    <SEC-DOCUMENT>0001628280-21-024050-index.html : 20211123
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    <ACCEPTANCE-DATETIME>20211123160134
    ACCESSION NUMBER:		0001628280-21-024050
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		23
    CONFORMED PERIOD OF REPORT:	20211122
    ITEM INFORMATION:		Departure of Directors or Certain Officers; Election of Directors; Appointment of Certain Officers: Compensatory Arrangements of Certain Officers
    ITEM INFORMATION:		Submission of Matters to a Vote of Security Holders
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20211123
    DATE AS OF CHANGE:		20211123

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			BGC Partners, Inc.
    		CENTRAL INDEX KEY:			0001094831
    		STANDARD INDUSTRIAL CLASSIFICATION:	SECURITY & COMMODITY BROKERS, DEALERS, EXCHANGES & SERVICES [6200]
    		IRS NUMBER:				134063515
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-28191
    		FILM NUMBER:		211438484

    	BUSINESS ADDRESS:
    		STREET 1:		499 PARK AVENUE
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10022
    		BUSINESS PHONE:		212-610-2200

    	MAIL ADDRESS:
    		STREET 1:		499 PARK AVENUE
    		CITY:			NEW YORK
    		STATE:			NY
    		ZIP:			10022

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	ESPEED INC
    		DATE OF NAME CHANGE:	19990913
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>bgcp-20211122.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: bgcp-20211122.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-10.1
    <SEQUENCE>2
    <FILENAME>exhibit101.htm
    <DESCRIPTION>EX-10.1
    <TEXT>
    Document 2 - file: exhibit101.htm

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    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>bgcp-20211122.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
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    <TEXT>
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    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>exhibit101001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <SEQUENCE>7
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    <DESCRIPTION>GRAPHIC
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    <SEQUENCE>8
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    <DESCRIPTION>GRAPHIC
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    <SEQUENCE>9
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    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <SEQUENCE>10
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    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <SEQUENCE>11
    <FILENAME>exhibit101006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>exhibit101007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>exhibit101008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>exhibit101009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <SEQUENCE>15
    <FILENAME>exhibit101010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>16
    <FILENAME>bgcp-20211122_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
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    <TYPE>XML
    <SEQUENCE>17
    <FILENAME>R1.htm
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    <TEXT>
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    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>18
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
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    <TYPE>XML
    <SEQUENCE>19
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    <TEXT>
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    <TYPE>XML
    <SEQUENCE>20
    <FILENAME>report.css
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    <TEXT>
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    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>21
    <FILENAME>FilingSummary.xml
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    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>23
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    <TYPE>ZIP
    <SEQUENCE>24
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