<?xml version='1.0' encoding='UTF-8'?>
<FilingSummary>
  <Version>3.8.0.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>487</ContextCount>
  <ElementCount>526</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>false</FootnotesReported>
  <SegmentCount>144</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>8</UnitCount>
  <MyReports>
    <Report instance="logi-20180331.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.logitech.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>1001000 - Statement - CONSOLIDATED STATEMENTS OF OPERATIONS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ConsolidatedStatementsOfOperations</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF OPERATIONS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>1002000 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ConsolidatedStatementsOfComprehensiveIncomeLoss</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>1003000 - Statement - CONSOLIDATED BALANCE SHEETS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ConsolidatedBalanceSheets</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>1003501 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ConsolidatedBalanceSheetsParenthetical</Role>
      <ShortName>CONSOLIDATED BALANCE SHEETS (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>1004000 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOWS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ConsolidatedStatementsOfCashFlows</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CASH FLOWS</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>1005000 - Statement - CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ConsolidatedStatementsOfChangesInShareholdersEquity</Role>
      <ShortName>CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>2101100 - Disclosure - The Company</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/Company</Role>
      <ShortName>The Company</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>2102100 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>2103100 - Disclosure - Business Acquisitions</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BusinessAcquisitions</Role>
      <ShortName>Business Acquisitions</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>2104100 - Disclosure - Discontinued Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DiscontinuedOperations</Role>
      <ShortName>Discontinued Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>2105100 - Disclosure - Net Income (Loss) per Share</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/NetIncomeLossPerShare</Role>
      <ShortName>Net Income (Loss) per Share</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>2106100 - Disclosure - Employee Benefit Plans</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlans</Role>
      <ShortName>Employee Benefit Plans</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>2107100 - Disclosure - Other Income (Expense), net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/OtherIncomeExpenseNet</Role>
      <ShortName>Other Income (Expense), net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>2108100 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>2109100 - Disclosure - Balance Sheet Components</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BalanceSheetComponents</Role>
      <ShortName>Balance Sheet Components</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>2110100 - Disclosure - Fair Value Measurements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/FairValueMeasurements</Role>
      <ShortName>Fair Value Measurements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>2111100 - Disclosure - Derivative Financial Instruments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DerivativeFinancialInstruments</Role>
      <ShortName>Derivative Financial Instruments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>2112100 - Disclosure - Goodwill and Other Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssets</Role>
      <ShortName>Goodwill and Other Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>2113100 - Disclosure - Financing Arrangements</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/FinancingArrangements</Role>
      <ShortName>Financing Arrangements</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>2114100 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>2115100 - Disclosure - Shareholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ShareholdersEquity</Role>
      <ShortName>Shareholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>2116100 - Disclosure - Segment Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SegmentInformation</Role>
      <ShortName>Segment Information</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>2117100 - Disclosure - Restructuring</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/Restructuring</Role>
      <ShortName>Restructuring</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>2119100 - Disclosure - Schedule II - VALUATION AND QUALIFYING ACCOUNTS</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ScheduleIiValuationAndQualifyingAccounts</Role>
      <ShortName>Schedule II - VALUATION AND QUALIFYING ACCOUNTS</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>2202201 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://www.logitech.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>26</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>2303301 - Disclosure - Business Acquisitions (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BusinessAcquisitionsTables</Role>
      <ShortName>Business Acquisitions (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BusinessAcquisitions</ParentRole>
      <Position>27</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>2304301 - Disclosure - Discontinued Operations (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DiscontinuedOperationsTables</Role>
      <ShortName>Discontinued Operations (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DiscontinuedOperations</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>2305301 - Disclosure - Net Income (Loss) per Share (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/NetIncomeLossPerShareTables</Role>
      <ShortName>Net Income (Loss) per Share (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/NetIncomeLossPerShare</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>2306301 - Disclosure - Employee Benefit Plans (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansTables</Role>
      <ShortName>Employee Benefit Plans (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlans</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>2307301 - Disclosure - Other Income (Expense), net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/OtherIncomeExpenseNetTables</Role>
      <ShortName>Other Income (Expense), net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/OtherIncomeExpenseNet</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>2308301 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/IncomeTaxes</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>2309301 - Disclosure - Balance Sheet Components (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BalanceSheetComponentsTables</Role>
      <ShortName>Balance Sheet Components (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BalanceSheetComponents</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>2310301 - Disclosure - Fair Value Measurements (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/FairValueMeasurementsTables</Role>
      <ShortName>Fair Value Measurements (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/FairValueMeasurements</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>2311301 - Disclosure - Derivative Financial Instruments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DerivativeFinancialInstrumentsTables</Role>
      <ShortName>Derivative Financial Instruments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DerivativeFinancialInstruments</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>2312301 - Disclosure - Goodwill and Other Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Other Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssets</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>2314301 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>2315301 - Disclosure - Shareholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ShareholdersEquityTables</Role>
      <ShortName>Shareholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/ShareholdersEquity</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>2316301 - Disclosure - Segment Information (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SegmentInformationTables</Role>
      <ShortName>Segment Information (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/SegmentInformation</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>2317301 - Disclosure - Restructuring (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/RestructuringTables</Role>
      <ShortName>Restructuring (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://www.logitech.com/role/Restructuring</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>2402402 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/SummaryOfSignificantAccountingPoliciesPolicies</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>2403402 - Disclosure - Business Acquisitions  (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BusinessAcquisitionsNarrativeDetails</Role>
      <ShortName>Business Acquisitions  (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BusinessAcquisitionsTables</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>2403403 - Disclosure - Business Acquisitions  (Recognized Identifiable Assets Acquired and Liabilities Assumed) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BusinessAcquisitionsRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedDetails</Role>
      <ShortName>Business Acquisitions  (Recognized Identifiable Assets Acquired and Liabilities Assumed) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BusinessAcquisitionsTables</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>2403404 - Disclosure - Business Acquisitions  (Schedule of Consideration in Business Combinations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BusinessAcquisitionsScheduleOfConsiderationInBusinessCombinationsDetails</Role>
      <ShortName>Business Acquisitions  (Schedule of Consideration in Business Combinations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BusinessAcquisitionsTables</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>2403405 - Disclosure - Business Acquisitions  (Schedule of Intangible Assets Acquired) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BusinessAcquisitionsScheduleOfIntangibleAssetsAcquiredDetails</Role>
      <ShortName>Business Acquisitions  (Schedule of Intangible Assets Acquired) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BusinessAcquisitionsTables</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>2404402 - Disclosure - Discontinued Operations (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DiscontinuedOperationsNarrativeDetails</Role>
      <ShortName>Discontinued Operations (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DiscontinuedOperationsTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>2404403 - Disclosure - Discontinued Operations (Video Conference Segment) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DiscontinuedOperationsVideoConferenceSegmentDetails</Role>
      <ShortName>Discontinued Operations (Video Conference Segment) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DiscontinuedOperationsTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>2404404 - Disclosure - Discontinued Operations (Gain on Divestiture) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DiscontinuedOperationsGainOnDivestitureDetails</Role>
