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Income Taxes (Narrative) (Details) - USD ($) $ in Millions	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended		12 Months Ended
	May 26, 2018	Feb. 24, 2018	Dec. 31, 2017	May 26, 2018	May 26, 2018	May 27, 2017	Aug. 25, 2018
Federal corporate income tax rate			35.00%	21.00%
Effective income tax rate					28.20%	33.90%
Tax cuts and jobs act of 2017, provisional income tax expense (benefit)	$ 0.2	$ 1.4
Unrecognized tax benefits	1.7			$ 1.7	$ 1.7
Unrecognized tax benefits that would have an impact on effective tax rate	1.5			1.5	1.5
Unrecognized tax benefits, income tax penalties and interest accrued	$ 0.5			$ 0.5	$ 0.5
Scenario, Forecast [Member]
Federal corporate income tax rate							26.00%

X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Amount of unrecognized tax benefits.

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

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Tax Cuts And Jobs Act Of 2017, Incomplete Accounting, Change In Tax Rate, Deferred Tax Asset, Provisional Income Tax Expense (Benefit)

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