Segment Information (Tables)

9 Months Ended

Sep. 30, 2023

Segment Reporting [Abstract]

Premium Income by Major Line of Business within Each Segment

Segment information is shown below. Certain prior year amounts were reclassified to conform to current year presentation.

	Three Months Ended September 30				Nine Months Ended September 30
	2023		2022		2023		2022
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	518.5	$	480.9	$	1,539.3	$	1,419.2
Group Short-term Disability	256.5		232.2		753.0		685.9
Group Life and Accidental Death & Dismemberment
Group Life	423.0		417.7		1,254.3		1,249.9
Accidental Death & Dismemberment	44.1		43.8		131.2		129.7
Supplemental and Voluntary
Voluntary Benefits	209.5		196.2		637.4		629.2
Individual Disability	136.7		118.9		386.7		350.3
Dental and Vision	69.4		67.1		206.8		206.6
	1,657.7		1,556.8		4,908.7		4,670.8
Unum International
Unum UK
Group Long-term Disability	101.1		89.8		297.5		287.5
Group Life	44.2		35.0		124.5		100.5
Supplemental	34.6		27.4		99.9		85.8
Unum Poland	30.7		21.1		85.2		66.7
	210.6		173.3		607.1		540.5
Colonial Life
Accident, Sickness, and Disability	236.7		236.1		708.0		714.0
Life	106.2		100.2		318.1		303.2
Cancer and Critical Illness	88.3		87.0		265.2		264.4
	431.2		423.3		1,291.3		1,281.6
Closed Block
Long-term Care	172.1		174.5		521.2		523.0
All Other	54.3		61.0		166.0		190.4
	226.4		235.5		687.2		713.4
Total Premium Income	$	2,525.9	$	2,388.9	$	7,494.3	$	7,206.3

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, 2023
Premium Income	$	1,657.7	$	210.6	$	431.2	$	226.4	$	—	$	2,525.9
Net Investment Income	166.2		27.3		39.3		274.9		18.3		526.0
Other Income	58.0		0.5		0.3		12.8		—		71.6
Adjusted Operating Revenue	$	1,881.9	$	238.4	$	470.8	$	514.1	$	18.3	$	3,123.5
Adjusted Operating Income (Loss)	$	357.8	$	36.8	$	102.9	$	34.2	$	(41.5)	$	490.2
Three Months Ended September 30, 2022
Premium Income	$	1,556.8	$	173.3	$	423.3	$	235.5	$	—	$	2,388.9
Net Investment Income	170.6		37.0		38.6		251.4		14.0		511.6
Other Income	49.0		0.2		0.3		13.1		0.4		63.0
Adjusted Operating Revenue	$	1,776.4	$	210.5	$	462.2	$	500.0	$	14.4	$	2,963.5
Adjusted Operating Income (Loss)	$	280.8	$	24.9	$	117.9	$	42.1	$	(49.5)	$	416.2

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Nine Months Ended September 30, 2023
Premium Income	$	4,908.7	$	607.1	$	1,291.3	$	687.2	$	—	$	7,494.3
Net Investment Income	481.5		104.0		114.6		796.0		69.8		1,565.9
Other Income	166.1		1.0		0.9		40.1		2.5		210.6
Adjusted Operating Revenue	$	5,556.3	$	712.1	$	1,406.8	$	1,523.3	$	72.3	$	9,270.8
Adjusted Operating Income (Loss)	$	1,013.4	$	118.7	$	312.3	$	143.6	$	(109.9)	$	1,478.1
Nine Months Ended September 30, 2022
Premium Income	$	4,670.8	$	540.5	$	1,281.6	$	713.4	$	—	$	7,206.3
Net Investment Income	509.4		122.3		115.4		817.7		33.0		1,597.8
Other Income	146.8		0.7		0.8		45.6		3.6		197.5
Adjusted Operating Revenue	$	5,327.0	$	663.5	$	1,397.8	$	1,576.7	$	36.6	$	9,001.6
Adjusted Operating Income (Loss)	$	741.0	$	78.9	$	317.4	$	207.6	$	(126.8)	$	1,218.1

Assets by Segment

	September 30		December 31
	2023		2022
	(in millions of dollars)
Assets
Unum US	$	15,088.5	$	16,356.3
Unum International	3,165.9		3,129.4
Colonial Life	4,608.6		4,575.0
Closed Block	33,070.4		33,776.6
Corporate	4,021.1		3,311.2
Total Assets	$	59,954.5	$	61,148.5

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
	2023		2022		2023		2022
	(in millions of dollars)
Total Revenue	$	3,092.5	$	2,959.1	$	9,240.8	$	8,979.3
Excluding:
Net Investment Loss	(31.0)		(4.4)		(30.0)		(22.3)
Adjusted Operating Revenue	$	3,123.5	$	2,963.5	$	9,270.8	$	9,001.6
Income Before Income Tax	$	261.7	$	641.6	$	1,211.4	$	1,376.5
Excluding:
Net Investment Loss	(31.0)		(4.4)		(30.0)		(22.3)
Amortization of the Cost of Reinsurance	(11.1)		(11.8)		(33.1)		(38.5)
Non-Contemporaneous Reinsurance	(9.2)		(1.7)		(26.4)		(24.1)
Reserve Assumption Updates	(177.2)		243.3		(177.2)		243.3
Adjusted Operating Income	$	490.2	$	416.2	$	1,478.1	$	1,218.1