v3.26.1
Compensation - Summary of the BGC Holdings and Newmark Holdings LPUs Held by BGC Employees (Details) - LPUs - Newmark Holdings - shares
Jun. 30, 2026
Dec. 31, 2025
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Balance outstanding (in shares) 2,009,000 2,140,000
Regular Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Balance outstanding (in shares) 1,339,000  
Preferred Units    
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]    
Balance outstanding (in shares) 670,000