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<xbrl
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  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025q4"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
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      xlink:href="https://xbrl.sec.gov/ffd/2025q4/ffd-2025q4.xsd"
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    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000086521</identifier>
        </entity>
        <period>
            <startDate>2026-03-25</startDate>
            <endDate>2026-03-25</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000086521</identifier>
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                <xbrldi:typedMember dimension="ffd:OfferingAxis">
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        <period>
            <startDate>2026-03-25</startDate>
            <endDate>2026-03-25</endDate>
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    <context id="offrl_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000086521</identifier>
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                <xbrldi:typedMember dimension="ffd:OfferingAxis">
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        <period>
            <startDate>2026-03-25</startDate>
            <endDate>2026-03-25</endDate>
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    <context id="offrl_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000086521</identifier>
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                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
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        <period>
            <startDate>2026-03-25</startDate>
            <endDate>2026-03-25</endDate>
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    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-374">S-3</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-375">S-3ASR</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-376">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-377">0000086521</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-378">SAN DIEGO GAS &amp; ELECTRIC CO</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-424">S-3</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-425">SAN DIEGO GAS &amp; ELECTRIC CO</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-426">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-427">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-428">First Mortgage Bonds</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg contextRef="offrl_1" id="ixv-429">true</ffd:Rule457rFlg>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="7"
      id="ixv-430"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:PrevslyPdFlg contextRef="offrl_2" id="ixv-431">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-432">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-433">Senior Debt Securities</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg contextRef="offrl_2" id="ixv-434">true</ffd:Rule457rFlg>
    <ffd:FeeRate
      contextRef="offrl_2"
      decimals="7"
      id="ixv-435"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:PrevslyPdFlg contextRef="offrl_3" id="ixv-436">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_3" id="ixv-437">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_3" id="ixv-438">Preferred Stock, without par value</ffd:OfferingSctyTitl>
    <ffd:Rule457rFlg contextRef="offrl_3" id="ixv-439">true</ffd:Rule457rFlg>
    <ffd:FeeRate
      contextRef="offrl_3"
      decimals="7"
      id="ixv-440"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-441" unitRef="USD">0.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-442" unitRef="USD">0.00</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-443" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-444" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-445" unitRef="USD">0.00</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-446">This registration statement registers an unspecified principal amount or number of first mortgage bonds, senior debt securities and shares of preferred stock, as applicable, as may from time to time be offered at unspecified prices. The proposed maximum offering prices per security and aggregate offering prices per class of securities will be determined from time to time by the registrant in connection with the issuance by the registrant of the securities registered hereunder and is not specified as to each class of security. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities, or that are issued in units. Pursuant to Form S-3 Instruction 2.A.iii.c. of the Instructions to the Calculation of Filing Fee Tables and Related Disclosure, the registrant elects to pay all of the registration fee on a deferred basis in reliance upon Rules 456(b) and 457(r) under the Securities Act of 1933, as amended, at the fee rate in effect at that time.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-447">This registration statement registers an unspecified principal amount or number of first mortgage bonds, senior debt securities and shares of preferred stock, as applicable, as may from time to time be offered at unspecified prices. The proposed maximum offering prices per security and aggregate offering prices per class of securities will be determined from time to time by the registrant in connection with the issuance by the registrant of the securities registered hereunder and is not specified as to each class of security. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities, or that are issued in units. Pursuant to Form S-3 Instruction 2.A.iii.c. of the Instructions to the Calculation of Filing Fee Tables and Related Disclosure, the registrant elects to pay all of the registration fee on a deferred basis in reliance upon Rules 456(b) and 457(r) under the Securities Act of 1933, as amended, at the fee rate in effect at that time.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_3" id="ixv-448">This registration statement registers an unspecified principal amount or number of first mortgage bonds, senior debt securities and shares of preferred stock, as applicable, as may from time to time be offered at unspecified prices. The proposed maximum offering prices per security and aggregate offering prices per class of securities will be determined from time to time by the registrant in connection with the issuance by the registrant of the securities registered hereunder and is not specified as to each class of security. Separate consideration may or may not be received for securities that are issuable on exercise, conversion or exchange of other securities, or that are issued in units. Pursuant to Form S-3 Instruction 2.A.iii.c. of the Instructions to the Calculation of Filing Fee Tables and Related Disclosure, the registrant elects to pay all of the registration fee on a deferred basis in reliance upon Rules 456(b) and 457(r) under the Securities Act of 1933, as amended, at the fee rate in effect at that time.</ffd:OfferingNote>
</xbrl>
