CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOW (PARENTHETICAL) - USD ($) shares in Millions, $ in Millions	1 Months Ended	9 Months Ended
	Dec. 31, 2020	Dec. 31, 2020	Dec. 31, 2019
Supplemental disclosure of cash flow information:
Payments on settlement of convertible debt		$ 2,252.2	$ 0.0
Long-term Debt
Supplemental disclosure of cash flow information:
Extinguishment of debt, amount	$ 1,086.5
Payments on settlement of convertible debt	$ 428.9
Shares issued to settle convertible debt (in shares)	8.4
Long-term Debt | 2020 Senior Convertible Debt
Supplemental disclosure of cash flow information:
Debt conversion, converted instrument amount	$ 665.5