<?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"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2026/ffd-2026.xsd"
      xlink:type="simple"/>
    <context id="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001487712</identifier>
        </entity>
        <period>
            <startDate>2026-09-11</startDate>
            <endDate>2026-09-11</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001487712</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-11</startDate>
            <endDate>2026-09-11</endDate>
        </period>
    </context>
    <context id="offrl_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001487712</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-11</startDate>
            <endDate>2026-09-11</endDate>
        </period>
    </context>
    <context id="offrl_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001487712</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-11</startDate>
            <endDate>2026-09-11</endDate>
        </period>
    </context>
    <context id="offrl_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001487712</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>4</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-11</startDate>
            <endDate>2026-09-11</endDate>
        </period>
    </context>
    <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-489">S-4</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-490">S-4</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-491">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-492">0001487712</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-493">SUMISHO AIR LEASE CORP</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-548">S-4</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-549">SUMISHO AIR LEASE CORP</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-550">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-551">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-552">4.400% Senior Notes due 2028</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_1" id="ixv-553">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-554"
      unitRef="Shares">800000000</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-555"
      unitRef="USD">800000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="7"
      id="ixv-556"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="2"
      id="ixv-557"
      unitRef="USD">110480.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_2" id="ixv-558">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-559">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-560">4.500% Senior Notes due 2029</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_2" id="ixv-561">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_2"
      decimals="0"
      id="ixv-562"
      unitRef="Shares">1200000000</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_2"
      decimals="2"
      id="ixv-563"
      unitRef="USD">1200000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_2"
      decimals="7"
      id="ixv-564"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_2"
      decimals="2"
      id="ixv-565"
      unitRef="USD">165720.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_3" id="ixv-566">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_3" id="ixv-567">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_3" id="ixv-568">4.850% Senior Notes due 2031</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_3" id="ixv-569">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_3"
      decimals="0"
      id="ixv-570"
      unitRef="Shares">1500000000</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_3"
      decimals="2"
      id="ixv-571"
      unitRef="USD">1500000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_3"
      decimals="7"
      id="ixv-572"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_3"
      decimals="2"
      id="ixv-573"
      unitRef="USD">207150.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_4" id="ixv-574">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_4" id="ixv-575">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_4" id="ixv-576">5.500% Senior Notes due 2036</ffd:OfferingSctyTitl>
    <ffd:FeesOthrRuleFlg contextRef="offrl_4" id="ixv-577">true</ffd:FeesOthrRuleFlg>
    <ffd:AmtSctiesRegd
      contextRef="offrl_4"
      decimals="0"
      id="ixv-578"
      unitRef="Shares">500000000</ffd:AmtSctiesRegd>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_4"
      decimals="2"
      id="ixv-579"
      unitRef="USD">500000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_4"
      decimals="7"
      id="ixv-580"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_4"
      decimals="2"
      id="ixv-581"
      unitRef="USD">69050.00</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-582" unitRef="USD">4000000000.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-583" unitRef="USD">552400.00</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-584" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-585" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-586" unitRef="USD">552400.00</ffd:NetFeeAmt>
    <ffd:Rule457fFlg contextRef="offrl_1" id="ixv-587">true</ffd:Rule457fFlg>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-588">Represents the aggregate principal amount of the applicable series of notes to be offered in the exchange offer to which the registration statement relates.</ffd:OfferingNote>
    <ffd:AmtSctiesRcvd
      contextRef="offrl_1"
      decimals="0"
      id="ixv-589"
      unitRef="Shares">800000000</ffd:AmtSctiesRcvd>
    <ffd:ValSctiesRcvdPerShr
      contextRef="offrl_1"
      decimals="2"
      id="ixv-590"
      unitRef="USD">1.00</ffd:ValSctiesRcvdPerShr>
    <ffd:ValSctiesRcvd
      contextRef="offrl_1"
      decimals="2"
      id="ixv-591"
      unitRef="USD">800000000.00</ffd:ValSctiesRcvd>
    <ffd:FeeNoteMaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-592"
      unitRef="USD">800000000.00</ffd:FeeNoteMaxAggtOfferingPric>
    <ffd:Rule457fFlg contextRef="offrl_2" id="ixv-593">true</ffd:Rule457fFlg>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-594">Represents the aggregate principal amount of the applicable series of notes to be offered in the exchange offer to which the registration statement relates.</ffd:OfferingNote>
    <ffd:AmtSctiesRcvd
      contextRef="offrl_2"
      decimals="0"
      id="ixv-595"
      unitRef="Shares">1200000000</ffd:AmtSctiesRcvd>
    <ffd:ValSctiesRcvdPerShr
      contextRef="offrl_2"
      decimals="2"
      id="ixv-596"
      unitRef="USD">1.00</ffd:ValSctiesRcvdPerShr>
    <ffd:ValSctiesRcvd
      contextRef="offrl_2"
      decimals="2"
      id="ixv-597"
      unitRef="USD">1200000000.00</ffd:ValSctiesRcvd>
    <ffd:FeeNoteMaxAggtOfferingPric
      contextRef="offrl_2"
      decimals="2"
      id="ixv-598"
      unitRef="USD">1200000000.00</ffd:FeeNoteMaxAggtOfferingPric>
    <ffd:Rule457fFlg contextRef="offrl_3" id="ixv-599">true</ffd:Rule457fFlg>
    <ffd:OfferingNote contextRef="offrl_3" id="ixv-600">Represents the aggregate principal amount of the applicable series of notes to be offered in the exchange offer to which the registration statement relates.</ffd:OfferingNote>
    <ffd:AmtSctiesRcvd
      contextRef="offrl_3"
      decimals="0"
      id="ixv-601"
      unitRef="Shares">1500000000</ffd:AmtSctiesRcvd>
    <ffd:ValSctiesRcvdPerShr
      contextRef="offrl_3"
      decimals="2"
      id="ixv-602"
      unitRef="USD">1.00</ffd:ValSctiesRcvdPerShr>
    <ffd:ValSctiesRcvd
      contextRef="offrl_3"
      decimals="2"
      id="ixv-603"
      unitRef="USD">1500000000.00</ffd:ValSctiesRcvd>
    <ffd:FeeNoteMaxAggtOfferingPric
      contextRef="offrl_3"
      decimals="2"
      id="ixv-604"
      unitRef="USD">1500000000.00</ffd:FeeNoteMaxAggtOfferingPric>
    <ffd:Rule457fFlg contextRef="offrl_4" id="ixv-605">true</ffd:Rule457fFlg>
    <ffd:OfferingNote contextRef="offrl_4" id="ixv-606">Represents the aggregate principal amount of the applicable series of notes to be offered in the exchange offer to which the registration statement relates.</ffd:OfferingNote>
    <ffd:AmtSctiesRcvd
      contextRef="offrl_4"
      decimals="0"
      id="ixv-607"
      unitRef="Shares">500000000</ffd:AmtSctiesRcvd>
    <ffd:ValSctiesRcvdPerShr
      contextRef="offrl_4"
      decimals="2"
      id="ixv-608"
      unitRef="USD">1.00</ffd:ValSctiesRcvdPerShr>
    <ffd:ValSctiesRcvd
      contextRef="offrl_4"
      decimals="2"
      id="ixv-609"
      unitRef="USD">500000000.00</ffd:ValSctiesRcvd>
    <ffd:FeeNoteMaxAggtOfferingPric
      contextRef="offrl_4"
      decimals="2"
      id="ixv-610"
      unitRef="USD">500000000.00</ffd:FeeNoteMaxAggtOfferingPric>
</xbrl>
