Segment Information (Tables)

6 Months Ended

Jun. 30, 2017

Segment Reporting [Abstract]

Premium Income by Major Line of Business within Each Segment

Segment information is as follows:

	Three Months Ended June 30				Six Months Ended June 30
	2017		2016		2017		2016
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	437.7	$	432.9	$	872.1	$	863.5
Group Short-term Disability	158.3		156.2		316.2		313.7
Group Life and Accidental Death & Dismemberment
Group Life	363.9		348.7		731.7		700.2
Accidental Death & Dismemberment	36.7		34.9		73.3		69.5
Supplemental and Voluntary
Individual Disability	106.7		124.9		213.7		248.8
Voluntary Benefits	213.2		201.8		428.4		405.0
Dental and Vision	41.2		—		82.7		—
	1,357.7		1,299.4		2,718.1		2,600.7
Unum UK
Group Long-term Disability	83.8		95.5		164.6		188.6
Group Life	25.4		27.3		50.2		56.0
Supplemental	17.6		18.0		33.3		35.5
	126.8		140.8		248.1		280.1
Colonial Life
Accident, Sickness, and Disability	220.1		205.9		439.2		411.5
Life	75.0		67.7		149.2		135.4
Cancer and Critical Illness	81.2		77.8		162.2		155.7
	376.3		351.4		750.6		702.6
Closed Block
Individual Disability	118.5		130.5		239.8		264.1
Long-term Care	160.9		158.9		324.0		320.6
All Other	2.0		0.6		4.5		1.0
	281.4		290.0		568.3		585.7
Total Premium Income	$	2,142.2	$	2,081.6	$	4,285.1	$	4,169.1

Selected Operating Statement Data by Segment

	Unum US		Unum UK		Colonial Life		Closed Block		Corporate			Total
	(in millions of dollars)
Three Months Ended June 30, 2017
Premium Income	$	1,357.7	$	126.8	$	376.3	$	281.4	$	—		$	2,142.2
Net Investment Income	205.6		33.2		36.7		340.0		5.0			620.5
Other Income	30.1		—		0.2		20.2		0.7			51.2
Operating Revenue	$	1,593.4	$	160.0	$	413.2	$	641.6	$	5.7		$	2,813.9
Operating Income (Loss)	$	247.8	$	28.9	$	81.8	$	32.6	$	(37.6	)	$	353.5
Three Months Ended June 30, 2016
Premium Income	$	1,299.4	$	140.8	$	351.4	$	290.0	$	—		$	2,081.6
Net Investment Income	207.7		34.0		35.6		341.1		4.9			623.3
Other Income	27.9		0.2		0.3		21.4		1.3			51.1
Operating Revenue	$	1,535.0	$	175.0	$	387.3	$	652.5	$	6.2		$	2,756.0
Operating Income (Loss)	$	227.2	$	36.9	$	77.9	$	32.6	$	(39.7	)	$	334.9

	Unum US		Unum UK		Colonial Life		Closed Block		Corporate			Total
	(in millions of dollars)
Six Months Ended June 30, 2017
Premium Income	$	2,718.1	$	248.1	$	750.6	$	568.3	$	—		$	4,285.1
Net Investment Income	408.1		59.8		71.8		675.3		7.9			1,222.9
Other Income	58.8		—		0.5		41.0		1.1			101.4
Operating Revenue	$	3,185.0	$	307.9	$	822.9	$	1,284.6	$	9.0		$	5,609.4
Operating Income (Loss)	$	486.9	$	55.5	$	164.2	$	64.2	$	(77.4	)	$	693.4
Six Months Ended June 30, 2016
Premium Income	$	2,600.7	$	280.1	$	702.6	$	585.7	$	—		$	4,169.1
Net Investment Income	415.1		60.8		69.6		674.5		9.7			1,229.7
Other Income	56.9		0.2		0.6		43.8		1.6			103.1
Operating Revenue	$	3,072.7	$	341.1	$	772.8	$	1,304.0	$	11.3		$	5,501.9
Operating Income (Loss)	$	443.1	$	70.5	$	155.3	$	66.3	$	(75.6	)	$	659.6

Assets by Segment

	June 30		December 31
	2017		2016
	(in millions of dollars)
Assets
Unum US	$	18,232.8	$	18,036.6
Unum UK	3,358.1		3,101.4
Colonial Life	4,039.8		3,923.2
Closed Block	34,466.6		33,734.3
Corporate	3,284.3		3,146.0
Total Assets	$	63,381.6	$	61,941.5

Reconciliation of Operating Revenue and Operating Income by Segment to Total Revenue and Income Before Income Tax

A reconciliation of total revenue to "operating revenue" and income before income tax to "operating income" is as follows:

	Three Months Ended June 30				Six Months Ended June 30
	2017		2016		2017			2016
	(in millions of dollars)
Total Revenue	$	2,822.0	$	2,761.3	$	5,628.5		$	5,486.7
Excluding:
Net Realized Investment Gain (Loss)	8.1		5.3		19.1			(15.2		)
Operating Revenue	$	2,813.9	$	2,756.0	$	5,609.4		$	5,501.9
Income Before Income Tax	$	361.6	$	340.2	$	691.9		$	644.4
Excluding:
Net Realized Investment Gain (Loss)	8.1		5.3		19.1			(15.2		)
Loss from Guaranty Fund Assessment	—		—		(20.6		)	—
Operating Income	$	353.5	$	334.9	$	693.4		$	659.6