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Stock-Based Compensation (Fair Value of Options and Employee Stock Purchase Plan) (Details)
12 Months Ended
Nov. 30, 2015
Nov. 30, 2014
Nov. 30, 2013
Stock Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 28.00% 28.40% 31.90%
Risk-free interest rate 1.30% 1.60% 0.70%
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 0.00% 0.00% 0.00%
Employee Stock Purchase Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 21.10% 25.10% 31.80%
Risk-free interest rate 0.50% 0.30% 0.20%
Expected life (in years) 1 year 7 months 6 days 1 year 7 months 6 days 1 year 6 months
Expected dividend yield 0.00% 0.00% 0.00%