DERIVATIVES - Amounts Recorded in Balance Sheet (Details) - USD ($) $ in Millions |
Mar. 31, 2026 |
Dec. 31, 2025 |
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| Closed Portfolios | ||
| Derivative [Line Items] | ||
| Amortized cost | $ 4,900 | $ 5,100 |
| Cumulative basis adjustment | (4) | 17 |
| Prepayable Fixed-Rate Afs Securities Portfolio | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged assets | 3,800 | 3,800 |
| Total debt securities available for sale, at fair value | ||
| Derivative [Line Items] | ||
| Carrying amount of hedged assets | 7,050 | 8,009 |
| Cumulative amount of fair value hedging adjustments included in the carrying amount of the hedged items | $ 8 | $ 48 |
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- Definition Debt Securities, Available-for-Sale, Cumulative Basis Adjustment No definition available.
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- Definition Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition Amount of asset hedged in fair value hedging relationship. Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition Amount of cumulative increase (decrease) in fair value of hedged asset in fair value hedge, attributable to hedged risk. Excludes cumulative basis adjustment related to foreign exchange risk. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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