For entities that net deferred tax assets and tax liabilities, represents the unclassified net amount of deferred tax assets and liabilities as of the balance sheet date, which result from applying the applicable enacted tax rate to net temporary differences and carryforwards pertaining to assets or liabilities. A temporary difference is a difference between the tax basis of an asset or liability and its carrying amount in the financial statements prepared in accordance with generally accepted accounting principles that will reverse in ensuing periods.

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A ratio calculated by dividing the reported amount of income tax expense attributable to continuing operations for the period by GAAP-basis pretax income from continuing operations.

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- Definition

This element represents the total of accruals as of the date of the statement of financial position for interest recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties for a tax position claimed or expected to be claimed by the entity, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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- Definition

This element represents the total of interest expense recognized for an underpayment of income taxes computed by applying the applicable statutory rate of interest to the difference between a tax position recognized for financial reporting purposes and the amount previously taken or expected to be taken in a tax return of the entity and the amount of statutory penalties in the period in which the entity claims or expects to claim a tax position, in its tax return, that does not meet the minimum statutory threshold to avoid payment of penalties.

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Income Taxes (Details) (USD $) In Millions, unless otherwise specified	6 Months Ended
	Jun. 26, 2011	Jun. 27, 2010	Dec. 26, 2010
Effective tax rate	302.90%	26.20%
Net deferred tax assets	$ 60.9		$ 61.5
Total amount of gross unrecognized tax benefits that, if recognized, would affect the effective tax rate	12.2		12.8
Interest and penalties expense	0	0.4
Accrued interest and penalties related to unrecognized tax benefits	3.6		3.6
Expected change of gross unrecognized benefits, minimum	3.4
Expected change of gross unrecognized benefits, maximum	5.3
Maximum [Member] \| United States [Member]
Open tax years currently under audit	2008
Maximum [Member] \| Germany [Member]
Open tax years currently under audit	2005
Maximum [Member] \| Finland [Member]
Open tax years currently under audit	2009
Maximum [Member] \| Sweden [Member]
Open tax years currently under audit	2009
Minimum [Member] \| United States [Member]
Open tax years currently under audit	2007
Minimum [Member] \| Germany [Member]
Open tax years currently under audit	2002
Minimum [Member] \| Finland [Member]
Open tax years currently under audit	2005
Minimum [Member] \| Sweden [Member]
Open tax years currently under audit	2007
Jurisdiction One [Member]
Net deferred tax assets			41.8
Jurisdiction Two [Member]
Net deferred tax assets			$ 10.1