v3.26.1
Revenue Recognition - Disaggregation of Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2026
Mar. 31, 2025
Disaggregation of Revenue [Line Items]    
Cash and cash equivalents $ 288 $ 328
Cash and investments segregated 397 412
Receivables from brokerage clients 1,499 1,379
Available for sale securities 326 433
Held to maturity securities 567 622
Bank loans 627 493
Securities lending revenue 91 60
Other interest revenue 167 30
Interest revenue 3,962 3,757
Bank deposits (118) (436)
Payables to brokers, dealers, and clearing organizations (217) (137)
Payables to brokerage clients (56) (49)
Other short-term borrowings (92) (82)
Federal Home Loan Bank borrowings (12) (133)
Long-term debt (201) (212)
Other interest expense (122) (2)
Interest expense (818) (1,051)
Net interest revenue 3,144 2,706
Total net revenues 6,482 5,599
Asset management and administration fees    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 1,759 1,530
Mutual funds, ETFs, CTFs, and alternatives    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 991 878
Managed investing solutions    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 674 569
Other    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 94 83
Trading revenue    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 1,089 908
Commissions    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 489 431
Order flow revenue    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 560 443
Principal transactions    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 40 34
Bank deposit account fees    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers 295 245
Other    
Disaggregation of Revenue [Line Items]    
Revenues from contracts with customers $ 195 $ 210