Income Taxes - Income Tax Provision Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 25, 2023	Jun. 30, 2024	Jun. 25, 2023
Income Tax Disclosure [Abstract]
Income tax expense (benefit) at federal statutory rate	$ 2.7	$ 0.4	$ 3.5	$ (0.7)
Nondeductible expenses and other	2.4	1.7	5.0	3.3
Stock compensation - excess tax shortfalls (windfalls)	(0.1)	0.3	(0.6)	0.7
Federal impact of research & development tax credits	(0.2)	(0.2)	(0.4)	(0.4)
Provision for income taxes	$ 4.8	$ 2.2	$ 7.5	$ 2.9