EQUITY METHOD INVESTMENT - Summarized Balance Sheets and Statements of Income (Details) - USD ($) $ in Millions	5 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Balance sheet
Current assets	$ 26,183	$ 26,183	$ 24,893
Current liabilities	17,178	17,178	15,331
Shareholders' equity	15,311	15,311	16,080
Income Statement Related Disclosures [Abstract]
Revenues		92,870	83,064	$ 77,155
Net income attributable to Humana		2,806	$ 2,933	$ 3,367
Kindred at Home
Balance sheet
Current assets	297	297
Non-current assets	3,577	3,577
Current liabilities	269	269
Non-current liabilities	2,219	2,219
Shareholders' equity	1,386	$ 1,386
Income Statement Related Disclosures [Abstract]
Revenues	654
Expenses	652
Net income attributable to Humana	$ 2