v2.4.0.6

Estimated Future Amortization of Intangible Assets (Parenthetical) (Detail) | Oct. 31, 2012 Y
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Expected Amortization Expense [Line Items] |
Estimated completion period of IPR&D projects, years | 2

X
- Definition Estimated completion period of in process research and development projects. + References No definition available. + Details
Name: | snps_EstimatedCompletionPeriodOfInProcessResearchAndDevelopmentProjects
Namespace Prefix: | snps_
Data Type: | xbrli:positiveIntegerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | snps_ExpectedAmortizationExpenseLineItems
Namespace Prefix: | snps_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration