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Pension Plans and Postretirement Benefits (Narrative) (Details) - USD ($)
3 Months Ended
Apr. 03, 2016
Mar. 29, 2015
Jan. 03, 2016
Defined Benefit Plan Disclosure [Line Items]      
Pension plan curtailment   $ 1,200,000  
Contributions by employer by during period $ 0 0  
Estimated contributions in current fiscal year 0    
Pension Plan      
Defined Benefit Plan Disclosure [Line Items]      
Net expense (income) $ (500,000) (200,000)  
Pension Benefits - U.S. Plans      
Defined Benefit Plan Disclosure [Line Items]      
Discount rate used to determine the benefit obligation 4.91%   4.50%
Pension Benefits Allocated to Contracts Pursuant to U.S. Government Cost Accounting Standards      
Defined Benefit Plan Disclosure [Line Items]      
Pension expense allocated to contracts pursuant to U.S. Government Cost Accounting Standards $ 3,500,000 $ 3,500,000