<?xml version='1.0' encoding='utf-8'?>
<FilingSummary>
  <Version>3.19.1</Version>
  <ProcessingTime/>
  <ReportFormat>html</ReportFormat>
  <ContextCount>253</ContextCount>
  <ElementCount>470</ElementCount>
  <EntityCount>1</EntityCount>
  <FootnotesReported>true</FootnotesReported>
  <SegmentCount>73</SegmentCount>
  <ScenarioCount>0</ScenarioCount>
  <TuplesReported>false</TuplesReported>
  <UnitCount>6</UnitCount>
  <MyReports>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R1.htm</HtmlFileName>
      <LongName>00000001 - Document - Document and Entity Information</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/DocumentAndEntityInformation</Role>
      <ShortName>Document and Entity Information</ShortName>
      <MenuCategory>Cover</MenuCategory>
      <Position>1</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R2.htm</HtmlFileName>
      <LongName>00000002 - Statement - Consolidated Balance Sheets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/BalanceSheets</Role>
      <ShortName>Consolidated Balance Sheets</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>2</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R3.htm</HtmlFileName>
      <LongName>00000003 - Statement - Consolidated Balance Sheets (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/BalanceSheetsParenthetical</Role>
      <ShortName>Consolidated Balance Sheets (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>3</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R4.htm</HtmlFileName>
      <LongName>00000004 - Statement - Consolidated Statements of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StatementsOfOperations</Role>
      <ShortName>Consolidated Statements of Operations</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>4</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R5.htm</HtmlFileName>
      <LongName>00000005 - Statement - Consolidated Statements of Comprehensive Income</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StatementsOfComprehensiveIncome</Role>
      <ShortName>Consolidated Statements of Comprehensive Income</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>5</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R6.htm</HtmlFileName>
      <LongName>00000006 - Statement - Consolidated Statements of Comprehensive Income (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StatementsOfComprehensiveIncomeParenthetical</Role>
      <ShortName>Consolidated Statements of Comprehensive Income (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>6</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R7.htm</HtmlFileName>
      <LongName>00000007 - Statement - Consolidated Statements of Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StatementsOfStockholdersEquity</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>7</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R8.htm</HtmlFileName>
      <LongName>00000008 - Statement - Consolidated Statements of Stockholders' Equity (Parenthetical)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StatementsOfStockholdersEquityParenthetical</Role>
      <ShortName>Consolidated Statements of Stockholders' Equity (Parenthetical)</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>8</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R9.htm</HtmlFileName>
      <LongName>00000009 - Statement - Consolidated Statements of Cash Flows</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StatementsOfCashFlows</Role>
      <ShortName>Consolidated Statements of Cash Flows</ShortName>
      <MenuCategory>Statements</MenuCategory>
      <Position>9</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R10.htm</HtmlFileName>
      <LongName>00000010 - Disclosure - Organization and Business</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OrganizationAndBusiness</Role>
      <ShortName>Organization and Business</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>10</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R11.htm</HtmlFileName>
      <LongName>00000011 - Disclosure - Summary of Significant Accounting Policies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/SummaryOfSignificantAccountingPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>11</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R12.htm</HtmlFileName>
      <LongName>00000012 - Disclosure - Revenue from Contracts with Customers</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/RevenueFromContractsWithCustomers</Role>
      <ShortName>Revenue from Contracts with Customers</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>12</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R13.htm</HtmlFileName>
      <LongName>00000013 - Disclosure - Allowance for Doubtful Accounts</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/AllowanceForDoubtfulAccounts</Role>
      <ShortName>Allowance for Doubtful Accounts</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>13</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R14.htm</HtmlFileName>
      <LongName>00000014 - Disclosure - Inventory</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/Inventory</Role>
      <ShortName>Inventory</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>14</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R15.htm</HtmlFileName>
      <LongName>00000015 - Disclosure - Property, Plant and Equipment</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PropertyPlantAndEquipment</Role>
      <ShortName>Property, Plant and Equipment</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>15</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R16.htm</HtmlFileName>
      <LongName>00000016 - Disclosure - Restructuring of Operations</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/RestructuringOfOperations</Role>
