Segment Information (Tables)

12 Months Ended

Dec. 31, 2011

Segment Information [Abstract]

Schedule Of Segment Reporting Information, By Segment

	Retail		Employer Group		Health and Well-Being Services		Other Businesses		Eliminations/ Corporate			Consolidated
	(in millions)
2011
Revenues—external customers
Premiums:
Medicare Advantage	$	18,100	$	3,152	$	0	$	0	$	0		$	21,252
Medicare stand-alone PDP		2,317		8		0		253		0			2,578
Total Medicare		20,417		3,160		0		253		0			23,830
Fully-insured		861		4,782		0		0		0			5,643
Specialty		124		935		0		0		0			1,059
Military services		0		0		0		3,616		0			3,616
Medicaid and other		0		0		0		958		0			958
Total premiums		21,402		8,877		0		4,827		0			35,106
Services revenue:
Provider		0		0		892		0		0			892
ASO and other		16		356		0		85		0			457
Pharmacy		0		0		11		0		0			11
Total services revenue		16		356		903		85		0			1,360
Total revenues—external customers		21,418		9,233		903		4,912		0			36,466
Intersegment revenues
Services		0		14		8,510		0		(8,524	)		0
Products		0		0		1,820		0		(1,820	)		0
Total intersegment revenues		0		14		10,330		0		(10,344	)		0
Investment income		76		48		0		54		188			366
Total revenues		21,494		9,295		11,233		4,966		(10,156	)		36,832
Operating expenses:
Benefits		17,383		7,318		0		4,411		(289	)		28,823
Operating costs		2,405		1,650		10,798		461		(9,919	)		5,395
Depreciation and amortization		119		85		82		10		(26	)		270
Total operating expenses		19,907		9,053		10,880		4,882		(10,234	)		34,488
Income from operations		1,587		242		353		84		78			2,344
Interest expense		0		0		0		0		109			109
Income (loss) before income taxes	$	1,587	$	242	$	353	$	84	$	(31	)	$	2,235

	Retail		Employer Group		Health and Well-Being Services		Other Businesses			Eliminations/ Corporate			Consolidated
	(in millions)
2010
Revenues—external customers
Premiums:
Medicare Advantage	$	16,265	$	3,021	$	0	$	0		$	0		$	19,286
Medicare stand-alone PDP		1,959		5		0		355			0			2,319
Total Medicare		18,224		3,026		0		355			0			21,605
Fully-insured		746		5,169		0		0			0			5,915
Specialty		82		885		0		0			0			967
Military services		0		0		0		3,462			0			3,462
Medicaid and other		0		0		0		763			0			763
Total premiums		19,052		9,080		0		4,580			0			32,712
Services revenue:
Provider		0		0		34		0			0			34
ASO and other		11		395		0		115			0			521
Pharmacy		0		0		0		0			0			0
Total services revenue		11		395		34		115			0			555
Total revenues—external customers		19,063		9,475		34		4,695			0			33,267
Intersegment revenues
Services		0		12		7,494		0			(7,506	)		0
Products		0		0		1,292		0			(1,292	)		0
Total intersegment revenues		0		12		8,786		0			(8,798	)		0
Investment income		80		42		0		43			164			329
Total revenues		19,143		9,529		8,820		4,738			(8,634	)		33,596
Operating expenses:
Benefits		15,624		7,486		0		4,253			(246	)		27,117
Operating costs		2,113		1,662		8,575		475			(8,445	)		4,380
Depreciation and amortization		117		93		26		12			(3	)		245
Total operating expenses		17,854		9,241		8,601		4,740			(8,694	)		31,742
Income (loss) from operations		1,289		288		219		(2	)		60			1,854
Interest expense		0		0		0		0			105			105
Income (loss) before income taxes	$	1,289	$	288	$	219	$	(2	)	$	(45	)	$	1,749

	Retail		Employer Group			Health and Well-Being Services		Other Businesses		Eliminations/ Corporate			Consolidated
	(in millions)
2009
Revenues—external customers
Premiums:
Medicare Advantage	$	15,333	$	1,080		$	0	$	0	$	0		$	16,413
Medicare stand-alone PDP		2,323		5			0		0		0			2,328
Total Medicare		17,656		1,085			0		0		0			18,741
Fully-insured		638		5,547			0		0		0			6,185
Specialty		55		834			0		0		0			889
Military services		0		0			0		3,427		0			3,427
Medicaid and other		0		0			0		685		0			685
Total premiums		18,349		7,466			0		4,112		0			29,927
Services revenue:
Provider		0		0			17		0		0			17
ASO and other		10		370			0		123		0			503
Pharmacy		0		0			0		0		0			0
Total services revenue		10		370			17		123		0			520
Total revenues—external customers		18,359		7,836			17		4,235		0			30,447
Intersegment revenues
Services		0		14			8,003		0		(8,017	)		0
Products		0		0			949		0		(949	)		0
Total intersegment revenues		0		14			8,952		0		(8,966	)		0
Investment income		88		48			0		23		137			296
Total revenues		18,447		7,898			8,969		4,258		(8,829	)		30,743
Operating expenses:
Benefits		14,988		6,289			0		3,705		(198	)		24,784
Operating costs		1,985		1,533			8,768		431		(8,703	)		4,014
Depreciation and amortization		115		89			18		25		(10	)		237
Total operating expenses		17,088		7,911			8,786		4,161		(8,911	)		29,035
Income (loss) from operations		1,359		(13	)		183		97		82			1,708
Interest expense		0		0			0		0		106			106
Income (loss) before income taxes	$	1,359	$	(13	)	$	183	$	97	$	(24	)	$	1,602