Segment Information (Tables)

12 Months Ended

Dec. 31, 2016

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, 2016
Operating revenue	$	38,692.1	$	45,477.7	$	24.2		$	84,194.0
Operating gain (loss)	3,195.2		1,784.3		(177.8		)	4,801.7
Depreciation and amortization of property and equipment	—		—		576.0			576.0
Year ended December 31, 2015
Operating revenue	$	37,570.8	$	40,813.0	$	21.0		$	78,404.8
Operating gain (loss)	2,854.0		1,978.5		(79.4		)	4,753.1
Depreciation and amortization of property and equipment	—		—		515.6			515.6
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

Major Product Revenues

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

	2016		2015		2014
Commercial and Specialty Business
Managed care products	$	32,369.8	$	31,676.9	$	33,755.6
Managed care services	4,710.1		4,344.8		3,997.8
Dental/Vision products and services	1,182.3		1,111.7		1,037.3
Other	429.9		437.4		408.9
Total Commercial and Specialty Business	38,692.1		37,570.8		39,199.6
Government Business
Managed care products	45,028.5		40,307.0		33,344.6
Managed care services	449.2		506.0		451.8
Total Government Business	45,477.7		40,813.0		33,796.4
Other
Other	24.2		21.0		25.7
Total product revenues	$	84,194.0	$	78,404.8	$	73,021.7

Reconciliation Of Reportable Segment Operating Revenues 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:

	2016			2015			2014
Reportable segments operating revenues	$	84,194.0		$	78,404.8		$	73,021.7
Net investment income	779.5			677.6			724.4
Net realized gains on financial instruments	4.9			157.5			177.0
Other-than-temporary impairment losses recognized in income	(115.4		)	(83.4		)	(49.0		)
Total revenues	$	84,863.0		$	79,156.5		$	73,874.1

Reconciliation Of Reportable Segment Operating Gain To Income From Continuing Operations Before Income Taxes In 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:

	2016			2015			2014
Reportable segments operating gain	$	4,801.7		$	4,753.1		$	4,418.4
Net investment income	779.5			677.6			724.4
Net realized gains on financial instruments	4.9			157.5			177.0
Other-than-temporary impairment losses recognized in income	(115.4		)	(83.4		)	(49.0		)
Interest expense	(723.0		)	(653.0		)	(600.7		)
Amortization of other intangible assets	(192.3		)	(230.1		)	(220.9		)
Gain (loss) on extinguishment of debt	—			9.3			(81.1		)
Income from continuing operations before income tax expense	$	4,555.4		$	4,631.0		$	4,368.1