<?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"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
    <link:schemaRef
      xlink:href="https://xbrl.sec.gov/ffd/2025/ffd-2025.xsd"
      xlink:type="simple"/>
    <context id="c_offering_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001616203</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-05</startDate>
            <endDate>2026-06-05</endDate>
        </period>
    </context>
    <context id="c_offering_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001616203</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-05</startDate>
            <endDate>2026-06-05</endDate>
        </period>
    </context>
    <context id="c_offset_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001616203</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-05</startDate>
            <endDate>2026-06-05</endDate>
        </period>
    </context>
    <context id="c_offset_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001616203</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OffsetAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-06-05</startDate>
            <endDate>2026-06-05</endDate>
        </period>
    </context>
    <context id="c_report">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001616203</identifier>
        </entity>
        <period>
            <startDate>2026-06-05</startDate>
            <endDate>2026-06-05</endDate>
        </period>
    </context>
    <unit id="USD">
        <measure>iso4217:USD</measure>
    </unit>
    <unit id="pure">
        <measure>pure</measure>
    </unit>
    <ffd:SubmissnTp contextRef="c_report" id="fee_001">SC TO-I/A</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c_report" id="fee_002">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="c_report" id="fee_003">0001616203</dei:EntityCentralIndexKey>
    <ffd:Rule011Flg contextRef="c_offering_1" id="fee_004">true</ffd:Rule011Flg>
    <ffd:Rule011Flg contextRef="c_offering_2" id="fee_005">true</ffd:Rule011Flg>
    <ffd:OffsetClmdInd contextRef="c_offset_1" id="fee_006">true</ffd:OffsetClmdInd>
    <ffd:OffsetClmdInd contextRef="c_offset_2" id="fee_007">false</ffd:OffsetClmdInd>
    <ffd:OffsetPrrFormTp contextRef="c_offset_1" id="fee_008">SC TO</ffd:OffsetPrrFormTp>
    <ffd:OffsetPrrFormTp contextRef="c_offset_2" id="fee_009">SC TO</ffd:OffsetPrrFormTp>
    <ffd:OfferingTableNa contextRef="c_report" id="fee_010" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="c_report" id="fee_011" xsi:nil="true"/>
    <ffd:FormTp contextRef="c_report" id="fee_012">SC TO</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c_report" id="fee_013">Pomona Investment Fund</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c_offering_1" id="fee_014">false</ffd:PrevslyPdFlg>
    <ffd:TxValtn
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_015"
      unitRef="USD">7940495.66</ffd:TxValtn>
    <ffd:FeeRate
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_016"
      unitRef="pure">0.0001381</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_017"
      unitRef="USD">1096.58</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_2" id="fee_018">true</ffd:PrevslyPdFlg>
    <ffd:TxValtn
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_019"
      unitRef="USD">96976138.24</ffd:TxValtn>
    <ffd:FeeAmt
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_020"
      unitRef="USD">13392.40</ffd:FeeAmt>
    <ffd:TtlTxValtn
      contextRef="c_report"
      decimals="INF"
      id="fee_021"
      unitRef="USD">104916633.90</ffd:TtlTxValtn>
    <ffd:TtlFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_022"
      unitRef="USD">14488.98</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_023"
      unitRef="USD">13392.40</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_024"
      unitRef="USD">570.22</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_025"
      unitRef="USD">526.36</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c_offering_1" id="fee_026">Calculated as the aggregate maximum purchase price for Shares that could be purchased, based upon the net asset value of the Fund as of March 31, 2026&lt;br/&gt;&lt;br/&gt;The amount of the filing fee, calculated in accordance with Rule 0-11 under the Securities Exchange Act of 1934, as amended (the &#x201c;Exchange Act&#x201d;), as modified by Fee Rate Advisory No. 1 from October 1, 2025 to September 30, 2026, equals $138.10 per $1,000,000 of the Transaction Valuation of 5% of the net asset value at March 31, 2026</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_2" id="fee_027">Calculated as the aggregate maximum purchase price for Shares that could be purchased, based upon the net asset value of the Fund as of September 30, 2025&lt;br/&gt;&lt;br/&gt;Calculated at $138.10 per $1,000,000 of the Transaction Value of 5% of the net asset value at September 30, 2025</ffd:OfferingNote>
    <ffd:Rule011a2OffsetFlg contextRef="c_offset_1" id="fee_028">true</ffd:Rule011a2OffsetFlg>
    <ffd:OffsetPrrFileNb contextRef="c_offset_1" id="fee_029">005-89919</ffd:OffsetPrrFileNb>
    <ffd:OffsetClmInitlFilgDt contextRef="c_offset_1" id="fee_030">2025-09-22</ffd:OffsetClmInitlFilgDt>
    <ffd:OffsetClmdAmt
      contextRef="c_offset_1"
      decimals="INF"
      id="fee_031"
      unitRef="USD">570.22</ffd:OffsetClmdAmt>
    <ffd:Rule011a2OffsetFlg contextRef="c_offset_2" id="fee_032">true</ffd:Rule011a2OffsetFlg>
    <ffd:OffsetPrrFilerNm contextRef="c_offset_2" id="fee_033">Pomona Investment Fund</ffd:OffsetPrrFilerNm>
    <ffd:OffsetPrrFileNb contextRef="c_offset_2" id="fee_034">005-89919</ffd:OffsetPrrFileNb>
    <ffd:OffsetSrcFilgDt contextRef="c_offset_2" id="fee_035">2025-09-22</ffd:OffsetSrcFilgDt>
    <ffd:OffsetPrrFeeAmt
      contextRef="c_offset_2"
      decimals="INF"
      id="fee_036"
      unitRef="USD">570.22</ffd:OffsetPrrFeeAmt>
    <ffd:OffsetNote contextRef="c_offset_1" id="fee_037">An aggregate fee of $14,858.02 was paid with the filing of the Schedule TO-I by the Fund (File No. 005-89919) on September 22, 2025 (the &#x201c;September 2025 Schedule TO-I&#x201d;). The final transaction fee due pursuant to the final amendment to the September 2025 Schedule TO-I filed on March 6, 2026, was $14,287.80, leaving $570.22 of the filing fees remaining from the September 2025 Schedule TO-I for future offset claims. Pursuant to Rule 0-11(a)(2) under the Exchange Act, all $570.22 of the filing fees remaining from the September 2025 Schedule TO-I are being used to offset a portion of the filing fee due in connection with this Schedule TO-I/A.</ffd:OffsetNote>
</xbrl>
