Income Taxes (Effective Income Tax Rate Reconciliation) (Details)	12 Months Ended
May 28, 2017	May 29, 2016	May 31, 2015
Income Tax Disclosure [Abstract]
U.S. statutory rate	35.00%	35.00%	35.00%
State and local income taxes, net of federal tax benefits	1.70%	1.20%	(6.60%)
Benefit of federal income tax credits	(9.20%)	(12.50%)	(34.00%)
Other, net	(3.20%)	(3.70%)	(6.40%)
Effective income tax rate	24.30%	20.00%	(12.00%)

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

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 13
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32698-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
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-Section S99
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Percentage of domestic federal statutory tax rate applicable to pretax income (loss).

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Percentage of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to other adjustments.

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