Segment Information (Tables)

6 Months Ended

Jun. 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 June 30				Six Months Ended June 30
	2023		2022		2023		2022
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	516.1	$	474.4	$	1,020.8	$	938.3
Group Short-term Disability	256.2		232.1		496.5		453.7
Group Life and Accidental Death & Dismemberment
Group Life	418.2		419.6		831.3		832.2
Accidental Death & Dismemberment	43.6		43.8		87.1		85.9
Supplemental and Voluntary
Voluntary Benefits	213.4		214.4		427.9		433.0
Individual Disability	125.8		117.8		250.0		231.4
Dental and Vision	68.1		68.9		137.4		139.5
	1,641.4		1,571.0		3,251.0		3,114.0
Unum International
Unum UK
Group Long-term Disability	104.7		94.3		196.4		197.7
Group Life	41.1		33.3		80.3		65.5
Supplemental	33.5		29.4		65.3		58.4
Unum Poland	28.6		22.4		54.5		45.6
	207.9		179.4		396.5		367.2
Colonial Life
Accident, Sickness, and Disability	235.6		238.2		471.3		477.9
Life	106.6		101.3		211.9		203.0
Cancer and Critical Illness	88.4		88.1		176.9		177.4
	430.6		427.6		860.1		858.3
Closed Block
Long-term Care	174.0		173.7		349.1		348.5
All Other	55.2		64.3		111.7		129.4
	229.2		238.0		460.8		477.9
Total Premium Income	$	2,509.1	$	2,416.0	$	4,968.4	$	4,817.4

Selected Operating Statement Data by Segment

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Three Months Ended June 30, 2023
Premium Income	$	1,641.4	$	207.9	$	430.6	$	229.2	$	—	$	2,509.1
Net Investment Income	158.0		45.8		38.0		263.9		25.4		531.1
Other Income	54.5		0.1		0.4		13.8		2.3		71.1
Adjusted Operating Revenue	$	1,853.9	$	253.8	$	469.0	$	506.9	$	27.7	$	3,111.3
Adjusted Operating Income (Loss)	$	343.1	$	43.5	$	115.5	$	51.2	$	(34.9)	$	518.4
Three Months Ended June 30, 2022
Premium Income	$	1,571.0	$	179.4	$	427.6	$	238.0	$	—	$	2,416.0
Net Investment Income	167.8		50.8		38.7		291.5		10.2		559.0
Other Income	50.7		0.3		0.2		16.5		1.0		68.7
Adjusted Operating Revenue	$	1,789.5	$	230.5	$	466.5	$	546.0	$	11.2	$	3,043.7
Adjusted Operating Income (Loss)	$	291.9	$	28.1	$	96.6	$	86.9	$	(36.9)	$	466.6

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Six Months Ended June 30, 2023
Premium Income	$	3,251.0	$	396.5	$	860.1	$	460.8	$	—	$	4,968.4
Net Investment Income	315.3		76.7		75.3		521.1		51.5		1,039.9
Other Income	108.1		0.5		0.6		27.3		2.5		139.0
Adjusted Operating Revenue	$	3,674.4	$	473.7	$	936.0	$	1,009.2	$	54.0	$	6,147.3
Adjusted Operating Income (Loss)	$	655.6	$	81.9	$	209.4	$	109.4	$	(68.4)	$	987.9
Six Months Ended June 30, 2022
Premium Income	$	3,114.0	$	367.2	$	858.3	$	477.9	$	—	$	4,817.4
Net Investment Income	338.8		85.3		76.8		566.3		19.0		1,086.2
Other Income	97.8		0.5		0.5		32.5		3.2		134.5
Adjusted Operating Revenue	$	3,550.6	$	453.0	$	935.6	$	1,076.7	$	22.2	$	6,038.1
Adjusted Operating Income (Loss)	$	460.2	$	54.0	$	199.5	$	165.5	$	(77.3)	$	801.9

Assets by Segment

	June 30		December 31
	2023		2022
	(in millions of dollars)
Assets
Unum US	$	15,813.2	$	16,356.3
Unum International	3,315.2		3,129.4
Colonial Life	4,674.9		4,575.0
Closed Block	34,309.8		33,776.6
Corporate	3,791.3		3,311.2
Total Assets	$	61,904.4	$	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 June 30				Six Months Ended June 30
	2023		2022		2023		2022
	(in millions of dollars)
Total Revenue	$	3,112.2	$	3,039.6	$	6,148.3	$	6,020.2
Excluding:
Net Investment Gain (Loss)	0.9		(4.1)		1.0		(17.9)
Adjusted Operating Revenue	$	3,111.3	$	3,043.7	$	6,147.3	$	6,038.1
Income Before Income Tax	$	498.4	$	439.2	$	949.7	$	734.9
Excluding:
Net Investment Gain (Loss)	0.9		(4.1)		1.0		(17.9)
Amortization of the Cost of Reinsurance	(11.0)		(13.3)		(22.0)		(26.7)
Non-Contemporaneous Reinsurance	(9.9)		(10.0)		(17.2)		(22.4)
Adjusted Operating Income	$	518.4	$	466.6	$	987.9	$	801.9