Goodwill and Other Acquired Intangible Assets (Schedule Of Acquired Intangible Assets) (Details)	12 Months Ended
	Nov. 30, 2012
Developed technologies
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	4 years 3 months 12 days
Customer base
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	3 years 5 months 45 days
Patents/core technologies
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	2 years 9 months 55 days
Trademarks
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 1 month 0 days
Maintenance agreements
Finite-Lived Intangible Assets [Line Items]
Weighted Average Remaining Life	5 years 0 months 18 days
Minimum | Developed technologies
Finite-Lived Intangible Assets [Line Items]
Estimated Life	4 years
Minimum | Customer base
Finite-Lived Intangible Assets [Line Items]
Estimated Life	4 years
Minimum | Patents/core technologies
Finite-Lived Intangible Assets [Line Items]
Estimated Life	5 years
Minimum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Life	4 years
Minimum | Maintenance agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Life	4 years
Maximum | Developed technologies
Finite-Lived Intangible Assets [Line Items]
Estimated Life	9 years
Maximum | Customer base
Finite-Lived Intangible Assets [Line Items]
Estimated Life	9 years
Maximum | Patents/core technologies
Finite-Lived Intangible Assets [Line Items]
Estimated Life	7 years
Maximum | Trademarks
Finite-Lived Intangible Assets [Line Items]
Estimated Life	8 years
Maximum | Maintenance agreements
Finite-Lived Intangible Assets [Line Items]
Estimated Life	9 years