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<xbrl
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  xmlns:dei="http://xbrl.sec.gov/dei/2026"
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      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
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    <context id="c0">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000025598</identifier>
        </entity>
        <period>
            <startDate>2026-08-07</startDate>
            <endDate>2026-08-07</endDate>
        </period>
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    <context id="c1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000025598</identifier>
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        <period>
            <startDate>2026-08-07</startDate>
            <endDate>2026-08-07</endDate>
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    <context id="c2">
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        <period>
            <startDate>2026-08-07</startDate>
            <endDate>2026-08-07</endDate>
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    </context>
    <unit id="shares">
        <measure>shares</measure>
    </unit>
    <unit id="usd">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
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    <dei:EntityRegistrantName contextRef="c0" id="ixv-25">OneMain Finance Corporation</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c1" id="ixv-140">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c1" id="ixv-141">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c1" id="ixv-142">7.125% Senior Notes due 2034</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg contextRef="c1" id="ixv-143">true</ffd:Rule457rFlg>
    <ffd:AmtSctiesRegd
      contextRef="c1"
      decimals="INF"
      id="ixv-144"
      unitRef="shares">600000000</ffd:AmtSctiesRegd>
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      contextRef="c1"
      decimals="INF"
      id="ixv-145"
      unitRef="shares">1</ffd:MaxOfferingPricPerScty>
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    <ffd:OfferingSctyTp contextRef="c2" id="ixv-150">Other</ffd:OfferingSctyTp>
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    <ffd:FeesOthrRuleFlg contextRef="c2" id="ixv-152">true</ffd:FeesOthrRuleFlg>
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    <ffd:TtlOfferingAmt contextRef="c0" decimals="INF" id="ixv-154" unitRef="usd">600000000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="c0" decimals="2" id="ixv-155" unitRef="usd">82860</ffd:TtlFeeAmt>
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    <ffd:TtlOffsetAmt contextRef="c0" decimals="0" id="ixv-157" unitRef="usd">0</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="c0" decimals="2" id="ixv-158" unitRef="usd">82860</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c1" id="ixv-124">&lt;table style="font-size: 12pt; border-spacing: 0px; border-collapse: collapse; width: 100%;"&gt; &lt;tr style="height: 0px; font-size: 0px;"&gt;&lt;td style="width: 1%;"&gt;&#160;&lt;/td&gt;&lt;td style="width: 99%;"&gt;&#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="vertical-align: top;"&gt; &lt;td style="padding: 0px 0pt;"&gt; &lt;div style="margin-bottom: 4pt;"&gt; &lt;span style="font-size: 10.0pt;"&gt;(1)&lt;/span&gt; &lt;/div&gt; &lt;/td&gt; &lt;td style="padding: 0px 5.4pt; text-align: left; font-size: 10pt;"&gt; &lt;div style="margin-bottom: 4pt;"&gt; Guarantee of OneMain
Finance Corporation&#x2019;s 7.125% Senior Notes due 2034 by its direct parent company
OneMain Holdings, Inc. Pursuant to Rule 457(n) under the Securities Act of
1933, as amended (the &#x201c;Securities Act&#x201d;), no separate fee is payable with
respect to the guarantee. &lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c2" id="ixv-125">&lt;table style="font-size: 12pt; border-spacing: 0px; border-collapse: collapse; width: 100%;"&gt; &lt;tr style="height: 0px; font-size: 0px;"&gt;&lt;td style="width: 1%;"&gt;&#160;&lt;/td&gt;&lt;td style="width: 99%;"&gt;&#160;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="vertical-align: top;"&gt; &lt;td style="padding: 0px 0pt;"&gt; &lt;div style="margin-bottom: 4pt;"&gt; &lt;span style="font-size: 10.0pt;"&gt;(1)&lt;/span&gt; &lt;/div&gt; &lt;/td&gt; &lt;td style="padding: 0px 5.4pt; text-align: left; font-size: 10pt;"&gt; &lt;div style="margin-bottom: 4pt;"&gt; Guarantee of OneMain
Finance Corporation&#x2019;s 7.125% Senior Notes due 2034 by its direct parent company
OneMain Holdings, Inc. Pursuant to Rule 457(n) under the Securities Act of
1933, as amended (the &#x201c;Securities Act&#x201d;), no separate fee is payable with
respect to the guarantee. &lt;/div&gt; &lt;/td&gt; &lt;/tr&gt; &lt;/table&gt;</ffd:OfferingNote>
    <ffd:SubmissnTp contextRef="c0" id="hidden-fact-0">424B5</ffd:SubmissnTp>
    <ffd:CombinedProspectusTableNa contextRef="c0" id="ixv-162">N/A</ffd:CombinedProspectusTableNa>
    <dei:EntityCentralIndexKey contextRef="c0" id="ixv-163">0000025598</dei:EntityCentralIndexKey>
    <ffd:FeeExhibitTp contextRef="c0" id="ixv-164">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:FormTp contextRef="c0" id="ixv-165">S-3</ffd:FormTp>
    <ffd:OffsetTableNa contextRef="c0" id="ixv-166">N/A</ffd:OffsetTableNa>
    <ffd:RegnFileNb contextRef="c0" id="ixv-167">333-274956-01</ffd:RegnFileNb>
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