<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.6.0.2</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>374</ContextCount>
  <ElementCount>522</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>121</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>10</UnitCount>
  <MyReports>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00090 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DocumentDocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00100 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/StatementConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00105 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/StatementConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00200 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/StatementConsolidatedStatementsOfOperations</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00300 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00305 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/StatementConsolidatedStatementsOfComprehensiveIncomeLossParenthetical</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00400 - Statement - CONSOLIDATED STATEMENTS OF RETAINED EARNINGS, ACCUMULATED OTHER COMPREHENSIVE LOSS AND CHANGES IN CAPITAL ACCOUNTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/StatementConsolidatedStatementsOfRetainedEarningsAccumulatedOtherComprehensiveLossAndChangesInCapitalAccounts</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF RETAINED EARNINGS, ACCUMULATED OTHER COMPREHENSIVE LOSS AND CHANGES IN CAPITAL ACCOUNTS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>00500 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/StatementConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>10101 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPolicies</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>10201 - Disclosure - ACQUISITIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAcquisitions</Role>
      <ShortName>ACQUISITIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>10301 - Disclosure - DISCONTINUED OPERATIONS AND DISPOSALS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDiscontinuedOperationsAndDisposals</Role>
      <ShortName>DISCONTINUED OPERATIONS AND DISPOSALS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>10401 - Disclosure - INVENTORIES, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureInventoriesNet</Role>
      <ShortName>INVENTORIES, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>10501 - Disclosure - PROPERTY AND EQUIPMENT, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosurePropertyAndEquipmentNet</Role>
      <ShortName>PROPERTY AND EQUIPMENT, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>10601 - Disclosure - GOODWILL AND INTANGIBLES, NET</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureGoodwillAndIntangiblesNet</Role>
      <ShortName>GOODWILL AND INTANGIBLES, NET</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>10701 - Disclosure - ACCRUED EXPENSES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAccruedExpenses</Role>
      <ShortName>ACCRUED EXPENSES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>10801 - Disclosure - INCOME TAXES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureIncomeTaxes</Role>
      <ShortName>INCOME TAXES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>10901 - Disclosure - COMMITMENTS AND CONTINGENCIES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureCommitmentsAndContingencies</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>11001 - Disclosure - DEBT AND LINES OF CREDIT</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCredit</Role>
      <ShortName>DEBT AND LINES OF CREDIT</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>11101 - Disclosure - FAIR VALUE MEASUREMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureFairValueMeasurements</Role>
      <ShortName>FAIR VALUE MEASUREMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>11201 - Disclosure - DERIVATIVE INSTRUMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDerivativeInstruments</Role>
      <ShortName>DERIVATIVE INSTRUMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>11301 - Disclosure - STREAMLINING INITIATIVES</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureStreamliningInitiatives</Role>
      <ShortName>STREAMLINING INITIATIVES</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>11401 - Disclosure - SHARE-BASED COMPENSATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensation</Role>
      <ShortName>SHARE-BASED COMPENSATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>11501 - Disclosure - PROFIT-SHARING RETIREMENT, SAVINGS AND DEFERRED COMPENSATION PLANS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureProfitSharingRetirementSavingsAndDeferredCompensationPlans</Role>
      <ShortName>PROFIT-SHARING RETIREMENT, SAVINGS AND DEFERRED COMPENSATION PLANS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>11601 - Disclosure - EARNINGS PER COMMON SHARE</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureEarningsPerCommonShare</Role>
      <ShortName>EARNINGS PER COMMON SHARE</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>11701 - Disclosure - ADDITIONAL FINANCIAL INFORMATION</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAdditionalFinancialInformation</Role>
      <ShortName>ADDITIONAL FINANCIAL INFORMATION</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>11801 - Disclosure - SEGMENT REPORTING</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureSegmentReporting</Role>
      <ShortName>SEGMENT REPORTING</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>11901 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAccumulatedOtherComprehensiveLoss</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>12001 - Disclosure - RELATED PARTY TRANSACTIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureRelatedPartyTransactions</Role>
      <ShortName>RELATED PARTY TRANSACTIONS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>28</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>12101 - Disclosure - RECENT ACCOUNTING PRONOUNCEMENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureRecentAccountingPronouncements</Role>
      <ShortName>RECENT ACCOUNTING PRONOUNCEMENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>29</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>12201 - Disclosure - UNAUDITED QUARTERLY RESULTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureUnauditedQuarterlyResults</Role>
