Restructuring and Related Charges (Schedule of Restructuring Charges Incurred Cumulative to Date) (Details) $ in Millions	Sep. 25, 2020 USD ($)
Restructuring Fiscal 2016 Plan
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	$ 111.5
Restructuring Fiscal 2016 Plan | Specialty Brands
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	68.1
Restructuring Fiscal 2016 Plan | Specialty Generics
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	14.6
Restructuring Fiscal 2016 Plan | Corporate
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	28.8
Restructuring Fiscal 2018 Plan
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	32.8
Restructuring Fiscal 2018 Plan | Specialty Brands
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	3.0
Restructuring Fiscal 2018 Plan | Specialty Generics
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	10.1
Restructuring Fiscal 2018 Plan | Corporate
Restructuring Cost and Reserve
Restructuring costs incurred cumulative to date	$ 19.7