<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:dei="http://xbrl.sec.gov/dei/2025"
  xmlns:ffd="http://xbrl.sec.gov/ffd/2025"
  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/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="From2026-09-17to2026-09-17">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000880406</identifier>
        </entity>
        <period>
            <startDate>2026-09-17</startDate>
            <endDate>2026-09-17</endDate>
        </period>
    </context>
    <context id="OfferingAxis_From2026-09-17to2026-09-17_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0000880406</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-09-17</startDate>
            <endDate>2026-09-17</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="Pure">
        <measure>pure</measure>
    </unit>
    <ffd:OffsetTableNa contextRef="From2026-09-17to2026-09-17" id="ixv-254">N/A</ffd:OffsetTableNa>
    <ffd:SubmissnTp contextRef="From2026-09-17to2026-09-17" id="ixv-255">SC TO-I</ffd:SubmissnTp>
    <dei:EntityCentralIndexKey contextRef="From2026-09-17to2026-09-17" id="ixv-256">0000880406</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="From2026-09-17to2026-09-17" id="ixv-257">Herzfeld Credit Income Fund, Inc.</dei:EntityRegistrantName>
    <ffd:FeeExhibitTp contextRef="From2026-09-17to2026-09-17" id="fid_4b203977">EX-FILING FEES</ffd:FeeExhibitTp>
    <ffd:FormTp contextRef="From2026-09-17to2026-09-17" id="fid_32a0af86">SC TO</ffd:FormTp>
    <ffd:PrevslyPdFlg
      contextRef="OfferingAxis_From2026-09-17to2026-09-17_1"
      id="fid_c97fa65b">false</ffd:PrevslyPdFlg>
    <ffd:TxValtn
      contextRef="OfferingAxis_From2026-09-17to2026-09-17_1"
      decimals="INF"
      id="fid_9140a634"
      unitRef="USD">1881528.56</ffd:TxValtn>
    <ffd:FeeRate
      contextRef="OfferingAxis_From2026-09-17to2026-09-17_1"
      decimals="INF"
      id="fid_36b74978"
      unitRef="Pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="OfferingAxis_From2026-09-17to2026-09-17_1"
      decimals="INF"
      id="fid_45ad264f"
      unitRef="USD">259.84</ffd:FeeAmt>
    <ffd:TtlTxValtn
      contextRef="From2026-09-17to2026-09-17"
      decimals="INF"
      id="fid_4e1a2a05"
      unitRef="USD">1881528.56</ffd:TtlTxValtn>
    <ffd:TtlFeeAmt
      contextRef="From2026-09-17to2026-09-17"
      decimals="INF"
      id="fid_7d4baf66"
      unitRef="USD">259.84</ffd:TtlFeeAmt>
    <ffd:NetFeeAmt
      contextRef="From2026-09-17to2026-09-17"
      decimals="INF"
      id="fid_6cc1cb8f"
      unitRef="USD">259.84</ffd:NetFeeAmt>
    <ffd:OfferingNote
      contextRef="OfferingAxis_From2026-09-17to2026-09-17_1"
      id="fid_faad9952">&lt;table cellpadding="0" style="border-spacing:0;text-align:justify;font:10pt times new roman;width:100%"&gt;&lt;tbody&gt;&lt;tr style="height:15px"&gt;&lt;td style="width:1%;vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;(1)&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;Calculated as the aggregate maximum purchase price for common stock, based upon the net asset value per share as of August 31, 2026, of $19.13. This amount is based upon the offer to purchase up to 100,886 common stock, par value $0.001 per share, of Herzfeld Credit Income Fund, Inc.&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="height:15px"&gt;&lt;td&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px;text-indent:30px"&gt;&#160;&lt;/p&gt;&lt;/td&gt;&lt;td&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;&#160;&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;tr style="height:15px"&gt;&lt;td style="width:1%;vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;(2)&lt;/p&gt;&lt;/td&gt;&lt;td style="vertical-align:top;"&gt;&lt;p style="font-size:10pt;font-family:times new roman;margin:0px"&gt;Calculated at $138.10 per $1,000,000.00 of the Transaction Valuation, pursuant to Rule 0-11 under the Securities Exchange Act of 1934, as amended, as modified by Fee Rate Advisory No. 1 for fiscal year 2026.&lt;/p&gt;&lt;/td&gt;&lt;/tr&gt;&lt;/tbody&gt;&lt;/table&gt;</ffd:OfferingNote>
    <ffd:Rule011Flg
      contextRef="OfferingAxis_From2026-09-17to2026-09-17_1"
      id="fid_8a699098">true</ffd:Rule011Flg>
</xbrl>
