<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.8.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>496</ContextCount>
  <ElementCount>561</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>145</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>0001000 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1001501 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1002000 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ConsolidatedStatementsOfOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003000 - Statement - Consolidated Statements of Comprehensive Loss</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ConsolidatedStatementsOfComprehensiveLoss</Role>
      <ShortName>Consolidated Statements of Comprehensive Loss</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1005000 - Statement - Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ConsolidatedStatementsOfStockholdersEquity</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1006000 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC.</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsInc</Role>
      <ShortName>NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC.</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CashCashEquivalentsAndShortTermInvestmentsCashCashEquivalentsAndShortTermInvestments</Role>
      <ShortName>CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - BUSINESS COMBINATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinations</Role>
      <ShortName>BUSINESS COMBINATIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - INTANGIBLE ASSETS AND GOODWILL</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwill</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - LONG-TERM DEBT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebt</Role>
      <ShortName>LONG-TERM DEBT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SupplementalConsolidatedFinancialStatementInformation</Role>
      <ShortName>SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - STOCKHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockholdersEquity</Role>
      <ShortName>STOCKHOLDERS' EQUITY</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - RESEARCH AND DEVELOPMENT, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ResearchAndDevelopmentNet</Role>
      <ShortName>RESEARCH AND DEVELOPMENT, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxes</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/FairValueMeasurements</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2114100 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/DerivativeFinancialInstruments</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2115100 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlans</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2119100 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2120100 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformation</Role>
      <ShortName>SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2122100 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SelectedQuarterlyFinancialInformationUnauditedSelectedQuarterlyFinancialInformationUnaudited</Role>
      <ShortName>SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED)</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2201201 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2301302 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2302301 - Disclosure - NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsIncTables</Role>
      <ShortName>NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsInc</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CashCashEquivalentsAndShortTermInvestmentsCashCashEquivalentsAndShortTermInvestmentsTables</Role>
      <ShortName>CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/CashCashEquivalentsAndShortTermInvestmentsCashCashEquivalentsAndShortTermInvestments</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - BUSINESS COMBINATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsTables</Role>
      <ShortName>BUSINESS COMBINATIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/BusinessCombinations</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - INTANGIBLE ASSETS AND GOODWILL (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwillTables</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/IntangibleAssetsAndGoodwill</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - LONG-TERM DEBT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtTables</Role>
      <ShortName>LONG-TERM DEBT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/LongTermDebt</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SupplementalConsolidatedFinancialStatementInformationTables</Role>
      <ShortName>SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/SupplementalConsolidatedFinancialStatementInformation</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2309301 - Disclosure - STOCKHOLDERS' EQUITY (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockholdersEquityTables</Role>
      <ShortName>STOCKHOLDERS' EQUITY (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/StockholdersEquity</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ResearchAndDevelopmentNetResearchAndDevelopmentNetTables</Role>
      <ShortName>RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - INCOME TAXES INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesTables</Role>
      <ShortName>INCOME TAXES INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>34</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2313301 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/FairValueMeasurementsTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/FairValueMeasurements</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2314301 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/DerivativeFinancialInstrumentsTables</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/DerivativeFinancialInstruments</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2315301 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansTables</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlans</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2319301 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <Position>38</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2320301 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformationTables</Role>
      <ShortName>SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformation</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2322301 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SelectedQuarterlyFinancialInformationUnauditedSelectedQuarterlyFinancialInformationUnauditedTables</Role>
      <ShortName>SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.verint.com/role/SelectedQuarterlyFinancialInformationUnauditedSelectedQuarterlyFinancialInformationUnaudited</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2401403 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - RECASTING OF PRIOR PERIODS SEGMENT INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesRecastingOfPriorPeriodsSegmentInformationDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - RECASTING OF PRIOR PERIODS SEGMENT INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>41</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2401404 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONSOLIDATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesConsolidationDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONSOLIDATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>42</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2401405 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - INVESTMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesInvestmentsDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - INVESTMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2401406 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - UNBILLED ACCOUNTS RECEIVABLE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesUnbilledAccountsReceivableDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - UNBILLED ACCOUNTS RECEIVABLE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>44</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2401407 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONCENTRATIONS OF CREDIT RISK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesConcentrationsOfCreditRiskDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - CONCENTRATIONS OF CREDIT RISK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>45</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2401408 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesAllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - ALLOWANCE FOR DOUBTFUL ACCOUNTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>46</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2401409 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - USEFUL LIVES; IMPAIRMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesUsefulLivesImpairmentsDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - USEFUL LIVES; IMPAIRMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>47</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2401410 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - SEGMENT REPORTING (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesSegmentReportingDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - SEGMENT REPORTING (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2401411 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - REVENUE RECOGNITION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesRevenueRecognitionDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - REVENUE RECOGNITION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>49</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2401412 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - COST OF REVENUE; CAPITALIZED SOFTWARE DEVELOPMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesCostOfRevenueCapitalizedSoftwareDevelopmentDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - COST OF REVENUE; CAPITALIZED SOFTWARE DEVELOPMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>50</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2401413 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - FOREIGN CURRENCY GAINS AND LOSSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesForeignCurrencyGainsAndLossesDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - FOREIGN CURRENCY GAINS AND LOSSES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>51</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2401414 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NET INCOME (LOSS) PER SHARE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesNetIncomeLossPerShareDetails</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - NET INCOME (LOSS) PER SHARE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2401415 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - IMPACT OF ASU NO. 2016-16 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesImpactOfAsuNo201616Details</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - IMPACT OF ASU NO. 2016-16 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>53</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2401416 - Disclosure - SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - IMPACT OF ASU NO. 2014-09 (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SummaryOfSignificantAccountingPoliciesSummaryOfSignificantAccountingPoliciesImpactOfAsuNo201409Details</Role>
      <ShortName>SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES - IMPACT OF ASU NO. 2014-09 (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2402402 - Disclosure - NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - CALCULATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsIncNetLossIncomePerCommonShareAttributableToVerintSystemsIncCalculationDetails</Role>
      <ShortName>NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - CALCULATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsIncTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2402403 - Disclosure - NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - ANTIDILUTIVE SECURITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsIncNetLossIncomePerCommonShareAttributableToVerintSystemsIncAntidilutiveSecuritiesDetails</Role>
      <ShortName>NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - ANTIDILUTIVE SECURITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsIncTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2402404 - Disclosure - NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - OTHER DETAILS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsIncNetLossIncomePerCommonShareAttributableToVerintSystemsIncOtherDetailsDetails</Role>
      <ShortName>NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. NET (LOSS) INCOME PER COMMON SHARE ATTRIBUTABLE TO VERINT SYSTEMS INC. - OTHER DETAILS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/NetLossIncomePerCommonShareAttributableToVerintSystemsIncTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CashCashEquivalentsAndShortTermInvestmentsCashCashEquivalentsAndShortTermInvestmentsDetails</Role>
