Segment Information (Tables)

12 Months Ended

Dec. 31, 2012

Segment Reporting [Abstract]

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

A reconciliation of total operating revenue and operating income by segment to revenue and net income as reported in our consolidated statements of income follows:

	Year Ended December 31
	2012			2011			2010
	(in millions of dollars)
Operating Revenue by Segment	$	10,459.2		$	10,282.9		$	10,168.5
Net Realized Investment Gain (Loss)	56.2			(4.9		)	24.7
Total Revenue	$	10,515.4		$	10,278.0		$	10,193.2
Operating Income by Segment	$	1,239.7		$	370.1		$	1,327.4
Net Realized Investment Gain (Loss)	56.2			(4.9		)	24.7
Non-operating Retirement-related Loss	(46.4		)	(31.9		)	(32.2		)
Income Tax	(355.1		)	(49.1		)	(441.2		)
Net Income	$	894.4		$	284.2		$	878.7

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
	2012		2011		2010
	(in millions of dollars)
Unum US
Group Disability
Group Long-term Disability	$	1,578.8	$	1,580.2	$	1,639.4
Group Short-term Disability	476.7		455.2		430.9
Group Life and Accidental Death & Dismemberment
Group Life	1,182.1		1,106.7		1,090.3
Accidental Death & Dismemberment	115.3		109.2		106.1
Supplemental and Voluntary
Individual Disability - Recently Issued	477.6		464.7		457.9
Voluntary Benefits	626.0		580.0		530.8
	4,456.5		4,296.0		4,255.4
Unum UK
Group Long-term Disability	409.7		419.6		421.2
Group Life	221.3		203.6		171.6
Supplemental and Voluntary	63.6		64.4		57.8
	694.6		687.6		650.6
Colonial Life
Accident, Sickness, and Disability	724.5		695.3		661.0
Life	209.7		190.7		176.5
Cancer and Critical Illness	260.3		249.3		238.2
	1,194.5		1,135.3		1,075.7
Closed Block
Individual Disability	736.4		787.0		847.0
Long-term Care	631.9		608.1		599.2
All Other	2.2		0.2		3.5
	1,370.5		1,395.3		1,449.7
Total	$	7,716.1	$	7,514.2	$	7,431.4

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, 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	$	(829.2	)	$	(78.4	)	$	370.1
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
Year Ended December 31, 2010
Premium Income	$	4,255.4	$	650.6	$	1,075.7	$	1,449.7		$	—		$	7,431.4
Net Investment Income	941.5		170.5		122.5		1,166.4			94.6			2,495.5
Other Income	122.8		1.2		0.7		113.6			3.3			241.6
Operating Revenue	$	5,319.7	$	822.3	$	1,198.9	$	2,729.7		$	97.9		$	10,168.5
Operating Income (Loss)	$	769.0	$	209.0	$	269.7	$	118.6		$	(38.9	)	$	1,327.4
Interest and Debt Expense	$	1.2	$	—	$	—	$	11.7		$	128.9		$	141.8
Depreciation and Amortization	$	245.6	$	24.8	$	163.0	$	23.6		$	1.1		$	458.1

Deferred Policy Acquisition Costs

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, 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
Year Ended December 31, 2010
Beginning of Year	$	932.4		$	40.8		$	593.5		$	217.6		$	1,784.3
Capitalized	207.8			15.1			196.8			2.8			422.5
Amortization	(192.6		)	(13.6		)	(150.1		)	(17.0		)	(373.3		)
Adjustment Related to Unrealized Investment Gains/Losses	(3.9		)	—			(12.2		)	—			(16.1		)
Foreign Currency	—			(1.3		)	—			—			(1.3		)
End of Year	$	943.7		$	41.0		$	628.0		$	203.4		$	1,816.1

Assets by Segment

Assets by segment are as follows:

	December 31
	2012		2011
	(in millions of dollars)
Unum US	$	19,391.2	$	18,583.6
Unum UK	3,975.8		3,549.5
Colonial Life	3,434.9		3,167.8
Closed Block	33,069.2		31,439.5
Corporate	2,365.0		2,814.8
Total	$	62,236.1	$	59,555.2