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Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended		12 Months Ended
	Aug. 02, 2014	Aug. 03, 2013	Aug. 02, 2014	Aug. 03, 2013	Feb. 01, 2014
Income Taxes [Line Items]
Effective income tax rate	37.70%	37.90%	37.70%	38.00%
Net unrecognized tax benefits	$ 28.1	$ 127.8	$ 28.1	$ 127.8	$ 26.2
Interest and penalties expensed			8.8	40.1	8.1
Possible decrease in unrecognized tax benefits that would reduce the provision for taxes on earnings, minimum	0		0
Possible decrease in unrecognized tax benefits that would reduce the provision for taxes on earnings, maximum	$ 11.5		$ 11.5

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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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 740

-SubTopic 10

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The estimated lower bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken.

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The estimated upper bound of the reasonably possible change in the total amount of the unrecognized tax benefit (that will significantly increase or decrease within twelve months of the balance sheet date) for a tax position taken.

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Amount of expense 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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The total amount of unrecognized tax benefits that, if recognized, would affect the effective tax rate.

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