v3.26.3
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Notional and Recorded Fair Values) (Details) - USD ($)
$ in Millions
Sep. 30, 2026
Dec. 31, 2025
Derivative [Line Items]    
Notional amount $ 69,698 $ 40,627
Other assets 771 360
Other liabilities 783 260
Less: Offsetting derivative instruments (122) (51)
Less: Offsetting derivative instruments (122) (51)
Less: Cash collateral pledged/received (479) (232)
Less: Cash collateral pledged/received (87) (17)
Total net derivatives presented on balance sheet 170 77
Total net derivatives presented on balance sheet 574 192
Derivatives designated as accounting hedges:    
Derivative [Line Items]    
Notional amount 33,141 11,403
Other assets 112 86
Other liabilities 26 1
Derivatives designated as accounting hedges: | Hedges of floating-rate assets | Cash Flow Hedging    
Derivative [Line Items]    
Notional amount 22,700 2,750
Other assets 0 7
Other liabilities 20 1
Derivative, notional amount, not yet effective 14,000 350
Derivatives designated as accounting hedges: | Hedges of fixed-rate assets | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 8,441 7,653
Other assets 112 79
Other liabilities 0 0
Derivative, notional amount, not yet effective 2,900 2,100
Derivatives designated as accounting hedges: | Hedges of fixed-rate liabilities | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 2,000 1,000
Other assets 0 0
Other liabilities 6 0
Derivatives not designated as hedging instruments    
Derivative [Line Items]    
Notional amount 36,557 29,224
Other assets 659 274
Other liabilities 757 259
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives    
Derivative [Line Items]    
Notional amount 30,612 22,428
Other assets 426 251
Other liabilities 542 241
Derivatives not designated as hedging instruments | Customer commodity derivatives    
Derivative [Line Items]    
Notional amount 3,466 853
Other assets 228 18
Other liabilities 213 17
Derivatives not designated as hedging instruments | Other interest rate derivatives    
Derivative [Line Items]    
Notional amount 1,928 5,571
Other assets 2 2
Other liabilities 0 0
Derivatives not designated as hedging instruments | Foreign exchange derivatives    
Derivative [Line Items]    
Notional amount 506 308
Other assets 3 3
Other liabilities 2 1
Derivatives not designated as hedging instruments | Purchased credit derivatives    
Derivative [Line Items]    
Notional amount 45 64
Other assets 0 0
Other liabilities $ 0 $ 0