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SECURITIES - Narrative (Details) - USD ($) | 3 Months Ended |
--- | --- | ---
Mar. 31, 2025 | Mar. 31, 2024 | Dec. 31, 2024
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |  |  |
Accrued interest receivable on debt securities | $ 129,000,000 |  | $ 125,000,000
Taxable interest income from securities | $ 418,000,000 | $ 399,000,000 |
Held-to-maturity, zero expected credit loss, percent of portfolio | 95.00% |  |
Allowance for credit loss recognized | $ 0 |  |
Securities Sold under Agreements to Repurchase |  |  |
Schedule of Available-for-sale and Held-to-maturity Securities [Line Items] |  |  |
Debt securities at fair value | $ 3,600,000,000 |  | $ 4,000,000,000.0

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- Definition Fair value of investment in debt security measured at amortized cost (held-to-maturity) and investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 5A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-5A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 320 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (aa) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481800/320-10-50-2 + Details
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