      <ShortName>Discontinued Operations (Gain on Divestiture) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DiscontinuedOperationsTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>2405402 - Disclosure - Net Income (Loss) per Share  (Computation of Basic and Diluted Net Income per Share) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/NetIncomeLossPerShareComputationOfBasicAndDilutedNetIncomePerShareDetails</Role>
      <ShortName>Net Income (Loss) per Share  (Computation of Basic and Diluted Net Income per Share) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/NetIncomeLossPerShareTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>2406402 - Disclosure - Employee Benefit Plans (Share-Based Compensation Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansShareBasedCompensationExpenseDetails</Role>
      <ShortName>Employee Benefit Plans (Share-Based Compensation Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>2406403 - Disclosure - Employee Benefit Plans (Additional Information For Share Based Compensation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansAdditionalInformationForShareBasedCompensationDetails</Role>
      <ShortName>Employee Benefit Plans (Additional Information For Share Based Compensation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>2406404 - Disclosure - Employee Benefit Plans (Unamortized Share-Based Compensation Expense) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansUnamortizedShareBasedCompensationExpenseDetails</Role>
      <ShortName>Employee Benefit Plans (Unamortized Share-Based Compensation Expense) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>2406405 - Disclosure - Employee Benefit Plans (Fair Value Assumptions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansFairValueAssumptionsDetails</Role>
      <ShortName>Employee Benefit Plans (Fair Value Assumptions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>2406406 - Disclosure - Employee Benefit Plans (Stock Option Activity) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansStockOptionActivityDetails</Role>
      <ShortName>Employee Benefit Plans (Stock Option Activity) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>2406407 - Disclosure - Employee Benefit Plans (RSU rollforward) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansRsuRollforwardDetails</Role>
      <ShortName>Employee Benefit Plans (RSU rollforward) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>2406408 - Disclosure - Employee Benefit Plans (Defined Contribution Plans Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansDefinedContributionPlansNarrativeDetails</Role>
      <ShortName>Employee Benefit Plans (Defined Contribution Plans Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>2406409 - Disclosure - Employee Benefit Plans (Net Periodic Benefit Cost, Defined Benefit Pension) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansNetPeriodicBenefitCostDefinedBenefitPensionDetails</Role>
      <ShortName>Employee Benefit Plans (Net Periodic Benefit Cost, Defined Benefit Pension) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>2406410 - Disclosure - Employee Benefit Plans (Projected Benefit Obligations) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansProjectedBenefitObligationsDetails</Role>
      <ShortName>Employee Benefit Plans (Projected Benefit Obligations) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>2406411 - Disclosure - Employee Benefit Plans (Defined Benefit Plans Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansDefinedBenefitPlansNarrativeDetails</Role>
      <ShortName>Employee Benefit Plans (Defined Benefit Plans Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>2406412 - Disclosure - Employee Benefit Plans (Fair Value of Plan Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansFairValueOfPlanAssetsDetails</Role>
      <ShortName>Employee Benefit Plans (Fair Value of Plan Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>2406413 - Disclosure - Employee Benefit Plans (Plan Asset Details) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansPlanAssetDetailsDetails</Role>
      <ShortName>Employee Benefit Plans (Plan Asset Details) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>2406414 - Disclosure - Employee Benefit Plans (Funded Status of Plan) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansFundedStatusOfPlanDetails</Role>
      <ShortName>Employee Benefit Plans (Funded Status of Plan) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>2406415 - Disclosure - Employee Benefit Plans (Amounts Recognized on Balance Sheet) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansAmountsRecognizedOnBalanceSheetDetails</Role>
      <ShortName>Employee Benefit Plans (Amounts Recognized on Balance Sheet) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>2406416 - Disclosure - Employee Benefit Plans (Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansAmountsRecognizedInAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Employee Benefit Plans (Amounts Recognized in Accumulated Other Comprehensive Income (Loss) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>2406417 - Disclosure - Employee Benefit Plans (Amount to be Amortized from Accumulated Other Comprehensive Income (Loss)) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansAmountToBeAmortizedFromAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Employee Benefit Plans (Amount to be Amortized from Accumulated Other Comprehensive Income (Loss)) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>2406418 - Disclosure - Employee Benefit Plans (Actuarial Assumptions) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansActuarialAssumptionsDetails</Role>
      <ShortName>Employee Benefit Plans (Actuarial Assumptions) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>2406419 - Disclosure - Employee Benefit Plans (Benefit Payments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansBenefitPaymentsDetails</Role>
      <ShortName>Employee Benefit Plans (Benefit Payments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>2406420 - Disclosure - Employee Benefit Plans (Deferred Compensation Plan Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/EmployeeBenefitPlansDeferredCompensationPlanNarrativeDetails</Role>
