<?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="rc">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001913724</identifier>
        </entity>
        <period>
            <startDate>2025-09-26</startDate>
            <endDate>2025-09-26</endDate>
        </period>
    </context>
    <context id="offrl_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001913724</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-09-26</startDate>
            <endDate>2025-09-26</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-150">SC TO</ffd:FormTp>
    <ffd:SubmissnTp contextRef="rc" id="ixv-151">SC TO-I</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="rc" id="ixv-152">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="rc" id="ixv-153">0001913724</dei:EntityCentralIndexKey>
    <dei:EntityRegistrantName contextRef="rc" id="ixv-154">TPG Twin Brook Capital Income Fund</dei:EntityRegistrantName>
    <ffd:OfferingTableNa contextRef="rc" id="hiddenrcOfferingTableNa" xsi:nil="true"/>
    <ffd:OffsetTableNa contextRef="rc" id="hiddenrcOffsetTableNa">N/A</ffd:OffsetTableNa>
    <ffd:Rule011Flg contextRef="offrl_1" id="ixv-157">true</ffd:Rule011Flg>
    <ffd:PrevslyPdFlg contextRef="offrl_1" id="ixv-182">false</ffd:PrevslyPdFlg>
    <ffd:TxValtn
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-183"
      unitRef="USD">95672562.00</ffd:TxValtn>
    <ffd:FeeRate
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-184"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="offrl_1"
      decimals="INF"
      id="ixv-185"
      unitRef="USD">14647.47</ffd:FeeAmt>
    <ffd:TtlTxValtn contextRef="rc" decimals="INF" id="ixv-186" unitRef="USD">95672562.00</ffd:TtlTxValtn>
    <ffd:TtlFeeAmt contextRef="rc" decimals="INF" id="ixv-187" unitRef="USD">14647.47</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt contextRef="rc" decimals="INF" id="ixv-188" unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt contextRef="rc" decimals="INF" id="ixv-189" unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt contextRef="rc" decimals="INF" id="ixv-190" unitRef="USD">14647.47</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="offrl_1" id="ixv-191">The Transaction Value is calculated as the aggregate maximum purchase price for common shares of beneficial interest (the "Shares") of TPG Twin Brook Capital Income Fund (the "Fund"), based upon the net asset value per share as of July 31, 2025, of $25.29. This amount is based upon the offer to purchase up to 3,782.735 Shares, par value $0.001 per share, of the Fund. The Fee Rate is calculated at $153.10 per $1,000,000.00 of the Transaction Value in accordance with Rule 0-11 under the Securities Exchange Act of 1934, as amended, as modified by Fee Rate Advisory No.1 for fiscal year 2025.</ffd:OfferingNote>
</xbrl>