      <ShortName>UNAUDITED QUARTERLY RESULTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>30</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>12301 - Disclosure - SUBSEQUENT EVENTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureSubsequentEvents</Role>
      <ShortName>SUBSEQUENT EVENTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>31</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>12401 - Disclosure - SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureScheduleIiValuationAndQualifyingAccounts</Role>
      <ShortName>SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>32</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>20102 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesPolicies</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <Position>33</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>30203 - Disclosure - ACQUISITION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAcquisitionTables</Role>
      <ShortName>ACQUISITION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureAcquisitions</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>30303 - Disclosure - DISCONTINUED OPERATIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDiscontinuedOperationsTables</Role>
      <ShortName>DISCONTINUED OPERATIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureDiscontinuedOperationsAndDisposals</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>30403 - Disclosure - INVENTORIES, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureInventoriesNetTables</Role>
      <ShortName>INVENTORIES, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureInventoriesNet</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>30503 - Disclosure - PROPERTY AND EQUIPMENT, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosurePropertyAndEquipmentNetTables</Role>
      <ShortName>PROPERTY AND EQUIPMENT, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosurePropertyAndEquipmentNet</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>30603 - Disclosure - GOODWILL AND INTANGIBLES, NET (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureGoodwillAndIntangiblesNetTables</Role>
      <ShortName>GOODWILL AND INTANGIBLES, NET (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureGoodwillAndIntangiblesNet</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>30703 - Disclosure - ACCRUED EXPENSES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAccruedExpensesTables</Role>
      <ShortName>ACCRUED EXPENSES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureAccruedExpenses</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>30803 - Disclosure - INCOME TAXES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureIncomeTaxesTables</Role>
      <ShortName>INCOME TAXES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureIncomeTaxes</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>30903 - Disclosure - COMMITMENTS AND CONTINGENCIES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureCommitmentsAndContingenciesTables</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureCommitmentsAndContingencies</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>31003 - Disclosure - DEBT AND LINES OF CREDIT (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCreditTables</Role>
      <ShortName>DEBT AND LINES OF CREDIT (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCredit</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>31103 - Disclosure - FAIR VALUE MEASUREMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureFairValueMeasurementsTables</Role>
      <ShortName>FAIR VALUE MEASUREMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureFairValueMeasurements</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>31203 - Disclosure - DERIVATIVE INSTRUMENTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDerivativeInstrumentsTables</Role>
      <ShortName>DERIVATIVE INSTRUMENTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureDerivativeInstruments</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>31303 - Disclosure - STREAMLINING INITIATIVES (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureStreamliningInitiativesTables</Role>
      <ShortName>STREAMLINING INITIATIVES (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureStreamliningInitiatives</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>31403 - Disclosure - SHARE-BASED COMPENSATION (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationTables</Role>
      <ShortName>SHARE-BASED COMPENSATION (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensation</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>31603 - Disclosure - EARNINGS PER COMMON SHARE (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureEarningsPerCommonShareTables</Role>
      <ShortName>EARNINGS PER COMMON SHARE (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureEarningsPerCommonShare</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>31803 - Disclosure - SEGMENT REPORTING (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureSegmentReportingTables</Role>
      <ShortName>SEGMENT REPORTING (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureSegmentReporting</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>31903 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAccumulatedOtherComprehensiveLossTables</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureAccumulatedOtherComprehensiveLoss</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>32003 - Disclosure - RELATED PARTY TRANSACTIONS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureRelatedPartyTransactionsTables</Role>
      <ShortName>RELATED PARTY TRANSACTIONS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureRelatedPartyTransactions</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>32203 - Disclosure - UNAUDITED QUARTERLY RESULTS (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureUnauditedQuarterlyResultsTables</Role>
