Summary of Restricted Stock Unit Activity (Parenthetical) (Detail)	3 Months Ended
	May 03, 2020 shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock units grant date to be determined	267,000
Restricted Stock Units (RSUs) [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental shares released due to achievement of performance conditions	954,419	[1]
Restricted Stock Units (RSUs) [Member] | Achievement [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Incremental shares released due to achievement of performance conditions	170,308

[1] Excludes 170,308 incremental shares released due to achievement of performance conditions above target.