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DERIVATIVES - Amounts Recorded in Balance Sheet (Details) - USD ($) $ in Millions | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Derivative [Line Items] |  |
Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items | $ (8) | $ (17)
Debt Securities |  |
Derivative [Line Items] |  |
Carrying amount of hedged assets(2) | 9,557 | 7,253
Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items | (97) | 60
Debt Securities | Closed Portfolios |  |
Derivative [Line Items] |  |
Carrying amount of hedged assets(2) | 6,400 | 5,900
Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items | (75) | 39
Amount of hedged item | 4,700 | 4,000
Long-term borrowed funds |  |
Derivative [Line Items] |  |
Carrying amount of hedged liabilities | 491 | 483
Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items | $ (8) | $ (17)

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