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Schedule III Supplementary Insurance Information
 12 Months Ended
Dec. 31, 2022
SEC Schedule, 12-16, Insurance Companies, Supplementary Insurance Information [Abstract]  
Supplementary Insurance Information, for Insurance Companies Disclosure
SCHEDULE III--SUPPLEMENTARY INSURANCE INFORMATION

Unum Group and Subsidiaries
SegmentDeferred Acquisition CostsReserves for Future Policy Contract BenefitsUnearned PremiumsPolicy and Contract Benefits
(in millions of dollars)
December 31, 2022
Unum US$1,089.4 $9,129.9 $50.5 $1,245.8 
Unum International36.6 2,074.7 130.4 165.2 
Colonial Life1,126.3 2,750.2 35.2 181.5 
Closed Block— 28,375.4 136.6 247.3 
   Total$2,252.3 $42,330.2 $352.7 $1,839.8 
December 31, 2021
Unum US$1,096.2 $10,959.4 $41.5 $1,262.5 
Unum International35.4 2,765.5 131.8 171.2 
Colonial Life1,076.3 2,730.1 36.3 210.3 
Closed Block— 31,552.5 137.9 263.7 
   Total$2,207.9 $48,007.5 $347.5 $1,907.7 
SCHEDULE III--SUPPLEMENTARY INSURANCE INFORMATION (Continued)

Unum Group and Subsidiaries
SegmentPremium Income
Net Investment Income1
Benefits and Change in Reserves for Future Benefits2
Amortization of Deferred Acquisition Costs
All Other Expenses3
Premiums Written4
(in millions of dollars)
December 31, 2022
Unum US$6,258.3 $676.3 $3,941.5 $294.9 $1,768.8 $4,335.7 
Unum International718.8 170.1 564.8 7.6 190.4 504.1 
Colonial Life1,702.0 152.7 803.1 288.5 389.6 1,221.8 
Closed Block944.3 1,070.6 1,627.3 — 261.5 936.8 
Corporate— 52.5 — — 221.6 — 
   Total$9,623.4 $2,122.2 $6,936.7 $591.0 $2,831.9 
December 31, 2021
Unum US$6,078.0 $721.6 $4,338.8 $319.0 $1,631.9 $4,168.9 
Unum International717.0 132.7 556.2 8.0 180.4 520.6 
Colonial Life1,690.2 172.0 910.4 259.1 364.5 1,223.3 
Closed Block995.8 1,159.0 1,793.2 — 284.0 983.0 
Corporate— 27.9 — — 305.3 — 
   Total$9,481.0 $2,213.2 $7,598.6 $586.1 $2,766.1 
December 31, 2020
Unum US$6,018.9 $720.3 $4,138.7 $341.0 $1,589.0 $4,088.6 
Unum International652.8 104.6 500.9 7.4 173.0 456.0 
Colonial Life1,712.0 155.7 906.5 257.7 369.2 1,252.4 
Closed Block994.4 1,370.3 3,426.8 — 240.2 979.3 
Corporate— 9.8 — — 247.7 — 
   Total$9,378.1 $2,360.7 $8,972.9 $606.1 $2,619.1 

1 Net investment income is allocated based upon segmentation. Each segment has its own specifically identified assets and receives the investment income generated by those assets.

2 Included in benefits and change in reserves for future benefits were the following:

•In 2022, a reserve decrease in the Unum US segment related to reserve assumption updates in our Unum US group long-term disability and group life product lines, of $121.0 million and $34.0 million, respectively.
•In 2021, a reserve decrease of $215.0 million in the Unum US segment related to reserve assumption updates in our Unum US group long-term disability product line. Also in 2021, reserve increases in the Closed Block segment related to reserve assumption updates for our long-term care, group pension, and individual disability product lines, of $2.1 million, $25.1 million, and $6.4 million, respectively.
•In 2020, reserve increases in the Closed Block segment related to reserve assumption updates for our long-term care and group pension product lines of $151.5 million and $17.5 million, respectively.
•In 2021 and 2020, an increase in benefits and change in reserves for future benefits of $133.1 million and $1,284.5 million, respectively, resulting from the recognition of the adjustment related to unrealized investment gains and losses previously recognized in accumulated other comprehensive income related to the Closed Block individual disability reinsurance transaction.
SCHEDULE III--SUPPLEMENTARY INSURANCE INFORMATION (Continued)

Unum Group and Subsidiaries

3 Includes commissions, interest and debt expense, deferral of acquisition costs, compensation expense, and other expenses. Where not directly attributable to a segment, expenses are generally allocated based on activity levels, time information, and usage statistics. Also included in all other expenses were the following:
•In 2022, 2021, and 2020 the amortization of the cost of reinsurance of $63.8 million, $79.1 million, and $2.6 million respectively, in the Closed Block segment.
•In 2021, an impairment loss of $12.1 million was recorded in our Corporate segment for previously capitalized internal-use software that we no longer plan to utilize.
•In 2021, costs related to early retirement of debt of $67.3 million in the Corporate segment.
•In 2021 and 2020, transaction costs of $6.2 million and $21.0 million, respectively, related to the Closed Block individual disability reinsurance transaction.
•In 2021 and 2020, a right-of-use asset impairment of $13.9 million and $12.7 million, respectively, related to one of our operating leases for office space that we do not plan to continue using to support general operations in the Corporate segment.
•In 2020, costs related to organizational design updates of $23.3 million in the Corporate segment.

4 Excludes life insurance.