Stockholders' Equity - Schedule of Accumulated Other Comprehensive (Loss) Income (Parenthetical) (Detail) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Oct. 29, 2022	Oct. 30, 2021	Oct. 29, 2022	Oct. 30, 2021
Net Unrealized (Losses) Gains on Available-for-Sale Debt Securities [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive (loss) income, before reclassification tax	$ (2.2)	$ (1.6)	$ (5.3)	$ (2.4)
Accumulated Other Comprehensive (Loss) Income [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other comprehensive loss (income), tax	$ 0.1	$ 0.2	$ 0.1	$ 0.4

Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration