Consolidated Statements Of Stockholders' Equity - USD ($) shares in Thousands, $ in Thousands	Total	Cumulative Effect, Period Of Adoption, Adjustment	Total  Synopsys Stockholders’ Equity	Total  Synopsys Stockholders’ Equity Cumulative Effect, Period Of Adoption, Adjustment	Common Stock	Capital in Excess of Par Value	Retained Earnings	Retained Earnings Cumulative Effect, Period Of Adoption, Adjustment	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Non-controlling Interest
Beginning Balance (in shares) at Oct. 31, 2020					152,618
Beginning balance at Oct. 31, 2020	$ 4,912,367		$ 4,907,404		$ 1,528	$ 1,653,166	$ 3,795,397		$ (488,613)	$ (54,074)	$ 4,963
Beginning balance (Adjustment Due To Adoption Of Accounting Standards Related To Credit Losses) at Oct. 31, 2020		$ (3,200)		$ (3,200)				$ (3,200)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	756,359		757,516				757,516				(1,157)
Other comprehensive income (loss), net of tax effects	$ 4,470		4,470							4,470
Purchases of treasury stock (in shares)	(2,780)				(2,780)
Purchases of treasury stock	$ (753,081)		(753,081)		$ (28)	28			(753,081)
Equity forward contract, net	$ (35,000)		(35,000)			(35,000)
Common stock issued, net of shares withheld for employee taxes (in shares)	3,224				3,224
Common stock issued, net of shares withheld for employee taxes	$ 71,756		71,756		$ 31	(387,103)			458,828
Stock-based compensation	345,272		345,272			345,272
Ending Balance (in shares) at Oct. 31, 2021					153,062
Ending balance at Oct. 31, 2021	5,298,943		5,295,137		$ 1,531	1,576,363	4,549,713		(782,866)	(49,604)	3,806
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	983,288		984,594				984,594				(1,306)
Other comprehensive income (loss), net of tax effects	$ (184,673)		(184,673)							(184,673)
Purchases of treasury stock (in shares)	(3,609)				(3,609)
Purchases of treasury stock	$ (1,135,000)		(1,135,000)		$ (36)	36			(1,135,000)
Equity forward contract, net	$ 35,000		35,000			35,000
Common stock issued, net of shares withheld for employee taxes (in shares)	2,922				2,922
Common stock issued, net of shares withheld for employee taxes	$ 63,939		63,939		$ 29	(581,001)			644,911
Stock-based compensation	$ 459,029		456,728			456,728					2,301
Ending Balance (in shares) at Oct. 31, 2022	152,375				152,375
Ending balance at Oct. 31, 2022	$ 5,520,526		5,515,725		$ 1,524	1,487,126	5,534,307		(1,272,955)	(234,277)	4,801
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	1,228,127		1,229,888				1,229,888				(1,761)
Other comprehensive income (loss), net of tax effects	$ 37,863		37,863							37,863
Purchases of treasury stock (in shares)	(2,992)				(2,992)
Purchases of treasury stock	$ (1,160,724)		(1,160,724)		$ (30)	30			(1,160,724)
Equity forward contract, net	$ (45,000)		(45,000)			(45,000)
Common stock issued, net of shares withheld for employee taxes (in shares)	2,670				2,670
Common stock issued, net of shares withheld for employee taxes	$ 13,737		13,737		$ 27	(725,211)	(19,108)		758,029
Stock-based compensation	563,292		558,078			558,078					5,214
Adjustments to redeemable non-controlling interest	(3,388)		(3,388)				(3,388)
Recognition of non-controlling interest upon issuance of subsidiary stock	$ (1,175)		1,129			1,129					(2,304)
Ending Balance (in shares) at Oct. 31, 2023	152,053				152,053
Ending 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