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ACCUMULATED OTHER COMPREHENSIVE LOSS - Summary of Activity for Each Component of Accumulated Other Comprehensive Loss (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss), Net of Tax      
Beginning balance $ 4,574.3 $ 4,148.3 $ 3,140.4
Ending balance 5,835.9 4,574.3 4,148.3
Foreign Currency Translation Adjustments      
Accumulated Other Comprehensive Income (Loss), Net of Tax      
Beginning balance (122.4) (154.8) (143.6)
Other comprehensive (loss) income before reclassifications (39.2) 35.7 (1.5)
Amounts reclassified from accumulated other comprehensive loss (6.4) (6.4) (6.6)
Deferred income tax (expense) benefit (4.5) 3.1 (3.1)
Ending balance (172.5) (122.4) (154.8)
Unrealized Gain (Loss) on Hedges      
Accumulated Other Comprehensive Income (Loss), Net of Tax      
Beginning balance (27.7) 12.5 23.6
Other comprehensive (loss) income before reclassifications 66.3 (34.8) 27.9
Amounts reclassified from accumulated other comprehensive loss 12.0 (19.2) (44.2)
Deferred income tax (expense) benefit (20.9) 13.8 5.2
Ending balance 29.7 (27.7) 12.5
Unrealized (Loss) Gain on Available-for-sale Investments      
Accumulated Other Comprehensive Income (Loss), Net of Tax      
Beginning balance 8.6 1.7 (5.0)
Other comprehensive (loss) income before reclassifications (29.2) 8.0 7.9
Amounts reclassified from accumulated other comprehensive loss 8.6 0.3 0.4
Deferred income tax (expense) benefit 5.1 (1.4) (1.6)
Ending balance (6.9) 8.6 1.7
Unrealized Pension Costs      
Accumulated Other Comprehensive Income (Loss), Net of Tax      
Beginning balance (19.6) (15.4) (13.5)
Other comprehensive (loss) income before reclassifications 12.8 (5.5) (3.2)
Amounts reclassified from accumulated other comprehensive loss 1.0 0.9 0.7
Deferred income tax (expense) benefit (2.2) 0.4 0.6
Ending balance (8.0) (19.6) (15.4)
Total Accumulated Other Comprehensive Loss      
Accumulated Other Comprehensive Income (Loss), Net of Tax      
Beginning balance (161.1) (156.0) (138.5)
Other comprehensive (loss) income before reclassifications 10.7 3.4 31.1
Amounts reclassified from accumulated other comprehensive loss 15.2 (24.4) (49.7)
Deferred income tax (expense) benefit (22.5) 15.9 1.1
Ending balance $ (157.7) $ (161.1) $ (156.0)