<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
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    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
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    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001836981</identifier>
        </entity>
        <period>
            <startDate>2026-07-30</startDate>
            <endDate>2026-07-30</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001836981</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
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        <period>
            <startDate>2026-07-30</startDate>
            <endDate>2026-07-30</endDate>
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    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-345">S-3</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-346">424B5</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-347">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:RegnFileNb contextRef="rc" id="ixv-348">333-289678</ffd:RegnFileNb>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-349">0001836981</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-350">BigBear.ai Holdings, Inc.</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="rc" id="hiddenrcCombinedProspectusTableNa">N/A</ffd:CombinedProspectusTableNa>
    <ffd:FormTp contextRef="rc" id="ixv-378">S-3</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-379">BigBear.ai Holdings, Inc.</dei:EntityRegistrantName>
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      contextRef="offrl_1"
      decimals="0"
      id="ixv-384"
      unitRef="Shares">100000000</ffd:AmtSctiesRegd>
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      contextRef="offrl_1"
      decimals="4"
      id="ixv-385"
      unitRef="USD">2.6825</ffd:MaxOfferingPricPerScty>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-386"
      unitRef="USD">268250000.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_1"
      decimals="7"
      id="ixv-387"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-388"
      unitRef="USD">37045.32</ffd:FeeAmt>
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    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-392" unitRef="USD">0.00</ffd:TtlOffsetAmt>
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    <ffd:OfferingNote contextRef="offrl_1" id="ixv-394">Estimated solely for the purpose of calculating the registration fee, based on the average of the high and low prices of the common stock on the New York Stock Exchange on July 29, 2026 (such date being within five business days of the date that this registration statement was filed with the Securities and Exchange Commission). This calculation is in accordance with Rule 457(c) of the Securities Act of 1933.</ffd:OfferingNote>
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    <ffd:FnlPrspctsFlg contextRef="rc" id="ixv-396">true</ffd:FnlPrspctsFlg>
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