      <ShortName>UNAUDITED QUARTERLY RESULTS (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureUnauditedQuarterlyResults</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>40101 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesSegmentsDetails</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>40102 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesRevenueDetails</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Revenue (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>40103 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesIntangibleAssetsDetails</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>54</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>40104 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Goodwill (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesGoodwillDetails</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Goodwill (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>40105 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - PPE (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesPpeDetails</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - PPE (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>40106 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Operating Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesOperatingLeasesDetails</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Operating Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>57</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>40107 - Disclosure - BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Other (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesOtherDetails</Role>
      <ShortName>BASIS OF PRESENTATION AND SIGNIFICANT ACCOUNTING POLICIES - Other (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureBasisOfPresentationAndSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>40201 - Disclosure - ACQUISITION (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAcquisitionDetails</Role>
      <ShortName>ACQUISITION (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureAcquisitionTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>40202 - Disclosure - ACQUISITION - Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAcquisitionIntangibleAssetsDetails</Role>
      <ShortName>ACQUISITION - Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>60</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>40301 - Disclosure - DISCONTINUED OPERATIONS AND DISPOSALS - General (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDiscontinuedOperationsAndDisposalsGeneralDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS AND DISPOSALS - General (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>61</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>40302 - Disclosure - DISCONTINUED OPERATIONS AND DISPOSALS - Summarized results (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDiscontinuedOperationsAndDisposalsSummarizedResultsDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS AND DISPOSALS - Summarized results (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>62</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>40303 - Disclosure - DISCONTINUED OPERATIONS AND DISPOSALS - Other (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDiscontinuedOperationsAndDisposalsOtherDetails</Role>
      <ShortName>DISCONTINUED OPERATIONS AND DISPOSALS - Other (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureDiscontinuedOperationsAndDisposals</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>40401 - Disclosure - INVENTORIES, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureInventoriesNetDetails</Role>
      <ShortName>INVENTORIES, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureInventoriesNetTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>40501 - Disclosure - PROPERTY AND EQUIPMENT, NET (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosurePropertyAndEquipmentNetDetails</Role>
      <ShortName>PROPERTY AND EQUIPMENT, NET (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosurePropertyAndEquipmentNetTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>40601 - Disclosure - GOODWILL AND INTANGIBLES, NET - Carrying Value (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureGoodwillAndIntangiblesNetCarryingValueDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLES, NET - Carrying Value (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>66</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>40602 - Disclosure - GOODWILL AND INTANGIBLES, NET - Amortization Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureGoodwillAndIntangiblesNetAmortizationExpenseDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLES, NET - Amortization Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>67</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>40603 - Disclosure - GOODWILL AND INTANGIBLES, NET - Goodwill Rollforward (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureGoodwillAndIntangiblesNetGoodwillRollforwardDetails</Role>
      <ShortName>GOODWILL AND INTANGIBLES, NET - Goodwill Rollforward (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>68</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>40701 - Disclosure - ACCRUED EXPENSES (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAccruedExpensesDetails</Role>
      <ShortName>ACCRUED EXPENSES (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureAccruedExpensesTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>40801 - Disclosure - INCOME TAXES - Deferred &amp; Rate Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureIncomeTaxesDeferredRateReconciliationDetails</Role>
      <ShortName>INCOME TAXES - Deferred &amp; Rate Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>70</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>40802 - Disclosure - INCOME TAXES - NOL Carryforwards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureIncomeTaxesNolCarryforwardsDetails</Role>
      <ShortName>INCOME TAXES - NOL Carryforwards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>71</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>40803 - Disclosure - INCOME TAXES - Unrecognized Tax Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureIncomeTaxesUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>INCOME TAXES - Unrecognized Tax Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>72</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>40901 - Disclosure - COMMITMENTS AND CONTINGENCIES - Leases (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureCommitmentsAndContingenciesLeasesDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Leases (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>73</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>40902 - Disclosure - COMMITMENTS AND CONTINGENCIES - Sale Leaseback (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureCommitmentsAndContingenciesSaleLeasebackDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Sale Leaseback (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>74</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>40903 - Disclosure - COMMITMENTS AND CONTINGENCIES - Leases Assigned (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureCommitmentsAndContingenciesLeasesAssignedDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Leases Assigned (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>75</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>40904 - Disclosure - COMMITMENTS AND CONTINGENCIES - Other (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureCommitmentsAndContingenciesOtherDetails</Role>
