GOODWILL AND OTHER INTANGIBLE ASSETS - Details of Intangible Assets Included in Other Long-Term Assets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Other intangible assets:
Weighted average life (in years)	9 years 2 months 12 days
Total other intangible assets, cost	$ 2,626	$ 2,648
Amortizable intangible assets, accumulated amortization	933	883
Total other intangible assets, net	1,693	1,765
Certificates of need
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	1,092	1,132
Medicare licenses
Indefinite-Lived Intangible Assets [Line Items]
Indefinite-lived intangible assets	$ 288	286
Customer contracts/relationships
Other intangible assets:
Weighted average life (in years)	9 years 4 months 24 days
Amortizable intangible assets, cost	$ 956	929
Amortizable intangible assets, accumulated amortization	718	673
Amortizable intangible assets, net	$ 238	256
Trade names and technology
Other intangible assets:
Weighted average life (in years)	6 years 8 months 12 days
Amortizable intangible assets, cost	$ 139	142
Amortizable intangible assets, accumulated amortization	109	107
Amortizable intangible assets, net	$ 30	35
Provider contracts
Other intangible assets:
Weighted average life (in years)	11 years 10 months 24 days
Amortizable intangible assets, cost	$ 67	73
Amortizable intangible assets, accumulated amortization	62	63
Amortizable intangible assets, net	$ 5	10
Noncompetes and other
Other intangible assets:
Weighted average life (in years)	8 years 4 months 24 days
Amortizable intangible assets, cost	$ 84	86
Amortizable intangible assets, accumulated amortization	44	40
Amortizable intangible assets, net	$ 40	$ 46