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INVESTMENT SECURITIES - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2023 USD ($) position | Dec. 31, 2022 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Book value | $ 18,302 | $ 15,946
Fair Value | $ 17,008 | 14,254
Maximum individual state general bond obligation as a percentage of total debt securities (percent) | 1.00% |
Securities in unrealized loss position, number of positions | position | 1,560 |
Securities, number of positions | position | 2,060 |
Standard & Poor's, AA- Rating |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage of debt securities considered to be of investment-grade (percent) | 97.00% |
Disposed of by sale | Gentiva Hospice |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Book value | $ 379 | 280
Fair Value | $ 398 | $ 278

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