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Pension, Profit Sharing & Other Post-Retirement Benefits (Narrative) (Details) (USD $)
In Millions, unless otherwise specified
0 Months Ended 3 Months Ended 9 Months Ended
Sep. 28, 2013
Sep. 28, 2013
Sep. 29, 2012
Sep. 28, 2013
Sep. 29, 2012
Defined Benefit Plan Disclosure [Line Items]          
Pension and profit sharing expense charged to operations   $ 1.9 $ 2.4 $ 6.2 $ 6.5
Pension Plans, Defined Benefit [Member]
         
Defined Benefit Plan Disclosure [Line Items]          
Estimated future employer contributions in Current Fiscal Year 3.2        
Contributions by employer       2.9  
Net periodic benefit cost   0.3 0.4 1.0 1.2
Other Postretirement Benefit Plans, Defined Benefit [Member]
         
Defined Benefit Plan Disclosure [Line Items]          
Net periodic benefit cost   $ 0 $ 0 $ 0 $ 0