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ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Activity for Each Component of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
AOCI Attributable to Parent, Net of Tax      
Beginning balance $ 5,806.7    
Ending balance 6,650.0 $ 5,806.7  
Total Accumulated Other Comprehensive Loss      
AOCI Attributable to Parent, Net of Tax      
Beginning balance (254.9) (157.7) $ (161.1)
Other comprehensive (loss) income before reclassifications 71.7 (19.3) 10.7
Amounts reclassified from accumulated other comprehensive loss (72.4) (72.8) 15.2
Deferred income tax (expense) benefit 12.8 (5.1) (22.5)
Ending balance (242.8) (254.9) (157.7)
Foreign Currency Translation Adjustments      
AOCI Attributable to Parent, Net of Tax      
Beginning balance (218.8) (172.5) (122.4)
Other comprehensive (loss) income before reclassifications 6.9 (33.9) (39.2)
Amounts reclassified from accumulated other comprehensive loss (6.9) (7.0) (6.4)
Deferred income tax (expense) benefit 4.3 (5.4) (4.5)
Ending balance (214.5) (218.8) (172.5)
Unrealized (Loss) Gain on Hedges      
AOCI Attributable to Parent, Net of Tax      
Beginning balance 23.8 29.7 (27.7)
Other comprehensive (loss) income before reclassifications 43.3 75.2 66.3
Amounts reclassified from accumulated other comprehensive loss (72.8) (84.5) 12.0
Deferred income tax (expense) benefit 6.4 3.4 (20.9)
Ending balance 0.7 23.8 29.7
Unrealized Gain (Loss) on Available-for-sale Investments      
AOCI Attributable to Parent, Net of Tax      
Beginning balance (65.6) (6.9) 8.6
Other comprehensive (loss) income before reclassifications 32.6 (77.9) (29.2)
Amounts reclassified from accumulated other comprehensive loss 8.1 18.8 8.6
Deferred income tax (expense) benefit 0.1 0.4 5.1
Ending balance (24.8) (65.6) (6.9)
Unrealized Pension (Costs) Credits      
AOCI Attributable to Parent, Net of Tax      
Beginning balance 5.7 (8.0) (19.6)
Other comprehensive (loss) income before reclassifications (11.1) 17.3 12.8
Amounts reclassified from accumulated other comprehensive loss (0.8) (0.1) 1.0
Deferred income tax (expense) benefit 2.0 (3.5) (2.2)
Ending balance $ (4.2) $ 5.7 $ (8.0)