      <ShortName>Employee Benefit Plans (Deferred Compensation Plan Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/EmployeeBenefitPlansTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>2407402 - Disclosure - Other Income (Expense), net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/OtherIncomeExpenseNetDetails</Role>
      <ShortName>Other Income (Expense), net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/OtherIncomeExpenseNetTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>2408402 - Disclosure - Income Taxes (Income (Loss) Before Income Taxes) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxesIncomeLossBeforeIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Income (Loss) Before Income Taxes) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/IncomeTaxesTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>2408403 - Disclosure - Income Taxes (Provision for (Benefit From) Income Taxes) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxesProvisionForBenefitFromIncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Provision for (Benefit From) Income Taxes) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/IncomeTaxesTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>2408404 - Disclosure - Income Taxes (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxesNarrativeDetails</Role>
      <ShortName>Income Taxes (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/IncomeTaxesTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>2408405 - Disclosure - Income Taxes (Effective Income Tax Rate Reconciliation) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxesEffectiveIncomeTaxRateReconciliationDetails</Role>
      <ShortName>Income Taxes (Effective Income Tax Rate Reconciliation) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/IncomeTaxesTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>2408406 - Disclosure - Income Taxes (Deferred Income Tax Assets and Liabilities) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxesDeferredIncomeTaxAssetsAndLiabilitiesDetails</Role>
      <ShortName>Income Taxes (Deferred Income Tax Assets and Liabilities) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/IncomeTaxesTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>2408407 - Disclosure - Income Taxes (Unrecognized Tax Benefits) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/IncomeTaxesUnrecognizedTaxBenefitsDetails</Role>
      <ShortName>Income Taxes (Unrecognized Tax Benefits) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/IncomeTaxesTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>2409402 - Disclosure - Balance Sheet Components (Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BalanceSheetComponentsAssetsDetails</Role>
      <ShortName>Balance Sheet Components (Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BalanceSheetComponentsTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>2409403 - Disclosure - Balance Sheet Components (Balance Sheet Liability) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/BalanceSheetComponentsBalanceSheetLiabilityDetails</Role>
      <ShortName>Balance Sheet Components (Balance Sheet Liability) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/BalanceSheetComponentsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>2410402 - Disclosure - Fair Value Measurements (Financial Assets and Liabilities, Classified by Level) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/FairValueMeasurementsFinancialAssetsAndLiabilitiesClassifiedByLevelDetails</Role>
      <ShortName>Fair Value Measurements (Financial Assets and Liabilities, Classified by Level) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>2410403 - Disclosure - Fair Value Measurements (Change in Fair Value of Contingent Consideration) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/FairValueMeasurementsChangeInFairValueOfContingentConsiderationDetails</Role>
      <ShortName>Fair Value Measurements (Change in Fair Value of Contingent Consideration) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>2410404 - Disclosure - Fair Value Measurements (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/FairValueMeasurementsNarrativeDetails</Role>
      <ShortName>Fair Value Measurements (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/FairValueMeasurementsTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>2411402 - Disclosure - Derivative Financial Instruments (Fair Value of Derivative Instruments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DerivativeFinancialInstrumentsFairValueOfDerivativeInstrumentsDetails</Role>
      <ShortName>Derivative Financial Instruments (Fair Value of Derivative Instruments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DerivativeFinancialInstrumentsTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>2411403 - Disclosure - Derivative Financial Instruments (Gains and Losses on Derivative Instruments) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DerivativeFinancialInstrumentsGainsAndLossesOnDerivativeInstrumentsDetails</Role>
      <ShortName>Derivative Financial Instruments (Gains and Losses on Derivative Instruments) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DerivativeFinancialInstrumentsTables</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>2411404 - Disclosure - Derivative Financial Instruments (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/DerivativeFinancialInstrumentsNarrativeDetails</Role>
