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Income Taxes - Additional Information (Detail) - USD ($)	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 01, 2015	Aug. 02, 2014	Aug. 01, 2015	Aug. 02, 2014	Jan. 31, 2015
Income Taxes [Line Items]
Effective income tax rate	38.00%	37.70%	38.00%	37.70%
Net unrecognized tax benefits			$ 34,800,000	$ 28,100,000	$ 32,700,000
Accrued amounts for interest and penalties	$ 10,900,000	$ 8,800,000	10,900,000	$ 8,800,000	$ 10,100,000
Minimum
Income Taxes [Line Items]
Possible decrease in unrecognized tax benefits that would reduce the provision for taxes on earnings	0		0
Maximum
Income Taxes [Line Items]
Possible decrease in unrecognized tax benefits that would reduce the provision for taxes on earnings	$ 15,500,000		$ 15,500,000

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Income Taxes [Line Items]

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Amount of decrease reasonably possible in the next twelve months for the unrecognized tax benefit.

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount accrued for interest on an underpayment of income taxes and penalties related to a tax position claimed or expected to be claimed in the tax return.

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