Leases - Lease Expense (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 28, 2020	Mar. 30, 2019
Leases [Abstract]
Operating leases	[1]	$ 11.4	$ 12.0
Finance leases
Amortization		1.1	0.7
Interest		0.2	0.1
Total finance leases		$ 1.3	$ 0.8

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