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CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($)
$ in Thousands
 3 Months Ended 9 Months Ended
Jul. 31, 2026
Jul. 31, 2025
Jul. 31, 2026
Jul. 31, 2025
Statement of Comprehensive Income [Abstract]        
Net income $ 545,706 $ 242,277 $ 627,290 $ 884,798
Other comprehensive income (loss):        
Change in foreign currency translation adjustment (69,702) 2,747 (69,116) 18,874
Change in unrealized gains (losses) on available-for-sale securities, net of tax of $0 for periods presented 59 (387) (148) (378)
Cash flow hedges:        
Deferred gains (losses), net of tax of $(577) and $4,755 for the three and nine months ended July 31, 2026, respectively, and of $(1,666) and $20,336 for each of the same periods in fiscal 2025, respectively 1,924 5,598 (15,375) (76,558)
Reclassification adjustment on deferred (gains) losses included in net income, net of tax of $(679) and $(2,682) for the three and nine months ended July 31, 2026, respectively, and of $(18) and $(2,204) for each of the same periods in fiscal 2025, respectively 1,297 283 6,549 6,547
Other comprehensive income (loss), net of tax effects (66,422) 8,241 (78,090) (51,515)
Comprehensive income 479,284 250,518 549,200 833,283
Less: Net income (loss) attributed to non-controlling interest and redeemable non-controlling interest (94) (232) (573) 1,274
Comprehensive income attributed to Synopsys $ 479,378 $ 250,750 $ 549,773 $ 832,009