Quarterly report [Sections 13 or 15(d)]

DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details)

v3.25.2
DERIVATIVE FINANCIAL INSTRUMENTS - Asset and Liability Management (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Notional Disclosures [Abstract]          
Notional Value $ 46,166   $ 46,166   $ 45,809
Increase (decrease) to net interest income due to derivative adjustment (7) $ (70) (25) $ (138)  
Not Designated as Hedging Instrument, Economic Hedge          
Notional Disclosures [Abstract]          
Notional Value 175   175   175
Fair Value Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value 19,741   19,741   22,334
Cash Flow Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value 26,250   26,250   23,300
Investment securities          
Notional Disclosures [Abstract]          
Notional Value 9,142   9,142   10,987
Investment securities | Not Designated as Hedging Instrument, Economic Hedge          
Notional Disclosures [Abstract]          
Notional Value 0   0   0
Investment securities | Fair Value Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value 9,142   9,142   10,987
Investment securities | Cash Flow Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value 0   0   0
Loans          
Notional Disclosures [Abstract]          
Notional Value 26,425   26,425   23,475
Loans | Not Designated as Hedging Instrument, Economic Hedge          
Notional Disclosures [Abstract]          
Notional Value 175   175   175
Loans | Fair Value Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value 0   0   0
Loans | Cash Flow Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value 26,250   26,250   23,300
Long-term debt          
Notional Disclosures [Abstract]          
Notional Value 10,599   10,599   11,347
Long-term debt | Not Designated as Hedging Instrument, Economic Hedge          
Notional Disclosures [Abstract]          
Notional Value 0   0   0
Long-term debt | Fair Value Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value 10,599   10,599   11,347
Long-term debt | Cash Flow Hedges | Derivatives designated as Hedging Instruments          
Notional Disclosures [Abstract]          
Notional Value $ 0   $ 0   $ 0