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Cover - USD ($)
$ in Billions
 12 Months Ended
Oct. 31, 2023
Dec. 06, 2023
Apr. 30, 2023
Cover [Abstract]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Oct. 31, 2023    
Current Fiscal Year End Date --10-31    
Document Transition Report false    
Entity File Number 0-19807    
Entity Registrant Name SYNOPSYS, INC.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 56-1546236    
Entity Address, Address Line One 675 Almanor Avenue    
Entity Address, City or Town Sunnyvale    
Entity Address, State or Province CA    
Entity Address, Postal Zip Code 94085    
City Area Code 650    
Local Phone Number 584-5000    
Title of 12(b) Security Common Stock (par value of $0.01 per share)    
Trading Symbol SNPS    
Security Exchange Name NASDAQ    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
Entity Interactive Data Current Yes    
Entity Filer Category Large Accelerated Filer    
Entity Small Business false    
Entity Emerging Growth Company false    
ICFR Auditor Attestation Flag false    
Document Financial Statement Error Correction [Flag] false    
Entity Shell Company false    
Entity Public Float     $ 46.4
Entity Common Stock, Shares Outstanding   151,986,878  
Documents Incorporated by Reference
DOCUMENTS INCORPORATED BY REFERENCE
Portions of the registrant’s definitive Proxy Statement relating to the registrant’s 2024 Annual Meeting of Stockholders, scheduled to be held on April 10, 2024, are incorporated by reference into Part III of this Annual Report on Form 10-K where indicated. Except as expressly incorporated by reference, the registrant’s Proxy Statement shall not be deemed to be part of this report.
    
Amendment Flag false    
Document Fiscal Year Focus 2023    
Document Fiscal Period Focus FY    
Entity Central Index Key 0000883241