v3.25.4
Fair Value Hierarchy - Fair Value Option, Additional Information (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
Dec. 31, 2024
USD ($)
yr
Other Financial Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net realized and unrealized gains/(losses) on liabilities $ (1,990) $ 505
Net realized gains/(losses) (303) (210)
Net unrealized gains/(losses) (1,684) 715
Net realized gains/(losses) included in earnings (303) (210)
Other Financial Liabilities | Debt valuation adjustment    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net realized gains/(losses) included in comprehensive income (202) 57
Other Financial Liabilities | Market making    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net realized gains/(losses) included in earnings (1,670) 491
Other Financial Liabilities | Other principal transactions    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net realized gains/(losses) included in earnings (116) (42)
Other Financial Liabilities | Interest expense    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net realized gains/(losses) included in earnings (2) (1)
Other secured financings | Other Financial Liabilities    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Net unrealized gains/(losses) (28) 12
Net realized gains/(losses) included in earnings $ 2 $ (1)
Minimum | Level 3 | Other secured financings | Yield    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 0.022 0.038
Minimum | Level 3 | Other secured financings | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 0.064  
Minimum | Level 3 | Other secured financings | Duration (years)    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 2.7 2.0
Maximum | Level 3 | Other secured financings | Yield    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 0.142 0.123
Maximum | Level 3 | Other secured financings | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 0.073  
Maximum | Level 3 | Other secured financings | Duration (years)    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 3.6 5.4
Weighted Average | Level 3 | Other secured financings | Yield    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 0.100 0.089
Weighted Average | Level 3 | Other secured financings | Volatility    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 0.073  
Weighted Average | Level 3 | Other secured financings | Duration (years)    
Fair Value, Assets and Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]    
Other secured financing measurement input 3.2 2.9