      <ShortName>COMMITMENTS AND CONTINGENCIES - Other (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>76</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>41001 - Disclosure - DEBT AND LINES OF CREDIT - Summary (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCreditSummaryDetails</Role>
      <ShortName>DEBT AND LINES OF CREDIT - Summary (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>77</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>41002 - Disclosure - DEBT AND LINES OF CREDIT - Senior Notes (Details)</LongName>
      <ReportType>Notes</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCreditSeniorNotesDetails</Role>
      <ShortName>DEBT AND LINES OF CREDIT - Senior Notes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>78</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>41003 - Disclosure - DEBT AND LINES OF CREDIT - Term Loan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCreditTermLoanDetails</Role>
      <ShortName>DEBT AND LINES OF CREDIT - Term Loan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>79</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>41004 - Disclosure - DEBT AND LINES OF CREDIT - ABL Facility (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCreditAblFacilityDetails</Role>
      <ShortName>DEBT AND LINES OF CREDIT - ABL Facility (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>80</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>41005 - Disclosure - DEBT AND LINES OF CREDIT - ABL Facility Availability (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCreditAblFacilityAvailabilityDetails</Role>
      <ShortName>DEBT AND LINES OF CREDIT - ABL Facility Availability (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>81</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>41006 - Disclosure - DEBT AND LINES OF CREDIT - Capital Lease (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDebtAndLinesOfCreditCapitalLeaseDetails</Role>
      <ShortName>DEBT AND LINES OF CREDIT - Capital Lease (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>82</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>41101 - Disclosure - FAIR VALUE MEASUREMENTS - Financial assets and liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureFairValueMeasurementsFinancialAssetsAndLiabilitiesDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Financial assets and liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>83</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>41102 - Disclosure - FAIR VALUE MEASUREMENTS - Non-financial Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureFairValueMeasurementsNonFinancialAssetsDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - Non-financial Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>84</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>41103 - Disclosure - FAIR VALUE MEASUREMENTS - FV of debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureFairValueMeasurementsFvOfDebtDetails</Role>
      <ShortName>FAIR VALUE MEASUREMENTS - FV of debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>85</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>41201 - Disclosure - DERIVATIVE INSTRUMENTS - Type (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDerivativeInstrumentsTypeDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Type (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>86</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>41202 - Disclosure - DERIVATIVE INSTRUMENTS - Notional amount and FV (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDerivativeInstrumentsNotionalAmountAndFvDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Notional amount and FV (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>87</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>41203 - Disclosure - DERIVATIVE INSTRUMENTS - Gain Loss (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureDerivativeInstrumentsGainLossDetails</Role>
      <ShortName>DERIVATIVE INSTRUMENTS - Gain Loss (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>88</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>41301 - Disclosure - STREAMLINING INITIATIVES - By Type (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureStreamliningInitiativesByTypeDetails</Role>
      <ShortName>STREAMLINING INITIATIVES - By Type (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>89</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>41302 - Disclosure - STREAMLINING INITIATIVES - By Segment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureStreamliningInitiativesBySegmentDetails</Role>
      <ShortName>STREAMLINING INITIATIVES - By Segment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>90</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>41401 - Disclosure - SHARE-BASED COMPENSATION - Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationExpenseDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>91</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>41402 - Disclosure - SHARE-BASED COMPENSATION - Plans (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationPlansDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Plans (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>92</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>41403 - Disclosure - SHARE-BASED COMPENSATION - Options (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationOptionsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Options (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>93</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>41404 - Disclosure - SHARE-BASED COMPENSATION - Restricted Stock (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationRestrictedStockDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Restricted Stock (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>94</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>41405 - Disclosure - SHARE-BASED COMPENSATION - MSUs (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationMsusDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - MSUs (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>95</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>41406 - Disclosure - SHARE-BASED COMPENSATION - Performance Units (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationPerformanceUnitsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Performance Units (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>96</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>41407 - Disclosure - SHARE-BASED COMPENSATION - Restricted Stock Awards (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureShareBasedCompensationRestrictedStockAwardsDetails</Role>
