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Segment Information (Tables)
 12 Months Ended
Dec. 31, 2025
Segment Reporting [Abstract]  
Premium Income by Major Line of Business within Each Segment
Segment information is shown below.

Year Ended December 31
202520242023
(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability$2,011.1 $2,086.1 $2,057.2 
Group Short-term Disability1,138.4 1,084.0 1,012.3 
Group Life and Accidental Death & Dismemberment
Group Life1,871.1 1,784.7 1,679.0 
Accidental Death & Dismemberment195.6 186.1 175.5 
Supplemental and Voluntary
Voluntary Benefits927.4 879.2 850.1 
Individual Disability615.1 566.0 527.0 
Dental and Vision324.8 297.1 278.1 
7,083.5 6,883.2 6,579.2 
Unum International
Unum UK
Group Long-term Disability427.5 418.0 396.1 
Group Life275.7 211.3 169.3 
Supplemental184.2 165.6 141.5 
Unum Poland195.4 154.6 118.3 
1,082.8 949.5 825.2 
Colonial Life
Accident, Sickness, and Disability993.5 969.5 946.1 
Life483.6 458.0 426.5 
Cancer and Critical Illness362.0 356.4 353.5 
1,839.1 1,783.9 1,726.1 
Closed Block
Long-term Care670.8 696.1 696.0 
All Other154.8 184.7 219.5 
825.6 880.8 915.5 
Total Premium Income$10,831.0 $10,497.4 $10,046.0 
Selected Operating Statement Data by Segment
Year Ended December 31, 2025
Unum USUnum InternationalColonial LifeClosed BlockCorporateTotal
(in millions of dollars)
Premium Income$7,083.5 $1,082.8 $1,839.1 $825.6 $— $10,831.0 
Net Investment Income604.2 145.6 172.6 1,016.5 93.8 2,032.7 
Other Income1
249.8 7.7 1.6 49.9 0.4 309.4 
Adjusted Operating Revenue$7,937.5 $1,236.1 $2,013.3 $1,892.0 $94.2 $13,173.1 
Adjusted Policy Benefits2
$4,353.3 $793.0 $908.1 $1,542.2 $— $7,596.6 
Adjusted Policy Benefits - Remeasurement Loss (Gain)3
(86.2)(20.2)(23.0)90.0 — (39.4)
Commissions794.9 95.7 398.6 66.1 — 1,355.3 
Interest and Debt Expense— — — — 208.8 208.8 
Deferral of Acquisition Costs
(331.7)(22.0)(343.4)— — (697.1)
Amortization of Deferred Acquisition Costs283.3 10.7 233.1 — — 527.1 
Other Segment Items4
1,652.0 226.6 376.3 130.2 57.0 2,442.1 
Adjusted Benefits and Expenses
$6,665.6 $1,083.8 $1,549.7 $1,828.5 $265.8 $11,393.4 
Adjusted Operating Income (Loss)$1,271.9 $152.3 $463.6 $63.5 $(171.6)$1,779.7 
1Excludes the amortization of the deferred gain on reinsurance in the Unum US segment.
2Excludes the impact of non-contemporaneous reinsurance in the Unum US segment and the Closed Block segment.
3Excludes the reserve assumption updates that occurred in the third quarter of 2025 for all segments except Corporate.
4Excludes the amortization of the cost of reinsurance in the Closed Block segment, as well as the accelerated charitable contribution and the settlement loss on the U.S. pension plan annuity purchase in the Corporate segment. For each reportable segment, other segment items includes compensation, other personnel expenses, taxes, licenses and fees, depreciation, intangible asset amortization and other expenses. Depreciation and intangible asset amortization during 2025 was $86.7 million, $20.7 million, $16.9 million, $6.0 million, and $0.5 million for our Unum US, Unum International, Colonial Life, Closed Block and Corporate segments, respectively.
Year Ended December 31, 2024
Unum USUnum InternationalColonial LifeClosed BlockCorporateTotal
(in millions of dollars)
Premium Income$6,883.2 $949.5 $1,783.9 $880.8 $— $10,497.4 
Net Investment Income632.2 128.8 161.5 1,148.9 58.6 2,130.0 
Other Income235.9 1.6 4.0 51.7 1.3 294.5 
Adjusted Operating Revenue$7,751.3 $1,079.9 $1,949.4 $2,081.4 $59.9 $12,921.9 
Adjusted Policy Benefits1
$4,246.5 $693.6 $885.4 $1,629.6 $— $7,455.1 
Adjusted Policy Benefits - Remeasurement Loss (Gain)2
(238.2)(44.4)(34.7)112.4 — (204.9)
Commissions729.3 82.5 378.4 68.4 — 1,258.6 
Interest and Debt Expense— — — — 201.1 201.1 
Deferral of Acquisition Costs(320.9)(17.8)(312.8)— — (651.5)
Amortization of Deferred Acquisition Costs292.5 9.5 219.0 — — 521.0 
Other Segment Items3
1,602.9 198.7 347.4 133.2 50.0 2,332.2 
Adjusted Benefits and Expenses
$6,312.1 $922.1 $1,482.7 $1,943.6 $251.1 $10,911.6 
Adjusted Operating Income (Loss)$1,439.2 $157.8 $466.7 $137.8 $(191.2)$2,010.3 
1Excludes the impact of non-contemporaneous reinsurance in the Closed Block segment.
