GOODWILL AND OTHER INTANGIBLE ASSETS - Other Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Other intangible assets:
Weighted average life (in years)	9 years 2 months 12 days
Total other intangible assets, cost	$ 2,594	$ 3,443
Amortizable intangible assets, accumulated amortization	838	804
Total other intangible assets, net	1,756	2,639
Disposal Group, Held-for-sale, Not Discontinued Operations
Other intangible assets:
Amortizable intangible assets, cost	867	0
Amortizable intangible assets, accumulated amortization	1	0
Amortizable intangible assets, net	866	0
Certificates of need
Other intangible assets:
Indefinite-lived intangible assets	1,765	1,771
Medicare licenses
Other intangible assets:
Indefinite-lived intangible assets	$ 514	522
Customer contracts/ relationships
Other intangible assets:
Weighted average life (in years)	9 years 4 months 24 days
Amortizable intangible assets, cost	$ 912	883
Amortizable intangible assets, accumulated amortization	647	620
Amortizable intangible assets, net	$ 265	263
Trade names and technology
Other intangible assets:
Weighted average life (in years)	7 years
Amortizable intangible assets, cost	$ 159	160
Amortizable intangible assets, accumulated amortization	102	97
Amortizable intangible assets, net	$ 57	63
Provider contracts
Other intangible assets:
Weighted average life (in years)	11 years 7 months 6 days
Amortizable intangible assets, cost	$ 72	72
Amortizable intangible assets, accumulated amortization	60	57
Amortizable intangible assets, net	$ 12	15
Noncompetes and other
Other intangible assets:
Weighted average life (in years)	6 years 8 months 12 days
Amortizable intangible assets, cost	$ 39	35
Amortizable intangible assets, accumulated amortization	30	30
Amortizable intangible assets, net	$ 9	$ 5