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Note 6 - Accounting for Share-based Compensation - Fair Value of Options Granted (Details) - $ / shares
3 Months Ended 6 Months Ended
Jun. 01, 2019
Jun. 02, 2018
Jun. 01, 2019
Jun. 02, 2018
Expected life (Year) 4 years 273 days 4 years 273 days 4 years 273 days 4 years 273 days
Weighted-average expected volatility 24.70% 23.56% 24.26% 23.30%
Weighted-average expected dividend yield 1.42% 1.21% 1.40% 1.14%
Weighted-average fair value of grants (in dollars per share) $ 9.49 $ 11.35 $ 9.80 $ 11.37
Minimum [Member]        
Expected volatility 24.39% 23.42% 24.25% 23.18%
Risk-free interest rate 2.17% 2.54% 2.17% 2.38%
Expected dividend yield range 1.26% 1.21% 1.26% 1.12%
Maximum [Member]        
Expected volatility 24.76% 23.58% 24.76% 23.58%
Risk-free interest rate 2.31% 2.90% 2.55% 2.90%
Expected dividend yield range 1.45% 1.24% 1.45% 1.24%