Leases - Cash Paid (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
	Sep. 29, 2019	Sep. 29, 2019	Sep. 30, 2018
Leases [Abstract]
Finance lease - cash paid for interest	$ 0.6	$ 1.9
Finance lease - financing cash flows	0.1	0.4	$ 0.0
Operating lease - operating cash flows (fixed payments)	$ 3.6	$ 10.9