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Segment Disclosure - Revenues Related to Operations by Geographic Areas (Detail) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended
--- | --- | ---
Apr. 30, 2015 | Apr. 30, 2014 | Apr. 30, 2015 | Apr. 30, 2014
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Consolidated | $ 557,204 us-gaap_Revenues | $ 517,697 us-gaap_Revenues | $ 1,099,247 us-gaap_Revenues | $ 996,648 us-gaap_Revenues
United States |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Consolidated | 286,113 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 243,603 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 563,700 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US | 477,230 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_US
Europe |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Consolidated | 75,025 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 71,110 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 146,908 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember | 137,764 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = us-gaap_EuropeMember
Japan |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Consolidated | 53,242 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP | 58,382 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP | 114,094 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP | 122,702 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = country_JP
Asia-Pacific And Other |  |  |  |
Revenues from External Customers and Long-Lived Assets [Line Items] |  |  |  |
Consolidated | $ 142,824 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = snps_AsiaPacificAndOtherMember | $ 144,602 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = snps_AsiaPacificAndOtherMember | $ 274,545 us-gaap_Revenues / us-gaap_StatementGeographicalAxis = snps_AsiaPacificAndOtherMember | $ 258,952 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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