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Stock-Based Compensation (Fair Value Of Options And Employee Stock Purchase Plan) (Details)	12 Months Ended
	Nov. 30, 2012 Y	Nov. 30, 2011 Y	Nov. 30, 2010 Y
Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Expected volatility	30.00%	27.30%	27.20%
Risk-free interest rate	0.80%	1.70%	2.20%
Expected life (in years)	4.8	4.8	4.8
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	34.10%	25.80%	27.70%
Risk-free interest rate	0.20%	0.40%	0.60%
Expected life (in years)	1.5	1.6	1.5
Expected dividend yield	0.00%	0.00%	0.00%

The period of time an equity-based award is expected to be outstanding. An equity-based award's expected term is generally determined based on, among other factors, the instrument's contractual term and the effects of employees' expected exercise and post-vesting employment termination behavior.

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