      <ShortName>CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS CASH, CASH EQUIVALENTS, AND SHORT-TERM INVESTMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/CashCashEquivalentsAndShortTermInvestmentsCashCashEquivalentsAndShortTermInvestmentsTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2018 - SUMMARY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312018SummaryDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2018 - SUMMARY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>59</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2405403 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2018 - PURCHASE PRICE ALLOCATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312018PurchasePriceAllocationsDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2018 - PURCHASE PRICE ALLOCATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2405404 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2018 - INTANGIBLE ASSETS USEFUL LIVES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312018IntangibleAssetsUsefulLivesDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2018 - INTANGIBLE ASSETS USEFUL LIVES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2405405 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - CONTACT SOLUTIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312017ContactSolutionsDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - CONTACT SOLUTIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2405406 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - OPINIONLAB (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312017OpinionlabDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - OPINIONLAB (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>63</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2405407 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - PURCHASE PRICE ALLOCATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312017PurchasePriceAllocationsDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - PURCHASE PRICE ALLOCATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>64</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2405408 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - INTANGIBLE ASSETS USEFUL LIVES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312017IntangibleAssetsUsefulLivesDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2017 - INTANGIBLE ASSETS USEFUL LIVES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>65</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2405409 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2016 - SUMMARY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312016SummaryDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2016 - SUMMARY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2405410 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2016 - PURCHASE PRICE ALLOCATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312016PurchasePriceAllocationsDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2016 - PURCHASE PRICE ALLOCATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2405411 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2016 - INTANGIBLE ASSET USEFUL LIVES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsYearEndedJanuary312016IntangibleAssetUsefulLivesDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - YEAR ENDED JANUARY 31, 2016 - INTANGIBLE ASSET USEFUL LIVES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2405412 - Disclosure - BUSINESS COMBINATIONS BUSINESS COMBINATIONS - OTHER BUSINESS COMBINATION INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/BusinessCombinationsBusinessCombinationsOtherBusinessCombinationInformationDetails</Role>
      <ShortName>BUSINESS COMBINATIONS BUSINESS COMBINATIONS - OTHER BUSINESS COMBINATION INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>69</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - INTANGIBLE ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwillIntangibleAssetsDetails</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL - INTANGIBLE ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2406403 - Disclosure - INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - INTANGIBLE ASSETS BY REPORTABLE SEGMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwillIntangibleAssetsAndGoodwillIntangibleAssetsByReportableSegmentDetails</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - INTANGIBLE ASSETS BY REPORTABLE SEGMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2406404 - Disclosure - INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - AMORTIZATION AND IMPAIRMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwillIntangibleAssetsAndGoodwillAmortizationAndImpairmentDetails</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - AMORTIZATION AND IMPAIRMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2406405 - Disclosure - INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - FUTURE AMORTIZATION OF INTANGIBLE ASSETS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwillIntangibleAssetsAndGoodwillFutureAmortizationOfIntangibleAssetsDetails</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - FUTURE AMORTIZATION OF INTANGIBLE ASSETS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2406406 - Disclosure - INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - GOODWILL REALLOCATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwillIntangibleAssetsAndGoodwillGoodwillReallocationDetails</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL INTANGIBLE ASSETS AND GOODWILL - GOODWILL REALLOCATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2406407 - Disclosure - INTANGIBLE ASSETS AND GOODWILL - GOODWILL (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IntangibleAssetsAndGoodwillGoodwillDetails</Role>
      <ShortName>INTANGIBLE ASSETS AND GOODWILL - GOODWILL (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - LONG-TERM DEBT - SUMMARY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtSummaryDetails</Role>
      <ShortName>LONG-TERM DEBT - SUMMARY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2407403 - Disclosure - LONG-TERM DEBT - 1.50% CONVERTIBLE SENIOR NOTES (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.verint.com/role/LongTermDebt150ConvertibleSeniorNotesDetails</Role>
      <ShortName>LONG-TERM DEBT - 1.50% CONVERTIBLE SENIOR NOTES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2407404 - Disclosure - LONG-TERM DEBT - NOTE HEDGES AND WARRANTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtNoteHedgesAndWarrantsDetails</Role>
      <ShortName>LONG-TERM DEBT - NOTE HEDGES AND WARRANTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2407405 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - PRIOR CREDIT AGREEMENT - SUMMARY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebtPriorCreditAgreementSummaryDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - PRIOR CREDIT AGREEMENT - SUMMARY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2407406 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - PRIOR CREDIT AGREEMENT - INTEREST RATE DETAILS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebtPriorCreditAgreementInterestRateDetailsDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - PRIOR CREDIT AGREEMENT - INTEREST RATE DETAILS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2407407 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT - SUMMARY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebt2017CreditAgreementSummaryDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT - SUMMARY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2407408 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT - INTEREST RATE DETAILS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebt2017CreditAgreementInterestRateDetailsDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT - INTEREST RATE DETAILS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2407409 