<?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="c_offering_1">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002075310</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>1</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-09-09</startDate>
            <endDate>2025-09-09</endDate>
        </period>
    </context>
    <context id="c_offering_2">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002075310</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>2</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-09-09</startDate>
            <endDate>2025-09-09</endDate>
        </period>
    </context>
    <context id="c_offering_3">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002075310</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>3</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-09-09</startDate>
            <endDate>2025-09-09</endDate>
        </period>
    </context>
    <context id="c_offering_4">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002075310</identifier>
            <segment>
                <xbrldi:typedMember dimension="ffd:OfferingAxis">
                    <dei:lineNo>4</dei:lineNo>
                </xbrldi:typedMember>
            </segment>
        </entity>
        <period>
            <startDate>2025-09-09</startDate>
            <endDate>2025-09-09</endDate>
        </period>
    </context>
    <context id="c_report">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0002075310</identifier>
        </entity>
        <period>
            <startDate>2025-09-09</startDate>
            <endDate>2025-09-09</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:SubmissnTp contextRef="c_report" id="fee_001">S-1MEF</ffd:SubmissnTp>
    <ffd:FeeExhibitTp contextRef="c_report" id="fee_002">EX-FILING FEES</ffd:FeeExhibitTp>
    <dei:EntityCentralIndexKey contextRef="c_report" id="fee_003">0002075310</dei:EntityCentralIndexKey>
    <ffd:FormTp contextRef="c_report" id="fee_004">S-1</ffd:FormTp>
    <dei:EntityRegistrantName contextRef="c_report" id="fee_005">Trailblazer Acquisition Corp.</dei:EntityRegistrantName>
    <ffd:PrevslyPdFlg contextRef="c_offering_1" id="fee_006">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_1" id="fee_007">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_1" id="fee_008">Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-third of one redeemable warrant</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_1" id="fee_009">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_1"
      decimals="0"
      id="fee_010"
      unitRef="shares">4600000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_011"
      unitRef="USD">10.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_012"
      unitRef="USD">46000000.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_013"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_1"
      decimals="INF"
      id="fee_014"
      unitRef="USD">7043.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_2" id="fee_015">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_2" id="fee_016">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_2" id="fee_017">Class A ordinary shares included as part of the units</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_2" id="fee_018">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_2"
      decimals="0"
      id="fee_019"
      unitRef="shares">4600000</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_020"
      unitRef="USD">0.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_021"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_022"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_2"
      decimals="INF"
      id="fee_023"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_3" id="fee_024">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_3" id="fee_025">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_3" id="fee_026">Redeemable warrants included as part of the units</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_3" id="fee_027">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_3"
      decimals="0"
      id="fee_028"
      unitRef="shares">1533334</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_029"
      unitRef="USD">0.00</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_030"
      unitRef="USD">0.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_031"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_3"
      decimals="INF"
      id="fee_032"
      unitRef="USD">0.00</ffd:FeeAmt>
    <ffd:PrevslyPdFlg contextRef="c_offering_4" id="fee_033">false</ffd:PrevslyPdFlg>
    <ffd:OfferingSctyTp contextRef="c_offering_4" id="fee_034">Equity</ffd:OfferingSctyTp>
    <ffd:OfferingSctyTitl contextRef="c_offering_4" id="fee_035">Class A ordinary shares underlying redeemable warrants included as part of the units</ffd:OfferingSctyTitl>
    <ffd:Rule457aFlg contextRef="c_offering_4" id="fee_036">true</ffd:Rule457aFlg>
    <ffd:AmtSctiesRegd
      contextRef="c_offering_4"
      decimals="0"
      id="fee_037"
      unitRef="shares">1533334</ffd:AmtSctiesRegd>
    <ffd:MaxOfferingPricPerScty
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_038"
      unitRef="USD">11.50</ffd:MaxOfferingPricPerScty>
    <ffd:MaxAggtOfferingPric
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_039"
