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Summary of Restricted Stock Unit Activity (Detail) - USD ($)		12 Months Ended
		Feb. 02, 2020	Feb. 03, 2019	Jan. 28, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Released, shares		(105,436)
Granted, weighted average grant date fair value		$ 58.18	$ 49.57	$ 52.76
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at February 3, 2019, shares		3,012,923
Granted, shares		1,066,337
Granted, with vesting subject to performance conditions, shares		240,515
Released, shares		(1,029,288)
Cancelled, shares		(406,293)
Balance at February 3, 2019, shares		2,884,194	3,012,923
Vested plus expected to vest at February 3, 2019, shares		2,335,826
Balance at February 3, 2019, weighted average grant date fair value			$ 54.09	52.88
Granted, weighted average grant date fair value		$ 58.27
Granted, with vesting subject to performance conditions, weighted average grant date fair value		57.77
Released, weighted average grant date fair value		55.94
Cancelled, weighted average grant date fair value		53.89
Balance at February 3, 2019, weighted average grant date fair value			$ 54.09	$ 52.88
Vested plus expected to vest at February 3, 2019, weighted average grant date fair value		$ 54.04
Weighted average contractual term remaining (years)		3 years
Vested plus expected to vest at February 3, 2019, weighted average contractual term remaining (years)		3 years 1 month 28 days
Balance at February 3, 2019	[1]	$ 202,124,000
Vested plus expected to vest at February 3, 2019	[1]	$ 163,695,000
[1] Intrinsic value for outstanding and unvested restricted stock units is based on the market value of our common stock on the last business day of the fiscal year (or $70.08).

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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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