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - LOSS ON PARTIAL EARLY RETIREMENT OF 2017 TERM LOANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebtLossOnPartialEarlyRetirementOf2017TermLoansDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - LOSS ON PARTIAL EARLY RETIREMENT OF 2017 TERM LOANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2407410 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - INTEREST RATES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebtInterestRatesDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - INTEREST RATES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2407411 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - DEBT COVENANT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebtDebtCovenantDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - DEBT COVENANT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2407412 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - LOSS ON EARLY RETIREMENT OF 2014 TERM LOANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebtLossOnEarlyRetirementOf2014TermLoansDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - LOSS ON EARLY RETIREMENT OF 2014 TERM LOANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2407413 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT ISSUANCE COSTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebt2017CreditAgreementIssuanceCostsDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - 2017 CREDIT AGREEMENT ISSUANCE COSTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2407414 - Disclosure - LONG-TERM DEBT - FUTURE AMORTIZATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtFutureAmortizationDetails</Role>
      <ShortName>LONG-TERM DEBT - FUTURE AMORTIZATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2407415 - Disclosure - LONG-TERM DEBT LONG-TERM DEBT - INTEREST EXPENSE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/LongTermDebtLongTermDebtInterestExpenseDetails</Role>
      <ShortName>LONG-TERM DEBT LONG-TERM DEBT - INTEREST EXPENSE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SupplementalConsolidatedFinancialStatementInformationDetails</Role>
      <ShortName>SUPPLEMENTAL CONSOLIDATED FINANCIAL STATEMENT INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/SupplementalConsolidatedFinancialStatementInformationTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2409402 - Disclosure - STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - DIVIDENDS ON COMMON STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockholdersEquityStockholdersEquityDividendsOnCommonStockDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - DIVIDENDS ON COMMON STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2409403 - Disclosure - STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - SHARE REPURCHASE PROGRAM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockholdersEquityStockholdersEquityShareRepurchaseProgramDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - SHARE REPURCHASE PROGRAM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2409404 - Disclosure - STOCKHOLDERS' EQUITY - TREASURY STOCK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockholdersEquityTreasuryStockDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY - TREASURY STOCK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2409405 - Disclosure - STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - SCHEDULE OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockholdersEquityStockholdersEquityScheduleOfAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - SCHEDULE OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>2409406 - Disclosure - STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - AMOUNTS RECLASSIFIED OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockholdersEquityStockholdersEquityAmountsReclassifiedOutOfAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>STOCKHOLDERS' EQUITY STOCKHOLDERS' EQUITY - AMOUNTS RECLASSIFIED OUT OF ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET - R&amp;D EXPENSES AND GRANTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ResearchAndDevelopmentNetResearchAndDevelopmentNetRdExpensesAndGrantsDetails</Role>
      <ShortName>RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET - R&amp;D EXPENSES AND GRANTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET - CAPITALIZED SOFTWARE DEVELOPMENT COSTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/ResearchAndDevelopmentNetResearchAndDevelopmentNetCapitalizedSoftwareDevelopmentCostsDetails</Role>
      <ShortName>RESEARCH AND DEVELOPMENT, NET RESEARCH AND DEVELOPMENT, NET - CAPITALIZED SOFTWARE DEVELOPMENT COSTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - INCOME TAXES INCOME TAXES - IMPACT OF 2017 TAX ACT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesImpactOf2017TaxActDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - IMPACT OF 2017 TAX ACT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>98</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>2412403 - Disclosure - INCOME TAXES INCOME TAXES - INCOME (LOSS) BEFORE TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesIncomeLossBeforeTaxesDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - INCOME (LOSS) BEFORE TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>2412404 - Disclosure - INCOME TAXES INCOME TAXES - PROVISION FOR INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesProvisionForIncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - PROVISION FOR INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>2412405 - Disclosure - INCOME TAXES INCOME TAXES - EFFECTIVE TAX RATE RECONCILIATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesEffectiveTaxRateReconciliationDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - EFFECTIVE TAX RATE RECONCILIATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>2412406 - Disclosure - INCOME TAXES INCOME TAXES - U.S. TAX RATES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesUSTaxRatesDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - U.S. TAX RATES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>2412407 - Disclosure - INCOME TAXES INCOME TAXES - SPECIAL TAX RATES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesSpecialTaxRatesDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - SPECIAL TAX RATES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>2412408 - Disclosure - INCOME TAXES INCOME TAXES - DEFERRED INCOME TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesDeferredIncomeTaxesDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - DEFERRED INCOME TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>2412409 - Disclosure - INCOME TAXES INCOME TAXES - DEFERRED INCOME TAX INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesDeferredIncomeTaxInformationDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - DEFERRED INCOME TAX INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>2412410 - Disclosure - INCOME TAXES INCOME TAXES - CARRYFORWARDS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesCarryforwardsDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - CARRYFORWARDS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>106</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>2412411 - Disclosure - INCOME TAXES INCOME TAXES - FOREIGN WITHHOLDING TAXES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesForeignWithholdingTaxesDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - FOREIGN WITHHOLDING TAXES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>2412412 - Disclosure - INCOME TAXES INCOME TAXES - VALUATION ALLOWANCES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesValuationAllowancesDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - VALUATION ALLOWANCES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>2412413 - Disclosure - INCOME TAXES INCOME TAXES - UNRECOGNIZED TAX BENEFITS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - UNRECOGNIZED TAX BENEFITS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>2412414 - Disclosure - INCOME TAXES INCOME TAXES - UNRECOGNIZED TAX BENEFITS - INFORMATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/IncomeTaxesIncomeTaxesUnrecognizedTaxBenefitsInformationDetails</Role>
      <ShortName>INCOME TAXES INCOME TAXES - UNRECOGNIZED TAX BENEFITS - INFORMATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>110</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>2413402 - Disclosure - FAIR VALUE MEASUREMENTS - FAIR VALUE TABLE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/FairValueMeasurementsFairValueTableDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - FAIR VALUE TABLE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>111</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R112.htm</HtmlFileName>
      <LongName>2413403 - Disclosure - FAIR VALUE MEASUREMENTS - CONTINGENT CONSIDERATION TABLE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/FairValueMeasurementsContingentConsiderationTableDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - CONTINGENT CONSIDERATION TABLE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>112</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R113.htm</HtmlFileName>
      <LongName>2413404 - Disclosure - FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS - OPTION TO ACQUIRE NONCONTROLLING INTERESTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/FairValueMeasurementsFairValueMeasurementsOptionToAcquireNoncontrollingInterestsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS FAIR VALUE MEASUREMENTS - OPTION TO ACQUIRE NONCONTROLLING INTERESTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>113</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R114.htm</HtmlFileName>
      <LongName>2413405 - Disclosure - FAIR VALUE MEASUREMENTS - OTHER FAIR VALUE DISCLOSURES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/FairValueMeasurementsOtherFairValueDisclosuresDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - OTHER FAIR VALUE DISCLOSURES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>114</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R115.htm</HtmlFileName>
      <LongName>2414402 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS - ASSETS AND LIABILITIES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/DerivativeFinancialInstrumentsAssetsAndLiabilitiesDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS - ASSETS AND LIABILITIES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>115</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R116.htm</HtmlFileName>
      <LongName>2414403 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS - INTEREST RATE SWAP AGREEMENT (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/DerivativeFinancialInstrumentsDerivativeFinancialInstrumentsInterestRateSwapAgreementDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS DERIVATIVE FINANCIAL INSTRUMENTS - INTEREST RATE SWAP AGREEMENT (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>116</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R117.htm</HtmlFileName>
      <LongName>2414404 - Disclosure - DERIVATIVE FINANCIAL INSTRUMENTS - GAINS AND LOSSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/DerivativeFinancialInstrumentsGainsAndLossesDetails</Role>
      <ShortName>DERIVATIVE FINANCIAL INSTRUMENTS - GAINS AND LOSSES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>117</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R118.htm</HtmlFileName>
      <LongName>2415402 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - 2017 LONG-TERM STOCK INCENTIVE PLAN (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationAndOtherBenefitPlans2017LongTermStockIncentivePlanDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - 2017 LONG-TERM STOCK INCENTIVE PLAN (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>118</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R119.htm</HtmlFileName>
      <LongName>2415403 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK-BASED COMPENSATION - BY LINE ITEM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationAndOtherBenefitPlansStockBasedCompensationByLineItemDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK-BASED COMPENSATION - BY LINE ITEM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>119</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R120.htm</HtmlFileName>
      <LongName>2415404 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK-BASED COMPENSATION - BY CLASSIFICATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationByClassificationDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK-BASED COMPENSATION - BY CLASSIFICATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>120</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R121.htm</HtmlFileName>
      <LongName>2415405 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - RESTRICTED STOCK UNITS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationAndOtherBenefitPlansRestrictedStockUnitsDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - RESTRICTED STOCK UNITS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>121</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R122.htm</HtmlFileName>
      <LongName>2415406 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - PERFORMANCE RESTRICTED STOCK UNITS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationAndOtherBenefitPlansPerformanceRestrictedStockUnitsDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - PERFORMANCE RESTRICTED STOCK UNITS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>122</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R123.htm</HtmlFileName>
      <LongName>2415407 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK BONUS PROGRAM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationAndOtherBenefitPlansStockBonusProgramDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - STOCK BONUS PROGRAM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>123</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R124.htm</HtmlFileName>
