Income Taxes - Income Tax Provision Reconciliation (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory income tax rate	35.00%	35.00%	35.00%	35.00%
Income tax benefit at federal statutory rate	$ (4.1)	$ (4.0)	$ (13.0)	$ (24.4)
State and foreign taxes, net of federal tax benefit and valuation allowance	(2.8)	(0.8)	(2.0)	(0.2)
Nondeductible expenses and other	(0.3)	0.6	0.5	1.4
Impact of deferred tax liabilities for indefinite-lived assets	(0.3)	(0.2)	3.0	2.6
Increase (decrease) in reserves for uncertain tax positions	0.3	(3.2)	0.4	(0.2)
Increase (decrease) in federal valuation allowance	(8.1)	7.4	0.0	23.9
Total income tax provision (benefit)	$ (15.3)	$ (0.2)	$ (11.1)	$ 3.1