v3.26.3
DERIVATIVE FINANCIAL INSTRUMENTS - Hedging Instruments (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Notional Value $ 109,612 $ 103,047
Asset derivatives included in accrued income and other assets    
Total contracts 1,244 507
Liability derivatives included in accrued expenses and other liabilities    
Total contracts 1,597 519
Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 41,874 44,024
Derivatives designated as Hedging Instruments | Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 41,846 43,996
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments 0 109
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts designated as hedging instruments 468 28
Derivatives designated as Hedging Instruments | Foreign exchange contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 280 809
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments 0 4
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts designated as hedging instruments 9 0
Derivatives not designated as Hedging Instruments | Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 56,178 49,284
Asset derivatives included in accrued income and other assets    
Interest rate contracts not designated as hedging instruments 1,050 260
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts not designated as hedging instruments 982 389
Derivatives not designated as Hedging Instruments | Foreign exchange contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 9,079 7,085
Asset derivatives included in accrued income and other assets    
Foreign exchange contracts not designated as hedging instruments 107 58
Liability derivatives included in accrued expenses and other liabilities    
Foreign exchange contracts not designated as hedging instruments 72 60
Derivatives not designated as Hedging Instruments | Equity contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 866 912
Asset derivatives included in accrued income and other assets    
Commodities contracts not designated as hedging instruments 18 33
Liability derivatives included in accrued expenses and other liabilities    
Commodities contracts not designated as hedging instruments 2 5
Derivatives not designated as Hedging Instruments | Commodities contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 1,288 822
Asset derivatives included in accrued income and other assets    
Derivative instruments not designated as hedging instruments, asset 67 40
Liability derivatives included in accrued expenses and other liabilities    
Derivative credit and equity contracts not designated as hedging instruments, liability 64 37
Derivatives not designated as Hedging Instruments | Credit contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 75 139
Asset derivatives included in accrued income and other assets    
Derivative instruments not designated as hedging instruments, asset 2 3
Liability derivatives included in accrued expenses and other liabilities    
Derivative credit and equity contracts not designated as hedging instruments, liability $ 0 $ 0