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INCOME TAXES - Changes in Unrecognized Tax Benefits (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]      
Balance at beginning of year $ 29.3 $ 26.7 $ 23.9
Changes in tax positions related to      
Current year 5.5 8.9 7.7
Prior years, increase 1.3    
Prior years, decrease   (1.0) (2.6)
Expired statute of limitations (0.7) (5.3) (2.3)
Balance at end of year $ 35.4 $ 29.3 $ 26.7