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Stock-Based Compensation (Valuation Assumptions) (Details) - $ / shares
6 Months Ended
Jul. 01, 2016
Jul. 03, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]    
Weighted average fair value $ 9.41 $ 12.18
Risk-free interest rate 1.58% 1.55%
Expected volatility 26.00% 26.00%
Expected life (in years) 5 years 5 years
Expected dividend yield 0.00% 0.00%