SEGMENT INFORMATION (Tables)

3 Months Ended

Mar. 31, 2015

Segment Reporting [Abstract]

Schedule of Segment Reporting Information, By Segment

Intersegment sales and expenses are recorded at fair value and eliminated in consolidation. Members served by our segments often use the same provider networks, enabling us in some instances to obtain more favorable contract terms with providers. Our segments also share indirect costs and assets. As a result, the profitability of each segment is interdependent. We allocate most operating expenses to our segments. Assets and certain corporate income and expenses are not allocated to the segments, including the portion of investment income not supporting segment operations, interest expense on corporate debt, and certain other corporate expenses. These items are managed at a corporate level. These corporate amounts are reported separately from our reportable segments and are included with intersegment eliminations in the tables presenting segment results below.

Our segment results were as follows for the three months ended March 31, 2015 and 2014, respectively:

	Retail		Group		Healthcare Services		Other Businesses		Eliminations/ Corporate			Consolidated
	(in millions)
Three months ended March 31, 2015
Revenues - external customers
Premiums:
Individual Medicare Advantage	$	7,433	$	—	$	—	$	—	$	—		$	7,433
Group Medicare Advantage	1,394		—		—		—		—			1,394
Medicare stand-alone PDP	1,003		—		—		—		—			1,003
Total Medicare	9,830		—		—		—		—			9,830
Fully-insured	1,094		1,384		—		—		—			2,478
Specialty	63		270		—		—		—			333
Medicaid and other	591		6		—		10		—			607
Total premiums	11,578		1,660		—		10		—			13,248
Services revenue:
Provider	—		9		308		—		—			317
ASO and other	4		160		—		2		—			166
Pharmacy	—		—		7		—		—			7
Total services revenue	4		169		315		2		—			490
Total revenues - external customers	11,582		1,829		315		12		—			13,738
Intersegment revenues
Services	—		22		4,413		—		(4,435		)	—
Products	—		—		1,150		—		(1,150		)	—
Total intersegment revenues	—		22		5,563		—		(5,585		)	—
Investment income	27		5		—		15		48			95
Total revenues	11,609		1,856		5,878		27		(5,537		)	13,833
Operating expenses:
Benefits	9,936		1,226		—		23		(180		)	11,005
Operating costs	1,254		453		5,606		3		(5,371		)	1,945
Depreciation and amortization	44		23		42		—		(16		)	93
Total operating expenses	11,234		1,702		5,648		26		(5,567		)	13,043
Income from operations	375		154		230		1		30			790
Interest expense	—		—		—		—		46			46
Income before income taxes	$	375	$	154	$	230	$	1	$	(16	)	$	744

	Retail		Group		Healthcare Services		Other Businesses		Eliminations/ Corporate			Consolidated
	(in millions)
Three months ended March 31, 2014
Revenues - external customers
Premiums:
Individual Medicare Advantage	$	6,460	$	—	$	—	$	—	$	—		$	6,460
Group Medicare Advantage	1,384		—		—		—		—			1,384
Medicare stand-alone PDP	865		—		—		—		—			865
Total Medicare	8,709		—		—		—		—			8,709
Fully-insured	525		1,329		—		—		—			1,854
Specialty	59		275		—		—		—			334
Medicaid and other	169		6		—		11		—			186
Total premiums	9,462		1,610		—		11		—			11,083
Services revenue:
Provider	—		5		307		—		—			312
ASO and other	14		188		—		3		—			205
Pharmacy	—		—		21		—		—			21
Total services revenue	14		193		328		3		—			538
Total revenues - external customers	9,476		1,803		328		14		—			11,621
Intersegment revenues
Services	—		19		3,481		—		(3,500		)	—
Products	—		—		846		—		(846		)	—
Total intersegment revenues	—		19		4,327		—		(4,346		)	—
Investment income	23		6		—		15		47			91
Total revenues	9,499		1,828		4,655		29		(4,299		)	11,712
Operating expenses:
Benefits	8,080		1,167		—		24		(147		)	9,124
Operating costs	1,010		493		4,434		4		(4,156		)	1,785
Depreciation and amortization	40		24		36		1		(19		)	82
Total operating expenses	9,130		1,684		4,470		29		(4,322		)	10,991
Income from operations	369		144		185		—		23			721
Interest expense	—		—		—		—		35			35
Income before income taxes	$	369	$	144	$	185	$	—	$	(12	)	$	686