Annual report pursuant to Section 13 and 15(d)

Organization and Significant Accounting Policies - Investments, Additional Information (Details)

v3.21.2
Organization and Significant Accounting Policies - Investments, Additional Information (Details)
$ in Millions
12 Months Ended
Sep. 25, 2021
USD ($)
company
Sep. 26, 2020
USD ($)
Sep. 28, 2019
USD ($)
Schedule of Equity Method Investments [Line Items]      
Number of unconsolidated companies | company 12    
Equity (loss) income $ (1.4) $ 3.9 $ 1.2
Investment in unconsolidated companies $ 12.2 $ 13.1  
Minimum      
Schedule of Equity Method Investments [Line Items]      
Owned percentage in unconsolidated entities 3.00%    
Maximum      
Schedule of Equity Method Investments [Line Items]      
Owned percentage in unconsolidated entities 50.00%