Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021
Federal income taxes:
Current	$ 0.0	$ 0.0	$ 0.0
Deferred	2.4	(4.5)	(0.1)
Total Federal	2.4	(4.5)	(0.1)
State and local income taxes:
Current	1.3	0.6	1.5
Deferred	0.3	1.9	0.5
Total State and local	1.6	2.5	2.0
Foreign income taxes:
Current	5.1	3.9	2.9
Deferred	(0.2)	(0.5)	(0.9)
Total Foreign	4.9	3.4	2.0
Total	$ 8.9	$ 1.4	$ 3.9