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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Apr. 30, 2026
Apr. 30, 2025
Apr. 30, 2026
Apr. 30, 2025
Statement of Comprehensive Income [Abstract]        
Net income $ 16,868 $ 345,110 $ 81,584 $ 642,521
Other comprehensive income (loss):        
Change in foreign currency translation adjustment (37,947) 44,764 586 16,127
Change in unrealized gains (losses) on available-for-sale securities, net of tax of $0 for periods presented (281) 52 (207) 9
Cash flow hedges:        
Deferred gains (losses), net of tax of $1,789 and $5,332 for the three and six months ended April 30, 2026, respectively, and of $10,507 and $22,002 for each of the same periods in fiscal 2025, respectively (5,763) (45,708) (17,299) (82,155)
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $(1,350) and $(2,003) for the three and six months ended April 30, 2026, respectively, and of $(783) and $(2,186) for each of the same periods in fiscal 2025, respectively 3,592 2,675 5,252 6,263
Other comprehensive income (loss), net of tax effects (40,399) 1,783 (11,668) (59,756)
Comprehensive income (loss) (23,531) 346,893 69,916 582,765
Less: Net income (loss) attributed to non-controlling interest and redeemable non-controlling interest (237) (222) (479) 1,506
Comprehensive income (loss) attributed to Synopsys $ (23,294) $ 347,115 $ 70,395 $ 581,259