Income Taxes (Interest Expense On Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
May 27, 2018	May 28, 2017	May 29, 2016
Income Tax Disclosure [Abstract]
Interest expense on unrecognized tax benefits	$ 0.8	$ 0.6	$ 0.5

Amount of interest expense for an underpayment of income taxes.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319

Name:	us-gaap_UnrecognizedTaxBenefitsInterestOnIncomeTaxesExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration