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FAIR VALUE - Narrative (Details) - USD ($) | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021 | Nov. 30, 2023 | Mar. 31, 2023 | Aug. 11, 2022 | Apr. 27, 2021 | Mar. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Asset value | $ 218,000,000 | $ 101,000,000 | $ 68,000,000 |  |  |  |  |
Swap asset | $ 68,000,000 |  |  |  |  |  |  |
Termination of put and call options |  |  | $ 377,000,000 |  |  |  |  |
Disposed of by sale | Gentiva Hospice |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Equity interest to be sold |  |  |  |  |  | 60.00% |  |
Fair Value Risk | Unobservable Inputs (Level 3) | Investments |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Concentration risk (percent) | 1.00% | 0.50% |  |  |  |  |  |
Put option |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Fair value of financial liability | $ 595,000,000 | $ 267,000,000 |  |  |  |  |  |
Call option |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Fair value of financial asset | 18,000,000 | 10,000,000 |  |  |  |  |  |
Other long-term liabilities | Put option |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Fair value of financial liability |  |  |  |  |  |  | $ 0 | $ 63,000,000
Other long-term assets | Call option |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Fair value of financial asset |  |  |  |  |  |  | $ 0 | $ 440,000,000
Kindred at Home |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Equity interest to be acquired per agreement (percent) |  |  |  |  |  |  | 60.00% |
Commercial Paper |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Short-term debt | 871,000,000 | 595,000,000 |  |  |  |  |  |
Term Loan and Commercial Paper |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Short-term debt |  | 1,100,000,000 |  |  |  |  |  |
Carrying Value |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Debt outstanding | 10,800,000,000 | 10,000,000,000 |  |  |  |  |  |
Fair Value |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Debt outstanding | 10,600,000,000 | $ 9,400,000,000 |  |  |  |  |  |
Interest Rate Swap Maturing 2032 | Interest Rate Swap |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Notional amount | 650,000,000 |  |  |  |  |  |  |
Interest Rate Swap Maturing 2033 | Interest Rate Swap |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Notional amount | 300,000,000 |  |  |  |  |  |  |
Interest Rate Swap Maturing 2049 | Interest Rate Swap |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Notional amount | 450,000,000 |  |  |  |  |  |  |
Interest Rate Swap Maturing 2034 | Interest Rate Swap |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Notional amount | 400,000,000 |  |  |  |  |  |  |
$750 million, 5.875% due March 1, 2033 | Senior notes |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Aggregate principal | $ 750,000,000 |  |  |  |  |  |  |
Stated interest rate (percent) | 5.875% |  |  |  |  |  |  |
$750 million, 5.500% due March 15, 2053 | Senior notes |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Aggregate principal | $ 750,000,000 |  |  |  | $ 750,000,000 |  |  |
Stated interest rate (percent) | 5.50% |  |  |  | 5.50% |  |  |
3.950 Percent Senior Notes | Senior notes |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Aggregate principal | $ 500,000,000 |  |  |  |  |  |  |
Stated interest rate (percent) | 3.95% |  |  |  |  |  |  |
$850 million, 5.950% due March 15, 2034 | Senior notes |  |  |  |  |  |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |  |
Aggregate principal | $ 850,000,000 |  |  | $ 850,000,000 |  |  |  |
Stated interest rate (percent) | 5.95% |  |  | 5.95% |  |  |  |

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