      unitRef="USD">17633341.00</ffd:MaxAggtOfferingPric>
    <ffd:FeeRate
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_040"
      unitRef="pure">0.0001531</ffd:FeeRate>
    <ffd:FeeAmt
      contextRef="c_offering_4"
      decimals="INF"
      id="fee_041"
      unitRef="USD">2700.00</ffd:FeeAmt>
    <ffd:TtlOfferingAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_042"
      unitRef="USD">63633341.00</ffd:TtlOfferingAmt>
    <ffd:TtlFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_043"
      unitRef="USD">9743.00</ffd:TtlFeeAmt>
    <ffd:TtlPrevslyPdAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_044"
      unitRef="USD">0.00</ffd:TtlPrevslyPdAmt>
    <ffd:TtlOffsetAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_045"
      unitRef="USD">0.00</ffd:TtlOffsetAmt>
    <ffd:NetFeeAmt
      contextRef="c_report"
      decimals="INF"
      id="fee_046"
      unitRef="USD">9743.00</ffd:NetFeeAmt>
    <ffd:OfferingNote contextRef="c_offering_1" id="fee_047">Estimated solely for the purpose of calculating the registration fee.&lt;br/&gt;&lt;br/&gt;Represents only the additional number of securities being registered. Does not include the securities that the Registrant previously registered on the Registration Statement on Form S-1 (File No. 333- 288651).&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions&lt;br/&gt;&lt;br/&gt;The Registrant previously registered securities having a proposed maximum aggregate offering price of $318,166,670.50 on its Registration Statement on Form S-1, as amended (File No. 333-288651), which was declared effective by the Securities and Exchange Commission on September 9, 2025. In accordance with Rule 462(b) under the Securities Act, an additional number of securities having a proposed maximum offering price of $63,633,341 is hereby registered, which includes securities issuable upon the exercise of the underwriters&#x2019; over-allotment option.&lt;br/&gt;&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_2" id="fee_048">Estimated solely for the purpose of calculating the registration fee.&lt;br/&gt;&lt;br/&gt;Represents only the additional number of securities being registered. Does not include the securities that the Registrant previously registered on the Registration Statement on Form S-1 (File No. 333- 288651).&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions&lt;br/&gt;&lt;br/&gt;No fee pursuant to Rule 457(g).&lt;br/&gt;&lt;br/&gt;The Registrant previously registered securities having a proposed maximum aggregate offering price of $318,166,670.50 on its Registration Statement on Form S-1, as amended (File No. 333-288651), which was declared effective by the Securities and Exchange Commission on September 9, 2025. In accordance with Rule 462(b) under the Securities Act, an additional number of securities having a proposed maximum offering price of $63,633,341 is hereby registered, which includes securities issuable upon the exercise of the underwriters&#x2019; over-allotment option.&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_3" id="fee_049">Estimated solely for the purpose of calculating the registration fee.&lt;br/&gt;&lt;br/&gt;Represents only the additional number of securities being registered. Does not include the securities that the Registrant previously registered on the Registration Statement on Form S-1 (File No. 333- 288651).&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions&lt;br/&gt;&lt;br/&gt;No fee pursuant to Rule 457(g).&lt;br/&gt;&lt;br/&gt;The Registrant previously registered securities having a proposed maximum aggregate offering price of $318,166,670.50 on its Registration Statement on Form S-1, as amended (File No. 333-288651), which was declared effective by the Securities and Exchange Commission on September 9, 2025. In accordance with Rule 462(b) under the Securities Act, an additional number of securities having a proposed maximum offering price of $63,633,341 is hereby registered, which includes securities issuable upon the exercise of the underwriters&#x2019; over-allotment option.&lt;br/&gt;</ffd:OfferingNote>
    <ffd:OfferingNote contextRef="c_offering_4" id="fee_050">Estimated solely for the purpose of calculating the registration fee.&lt;br/&gt;&lt;br/&gt;Represents only the additional number of securities being registered. Does not include the securities that the Registrant previously registered on the Registration Statement on Form S-1 (File No. 333- 288651).&lt;br/&gt;&lt;br/&gt;Pursuant to Rule 416, there are also being registered an indeterminable number of additional securities as may be issued to prevent dilution resulting from stock splits, stock dividends or similar transactions&lt;br/&gt;&lt;br/&gt;The Registrant previously registered securities having a proposed maximum aggregate offering price of $318,166,670.50 on its Registration Statement on Form S-1, as amended (File No. 333-288651), which was declared effective by the Securities and Exchange Commission on September 9, 2025. In accordance with Rule 462(b) under the Securities Act, an additional number of securities having a proposed maximum offering price of $63,633,341 is hereby registered, which includes securities issuable upon the exercise of the underwriters&#x2019; over-allotment option.</ffd:OfferingNote>
</xbrl>
