Segment Information (Tables)

9 Months Ended

Sep. 30, 2021

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
	2021		2020		2021		2020
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	451.4	$	450.5	$	1,367.7	$	1,374.5
Group Short-term Disability	212.4		196.2		641.2		603.0
Group Life and Accidental Death & Dismemberment
Group Life	404.2		406.3		1,228.8		1,235.4
Accidental Death & Dismemberment	39.6		39.7		123.0		123.1
Supplemental and Voluntary
Individual Disability	115.7		117.7		345.0		340.3
Voluntary Benefits	209.6		212.2		640.4		666.6
Dental and Vision	67.9		60.8		202.6		190.9
	1,500.8		1,483.4		4,548.7		4,533.8
Unum International
Unum UK
Group Long-term Disability	101.6		92.2		303.8		272.0
Group Life	29.1		27.3		84.4		83.3
Supplemental	28.3		25.4		84.2		73.9
Unum Poland	22.6		20.5		67.1		57.9
	181.6		165.4		539.5		487.1
Colonial Life
Accident, Sickness, and Disability	238.0		238.9		715.1		738.4
Life	94.6		91.9		287.3		282.5
Cancer and Critical Illness	88.2		89.1		264.5		272.3
	420.8		419.9		1,266.9		1,293.2
Closed Block
Long-term Care	176.1		167.7		528.4		498.2
Individual Disability	72.3		80.0		216.8		240.1
All Other	2.1		1.7		6.1		5.8
	250.5		249.4		751.3		744.1
Total Premium Income	$	2,353.7	$	2,318.1	$	7,106.4	$	7,058.2

Selected Operating Statement Data by Segment

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Three Months Ended September 30, 2021
Premium Income	$	1,500.8	$	181.6	$	420.8	$	250.5	$	—	$	2,353.7
Net Investment Income	176.2		33.1		51.8		284.6		4.5		550.2
Other Income	43.5		0.4		0.3		19.3		2.4		65.9
Adjusted Operating Revenue	$	1,720.5	$	215.1	$	472.9	$	554.4	$	6.9	$	2,969.8
Adjusted Operating Income (Loss)	$	88.5	$	27.4	$	80.1	$	109.8	$	(45.4)	$	260.4
Three Months Ended September 30, 2020
Premium Income	$	1,483.4	$	165.4	$	419.9	$	249.4	$	—	$	2,318.1
Net Investment Income	190.7		26.3		43.7		351.2		1.3		613.2
Other Income	42.0		0.2		0.3		17.8		0.3		60.6
Adjusted Operating Revenue	$	1,716.1	$	191.9	$	463.9	$	618.4	$	1.6	$	2,991.9
Adjusted Operating Income (Loss)	$	188.2	$	21.4	$	92.2	$	70.8	$	(54.1)	$	318.5

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Nine Months Ended September 30, 2021
Premium Income	$	4,548.7	$	539.5	$	1,266.9	$	751.3	$	—	$	7,106.4
Net Investment Income	539.5		94.8		131.1		876.5		20.5		1,662.4
Other Income	125.2		0.6		0.8		49.8		4.1		180.5
Adjusted Operating Revenue	$	5,213.4	$	634.9	$	1,398.8	$	1,677.6	$	24.6	$	8,949.3
Adjusted Operating Income (Loss)	$	383.5	$	78.6	$	249.2	$	318.0	$	(132.8)	$	896.5
Nine Months Ended September 30, 2020
Premium Income	$	4,533.8	$	487.1	$	1,293.2	$	744.1	$	—	$	7,058.2
Net Investment Income	547.2		79.1		118.2		1,013.6		9.1		1,767.2
Other Income	117.5		0.4		0.9		49.7		0.5		169.0
Adjusted Operating Revenue	$	5,198.5	$	566.6	$	1,412.3	$	1,807.4	$	9.6	$	8,994.4
Adjusted Operating Income (Loss)	$	681.9	$	55.9	$	264.2	$	137.2	$	(158.1)	$	981.1

Assets by Segment

	September 30		December 31
	2021		2020
	(in millions of dollars)
Assets
Unum US	$	18,898.8	$	19,034.2
Unum International	4,202.7		4,206.2
Colonial Life	4,918.1		4,864.3
Closed Block	38,227.1		38,187.2
Corporate	4,351.2		4,333.9
Total Assets	$	70,597.9	$	70,625.8

Reconciliation of Total Revenue and Income Before Income Tax to Adjusted Operating Revenue and Adjusted Operating Income

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

	Three Months Ended September 30				Nine Months Ended September 30
	2021		2020		2021		2020
	(in millions of dollars)
Total Revenue	$	2,969.7	$	2,996.3	$	9,034.7	$	8,888.6
Excluding:
Net Realized Investment Gain (Loss)	(0.1)		4.4		85.4		(105.8)
Adjusted Operating Revenue	$	2,969.8	$	2,991.9	$	8,949.3	$	8,994.4
Income Before Income Tax	$	409.9	$	299.6	$	871.3	$	839.3
Excluding:
Net Realized Investment Gains and Losses
Net Realized Investment Gain Related to Reinsurance Transaction	—		—		67.6		—
Net Realized Investment Gain (Loss), Other	(0.1)		4.4		17.8		(105.8)
Total Net Realized Investment Gain (Loss)	(0.1)		4.4		85.4		(105.8)
Items Related to Closed Block Individual Disability Reinsurance Transaction
Change in Benefit Reserves and Transaction Costs	—		—		(139.3)		—
Amortization of the Cost of Reinsurance	(19.7)		—		(59.4)		—
Total Items Related to Closed Block Individual Disability Reinsurance Transaction	(19.7)		—		(198.7)		—
Net Reserve Decrease Related to Reserve Assumption Updates	181.4		—		181.4		—
Impairment Loss on Internal-Use Software	(12.1)		—		(12.1)		—
Cost Related to Early Retirement of Debt	—		—		(67.3)		—
Impairment Loss on ROU Asset	—		—		(13.9)		(12.7)
Costs Related to Organizational Design Update	—		(23.3)		—		(23.3)
Adjusted Operating Income	$	260.4	$	318.5	$	896.5	$	981.1