Segment Information (Tables)

9 Months Ended

Sep. 30, 2024

Segment Reporting [Abstract]

Premium Income by Major Line of Business within Each Segment

Segment information is shown below.

	Three Months Ended September 30				Nine Months Ended September 30
	2024		2023		2024		2023
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	522.1	$	518.5	$	1,560.3	$	1,539.3
Group Short-term Disability	271.3		256.5		810.7		753.0
Group Life and Accidental Death & Dismemberment
Group Life	447.8		423.0		1,337.9		1,254.3
Accidental Death & Dismemberment	47.1		44.1		139.3		131.2
Supplemental and Voluntary
Voluntary Benefits	219.3		209.5		665.1		637.4
Individual Disability	140.4		136.7		424.6		386.7
Dental and Vision	75.5		69.4		223.9		206.8
	1,723.5		1,657.7		5,161.8		4,908.7
Unum International
Unum UK
Group Long-term Disability	106.6		101.1		312.4		297.5
Group Life	58.8		44.2		156.3		124.5
Supplemental	41.4		34.6		125.1		99.9
Unum Poland	39.8		30.7		113.3		85.2
	246.6		210.6		707.1		607.1
Colonial Life
Accident, Sickness, and Disability	240.6		236.7		725.5		708.0
Life	113.1		106.2		342.6		318.1
Cancer and Critical Illness	88.2		88.3		266.9		265.2
	441.9		431.2		1,335.0		1,291.3
Closed Block
Long-term Care	173.7		172.1		521.5		521.2
All Other	43.1		54.3		140.9		166.0
	216.8		226.4		662.4		687.2
Total Premium Income	$	2,628.8	$	2,525.9	$	7,866.3	$	7,494.3

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, 2024
Premium Income	$	1,723.5	$	246.6	$	441.9	$	216.8	$	—	$	2,628.8
Net Investment Income	161.0		30.4		39.6		284.3		12.5		527.8
Other Income	60.1		0.4		0.4		12.4		—		73.3
Adjusted Operating Revenue	$	1,944.6	$	277.4	$	481.9	$	513.5	$	12.5	$	3,229.9
Adjusted Operating Income (Loss)	$	363.3	$	40.3	$	113.4	$	34.2	$	(49.4)	$	501.8
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

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Nine Months Ended September 30, 2024
Premium Income	$	5,161.8	$	707.1	$	1,335.0	$	662.4	$	—	$	7,866.3
Net Investment Income	476.1		94.5		119.4		851.6		44.8		1,586.4
Other Income	178.9		1.2		3.6		37.7		1.1		222.5
Adjusted Operating Revenue	$	5,816.8	$	802.8	$	1,458.0	$	1,551.7	$	45.9	$	9,675.2
Adjusted Operating Income (Loss)	$	1,106.0	$	120.2	$	344.0	$	110.1	$	(140.8)	$	1,539.5
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

Assets by Segment

	September 30		December 31
	2024		2023
	(in millions of dollars)
Assets
Unum US	$	15,365.4	$	15,561.1
Unum International	3,569.4		3,372.9
Colonial Life	4,994.2		4,830.4
Closed Block	35,527.4		35,272.8
Corporate	4,684.1		4,218.0
Total Assets	$	64,140.5	$	63,255.2

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
	2024		2023		2024		2023
	(in millions of dollars)
Total Revenue	$	3,217.0	$	3,092.5	$	9,650.7	$	9,240.8
Excluding:
Net Investment Loss	(12.9)		(31.0)		(24.5)		(30.0)
Adjusted Operating Revenue	$	3,229.9	$	3,123.5	$	9,675.2	$	9,270.8
Income Before Income Tax	$	814.6	$	261.7	$	1,805.8	$	1,211.4
Excluding:
Net Investment Loss	(12.9)		(31.0)		(24.5)		(30.0)
Amortization of the Cost of Reinsurance	(10.4)		(11.1)		(31.1)		(33.1)
Non-Contemporaneous Reinsurance	(6.0)		(9.2)		(20.2)		(26.4)
Reserve Assumption Updates	357.4		(177.2)		357.4		(177.2)
Loss on Legal Settlement	(15.3)		—		(15.3)		—
Adjusted Operating Income	$	501.8	$	490.2	$	1,539.5	$	1,478.1