SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2021

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, By Segment

	Retail		Group and Specialty		Healthcare Services		Eliminations/ Corporate		Consolidated
	(in millions)
2021
External revenues
Premiums:
Individual Medicare Advantage	$	58,654	$	—	$	—	$	—	$	58,654
Group Medicare Advantage	6,955		—		—		—		6,955
Medicare stand-alone PDP	2,371		—		—		—		2,371
Total Medicare	67,980		—		—		—		67,980
Fully-insured	731		4,271		—		—		5,002
Specialty	—		1,731		—		—		1,731
Medicaid and other	5,109		—		—		—		5,109
Total premiums	73,820		6,002		—		—		79,822
Services revenue:
Home Solutions	—		—		1,166		—		1,166
Provider	—		—		413		—		413
ASO and other	23		816		—		—		839
Pharmacy	—		—		637		—		637
Total services revenue	23		816		2,216		—		3,055
Total external revenues	73,843		6,818		2,216		—		82,877
Intersegment revenues
Services	1		40		19,998		(20,039)		—
Products	—		—		9,024		(9,024)		—
Total intersegment revenues	1		40		29,022		(29,063)		—
Investment income	200		14		4		(31)		187
Total revenues	74,044		6,872		31,242		(29,094)		83,064
Operating expenses:
Benefits	64,907		4,951		—		(659)		69,199
Operating costs	6,764		1,687		29,801		(28,131)		10,121
Depreciation and amortization	436		85		177		(102)		596
Total operating expenses	72,107		6,723		29,978		(28,892)		79,916
Income (loss) from operations	1,937		149		1,264		(202)		3,148
Interest expense	—		—		—		326		326
Other income, net	—		—		—		(532)		(532)
Income before income taxes and equity in net earnings	1,937		149		1,264		4		3,354
Equity in net earnings	—		—		65		—		65
Segment earnings	$	1,937	$	149	$	1,329	$	4	$	3,419
Less: noncontrolling interests	—		—		(1)		—		(1)
Segment earnings attributable to Humana	$	1,937	$	149	$	1,328	$	4	$	3,418

	Retail		Group and Specialty		Healthcare Services		Eliminations/ Corporate		Consolidated
	(in millions)
2020
External revenues
Premiums:
Individual Medicare Advantage	$	51,697	$	—	$	—	$	—	$	51,697
Group Medicare Advantage	7,774		—		—		—		7,774
Medicare stand-alone PDP	2,742		—		—		—		2,742
Total Medicare	62,213		—		—		—		62,213
Fully-insured	688		4,761		—		602		6,051
Specialty	—		1,699		—		—		1,699
Medicaid and other	4,223		—		—		—		4,223
Total premiums	67,124		6,460		—		602		74,186
Services revenue:
Home Solutions	—		—		107		—		107
Provider	—		—		328		—		328
ASO and other	19		780		—		—		799
Pharmacy	—		—		581		—		581
Total services revenue	19		780		1,016		—		1,815
Total external revenues	67,143		7,240		1,016		602		76,001
Intersegment revenues
Services	—		29		19,491		(19,520)		—
Products	—		—		7,928		(7,928)		—
Total intersegment revenues	—		29		27,419		(27,448)		—
Investment income	155		16		13		970		1,154
Total revenues	67,298		7,285		28,448		(25,876)		77,155
Operating expenses:
Benefits	56,537		5,529		—		(438)		61,628
Operating costs	7,402		1,818		27,395		(26,563)		10,052
Depreciation and amortization	342		81		183		(117)		489
Total operating expenses	64,281		7,428		27,578		(27,118)		72,169
Income (loss) from operations	3,017		(143)		870		1,242		4,986
Interest expense	—		—		—		283		283
Other expense, net	—		—		—		103		103
Income (loss) before income taxes and equity in net earnings	3,017		(143)		870		856		4,600
Equity in net earnings	—		—		74		—		74
Segment earnings (loss)	$	3,017	$	(143)	$	944	$	856	$	4,674

	Retail		Group and Specialty		Healthcare Services		Eliminations/ Corporate		Consolidated
	(in millions)
2019
External revenues
Premiums:
Individual Medicare Advantage	$	43,128	$	—	$	—	$	—	$	43,128
Group Medicare Advantage	6,475		—		—		—		6,475
Medicare stand-alone PDP	3,165		—		—		—		3,165
Total Medicare	52,768		—		—		—		52,768
Fully-insured	588		5,123		—		—		5,711
Specialty	—		1,571		—		—		1,571
Medicaid and other	2,898		—		—		—		2,898
Total premiums	56,254		6,694		—		—		62,948
Services revenue:
Home Solutions	—		—		140		—		140
Provider	—		—		306		—		306
ASO and other	17		790		—		—		807
Pharmacy	—		—		186		—		186
Total services revenue	17		790		632		—		1,439
Total external revenues	56,271		7,484		632		—		64,387
Intersegment revenues
Services	—		18		18,255		(18,273)		—
Products	—		—		6,894		(6,894)		—
Total intersegment revenues	—		18		25,149		(25,167)		—
Investment income	195		23		2		281		501
Total revenues	56,466		7,525		25,783		(24,886)		64,888
Operating expenses:
Benefits	48,602		5,758		—		(503)		53,857
Operating costs	5,306		1,651		24,852		(24,428)		7,381
Depreciation and amortization	323		88		156		(109)		458
Total operating expenses	54,231		7,497		25,008		(25,040)		61,696
Income from operations	2,235		28		775		154		3,192
Interest expense	—		—		—		242		242
Other income, net	—		—		—		(506)		(506)
Income before income taxes and equity in net earnings	2,235		28		775		418		3,456
Equity in net earnings	—		—		14		—		14
Segment earnings	$	2,235	$	28	$	789	$	418	$	3,470