      <ShortName>Restructuring of Operations</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>16</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R17.htm</HtmlFileName>
      <LongName>00000017 - Disclosure - Goodwill and Intangible Assets</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/GoodwillAndIntangibleAssets</Role>
      <ShortName>Goodwill and Intangible Assets</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>17</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R18.htm</HtmlFileName>
      <LongName>00000018 - Disclosure - Accrued Expenses and Other Current Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/AccruedExpensesAndOtherCurrentLiabilities</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>18</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R19.htm</HtmlFileName>
      <LongName>00000019 - Disclosure - Debt</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/Debt</Role>
      <ShortName>Debt</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>19</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R20.htm</HtmlFileName>
      <LongName>00000020 - Disclosure - Other Non-Current Liabilities</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OtherNon-currentLiabilities</Role>
      <ShortName>Other Non-Current Liabilities</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>20</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R21.htm</HtmlFileName>
      <LongName>00000021 - Disclosure - Pension Plan</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlan</Role>
      <ShortName>Pension Plan</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>21</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R22.htm</HtmlFileName>
      <LongName>00000022 - Disclosure - Postretirement Health Care and Life Insurance Benefits</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefits</Role>
      <ShortName>Postretirement Health Care and Life Insurance Benefits</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>22</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R23.htm</HtmlFileName>
      <LongName>00000023 - Disclosure - Income Taxes</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxes</Role>
      <ShortName>Income Taxes</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>23</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R24.htm</HtmlFileName>
      <LongName>00000024 - Disclosure - Stockholders' Equity</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StockholdersEquity</Role>
      <ShortName>Stockholders' Equity</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>24</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R25.htm</HtmlFileName>
      <LongName>00000025 - Disclosure - Commitments and Contingencies</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/CommitmentsAndContingencies</Role>
      <ShortName>Commitments and Contingencies</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>25</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R26.htm</HtmlFileName>
      <LongName>00000026 - Disclosure - Other, Net</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OtherNet</Role>
      <ShortName>Other, Net</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>26</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R27.htm</HtmlFileName>
      <LongName>00000027 - Disclosure - Reportable Segments</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/ReportableSegments</Role>
      <ShortName>Reportable Segments</ShortName>
      <MenuCategory>Notes</MenuCategory>
      <Position>27</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R28.htm</HtmlFileName>
      <LongName>00000028 - Disclosure - Summary of Significant Accounting Policies (Policies)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesPolicies</Role>
      <ShortName>Summary of Significant Accounting Policies (Policies)</ShortName>
      <MenuCategory>Policies</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>28</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R29.htm</HtmlFileName>
      <LongName>00000029 - Disclosure - Summary of Significant Accounting Policies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesTables</Role>
      <ShortName>Summary of Significant Accounting Policies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/SummaryOfSignificantAccountingPolicies</ParentRole>
      <Position>29</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R30.htm</HtmlFileName>
      <LongName>00000030 - Disclosure - Revenue from Contracts with Customers (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/RevenueFromContractsWithCustomersTables</Role>
      <ShortName>Revenue from Contracts with Customers (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/RevenueFromContractsWithCustomers</ParentRole>
      <Position>30</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R31.htm</HtmlFileName>
      <LongName>00000031 - Disclosure - Allowance for Doubtful Accounts (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/AllowanceForDoubtfulAccountsTables</Role>
      <ShortName>Allowance for Doubtful Accounts (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/AllowanceForDoubtfulAccounts</ParentRole>
      <Position>31</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R32.htm</HtmlFileName>
      <LongName>00000032 - Disclosure - Inventory (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/InventoryTables</Role>
      <ShortName>Inventory (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/Inventory</ParentRole>
      <Position>32</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R33.htm</HtmlFileName>
      <LongName>00000033 - Disclosure - Property, Plant and Equipment (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PropertyPlantAndEquipmentTables</Role>
