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Borrowings and Credit Arrangements - Interest Expense Senior Notes (Details) - USD ($)
$ in Millions
3 Months Ended
Dec. 25, 2021
Dec. 26, 2020
Sep. 28, 2020
Line of Credit Facility [Line Items]      
Interest expense $ 13.0 $ 15.1  
Senior Notes | 2028 Senior Notes      
Line of Credit Facility [Line Items]      
Stated interest rate 4.625%    
Interest expense $ 4.8 4.8  
Senior Notes | 2025 Senior Notes      
Line of Credit Facility [Line Items]      
Stated interest rate 4.375%    
Interest expense $ 0.0 2.3  
Senior Notes | 2029 Senior Notes      
Line of Credit Facility [Line Items]      
Stated interest rate 3.25%   3.25%
Interest expense $ 8.2 $ 8.0