Income Taxes - Income Tax Provision Reconciliation (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 25, 2012
Income Tax Expense (Benefit), Continuing Operations, Income Tax Reconciliation [Abstract]
Federal statutory income tax rate	35.00%	35.00%
Income tax benefit at federal statutory rate	$ (1.8)	$ (2.3)
State and foreign taxes, net of federal benefit and valuation allowance	0.9	(3.0)
Nondeductible expenses and other	0.1	0.5
Impact of indefinite lived deferred tax liabilities and state law changes	1.9	(1.0)
Increase/(Decrease) in reserves for uncertain tax positions	0.1	(0.1)
Increase/(Decrease) in federal valuation allowance	1.6	1.8
Total	$ 2.8	$ (4.1)