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Stock Repurchase Program - Additional Information (Details) - USD ($) $ in Millions	Apr. 30, 2025	Oct. 31, 2022
Stock Repurchase Program [Abstract]
Stock repurchase program authorized amount		$ 1,500.0
Remaining amount available for further repurchases	$ 194.3

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- Definition

Stock Repurchase Program

+ References

No definition available.

+ Details

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Namespace Prefix:	snps_
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- Definition

Amount authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 505
-SubTopic 30
-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

+ Details

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- Definition

Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

No definition available.

+ Details

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