CONSOLIDATED STATEMENTS OF COMPREHENSIVE (LOSS) INCOME - USD ($) $ in Millions	12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Mar. 31, 2021
Statement of Comprehensive Income [Abstract]
Net (loss) income	$ (1,124.7)	$ 418.0	$ 588.9
Other comprehensive (loss) income
Foreign currency translation adjustment	(58.9)	(43.6)	51.3
Cash flow hedges:
Change in unrealized gains	0.0	0.0	(3.8)
Reclassification to earnings	0.0	0.0	(1.9)
Tax effect on effective cash flow hedges	0.0	0.0	0.8
Change in fair value of cash flow hedges	0.0	0.0	(4.9)
Change in fair value of available-for-sale securities	2.9	(5.1)	3.4
Other comprehensive (loss) income	(56.0)	(48.7)	49.8
Comprehensive (loss) income	$ (1,180.7)	$ 369.3	$ 638.7