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Debt - Long-term Debt, Net (Details) - USD ($) $ in Millions	Sep. 30, 2022	Mar. 31, 2022
Debt Instrument [Line Items]
Total	$ 2,952.9
Unamortized discount and issuance costs	(17.4)
Long-term debt, net	2,935.5	$ 0.0
Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 2,793.3
2024 Notes
Debt Instrument [Line Items]
Annual Interest Rate	3.30%
Total	$ 1,000.0
2024 Notes \| Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 974.2
2025 Notes
Debt Instrument [Line Items]
Annual Interest Rate	3.55%
Total	$ 600.0
2025 Notes \| Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 574.8
2027 Notes
Debt Instrument [Line Items]
Annual Interest Rate	3.70%
Total	$ 600.0
2027 Notes \| Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 557.2
2032 Notes
Debt Instrument [Line Items]
Annual Interest Rate	4.00%
Total	$ 500.0
2032 Notes \| Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 434.2
2022 Credit Agreement
Debt Instrument [Line Items]
Annual Interest Rate	4.84%
Total	$ 200.0
2022 Credit Agreement \| Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 200.0
2024 Convertible Notes
Debt Instrument [Line Items]
Annual Interest Rate	0.25%
Total	$ 23.5
2024 Convertible Notes \| Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 23.5
2026 Convertible Notes
Debt Instrument [Line Items]
Annual Interest Rate	0.00%
Total	$ 29.4
2026 Convertible Notes \| Significant other observable inputs (level 2)
Debt Instrument [Line Items]
Total	$ 29.4