2Excludes the reserve assumption updates that occurred in the third quarter of 2024 for all segments except Corporate.
3Excludes the amortization of the cost of reinsurance in the Closed Block segment and the loss on legal settlement in the Corporate segment. For each reportable segment, other segment items includes compensation, other personnel expenses, taxes, licenses and fees, depreciation, intangible asset amortization and other expenses. Depreciation and intangible asset amortization during 2024 was $85.0 million, $17.9 million, $15.1 million, $5.4 million and $0.1 million for our Unum US, Unum International, Colonial Life, Closed Block and Corporate segments, respectively.
Year Ended December 31, 2023
Unum USUnum InternationalColonial LifeClosed BlockCorporateTotal
(in millions of dollars)
Premium Income$6,579.2 $825.2 $1,726.1 $915.5 $— $10,046.0 
Net Investment Income639.9 137.2 153.5 1,066.3 99.8 2,096.7 
Other Income220.5 1.6 1.2 52.6 3.3 279.2 
Adjusted Operating Revenue$7,439.6 $964.0 $1,880.8 $2,034.4 $103.1 $12,421.9 
Adjusted Policy Benefits1
$4,221.2 $581.4 $877.1 $1,597.4 $— $7,277.1 
Adjusted Policy Benefits - Remeasurement Loss (Gain)2
(283.9)(19.5)1.7 69.7 — (232.0)
Commissions664.4 72.5 359.4 73.8 — 1,170.1 
Interest and Debt Expense— — — — 194.8 194.8 
Deferral of Acquisition Costs(314.7)(14.6)(302.9)— — (632.2)
Amortization of Deferred Acquisition Costs267.6 8.4 205.4 — — 481.4 
Other Segment Items3
1,529.5 177.7 340.0 128.6 54.7 2,230.5 
Adjusted Benefits and Expenses
$6,084.1 $805.9 $1,480.7 $1,869.5 $249.5 $10,489.7 
Adjusted Operating Income (Loss)
$1,355.5 $158.1 $400.1 $164.9 $(146.4)$1,932.2 
1Excludes the impact of non-contemporaneous reinsurance in the Closed Block segment.
2Excludes the reserve assumption updates that occurred in the third quarter of 2023 for all segments except Corporate.
3Excludes the amortization of the cost of reinsurance in the Closed Block segment. For each reportable segment, other segment items includes compensation, other personnel expenses, taxes, licenses and fees, depreciation, intangible asset amortization and other expenses. Depreciation and intangible asset amortization during 2023 was $76.3 million, $14.6 million, $13.6 million, $5.2 million, and $0.6 million for our Unum US, Unum International, Colonial Life, Closed Block and Corporate segments, respectively.
Assets by Segment
December 31
20252024
(in millions of dollars)
Assets
Unum US$14,635.3 $14,981.6 
Unum International3,648.0 3,291.3 
Colonial Life5,289.9 4,964.2 
Closed Block33,887.8 33,376.0 
Corporate6,058.4 5,346.2 
Total Assets$63,519.4 $61,959.3 
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:
Year Ended December 31
202520242023
(in millions of dollars)
Total Revenue$13,075.5 $12,887.3 $12,385.9 
Excluding:
Net Investment Loss(106.6)(34.6)(36.0)
Amortization of the Deferred Gain on Reinsurance9.0 — — 
Adjusted Operating Revenue$13,173.1 $12,921.9 $12,421.9 
Income Before Income Tax$933.5 $2,251.3 $1,640.1 
Excluding:
Net Investment Loss
Net Investment Loss Related to the Fortitude Re Reinsurance Transaction(46.8)— — 
Net Investment Loss, Other(59.8)(34.6)(36.0)
Total Net Investment Loss
(106.6)(34.6)(36.0)
Amortization of the Cost of Reinsurance(116.7)(41.4)(44.1)
Amortization of the Deferred Gain on Reinsurance9.0 — — 
Non-Contemporaneous Reinsurance
(29.6)(25.1)(34.8)
Reserve Assumption Updates(478.5)357.4 (177.2)
Settlement Loss on the U.S. Pension Plan Annuity Purchase
(103.8)— — 
Accelerated Charitable Contribution(20.0)— — 
Loss on Legal Settlement
— (15.3)— 
Adjusted Operating Income$1,779.7 $2,010.3 $1,932.2