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Restructuring Costs - Narrative (Details) - USD ($)
$ in Thousands
3 Months Ended 6 Months Ended
Aug. 30, 2020
Feb. 23, 2020
Nov. 29, 2020
Nov. 24, 2019
Restructuring Cost and Reserve [Line Items]        
Proceeds from sales of property and equipment     $ 12,885 $ 29
Gain on sale of property     34 $ 15
Expected restructuring costs     29,000  
Salad Dressing Plant In Ontario, California        
Restructuring Cost and Reserve [Line Items]        
Proceeds from sales of property and equipment     4,900  
Gain on sale of property     $ 2,800  
Impairment of assets held for sale   $ 10,900    
Manufacturing Operations in Hanover, Pennsylvania        
Restructuring Cost and Reserve [Line Items]        
Impairment of assets held for sale $ 8,800