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Stock-Based Compensation (Fair Value Of Options And Employee Stock Purchase Plan) (Details)
12 Months Ended
Nov. 30, 2013
Nov. 30, 2012
Nov. 30, 2011
Stock Options [Member]
     
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Expected volatility 31.90% 30.00% 27.30%
Risk-free interest rate 0.70% 0.80% 1.70%
Expected life 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 31.80% 34.10% 25.80%
Risk-free interest rate 0.20% 0.20% 0.40%
Expected life 1 year 6 months 1 year 6 months 1 year 7 months 6 days
Expected dividend yield 0.00% 0.00% 0.00%