v3.26.1
DERIVATIVE FINANCIAL INSTRUMENTS - Hedging Instruments (Details) - USD ($)
$ in Millions
Jun. 30, 2026
Dec. 31, 2025
Derivatives, Fair Value [Line Items]    
Notional Value $ 111,887 $ 103,047
Asset derivatives included in accrued income and other assets    
Total contracts 559 507
Liability derivatives included in accrued expenses and other liabilities    
Total contracts 978 519
Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 43,624 44,024
Derivatives designated as Hedging Instruments | Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 43,596 43,996
Asset derivatives included in accrued income and other assets    
Interest rate contracts designated as hedging instruments 44 109
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts designated as hedging instruments 207 28
Derivatives designated as Hedging Instruments | Foreign exchange contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 273 809
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 5 0
Derivatives not designated as Hedging Instruments | Interest rate contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 57,916 49,284
Asset derivatives included in accrued income and other assets    
Interest rate contracts not designated as hedging instruments 314 260
Liability derivatives included in accrued expenses and other liabilities    
Interest rate contracts not designated as hedging instruments 625 389
Derivatives not designated as Hedging Instruments | Foreign exchange contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 7,956 7,085
Asset derivatives included in accrued income and other assets    
Foreign exchange contracts not designated as hedging instruments 98 58
Liability derivatives included in accrued expenses and other liabilities    
Foreign exchange contracts not designated as hedging instruments 76 60
Derivatives not designated as Hedging Instruments | Equity contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 878 912
Asset derivatives included in accrued income and other assets    
Commodities contracts not designated as hedging instruments 36 33
Liability derivatives included in accrued expenses and other liabilities    
Commodities contracts not designated as hedging instruments 3 5
Derivatives not designated as Hedging Instruments | Commodities contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 1,175 822
Asset derivatives included in accrued income and other assets    
Derivative instruments not designated as hedging instruments, asset 64 40
Liability derivatives included in accrued expenses and other liabilities    
Derivative credit and equity contracts not designated as hedging instruments, liability 62 37
Derivatives not designated as Hedging Instruments | Credit contracts    
Derivatives, Fair Value [Line Items]    
Notional Value 93 139
Asset derivatives included in accrued income and other assets    
Derivative instruments not designated as hedging instruments, asset 3 3
Liability derivatives included in accrued expenses and other liabilities    
Derivative credit and equity contracts not designated as hedging instruments, liability $ 0 $ 0