Quarterly report [Sections 13 or 15(d)]

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details)

v3.25.1
DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Dec. 31, 2024
Notional Disclosures [Abstract]      
Notional Value $ 48,629   $ 45,809
Increase (decrease) to net interest income due to derivative adjustment (18) $ (68)  
Not Designated as Hedging Instrument, Economic Hedge      
Notional Disclosures [Abstract]      
Notional Value 175   175
Fair Value Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value 22,204   22,334
Cash Flow Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value 26,250   23,300
Investment securities      
Notional Disclosures [Abstract]      
Notional Value 10,987   10,987
Investment securities | Not Designated as Hedging Instrument, Economic Hedge      
Notional Disclosures [Abstract]      
Notional Value 0   0
Investment securities | Fair Value Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value 10,987   10,987
Investment securities | Cash Flow Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value 0   0
Loans      
Notional Disclosures [Abstract]      
Notional Value 26,425   23,475
Loans | Not Designated as Hedging Instrument, Economic Hedge      
Notional Disclosures [Abstract]      
Notional Value 175   175
Loans | Fair Value Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value 0   0
Loans | Cash Flow Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value 26,250   23,300
Long-term debt      
Notional Disclosures [Abstract]      
Notional Value 11,217   11,347
Long-term debt | Not Designated as Hedging Instrument, Economic Hedge      
Notional Disclosures [Abstract]      
Notional Value 0   0
Long-term debt | Fair Value Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value 11,217   11,347
Long-term debt | Cash Flow Hedges | Derivatives designated as Hedging Instruments      
Notional Disclosures [Abstract]      
Notional Value $ 0   $ 0