Restructuring and Related Charges (Schedule of Net Restructuring and Related Charges) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 25, 2021	Jun. 26, 2020	Jun. 25, 2021	Jun. 26, 2020
Restructuring Cost and Reserve
Restructuring and related charges, net	$ 6.7	$ 14.4	$ 7.8	$ 12.6
Restructuring and Related Costs, Non-cash Charges, Including Accelerated Depreciation	(1.5)	0.0	(2.6)	0.0
Total charges expected to be settled in cash	5.2	14.4	5.2	12.6
Restructuring Fiscal 2018 Plan
Restructuring Cost and Reserve
Restructuring and related charges, net	6.7	14.5	7.8	14.6
Restructuring Fiscal 2016 Plan
Restructuring Cost and Reserve
Restructuring and related charges, net	0.0	(0.1)	0.0	(0.1)
Acquisitions
Restructuring Cost and Reserve
Restructuring and related charges, net	$ 0.0	$ 0.0	$ 0.0	$ (1.9)