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

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Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Convertible Senior Notes - Carrying Value of the 2024 Notes (Detail) - USD ($)	Jan. 29, 2022	Oct. 20, 2021	Jan. 30, 2021	Sep. 30, 2019
Liability component
Principal		$ 2,000,000,000
Convertible senior notes due 2024
Liability component
Principal	$ 219,638,000		$ 350,000,000	$ 350,000,000
Less: Debt discount	(30,341,000)		(65,818,000)	$ (3,500,000)
Net carrying amount	189,297,000		284,182,000
Equity component	$ 54,754,000		$ 87,252,000