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Debt - Additional Information (Details) - Convertible Senior Notes Due 2027 - USD ($) $ / shares in Units, $ in Millions	2 Months Ended	3 Months Ended	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Mar. 31, 2021	Mar. 31, 2021	Mar. 31, 2022
Debt
Face amount	$ 420.0
Interest rate (as percent)	1.125%
Net proceeds	$ 408.6
Interest expense		$ 1.2	$ 2.8
Carrying amount of the liability component	$ 294.6
Discount rate (as percent)	6.50%
Fair value of the liability component	$ 125.4
Debt issuance costs	$ 11.4
Accretion of debt discount		3.6	8.3
Amortization of debt issuance costs		$ 0.2	$ 0.4
Effective interest percentage (as percent)		6.40%	6.40%
Period prior to maturity date where noteholders may convert their notes at their election prior to the maturity date	2 days
Conversion rate	18.9109
Conversion price (in dollars per share)	$ 52.88
Upper strike price (in dollars per share)	$ 86.174
Capped call transaction	$ 60.4
Forecast
Debt
Accretion of debt discount				$ 15.2
Amortization of debt issuance costs				$ 0.8

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Represents the upper strike price of the capped call transaction entered in connection with the convertible debt instrument.

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The carrying amount of the liability component of convertible debt.

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Period prior to the maturity date in which the noteholders may convert their notes at their election after the threshold date.

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Represents the discount rate on debt instrument.

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The amount of interest expenses recorded relating to accretion of debt discount.

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Amount of amortization expense attributable to debt issuance costs.

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The price per share of the conversion feature embedded in the debt instrument.

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Ratio applied to the conversion of debt instrument into equity with equity shares divided by debt principal amount.

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Face (par) amount of debt instrument at time of issuance.

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Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Amount of the cost of borrowed funds accounted for as interest expense for debt.

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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The cash inflow during the period from additional borrowings in aggregate debt. Includes proceeds from short-term and long-term debt.

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