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Long-Term Debt - Narrative (Details) - Credit Agreement - USD ($)
3 Months Ended
Nov. 25, 2017
Apr. 11, 2016
LIBOR    
Debt Instrument [Line Items]    
Basis points 0.75%  
Revolving Credit Facility    
Debt Instrument [Line Items]    
Maximum borrowing capacity   $ 250,000,000.0
Maturity date Apr. 11, 2021  
Outstanding borrowings $ 0  
Outstanding letters of credit 77,600,000  
Amount available for borrowing $ 172,400,000