SEGMENT AND GEOGRAPHIC INFORMATION - Schedule of Geographic Distributions of Revenues, Equity in Earnings or Losses of Affiliates, Adjusted Segment EBITDA, Depreciation and Amortization (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Revenues From Third Party Payers [Line Items]
Revenues	$ 17,339	$ 15,591
Adjusted segment EBITDA	$ 3,353	3,172
Commercial Payer [Member]
Revenues From Third Party Payers [Line Items]
Revenues		145
Adjusted segment EBITDA		$ 145