Leases - Summary of Components of Lease Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 27, 2024	Dec. 29, 2023
Leases [Abstract]
Operating lease cost	$ 32.1	$ 25.6
Short-term lease cost	2.5	2.7
Sublease income	(0.8)	(0.4)
Total lease cost	33.8	27.9
Operating cash flows used in operating leases	$ 29.9	$ 24.0
Weighted-average remaining lease term – operating leases	9 years 9 months 18 days	10 years 1 month 6 days
Weighted-average discount rate – operating leases	7.20%	6.70%