Leases - Cash Paid (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Leases [Abstract]
Finance lease - cash paid for interest	$ 0.7	$ 0.6	$ 1.3	$ 1.2
Finance lease - financing cash flows	0.1	0.1	0.3	0.2
Operating lease - operating cash flows (fixed payments)	$ 3.2	$ 4.0	$ 7.3	$ 7.3