Unaudited Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands	Total		Common Stock	Capital in Excess of Par Value	Retained Earnings	Treasury Stock	Accumulated Other Comprehensive Income (Loss)	Total  Synopsys Stockholders’ Equity	Non-controlling Interest
Balance (in shares) at Oct. 31, 2021			153,062
Beginning balance at Oct. 31, 2021	$ 5,298,943		$ 1,531	$ 1,576,363	$ 4,549,713	$ (782,866)	$ (49,604)	$ 5,295,137	$ 3,806
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	607,781				608,468			608,468	(687)
Other comprehensive income (loss), net of tax effects	$ (63,495)						(63,495)	(63,495)
Purchases of treasury stock (in shares)	(1,685)		(1,685)
Purchases of treasury stock	$ (535,000)		$ (16)	16		(535,000)		(535,000)
Equity forward contract, net	$ 35,000			35,000				35,000
Common stock issued, net of shares withheld for employee taxes (in shares)	1,578		1,578
Common stock issued, net of shares withheld for employee taxes	$ 18,917		$ 15	(299,730)		318,632		18,917
Stock-based compensation	205,832			205,832				205,832
Adjustments to redeemable non-controlling interest	(548)				(548)			(548)
Balance (in shares) at Apr. 30, 2022			152,955
Ending balance at Apr. 30, 2022	5,567,430		$ 1,530	1,517,481	5,157,633	(999,234)	(113,099)	5,564,311	3,119
Balance (in shares) at Jan. 31, 2022			153,256
Beginning balance at Jan. 31, 2022	5,390,233		$ 1,533	1,430,226	4,863,400	(856,929)	(51,457)	5,386,773	3,460
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	294,440				294,781			294,781	(341)
Other comprehensive income (loss), net of tax effects	$ (61,642)						(61,642)	(61,642)
Purchases of treasury stock (in shares)	(984)	[1]	(984)
Purchases of treasury stock	$ (290,000)	[1]	$ (9)	9		(290,000)		(290,000)
Equity forward contract, net	$ 40,000			40,000				40,000
Common stock issued, net of shares withheld for employee taxes (in shares)	683	[1]	683
Common stock issued, net of shares withheld for employee taxes	$ 84,886		$ 6	(62,815)		147,695		84,886
Stock-based compensation	110,061			110,061				110,061
Adjustments to redeemable non-controlling interest	(548)				(548)			(548)
Balance (in shares) at Apr. 30, 2022			152,955
Ending balance at Apr. 30, 2022	5,567,430		$ 1,530	1,517,481	5,157,633	(999,234)	(113,099)	5,564,311	3,119
Balance (in shares) at Oct. 31, 2022			152,375
Beginning balance at Oct. 31, 2022	5,520,526		$ 1,524	1,487,126	5,534,307	(1,272,955)	(234,277)	5,515,725	4,801
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	543,786				544,446			544,446	(660)
Other comprehensive income (loss), net of tax effects	$ 88,280						88,280	88,280
Purchases of treasury stock (in shares)	(1,631)	[2]	(1,631)
Purchases of treasury stock	$ (560,724)	[2]	$ (16)	16		(560,724)		(560,724)
Equity forward contract, net	$ (45,000)			(45,000)				(45,000)
Common stock issued, net of shares withheld for employee taxes (in shares)	1,507	[2]	1,507
Common stock issued, net of shares withheld for employee taxes	$ 16,356		$ 15	(388,278)	(312)	404,931		16,356
Stock-based compensation	277,485			275,079				275,079	2,406
Adjustments to redeemable non-controlling interest	(3,432)				(3,432)			(3,432)
Recognition of non-controlling interest upon issuance of subsidiary stock	(332)			1,129				1,129	(1,461)
Balance (in shares) at Apr. 30, 2023			152,251
Ending balance at Apr. 30, 2023	5,836,945		$ 1,523	1,330,072	6,075,009	(1,428,748)	(145,997)	5,831,859	5,086
Balance (in shares) at Jan. 31, 2023			152,380
Beginning balance at Jan. 31, 2023	5,642,702		$ 1,524	1,292,900	5,805,843	(1,321,180)	(142,333)	5,636,754	5,948
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	272,544				272,910			272,910	(366)
Other comprehensive income (loss), net of tax effects	$ (3,664)						(3,664)	(3,664)
Purchases of treasury stock (in shares)	(825)	[2],[3]	(825)
Purchases of treasury stock	$ (300,000)	[2],[3]	$ (8)	8		(300,000)		(300,000)
Common stock issued, net of shares withheld for employee taxes (in shares)	696	[2],[3]	696
Common stock issued, net of shares withheld for employee taxes	$ 85,869		$ 7	(106,258)	(312)	192,432		85,869
Stock-based compensation	143,258			142,293				142,293	965
Adjustments to redeemable non-controlling interest	(3,432)				(3,432)			(3,432)
Recognition of non-controlling interest upon issuance of subsidiary stock	(332)			1,129				1,129	(1,461)
Balance (in shares) at Apr. 30, 2023			152,251
Ending balance at Apr. 30, 2023	$ 5,836,945		$ 1,523	$ 1,330,072	$ 6,075,009	$ (1,428,748)	$ (145,997)	$ 5,831,859	$ 5,086

[1] Included the 161,215 shares and $40.0 million equity forward contract from the December 2021 ASR settled in February 2022.

[2] Excluded the 105,792 shares and $45.0 million equity forward contract from the February 2023 ASR settled in May 2023.

[3] Included the 107,020 shares and $45.0 million equity forward contract from the December 2022 ASR settled in February 2023.