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COMMITMENTS and CONTINGENCIES (Details)
3 Months Ended 12 Months Ended 93 Months Ended
Jul. 25, 2020
USD ($)
Oct. 27, 2018
USD ($)
Jul. 25, 2020
union
Jul. 25, 2020
USD ($)
Commitments and Contingencies Disclosure [Abstract]        
Insurance recoveries | $ $ 2,733,000 $ 415   $ 6,730
Concentration Risk [Line Items]        
Number of unions | union     7  
Expiration period of union contracts     1 year  
Labor Force Concentration Risk | Workforce Subject to Collective Bargaining Arrangements        
Concentration Risk [Line Items]        
Percentage of employees covered by collective bargaining agreements, significant     90.00%  
Unionized Employees Concentration Risk | Workforce Subject to Collective Bargaining Arrangements Expired or Expiring within One Year        
Concentration Risk [Line Items]        
Percentage of employees covered by collective bargaining agreements, insignificant     31.00%