XML 88 R70.htm IDEA: XBRL DOCUMENT
v3.20.4

Contingencies - Additional Information (Detail) - USD ($) |  | 3 Months Ended | 12 Months Ended
--- | --- | --- | ---
Jun. 29, 2018 | Jul. 31, 2018 | Oct. 31, 2020
Loss Contingencies [Line Items] |  |  |
Payments for legal settlements | $ 65,000,000.0 |  |
Release of loss contingency accrual |  | $ 39,000,000.0 |
Litigation settlement, expense |  | $ 26,000,000.0 |
Patent cross-license |  |  | 7 years
Minimum |  |  |
Loss Contingencies [Line Items] |  |  |
Potential one-time termination charge |  |  | $ 0.0
Maximum |  |  |
Loss Contingencies [Line Items] |  |  |
Potential one-time termination charge |  |  | $ 25,000,000.0

X
- Definition Patent Cross-License between the company and Siemens and Mentor + References No definition available. + Details
Name: | snps_PatentCrossLicense
Namespace Prefix: | snps_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Potential One-Time Termination Charge + References No definition available. + Details
Name: | snps_PotentialOneTimeTerminationCharge
Namespace Prefix: | snps_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Release of loss contingency accrual due to legal settlement. + References No definition available. + Details
Name: | snps_ReleaseOfLossContingencyAccrual
Namespace Prefix: | snps_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of litigation expense, including but not limited to legal, forensic, accounting, and investigative fees. + References No definition available. + Details
Name: | us-gaap_LitigationSettlementExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of cash paid for the settlement of litigation or for other legal issues during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3536-108585 + Details
Name: | us-gaap_PaymentsForLegalSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |