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Debt Senior Credit Agreement (Details)
3 Months Ended
Sep. 09, 2015
USD ($)
Oct. 29, 2016
USD ($)
Jul. 30, 2016
USD ($)
Line of Credit Facility [Line Items]      
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum   3.50  
Letters of credit outstanding amount   $ 57,600,000  
Debt Instrument, Covenant Compliance, Consolidated Interest Coverage Ratio, Maximum   3.00  
Additional borrowing availability   $ 324,400,000 $ 392,400,000
Standby Letters of Credit      
Line of Credit Facility [Line Items]      
Line of credit current borrowing capacity $ 200,000,000    
Letters of credit outstanding amount   $ 57,600,000 $ 57,600,000
Credit Agreement - Term Loan (matures April 2020)      
Line of Credit Facility [Line Items]      
Debt Instrument, Face Amount $ 350,000,000    
Debt Instrument, Covenant Compliance, Consolidated Leverage Ratio, Maximum 2.25    
Credit Agreement - Revolving facility (matures April 2020)      
Line of Credit Facility [Line Items]      
Line of credit current borrowing capacity $ 450,000,000