Segment Information

The results of our operations are described through three reportable segments: Commercial & Specialty Business, Government Business and Other, as further described in Note 19, “Segment Information,” to our audited consolidated financial statements as of and for the year ended December 31, 2017 included in our 2017 Annual Report on Form 10-K.

Financial data by reportable segment for the three and six months ended June 30, 2018 and 2017 is as follows:



	Commercial & Specialty Business		Government Business		Other			Total
Three Months Ended June 30, 2018
Operating revenue	$	9,162.9	$	13,543.0	$	8.9		$	22,714.8
Operating gain (loss)	1,052.8		537.4		(31.2		)	1,559.0
Three Months Ended June 30, 2017
Operating revenue	$	10,308.8	$	11,883.4	$	5.8		$	22,198.0
Operating gain (loss)	967.9		293.3		(34.2		)	1,227.0
Six Months Ended June 30, 2018
Operating revenue	$	18,229.3	$	26,805.4	$	22.4		$	45,057.1
Operating gain (loss)	2,461.2		1,028.3		(62.6		)	3,426.9
Six Months Ended June 30, 2017
Operating revenue	$	20,598.4	$	23,909.1	$	10.0		$	44,517.5
Operating gain (loss)	2,270.3		611.9		(69.8		)	2,812.4

The major product revenues for each of the reportable segments for the three and six months ended June 30, 2018 and 2017 are as follows:



	Three Months Ended June 30				Six Months Ended June 30
	2018		2017		2018		2017
Commercial & Specialty Business
Managed care products	$	7,445.9	$	8,664.4	$	14,822.0	$	17,324.8
Managed care services	1,302.1		1,232.4		2,584.3		2,455.0
Dental/Vision products and services	303.8		301.8		608.3		608.2
Other	111.1		110.2		214.7		210.4
Total Commercial & Specialty Business	9,162.9		10,308.8		18,229.3		20,598.4
Government Business
Managed care products	13,431.5		11,766.0		26,583.7		23,684.1
Managed care services	112.2		117.4		222.4		225.0
Total Government Business	13,543.7		11,883.4		26,806.1		23,909.1
Other
Other	8.2		5.8		21.7		10.0
Total product revenues	$	22,714.8	$	22,198.0	$	45,057.1	$	44,517.5

The classification between managed care products and managed care services in the above table primarily distinguishes between the levels of risk assumed. Managed care products represent insurance products where we bear the insurance risk, whereas managed care services represent product offerings where we provide claims adjudication and other administrative services to the customer, but the customer principally bears the insurance risk.

A reconciliation of reportable segments’ operating revenues to the amounts of total revenues included in our consolidated statements of income for the three and six months ended June 30, 2018 and 2017 is as follows:



	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
Reportable segments’ operating revenues	$	22,714.8		$	22,198.0		$	45,057.1		$	44,517.5
Net investment income	229.3			200.2			458.5			407.4
Net realized gains (losses) on financial instruments	4.0			16.2			(22.1		)	23.5
Other-than-temporary impairment losses recognized in income	(4.4		)	(7.2		)	(12.3		)	(15.3		)
Total revenues	$	22,943.7		$	22,407.2		$	45,481.2		$	44,933.1

A reconciliation of reportable segments’ operating gain to income before income tax expense included in our consolidated statements of income for the three and six months ended June 30, 2018 and 2017 is as follows:



	Three Months Ended June 30						Six Months Ended June 30
	2018			2017			2018			2017
Reportable segments’ operating gain	$	1,559.0		$	1,227.0		$	3,426.9		$	2,812.4
Net investment income	229.3			200.2			458.5			407.4
Net realized gains (losses) on financial instruments	4.0			16.2			(22.1		)	23.5
Other-than-temporary impairment losses recognized in income	(4.4		)	(7.2		)	(12.3		)	(15.3		)
Interest expense	(191.7		)	(189.9		)	(375.9		)	(424.9		)
Amortization of other intangible assets	(93.6		)	(40.6		)	(173.1		)	(82.4		)
Gain (loss) on extinguishment of debt	0.9			—			(18.2		)	—
Income before income tax expense	$	1,503.5		$	1,205.7		$	3,283.8		$	2,720.7