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Stock-Based Compensation (Valuation Assumptions) (Details) (USD $)
3 Months Ended 9 Months Ended
Sep. 26, 2014
Rate
Sep. 27, 2013
Rate
Sep. 26, 2014
Rate
Sep. 27, 2013
Rate
Employee Stock [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected Term     1 year 0 months 0 days 1 year 0 months 0 days
Expected stock price volatility     25.50% 31.20%
Risk-free interest rate     0.10% 0.10%
Dividend yield     1.90% 1.30%
Weighted-average estimated fair value     $ 7.68 $ 8.41
Restricted Stock Units (RSUs) [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Risk-free interest rate 0.80% 0.50% 0.70% 0.30%
Dividend yield 2.20% 1.70% 1.90% 1.20%
Weighted-average estimated fair value $ 31.24 $ 33.41 $ 30.99 $ 32.20
Performance-based Restricted Stock Units (Market-Based PRSUs) [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Expected stock price volatility     32.20% 34.70%
Expected SOX stock price volatility     24.30% 27.10%
Risk-free interest rate     0.90% 0.30%
Dividend yield     1.90% 1.20%
Weighted-average estimated fair value     $ 31.18 $ 33.03