Other Intangible Assets and Goodwill (Estimated Future Amortization Expense) (Details) - USD ($) $ in Millions	Jun. 28, 2020	Sep. 29, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year	$ 58.2
Finite-Lived Intangible Assets, Amortization Expense, Year Two	213.3
Finite-Lived Intangible Assets, Amortization Expense, Year Three	177.8
Finite-Lived Intangible Assets, Amortization Expense, Year Four	19.5
Finite-Lived Intangible Assets, Amortization Expense, Year Five	18.9
Finite-Lived Intangible Assets, Amortization Expense, after Year Five	15.3
Finite-Lived Intangible Assets, Net	$ 503.0	$ 578.4