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Note 6 - Goodwill and Other Identifiable Intangible Assets (Details Textual) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Nov. 26, 2023
Nov. 27, 2022
Aug. 28, 2022
Nov. 26, 2023
Nov. 27, 2022
Goodwill, Impairment Loss     $ 141.7 $ 20.7  
Finite-Lived Intangible Assets, Remaining Amortization Period (Year) 18 years     18 years  
Amortization of Intangible Assets $ 13.3 $ 14.7   $ 26.8 $ 29.5
Finite-Lived Intangible Asset, Expected Amortization, Year One 45.5     45.5  
Finite-Lived Intangible Asset, Expected Amortization, Year Two 45.5     45.5  
Finite-Lived Intangible Asset, Expected Amortization, Year Three 45.5     45.5  
Finite-Lived Intangible Asset, Expected Amortization, Year Four 45.5     45.5  
Finite-Lived Intangible Asset, Expected Amortization, Year Five $ 45.5     $ 45.5  
Selling, General and Administrative Expenses [Member] | Refrigerated And Frozen [Member]          
Goodwill, Impairment Loss     141.7    
Selling, General and Administrative Expenses [Member] | Refrigerated And Frozen [Member] | Trade Names [Member]          
Impairment of Intangible Assets, Indefinite-Lived (Excluding Goodwill)     $ 244.0