Income Taxes - Income Tax Provision Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 26, 2017	Mar. 27, 2016
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory income tax rate (percent)	35.00%	35.00%
Income tax benefit at federal statutory rate	$ (2.9)	$ (6.5)
State and foreign taxes, net of federal tax benefit and valuation allowance	0.2	0.4
Nondeductible expenses and other	0.4	0.4
Impact of deferred tax liabilities for indefinite-lived assets	1.2	1.5
Increase in reserves for uncertain tax positions	0.1	1.7
Increase in federal valuation allowance	2.5	6.1
Total income tax provision	$ 1.5	$ 3.6