Segment Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

Financial Data By Reportable Segment

Financial data by reportable segment for the years ended December 31 is as follows:

	Commercial and Specialty Business		Government Business		Other			Total
Year ended December 31, 2014
Operating revenue	$	39,199.6	$	33,796.4	$	25.7		$	73,021.7
Operating gain (loss)	3,260.9		1,191.9		(34.4		)	4,418.4
Depreciation and amortization of property and equipment	—		—		474.3			474.3
Year ended December 31, 2013
Operating revenue	$	39,404.2	$	30,752.6	$	34.6		$	70,191.4
Operating gain (loss)	3,176.4		844.0		(19.0		)	4,001.4
Depreciation and amortization of property and equipment	—		—		457.1			457.1
Year ended December 31, 2012
Operating revenue	$	39,639.9	$	20,838.9	$	35.2		$	60,514.0
Operating gain (loss)	3,396.3		285.4		(61.8		)	3,619.9
Depreciation and amortization of property and equipment	—		—		363.5			363.5

Major Product Revenues From External Customers

The major product revenues for each of the reportable segments for the years ended December 31 are as follows:

	2014		2013		2012
Commercial and Specialty Business
Managed care products	$	33,755.6	$	34,516.9	$	34,875.4
Managed care services	3,997.8		3,474.0		3,446.9
Dental/Vision products and services	1,037.3		952.5		903.9
Other	408.9		460.8		413.7
Total Commercial and Specialty Business	39,199.6		39,404.2		39,639.9
Government Business
Managed care products	33,344.6		30,347.1		20,460.0
Managed care services	451.8		405.5		378.9
Total Government Business	33,796.4		30,752.6		20,838.9
Other
Other	25.7		34.6		35.2
Total product revenues	$	73,021.7	$	70,191.4	$	60,514.0

Reconciliation Of Revenue From Reportable Segments To The Consolidated Statements Of Income

A reconciliation of reportable segment operating revenues to the amounts of total revenues included in the consolidated statements of income for the years ended December 31 is as follows:

	2014			2013			2012
Reportable segments operating revenues	$	73,021.7		$	70,191.4		$	60,514.0
Net investment income	724.4			659.1			686.1
Net realized gains on investments	177.0			271.9			334.9
Other-than-temporary impairment losses recognized in income	(49.0		)	(98.9		)	(37.8		)
Total revenues	$	73,874.1		$	71,023.5		$	61,497.2

Reconciliation Of Operating Gain To Income From Reportable Segments To The Consolidated Statements Of Income

A reconciliation of reportable segment operating gain to income from continuing operations before income taxes included in the consolidated statements of income for the years ended December 31 is as follows:

	2014			2013			2012
Reportable segments operating gain	$	4,418.4		$	4,001.4		$	3,619.9
Net investment income	724.4			659.1			686.1
Net realized gains on investments	177.0			271.9			334.9
Other-than-temporary impairment losses recognized in income	(49.0		)	(98.9		)	(37.8		)
Interest expense	(600.7		)	(602.7		)	(511.8		)
Amortization of other intangible assets	(220.9		)	(245.3		)	(233.0		)
Loss on extinguishment of debt	(81.1		)	(145.3		)	—
Income from continuing operations before income tax expense	$	4,368.1		$	3,840.2		$	3,858.3