SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2018

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, By Segment

Our segment results were as follows for the three months ended March 31, 2018 and 2017:

	Retail		Group and Specialty		Healthcare Services		Individual Commercial			Other Businesses		Eliminations/ Corporate			Consolidated
	(in millions)
Three months ended March 31, 2018
Revenues - external customers
Premiums:
Individual Medicare Advantage	$	8,970	$	—	$	—	$	—		$	—	$	—		$	8,970
Group Medicare Advantage	1,524		—		—		—			—		—			1,524
Medicare stand-alone PDP	896		—		—		—			—		—			896
Total Medicare	11,390		—		—		—			—		—			11,390
Fully-insured	125		1,392		—		(5		)	—		—			1,512
Specialty	—		347		—		—			—		—			347
Medicaid and other	553		—		—		—			9		—			562
Total premiums	12,068		1,739		—		(5		)	9		—			13,811
Services revenue:
Provider	—		—		65		—			—		—			65
ASO and other	2		219		—		—			2		—			223
Pharmacy	—		—		39		—			—		—			39
Total services revenue	2		219		104		—			2		—			327
Total revenues - external customers	12,070		1,958		104		(5		)	11		—			14,138
Intersegment revenues
Services	—		5		4,018		—			—		(4,023		)	—
Products	—		—		1,535		—			—		(1,535		)	—
Total intersegment revenues	—		5		5,553		—			—		(5,558		)	—
Investment income	37		7		6		—			35		56			141
Total revenues	12,107		1,970		5,663		(5		)	46		(5,502		)	14,279
Operating expenses:
Benefits	10,552		1,273		—		(60		)	26		(121		)	11,670
Operating costs	1,222		463		5,441		2			2		(5,381		)	1,749
Depreciation and amortization	66		23		49		—			—		(38		)	100
Total operating expenses	11,840		1,759		5,490		(58		)	28		(5,540		)	13,519
Income from operations	267		211		173		53			18		38			760
Interest expense	—		—		—		—			—		53			53
Income (loss) before income taxes	$	267	$	211	$	173	$	53		$	18	$	(15	)	$	707

	Retail		Group and Specialty		Healthcare Services		Individual Commercial		Other Businesses			Eliminations/ Corporate			Consolidated
	(in millions)
Three months ended March 31, 2017
Revenues - external customers
Premiums:
Individual Medicare Advantage	$	8,376	$	—	$	—	$	—	$	—		$	—		$	8,376
Group Medicare Advantage	1,318		—		—		—		—			—			1,318
Medicare stand-alone PDP	941		—		—		—		—			—			941
Total Medicare	10,635		—		—		—		—			—			10,635
Fully-insured	118		1,378		—		283		—			—			1,779
Specialty	—		322		—		—		—			—			322
Medicaid and other	653		—		—		—		9			—			662
Total premiums	11,406		1,700		—		283		9			—			13,398
Services revenue:
Provider	—		—		70		—		—			—			70
ASO and other	2		161		—		—		2			—			165
Pharmacy	—		—		18		—		—			—			18
Total services revenue	2		161		88		—		2			—			253
Total revenues - external customers	11,408		1,861		88		283		11			—			13,651
Intersegment revenues
Services	—		5		4,310		—		—			(4,315		)	—
Products	—		—		1,552		—		—			(1,552		)	—
Total intersegment revenues	—		5		5,862		—		—			(5,867		)	—
Investment income	25		11		8		1		21			45			111
Total revenues	11,433		1,877		5,958		284		32			(5,822		)	13,762
Operating expenses:
Benefits	10,051		1,286		—		156		29			(196		)	11,326
Operating costs	954		399		5,680		62		4			(5,546		)	1,553
Merger termination fee and related costs, net	—		—		—		—		—			(947		)	(947		)
Depreciation and amortization	58		21		34		3		—			(24		)	92
Total operating expenses	11,063		1,706		5,714		221		33			(6,713		)	12,024
Income (loss) from operations	370		171		244		63		(1		)	891			1,738
Interest expense	—		—		—		—		—			49			49
Income (loss) before income taxes	$	370	$	171	$	244	$	63	$	(1	)	$	842		$	1,689