ACCUMULATED OTHER COMPREHENSIVE (LOSS) INCOME (Details) - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	$ 3,809.7
Other comprehensive (loss) income before reclassifications	(56.0)	$ (48.7)
Ending balance	9,042.5	3,809.7
Foreign currency translation adjustments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(52.8)	(9.2)
Other comprehensive (loss) income before reclassifications	(58.9)	(43.6)
Ending balance	(111.7)	(52.8)
Unrealized gain (loss) on derivative instruments
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0.0	0.0
Other comprehensive (loss) income before reclassifications	0.0	0.0
Ending balance	0.0	0.0
Unrealized gain (loss) on cross-currency swap
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	0.0	0.0
Other comprehensive (loss) income before reclassifications	0.0	0.0
Ending balance	0.0	0.0
Unrealized gain (loss) on available- for-sales securities
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(4.5)	0.6
Other comprehensive (loss) income before reclassifications	2.9	(5.1)
Ending balance	(1.6)	(4.5)
Total
AOCI Attributable to Parent, Net of Tax [Roll Forward]
Beginning balance	(57.3)	(8.6)
Ending balance	$ (113.3)	$ (57.3)