Revised share reserve ratio

No definition available.

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- Details

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- Definition

Share reserve ratio.

+ References

No definition available.

+ Details

Name:	snps_ShareReserveRatio
Namespace Prefix:	snps_
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- Definition

Unrecognized cost of unvested share-based compensation awards.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (i)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

+ Details

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- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

+ Details

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Namespace Prefix:
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Period Type:

Employee Benefit Plans (Restricted Stock Units) - Additional Information (Detail) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended	0 Months Ended
	Oct. 31, 2014	Apr. 03, 2012	Mar. 24, 2011
Schedule Of Restricted Stock [Line Items]
Closing stock price	$ 40.98us-gaap_SaleOfStockPricePerShare
Unamortized share-based compensation expense	$ 139.4
Weighted-average period of total compensation costs to be recognized in years	2 years 6 months
Restricted Stock Units
Schedule Of Restricted Stock [Line Items]
Share reserve ratio		1.25	2.18
Revised share reserve ratio		1.50	1.25
Restricted Stock Units \| Minimum
Schedule Of Restricted Stock [Line Items]
Vesting period, (in years)	3 years
Restricted Stock Units \| Maximum
Schedule Of Restricted Stock [Line Items]
Vesting period, (in years)	4 years