v3.26.1
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Notional and Recorded Fair Values) (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Derivative [Line Items]    
Notional amount $ 55,067 $ 40,627
Other assets 484 360
Other liabilities 392 260
Less: Offsetting derivative instruments (70) (51)
Less: Offsetting derivative instruments (70) (51)
Less: Cash collateral pledged/received (228) (232)
Less: Cash collateral pledged/received (124) (17)
Total net derivatives presented on balance sheet 186 77
Total net derivatives presented on balance sheet 198 192
Derivatives designated as accounting hedges:    
Derivative [Line Items]    
Notional amount 25,603 11,403
Other assets 82 86
Other liabilities 5 1
Derivatives designated as accounting hedges: | Hedges of floating-rate assets | Cash Flow Hedging    
Derivative [Line Items]    
Notional amount 16,150 2,750
Other assets 3 7
Other liabilities 5 1
Derivatives designated as accounting hedges: | Hedges of fixed-rate assets | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 7,953 7,653
Other assets 79 79
Other liabilities 0 0
Derivatives designated as accounting hedges: | Hedges of fixed-rate liabilities | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 1,500 1,000
Other assets 0 0
Other liabilities 0 0
Derivatives not designated as hedging instruments    
Derivative [Line Items]    
Notional amount 29,464 29,224
Other assets 402 274
Other liabilities 387 259
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives    
Derivative [Line Items]    
Notional amount 25,103 22,428
Other assets 236 251
Other liabilities 226 241
Derivatives not designated as hedging instruments | Customer commodity derivatives    
Derivative [Line Items]    
Notional amount 2,255 853
Other assets 161 18
Other liabilities 159 17
Derivatives not designated as hedging instruments | Other interest rate derivatives    
Derivative [Line Items]    
Notional amount 1,695 5,571
Other assets 3 2
Other liabilities 1 0
Derivatives not designated as hedging instruments | Foreign exchange derivatives    
Derivative [Line Items]    
Notional amount 368 308
Other assets 2 3
Other liabilities 1 1
Derivatives not designated as hedging instruments | Purchased credit derivatives    
Derivative [Line Items]    
Notional amount 43 64
Other assets 0 0
Other liabilities $ 0 $ 0