CONDENSED CONSOLIDATED STATEMENTS OF STOCKHOLDERS’ EQUITY - USD ($) shares in Thousands, $ in Thousands	Total	Total  Synopsys Stockholders’ Equity	Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning balance (in shares) at Oct. 31, 2023			152,053
Beginning balance at Oct. 31, 2023	$ 6,153,258	$ 6,147,308	$ 1,521	$ 1,276,152	$ 6,741,699	$ (1,675,650)	$ (196,414)	$ 5,950
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	448,468	449,112			449,112			(644)
Other comprehensive income (loss), net of tax effects	$ 33,190	33,190					33,190
Purchases of treasury stock (in shares)	(74)		(74)
Purchases of treasury stock	$ (45,000)	(45,000)	$ (1)	1		(45,000)
Equity forward contract, net	$ 45,000	45,000		45,000
Common stock issued, net of shares withheld for employee taxes (in shares)	557		557
Common stock issued, net of shares withheld for employee taxes	$ (137,201)	(137,201)	$ 5	(318,516)		181,310
Stock-based compensation	180,652	179,338		179,338				1,314
Adjustments to redeemable non-controlling interest	(2,261)	(2,261)			(2,261)
Deconsolidation and Recognition of non-controlling interest upon the sale and issuance of subsidiary stock	(532)	1,498		1,498				(2,030)
Ending balance (in shares) at Jan. 31, 2024			152,536
Ending balance at Jan. 31, 2024	$ 6,675,574	6,670,984	$ 1,525	1,183,473	7,188,550	(1,539,340)	(163,224)	4,590
Beginning balance (in shares) at Oct. 31, 2024	154,112		154,112
Beginning balance at Oct. 31, 2024	$ 8,993,206	8,990,702	$ 1,541	1,211,206	8,984,105	(1,025,770)	(180,380)	2,504
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	298,249	295,683			295,683			2,566
Other comprehensive income (loss), net of tax effects	$ (61,539)	(61,539)					(61,539)
Purchases of treasury stock (in shares)	0
Purchases of treasury stock	$ 0
Common stock issued, net of shares withheld for employee taxes (in shares)	506		506
Common stock issued, net of shares withheld for employee taxes	$ (110,604)	(110,604)	$ 6	(275,413)		164,803
Stock-based compensation	186,463	185,754		185,754				709
Adjustments to redeemable non-controlling interest	(838)	(838)			(838)
Deconsolidation and Recognition of non-controlling interest upon the sale and issuance of subsidiary stock	$ (36)	5,634		5,634				(5,670)
Ending balance (in shares) at Jan. 31, 2025	154,618		154,618
Ending balance at Jan. 31, 2025	$ 9,304,901	$ 9,304,792	$ 1,547	$ 1,127,181	$ 9,278,950	$ (860,967)	$ (241,919)	$ 109