    <SEC-DOCUMENT>0001213900-25-097397-index.html : 20251008
    <SEC-HEADER>0001213900-25-097397.hdr.sgml : 20251008
    <ACCEPTANCE-DATETIME>20251008160654
    ACCESSION NUMBER:		0001213900-25-097397
    CONFORMED SUBMISSION TYPE:	424B2
    PUBLIC DOCUMENT COUNT:		20
    FILED AS OF DATE:		20251008
    DATE AS OF CHANGE:		20251008

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			Blackstone Secured Lending Fund
    		CENTRAL INDEX KEY:			0001736035
    		ORGANIZATION NAME:
    		EIN:				000000000
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		424B2
    		SEC ACT:		1933 Act
    		SEC FILE NUMBER:	333-288640
    		FILM NUMBER:		251382390

    	BUSINESS ADDRESS:
    		STREET 1:		345 PARK AVENUE
    		STREET 2:		31ST FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10154
    		BUSINESS PHONE:		212-503-2100

    	MAIL ADDRESS:
    		STREET 1:		345 PARK AVENUE
    		STREET 2:		31ST FLOOR
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10154

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	Blackstone / GSO Secured Lending Fund
    		DATE OF NAME CHANGE:	20180329
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>424B2
    <SEQUENCE>1
    <FILENAME>ea0259267-02_424b2.htm
    <DESCRIPTION>424B2
    <TEXT>
    Document 1 - file: ea0259267-02_424b2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-FILING FEES
    <SEQUENCE>2
    <FILENAME>ea0259267-02_exfilingfees.htm
    <DESCRIPTION>EX-FILING FEES
    <TEXT>
    Document 2 - file: ea0259267-02_exfilingfees.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>bxsl-20250711.xsd
    <DESCRIPTION>XBRL SCHEMA FILE
    <TEXT>
    Document 3 - file: bxsl-20250711.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>4
    <FILENAME>bxsl-20250711_def.xml
    <DESCRIPTION>XBRL DEFINITION FILE
    <TEXT>
    Document 4 - file: bxsl-20250711_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>5
    <FILENAME>bxsl-20250711_lab.xml
    <DESCRIPTION>XBRL LABEL FILE
    <TEXT>
    Document 5 - file: bxsl-20250711_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>6
    <FILENAME>bxsl-20250711_pre.xml
    <DESCRIPTION>XBRL PRESENTATION FILE
    <TEXT>
    Document 6 - file: bxsl-20250711_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>8
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 8 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>9
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 9 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>11
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 11 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>12
    <FILENAME>R4.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 12 - file: R4.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>R5.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 13 - file: R5.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 14 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>15
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 15 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>18
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 18 - file: FilingSummary.html

    Document 18 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>20
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 20 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>21
    <FILENAME>0001213900-25-097397-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 21 - file: 0001213900-25-097397-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>22
    <FILENAME>ea0259267-02_424b2_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 22 - file: ea0259267-02_424b2_htm.html

    Document 22 - RAW XML: ea0259267-02_424b2_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>23
    <FILENAME>ea0259267-02_exfilingfees_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 23 - file: ea0259267-02_exfilingfees_htm.html

    Document 23 - RAW XML: ea0259267-02_exfilingfees_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>