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ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS), NET (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
AOCI Rollforward      
Beginning balance $ 3,604.8 $ 3,348.9 $ 3,355.6
Other comprehensive loss (86.6) (19.4) 37.4
Ending balance 3,465.3 3,604.8 3,348.9
Accumulated other comprehensive income (loss), net.      
AOCI Rollforward      
Beginning balance 55.6 75.0 37.6
Other comprehensive loss (86.6) (19.4) 37.4
Ending balance (31.0) 55.6 75.0
Foreign Currency Translation Adjustment      
AOCI Rollforward      
Beginning balance 55.4 74.7  
Other comprehensive loss (85.6) (19.3)  
Ending balance (30.2) 55.4 74.7
Unrealized Investment Gain/Loss      
AOCI Rollforward      
Beginning balance (0.1) (0.1)  
Other comprehensive loss (0.8)    
Ending balance (0.9) (0.1) (0.1)
Post-Retirement Benefits      
AOCI Rollforward      
Beginning balance 0.3 0.4  
Other comprehensive loss (0.2) (0.1)  
Ending balance $ 0.1 $ 0.3 $ 0.4