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            <identifier scheme="http://www.sec.gov/CIK">0000036270</identifier>
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            <startDate>2026-07-16</startDate>
            <endDate>2026-07-16</endDate>
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    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000036270</identifier>
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            <startDate>2026-07-16</startDate>
            <endDate>2026-07-16</endDate>
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    <context id="offrl_2">
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            <identifier scheme="http://www.sec.gov/CIK">0000036270</identifier>
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        <period>
            <startDate>2026-07-16</startDate>
            <endDate>2026-07-16</endDate>
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    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
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    <unit id="Shares">
        <measure>shares</measure>
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    <ffd:FormTp contextRef="rc" id="ixv-370">S-3</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-371">424B5</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-372">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:RegnFileNb contextRef="rc" id="ixv-373">333-274646</ffd:RegnFileNb>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-374">0000036270</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-375">M&amp;T BANK CORP</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
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    <ffd:FormTp contextRef="rc" id="ixv-412">S-3</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-413">M&amp;T BANK CORP</dei:EntityRegistrantName>
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      contextRef="offrl_1"
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      id="ixv-418"
      unitRef="Shares">600000000</ffd:AmtSctiesRegd>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-419"
      unitRef="USD">1.00</ffd:MaxOfferingPricPerScty>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-420"
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      contextRef="offrl_1"
      decimals="7"
      id="ixv-421"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_1"
      decimals="2"
      id="ixv-422"
      unitRef="USD">82860.00</ffd:FeeAmt>
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      contextRef="offrl_2"
      decimals="2"
      id="ixv-427"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
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      contextRef="offrl_2"
      decimals="7"
      id="ixv-428"
      unitRef="pure">0.0001381</ffd:FeeRate>
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      contextRef="offrl_2"
      decimals="2"
      id="ixv-429"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-430" unitRef="USD">600000000.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-431" unitRef="USD">82860.00</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-432" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-433" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-434" unitRef="USD">82860.00</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-435">(1) The filing fee is calculated in accordance with 457(o) and 457(r) of the Securities Act of 1933, as amended (the "Act"). In accordance with Rule 456(b) and 457(r) of the Act, the registrant initially deferred payment of all of the registration fee for Registration Statement No. 333-274646 filed on September 22, 2023.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-436">(1) The filing fee is calculated in accordance with 457(o) and 457(r) of the Securities Act of 1933, as amended (the "Act"). In accordance with Rule 456(b) and 457(r) of the Act, the registrant initially deferred payment of all of the registration fee for Registration Statement No. 333-274646 filed on September 22, 2023. (2) No separate consideration will be payable in respect of shares of Perpetual 6.625% Non-Cumulative Preferred Stock, Series L, which are issued in connection with this offering.</ffd:OfferingNote>
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    <ffd:FnlPrspctsFlg contextRef="rc" id="ixv-438">true</ffd:FnlPrspctsFlg>
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