Income Taxes (Narrative) (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2011	Jan. 01, 2011
Income Tax Contingency [Line Items]
Increase (decrease) in valuation allowance primarily related to changes in deferred tax assets	$ 0.3	$ (0.1)
Liability for uncertain tax positions	0.4
Liability for uncertain tax positions of unrecognized tax benefit that would impact effective tax rate	0.3
Accrued interest related to uncertain tax positions	0.1	0.1
Foreign [Member]
Income Tax Contingency [Line Items]
Undistributed earnings of foreign subsidiaries	35.5	30.9
Additional taxes payable on undistributed foreign earnings	9.2
Operating loss carryforwards	3.9
Expiration dates of operating loss carryforwards	2012 to 2024
State [Member]
Income Tax Contingency [Line Items]
Operating loss carryforwards	$ 29.1
Expiration dates of operating loss carryforwards	2012 to 2030
Tax years subject to audit	2007 through 2011