Income Taxes - Income Tax Provision Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 28, 2020	Jun. 30, 2019	Jun. 28, 2020	Jun. 30, 2019
Income Tax Disclosure [Abstract]
Income tax expense (benefit) at federal statutory rate	$ (0.5)	$ 0.8	$ (0.8)	$ 1.3
State and foreign taxes, net of federal tax benefit and valuation allowance	(0.4)	1.0	(0.7)	1.2
Release of valuation allowance due to acquisitions	0.0	0.0	(0.9)	(3.4)
Nondeductible expenses and other	(1.2)	0.3	(1.3)	0.4
Impact of deferred tax liabilities for indefinite-lived assets	(0.6)	0.2	(0.6)	0.3
Increase (decrease) in reserves for uncertain tax positions	(0.8)	1.3	(1.0)	2.9
Increase (decrease) in federal valuation allowance	1.7	(1.1)	2.1	(1.7)
Provision (benefit) for income taxes from continuing operations	$ (1.8)	$ 2.5	$ (3.2)	$ 1.0