Commitments and Contingencies (Detail) - USD ($) $ in Millions	1 Months Ended
Sep. 30, 2020	Mar. 31, 2020
Commitments and Contingencies Disclosure [Abstract]
Purchase commitments	$ 545.7	$ 64.7
Long-term Purchase Commitment, Period	5 years
Long-term Purchase Commitment, Amount	$ 500.0

Period covered by the long-term purchase commitment, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

No definition available.

Name:	us-gaap_LongtermPurchaseCommitmentPeriod
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration