Segment Information (Tables)

3 Months Ended

Mar. 31, 2016

Segment Reporting [Abstract]

Premium Income by Major Line of Business within Each Segment

Segment information is as follows:

	Three Months Ended March 31
	2016		2015
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	430.6	$	405.3
Group Short-term Disability	157.5		147.7
Group Life and Accidental Death & Dismemberment
Group Life	351.5		335.0
Accidental Death & Dismemberment	34.6		32.6
Supplemental and Voluntary
Individual Disability	123.9		117.9
Voluntary Benefits	203.2		191.7
	1,301.3		1,230.2
Unum UK
Group Long-term Disability	93.1		96.5
Group Life	28.7		30.5
Supplemental	17.5		12.0
	139.3		139.0
Colonial Life
Accident, Sickness, and Disability	205.6		196.5
Life	67.7		62.3
Cancer and Critical Illness	77.9		73.4
	351.2		332.2
Closed Block
Individual Disability	133.6		146.5
Long-term Care	161.7		158.2
All Other	0.4		0.2
	295.7		304.9
Total Premium Income	$	2,087.5	$	2,006.3

Selected Operating Statement Data by Segment

	Unum US		Unum UK		Colonial Life		Closed Block		Corporate			Total
	(in millions of dollars)
Three Months Ended March 31, 2016
Premium Income	$	1,301.3	$	139.3	$	351.2	$	295.7	$	—		$	2,087.5
Net Investment Income	207.4		26.8		34.0		333.4		4.8			606.4
Other Income	29.0		—		0.3		22.4		0.3			52.0
Operating Revenue	$	1,537.7	$	166.1	$	385.5	$	651.5	$	5.1		$	2,745.9
Operating Income (Loss)	$	215.9	$	33.6	$	77.4	$	33.7	$	(31.8	)	$	328.8
Three Months Ended March 31, 2015
Premium Income	$	1,230.2	$	139.0	$	332.2	$	304.9	$	—		$	2,006.3
Net Investment Income	215.0		23.5		37.0		320.4		6.1			602.0
Other Income	30.9		—		—		23.2		0.3			54.4
Operating Revenue	$	1,476.1	$	162.5	$	369.2	$	648.5	$	6.4		$	2,662.7
Operating Income (Loss)	$	214.3	$	32.6	$	77.6	$	26.7	$	(29.9	)	$	321.3

	March 31		December 31
	2016		2015
	(in millions of dollars)
Assets
Unum US	$	17,963.4	$	18,242.4
Unum UK	3,453.7		3,432.4
Colonial Life	3,759.3		3,776.8
Closed Block	33,549.7		32,992.4
Corporate	3,241.8		2,119.6
Total Assets	$	61,967.9	$	60,563.6

Assets by Segment

	March 31		December 31
	2016		2015
	(in millions of dollars)
Assets
Unum US	$	17,963.4	$	18,242.4
Unum UK	3,453.7		3,432.4
Colonial Life	3,759.3		3,776.8
Closed Block	33,549.7		32,992.4
Corporate	3,241.8		2,119.6
Total Assets	$	61,967.9	$	60,563.6

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

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

	Three Months Ended March 31
	2016			2015
	(in millions of dollars)
Operating Revenue	$	2,745.9		$	2,662.7
Net Realized Investment Loss	(20.5		)	(15.3		)
Total Revenue	$	2,725.4		$	2,647.4
Operating Income	$	328.8		$	321.3
Net Realized Investment Loss	(20.5		)	(15.3		)
Non-operating Retirement-related Loss	(4.1		)	(3.0		)
Income Before Income Tax	$	304.2		$	303.0