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    <ACCEPTANCE-DATETIME>20240904210201
    ACCESSION NUMBER:		0001193125-24-213405
    CONFORMED SUBMISSION TYPE:	N-CSRS
    PUBLIC DOCUMENT COUNT:		18
    CONFORMED PERIOD OF REPORT:	20240630
    FILED AS OF DATE:		20240905
    DATE AS OF CHANGE:		20240904
    EFFECTIVENESS DATE:		20240905

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BLACKROCK FLOATING RATE INCOME TRUST
    		CENTRAL INDEX KEY:			0001287480
    		ORGANIZATION NAME:
    		IRS NUMBER:				000000000

    	FILING VALUES:
    		FORM TYPE:		N-CSRS
    		SEC ACT:		1940 Act
    		SEC FILE NUMBER:	811-21566
    		FILM NUMBER:		241279590

    	BUSINESS ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809-3700
    		BUSINESS PHONE:		(800) 882-0052

    	MAIL ADDRESS:
    		STREET 1:		100 BELLEVUE PARKWAY
    		CITY:			WILMINGTON
    		STATE:			DE
    		ZIP:			19809-3700

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK GLOBAL FLOATING RATE INCOME TRUST
    		DATE OF NAME CHANGE:	20040528

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	BLACKROCK VARIABLE RATE & INFLATION PROTECTED SECURITIES
    		DATE OF NAME CHANGE:	20040416
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    <TYPE>N-CSRS
    <SEQUENCE>1
    <FILENAME>d883165dncsrs.htm
    <DESCRIPTION>BLACKROCK FLOATING RATE INCOME TRUST
    <TEXT>
    Document 1 - file: d883165dncsrs.htm

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    <DOCUMENT>
    <TYPE>EX-99.CERT
    <SEQUENCE>2
    <FILENAME>d883165dex99cert.htm
    <DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 302
    <TEXT>
    Document 2 - file: d883165dex99cert.htm

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    <SEQUENCE>3
    <FILENAME>d883165dex99906cert.htm
    <DESCRIPTION>CERTIFICATIONS PURSUANT TO SECTION 906
    <TEXT>
    Document 3 - file: d883165dex99906cert.htm

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    <TYPE>EX-101.SCH
    <SEQUENCE>4
    <FILENAME>cik0001287480-20240630.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
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    <FILENAME>cik0001287480-20240630_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
    <TEXT>
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    <SEQUENCE>6
    <FILENAME>cik0001287480-20240630_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
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    <TYPE>EX-101.PRE
    <SEQUENCE>7
    <FILENAME>cik0001287480-20240630_pre.xml
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    <DESCRIPTION>GRAPHIC
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    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>12
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>13
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>14
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>16
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    Document 16 - RAW XML: FilingSummary.xml

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    <TYPE>JSON
    <SEQUENCE>19
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <TYPE>ZIP
    <SEQUENCE>20
    <FILENAME>0001193125-24-213405-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>d883165dncsrs_htm.xml
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