Income Taxes - Components of Income Taxes (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 25, 2022	Dec. 26, 2021	Dec. 27, 2020
Federal income taxes:
Current	$ 0.0	$ 0.0	$ 0.0
Deferred	(4.5)	(0.1)	(68.2)
Total Federal	(4.5)	(0.1)	(68.2)
State and local income taxes:
Current	0.6	1.5	0.5
Deferred	1.9	0.5	(9.4)
Total State and local	2.5	2.0	(8.9)
Foreign income taxes:
Current	3.9	2.9	4.2
Deferred	(0.5)	(0.9)	(0.6)
Total Foreign	3.4	2.0	3.6
Total	$ 1.4	$ 3.9	$ (73.5)