v3.25.2
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Notional and Recorded Fair Values) (Details) - USD ($)
$ in Millions
Jun. 30, 2025
Dec. 31, 2024
Derivative [Line Items]    
Notional amount $ 27,316 $ 24,553
Other assets 376 446
Other liabilities 274 350
Net credit valuation adjustment reducing fair value 9 9
Other assets    
Derivative [Line Items]    
Other assets 376 446
Other liabilities    
Derivative [Line Items]    
Other liabilities 274 350
Derivatives designated as hedging instruments:    
Derivative [Line Items]    
Notional amount 7,416 6,218
Derivatives designated as hedging instruments: | Other assets    
Derivative [Line Items]    
Other assets 87 93
Derivatives designated as hedging instruments: | Other liabilities    
Derivative [Line Items]    
Other liabilities 0 2
Derivatives designated as hedging instruments: | Hedges of floating-rate assets | Cash Flow Hedging    
Derivative [Line Items]    
Notional amount 750 550
Derivatives designated as hedging instruments: | Hedges of floating-rate assets | Other assets | Cash Flow Hedging    
Derivative [Line Items]    
Other assets 7 0
Derivatives designated as hedging instruments: | Hedges of floating-rate assets | Other liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Other liabilities 0 2
Derivatives designated as hedging instruments: | Hedges of floating-rate liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Notional amount 0 500
Derivatives designated as hedging instruments: | Hedges of floating-rate liabilities | Other assets | Cash Flow Hedging    
Derivative [Line Items]    
Other assets 0 0
Derivatives designated as hedging instruments: | Hedges of floating-rate liabilities | Other liabilities | Cash Flow Hedging    
Derivative [Line Items]    
Other liabilities 0 0
Derivatives designated as hedging instruments: | Hedges of fixed-rate assets | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 6,166 4,668
Derivatives designated as hedging instruments: | Hedges of fixed-rate assets | Other assets | Fair Value Hedging    
Derivative [Line Items]    
Other assets 80 93
Derivatives designated as hedging instruments: | Hedges of fixed-rate assets | Other liabilities | Fair Value Hedging    
Derivative [Line Items]    
Other liabilities 0 0
Derivatives designated as hedging instruments: | Hedges of fixed-rate liabilities | Fair Value Hedging    
Derivative [Line Items]    
Notional amount 500 500
Derivatives designated as hedging instruments: | Hedges of fixed-rate liabilities | Other assets | Fair Value Hedging    
Derivative [Line Items]    
Other assets 0 0
Derivatives designated as hedging instruments: | Hedges of fixed-rate liabilities | Other liabilities | Fair Value Hedging    
Derivative [Line Items]    
Other liabilities 0 0
Derivatives not designated as hedging instruments    
Derivative [Line Items]    
Notional amount 19,900 18,335
Derivatives not designated as hedging instruments | Other assets    
Derivative [Line Items]    
Other assets 289 353
Derivatives not designated as hedging instruments | Other liabilities    
Derivative [Line Items]    
Other liabilities 274 348
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives    
Derivative [Line Items]    
Notional amount 18,221 16,833
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives | Other assets    
Derivative [Line Items]    
Other assets 284 348
Derivatives not designated as hedging instruments | Customer-facing interest rate derivatives | Other liabilities    
Derivative [Line Items]    
Other liabilities 271 346
Derivatives not designated as hedging instruments | Other interest rate derivatives    
Derivative [Line Items]    
Notional amount 1,134 1,105
Derivatives not designated as hedging instruments | Other interest rate derivatives | Other assets    
Derivative [Line Items]    
Other assets 1 1
Derivatives not designated as hedging instruments | Other interest rate derivatives | Other liabilities    
Derivative [Line Items]    
Other liabilities 0 0
Derivatives not designated as hedging instruments | Foreign exchange derivatives    
Derivative [Line Items]    
Notional amount 466 373
Derivatives not designated as hedging instruments | Foreign exchange derivatives | Other assets    
Derivative [Line Items]    
Other assets 4 4
Derivatives not designated as hedging instruments | Foreign exchange derivatives | Other liabilities    
Derivative [Line Items]    
Other liabilities 2 2
Derivatives not designated as hedging instruments | Purchased credit derivatives    
Derivative [Line Items]    
Notional amount 79 24
Derivatives not designated as hedging instruments | Purchased credit derivatives | Other assets    
Derivative [Line Items]    
Other assets 0 0
Derivatives not designated as hedging instruments | Purchased credit derivatives | Other liabilities    
Derivative [Line Items]    
Other liabilities $ 1 $ 0