GOODWILL AND OTHER INTANGIBLE ASSETS - Details of Intangible Assets Included in Other Long-Term Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Intangible Assets
Weighted Average Life	9 years 1 month 6 days
Total other intangible assets, cost	$ 3,443	$ 1,069
Accumulated Amortization	804	740
Total other intangible assets, net	2,639	329
Certificates of need
Intangible Assets
Indefinite-lived intangible assets	1,771	0
Medicare licenses
Intangible Assets
Indefinite-lived intangible assets	$ 522	0
Customer contracts/relationships
Intangible Assets
Weighted Average Life	9 years 4 months 24 days
Cost	$ 883	849
Accumulated Amortization	620	572
Net	$ 263	277
Trade names and technology
Intangible Assets
Weighted Average Life	7 years
Cost	$ 160	122
Accumulated Amortization	97	89
Net	$ 63	33
Provider contracts
Intangible Assets
Weighted Average Life	11 years 7 months 6 days
Cost	$ 72	69
Accumulated Amortization	57	50
Net	$ 15	19
Noncompetes and other
Intangible Assets
Weighted Average Life	6 years 9 months 18 days
Cost	$ 35	29
Accumulated Amortization	30	29
Net	$ 5	$ 0