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STOCK-BASED COMPENSATION - Plan Information and P&L Impact (Details)
shares in Millions, $ in Millions
12 Months Ended
Dec. 31, 2021
USD ($)
plan
shares
Dec. 31, 2020
USD ($)
Dec. 31, 2019
USD ($)
STOCK-BASED COMPENSATION      
Number of active plans | plan 1    
Income tax benefit related to non-cash compensation $ 14.1 $ 11.4 $ 12.2
Excess tax benefit, including state taxes, in income tax expense $ 11.7 $ 2.5 $ 17.1
Equity Award Plan      
STOCK-BASED COMPENSATION      
Number of shares authorized | shares 6.7    
Term of plan 10 years