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STOCK-BASED COMPENSATION - Equity Awards (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2023
Jun. 30, 2024
Jun. 30, 2023
Employee Stock Option          
STOCK-BASED COMPENSATION          
Weighted-average grant-date fair value of options granted (in dollars per share) $ 19.52   $ 21.14 $ 22.64 $ 18.25
Total intrinsic value of options exercised $ 10.2   $ 26.9    
Cash received from option exercises $ 13.7   23.3 $ 52.1 $ 59.7
Stock units expected to vest (in shares) 26,202     26,202  
Total unrecognized compensation expense related to non-vested shares granted to employees $ 162.4     $ 162.4  
Cost expected to be recognized over a weighted-average period       3 years 4 months 24 days  
Restricted Stock Units, and Performance Share Units          
STOCK-BASED COMPENSATION          
Expected to vest over 1,600     1,600  
Total unrecognized compensation expense related to non-vested shares granted to employees $ 43.9     $ 43.9  
Cost expected to be recognized over a weighted-average period       1 year 7 months 6 days  
Number of Shares          
Non-vested at the beginning of the period (in shares)   1,964   1,964  
Granted (in shares) 27 502      
Vested (in shares)       (824)  
Forfeited/cancelled (in shares)       (1)  
Non-vested at the end of the period (in shares) 1,668     1,668  
Weighted Average Grant-Date Fair Value          
Non-vested at the beginning of the period (in dollars per share)   $ 40.95   $ 40.95  
Granted (in dollars per share) $ 49.12 $ 57.04      
Vested (in dollars per share)       40.69  
Forfeited/cancelled (in dollars per share)       30.62  
Non-vested at the end of the period (in dollars per share) $ 46.06     $ 46.06  
Restricted Stock Units, and/or Performance Share Units          
STOCK-BASED COMPENSATION          
Total unrecognized compensation expense related to non-vested shares granted to employees $ 57.8   $ 157.9 $ 57.8 $ 157.9
Weighted Average Grant-Date Fair Value          
Granted (in dollars per share) $ 49.12   $ 59.17 $ 59.58 $ 48.93
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 $ 0.1     $ 0.1  
Cost expected to be recognized over a weighted-average period       6 months