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Document and Entity Information - USD ($)	12 Months Ended
Document and Entity Information - USD ($)	Dec. 31, 2023	Feb. 27, 2024	Jun. 30, 2023
Document Information [Line Items]
Document Type	10-K
Document Annual Report	true
Current Fiscal Year End Date	--12-31
Document Period End Date	Dec. 31, 2023
Document Transition Report	false
Entity File Number	001-35591
Entity Registrant Name	BGC Group, Inc.
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	86-3748217
Entity Address, Address Line One	499 Park Avenue
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10022
City Area Code	212
Local Phone Number	610-2200
Title of 12(b) Security	Class A Common Stock, $0.01 par value
Trading Symbol	BGC
Security Exchange Name	NASDAQ
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction [Flag]	false
Entity Shell Company	false
Entity Public Float			$ 1,486,449,921
Documents Incorporated by Reference	Portions of the registrant’s definitive proxy statement for its 2024 annual meeting of stockholders (the “2024 Proxy Statement”) are incorporated by reference in Part III of this Annual Report on Form 10‑K. We anticipate that we will file the 2024 Proxy Statement with the SEC on or before April 29, 2024.
Amendment Flag	false
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Entity Central Index Key	0001094831
Class A Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		384,393,744
Class B Common Stock
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		109,452,953