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DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES (Derivative Gain (Loss) Recognized/Reclassified) (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Amount of gain (loss) reclassified from AOCI into income | $ (15) | $ (23) | $ (34) | $ (48)
Loss to be reclassified within the next 12 months into interest income |  |  | 45 | 88
Deferred losses | 60 |  | 60 |
Derivatives designated as hedging instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Effective portion of derivative gain (loss) deferred in AOCI | 2 | 0 | 8 | (1)
Amount of gain (loss) reclassified from AOCI into income | (18) | (31) | (37) | (65)
Interest on fair value hedges | 12 | 22 | 22 | 43
Derivatives designated as hedging instruments: | Cash Flow Hedging |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Terminated or redesignated, unamortized basis adjustments, debt | 36 | 43 | 36 | 43
Terminated or redesignated, unamortized basis adjustments, assets | 3 | 3 | 3 | 3
Derivatives designated as hedging instruments: | Cash Flow Hedging | Hedges of floating-rate assets |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Effective portion of derivative gain (loss) deferred in AOCI | 2 | (1) | 8 | (6)
Amount of gain (loss) reclassified from AOCI into income | (18) | (33) | (38) | (69)
Interest on fair value hedges | 0 | 0 | 0 | 0
Derivatives designated as hedging instruments: | Cash Flow Hedging | Hedges of floating-rate liabilities |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Effective portion of derivative gain (loss) deferred in AOCI | 0 | 1 | 0 | 5
Amount of gain (loss) reclassified from AOCI into income | 0 | 2 | 1 | 4
Interest on fair value hedges | 0 | 0 | 0 | 0
Derivatives designated as hedging instruments: | Fair Value Hedging | Hedges of fixed-rate assets |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Effective portion of derivative gain (loss) deferred in AOCI | 0 | 0 | 0 | 0
Amount of gain (loss) reclassified from AOCI into income | 0 | 0 | 0 | 0
Interest on fair value hedges | 14 | 24 | (5) | 46
Derivatives designated as hedging instruments: | Fair Value Hedging | Hedges of fixed-rate liabilities |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Effective portion of derivative gain (loss) deferred in AOCI | 0 | 0 | 0 | 0
Amount of gain (loss) reclassified from AOCI into income | 0 | 0 | 0 | 0
Interest on fair value hedges | $ (2) | $ (2) | $ 27 | $ (3)

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- Definition Amount, after tax, of accumulated gain (loss) on derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 220 -SubTopic 10 -Name Accounting Standards Codification -Section 45 -Paragraph 11 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482790/220-10-45-11 + Details
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