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

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Name:	us-gaap_DebtInstrumentConvertibleConversionRatio1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:pureItemType
Balance Type:	na
Period Type:	duration

Indebtedness - Additional Information (Detail) $ in Millions	Nov. 14, 2017	Mar. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)
Debt Instrument [Line Items]
Debt instrument, conversion rate	0.013621
2024 Convertible Notes [Member]
Debt Instrument [Line Items]
Debt Instrument Fair Value		$ 749.3	$ 846.1