Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Income Statement [Abstract]
Services revenue, type	Health Care [Member]	Health Care [Member]	Health Care [Member]	Health Care [Member]
Revenues:
Premiums	$ 22,266	$ 19,978	$ 44,969	$ 40,102
Services	1,349	491	2,613	957
Investment income	47	176	50	254
Total revenues	23,662	20,645	47,632	41,313
Operating expenses:
Benefits	19,099	17,149	38,724	34,445
Operating costs	3,173	2,116	6,059	4,123
Depreciation and amortization	175	144	345	286
Total operating expenses	22,447	19,409	45,128	38,854
Income (loss) from operations	1,215	1,236	2,504	2,459
Interest expense	101	79	191	147
Other (income) expense, net	(8)	419	(29)	534
Income (loss) before income taxes and equity in net earnings	1,122	738	2,342	1,778
Provision for income taxes	427	183	713	416
Equity in net earnings (losses)	2	33	(2)	54
Net income	697	588	1,627	1,416
Less: Net income attributable to noncontrolling interests	(1)	0	(1)	0
Net income attributable to Humana	$ 696	$ 588	$ 1,626	$ 1,416
Basic earnings per common share (in dollars per share)	$ 5.50	$ 4.57	$ 12.83	$ 11.00
Diluted earnings per common share (in dollars per share)	$ 5.48	$ 4.55	$ 12.77	$ 10.94