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Shareholders' Equity (Assumptions Used in Black Scholes valuation for Options and SAR's) (Details) - $ / shares
12 Months Ended
Dec. 28, 2019
Dec. 29, 2018
Dec. 30, 2017
Options and SAR's      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Per Share Weighted Average Fair Value of Grants (in dollars per share) $ 20.84 $ 22.73 $ 23.31
Risk-Free Interest Rate 2.40% 2.90% 2.10%
Expected Life (Years) 7 years 7 years 7 years
Expected Volatility 25.00% 27.80% 28.60%
Expected Dividend Yield 1.50% 1.40% 1.30%
Performance Share Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Risk-Free Interest Rate 2.30% 2.70% 1.60%
Expected Life (Years) 3 years 3 years 3 years
Expected Volatility 25.00% 25.00% 24.00%
Expected Dividend Yield 1.50% 1.40% 1.30%