $ 37.13 $ 44.56
Performance Share Units              
STOCK-BASED COMPENSATION              
Percentage of target performance         100.00%    
Performance Share Units | Minimum              
STOCK-BASED COMPENSATION              
Percentage of target performance         0.00%    
Performance Share Units | Maximum              
STOCK-BASED COMPENSATION              
Percentage of target performance         200.00%    
Other Share-Based Awards              
STOCK-BASED COMPENSATION              
Total unrecognized compensation expense related to non-vested shares granted to employees $ 0.3       $ 0.3    
Cost expected to be recognized over a weighted-average period         1 year