Segment Information (Tables)

9 Months Ended

Sep. 30, 2016

Segment Reporting [Abstract]

Premium Income by Major Line of Business within Each Segment

Segment information is as follows:

	Three Months Ended September 30				Nine Months Ended September 30
	2016		2015		2016		2015
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	428.1	$	414.3	$	1,291.6	$	1,229.0
Group Short-term Disability	155.5		153.2		469.2		452.5
Group Life and Accidental Death & Dismemberment
Group Life	353.4		336.5		1,053.6		1,007.5
Accidental Death & Dismemberment	35.3		32.1		104.8		98.0
Supplemental and Voluntary
Individual Disability	125.6		119.6		374.4		355.9
Voluntary Benefits	197.1		186.1		602.1		565.5
Dental and Vision	20.0		—		20.0		—
	1,315.0		1,241.8		3,915.7		3,708.4
Unum UK
Group Long-term Disability	85.5		100.6		274.1		296.5
Group Life	24.9		29.7		80.9		90.6
Supplemental	16.9		14.3		52.4		38.7
	127.3		144.6		407.4		425.8
Colonial Life
Accident, Sickness, and Disability	207.7		196.5		619.2		591.1
Life	68.0		62.5		203.4		188.1
Cancer and Critical Illness	78.4		74.1		234.1		222.0
	354.1		333.1		1,056.7		1,001.2
Closed Block
Individual Disability	129.9		142.2		394.0		433.0
Long-term Care	161.4		158.6		482.0		475.0
All Other	1.7		0.5		2.7		1.2
	293.0		301.3		878.7		909.2
Total Premium Income	$	2,089.4	$	2,020.8	$	6,258.5	$	6,044.6

Selected Operating Statement Data by Segment

	Unum US		Unum UK		Colonial Life		Closed Block		Corporate			Total
	(in millions of dollars)
Three Months Ended September 30, 2016
Premium Income	$	1,315.0	$	127.3	$	354.1	$	293.0	$	—		$	2,089.4
Net Investment Income	207.3		28.5		36.1		334.1		5.4			611.4
Other Income	28.7		—		0.4		21.5		0.9			51.5
Operating Revenue	$	1,551.0	$	155.8	$	390.6	$	648.6	$	6.3		$	2,752.3
Operating Income (Loss)	$	231.0	$	28.2	$	79.0	$	28.6	$	(41.6	)	$	325.2
Three Months Ended September 30, 2015
Premium Income	$	1,241.8	$	144.6	$	333.1	$	301.3	$	—		$	2,020.8
Net Investment Income	214.3		28.0		35.9		327.5		6.4			612.1
Other Income	28.1		—		0.1		21.5		1.8			51.5
Operating Revenue	$	1,484.2	$	172.6	$	369.1	$	650.3	$	8.2		$	2,684.4
Operating Income (Loss)	$	218.7	$	32.7	$	76.3	$	27.7	$	(26.9	)	$	328.5

	Unum US		Unum UK		Colonial Life		Closed Block		Corporate			Total
	(in millions of dollars)
Nine Months Ended September 30, 2016
Premium Income	$	3,915.7	$	407.4	$	1,056.7	$	878.7	$	—		$	6,258.5
Net Investment Income	622.4		89.3		105.7		1,008.6		15.1			1,841.1
Other Income	85.6		0.2		1.0		65.3		2.5			154.6
Operating Revenue	$	4,623.7	$	496.9	$	1,163.4	$	1,952.6	$	17.6		$	8,254.2
Operating Income (Loss)	$	674.1	$	98.7	$	234.3	$	94.9	$	(109.1	)	$	992.9
Nine Months Ended September 30, 2015
Premium Income	$	3,708.4	$	425.8	$	1,001.2	$	909.2	$	—		$	6,044.6
Net Investment Income	645.0		90.1		109.8		979.6		20.3			1,844.8
Other Income	90.4		—		0.1		67.5		2.6			160.6
Operating Revenue	$	4,443.8	$	515.9	$	1,111.1	$	1,956.3	$	22.9		$	8,050.0
Operating Income (Loss)	$	635.8	$	103.6	$	231.5	$	91.0	$	(90.2	)	$	971.7

Assets by Segment

	September 30		December 31
	2016		2015
	(in millions of dollars)
Assets
Unum US	$	18,465.8	$	18,242.4
Unum UK	3,396.0		3,432.4
Colonial Life	3,940.5		3,776.8
Closed Block	34,821.9		33,000.9
Corporate	3,280.9		2,111.1
Total Assets	$	63,905.1	$	60,563.6

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 September 30						Nine Months Ended September 30
	2016			2015			2016			2015
	(in millions of dollars)
Total Revenue	$	2,763.3		$	2,657.8		$	8,250.0		$	8,008.9
Excluding:
Net Realized Investment Gain (Loss)	11.0			(26.6		)	(4.2		)	(41.1		)
Operating Revenue	$	2,752.3		$	2,684.4		$	8,254.2		$	8,050.0
Income Before Income Tax	$	332.1		$	298.9		$	976.5		$	921.7
Excluding:
Net Realized Investment Gain (Loss)	11.0			(26.6		)	(4.2		)	(41.1		)
Non-operating Retirement-related Loss	(4.1		)	(3.0		)	(12.2		)	(8.9		)
Operating Income	$	325.2		$	328.5		$	992.9		$	971.7