DEBT - Interest and Other, Net (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
Interest expense	$ 41.0	$ 31.1	$ 116.1	$ 96.9
2024 Notes
Debt Instrument [Line Items]
Interest expense	0.0	2.8	0.0	12.2
2025 Notes
Debt Instrument [Line Items]
Interest expense	5.3	5.3	16.0	16.0
2026 Notes
Debt Instrument [Line Items]
Interest expense	6.9	6.2	20.6	17.8
2027 Notes
Debt Instrument [Line Items]
Interest expense	5.6	5.6	16.7	16.7
2028 Notes
Debt Instrument [Line Items]
Interest expense	9.9	6.2	29.7	17.7
2029 Notes
Debt Instrument [Line Items]
Interest expense	4.1	0.0	8.9	0.0
2032 Notes
Debt Instrument [Line Items]
Interest expense	5.0	5.0	15.0	15.0
2034 Notes
Debt Instrument [Line Items]
Interest expense	4.2	0.0	9.2	0.0
Term Loan
Debt Instrument [Line Items]
Interest expense	$ 0.0	$ 0.0	$ 0.0	$ 1.5