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Income Taxes Unrecognized Tax Benefits (Details) (USD $)
In Millions, unless otherwise specified
6 Months Ended 3 Months Ended 6 Months Ended
Jun. 30, 2013
Dec. 30, 2012
Jun. 24, 2012
MEXICO
Jun. 30, 2013
MEXICO
Feb. 15, 2013
MEXICO
Income Tax Examination [Line Items]          
Unrecognized Tax Benefits, Reductions Resulting from Lapse of Applicable Statute of Limitations     $ 6.3    
Income Tax Examination, Liability (Refund) Adjustment from Settlement with Taxing Authority         0.3
Unrecognized Tax Benefits, Period Increase (Decrease) 0.4        
Unrecognized Tax Benefits 11.7 11.3      
Unrecognized Tax Benefits, Increases Resulting from Current Period Tax Positions 1.0        
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense 0.4        
Unrecognized Tax Benefits, Decreases Resulting from Settlements with Taxing Authorities 0.9        
Unrecognized Tax Benefits, Decreases Resulting from Foreign Currency Translation       $ 0.1