GOODWILL AND OTHER INTANGIBLE ASSETS - Schedule of Other Intangible Assets Included in Other Long-Term Assets (Details) - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Other intangible assets:
Weighted Average Life (in years)	8 years 6 months
Total other intangible assets, Gross Carrying Amount	$ 2,133	$ 2,436
Amortizable intangible assets, Accumulated Amortization	903	993
Total other intangible assets, Net	1,230	1,443
Certificates of need
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	878	910
Medicare licenses
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 270	270
Customer contracts/relationships
Other intangible assets:
Weighted Average Life (in years)	8 years 7 months 6 days
Amortizable intangible assets, Gross Carrying Amount	$ 732	965
Amortizable intangible assets, Accumulated Amortization	686	759
Amortizable intangible assets, Net	$ 46	206
Trade names and technology
Other intangible assets:
Weighted Average Life (in years)	6 years 1 month 6 days
Amortizable intangible assets, Gross Carrying Amount	$ 101	139
Amortizable intangible assets, Accumulated Amortization	97	119
Amortizable intangible assets, Net	$ 4	20
Provider contracts
Other intangible assets:
Weighted Average Life (in years)	11 years 10 months 24 days
Amortizable intangible assets, Gross Carrying Amount	$ 67	67
Amortizable intangible assets, Accumulated Amortization	64	64
Amortizable intangible assets, Net	$ 3	3
Noncompetes and other
Other intangible assets:
Weighted Average Life (in years)	8 years 4 months 24 days
Amortizable intangible assets, Gross Carrying Amount	$ 85	85
Amortizable intangible assets, Accumulated Amortization	56	51
Amortizable intangible assets, Net	$ 29	$ 34