Debt (Details) - USD ($)	Dec. 03, 2016	May 28, 2016
Line of Credit Facility [Line Items]
Long-term debt	$ 219,600,000	$ 221,900,000
Borrowings on revolver and outstanding letters of credit	28,100,000	30,700,000
Revolving Line of Credit, Domestic
Line of Credit Facility [Line Items]
Long-term debt	19,700,000	22,000,000.0
Revolving line of credit, maximum borrowing capacity	400,000,000
Revolving line of credit, allowed increase in borrowing capacity	200,000,000
Letters of Credit Outstanding, Amount	$ 8,400,000	$ 8,700,000