Effective Income Tax Rate Reconciliation, Refundable Alternative Minimum Tax Credit Requested, Amount, CARES Act

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Income Taxes [Line Items]

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Tax Cuts And Jobs Act Of 2017, Transition Tax For Accumulated Foreign Earnings, Income Tax Expense (Benefit)

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Tax Cuts and Jobs Act of 2017, Change in Tax Rate, Income Tax Benefit (Expense), Federal, Increase (Decrease), Amount

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Amount of deferred tax assets for which it is more likely than not that a tax benefit will not be realized.

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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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Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended	12 Months Ended
Income Taxes (Details) - USD ($) $ in Millions	May 02, 2020	May 04, 2019	May 02, 2020	Aug. 03, 2019
Income Taxes [Line Items]
Refundable AMT credit requested	$ 1.4		$ 1.4
Valuation Allowance		$ 5.2
Reduction in valuation allowance	$ 2.0
Effective tax rate (percent)	(0.90%)		(1.20%)	26.00%
Federal
Income Taxes [Line Items]
Increase in federal transition tax		2.3
Transition Tax		26.9
State
Income Taxes [Line Items]
Transition Tax		0.9
Increase in state transition tax		$ 0.2