Leases - Cash Paid (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 26, 2021	Dec. 27, 2020	Dec. 29, 2019
Leases [Abstract]
Finance lease - cash paid for interest	$ 2.7	$ 2.6
Finance lease - financing cash flows	1.0	0.6	$ 0.5
Operating lease - operating cash flows (fixed payments)	$ 11.8	$ 12.7