Segment Information (Tables)

12 Months Ended

Dec. 31, 2014

Segment Reporting [Abstract]

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:

	Year Ended December 31
	2014			2013			2012
	(in millions of dollars)
Operating Revenue	$	10,493.6		$	10,347.0		$	10,459.2
Net Realized Investment Gain	16.1			6.8			56.2
Total Revenue	$	10,509.7		$	10,353.8		$	10,515.4
Operating Income	$	1,292.5		$	1,241.8		$	1,239.7
Net Realized Investment Gain	16.1			6.8			56.2
Non-operating Retirement-related Loss	(70.0		)	(32.9		)	(46.4		)
Costs Related to Early Retirement of Debt for Corporate	(13.2		)	—			—
Long-term Care Reserve Increase for Closed Block	(698.2		)	—			—
Unclaimed Death Benefits Reserve Increase for Unum US	—			(75.4		)	—
Unclaimed Death Benefits Reserve Increase for Colonial Life	—			(20.1		)	—
Group Life Waiver of Premium Benefit Reserve Reduction for Unum US	—			85.0			—
Income Before Income Tax	$	527.2		$	1,205.2		$	1,249.5

Premium Income by Major Line of Business within Each Segment

Premium income by major line of business within each of our segments is presented as follows:

	Year Ended December 31
	2014		2013		2012
	(in millions of dollars)
Unum US
Group Disability
Group Long-term Disability	$	1,553.5	$	1,553.9	$	1,578.8
Group Short-term Disability	558.1		519.6		476.7
Group Life and Accidental Death & Dismemberment
Group Life	1,262.3		1,213.9		1,182.1
Accidental Death & Dismemberment	125.9		121.6		115.3
Supplemental and Voluntary
Individual Disability	466.1		465.3		477.6
Voluntary Benefits	693.8		642.8		626.0
	4,659.7		4,517.1		4,456.5
Unum UK
Group Long-term Disability	418.9		389.9		409.7
Group Life	133.2		106.4		221.3
Supplemental	55.1		60.3		63.6
	607.2		556.6		694.6
Colonial Life
Accident, Sickness, and Disability	759.8		738.7		724.5
Life	231.8		221.1		209.7
Cancer and Critical Illness	282.1		272.4		260.3
	1,273.7		1,232.2		1,194.5
Closed Block
Individual Disability	624.8		687.5		736.4
Long-term Care	630.9		630.6		631.9
All Other	0.9		0.7		2.2
	1,256.6		1,318.8		1,370.5
Total	$	7,797.2	$	7,624.7	$	7,716.1

Selected Operating Statement Data by Segment

Selected operating statement data by segment is presented as follows:

	Unum US		Unum UK		Colonial Life		Closed Block		Corporate			Total
	(in millions of dollars)
Year Ended December 31, 2014
Premium Income	$	4,659.7	$	607.2	$	1,273.7	$	1,256.6	$	—		$	7,797.2
Net Investment Income	890.3		151.0		146.7		1,284.1		5.3			2,477.4
Other Income	122.1		—		0.1		91.8		5.0			219.0
Operating Revenue	$	5,672.1	$	758.2	$	1,420.5	$	2,632.5	$	10.3		$	10,493.6
Operating Income (Loss)	$	856.3	$	147.8	$	300.2	$	122.6	$	(134.4	)	$	1,292.5
Interest and Debt Expense Excluding Costs Related to Early Retirement of Debt	$	—	$	—	$	—	$	7.3	$	147.0		$	154.3
Depreciation and Amortization	$	314.2	$	19.2	$	194.1	$	5.9	$	1.0		$	534.4
Year Ended December 31, 2013
Premium Income	$	4,517.1	$	556.6	$	1,232.2	$	1,318.8	$	—		$	7,624.7
Net Investment Income	929.6		148.5		145.4		1,272.3		(3.7		)	2,492.1
Other Income	128.3		0.1		0.2		93.9		7.7			230.2
Operating Revenue	$	5,575.0	$	705.2	$	1,377.8	$	2,685.0	$	4.0		$	10,347.0
Operating Income (Loss)	$	859.0	$	132.0	$	284.9	$	109.4	$	(143.5	)	$	1,241.8
Interest and Debt Expense	$	0.1	$	—	$	—	$	8.4	$	140.9		$	149.4
Depreciation and Amortization	$	292.5	$	22.5	$	188.7	$	5.2	$	0.9		$	509.8
Year Ended December 31, 2012
Premium Income	$	4,456.5	$	694.6	$	1,194.5	$	1,370.5	$	—		$	7,716.1
Net Investment Income	952.3		170.8		138.6		1,230.5		23.0			2,515.2
Other Income	124.6		0.1		0.3		100.1		2.8			227.9
Operating Revenue	$	5,533.4	$	865.5	$	1,333.4	$	2,701.1	$	25.8		$	10,459.2
Operating Income (Loss)	$	847.1	$	131.3	$	274.3	$	95.5	$	(108.5	)	$	1,239.7
Interest and Debt Expense	$	1.1	$	—	$	—	$	10.4	$	133.9		$	145.4
Depreciation and Amortization	$	255.6	$	27.2	$	181.0	$	3.9	$	0.8		$	468.5

Deferred Policy Acquisition Costs by Segment

The following table provides the changes in deferred acquisition costs by segment:

							Colonial
	Unum US			Unum UK			Life			Total
	(in millions of dollars)
Year Ended December 31, 2014
Beginning of Year	$	1,051.5		$	34.3		$	743.4		$	1,829.2
Capitalization	292.7			10.5			220.8			524.0
Amortization	(248.1		)	(12.5		)	(180.2		)	(440.8		)
Adjustment Related to Unrealized Investment Gains	0.4			—			(9.6		)	(9.2		)
Foreign Currency	—			(1.9		)	—			(1.9		)
End of Year	$	1,096.5		$	30.4		$	774.4		$	1,901.3
Year Ended December 31, 2013
Beginning of Year	$	1,024.3		$	38.8		$	692.4		$	1,755.5
Capitalization	252.0			9.8			205.0			466.8
Amortization	(230.0		)	(14.7		)	(174.2		)	(418.9		)
Adjustment Related to Unrealized Investment Losses	5.2			—			20.2			25.4
Foreign Currency	—			0.4			—			0.4
End of Year	$	1,051.5		$	34.3		$	743.4		$	1,829.2
Year Ended December 31, 2012
Beginning of Year	$	971.8		$	40.9		$	664.4		$	1,677.1
Capitalization	249.2			11.8			206.3			467.3
Amortization	(196.5		)	(15.7		)	(166.5		)	(378.7		)
Adjustment Related to Unrealized Investment Gains	(0.2		)	—			(11.8		)	(12.0		)
Foreign Currency	—			1.8			—			1.8
End of Year	$	1,024.3		$	38.8		$	692.4		$	1,755.5

Assets by Segment

Assets by segment are as follows:

	December 31
	2014		2013
	(in millions of dollars)
Unum US	$	18,676.5	$	18,384.3
Unum UK	3,702.5		3,654.1
Colonial Life	3,692.2		3,482.9
Closed Block	33,960.2		31,564.2
Corporate	2,465.7		2,318.1
Total Assets	$	62,497.1	$	59,403.6