Income Taxes - Schedule of Income before Income Tax, Domestic and Foreign (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 25, 2022	Dec. 26, 2021
Components of income (loss) from continuing operations before income taxes
Domestic	$ (9.6)	$ (48.4)	$ (6.7)
Foreign	20.7	15.7	11.1
Income (loss) from continuing operations before income taxes	$ 11.1	$ (32.7)	$ 4.4