ACCUMULATED OTHER COMPREHENSIVE LOSS - Schedule of Activity for Each Component of Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Mar. 31, 2024
AOCI Attributable to Parent, Net of Tax
Beginning balance	$ 10,191.6	$ 10,062.9	$ 7,186.4	$ 6,719.4
Other comprehensive income (loss) before reclassifications	(2.7)	6.9	29.3	27.5
Amounts reclassified from accumulated other comprehensive loss	(31.4)	(28.9)	(13.3)	(6.4)
Deferred income tax benefit (expense)	24.5	12.0	(2.9)	(11.6)
Ending balance	10,606.5	10,191.6	7,504.6	7,186.4
Accumulated Other Comprehensive Loss
AOCI Attributable to Parent, Net of Tax
Beginning balance	(254.5)	(244.5)	(233.3)	(242.8)
Ending balance	(264.1)	(254.5)	(220.2)	(233.3)
Foreign Currency Translation Adjustments
AOCI Attributable to Parent, Net of Tax
Beginning balance	(257.7)	(274.1)	(240.6)	(214.5)
Other comprehensive income (loss) before reclassifications	39.1	16.1	3.4	(23.3)
Amounts reclassified from accumulated other comprehensive loss	(1.5)	(1.7)	(1.8)	(1.7)
Deferred income tax benefit (expense)	6.0	2.0	(0.6)	(1.1)
Ending balance	(214.1)	(257.7)	(239.6)	(240.6)
Unrealized Gain (Loss) on Hedges
AOCI Attributable to Parent, Net of Tax
Beginning balance	10.1	37.7	27.6	0.7
Other comprehensive income (loss) before reclassifications	(61.8)	(27.6)	21.8	43.4
Amounts reclassified from accumulated other comprehensive loss	(10.9)	(10.2)	(12.5)	(7.2)
Deferred income tax benefit (expense)	18.8	10.2	(2.4)	(9.3)
Ending balance	(43.8)	10.1	34.5	27.6
Unrealized Loss on Available-for-sale Investments
AOCI Attributable to Parent, Net of Tax
Beginning balance	(2.9)	(4.0)	(16.4)	(24.8)
Other comprehensive income (loss) before reclassifications	20.1	18.3	4.2	7.0
Amounts reclassified from accumulated other comprehensive loss	(19.0)	(17.0)	1.0	2.5
Deferred income tax benefit (expense)	(0.3)	(0.2)	0.1	(1.1)
Ending balance	(2.1)	(2.9)	(11.1)	(16.4)
Unrealized Pension Costs
AOCI Attributable to Parent, Net of Tax
Beginning balance	(4.0)	(4.1)	(3.9)	(4.2)
Other comprehensive income (loss) before reclassifications	(0.1)	0.1	(0.1)	0.4
Amounts reclassified from accumulated other comprehensive loss	0.0	0.0	0.0	0.0
Deferred income tax benefit (expense)	0.0	0.0	0.0	(0.1)
Ending balance	$ (4.1)	$ (4.0)	$ (4.0)	$ (3.9)