      <ShortName>Property, Plant and Equipment (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PropertyPlantAndEquipment</ParentRole>
      <Position>33</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R34.htm</HtmlFileName>
      <LongName>00000034 - Disclosure - Goodwill and Intangible Assets (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsTables</Role>
      <ShortName>Goodwill and Intangible Assets (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/GoodwillAndIntangibleAssets</ParentRole>
      <Position>34</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R35.htm</HtmlFileName>
      <LongName>00000035 - Disclosure - Accrued Expenses and Other Current Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/AccruedExpensesAndOtherCurrentLiabilities</ParentRole>
      <Position>35</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R36.htm</HtmlFileName>
      <LongName>00000036 - Disclosure - Debt (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/DebtTables</Role>
      <ShortName>Debt (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/Debt</ParentRole>
      <Position>36</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R37.htm</HtmlFileName>
      <LongName>00000037 - Disclosure - Other Non-Current Liabilities (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OtherNon-currentLiabilitiesTables</Role>
      <ShortName>Other Non-Current Liabilities (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/OtherNon-currentLiabilities</ParentRole>
      <Position>37</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R38.htm</HtmlFileName>
      <LongName>00000038 - Disclosure - Pension Plan (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanTables</Role>
      <ShortName>Pension Plan (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlan</ParentRole>
      <Position>38</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R39.htm</HtmlFileName>
      <LongName>00000039 - Disclosure - Postretirement Health Care and Life Insurance Benefits (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsTables</Role>
      <ShortName>Postretirement Health Care and Life Insurance Benefits (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefits</ParentRole>
      <Position>39</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R40.htm</HtmlFileName>
      <LongName>00000040 - Disclosure - Income Taxes (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxesTables</Role>
      <ShortName>Income Taxes (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/IncomeTaxes</ParentRole>
      <Position>40</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R41.htm</HtmlFileName>
      <LongName>00000041 - Disclosure - Stockholders' Equity (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StockholdersEquityTables</Role>
      <ShortName>Stockholders' Equity (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/StockholdersEquity</ParentRole>
      <Position>41</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R42.htm</HtmlFileName>
      <LongName>00000042 - Disclosure - Commitments and Contingencies (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/CommitmentsAndContingenciesTables</Role>
      <ShortName>Commitments and Contingencies (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/CommitmentsAndContingencies</ParentRole>
      <Position>42</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R43.htm</HtmlFileName>
      <LongName>00000043 - Disclosure - Other, Net (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OtherNetTables</Role>
      <ShortName>Other, Net (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/OtherNet</ParentRole>
      <Position>43</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R44.htm</HtmlFileName>
      <LongName>00000044 - Disclosure - Reportable Segments (Tables)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/ReportableSegmentsTables</Role>
      <ShortName>Reportable Segments (Tables)</ShortName>
      <MenuCategory>Tables</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/ReportableSegments</ParentRole>
      <Position>44</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R45.htm</HtmlFileName>
      <LongName>00000045 - Disclosure - Organization and Business (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OrganizationAndBusinessDetailsNarrative</Role>
      <ShortName>Organization and Business (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/OrganizationAndBusiness</ParentRole>
      <Position>45</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R46.htm</HtmlFileName>
      <LongName>00000046 - Disclosure - Summary of Significant Accounting Policies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesDetails</Role>
      <ShortName>Summary of Significant Accounting Policies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>46</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R47.htm</HtmlFileName>
      <LongName>00000047 - Disclosure - Summary of Significant Accounting Policies (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesDetails1</Role>
      <ShortName>Summary of Significant Accounting Policies (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>47</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R48.htm</HtmlFileName>
      <LongName>00000048 - Disclosure - Summary of Significant Accounting Policies (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesDetails2</Role>
      <ShortName>Summary of Significant Accounting Policies (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>48</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R49.htm</HtmlFileName>
