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Stock-Based Compensation (Narrative) (Details) - metric
3 Months Ended
Feb. 29, 2020
Feb. 28, 2019
Feb. 28, 2018
Restricted Stock Units      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of performance metrics 2 2 2
Stock-based compensation award service period (in years) 3 years 3 years 3 years
Percentage of shares based on market condition of total shareholder return 50.00% 50.00% 50.00%
Award market condition period 3 years 3 years 3 years
Percentage of shares based on cumulative performance condition 50.00% 50.00% 50.00%
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Stock-based compensation award service period (in years) 4 years