<?xml version="1.0" encoding="utf-8"?>
<xbrl
  xmlns="http://www.xbrl.org/2003/instance"
  xmlns:bgb="http://blackstone.com/20260630"
  xmlns:cef="http://xbrl.sec.gov/cef/2026"
  xmlns:dei="http://xbrl.sec.gov/dei/2026"
  xmlns:iso4217="http://www.xbrl.org/2003/iso4217"
  xmlns:link="http://www.xbrl.org/2003/linkbase"
  xmlns:us-gaap="http://fasb.org/us-gaap/2026"
  xmlns:xbrldi="http://xbrl.org/2006/xbrldi"
  xmlns:xlink="http://www.w3.org/1999/xlink">
    <link:schemaRef xlink:href="bgb-20260630.xsd" xlink:type="simple"/>
    <context id="From2026-01-01to2026-06-30">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001546429</identifier>
        </entity>
        <period>
            <startDate>2026-01-01</startDate>
            <endDate>2026-06-30</endDate>
        </period>
    </context>
    <context id="From2026-01-012026-06-30_custom_CommonSharesMember">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001546429</identifier>
            <segment>
                <xbrldi:explicitMember dimension="us-gaap:StatementClassOfStockAxis">bgb:CommonSharesMember</xbrldi:explicitMember>
            </segment>
        </entity>
        <period>
            <startDate>2026-01-01</startDate>
            <endDate>2026-06-30</endDate>
        </period>
    </context>
    <context id="AsOf2026-06-30">
        <entity>
            <identifier scheme="http://www.sec.gov/CIK">0001546429</identifier>
        </entity>
        <period>
            <instant>2026-06-30</instant>
        </period>
    </context>
    <unit id="Shares">
        <measure>shares</measure>
    </unit>
    <unit id="USDPShares">
        <divide>
            <unitNumerator>
                <measure>iso4217:USD</measure>
            </unitNumerator>
            <unitDenominator>
                <measure>shares</measure>
            </unitDenominator>
        </divide>
    </unit>
    <dei:AmendmentFlag contextRef="From2026-01-01to2026-06-30" id="Fact000003">false</dei:AmendmentFlag>
    <dei:EntityInvCompanyType contextRef="From2026-01-01to2026-06-30" id="Fact000004">N-2</dei:EntityInvCompanyType>
    <dei:EntityCentralIndexKey contextRef="From2026-01-01to2026-06-30" id="Fact000005">0001546429</dei:EntityCentralIndexKey>
    <dei:DocumentType contextRef="From2026-01-01to2026-06-30" id="xdx2ixbrl0011">N-CSRS</dei:DocumentType>
    <dei:EntityRegistrantName contextRef="From2026-01-01to2026-06-30" id="Fact000012">Blackstone Strategic Credit 2027 Term Fund</dei:EntityRegistrantName>
    <dei:DocumentPeriodEndDate contextRef="From2026-01-01to2026-06-30" id="Fact000013">2026-06-30</dei:DocumentPeriodEndDate>
    <cef:OutstandingSecurityTitleTextBlock
      contextRef="From2026-01-012026-06-30_custom_CommonSharesMember"
      id="Fact000014">COMMON SHARES</cef:OutstandingSecurityTitleTextBlock>
    <cef:OutstandingSecurityAuthorizedShares
      contextRef="From2026-01-012026-06-30_custom_CommonSharesMember"
      decimals="INF"
      id="Fact000015"
      unitRef="Shares">44678740</cef:OutstandingSecurityAuthorizedShares>
    <us-gaap:NetAssetValuePerShare
      contextRef="AsOf2026-06-30"
      decimals="INF"
      id="Fact000016"
      unitRef="USDPShares">11.74</us-gaap:NetAssetValuePerShare>
    <us-gaap:SharePrice
      contextRef="AsOf2026-06-30"
      decimals="INF"
      id="Fact000017"
      unitRef="USDPShares">11.30</us-gaap:SharePrice>
    <cef:InvestmentObjectivesAndPracticesTextBlock contextRef="From2026-01-01to2026-06-30" id="Fact000018">&lt;p id="xdx_A8A_ecef--InvestmentObjectivesAndPracticesTextBlock_zseFvn29zzAg" style="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;BGB&#x2019;s primary investment objective is to seek
high current income, with a secondary objective to seek preservation of capital, consistent with its primary goal of high current income.
BGB will seek to achieve its investment objectives by investing primarily in a diversified portfolio of loans and other fixed income instruments
of predominantly U.S. corporate issuers, including first- and second-lien secured loans (&#x201c;Senior Secured Loans&#x201d;) and high
yield corporate bonds of varying maturities. Under normal market conditions, at least 80% of BGB&#x2019;s Managed Assets (defined in Note
3) will be invested in credit investments comprised of corporate fixed income instruments and other investments (including derivatives)
with similar economic characteristics.&lt;/p&gt;

&lt;p style="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;&#160;&lt;/p&gt;

&lt;p style="font: 11pt Times New Roman, Times, Serif; margin: 0; text-align: justify"&gt;Senior Loans, Secured Loans and Senior Secured Loans are referred to collectively
as &#x201c;Loans&#x201d; throughout the Notes to Financial Statements.&lt;/p&gt;

</cef:InvestmentObjectivesAndPracticesTextBlock>
</xbrl>
