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FAIR VALUE - Narrative (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2024 | Dec. 31, 2023
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Swap asset | $ 20 | $ 68
Interest rate swaps |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Cumulative, aggregate adjustment | 17 |
Put option |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of financial liability | 731 | 595
Call option |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Fair value of financial asset | 22 | 18
Term Loan And Commercial Paper |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Short-term debt | 300 | 900
Carrying Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt outstanding | 13,000 | 10,800
Fair Value |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Debt outstanding | 12,600 | 10,600
Recurring Basis |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Assets, fair value disclosure | 22,671 | 21,590
Unobservable Inputs (Level 3) | Recurring Basis |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Assets, fair value disclosure | $ 226 | $ 218
Investments | Fair Value Risk | Unobservable Inputs (Level 3) |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |
Concentration risk (percent) | 1.00% | 1.00%

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