Other Comprehensive Earnings (Loss) - Tax Effects on Changes in Other Comprehensive (Loss) Earnings (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Other comprehensive (loss) earnings, tax effect:
Tax benefit on unrealized holding gains	$ 0.0	$ 0.0	$ 0.1
Tax (expense) benefit on cash flow hedging activities	(3.8)	2.8	(1.3)
Tax benefit (expense) on changes in unrecognized pension amounts	0.5	0.0	(5.9)
Reclassifications to earnings, tax effect:
Tax (expense) benefit on hedging activities	(0.3)	(1.9)	1.6
Tax benefit (expense) on amortization of unrecognized pension and postretirement amounts	0.1	0.1	(0.3)
Total tax (expense) benefit on other comprehensive (loss) earnings	$ (3.5)	$ 1.0	$ (5.8)