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Schedule III Supplementary Insurance Information
 12 Months Ended
Dec. 31, 2020
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, 2020
Unum US$1,168.7 $11,681.4 $44.0 $1,191.2 
Unum International32.0 2,794.2 123.3 175.6 
Colonial Life1,071.9 2,628.5 36.9 217.2 
Closed Block— 32,548.9 145.1 271.4 
   Total$2,272.6 $49,653.0 $349.3 $1,855.4 
December 31, 2019
Unum US$1,223.0 $11,367.8 $46.0 $1,117.5 
Unum International26.4 2,566.6 129.9 157.3 
Colonial Life1,074.6 2,477.2 36.8 189.4 
Closed Block— 31,368.5 151.2 281.3 
   Total$2,324.0 $47,780.1 $363.9 $1,745.5 
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, 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 
December 31, 2019
Unum US$6,016.6 $739.4 $4,022.1 $344.0 $1,501.6 $4,073.9 
Unum International630.5 122.5 469.8 7.1 168.8 443.7 
Colonial Life1,685.0 148.0 865.0 258.8 368.1 1,249.6 
Closed Block1,033.5 1,404.9 2,139.3 — 232.7 1,020.8 
Corporate— 20.5 — — 239.5 — 
   Total$9,365.6 $2,435.3 $7,496.2 $609.9 $2,510.7 
December 31, 2018
Unum US$5,736.4 $778.7 $3,856.5 $315.1 $1,447.4 $3,873.0 
Unum International568.8 117.2 419.8 8.2 144.5 455.5 
Colonial Life1,603.8 151.2 824.9 242.2 353.9 1,277.3 
Closed Block1,077.1 1,377.1 2,919.2 — 235.7 1,065.7 
Corporate— 29.5 — — 203.3 — 
   Total$8,986.1 $2,453.7 $8,020.4 $565.5 $2,384.8 

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 2020 and 2018 are reserve increases of $151.5 million and $750.8 million, respectively in the Closed Block segment related to our long-term care business, as well as a reserve increase of $17.5 million in 2020 related to our group pension Closed Block business. Also included in 2020 is an increase in benefits and change in reserves for future benefits of $1,284.5 million in 2020 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.

3 Includes commissions, interest and debt expense, cost related to early retirement of debt, 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. Included in 2020 is the amortization of the cost of reinsurance of $2.6 million and transaction costs of $21.0 million related to the Closed Block individual disability reinsurance transaction. Also included in 2020 is a ROU asset impairment of $12.7 million related to one of our operating leases for office space that we do not plan to continue using to support general operations and costs related to organizational design updates of $23.3 million in Corporate.

4 Excludes life insurance.