Segment Information (Tables)

3 Months Ended

Mar. 31, 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 March 31
	2023		2022
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	504.7	$	463.9
Group Short-term Disability	240.3		221.6
Group Life and Accidental Death & Dismemberment
Group Life	413.1		412.6
Accidental Death & Dismemberment	43.5		42.1
Supplemental and Voluntary
Voluntary Benefits	214.5		218.6
Individual Disability	124.2		113.6
Dental and Vision	69.3		70.6
	1,609.6		1,543.0
Unum International
Unum UK
Group Long-term Disability	91.7		103.4
Group Life	39.2		32.2
Supplemental	31.8		29.0
Unum Poland	25.9		23.2
	188.6		187.8
Colonial Life
Accident, Sickness, and Disability	235.7		239.7
Life	105.3		101.7
Cancer and Critical Illness	88.5		89.3
	429.5		430.7
Closed Block
Long-term Care	175.1		174.8
All Other	56.5		65.1
	231.6		239.9
Total Premium Income	$	2,459.3	$	2,401.4

Selected Operating Statement Data by Segment

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Three Months Ended March 31, 2023
Premium Income	$	1,609.6	$	188.6	$	429.5	$	231.6	$	—	$	2,459.3
Net Investment Income	157.3		30.9		37.3		257.2		26.1		508.8
Other Income	53.6		0.4		0.2		13.5		0.2		67.9
Adjusted Operating Revenue	$	1,820.5	$	219.9	$	467.0	$	502.3	$	26.3	$	3,036.0
Adjusted Operating Income (Loss)	$	312.5	$	38.4	$	93.9	$	58.2	$	(33.5)	$	469.5
Three Months Ended March 31, 2022
Premium Income	$	1,543.0	$	187.8	$	430.7	$	239.9	$	—	$	2,401.4
Net Investment Income	171.0		34.5		38.1		274.8		8.8		527.2
Other Income	47.1		0.2		0.3		16.0		2.2		65.8
Adjusted Operating Revenue	$	1,761.1	$	222.5	$	469.1	$	530.7	$	11.0	$	2,994.4
Adjusted Operating Income (Loss)	$	168.3	$	25.9	$	102.9	$	78.6	$	(40.4)	$	335.3

Assets by Segment

	March 31		December 31
	2023		2022
	(in millions of dollars)
Assets
Unum US	$	16,085.8	$	16,356.3
Unum International	3,237.7		3,129.4
Colonial Life	4,678.8		4,575.0
Closed Block	34,472.5		33,776.6
Corporate	3,949.0		3,311.2
Total Assets	$	62,423.8	$	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 March 31
	2023		2022
	(in millions of dollars)
Total Revenue	$	3,036.1	$	2,980.6
Excluding:
Net Investment Gain (Loss)	0.1		(13.8)
Adjusted Operating Revenue	$	3,036.0	$	2,994.4
Income Before Income Tax	$	451.3	$	295.7
Excluding:
Net Investment Gain (Loss)	0.1		(13.8)
Amortization of the Cost of Reinsurance	(11.0)		(13.4)
Non-Contemporaneous Reinsurance	(7.3)		(12.4)
Adjusted Operating Income	$	469.5	$	335.3