SEGMENT INFORMATION (Tables)

12 Months Ended

Dec. 31, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, By Segment

	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:
Provider	—		—		446		—			446
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 of Kindred at Home	—		—		14		—			14
Segment earnings	$	2,235	$	28	$	789	$	418		$	3,470

Premium and services revenues derived from our contracts with the federal government, as a percentage of our total premium and services revenues, was approximately 82% for 2019, compared to 81% for 2018, and 79% for 2017.

	Retail		Group and Specialty		Healthcare Services		Individual Commercial			Other Businesses		Eliminations/ Corporate			Consolidated
	(in millions)
2018
External revenues
Premiums:
Individual Medicare Advantage	$	35,656	$	—	$	—	$	—		$	—	$	—		$	35,656
Group Medicare Advantage	6,103		—		—		—			—		—			6,103
Medicare stand-alone PDP	3,584		—		—		—			—		—			3,584
Total Medicare	45,343		—		—		—			—		—			45,343
Fully-insured	510		5,444		—		8			—		—			5,962
Specialty	—		1,359		—		—			—		—			1,359
Medicaid and other	2,255		—		—		—			22		—			2,277
Total premiums	48,108		6,803		—		8			22		—			54,941
Services revenue:
Provider	—		—		404		—			—		—			404
ASO and other	11		835		—		—			4		—			850
Pharmacy	—		—		203		—			—		—			203
Total services revenue	11		835		607		—			4		—			1,457
Total external revenues	48,119		7,638		607		8			26		—			56,398
Intersegment revenues
Services	—		18		16,840		—			—		(16,858		)	—
Products	—		—		6,330		—			—		(6,330		)	—
Total intersegment revenues	—		18		23,170		—			—		(23,188		)	—
Investment income	136		23		34		—			110		211			514
Total revenues	48,255		7,679		23,811		8			136		(22,977		)	56,912
Operating expenses:
Benefits	40,925		5,420		—		(70		)	77		(470		)	45,882
Operating costs	5,327		1,810		22,905		4			6		(22,527		)	7,525
Depreciation and amortization	270		88		163		—			—		(116		)	405
Total operating expenses	46,522		7,318		23,068		(66		)	83		(23,113		)	53,812
Income from operations	1,733		361		743		74			53		136			3,100
Loss on sale of business	—		—		—		—			—		786			786
Interest expense	—		—		—		—			—		218			218
Other expense, net	—		—		—		—			—		33			33
Income (loss) before income taxes and equity in net earnings	1,733		361		743		74			53		(901		)	2,063
Equity in net earnings of Kindred at Home	—		—		11		—			—		—			11
Segment earnings (losses)	$	1,733	$	361	$	754	$	74		$	53	$	(901	)	$	2,074

	Retail		Group and Specialty		Healthcare Services		Individual Commercial		Other Businesses			Eliminations/ Corporate			Consolidated
	(in millions)
2017
External revenues
Premiums:
Individual Medicare Advantage	$	32,720	$	—	$	—	$	—	$	—		$	—		$	32,720
Group Medicare Advantage	5,155		—		—		—		—			—			5,155
Medicare stand-alone PDP	3,702		—		—		—		—			—			3,702
Total Medicare	41,577		—		—		—		—			—			41,577
Fully-insured	478		5,462		—		947		—			—			6,887
Specialty	—		1,310		—		—		—			—			1,310
Medicaid and other	2,571		—		—		—		35			—			2,606
Total premiums	44,626		6,772		—		947		35			—			52,380
Services revenue:
Provider	—		—		258		—		—			—			258
ASO and other	10		626		—		—		8			—			644
Pharmacy	—		—		80		—		—			—			80
Total services revenue	10		626		338		—		8			—			982
Total external revenues	44,636		7,398		338		947		43			—			53,362
Intersegment revenues
Services	—		20		17,293		—		—			(17,313		)	—
Products	—		—		6,292		—		—			(6,292		)	—
Total intersegment revenues	—		20		23,585		—		—			(23,605		)	—
Investment income	90		31		35		4		87			158			405
Total revenues	44,726		7,449		23,958		951		130			(23,447		)	53,767
Operating expenses:
Benefits	38,218		5,363		—		544		131			(760		)	43,496
Operating costs	4,292		1,590		22,848		201		12			(22,376		)	6,567
Merger termination fee and related costs, net	—		—		—		—		—			(936		)	(936		)
Depreciation and amortization	238		84		143		13		—			(100		)	378
Total operating expenses	42,748		7,037		22,991		758		143			(24,172		)	49,505
Income (loss) from operations	1,978		412		967		193		(13		)	725			4,262
Interest expense	—		—		—		—		—			242			242
Income (loss) before income taxes and equity in net earnings	1,978		412		967		193		(13		)	483			4,020
Equity in net earnings of Kindred at Home	—		—		—		—		—			—			—
Segment earnings (losses)	$	1,978	$	412	$	967	$	193	$	(13	)	$	483		$	4,020