Income Taxes (Details) (USD $) In Millions, unless otherwise specified	9 Months Ended
	Sep. 29, 2013	Sep. 23, 2012	Dec. 30, 2012
Income Taxes [Line Items]
Effective tax rate	42.60%	0.90%
Net deferred tax assets	$ 17.8		$ 17.9
Current income tax receivable	4.6		0.5
Estimated tax payments	8.0
Income tax expense	3.9
Current deferred tax liability	2.5
Unrecognized tax benefit, if recognized, would affect the effective tax rate	14.7		16.3
Interest and penalties benefit	0.2	0.7
Accrued interest and penalties related to unrecognized tax benefits	4.0		4.3
Expected change of gross unrecognized tax benefits, minimum	2.6
Expected change of gross unrecognized tax benefits, maximum	$ 4.2
United States [Member]
Income Taxes [Line Items]
Open tax years currently under audit	2011
India [Member]
Income Taxes [Line Items]
Open tax years currently under audit	2010
Maximum [Member]
Income Taxes [Line Items]
Income Tax Holiday, Termination Date	2017
Maximum [Member] | Germany [Member]
Income Taxes [Line Items]
Open tax years currently under audit	2009
Maximum [Member] | Finland [Member]
Income Taxes [Line Items]
Open tax years currently under audit	2009
Minimum [Member]
Income Taxes [Line Items]
Income Tax Holiday, Termination Date	2015
Minimum [Member] | Germany [Member]
Income Taxes [Line Items]
Open tax years currently under audit	2006
Minimum [Member] | Finland [Member]
Income Taxes [Line Items]
Open tax years currently under audit	2008