v2.4.0.6

Employee Benefit Plans (Equity Compensation Plans - Other Assumed Stock Plans through Acquisitions) (Narrative) (Details) (Other Assumed Stock Plans [Member]) In Millions, unless otherwise specified | Oct. 31, 2011
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Other Assumed Stock Plans [Member] |
Shares assumed through acquisitions | 2.8
Assumed shares remaining outstanding | 0.8

X
- Definition Share based compensation arrangement assumed stock plans remaining outstanding shares. + References No definition available. + Details
Name: | snps_ShareBasedCompensationArrangementAssumedStockPlansRemainingOutstandingShares
Namespace Prefix: | snps_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition Share based compensation arrangement shares assumed through acquisitions gross. + References No definition available. + Details
Name: | snps_ShareBasedCompensationArrangementSharesAssumedThroughAcquisitionsGross
Namespace Prefix: | snps_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant