Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 29, 2024	Dec. 31, 2023	Dec. 25, 2022
Federal income taxes:
Current	$ 0.0	$ 0.0	$ 0.0
Deferred	7.1	2.4	(4.5)
Total Federal	7.1	2.4	(4.5)
State and local income taxes:
Current	1.8	1.1	(0.6)
Deferred	(2.7)	0.3	1.9
Total State and local	(0.9)	1.4	1.3
Foreign income taxes:
Current	4.2	5.1	3.9
Deferred	(0.2)	(0.2)	(0.5)
Total Foreign	4.0	4.9	3.4
Total	$ 10.2	$ 8.7	$ 0.2