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Summary of Restricted Stock Unit Activity (Detail) - USD ($)		12 Months Ended
		Feb. 03, 2019	Jan. 28, 2018	Jan. 29, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, weighted average grant date fair value		$ 49.57	$ 52.76	$ 59.17
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Balance at January 28, 2018, shares		2,358,137
Granted, shares		1,432,954
Granted, with vesting subject to performance conditions, shares		256,350
Released, shares		(677,251)
Cancelled, shares		(357,267)
Balance at February 3, 2019, shares		3,012,923	2,358,137
Vested plus expected to vest at January 28, 2018 shares		2,389,343
Balance at January 28, 2018, weighted average grant date fair value		$ 58.18
Granted, weighted average grant date fair value		49.72
Granted, with vesting subject to performance conditions, weighted average grant date fair value		48.76
Released, weighted average grant date fair value		59.47
Cancelled, weighted average grant date fair value		60.48
Balance at February 3, 2019, weighted average grant date fair value		52.88	$ 58.18
Vested plus expected to vest at February 3, 2019, weighted average grant date fair value		$ 52.74
Weighted average contractual term remaining (years)		3 years 11 days
Vested plus expected to vest at February 3, 2018, weighted average contractual term remaining (years)		3 years 1 month 6 days
Balance at February 3, 2019	[1]	$ 162,698,000
Vested plus expected to vest at February 3, 2019	[1]	$ 129,025,000
[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 $0).

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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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