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Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended
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Jan. 31, 2015 | Jan. 31, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Consolidated | $ 542,043 us-gaap_Revenues | $ 478,951 us-gaap_Revenues
United States |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Consolidated | 277,587 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 233,627 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US
Europe |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Consolidated | 71,883 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 66,654 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Japan |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Consolidated | 60,852 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP | 64,320 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP
Asia-Pacific And Other |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |
Consolidated | $ 131,721 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = snps_AsiaPacificAndOtherMember | $ 114,350 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = snps_AsiaPacificAndOtherMember

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- Definition Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 + Details
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- Details
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- Details
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- Details
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Period Type: |

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- Details
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Period Type: |

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- Details
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Period Type: |