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Summary of Restricted Stock Unit Activity (Detail) - USD ($)		12 Months Ended
		Jan. 31, 2021	Feb. 02, 2020	Feb. 03, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Released, shares		(170,308)
Granted, weighted average grant date fair value		$ 59.51	$ 58.18	$ 49.57
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at February 2, 2020		2,884,194
Granted, shares		1,145,610
Granted, with vesting subject to performance conditions, shares		267,000
Released, shares	[1]	(1,061,159)
Cancelled, shares		(116,761)
Balance at January 31, 2021		3,118,884	2,884,194
Vested plus expected to vest at January 31, 2021		2,773,871
Balance at February 2, 2020, weighted average grant date fair value		$ 54.09
Granted, weighted average grant date fair value		51.67
Granted, with vesting subject to performance conditions, weighted average grant date fair value		93.17
Released, weighted average grant date fair value	[1]	53.96
Cancelled, weighted average grant date fair value		53.08
Balance at January 31, 2021, weighted average grant date fair value		56.62	$ 54.09
Vested plus expected to vest at February 2, 2020, weighted average grant date fair value		$ 56.61
Weighted average contractual term remaining (years)		3 years 18 days
Vested plus expected to vest at January 31, 2021, weighted average contractual term remaining (years)		3 years 5 months 1 day
Balance at January 31, 2021,Intrinsic Value		$ 402,087,000
Vested plus expected to vest at January 31, 2021,Intrinsic Value		$ 357,607,000
[1] Excludes 170,308 incremental shares released due to achievement of performance conditions above target.

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The number of equity-based payment instruments, excluding stock (or unit) options, that were forfeited during the reporting period.

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