      <LongName>00000049 - Disclosure - Summary of Significant Accounting Policies (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesDetailsNarrative</Role>
      <ShortName>Summary of Significant Accounting Policies (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/SummaryOfSignificantAccountingPoliciesTables</ParentRole>
      <Position>49</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R50.htm</HtmlFileName>
      <LongName>00000050 - Disclosure - Revenue from Contracts with Customers (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/RevenueFromContractsWithCustomersDetails</Role>
      <ShortName>Revenue from Contracts with Customers (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/RevenueFromContractsWithCustomersTables</ParentRole>
      <Position>50</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R51.htm</HtmlFileName>
      <LongName>00000051 - Disclosure - Revenue from Contracts with Customers (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/RevenueFromContractsWithCustomersDetails1</Role>
      <ShortName>Revenue from Contracts with Customers (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/RevenueFromContractsWithCustomersTables</ParentRole>
      <Position>51</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R52.htm</HtmlFileName>
      <LongName>00000052 - Disclosure - Revenue from Contracts with Customers (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/RevenueFromContractsWithCustomersDetailsNarrative</Role>
      <ShortName>Revenue from Contracts with Customers (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/RevenueFromContractsWithCustomersTables</ParentRole>
      <Position>52</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R53.htm</HtmlFileName>
      <LongName>00000053 - Disclosure - Allowance for Doubtful Accounts (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/AllowanceForDoubtfulAccountsDetails</Role>
      <ShortName>Allowance for Doubtful Accounts (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/AllowanceForDoubtfulAccountsTables</ParentRole>
      <Position>53</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R54.htm</HtmlFileName>
      <LongName>00000054 - Disclosure - Inventory (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/InventoryDetails</Role>
      <ShortName>Inventory (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/InventoryTables</ParentRole>
      <Position>54</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R55.htm</HtmlFileName>
      <LongName>00000055 - Disclosure - Property, Plant and Equipment (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PropertyPlantAndEquipmentDetails</Role>
      <ShortName>Property, Plant and Equipment (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PropertyPlantAndEquipmentTables</ParentRole>
      <Position>55</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R56.htm</HtmlFileName>
      <LongName>00000056 - Disclosure - Restructuring of Operations (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/RestructuringOfOperationsDetailsNarrative</Role>
      <ShortName>Restructuring of Operations (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/RestructuringOfOperations</ParentRole>
      <Position>56</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R57.htm</HtmlFileName>
      <LongName>00000057 - Disclosure - Goodwill and Intangible Assets (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsDetails</Role>
      <ShortName>Goodwill and Intangible Assets (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>57</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R58.htm</HtmlFileName>
      <LongName>00000058 - Disclosure - Goodwill and Intangible Assets (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsDetails1</Role>
      <ShortName>Goodwill and Intangible Assets (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>58</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R59.htm</HtmlFileName>
      <LongName>00000059 - Disclosure - Goodwill and Intangible Assets (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsDetails2</Role>
      <ShortName>Goodwill and Intangible Assets (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>59</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R60.htm</HtmlFileName>
      <LongName>00000060 - Disclosure - Goodwill and Intangible Assets (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsDetailsNarrative</Role>
      <ShortName>Goodwill and Intangible Assets (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/GoodwillAndIntangibleAssetsTables</ParentRole>
      <Position>60</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R61.htm</HtmlFileName>
      <LongName>00000061 - Disclosure - Accrued Expenses and Other Current Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/AccruedExpensesAndOtherCurrentLiabilitiesDetails</Role>
      <ShortName>Accrued Expenses and Other Current Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/AccruedExpensesAndOtherCurrentLiabilitiesTables</ParentRole>
      <Position>61</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R62.htm</HtmlFileName>
      <LongName>00000062 - Disclosure - Debt (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/DebtDetails</Role>
      <ShortName>Debt (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/DebtTables</ParentRole>
      <Position>62</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R63.htm</HtmlFileName>
      <LongName>00000063 - Disclosure - Debt (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/DebtDetailsNarrative</Role>
      <ShortName>Debt (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/DebtTables</ParentRole>
      <Position>63</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R64.htm</HtmlFileName>
