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Summary Of Significant Accounting Policies (Policy)
12 Months Ended
Nov. 30, 2011
Summary Of Significant Accounting Policies [Abstract]  
Principles Of Consolidation
Fiscal Years

Fiscal Years

Our fiscal year is a twelve month period ending on November 30 of a stated year. For the purpose of presentation, we refer to the fiscal years ended November 30, 2011, 2010 and 2009, as our fiscal years 2011, 2010 and 2009, respectively.

Use Of Estimates
Revenue Recognition
Fair Value Of Financial Instruments
Concentration Of Credit Risk
Cash, Cash Equivalents, And Short-Term Investments
Property And Equipment, Net
Goodwill And In-Process Research And Development
Impairment Of Long-Lived Assets
Business Combinations
Acquisition Related And Other
Restructuring And Integration Costs
Stock-Based Compensation
Income Taxes
Foreign Currencies
Foreign Currency Forward Contracts
Capitalized Software Development Costs
Advertising Expense