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INVESTMENT SECURITIES - Narrative (Details) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2022 USD ($) position | Dec. 31, 2021 USD ($)
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Book value | $ 15,946 | $ 13,440
Fair Value | $ 14,254 | $ 13,497
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 | 1,625 |
Securities, number of positions | position | 1,710 |
Standard & Poor's, AA- Rating |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Percentage of debt securities considered to be of investment-grade (percent) | 96.00% |
Disposed of by sale | Kindred at Home, Hospice and Personal Care Divisions |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Book value | $ 280 |
Fair Value | $ 278 |

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