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ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME, NET (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2024
Jun. 30, 2024
Mar. 31, 2024
Sep. 30, 2025
AOCI Rollforward              
Beginning balance $ 4,665.1 $ 4,452.1 $ 4,279.6 $ 4,021.7 $ 4,024.1 $ 3,985.0 $ 4,279.6
Other comprehensive income (17.8) 67.2 23.6 44.2 (3.2) (13.8) 73.0
Ending balance 4,884.9 4,665.1 4,452.1 4,208.3 4,021.7 4,024.1 4,884.9
Accumulated other comprehensive (loss) income, net              
AOCI Rollforward              
Beginning balance 42.4 (24.8) (48.4) (26.4) (23.2) (9.4) (48.4)
Other comprehensive income (17.8) 67.2 23.6 44.2 (3.2) (13.8)  
Ending balance 24.6 $ 42.4 (24.8) $ 17.8 $ (26.4) $ (23.2) 24.6
Foreign Currency Translation Adjustment              
AOCI Rollforward              
Beginning balance     (48.6)       (48.6)
Other comprehensive income             72.9
Ending balance 24.3           24.3
Post-Retirement Benefits, Net              
AOCI Rollforward              
Beginning balance     $ 0.2       0.2
Other comprehensive income             0.1
Ending balance $ 0.3           $ 0.3