Restructuring and Related Charges (Schedule of Net Restructuring and Related Charges) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 25, 2020	Sep. 27, 2019	Sep. 25, 2020	Sep. 27, 2019
Restructuring Cost and Reserve
Total charges expected to be settled in cash	$ 3.2	$ 7.2	$ 15.8	$ 11.2
Restructuring Fiscal 2018 Plan
Restructuring Cost and Reserve
Restructuring and related charges, net	3.2	6.7	17.8	9.3
Restructuring Fiscal 2016 Plan
Restructuring Cost and Reserve
Restructuring and related charges, net	0.0	0.5	(0.1)	2.7
Acquisitions
Restructuring Cost and Reserve
Restructuring and related charges, net	$ 0.0	$ 0.0	$ (1.9)	$ (0.8)