Condensed Consolidated Statements of Income - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Income Statement [Abstract]
Services revenue, type	Health Care [Member]	Health Care [Member]
Revenues:
Premiums	$ 22,703	$ 20,124
Services	1,264	466
Investment income	3	78
Total revenues	23,970	20,668
Operating expenses:
Benefits	19,625	17,296
Operating costs	2,886	2,007
Depreciation and amortization	170	142
Total operating expenses	22,681	19,445
Income from operations	1,289	1,223
Interest expense	90	68
Other (income) expense, net	(21)	115
Income before income taxes and equity in net earnings	1,220	1,040
Provision for income taxes	286	233
Equity in net (losses) earnings	(4)	21
Net income	930	828
Less: Net income attributable to noncontrolling interests	0	0
Net income attributable to Humana	$ 930	$ 828
Basic earnings per common share (in dollars per share)	$ 7.32	$ 6.42
Diluted earnings per common share (in dollars per share)	$ 7.29	$ 6.39