      <ShortName>SHARE-BASED COMPENSATION - Restricted Stock Awards (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>97</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>41501 - Disclosure - PROFIT-SHARING RETIREMENT, SAVINGS AND DEFERRED COMPENSATION PLANS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureProfitSharingRetirementSavingsAndDeferredCompensationPlansDetails</Role>
      <ShortName>PROFIT-SHARING RETIREMENT, SAVINGS AND DEFERRED COMPENSATION PLANS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureProfitSharingRetirementSavingsAndDeferredCompensationPlans</ParentRole>
      <Position>98</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R99.htm</HtmlFileName>
      <LongName>41601 - Disclosure - EARNINGS PER COMMON SHARE - Basic and Diluted EPS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureEarningsPerCommonShareBasicAndDilutedEpsDetails</Role>
      <ShortName>EARNINGS PER COMMON SHARE - Basic and Diluted EPS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>99</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R100.htm</HtmlFileName>
      <LongName>41701 - Disclosure - ADDITIONAL FINANCIAL INFORMATION - Other Expense (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAdditionalFinancialInformationOtherExpenseDetails</Role>
      <ShortName>ADDITIONAL FINANCIAL INFORMATION - Other Expense (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>100</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R101.htm</HtmlFileName>
      <LongName>41702 - Disclosure - ADDITIONAL FINANCIAL INFORMATION - Cash flows disclosures (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAdditionalFinancialInformationCashFlowsDisclosuresDetails</Role>
      <ShortName>ADDITIONAL FINANCIAL INFORMATION - Cash flows disclosures (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>101</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R102.htm</HtmlFileName>
      <LongName>41801 - Disclosure - SEGMENT REPORTING - Sales and EBITDA (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureSegmentReportingSalesAndEbitdaDetails</Role>
      <ShortName>SEGMENT REPORTING - Sales and EBITDA (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>102</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R103.htm</HtmlFileName>
      <LongName>41802 - Disclosure - SEGMENT REPORTING - Reconciliation (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureSegmentReportingReconciliationDetails</Role>
      <ShortName>SEGMENT REPORTING - Reconciliation (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>103</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R104.htm</HtmlFileName>
      <LongName>41803 - Disclosure - SEGMENT REPORTING - Geographic Category (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureSegmentReportingGeographicCategoryDetails</Role>
      <ShortName>SEGMENT REPORTING - Geographic Category (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>104</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R105.htm</HtmlFileName>
      <LongName>41804 - Disclosure - SEGMENT REPORTING - Product Category (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureSegmentReportingProductCategoryDetails</Role>
      <ShortName>SEGMENT REPORTING - Product Category (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>105</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R106.htm</HtmlFileName>
      <LongName>41901 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAccumulatedOtherComprehensiveLossDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureAccumulatedOtherComprehensiveLossTables</ParentRole>
      <Position>106</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R107.htm</HtmlFileName>
      <LongName>41902 - Disclosure - ACCUMULATED OTHER COMPREHENSIVE LOSS - Change in components (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureAccumulatedOtherComprehensiveLossChangeInComponentsDetails</Role>
      <ShortName>ACCUMULATED OTHER COMPREHENSIVE LOSS - Change in components (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>107</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R108.htm</HtmlFileName>
      <LongName>42001 - Disclosure - RELATED PARTY TRANSACTIONS - Equity Method Investments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureRelatedPartyTransactionsEquityMethodInvestmentsDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Equity Method Investments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>108</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R109.htm</HtmlFileName>
      <LongName>42002 - Disclosure - RELATED PARTY TRANSACTIONS - Equity Method Investments BS and IS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureRelatedPartyTransactionsEquityMethodInvestmentsBsAndIsDetails</Role>
      <ShortName>RELATED PARTY TRANSACTIONS - Equity Method Investments BS and IS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <Position>109</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R110.htm</HtmlFileName>
      <LongName>42201 - Disclosure - UNAUDITED QUARTERLY RESULTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureUnauditedQuarterlyResultsDetails</Role>
      <ShortName>UNAUDITED QUARTERLY RESULTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureUnauditedQuarterlyResultsTables</ParentRole>
      <Position>110</Position>
    </Report>
    <Report instance="kate-20161231.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R111.htm</HtmlFileName>
      <LongName>42401 - Disclosure - SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.fifthandpacific.com/role/DisclosureScheduleIiValuationAndQualifyingAccountsDetails</Role>
      <ShortName>SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.fifthandpacific.com/role/DisclosureScheduleIiValuationAndQualifyingAccounts</ParentRole>
      <Position>111</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>kate-20161231.xml</File>
    <File>kate-20161231.xsd</File>
    <File>kate-20161231_cal.xml</File>
    <File>kate-20161231_def.xml</File>
    <File>kate-20161231_lab.xml</File>
    <File>kate-20161231_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies/>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
