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Discontinued Operations (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended
Mar. 31, 2012
Mar. 26, 2011
Dec. 31, 2011
Discontinued Operations and Disposal Groups [Abstract]      
Adjustments to indemnity liabilities due to changes in estimates, foreign exchange gains and losses, and accretion expense $ 0.1 $ 0.3  
Discontinued operations 0.3   0.3
Disposal Group Including Discontinued Operation, Current, Legal Reserves $ 4.9   $ 4.8