CONDENSED CONSOLIDATED STATEMENTS OF INCOME (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Income Statement [Abstract]
Revenue from Contract with Customer, Product and Service [Extensible Enumeration]	Health Care [Member]	Health Care [Member]	Health Care [Member]	Health Care [Member]
Revenues:
Premiums	$ 25,099	$ 21,468	$ 76,144	$ 66,437
Services	1,016	1,159	2,993	3,772
Investment income	308	172	775	222
Total revenues	26,423	22,799	79,912	70,431
Operating expenses:
Benefits	21,745	18,384	65,612	57,108
Operating costs	3,271	3,061	9,361	9,120
Depreciation and amortization	201	182	578	527
Total operating expenses	25,217	21,627	75,551	66,755
Income (loss) from operations	1,206	1,172	4,361	3,676
Gain on sale of Gentiva Hospice	0	(240)	0	(240)
Interest expense	114	102	347	293
Other (income) expense, net	(6)	13	40	(16)
Income (loss) before income taxes and equity in net losses	1,098	1,297	3,974	3,639
Provision for income taxes	256	107	911	820
Equity in net (losses) earnings	(12)	3	(39)	1
Net income	830	1,193	3,024	2,820
Net loss attributable to noncontrolling interests	2	2	6	1
Net income attributable to Humana	$ 832	$ 1,195	$ 3,030	$ 2,821
Basic earnings per common share (in dollars per share)	$ 6.74	$ 9.45	$ 24.37	$ 22.27
Diluted earnings per common share (in dollars per share)	$ 6.71	$ 9.39	$ 24.26	$ 22.16