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Segment Information (Narrative) (Details)
$ in Millions
3 Months Ended
Dec. 26, 2020
USD ($)
segment
Dec. 28, 2019
USD ($)
Segment Reporting Information [Line Items]    
Number of operating segments | segment 1  
Fluid dairy [Member]    
Segment Reporting Information [Line Items]    
Sales eliminated in consolidation | $ $ 12.3 $ 11.5