      <LongName>00000064 - Disclosure - Other Non-Current Liabilities (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OtherNon-currentLiabilitiesDetails</Role>
      <ShortName>Other Non-Current Liabilities (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/OtherNon-currentLiabilitiesTables</ParentRole>
      <Position>64</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R65.htm</HtmlFileName>
      <LongName>00000065 - Disclosure - Pension Plan (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetails</Role>
      <ShortName>Pension Plan (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>65</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R66.htm</HtmlFileName>
      <LongName>00000066 - Disclosure - Pension Plan (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetails1</Role>
      <ShortName>Pension Plan (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>66</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R67.htm</HtmlFileName>
      <LongName>00000067 - Disclosure - Pension Plan (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetails2</Role>
      <ShortName>Pension Plan (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>67</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R68.htm</HtmlFileName>
      <LongName>00000068 - Disclosure - Pension Plan (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetails3</Role>
      <ShortName>Pension Plan (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>68</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R69.htm</HtmlFileName>
      <LongName>00000069 - Disclosure - Pension Plan (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetails4</Role>
      <ShortName>Pension Plan (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>69</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R70.htm</HtmlFileName>
      <LongName>00000070 - Disclosure - Pension Plan (Details 5)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetails5</Role>
      <ShortName>Pension Plan (Details 5)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>70</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R71.htm</HtmlFileName>
      <LongName>00000071 - Disclosure - Pension Plan (Details 6)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetails6</Role>
      <ShortName>Pension Plan (Details 6)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>71</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R72.htm</HtmlFileName>
      <LongName>00000072 - Disclosure - Pension Plan (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PensionPlanDetailsNarrative</Role>
      <ShortName>Pension Plan (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PensionPlanTables</ParentRole>
      <Position>72</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R73.htm</HtmlFileName>
      <LongName>00000073 - Disclosure - Postretirement Health Care and Life Insurance Benefits (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsDetails</Role>
      <ShortName>Postretirement Health Care and Life Insurance Benefits (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsTables</ParentRole>
      <Position>73</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R74.htm</HtmlFileName>
      <LongName>00000074 - Disclosure - Postretirement Health Care and Life Insurance Benefits (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsDetails1</Role>
      <ShortName>Postretirement Health Care and Life Insurance Benefits (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsTables</ParentRole>
      <Position>74</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R75.htm</HtmlFileName>
      <LongName>00000075 - Disclosure - Postretirement Health Care and Life Insurance Benefits (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsDetails2</Role>
      <ShortName>Postretirement Health Care and Life Insurance Benefits (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsTables</ParentRole>
      <Position>75</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R76.htm</HtmlFileName>
      <LongName>00000076 - Disclosure - Postretirement Health Care and Life Insurance Benefits (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsDetails3</Role>
      <ShortName>Postretirement Health Care and Life Insurance Benefits (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsTables</ParentRole>
      <Position>76</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R77.htm</HtmlFileName>
      <LongName>00000077 - Disclosure - Postretirement Health Care and Life Insurance Benefits (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsDetailsNarrative</Role>
      <ShortName>Postretirement Health Care and Life Insurance Benefits (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/PostretirementHealthCareAndLifeInsuranceBenefitsTables</ParentRole>
      <Position>77</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R78.htm</HtmlFileName>
      <LongName>00000078 - Disclosure - Income Taxes (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxesDetails</Role>
      <ShortName>Income Taxes (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/IncomeTaxesTables</ParentRole>
      <Position>78</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R79.htm</HtmlFileName>
      <LongName>00000079 - Disclosure - Income Taxes (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxesDetails1</Role>
      <ShortName>Income Taxes (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/IncomeTaxesTables</ParentRole>
      <Position>79</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R80.htm</HtmlFileName>
      <LongName>00000080 - Disclosure - Income Taxes (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxesDetails2</Role>
      <ShortName>Income Taxes (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/IncomeTaxesTables</ParentRole>