      <LongName>2415408 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - BONUS SHARE PROGRAM (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationAndOtherBenefitPlansBonusShareProgramDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - BONUS SHARE PROGRAM (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>124</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R125.htm</HtmlFileName>
      <LongName>2415409 - Disclosure - STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - OTHER BENEFIT PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/StockBasedCompensationAndOtherBenefitPlansStockBasedCompensationAndOtherBenefitPlansOtherBenefitPlansDetails</Role>
      <ShortName>STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS STOCK-BASED COMPENSATION AND OTHER BENEFIT PLANS - OTHER BENEFIT PLANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>125</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R126.htm</HtmlFileName>
      <LongName>2419402 - Disclosure - COMMITMENTS AND CONTINGENCIES - RENT EXPENSE; PURCHASE OBLIGATIONS AND OFF-BALANCE SHEET RISK (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CommitmentsAndContingenciesRentExpensePurchaseObligationsAndOffBalanceSheetRiskDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - RENT EXPENSE; PURCHASE OBLIGATIONS AND OFF-BALANCE SHEET RISK (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>126</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R127.htm</HtmlFileName>
      <LongName>2419403 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - OPERATING AND CAPITAL LEASE COMMITMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesOperatingAndCapitalLeaseCommitmentsDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - OPERATING AND CAPITAL LEASE COMMITMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>127</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R128.htm</HtmlFileName>
      <LongName>2419404 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - WARRANTY OBLIGATIONS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesWarrantyObligationsDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - WARRANTY OBLIGATIONS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>128</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R129.htm</HtmlFileName>
      <LongName>2419405 - Disclosure - COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - LITIGATION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesLitigationDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES COMMITMENTS AND CONTINGENCIES - LITIGATION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/CommitmentsAndContingenciesCommitmentsAndContingenciesTables</ParentRole>
      <Position>129</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R130.htm</HtmlFileName>
      <LongName>2420402 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - REPORTABLE OPERATING SEGMENTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformationSegmentGeographicAndSignificantCustomerInformationReportableOperatingSegmentsDetails</Role>
      <ShortName>SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - REPORTABLE OPERATING SEGMENTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>130</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R131.htm</HtmlFileName>
      <LongName>2420403 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - SEGMENT REVENUE AND SEGMENT CONTRIBUTION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformationSegmentRevenueAndSegmentContributionDetails</Role>
      <ShortName>SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - SEGMENT REVENUE AND SEGMENT CONTRIBUTION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>131</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R132.htm</HtmlFileName>
      <LongName>2420404 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - RECONCILIATION OF SEGMENT CONTRIBUTION TO OPERATING INCOME (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformationSegmentGeographicAndSignificantCustomerInformationReconciliationOfSegmentContributionToOperatingIncomeDetails</Role>
      <ShortName>SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - RECONCILIATION OF SEGMENT CONTRIBUTION TO OPERATING INCOME (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>132</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R133.htm</HtmlFileName>
      <LongName>2420405 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - REVENUE AND LONG-LIVED ASSETS BY GEOGRAPHY (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformationSegmentGeographicAndSignificantCustomerInformationRevenueAndLongLivedAssetsByGeographyDetails</Role>
      <ShortName>SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - REVENUE AND LONG-LIVED ASSETS BY GEOGRAPHY (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>133</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R134.htm</HtmlFileName>
      <LongName>2420406 - Disclosure - SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - MAJOR CUSTOMERS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SegmentGeographicAndSignificantCustomerInformationSegmentGeographicAndSignificantCustomerInformationMajorCustomersDetails</Role>
      <ShortName>SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION SEGMENT, GEOGRAPHIC, AND SIGNIFICANT CUSTOMER INFORMATION - MAJOR CUSTOMERS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>134</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R135.htm</HtmlFileName>
      <LongName>2422402 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - QUARTERLY DATA (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SelectedQuarterlyFinancialInformationUnauditedSelectedQuarterlyFinancialInformationUnauditedQuarterlyDataDetails</Role>
      <ShortName>SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - QUARTERLY DATA (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/SelectedQuarterlyFinancialInformationUnauditedSelectedQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>135</Position>
    </Report>
    <Report instance="vrnt-20180131.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R136.htm</HtmlFileName>
      <LongName>2422403 - Disclosure - SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - UNUSUAL ITEMS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.verint.com/role/SelectedQuarterlyFinancialInformationUnauditedSelectedQuarterlyFinancialInformationUnauditedUnusualItemsDetails</Role>
      <ShortName>SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) SELECTED QUARTERLY FINANCIAL INFORMATION (UNAUDITED) - UNUSUAL ITEMS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.verint.com/role/SelectedQuarterlyFinancialInformationUnauditedSelectedQuarterlyFinancialInformationUnauditedTables</ParentRole>
      <Position>136</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>vrnt-20180131.xml</File>
    <File>vrnt-20180131.xsd</File>
    <File>vrnt-20180131_cal.xml</File>
    <File>vrnt-20180131_def.xml</File>
    <File>vrnt-20180131_lab.xml</File>
    <File>vrnt-20180131_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2014-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/invest/2013-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
