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Income Taxes (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
3 Months Ended 6 Months Ended
Jul. 01, 2011
Jul. 02, 2010
Jul. 01, 2011
Jul. 02, 2010
Income Taxes        
Income tax benefit (expense) $ 3.3 $ (20.3) $ 9.1 $ (16.7)
Federal statutory rate     35.00%  
Income tax benefit due to the reversal of tax accruals $ 2.8   $ 6.2