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Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 27, 2025
Jun. 30, 2024
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, 2024    
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     $ 4,622,726,641
Documents Incorporated by Reference
Portions of the registrant’s definitive proxy statement for its 2025 annual meeting of stockholders (the “2025 Proxy Statement”) are incorporated by reference in Part III of this Annual Report on Form 10‑K. We anticipate that we will file the 2025 Proxy Statement with the SEC on or before April 30, 2025.
    
Amendment Flag false    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Entity Central Index Key 0001094831    
Class A Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   373,430,578  
Class B Common Stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   109,452,953