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Contingencies (Narrative) (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 29, 2015
Mar. 31, 2013
Dec. 25, 2011
Nov. 02, 2011
Dec. 28, 2008
Commitments and Contingencies Disclosure [Abstract]          
Loss contingency accrual         $ 5.7
Estimated litigation liability       $ 6.6  
Loss contingency accrual, provision     $ 0.9    
Benefit due to reversal of accrued litigation reserve   $ 6.6      
Loss contingency, damages sought $ 65.0