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Other Intangible Assets and Goodwill (Estimated Future Amortization Expense) (Details) - USD ($)
$ in Millions
Sep. 27, 2020
Sep. 29, 2019
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]    
2021 $ 218.8  
2022 183.5  
2023 19.8  
2024 19.2  
2025 13.3  
Thereafter 2.5  
Net Carrying Amount $ 457.1 $ 578.4