<?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">0000091847</identifier>
        </entity>
        <period>
            <startDate>2026-06-09</startDate>
            <endDate>2026-06-09</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000091847</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-09</startDate>
            <endDate>2026-06-09</endDate>
        </period>
    </context>
    <context id="offrl_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000091847</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-09</startDate>
            <endDate>2026-06-09</endDate>
        </period>
    </context>
    <context id="offrl_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000091847</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-09</startDate>
            <endDate>2026-06-09</endDate>
        </period>
    </context>
    <context id="offrl_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000091847</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>4</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-09</startDate>
            <endDate>2026-06-09</endDate>
        </period>
    </context>
    <context id="offrl_5">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000091847</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>5</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-09</startDate>
            <endDate>2026-06-09</endDate>
        </period>
    </context>
    <context id="offrl_6">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000091847</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>6</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-09</startDate>
            <endDate>2026-06-09</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <ffd:FormTp contextRef="rc" id="ixv-455">N-2</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-456">N-2</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-457">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-458">0000091847</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-459">SOURCE CAPITAL /DE/</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-532">N-2</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-533">SOURCE CAPITAL /DE/</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-534">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_1" id="ixv-535">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_1" id="ixv-536">Common Stock, $1.00 par value per share </ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_1" id="ixv-537">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_1"
      decimals="2"
      id="ixv-538"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="7"
      id="ixv-539"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="2"
      id="ixv-540"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_2" id="ixv-541">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_2" id="ixv-542">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_2" id="ixv-543">Preferred Stock, $[   ] par value per share </ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_2" id="ixv-544">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_2"
      decimals="2"
      id="ixv-545"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_2"
      decimals="7"
      id="ixv-546"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_2"
      decimals="2"
      id="ixv-547"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_3" id="ixv-548">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_3" id="ixv-549">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_3" id="ixv-550">Subscription Rights </ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_3" id="ixv-551">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_3"
      decimals="2"
      id="ixv-552"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_3"
      decimals="7"
      id="ixv-553"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_3"
      decimals="2"
      id="ixv-554"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_4" id="ixv-555">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_4" id="ixv-556">Debt</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_4" id="ixv-557">Debt Securities </ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_4" id="ixv-558">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_4"
      decimals="2"
      id="ixv-559"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_4"
      decimals="7"
      id="ixv-560"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_4"
      decimals="2"
      id="ixv-561"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_5" id="ixv-562">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_5" id="ixv-563">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_5" id="ixv-564">Warrants</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_5" id="ixv-565">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_5"
      decimals="2"
      id="ixv-566"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_5"
      decimals="7"
      id="ixv-567"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_5"
      decimals="2"
      id="ixv-568"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="offrl_6" id="ixv-569">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="offrl_6" id="ixv-570">Other</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="offrl_6" id="ixv-571">Unallocated (Universal)  Shelf</ffd:OfferingSctyTitl>
    <ffd:Rule457oFlg contextRef="offrl_6" id="ixv-572">true</ffd:Rule457oFlg>
    <ffd:MaxAggtOfferingPric
      contextRef="offrl_6"
      decimals="2"
      id="ixv-573"
      unitRef="USD">1000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="offrl_6"
      decimals="7"
      id="ixv-574"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_6"
      decimals="2"
      id="ixv-575"
      unitRef="USD">138.10</ffd:FeeAmt>
    <ffd:TtlOfferingAmt contextRef="rc" decimals="2" id="ixv-576" unitRef="USD">1000000.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt contextRef="rc" decimals="2" id="ixv-577" unitRef="USD">138.10</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="2" id="ixv-578" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="2" id="ixv-579" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="2" id="ixv-580" unitRef="USD">138.10</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-581">Subject to Note 5 below, there is being registered hereunder an indeterminate number of shares of common stock, preferred stock or warrants as may be sold, from time to time. Warrants represent rights to purchase common stock, preferred stock or debt securities. In no event will the aggregate offering price of all securities issued from time to time pursuant to this registration statement exceed $[  ].</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_2" id="ixv-582">Subject to Note 5 below, there is being registered hereunder an indeterminate number of shares of common stock, preferred stock or warrants as may be sold, from time to time. Warrants represent rights to purchase common stock, preferred stock or debt securities. In no event will the aggregate offering price of all securities issued from time to time pursuant to this registration statement exceed $[  ].</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_3" id="ixv-583">Subject to Note 5 below, there is being registered hereunder an indeterminate number of subscription rights as may be sold, from time to time, representing rights to purchase common stock.</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_4" id="ixv-584">Subject to Note 5 below, there is being registered hereunder an indeterminate principal amount of debt securities as may be sold, from time to time. If any debt securities are issued at an original issue discount, then the offering price shall be in such greater principal amount as shall result in an aggregate price to investors not to exceed $[-].</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_5" id="ixv-585">Subject to Note 5 below, there is being registered hereunder an indeterminate number of shares of common stock, preferred stock or warrants as may be sold, from time to time. Warrants represent rights to purchase common stock, preferred stock or debt securities. In no event will the aggregate offering price of all securities issued from time to time pursuant to this registration statement exceed $[  ].</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="offrl_6" id="ixv-586">In no event will the aggregate offering price of all securities issued from time to time pursuant to this registration statement exceed $1,000,000. </ffd:OfferingNote>
</xbrl>
