Segment Information (Tables)

3 Months Ended

Mar. 31, 2020

Segment Reporting [Abstract]

Premium Income by Major Line of Business within Each Segment

Segment information is as follows:

Certain prior year amounts were reclassified to conform to current year presentation.

	Three Months Ended March 31
	2020		2019
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	463.0	$	452.9
Group Short-term Disability	203.2		188.7
Group Life and Accidental Death & Dismemberment
Group Life	414.5		414.4
Accidental Death & Dismemberment	41.7		41.0
Supplemental and Voluntary
Individual Disability	109.5		110.7
Voluntary Benefits	230.4		234.4
Dental and Vision	65.4		59.8
	1,527.7		1,501.9
Unum International
Unum UK
Group Long-term Disability	90.8		87.9
Group Life	30.9		27.2
Supplemental	23.9		21.7
Unum Poland	19.0		17.2
	164.6		154.0
Colonial Life
Accident, Sickness, and Disability	249.3		242.2
Life	93.8		87.6
Cancer and Critical Illness	91.6		89.5
	434.7		419.3
Closed Block
Long-term Care	164.8		163.0
Individual Disability	77.0		98.1
All Other	2.6		2.4
	244.4		263.5
Total Premium Income	$	2,371.4	$	2,338.7

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, 2020
Premium Income	$	1,527.7	$	164.6	$	434.7	$	244.4	$	—	$	2,371.4
Net Investment Income	179.6		26.5		37.7		336.1		5.1		585.0
Other Income	40.2		—		0.3		18.2		—		58.7
Adjusted Operating Revenue	$	1,747.5	$	191.1	$	472.7	$	598.7	$	5.1	$	3,015.1
Adjusted Operating Income (Loss)	$	261.8	$	19.4	$	81.1	$	29.7	$	(45.9)	$	346.1
Three Months Ended March 31, 2019
Premium Income	$	1,501.9	$	154.0	$	419.3	$	263.5	$	—	$	2,338.7
Net Investment Income	182.1		24.8		36.9		346.6		4.3		594.7
Other Income	34.5		—		0.6		18.0		—		53.1
Adjusted Operating Revenue	$	1,718.5	$	178.8	$	456.8	$	628.1	$	4.3	$	2,986.5
Adjusted Operating Income (Loss)	$	252.3	$	29.1	$	85.2	$	31.0	$	(45.4)	$	352.2

Assets by Segment

	March 31		December 31
	2020		2019
	(in millions of dollars)
Assets
Unum US	$	17,791.5	$	18,586.3
Unum International	3,515.1		3,869.1
Colonial Life	4,428.0		4,629.0
Closed Block	36,004.3		37,008.7
Corporate	3,597.0		2,920.3
Total Assets	$	65,335.9	$	67,013.4

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
	2020		2019
	(in millions of dollars)
Total Revenue	$	2,871.1	$	2,987.6
Excluding:
Net Realized Investment Gain (Loss)	(144.0)		1.1
Adjusted Operating Revenue	$	3,015.1	$	2,986.5
Income Before Income Tax	$	202.1	$	353.3
Excluding:
Net Realized Investment Gain (Loss)	(144.0)		1.1
Adjusted Operating Income	$	346.1	$	352.2