Leases - Lease Expense (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 27, 2020	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Leases [Abstract]
Operating leases	[1]	$ 11.2	$ 11.2	$ 23.7	$ 23.2
Finance leases
Amortization		1.1	0.7	2.2	1.3
Interest		0.2	0.1	0.4	0.2
Total finance leases		$ 1.3	$ 0.8	$ 2.6	$ 1.5

[1] (1) Includes short-term leases and variable lease costs, which are immaterial.