INVESTMENT SECURITIES - Narrative (Details) - USD ($) |
9 Months Ended | 12 Months Ended |
|---|---|---|
Sep. 30, 2026 |
Dec. 31, 2025 |
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| Investments, Debt and Equity Securities [Abstract] | ||
| Accrued interest on investment securities | $ 246,000,000 | $ 158,000,000 |
| Debt securities, available-for-sale, accrued interest writeoff | 0 | 0 |
| Debt securities, held-to-maturity, accrued interest, writeoff | 0 | 0 |
| Debt securities, held-to-maturity, allowance for credit loss, excluding accrued interest | 0 | 0 |
| Debt securities, available-for-sale, amortized cost, allowance for credit loss, excluding accrued interest | $ 0 | $ 0 |
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- Definition Interest, dividends, rents, ancillary and other revenues earned but not yet received by the entity on its investments. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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| X | ||||||||||
- Definition Amount of writeoff of accrued interest on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), recognized by reversing interest income. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount excluding accrued interest, of allowance for credit loss on 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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| X | ||||||||||
- Definition Amount of writeoff of accrued interest on investment in debt security measured at amortized cost (held-to-maturity) recognized by reversing interest income. Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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| X | ||||||||||
- Definition Amount, excluding accrued interest, of allowance for credit loss on investment in debt security measured at amortized cost (held-to-maturity). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- References No definition available.
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