XML 57 R45.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Financial Assets and Liabilities - Additional Information (Details) | 6 Months Ended
--- | ---
Apr. 30, 2018
Financial Assets and Liabilities [Line Items] |
Shipments period using hedges (in months) | 1 month
Period for hedge balance in OCI to be reclassified to statement of operations (in months) | 12 months
Non-Designated Hedging Instrument |
Financial Assets and Liabilities [Line Items] |
Forward contracts terms (in months) | 1 month
Foreign currency derivative contracts | Minimum |
Financial Assets and Liabilities [Line Items] |
Derivative maturity period | 1 month
Foreign currency derivative contracts | Maximum |
Financial Assets and Liabilities [Line Items] |
Derivative maturity period | 22 months
Foreign currency derivative contracts | Cash Flow Hedging | Maximum |
Financial Assets and Liabilities [Line Items] |
Derivative maturity period | 3 years
Foreign Exchange Forward | Cash Flow Hedging | Maximum |
Financial Assets and Liabilities [Line Items] |
Derivative maturity period | 22 months
Foreign Exchange Contracts | Maximum |
Financial Assets and Liabilities [Line Items] |
Duration of foreign exchange forward contracts | 1 year

X
- Definition Derivative, Maximum Shipment Period For Entry Into Foreign Currency Forward Contract + References No definition available. + Details
Name: | snps_DerivativeMaximumShipmentPeriodForEntryIntoForeignCurrencyForwardContract
Namespace Prefix: | snps_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Financial Assets and Liabilities [Line Items] + References No definition available. + Details
Name: | snps_FinancialAssetsAndLiabilitiesLineItems
Namespace Prefix: | snps_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Estimated period for the anticipated transfer of gain (loss), net, from accumulated other comprehensive income into earnings, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsGainLossReclassificationFromAccumulatedOCIToIncomeEstimateOfTimeToTransfer1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period remaining until the derivative contract matures, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeRemainingMaturity1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Period the derivative contract is outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_DerivativeTermOfContract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum period of time the entity is hedging its exposure to variability in future cash flows for forecasted transactions, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Excludes forecasted transactions related to payment of variable interest on existing financial instruments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=35736893&loc=d3e80748-113994 + Details
Name: | us-gaap_MaximumLengthOfTimeForeignCurrencyCashFlowHedge
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentsGainLossByHedgingRelationshipAxis=us-gaap_CashFlowHedgingMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeForwardMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_ForeignExchangeContractMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |