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Unaudited Condensed Consolidated Statements of Stockholders' Equity Statement - USD ($) shares in Thousands, $ in Thousands | Total | Cumulative Effect, Period of Adoption, Adjustment [Member] | Common Stock | Capital in Excess of Par Value | Retained Earnings | Retained Earnings Cumulative Effect, Period of Adoption, Adjustment [Member] | Treasury Stock | Accumulated Other Comprehensive Income (Loss) | Total Synopsys Stockholders’ Equity | Non-controlling Interest
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Balance (in shares) at Oct. 31, 2019 |  |  |  | 150,331 |  |  |  |  |  |  |
Beginning balance at Oct. 31, 2019 | $ 4,088,876 |  |  | $ 1,503 | $ 1,635,455 | $ 3,164,144 |  | $ (625,642) | $ (92,447) | $ 4,083,013 | $ 5,863
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 466,421 |  |  |  |  | 466,892 |  |  |  | 466,892 | (471)
Other comprehensive income (loss), net of tax effects | $ 19,627 |  |  |  |  |  |  |  | 19,627 | 19,627 |
Purchases of treasury stock (in shares) | (1,380) | [1] |  | (1,380) |  |  |  |  |  |  |
Purchases of treasury stock | $ (200,000) | [1] |  | $ (12) | 12 |  |  | (200,000) |  | (200,000) |
Common stock issued, net of shares withheld for employee taxes (in shares) | 2,807 | [1] |  | 2,807 |  |  |  |  |  |  |
Common stock issued, net of shares withheld for employee taxes | $ 56,238 |  |  | $ 28 | (182,036) | (33,092) |  | 271,338 |  | 56,238 |
Stock-based compensation | 170,155 |  |  |  | 170,155 |  |  |  |  | 170,155 |
Balance (in shares) at Jul. 31, 2020 |  |  |  | 151,758 |  |  |  |  |  |  |
Ending balance at Jul. 31, 2020 | 4,601,317 |  |  | $ 1,519 | 1,623,586 | 3,597,944 |  | (554,304) | (72,820) | 4,595,925 | 5,392
Balance (in shares) at Apr. 30, 2020 |  |  |  | 150,908 |  |  |  |  |  |  |
Beginning balance at Apr. 30, 2020 | 4,280,949 |  |  | $ 1,509 | 1,655,787 | 3,356,489 |  | (634,669) | (104,030) | 4,275,086 | 5,863
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 252,440 |  |  |  |  | 252,911 |  |  |  | 252,911 | (471)
Other comprehensive income (loss), net of tax effects | $ 31,210 |  |  |  |  |  |  |  | 31,210 | 31,210 |
Purchases of treasury stock (in shares) | (149) | [1] |  | (149) |  |  |  |  |  |  |
Purchases of treasury stock | $ (20,000) | [1] |  |  |  |  |  | (20,000) |  | (20,000) |
Equity forward contract | $ 20,000 |  |  |  | 20,000 |  |  |  |  | 20,000 |
Common stock issued, net of shares withheld for employee taxes (in shares) | 999 | [1] |  | 999 |  |  |  |  |  |  |
Common stock issued, net of shares withheld for employee taxes | $ (25,119) |  |  | $ 10 | (114,038) | (11,456) |  | 100,365 |  | (25,119) |
Stock-based compensation | 61,837 |  |  |  | 61,837 |  |  |  |  | 61,837 |
Balance (in shares) at Jul. 31, 2020 |  |  |  | 151,758 |  |  |  |  |  |  |
Ending balance at Jul. 31, 2020 | 4,601,317 |  |  | $ 1,519 | 1,623,586 | 3,597,944 |  | (554,304) | (72,820) | 4,595,925 | 5,392
Balance (in shares) at Oct. 31, 2020 |  |  |  | 152,618 |  |  |  |  |  |  |
Beginning balance at Oct. 31, 2020 | 4,912,367 |  |  | $ 1,528 | 1,653,166 | 3,795,397 |  | (488,613) | (54,074) | 4,907,404 | 4,963
Beginning balance (Retained earnings adjustment due to adoption of ASC 326) at Oct. 31, 2020 |  |  | $ (3,200) |  |  |  | $ (3,200) |  |  |  |
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 555,222 |  |  |  |  | 556,069 |  |  |  | 556,069 | (847)
Other comprehensive income (loss), net of tax effects | $ 5,663 |  |  |  |  |  |  |  | 5,663 | 5,663 |
Purchases of treasury stock (in shares) | (2,114) |  |  | (2,114) |  |  |  |  |  |  |
Purchases of treasury stock | $ (538,082) |  |  | $ (21) | 21 |  |  | (538,082) |  | (538,082) |
Equity forward contract | $ (35,000) |  |  |  | (35,000) |  |  |  |  | (35,000) |
Common stock issued, net of shares withheld for employee taxes (in shares) | 2,093 |  |  | 2,093 |  |  |  |  |  |  |
Common stock issued, net of shares withheld for employee taxes | $ 9,636 |  |  | $ 19 | (259,737) |  |  | 269,354 |  | 9,636 |
Stock-based compensation | 248,530 |  |  |  | 248,530 |  |  |  |  | 248,530 |
Balance (in shares) at Jul. 31, 2021 |  |  |  | 152,597 |  |  |  |  |  |  |
Ending balance at Jul. 31, 2021 | 5,155,136 |  |  | $ 1,526 | 1,606,980 | 4,348,266 |  | (757,341) | (48,411) | 5,151,020 | 4,116
Balance (in shares) at Apr. 30, 2021 |  |  |  | 152,554 |  |  |  |  |  |  |
Beginning balance at Apr. 30, 2021 | 5,092,505 |  |  | $ 1,526 | 1,679,801 | 4,149,620 |  | (701,457) | (41,355) | 5,088,135 | 4,370
Increase (Decrease) in Stockholders' Equity [Roll Forward] |  |  |  |  |  |  |  |  |  |  |
Net income | 198,392 |  |  |  |  | 198,646 |  |  |  | 198,646 | (254)
Other comprehensive income (loss), net of tax effects | $ (7,056) |  |  |  |  |  |  |  | (7,056) | (7,056) |
Purchases of treasury stock (in shares) | (521) | [2] |  | (521) |  |  |  |  |  |  |
Purchases of treasury stock | $ (140,000) | [2] |  | $ (5) | 5 |  |  | (140,000) |  | (140,000) |
Equity forward contract | $ (35,000) |  |  |  | (35,000) |  |  |  |  | (35,000) |
Common stock issued, net of shares withheld for employee taxes (in shares) | 564 | [2] |  | 564 |  |  |  |  |  |  |
Common stock issued, net of shares withheld for employee taxes | $ (38,867) |  |  | $ 5 | (122,988) |  |  | 84,116 |  | (38,867) |
Stock-based compensation | 85,162 |  |  |  | 85,162 |  |  |  |  | 85,162 |
Balance (in shares) at Jul. 31, 2021 |  |  |  | 152,597 |  |  |  |  |  |  |
Ending balance at Jul. 31, 2021 | $ 5,155,136 |  |  | $ 1,526 | $ 1,606,980 | $ 4,348,266 |  | $ (757,341) | $ (48,411) | $ 5,151,020 | $ 4,116
[1] | The third quarter of fiscal 2020 includes the settlement of the 148,953 shares and $20.0 million equity forward contract from the February 2020 ASR settled in May 2020.
[2] | Do es not include the 99,573 shares and $35.0 million equity forward contract from the June 2021 ASR.

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