      <ShortName>Derivative Financial Instruments (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/DerivativeFinancialInstrumentsTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>2412402 - Disclosure - Goodwill and Other Intangible Assets (Goodwill) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssetsGoodwillDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets (Goodwill) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssetsTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>2412403 - Disclosure - Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssetsScheduleOfIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets (Schedule of Intangible Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssetsTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>2412404 - Disclosure - Goodwill and Other Intangible Assets (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssetsNarrativeDetails</Role>
      <ShortName>Goodwill and Other Intangible Assets (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/GoodwillAndOtherIntangibleAssetsTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>2413401 - Disclosure - Financing Arrangements (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/FinancingArrangementsDetails</Role>
      <ShortName>Financing Arrangements (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/FinancingArrangements</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>2414402 - Disclosure - Commitments and Contingencies (Operating Leases) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/CommitmentsAndContingenciesOperatingLeasesDetails</Role>
      <ShortName>Commitments and Contingencies (Operating Leases) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/CommitmentsAndContingenciesTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>2414403 - Disclosure - Commitments and Contingencies (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/CommitmentsAndContingenciesNarrativeDetails</Role>
      <ShortName>Commitments and Contingencies (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/CommitmentsAndContingenciesTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>2414404 - Disclosure - Commitments and Contingencies (Product Warranties) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/CommitmentsAndContingenciesProductWarrantiesDetails</Role>
      <ShortName>Commitments and Contingencies (Product Warranties) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/CommitmentsAndContingenciesTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>2415402 - Disclosure - Shareholders' Equity (Narrative) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ShareholdersEquityNarrativeDetails</Role>
      <ShortName>Shareholders' Equity (Narrative) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/ShareholdersEquityTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>2415403 - Disclosure - Shareholders' Equity (Share Buyback Programs) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ShareholdersEquityShareBuybackProgramsDetails</Role>
      <ShortName>Shareholders' Equity (Share Buyback Programs) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/ShareholdersEquityTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R93.htm</HtmlFileName>
      <LongName>2415404 - Disclosure - Shareholders' Equity (Accumulated Other Comprehensive Income (Loss)) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ShareholdersEquityAccumulatedOtherComprehensiveIncomeLossDetails</Role>
      <ShortName>Shareholders' Equity (Accumulated Other Comprehensive Income (Loss)) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/ShareholdersEquityTables</ParentRole>
      <Position>93</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R94.htm</HtmlFileName>
      <LongName>2416402 - Disclosure - Segment Information (Net Sales by Product Categories) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SegmentInformationNetSalesByProductCategoriesDetails</Role>
      <ShortName>Segment Information (Net Sales by Product Categories) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/SegmentInformationTables</ParentRole>
      <Position>94</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R95.htm</HtmlFileName>
      <LongName>2416403 - Disclosure - Segment Information (Net Sales by Geographic Region) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SegmentInformationNetSalesByGeographicRegionDetails</Role>
      <ShortName>Segment Information (Net Sales by Geographic Region) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/SegmentInformationTables</ParentRole>
      <Position>95</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R96.htm</HtmlFileName>
      <LongName>2416404 - Disclosure - Segment Information (Geographic Long-Lived Assets) (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/SegmentInformationGeographicLongLivedAssetsDetails</Role>
      <ShortName>Segment Information (Geographic Long-Lived Assets) (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/SegmentInformationTables</ParentRole>
      <Position>96</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R97.htm</HtmlFileName>
      <LongName>2417402 - Disclosure - Restructuring (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/RestructuringDetails</Role>
      <ShortName>Restructuring (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/RestructuringTables</ParentRole>
      <Position>97</Position>
    </Report>
    <Report instance="logi-20180331.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R98.htm</HtmlFileName>
      <LongName>2419401 - Disclosure - Schedule II - VALUATION AND QUALIFYING ACCOUNTS (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://www.logitech.com/role/ScheduleIiValuationAndQualifyingAccountsDetails</Role>
      <ShortName>Schedule II - VALUATION AND QUALIFYING ACCOUNTS (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://www.logitech.com/role/ScheduleIiValuationAndQualifyingAccounts</ParentRole>
      <Position>98</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>logi-20180331.xml</File>
    <File>logi-20180331.xsd</File>
    <File>logi-20180331_cal.xml</File>
    <File>logi-20180331_def.xml</File>
    <File>logi-20180331_lab.xml</File>
    <File>logi-20180331_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://xbrl.sec.gov/invest/2013-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/country/2017-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2014-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
