Income Taxes - Income Tax Provision Reconciliation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 28, 2014	Sep. 29, 2013	Sep. 28, 2014	Sep. 29, 2013
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	$ (3.9)	$ (3.3)	$ (25.2)	$ (7.7)
State and foreign taxes, net of federal tax benefit and valuation allowance	(0.7)	0	0.1	1.6
Nondeductible expenses and other	0.5	0	1.3	0.4
Impact of deferred tax liabilities for indefinite-lived assets	(0.2)	0.2	2.9	2.9
Decrease in reserves for uncertain tax positions	(3.2)	(0.1)	(0.1)	(1.7)
Increase in federal valuation allowance	7.3	3.4	24.7	7.4
Total income tax provision (benefit)	(0.2)	0.2	3.7	2.9
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense			$ 0.1	$ 0.1