<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2026"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
      xlink:type="simple"/>
    <context id="P09_09_2026To09_09_2026">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001335730</identifier>
        </entity>
        <period>
            <startDate>2026-09-09</startDate>
            <endDate>2026-09-09</endDate>
        </period>
    </context>
    <context id="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001335730</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-09</startDate>
            <endDate>2026-09-09</endDate>
        </period>
    </context>
    <unit id="Unit_USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Unit_pure">
        <measure>pure</measure>
    </unit>
    <unit id="Unit_shares">
        <measure>shares</measure>
    </unit>
    <dei:EntityCentralIndexKey contextRef="P09_09_2026To09_09_2026" id="ixv-217">0001335730</dei:EntityCentralIndexKey>
    <ffd:RegnFileNb contextRef="P09_09_2026To09_09_2026" id="ixv-218">333-282497</ffd:RegnFileNb>
    <ffd:FormTp contextRef="P09_09_2026To09_09_2026" id="ixv-219">F-3</ffd:FormTp>
    <ffd:SubmissnTp contextRef="P09_09_2026To09_09_2026" id="hidden171577888">424B2</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="P09_09_2026To09_09_2026" id="ixv-221">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:OffsetTableNa contextRef="P09_09_2026To09_09_2026" id="ixv-222">N/A</ffd:OffsetTableNa>
    <ffd:CombinedProspectusTableNa contextRef="P09_09_2026To09_09_2026" id="ixv-223">N/A</ffd:CombinedProspectusTableNa>
    <ffd:TtlPrevslyPdAmt
      contextRef="P09_09_2026To09_09_2026"
      decimals="0"
      id="hidden171577917"
      unitRef="Unit_USD">0</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt
      contextRef="P09_09_2026To09_09_2026"
      decimals="0"
      id="hidden171577920"
      unitRef="Unit_USD">0</ffd:TtlOffsetAmt>
    <dei:EntityRegistrantName contextRef="P09_09_2026To09_09_2026" id="ixv-250">Mizuho Financial Group, Inc.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      id="ixv-251">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      id="ixv-252">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      id="ixv-253">1,000,000,000 7.050% Fixed Rate Resetting Perpetual Subordinated Notes</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      id="ixv-254">true</ffd:Rule457rFlg>
    <ffd:AmtSctiesRegd
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      decimals="0"
      id="ixv-255"
      unitRef="Unit_shares">1000000000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      decimals="5"
      id="ixv-256"
      unitRef="Unit_pure">1</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      decimals="0"
      id="ixv-257"
      unitRef="Unit_USD">1000000000</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      decimals="8"
      id="ixv-258"
      unitRef="Unit_pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      decimals="0"
      id="ixv-259"
      unitRef="Unit_USD">138100</ffd:FeeAmt>
    <ffd:TtlOfferingAmt
      contextRef="P09_09_2026To09_09_2026"
      decimals="0"
      id="ixv-260"
      unitRef="Unit_USD">1000000000</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt
      contextRef="P09_09_2026To09_09_2026"
      decimals="0"
      id="ixv-261"
      unitRef="Unit_USD">138100</ffd:TtlFeeAmt>
    <ffd:NetFeeAmt
      contextRef="P09_09_2026To09_09_2026"
      decimals="0"
      id="ixv-262"
      unitRef="Unit_USD">138100</ffd:NetFeeAmt>
    <ffd:OfferingNote
      contextRef="P09_09_2026To09_09_2026_1TypedMemberffdOfferingAxis"
      id="ixv-208">
&lt;table cellpadding="0" cellspacing="0" style="text-align:start; BORDER-COLLAPSE:COLLAPSE; font-family:Times New Roman; font-size:10pt;border-spacing:0;width:100%"&gt;
&lt;tr style="page-break-inside:avoid"&gt;
&lt;td style="width:4%;vertical-align:top;text-align:left"&gt;&lt;span style="font-size:75%; vertical-align:top;display:inline;font-size:8.3px"&gt;1&lt;/span&gt;&#160;&lt;/td&gt;
&lt;td style="vertical-align:top;text-align:left"&gt;&lt;div style=" margin-top:0pt ; margin-bottom:0pt; font-size:10pt; font-family:Times New Roman;text-align:left"&gt;Final prospectus supplement &lt;/div&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/table&gt;</ffd:OfferingNote>
</xbrl>
