Leases - Cash Paid (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 27, 2021	Jun. 28, 2020	Jun. 27, 2021	Jun. 28, 2020
Leases [Abstract]
Finance lease - cash paid for interest	$ 0.7	$ 0.7	$ 1.3	$ 1.3
Finance lease - financing cash flows	0.2	0.1	0.4	0.3
Operating lease - operating cash flows (fixed payments)	$ 3.0	$ 3.2	$ 5.8	$ 7.3