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Stock-Based Compensation (Fair Value of Options and Employee Stock Purchase Plan) (Details)
12 Months Ended
Nov. 30, 2019
Nov. 30, 2018
Nov. 30, 2017
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 25.00% 22.80% 25.00%
Risk-free interest rate 2.50% 2.30% 1.90%
Expected life (in years) 4 years 9 months 18 days 4 years 9 months 18 days 4 years 9 months 18 days
Expected dividend yield 1.80% 1.10% 1.70%
Employee Stock Purchase Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 30.60% 23.80% 22.90%
Risk-free interest rate 2.30% 2.30% 1.20%
Expected life (in years) 1 year 7 months 6 days 1 year 8 months 12 days 1 year 6 months
Expected dividend yield 1.70% 1.50% 1.60%
Long-Term Incentive Plan      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 32.20% 27.40% 27.50%
Risk-free interest rate 2.50% 2.10% 1.40%
Expected life (in years) 2 years 9 months 18 days 2 years 10 months 24 days 2 years 8 months 12 days
Expected dividend yield 1.70% 1.70% 1.80%