v3.26.1
ACQUISITIONS OF SPIRENT, OSG and PowerArtist (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Oct. 17, 2025
Oct. 16, 2025
Oct. 15, 2025
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2026
Apr. 30, 2025
Business Combination [Line Items]              
Payments to Acquire Businesses, Net of Cash Acquired           $ 17 $ 3
Goodwill, Acquired During Period           30  
Share-based Compensation Expense       $ 58 $ 37 135 $ 99
Disposal Group, Including Discontinued Operation, Goodwill     $ 56        
Disposal Group, Including Discontinued Operation, Intangible Assets     346        
Disposal Group, Including Discontinued Operation, Inventory     25        
Disposal Group, Including Discontinued Operation, Other Assets     6        
Proceeds from Divestiture of Businesses   $ 399          
Goodwill, Other Increase (Decrease)           30  
Developed technology              
Business Combination [Line Items]              
Disposal Group, Including Discontinued Operation, Intangible Assets     295        
Customer relationships              
Business Combination [Line Items]              
Disposal Group, Including Discontinued Operation, Intangible Assets     $ 50        
Spirent              
Business Combination [Line Items]              
Business Combination, Effective Date of Acquisition     Oct. 15, 2025        
Payments to Acquire Businesses, Net of Cash Acquired     $ 1,415        
PreCombination FV of replacement share-based awards issued     14        
Cash Acquired from Acquisition     127        
Conversion Gains and Losses on Foreign Investments     8        
Business Combination, Consideration Transferred     1,564        
Goodwill, Acquired During Period     713        
Business Combination, Integration-Related Cost, Expense       30   49  
Business Combination, Recognized Liability Assumed, Deferred Tax Liability     168        
Business Combination, Recognized Liability Assumed, Other Liability, Noncurrent     181        
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill     528        
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment     24 4   4  
Business Combination, Recognized Asset Acquired, Inventory, Current     36 4   4  
Employee compensation and benefits assumed     44 4   4  
Goodwill, Other Increase (Decrease)           15  
Business Combination, Recognized Asset Acquired, Asset, Current       2   2  
Business Combination, Recognized Asset Acquired, Receivable, Current     71        
Business Combination, Recognized Liability Assumed, Deferred Revenue, Current     44        
Spirent | Communications Solutions Group              
Business Combination [Line Items]              
Goodwill, Acquired During Period     667        
Spirent | Electronic Industrial Solutions Group              
Business Combination [Line Items]              
Goodwill, Acquired During Period     46        
Spirent | Developed technology              
Business Combination [Line Items]              
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived     370        
Spirent | Customer relationships              
Business Combination [Line Items]              
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived     $ 145        
Synopsys Optical solutions group              
Business Combination [Line Items]              
Business Combination, Effective Date of Acquisition Oct. 17, 2025            
Payments to Acquire Businesses, Net of Cash Acquired $ 581         580  
Cash Acquired from Acquisition 3            
Goodwill, Acquired During Period 297            
Payments to Acquire in Process Research and Development 2            
Business Combination, Integration-Related Cost, Expense       0   5  
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill 276            
Business Combination, Recognized Asset Acquired, Property, Plant, and Equipment 1            
Business Combination, Recognized Asset Acquired, Receivable, Current 15            
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived 271            
Business Combination, Recognized Liability Assumed, Deferred Revenue, Current 9            
Business Combination, Provisional Information, Initial Accounting Incomplete, Adjustment, Consideration Transferred           1  
Synopsys Optical solutions group | Communications Solutions Group              
Business Combination [Line Items]              
Goodwill, Acquired During Period 67            
Synopsys Optical solutions group | Electronic Industrial Solutions Group              
Business Combination [Line Items]              
Goodwill, Acquired During Period 230            
Synopsys Optical solutions group | Developed technology              
Business Combination [Line Items]              
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived 183            
Synopsys Optical solutions group | Customer relationships              
Business Combination [Line Items]              
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived $ 86            
Ansys’ PowerArtist              
Business Combination [Line Items]              
Business Combination, Effective Date of Acquisition Oct. 17, 2025            
Business Combination, Consideration Transferred $ 26            
Goodwill, Acquired During Period 14            
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Excluding Goodwill $ 14            
Goodwill, Other Increase (Decrease)           12  
Business Combination, Recognized Asset Acquired, Receivable, Current       6   6  
Business Combination, Recognized Asset Acquired, Identifiable Intangible Asset, Finite-Lived       3   3  
Business Combination, Recognized Liability Assumed, Deferred Revenue, Current       $ 3   $ 3