Segment Information (Tables)

12 Months Ended

Dec. 31, 2013

Segment Reporting [Abstract]

Reconciliation of Total Operating Revenue and Operating Income by Segment to Revenue and Net Income

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

	Year Ended December 31
	2013			2012			2011
	(in millions of dollars)
Operating Revenue	$	10,347.0		$	10,459.2		$	10,282.9
Net Realized Investment Gain (Loss)	6.8			56.2			(4.9		)
Total Revenue	$	10,353.8		$	10,515.4		$	10,278.0
Operating Income	$	1,241.8		$	1,239.7		$	1,323.2
Net Realized Investment Gain (Loss)	6.8			56.2			(4.9		)
Non-operating Retirement-related Loss	(32.9		)	(46.4		)	(31.9		)
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			—			—
Deferred Acquisition Costs Impairment and Reserve Charges for Long-term Care Closed Block	—			—			(769.6		)
Reserve Charge for Individual Disability Closed Block	—			—			(183.5		)
Income Before Income Tax	$	1,205.2		$	1,249.5		$	333.3

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
	2013		2012		2011
	(in millions of dollars)
Unum US
Group Disability
Group Long-term Disability	$	1,553.9	$	1,578.8	1,580.2
Group Short-term Disability	519.6		476.7		455.2
Group Life and Accidental Death & Dismemberment
Group Life	1,213.9		1,182.1		1,106.7
Accidental Death & Dismemberment	121.6		115.3		109.2
Supplemental and Voluntary
Individual Disability - Recently Issued	465.3		477.6		464.7
Voluntary Benefits	642.8		626.0		580.0
	4,517.1		4,456.5		4,296.0
Unum UK
Group Long-term Disability	389.9		409.7		419.6
Group Life	106.4		221.3		203.6
Supplemental	60.3		63.6		64.4
	556.6		694.6		687.6
Colonial Life
Accident, Sickness, and Disability	738.7		724.5		695.3
Life	221.1		209.7		190.7
Cancer and Critical Illness	272.4		260.3		249.3
	1,232.2		1,194.5		1,135.3
Closed Block
Individual Disability	687.5		736.4		787.0
Long-term Care	630.6		631.9		608.1
All Other	0.7		2.2		0.2
	1,318.8		1,370.5		1,395.3
Total	$	7,624.7	$	7,716.1	$	7,514.2

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, 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
Year Ended December 31, 2011
Premium Income	$	4,296.0	$	687.6	$	1,135.3	$	1,395.3	$	—		$	7,514.2
Net Investment Income	951.4		189.9		132.4		1,189.7		56.2			2,519.6
Other Income	121.6		0.3		0.5		106.1		20.6			249.1
Operating Revenue	$	5,369.0	$	877.8	$	1,268.2	$	2,691.1	$	76.8		$	10,282.9
Operating Income (Loss)	$	816.9	$	190.7	$	270.1	$	123.9	$	(78.4	)	$	1,323.2
Interest and Debt Expense	$	1.0	$	—	$	—	$	10.5	$	131.8		$	143.3
Depreciation and Amortization	$	245.9	$	26.8	$	164.6	$	16.9	$	0.8		$	455.0

Deferred Policy Acquisition Costs [Text Block]

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

							Colonial			Closed
	Unum US			Unum UK			Life			Block			Total
	(in millions of dollars)
Year Ended December 31, 2013
Beginning of Year	$	1,024.3		$	38.8		$	692.4		$	—		$	1,755.5
Capitalized	252.0			9.8			205.0			—			466.8
Amortization	(230.0		)	(14.7		)	(174.2		)	—			(418.9		)
Adjustment Related to Unrealized Investment Gains/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
Capitalized	249.2			11.8			206.3			—			467.3
Amortization	(196.5		)	(15.7		)	(166.5		)	—			(378.7		)
Adjustment Related to Unrealized Investment Gains/Losses	(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
Year Ended December 31, 2011
Beginning of Year	$	943.7		$	41.0		$	628.0		$	203.4		$	1,816.1
Capitalized	220.3			15.4			203.1			3.7			442.5
Amortization	(188.1		)	(15.3		)	(151.2		)	(11.1		)	(365.7		)
Impairment of Long-term Care Deferred Acquisition Costs	—			—			—			(196.0		)	(196.0		)
Adjustment Related to Unrealized Investment Gains/Losses	(4.1		)	—			(15.5		)	—			(19.6		)
Foreign Currency	—			(0.2		)	—			—			(0.2		)
End of Year	$	971.8		$	40.9		$	664.4		$	—		$	1,677.1

Assets by Segment

Assets by segment are as follows:

	December 31
	2013		2012
	(in millions of dollars)
Unum US	$	18,384.3	$	19,391.2
Unum UK	3,654.1		3,975.8
Colonial Life	3,482.9		3,434.9
Closed Block	31,564.2		33,069.2
Corporate	2,318.1		2,365.0
Total	$	59,403.6	$	62,236.1