      <Position>80</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R81.htm</HtmlFileName>
      <LongName>00000081 - Disclosure - Income Taxes (Details 3)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxesDetails3</Role>
      <ShortName>Income Taxes (Details 3)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/IncomeTaxesTables</ParentRole>
      <Position>81</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R82.htm</HtmlFileName>
      <LongName>00000082 - Disclosure - Income Taxes (Details 4)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxesDetails4</Role>
      <ShortName>Income Taxes (Details 4)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/IncomeTaxesTables</ParentRole>
      <Position>82</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R83.htm</HtmlFileName>
      <LongName>00000083 - Disclosure - Income Taxes (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/IncomeTaxesDetailsNarrative</Role>
      <ShortName>Income Taxes (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/IncomeTaxesTables</ParentRole>
      <Position>83</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R84.htm</HtmlFileName>
      <LongName>00000084 - Disclosure - Stockholders' Equity (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StockholdersEquityDetails</Role>
      <ShortName>Stockholders' Equity (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/StockholdersEquityTables</ParentRole>
      <Position>84</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R85.htm</HtmlFileName>
      <LongName>00000085 - Disclosure - Stockholders' Equity (Details 1)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StockholdersEquityDetails1</Role>
      <ShortName>Stockholders' Equity (Details 1)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/StockholdersEquityTables</ParentRole>
      <Position>85</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R86.htm</HtmlFileName>
      <LongName>00000086 - Disclosure - Stockholders' Equity (Details 2)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StockholdersEquityDetails2</Role>
      <ShortName>Stockholders' Equity (Details 2)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/StockholdersEquityTables</ParentRole>
      <Position>86</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R87.htm</HtmlFileName>
      <LongName>00000087 - Disclosure - Stockholders' Equity (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/StockholdersEquityDetailsNarrative</Role>
      <ShortName>Stockholders' Equity (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/StockholdersEquityTables</ParentRole>
      <Position>87</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R88.htm</HtmlFileName>
      <LongName>00000088 - Disclosure - Commitments and Contingencies (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/CommitmentsAndContingenciesDetails</Role>
      <ShortName>Commitments and Contingencies (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/CommitmentsAndContingenciesTables</ParentRole>
      <Position>88</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R89.htm</HtmlFileName>
      <LongName>00000089 - Disclosure - Commitments and Contingencies (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/CommitmentsAndContingenciesDetailsNarrative</Role>
      <ShortName>Commitments and Contingencies (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/CommitmentsAndContingenciesTables</ParentRole>
      <Position>89</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R90.htm</HtmlFileName>
      <LongName>00000090 - Disclosure - Other, Net (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/OtherNetDetails</Role>
      <ShortName>Other, Net (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/OtherNetTables</ParentRole>
      <Position>90</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R91.htm</HtmlFileName>
      <LongName>00000091 - Disclosure - Reportable Segments (Details)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/ReportableSegmentsDetails</Role>
      <ShortName>Reportable Segments (Details)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/ReportableSegmentsTables</ParentRole>
      <Position>91</Position>
    </Report>
    <Report instance="roll-20190330.xml">
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <HtmlFileName>R92.htm</HtmlFileName>
      <LongName>00000092 - Disclosure - Reportable Segments (Details Narrative)</LongName>
      <ReportType>Sheet</ReportType>
      <Role>http://rbcbearings.com/role/ReportableSegmentsDetailsNarrative</Role>
      <ShortName>Reportable Segments (Details Narrative)</ShortName>
      <MenuCategory>Details</MenuCategory>
      <ParentRole>http://rbcbearings.com/role/ReportableSegmentsTables</ParentRole>
      <Position>92</Position>
    </Report>
    <Report>
      <IsDefault>false</IsDefault>
      <HasEmbeddedReports>false</HasEmbeddedReports>
      <LongName>All Reports</LongName>
      <ReportType>Book</ReportType>
      <ShortName>All Reports</ShortName>
    </Report>
  </MyReports>
  <InputFiles>
    <File>roll-20190330.xml</File>
    <File>roll-20190330.xsd</File>
    <File>roll-20190330_cal.xml</File>
    <File>roll-20190330_def.xml</File>
    <File>roll-20190330_lab.xml</File>
    <File>roll-20190330_pre.xml</File>
  </InputFiles>
  <SupplementalFiles/>
  <BaseTaxonomies>
    <BaseTaxonomy>http://fasb.org/srt/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/dei/2018-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://fasb.org/us-gaap/2019-01-31</BaseTaxonomy>
    <BaseTaxonomy>http://xbrl.sec.gov/currency/2019-01-31</BaseTaxonomy>
  </BaseTaxonomies>
  <HasPresentationLinkbase>true</HasPresentationLinkbase>
  <HasCalculationLinkbase>true</HasCalculationLinkbase>
</FilingSummary>
