v3.25.4
Revenue From Contracts With Customers (Disaggregation of Revenue ) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [1],[2] $ 2,440 $ 1,977 $ 1,557
United States [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [1] 1,482 1,230 968
International [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [1] 958 747 589
Commissions [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [2] 2,149 1,697 1,360
Market Data Fees [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [2] 79 71 70
Risk Exposure Fees [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [2] 80 100 46
Payments For Order Flow [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [2] 51 45 31
FDIC Sweep Fees [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [2] 37 28 19
Others [Member]      
Disaggregation of Revenue [Line Items]      
Revenue from Contract with Customer, Excluding Assessed Tax [2] $ 44 $ 36 $ 31
[1] Based on the location of the subsidiaries in which the revenues are recorded.
[2] Reported in “Other fees and services” in the consolidated statements of comprehensive income