XML 82 R65.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Stock Repurchase Program - Additional Information (Detail) - USD ($) $ / shares in Units, shares in Thousands | 1 Months Ended | 3 Months Ended | 4 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
Oct. 31, 2018 | May 31, 2018 | Mar. 31, 2018 | Feb. 28, 2018 | Dec. 31, 2017 | Sep. 30, 2017 | Jan. 31, 2018 | Nov. 30, 2017 | Mar. 31, 2018 | Oct. 31, 2018 | Oct. 31, 2018 | Oct. 31, 2017 | Oct. 31, 2016 | Apr. 05, 2018
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program authorized amount | $ 500,000,000.0 |  |  |  |  |  |  |  |  | $ 500,000,000.0 | $ 500,000,000.0 |  |  | $ 500,000,000
Remaining amount available for further repurchases | 325,000,000 |  |  |  |  |  |  |  |  | $ 325,000,000 | $ 325,000,000 |  |  |
Purchases of treasury stock (in shares) |  |  |  |  |  |  |  |  |  |  | 4,688 | 5,413 | 8,506 |
Average purchase price (in USD per share) |  |  |  |  |  |  |  |  |  |  | $ 89.59 | $ 70.21 | $ 49.37 |
Accelerated Share Repurchase Program September 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program authorized amount |  |  |  |  |  | $ 100,000,000.0 |  |  |  |  |  |  |  |
Stock repurchase program, prepayment during period |  |  |  |  |  | 100,000,000 |  |  |  |  |  |  |  |
Accelerated share repurchase, initial share delivery, amount |  |  |  |  |  | $ 80,000,000 |  |  |  |  |  |  |  |
Stock repurchase program, prepayment during period, derivative settlement |  |  |  |  |  |  | $ 20,000,000 |  |  |  |  |  |  |
Purchases of treasury stock (in shares) |  |  |  |  |  |  |  | 1,200 |  |  |  |  |  |
Average purchase price (in USD per share) |  |  |  |  |  |  |  | $ 83.80 |  |  |  |  |  |
Accelerated Share Repurchase Program December 2017 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program authorized amount |  |  |  |  | $ 200,000,000.0 |  |  |  |  |  |  |  |  |
Stock repurchase program, prepayment during period |  |  |  |  | 200,000,000 |  |  |  |  |  |  |  |  |
Accelerated share repurchase, initial share delivery, amount |  |  |  |  | $ 160,000,000 |  |  |  |  |  |  |  |  |
Stock repurchase program, prepayment during period, derivative settlement |  |  | $ 20,000,000 | $ 20,000,000 |  |  |  |  |  |  |  |  |  |
Purchases of treasury stock (in shares) |  |  |  |  |  |  |  |  | 2,300 |  |  |  |  |
Average purchase price (in USD per share) |  |  |  |  |  |  |  |  | $ 87.08 |  |  |  |  |
Accelerated Share Repurchase Program May 2018 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program authorized amount |  | $ 165,000,000.0 |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, prepayment during period |  | 165,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Accelerated share repurchase, initial share delivery, amount |  | $ 132,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Stock repurchase program, prepayment during period, derivative settlement | $ 33,000,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Purchases of treasury stock (in shares) |  |  |  |  |  |  |  |  |  | 1,800 |  |  |  |
Average purchase price (in USD per share) |  |  |  |  |  |  |  |  |  | $ 92.42 |  |  |  |

X
- Definition Accelerated share repurchase initial share delivery amount. + References No definition available. + Details
Name: | snps_AcceleratedShareRepurchaseInitialShareDeliveryAmount
Namespace Prefix: | snps_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Stock Repurchase Program, Prepayment During Period + References No definition available. + Details
Name: | snps_StockRepurchaseProgramPrepaymentDuringPeriod
Namespace Prefix: | snps_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Stock Repurchase Program, Prepayment During Period, Derivative Settlement + References No definition available. + Details
Name: | snps_StockRepurchaseProgramPrepaymentDuringPeriodDerivativeSettlement
Namespace Prefix: | snps_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_EquityClassOfTreasuryStockLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramAuthorizedAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Amount remaining of a stock repurchase plan authorized. + References No definition available. + Details
Name: | us-gaap_StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
Name: | us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares that have been repurchased during the period and are being held in treasury. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=109259400&loc=d3e21463-112644 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.3-04) -URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(29)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
Name: | us-gaap_TreasuryStockSharesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=snps_AcceleratedShareRepurchaseProgramSeptember2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=snps_AcceleratedShareRepurchaseProgramDecember2017Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_ShareRepurchaseProgramAxis=snps_AcceleratedShareRepurchaseProgramMay2018Member
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |