10-K

UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D. C. 20549

FORM 10-K

(Mark One)

☒ Annual Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the fiscal year ended December 31, 2022

☐ Transition Report Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934

For the transition period from to

Commission file number 001-11294

Unum Group

(Exact name of registrant as specified in its charter)

Delaware	62-1598430
(State or other jurisdiction of incorporation or organization)	(I.R.S. Employer Identification No.)
1 Fountain Square Chattanooga, Tennessee	37402
(Address of principal executive offices)	(Zip Code)
(423)294-1011
(Registrant's telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Title of each class	Trading Symbol(s)	Name of each exchange on which registered
Common stock, $0.10 par value	UNM	New York Stock Exchange
6.250% Junior Subordinated Notes due 2058	UNMA	New York Stock Exchange

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer as defined in Rule 405 of the Securities Act. Yes [X] No [ ]

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15(d) of the Act. Yes [ ] No [X]

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. Yes [X] No [ ]

Indicate by check mark whether the registrant has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes [X] No [ ]

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, smaller reporting company, or an emerging growth company. See the definitions of “large accelerated filer,” “accelerated filer,” “smaller reporting company,” and "emerging growth company" in Rule 12b-2 of the Exchange Act.

(Check one):

Large Accelerated Filer	x	Accelerated filer	☐
Non-accelerated filer	¨	Smaller reporting company	☐
		Emerging growth company	☐
If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.			☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.             ☒

If securities are registered pursuant to Section 12(b) of the Act, indicate by check mark whether the financial statements of the registrant included in the filing reflect the correction of an error to previously issued financial statements. ☐

Indicate by check mark whether any of those error corrections are restatements that required a recovery analysis of incentive-based compensation received by any of the registrant’s executive officers during the relevant recovery period pursuant to §240.10D-1(b). ☐

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐ No ☒

The aggregate market value of the shares of the registrant's common stock held by non-affiliates (based upon the closing price of these shares on the New York Stock Exchange) as of the last business day of the registrant's most recently completed second fiscal quarter was $6.8 billion. As of February 21, 2023, there were 197,294,182 shares of the registrant's common stock outstanding.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the information required by Part III of this Form 10-K are incorporated herein by reference from the registrant's definitive proxy statement for its 2023 Annual Meeting of Stockholders which will be filed with the Securities and Exchange Commission pursuant to Regulation 14A under the Securities Exchange Act of 1934, as amended, within 120 days after the end of the registrant's fiscal year ended December 31, 2022.

 TABLE OF CONTENTS

		Page
	Cautionary Statement Regarding Forward-Looking Statements	1
	PART I
Item 1.	Business	3
Item 1A.	Risk Factors	22
Item 1B.	Unresolved Staff Comments	35
Item 2.	Properties	35
Item 3.	Legal Proceedings	35
Item 4.	Mine Safety Disclosures	35
	PART II
Item 5.	Market for the Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities	36
Item 6.	[Reserved]	36
Item 7.	Management's Discussion and Analysis of Financial Condition and Results of Operations	37
Item 7A.	Quantitative and Qualitative Disclosures About Market Risk	100
Item 8.	Financial Statements and Supplementary Data	106
Item 9.	Changes in and Disagreements with Accountants on Accounting and Financial Disclosure	207
Item 9A.	Controls and Procedures	207
Item 9B.	Other Information	209
Item 9C.	Disclosure Regarding Foreign Jurisdictions that Prevent Inspections	209
	PART III
Item 10.	Directors, Executive Officers, and Corporate Governance	210
Item 11.	Executive Compensation	210
Item 12.	Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters	211
Item 13.	Certain Relationships and Related Transactions and Director Independence	212
Item 14.	Principal Accounting Fees and Services	212
	PART IV
Item 15.	Exhibits and Financial Statement Schedules	213
	Index to Exhibits	223
	Signatures	227

Cautionary Statement Regarding Forward-Looking Statements

The Private Securities Litigation Reform Act of 1995 (the Act) provides a "safe harbor" to encourage companies to provide prospective information, as long as those statements are identified as forward-looking and are accompanied by meaningful cautionary statements identifying important factors that could cause actual results to differ materially from those included in the forward-looking statements. Certain information contained in this Annual Report on Form 10-K (including certain statements in the business description in Item 1, Management's Discussion and Analysis in Item 7, and the consolidated financial statements and related notes in Item 8), or in any other written or oral statements made by us in communications with the financial community or contained in documents filed with the Securities and Exchange Commission (SEC), may be considered forward-looking statements within the meaning of the Act. Forward-looking statements are those not based on historical information, but rather relate to our outlook, future operations, strategies, financial results, or other developments. Forward-looking statements speak only as of the date made. We undertake no obligation to update these statements, even if made available on our website or otherwise. These statements may be made directly in this document or may be made part of this document by reference to other documents filed by us with the SEC, a practice which is known as "incorporation by reference." You can find many of these statements by looking for words such as "will," "may," "should," "could," "believes," "expects," "anticipates," "estimates," "plans," "assumes," "intends," "projects," "goals,” "objectives," or similar expressions in this document or in documents incorporated herein.

These forward-looking statements are subject to numerous assumptions, risks, and uncertainties, many of which are beyond our control. We caution readers that the following factors, in addition to other factors mentioned from time to time, may cause actual results to differ materially from those contemplated by the forward-looking statements:

•Fluctuation in insurance reserve liabilities and claim payments due to changes in claim incidence, recovery rates, mortality and morbidity rates, and policy benefit offsets due to, among other factors, the rate of unemployment and consumer confidence, the emergence of new diseases, epidemics, or pandemics, new trends and developments in medical treatments, the effectiveness of our claims operational processes, and changes in governmental programs.

•Sustained periods of low interest rates.

•Unfavorable economic or business conditions, both domestic and foreign, that may result in decreases in sales, premiums, or persistency, as well as unfavorable claims activity or unfavorable returns on our investment portfolio.

•The impact of pandemics and other public health issues, including COVID-19, on our business, financial position, results of operations, liquidity and capital resources, and overall business operations.

•Changes in, or interpretations or enforcement of, laws and regulations.

•Our ability to hire and retain qualified employees.

•A cyber attack or other security breach could result in the unauthorized acquisition of confidential data.

•The failure of our business recovery and incident management processes to resume our business operations in the event of a natural catastrophe, cyber attack, or other event.

•Investment results, including, but not limited to, changes in interest rates, defaults, changes in credit spreads, impairments, and the lack of appropriate investments in the market which can be acquired to match our liabilities.

•Increased competition from other insurers and financial services companies due to industry consolidation, new entrants to our markets, or other factors.

•Changes in our financial strength and credit ratings.

•Our ability to develop digital capabilities or execute on our technology systems upgrades or replacements.

•Actual experience in the broad array of our products that deviates from our assumptions used in pricing, underwriting, and reserving.

•Ineffectiveness of our derivatives hedging programs due to changes in forecasted cash flows, the economic environment, counterparty risk, ratings downgrades, capital market volatility, changes in interest rates, and/or regulation.

•Availability of reinsurance in the market and the ability of our reinsurers to meet their obligations to us.

•Ability to generate sufficient internal liquidity and/or obtain external financing.

•Damage to our reputation due to, among other factors, regulatory investigations, legal proceedings, external events, and/or inadequate or failed internal controls and procedures.

•The use and reliance on third-party vendors, including vendors providing web and cloud-based applications, may disrupt our business, and impact our ability to leverage data.

•Recoverability and/or realization of the carrying value of our intangible assets, long-lived assets, and deferred tax assets.

•Effectiveness of our risk management program.

•Contingencies and the level and results of litigation.

•Fluctuation in foreign currency exchange rates.

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•Our ability to meet environment, social, and governance standards and expectations of investors, regulators, customers, and other stakeholders.

All subsequent written and oral forward-looking statements attributable to us or any person acting on our behalf are expressly qualified in their entirety by the cautionary statements contained or referred to in this section.

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PART I

ITEM 1. BUSINESS

General

Unum Group, a Delaware general business corporation, and its insurance and non-insurance subsidiaries, which collectively with Unum Group we refer to as the Company, operate in the United States, the United Kingdom, Poland, and, to a limited extent, in certain other countries. The principal operating subsidiaries in the United States are Unum Life Insurance Company of America (Unum America), Provident Life and Accident Insurance Company (Provident), The Paul Revere Life Insurance Company (Paul Revere Life), Colonial Life & Accident Insurance Company, Starmount Life Insurance Company (Starmount Life), in the United Kingdom, Unum Limited, and in Poland, Unum Zycie TUiR S.A. (Unum Poland). We are a leading provider of financial protection benefits in the United States and the United Kingdom. Our products include disability, life, accident, critical illness, dental and vision, and other related services. We market our products primarily through the workplace.

We have three principal operating business segments: Unum US, Unum International, and Colonial Life. Our other segments are the Closed Block and Corporate segments. These segments are discussed more fully under "Reporting Segments" included herein in this Item 1.

Business Strategies

The benefits we provide help the working world thrive throughout life's moments and protect people from the financial hardship of illness, injury, or loss of life. As a leading provider of employee benefits, we offer a broad portfolio of products and services through the workplace that provide support when it is needed most.

Specifically, we offer group, individual, voluntary, and dental and vision products as well as provide certain fee-based services. These products and services, which can be sold stand-alone or combined with other coverages, help employers of all sizes attract and retain the talented and capable workforce they need to succeed while protecting the incomes and livelihood of their employees. We believe employer-sponsored benefits are the most effective way to provide workers with access to information and options to protect their financial stability. Working people and their families, particularly those at lower and middle incomes, are perhaps the most vulnerable in today's economy yet are often overlooked by many providers of financial products and services. For many of these people, employer-sponsored benefits are the primary defense against the potentially catastrophic fallout of death, illness, or injury.

We have established a corporate culture consistent with the social values our products provide. Because we see important links between the obligations we have to all of our stakeholders, we place a strong emphasis on operating with integrity and contributing to positive change in our communities. Accordingly, we are committed not only to meeting the needs of our customers who depend on us, but also to being accountable for our actions through sound and consistent business practices, a strong internal compliance program, a comprehensive risk management strategy, and an engaged employee workforce.

We believe our disciplined approach to providing financial protection products at the workplace puts us in a position of strength. The products and services we provide have never been more important to employers, employees, and their families. Our strategy remains centered on growing our core businesses through investing and transforming our operations and technology to anticipate and respond to the changing needs of our customers, expanding into new adjacent markets through meaningful partnerships and effective deployment of our capital across our portfolio.

We continue to analyze and employ strategies we believe will help us navigate the current environment and allow us to maintain financial flexibility to support the needs of our businesses while also allowing us to return capital to our shareholders. As we have seen in the current environment, we have substantial leverage to rising inflation and strong labor markets which generate wage and payroll growth. To the extent that our own costs increase as a result of wage inflation, we have the ability to adjust our prices on new and renewing business to reflect the higher costs.

Long-term, we believe that consistent operating results, combined with the implementation of strategic initiatives and the effective deployment of capital, will allow us to meet our financial objectives.

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Reporting Segments

Our reporting segments are comprised of the following: Unum US, Unum International, Colonial Life, Closed Block, and Corporate. The percentage of consolidated premium income generated by each reporting segment for the year ended December 31, 2022 is as follows:

Unum US	65.0	%
Unum International	7.5
Colonial Life	17.7
Closed Block	9.8
Total	100.0	%

Financial information is provided in "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7 and Note 13 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Unum US Segment

Our Unum US segment is comprised of group disability, group life and accidental death and dismemberment, and supplemental and voluntary lines of business. The group disability line of business includes long-term and short-term disability, medical stop-loss, and fee-based service products. The supplemental and voluntary line of business includes individual disability, voluntary benefits, and dental and vision products. Unum US products are issued primarily by Unum America, Provident, and Starmount Life. These products are marketed through our field sales personnel who work in conjunction with independent brokers and consultants. Our market strategy for Unum US is to effectively deliver an integrated offering of employee benefit products in the group core market segment, which we define for Unum US as employee groups with fewer than 2,000 employees, the group large case market segment, and the supplemental and voluntary market segment.

The percentage of Unum US segment premium income generated by each product line during 2022 is as follows:

Group Disability	45.4	%
Group Life and Accidental Death & Dismemberment	29.4
Individual Disability	7.4
Voluntary Benefits	13.4
Dental and Vision	4.4
Total	100.0	%

Group Long-term and Short-term Disability

We sell group long-term and short-term disability products to employers for the benefit of employees.

Group long-term disability provides employees with insurance coverage for loss of income in the event of extended work absences due to sickness or injury. We offer services to employers and insureds to encourage and facilitate rehabilitation, retraining, and re-employment. Most policies begin providing benefits following 90 or 180 day waiting periods and continue providing benefits until the employee reaches a certain age, generally between 65 and 70, or recovers from the disability. The benefits are limited to specified maximums as a percentage of income. Also included in our long-term disability product line is our medical stop-loss product, which is designed to protect self-insured employers if their employees' medical claims exceed certain agreed upon thresholds.

Group short-term disability insurance generally provides coverage from loss of income due to injury or sickness for up to 26 weeks and is limited to specified maximums as a percentage of income. Benefits are typically effective after 0 to 30 days for accidents and after 7 to 30 days for sickness.

Our fee-based services include leave management and administrative services only (ASO) business. Leave management services provide administrative services on behalf of employers to ensure the protected leave eligibility and status for employees are in accordance with applicable laws and regulations. ASO products provide administrative services regarding

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claims processing and billing for self-insured customers for which the responsibility for funding claim payments remain with the customer.

Premiums for group long-term and short-term disability are generally based on expected claims of a pool of similar risks plus provisions for administrative expenses, investment income, and profit. In some cases, coverage for large employers will include retrospective experience rating provisions or will be underwritten on an experience-rated basis. Premiums for experience-rated group long-term and short-term disability business are based on the expected experience of the client given its demographics, industry group, and location, adjusted for the credibility of the specific claim experience of the client. Both group long-term and short-term disability are sold primarily on a basis permitting periodic repricing to address the underlying claims experience. Fees for our leave management services and ASO business are generally based on the number of covered employees and an agreed-upon per-employee, per-month rate. Premiums for our medical stop-loss product are generally based on the number of covered employees in self-insured employer groups and their estimated overall health risk plus provisions for administrative expenses, and profit.

We have defined underwriting practices and procedures. If the coverage amount for our disability policies exceeds certain prescribed age and amount limits, we may require a prospective insured to submit evidence of insurability. Our disability policies are typically issued, both at inception and renewal, with rate guarantees. For new group policyholders, the usual rate guarantee is one to three years. For group policies being renewed, the rate guarantee is generally one year, but may be longer. The profitability of the policy depends on the adequacy of the rate during the rate guarantee period. The contracts provide for certain circumstances in which the rate guarantees can be overridden. Our medical stop loss contracts are renewable on an annual basis and rates are not guaranteed beyond one year. There is no requirement for prospective medical stop loss insureds to submit evidence of insurability because coverage levels are determined for the group as a whole.

Profitability of group long-term and short-term disability insurance and our medical stop-loss product is affected by sales, persistency, investment returns, claims experience, and the level of administrative expenses. Morbidity is an important factor in disability claims experience, and many economic and societal factors can affect claim incidence for disability insurance. We routinely make pricing adjustments on our group long-term and short-term disability insurance products, when contractually permitted, which take into account emerging experience and external factors.

Group Life and Accidental Death and Dismemberment

Group life and accidental death and dismemberment products are sold to employers as employee benefit products. Group life consists primarily of renewable term life insurance with the coverages frequently linked to employees' wages and includes a provision for waiver of premium, if disabled. Accidental death and dismemberment consists primarily of an additional benefit amount payable if death or severe injury is attributable to an accident.

Premiums are generally based on expected claims of a pool of similar risks plus provisions for administrative expenses, investment income, and profit. Underwriting practices and rate guarantees are similar to those used for group disability products, and evidence of insurability is required for benefits in excess of a specified limit.

Profitability of group life and accidental death and dismemberment insurance is affected by persistency, investment returns, mortality and other claims experience, and the level of administrative expenses.

Individual Disability

Individual disability products are offered primarily to multi-life employer groups to supplement their group disability plans and may be funded by the employer, but the policy is owned by the employee and is portable. Individual disability insurance provides the insured with a portion of earned income lost as a result of sickness or injury. The benefits, including the underlying group disability coverage, typically range from 30 percent to 75 percent of the insured's monthly earned income. We provide various options with respect to length of benefit periods, product features, and waiting periods before benefit payments begin, which permit tailoring of the multi-life plan to a specific employer's needs. We also market individual disability policies which include payments for the transfer of business ownership between partners and payments for business overhead expenses, also on a multi-life basis. Individual disability products do not provide for the accumulation of cash values.

Premium rates for individual disability products vary by age, product features, industry, region, and occupation based on assumptions concerning morbidity, mortality, persistency, administrative expenses, investment income, and profit. We develop our assumptions based on our own experience. Our underwriting rules, issue limits, and plan designs reflect risk and the financial circumstances of prospective insureds. Individuals in multi-life groups may be subject to limited medical

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underwriting. The majority of our individual disability policies are written on a noncancelable basis. Under a noncancelable policy, as long as the insured continues to pay the fixed annual premium for the policy's duration, we cannot cancel the policy or change the premium.

Profitability of individual disability insurance is affected by persistency, investment returns, claims experience, and the level of administrative expenses.

Voluntary Benefits

Voluntary benefits products are primarily sold to groups of employees through payroll deduction at the workplace and include accident, disability, life, hospital indemnity, cancer, and critical illness. Products are issued on both a group and individual basis.

Premiums are generally based on assumptions for morbidity, mortality, persistency, administrative expenses, investment income, and profit. We develop our assumptions based on our own experience and published industry tables. Our underwriters evaluate the medical condition of prospective policyholders prior to the issuance of a policy on a simplified basis. Underwriting requirements may be waived for cases that meet certain criteria, including participation levels. Individual voluntary benefits products other than life insurance are offered on a guaranteed renewable basis which allows us to reprice in-force policies, subject to regulatory approval. Group voluntary benefits products are offered primarily on an optionally renewable basis which allows us to reprice or terminate in-force policies.

Profitability of voluntary benefits products is affected by the level of employee participation, persistency, investment returns, mortality and other claims experience, and the level of administrative expenses.

Dental and Vision

Group dental and vision products are sold to employers as employee benefit products. Our group dental products include a variety of insured and self-insured dental care plans including preferred provider organizations and scheduled reimbursement plans. Our group vision products provide coverage that includes a range of both in-network and out-of-network benefits for routine vision services offered either in conjunction with our dental product offerings or as stand-alone coverage.

Premiums for small case group dental and vision products are generally based on expected claims of a pool of similar risks plus a provision for administrative expenses, investment income, and profit. Premiums for large employer groups are underwritten on an experience-rated basis.

Profitability of our dental and vision products is affected by persistency, claims experience, the level of administrative expenses, and to a lesser extent, investment returns.

Unum International Segment

Our Unum International segment includes our operations in the United Kingdom and Poland. Unum UK's business includes insurance for group long-term disability, group life, and supplemental lines of business which include dental, individual disability, and critical illness products. Unum Poland's business primarily includes insurance for individual and group life with accident and health riders. Unum International's products are sold primarily through field sales personnel and independent brokers and consultants. The market strategy for the segment is to offer benefits to employers and employees through the workplace, with a focus on the expansion of the number of employers and employees covered in our Unum UK business, and the growth of the existing Unum Poland business through the incorporation of our benefits and distribution expertise.

The percentage of Unum International segment premium income generated by each product line during 2022 is as follows:

Unum UK
Group Long-term Disability	52.4	%
Group Life	19.2
Supplemental	15.9
Unum Poland	12.5
Total	100.0	%

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Unum UK Group Long-term Disability

Group long-term disability products are sold to employers for the benefit of employees. Group long-term disability provides employees with insurance coverage for loss of income in the event of extended work absences due to sickness or injury. Services are offered to employers and insureds to encourage and facilitate rehabilitation, retraining, and re-employment. Most policies begin providing benefits following 90 or 180 day waiting periods and continue providing benefits until the employee reaches a certain age or reaches the end of the limited period specified in the policy terms. The benefits are limited to specified maximums as a percentage of income.

Premiums for group long-term disability are generally based on expected claims of a pool of similar risks plus provisions for administrative expenses, investment income, and profit. Some cases carry experience rating provisions. Premiums for experience-rated group long-term disability business are based on the expected experience of the client given its demographics, industry group, and location, adjusted for the credibility of the specific claim experience of the client. Policies are sold primarily on a basis permitting periodic repricing to address the underlying claims experience.

We have defined underwriting practices and procedures.  If the coverage amount exceeds certain prescribed age and amount limits, we may require a prospective insured to submit evidence of insurability. Policies are typically issued, both at inception and renewal, with rate guarantees. The usual rate guarantee is two years, but may vary depending on circumstances.  The profitability of the policy is dependent upon the adequacy of the rate during the rate guarantee period. The contracts provide for certain circumstances in which the rate guarantees can be overridden.

Profitability of group long-term disability insurance is affected by sales, persistency, investment returns, claims experience, and the level of administrative expenses. Morbidity is an important factor in disability claims experience. We routinely make pricing adjustments on our group insurance products, when contractually permitted, which take into account emerging experience and external factors.

Unum UK Group Life

Group life products are sold to employers as employee benefit products. Group life consists of two types of products, a renewable term life insurance product and a group dependent life product. The renewable term life product provides a lump sum benefit to the beneficiary upon the death of an employee. The group dependent life product, which we discontinued offering to new customers in 2012, provides an annuity to the beneficiary upon the death of an employee. Both coverages are frequently linked to employees' wages. Premiums for group life are generally based on expected claims of a pool of similar risks plus provisions for administrative expenses, investment income, and profit. Underwriting and rate guarantees are similar to those utilized for Unum UK group long-term disability products.

Profitability of group life is affected by sales, persistency, investment returns, mortality and other claims experience, and the level of administrative expenses.    

Unum UK Supplemental

Supplemental products are sold to groups of employees and include group critical illness and group dental products. Group critical illness products provide a lump-sum benefit on the occurrence of a covered critical illness event. Group dental products generally provide fixed benefits based on specified treatments or a portion of the cost of the treatment. Beginning in 2022, supplemental products are no longer actively marketed to individual customers.

Premiums for group critical illness products are generally based on expected claims of a pool of similar risks plus provisions for administrative expenses, investment income, and profit. Underwriting and rate guarantees are similar to those utilized for Unum UK group long-term disability products. Premiums for group dental products are generally based on standard industry rates that vary by age, with minor pricing variation based on the number of covered employees in the group. Profitability of our supplemental products is affected by persistency, investment returns, claims experience, and the level of administrative expenses.

Unum Poland

Unum Poland products, which include both individual and group life products, provide renewable term and whole life insurance with accident and health riders. Premiums are based on expected claims of a pool of similar risks plus provisions for

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administrative expenses, investment income, and profit. Profitability of our Unum Poland products is affected by persistency, investment returns, mortality and other claims experience, and the level of administrative expenses.

Colonial Life Segment

Our Colonial Life segment includes accident, sickness, and disability products, life products, and cancer and critical illness products. Products are issued primarily by Colonial Life & Accident Insurance Company and marketed to employees, on both a group and an individual basis, at the workplace through an independent contractor agent sales force and brokers. Our market strategy for Colonial Life is to effectively deliver a broad set of voluntary products and services in the public sector market and in the commercial market, with a particular focus on the core commercial market segment, which we define for Colonial Life as accounts with fewer than 1,000 employees.

Our underwriters evaluate the medical condition of prospective policyholders prior to the issuance of a policy on a simplified basis. Underwriting requirements may be waived for cases that meet certain criteria, including participation levels.

The percentage of Colonial Life segment premium income generated by each product line during 2022 is as follows:

Accident, Sickness, and Disability	55.8	%
Life	23.5
Cancer and Critical Illness	20.7
Total	100.0	%

Accident, Sickness, and Disability

The accident, sickness, and disability product line consists of short-term disability plans, accident-only plans providing benefits for injuries on a specified loss basis, and our dental and vision products. It also includes accident and health plans which cover events such as hospital admissions, confinement, and surgeries.

Premiums are generally based on assumptions for morbidity, mortality, persistency, administrative expenses, investment income, and profit. We develop our assumptions based on our own experience and published industry tables. Premiums are primarily individual guaranteed renewable which allows us to change premiums on a state by state basis. A small percentage of the policies are written on a group basis which are offered primarily on an optionally renewable basis which allows us to reprice or terminate in-force policies. Premiums for our dental and vision products are guaranteed renewable with standard industry rates that vary by age and region.

Profitability is affected by the level of employee participation, persistency, investment returns, claims experience, and the level of administrative expenses.

Life

Life products are primarily comprised of universal life, whole life, and term life policies.

Premiums are generally based on assumptions for mortality, persistency, administrative expenses, investment income, and profit. We develop our assumptions based on our own experience and published industry tables. Premiums for the individual whole life and term life products are guaranteed for the life of the contract. Premiums for the individual universal life products are flexible and may vary at the individual policyholder level. For the group term life products, we retain the right to change premiums at the account level based on the experience of the account.

Profitability is affected by the level of employee participation, persistency, investment returns, mortality and other claims experience, and the level of administrative expenses.

Cancer and Critical Illness

Cancer policies provide various benefits for the treatment of cancer including hospitalization, surgery, radiation, and chemotherapy. Critical illness policies provide a lump-sum benefit and/or fixed payments on the occurrence of a covered critical illness event.

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Premiums are generally based on assumptions for morbidity, mortality, persistency, administrative expenses, investment income, and profit. We develop our assumptions based on our own experience and published industry tables. Premiums are primarily individual guaranteed renewable wherein we have the ability to change premiums on a state by state basis. A small percentage of the policies are written on a group basis and are offered primarily on an optionally renewable basis which allows us to reprice or terminate in-force policies.

Profitability of these products is affected by the level of employee participation, persistency, investment returns, mortality and other claims experience, and the level of administrative expenses.

Closed Block Segment

Our Closed Block segment consists of group and individual long-term care and other insurance products no longer actively marketed. Closed Block segment premium income for 2022 was comprised of approximately 74 percent group and individual long-term care and 26 percent other insurance products.

Group and Individual Long-term Care

We discontinued offering individual long-term care in 2009 and group long-term care in 2012. Group long-term care was previously offered to employers for the benefit of employees. Individual long-term care was previously marketed on a single-life customer basis.

Long-term care insurance pays a benefit upon the loss of two or more activities of daily living and the insured's requirement of standby assistance or cognitive impairment. Payment is generally made on an indemnity basis, regardless of expenses incurred, up to a lifetime maximum. Benefits begin after a waiting period, usually 90 days or less, and are generally paid for a period of three years, six years, or lifetime.

Our long-term care insurance was sold on a guaranteed renewable basis which allows us to reprice in-force policies, subject to regulatory approval. Premium rates for long-term care vary by age and are based on assumptions concerning morbidity, mortality, persistency, administrative expenses, investment income, and profit. Premium rate increases continue to be implemented where needed and where approved by state regulators. We develop our assumptions based on our own claims and persistency experience and published industry tables.

Profitability is affected by premium rate increases, persistency, investment returns, mortality and other claims experience, and the level of administrative expenses.

Other

Other insurance products not actively marketed include individual disability, group pension, individual life and corporate-owned life insurance, reinsurance pools and management operations, and other miscellaneous product lines. The majority of these products have been reinsured, with approximately 85 percent of reserves at December 31, 2022 ceded to other insurance companies.

In December 2020, we entered into the first phase of a reinsurance transaction to reinsure the majority of our Closed Block individual disability products to a third party. In March 2021, we completed the second phase of the reinsurance transaction to reinsure a portion of the remaining Closed Block individual disability business that was not ceded in December 2020. For further discussion on this reinsurance transaction, refer to "Reinsurance" herein in this Item 1, "Executive Summary" and "Segment Results" contained herein in Item 7, and Note 12 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Corporate Segment

Our Corporate segment includes investment income on corporate assets not specifically allocated to a line of business, interest expense on corporate debt, and certain other corporate income and expenses not allocated to a line of business.

Reinsurance

In the normal course of business, we assume reinsurance from and cede reinsurance to other insurance companies. In a reinsurance transaction, a reinsurer agrees to indemnify another insurer for part or all of its liability under a policy or policies it

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has issued for an agreed upon premium or fee. We undertake reinsurance transactions for both risk management and capital management. If the assuming reinsurer in a reinsurance agreement is unable to meet its obligations, we remain contingently liable. In the event that reinsurers do not meet their obligations under the terms of the reinsurance agreement, reinsurance recoverable balances could become uncollectible. We evaluate the financial condition of reinsurers to whom we cede business and monitor concentration of credit risk to minimize our exposure. We may also require assets to be held in trust, letters of credit, or other acceptable collateral to support reinsurance recoverable balances. The collectability of our reinsurance recoverable is primarily a function of the solvency of the individual reinsurers. Although we have controls to minimize our exposure, the insolvency of a reinsurer or the inability or unwillingness of a reinsurer to comply with the terms of a reinsurance contract could have a material adverse effect on our results of operations.

In general, the maximum amount of life insurance risk retained by our U.S. insurance subsidiaries under group or individual life or group or individual accidental death and dismemberment policies during 2022 was $1 million per covered life per policy. The retention amount remains at $1 million for 2023. For Unum Limited life insurance risk, during 2022 we had reinsurance agreements which provided 75 percent quota share coverage up to £500 thousand per covered life for group dependent life benefits and 25 percent quota share coverage for most of our group lump sum benefits, as well as 100 percent coverage per covered life above that amount. The same structures will be maintained for coverage during 2023 for Unum Limited. 

In December 2020, we completed the first phase of a reinsurance transaction, pursuant to which Provident, Paul Revere Life, and Unum America, collectively referred to as "the ceding companies", each entered into separate reinsurance agreements with Commonwealth Annuity and Life Insurance Company (Commonwealth), a subsidiary of Global Atlantic Financial Group, to reinsure on a coinsurance basis effective as of July 1, 2020 approximately 75 percent of the Closed Block individual disability business, primarily direct business written by the ceding companies. In March 2021, we completed the second phase of the reinsurance transaction, pursuant to which the ceding companies and Commonwealth amended and restated their respective reinsurance agreements to reinsure on a coinsurance and modified coinsurance basis, effective as of January 1, 2021, a substantial portion of the remaining Closed Block individual disability business that was not ceded in December 2020, primarily business previously assumed by the ceding companies. Commonwealth established and will maintain collateralized trust accounts for the benefit of the ceding companies to secure its obligations under the reinsurance agreements.

Also in December 2020, Provident Life and Casualty Insurance Company (PLC), also a wholly-owned domestic insurance subsidiary of Unum Group, entered into an agreement with Commonwealth whereby PLC will provide a 12-year volatility cover to Commonwealth for the active life cohort (ALR cohort). On March 31, 2021, PLC and Commonwealth amended and restated this agreement to incorporate the ALR cohort related to the additional business that was reinsured between the ceding companies and Commonwealth as part of the second phase of the transaction. At the end of the 12-year coverage period, Commonwealth will retain the risk for the remaining incidence and claims risk on the ALR cohort of the ceded business. Under this volatility cover, annual settlements will be made equal to the difference between the actual and estimated cash flows and reserve changes during the year. Upon expiration of the 12-year period, a terminal settlement will be made based on the final reserves for the ALR cohort. Due to the nature of the volatility cover, the ALR cohort will be accounted for under the deposit method on a U.S. generally accepted accounting principles (GAAP) basis.

We have global catastrophic reinsurance coverage which covers all Unum Group insurance companies and includes four layers of coverage to limit our exposure under life, accidental death and dismemberment, long-term care, and disability policies in regard to a catastrophic event. Each layer provides coverage for all catastrophic events, including acts of war and any type of terrorism, up to $1 million of coverage per person per policy for each U.S. and Poland line of covered business, and up to £2 million of coverage for each U.K. covered line of business. We have the following coverage for 2023, after a $150 million deductible:

Layer	Coverage (in millions)		Percent Coverage
First	$	50.0	50.0	%
Second	55.0		55.0
Third	82.5		55.0
Fourth	165.0		55.0
Total Catastrophic Coverage	$	352.5

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In addition to the global catastrophic reinsurance coverage noted above, Unum Limited has additional catastrophic coverage via an arms-length, intercompany reinsurance agreement with Unum America, under similar terms as the global catastrophic treaties. Unum Limited has the following additional coverage for 2023, after a £81.3 million deductible:

Layer	Coverage (in millions)		Percent Coverage
First	£	32.5	80.0	%
Second	24.4		30.0
Total Catastrophic Coverage	£	56.9

Unum Poland had additional global catastrophic reinsurance coverage of up to zł70 million with a maximum retention limit of zł0.8 million in 2022. Insurable events included passive war, as well as nuclear, chemical, biological and other forms of terrorism. For 2023, Unum Poland has additional global catastrophic reinsurance coverage of up to zł100 million per event, or up to zł200 million for the year, with a maximum retention limit of zł1.2 million. Insurable events exclude war, as well as nuclear, chemical, biological and other forms of terrorism.

Events may occur which limit or eliminate the availability of catastrophic reinsurance coverage in future years.

We have a quota share reinsurance agreement under which we cede certain blocks of Unum US group long-term disability claims. The agreement is on a combination coinsurance with funds withheld and modified coinsurance basis and provides 90 percent quota share reinsurance on the ceded claims. We also have five reinsurance agreements that collectively cede approximately 65 percent of Unum US group life risk up to our per person retention limit for our U.S. insurance subsidiaries. These reinsurance agreements for Unum US group disability and group life allow us to more effectively manage capital in conformity with statutory accounting principles but do not meet insurance risk transfer in accordance with applicable GAAP and therefore are not accounted for as reinsurance in our consolidated GAAP financial statements.

We also cede 30 percent of the risk for certain blocks of recently issued Unum US individual disability policies, as well as some related claims development risk for a limited period of time. The agreement is on a non-proportional modified coinsurance basis with a provision for experience refunds.

Unum America cedes certain long-term care business to Fairwind Insurance Company (Fairwind), which is an affiliated captive reinsurance subsidiary (captive reinsurer) domiciled in the United States, with Unum Group as the ultimate parent. This captive reinsurer was established for the limited purpose of reinsuring risks attributable to specified policies issued or reinsured by Unum America in order to effectively manage risks in connection with this business as well as to enhance our capital efficiency. On a consolidated reporting basis for Unum Group, financial statement impacts of our reinsurance arrangements with affiliates are eliminated in accordance with GAAP.

For further discussion of our reinsurance activities, refer to "Risk Factors" contained herein in Item 1A; "Executive Summary," "Consolidated Operating Results," "Segment Results," and "Liquidity and Capital Resources - Cash Available from Subsidiaries" contained herein in Item 7, and Notes 1, 12, and 16 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Reserves for Policy and Contract Benefits

The applicable insurance laws under which insurance companies operate require that they report, as liabilities, policy reserves to meet future obligations on their outstanding policies. These reserves are the amounts which, with the additional premiums to be received and interest thereon compounded annually at certain assumed rates, are calculated to be sufficient to meet the various policy and contract obligations as they mature. These laws specify that the reserves shall not be less than reserves calculated using certain specified mortality and morbidity tables, interest rates, and methods of valuation required for statutory accounting.

The reserves reported in our financial statements contained herein are calculated in conformity with GAAP and differ from those specified by the laws of the various states and reported in the statutory financial statements of our insurance subsidiaries. These differences result from the use of mortality and morbidity tables and interest assumptions which we believe are more representative of the expected experience for these policies than those required for statutory accounting purposes and also result from differences in actuarial reserving methods.

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The assumptions we use to calculate our reserves are intended to represent an estimate of experience for the period that policy benefits are payable. If actual experience is equal, or favorable, to our reserve assumptions, then reserves should be adequate to provide for future benefits and expenses. If experience is less favorable than the reserve assumptions, additional reserves may be required. The key experience assumptions include claim incidence rates, claim resolution rates, mortality and morbidity rates, policy persistency, interest rates, premium rate increases, and any applicable policy benefit offsets, including those for social security and other government-based welfare benefits. We periodically review our experience and update our policy reserves for new issues and reserves for all claims incurred, as we believe appropriate.

The consolidated statements of income include the annual change in reserves for future policy and contract benefits. The change reflects a normal accretion for premium payments and interest buildup and decreases for policy terminations such as lapses, deaths, and benefit payments. If policy reserves using best estimate assumptions as of the date of a test for loss recognition are higher than existing policy reserves net of any deferred acquisition costs, the increase in reserves necessary to recognize the deficiency is also included in the change in reserves for future policy and contract benefits.

For further discussion of reserves, including anticipated changes to GAAP reserve requirements as a result of the upcoming adoption of Accounting Standards Update 2018-12, Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12), refer to "Risk Factors" contained herein in Item 1A, "Critical Accounting Estimates", "Accounting Developments", and the discussion of segment operating results included in "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7, and Notes 1 and 6 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Investments

Investment activities are an integral part of our business, and profitability is significantly affected by investment results. We segment our invested assets into portfolios that support our various product lines. Generally, our investment strategy for our portfolios is to match the effective asset cash flows and durations with related expected liability cash flows and durations to consistently meet the liability funding requirements of our businesses. We seek to earn investment income while assuming risk in a prudent and selective manner, subject to the constraints of quality, liquidity, diversification, and regulatory considerations. Our overall investment philosophy is to invest in a portfolio of high quality assets that provide investment returns consistent with that assumed in the pricing of our insurance products. Assets are invested predominately in fixed maturity securities.

We manage our asset and liability cash flow and duration match to manage interest rate risk. We may redistribute investments among our different lines of business, when necessary, to adjust the cash flow and/or duration of the asset portfolios to better match the cash flow and duration of the liability portfolios. Asset and liability portfolio modeling is updated on a quarterly basis and is used as part of the overall interest rate risk management strategy. Cash flows from the in-force asset and liability portfolios are projected at current interest rate levels and at levels reflecting an increase and a decrease in interest rates to obtain a range of projected cash flows under the different interest rate scenarios. These results enable us to assess the impact of projected changes in cash flows and duration resulting from potential changes in interest rates. Testing the asset and liability portfolios under various interest rate scenarios enables us to choose what we believe to be the most appropriate investment strategy, as well as to limit the risk of disadvantageous outcomes. Although we test the asset and liability portfolios under various interest rate scenarios as part of our modeling, the majority of our liabilities related to insurance contracts are not interest rate sensitive, and we therefore have minimal exposure to policy withdrawal risk. Our determination of investment strategy relies on long-term measures such as reserve adequacy analysis and the relationship between the portfolio yields supporting our various product lines and the aggregate discount rate assumptions embedded in the reserves. We also use this analysis in determining hedging strategies and utilizing derivative financial instruments to manage interest rate risk and the risk related to matching duration for our assets and liabilities. We do not use derivative financial instruments for speculative purposes.

Refer to "Risk Factors" contained herein in Item 1A; "Critical Accounting Estimates" and the discussion of investments in "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7; "Quantitative and Qualitative Disclosures About Market Risk" herein in Item 7A; and Notes 1, 2, 3, and 4 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for information on our investments and derivative financial instruments.

Ratings

AM Best, Fitch Ratings (Fitch), Moody's Investors Service (Moody's), and Standard & Poor's Ratings Services (S&P) are among the third parties that assign issuer credit ratings to Unum Group and financial strength ratings to our insurance

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subsidiaries. Issuer credit ratings reflect an agency's opinion of the overall financial capacity of a company to meet its senior debt obligations. Financial strength ratings are specific to each individual insurance subsidiary and reflect each rating agency's view of the overall financial strength (capital levels, earnings, growth, investments, business mix, operating performance, and market position) of the insuring entity and its ability to meet its obligations to policyholders. Both the issuer credit ratings and financial strength ratings incorporate quantitative and qualitative analyses by rating agencies and are routinely reviewed and updated on an ongoing basis.

Rating agencies assign an outlook statement of "positive," "negative," or "developing" to indicate an intermediate-term trend in credit fundamentals which could lead to a rating change. "Positive" means that a rating may be raised, "negative" means that a rating may be lowered, and "developing" means that a rating may be raised or lowered with equal probability. Alternatively, a rating may have a "stable" outlook to indicate that the rating is not expected to change.

"Credit watch" or "under review" highlights the potential direction of a short-term or long-term rating. It focuses on identifiable events and short-term trends that cause a rating to be placed under heightened surveillance by a rating agency. Events that may trigger this action include mergers, acquisitions, recapitalizations, regulatory actions, criteria changes, or operating developments. Ratings may be placed on credit watch or under review when an event or a change in an expected trend occurs and additional information is needed to evaluate the current rating level. This status does not mean that a rating change is inevitable, and ratings may change without first being placed on a watch list. A rating is not a recommendation to buy, sell, or hold securities and may be subject to revision or withdrawal at any time by the rating agency. Each rating should be evaluated independently of any other rating.

See "Management's Discussion and Analysis of Financial Condition and Results of Operations - Ratings" contained herein in Item 7 for our current outlook, issuer credit, and financial strength ratings. See also further discussion in "Risk Factors" contained herein in Item 1A.

Competition

There is significant competition among insurance companies for the types of products we sell. We are operating in a dynamic competitive environment of both traditional and non-traditional competitors, with changes in product offerings, enrollment services, and technology solutions. We believe that the principal competitive factors affecting our business are quality of the customer experience regarding service and claims management, integrated product choices, enrollment capabilities, price, financial strength ratings, claims-paying ratings, and a solution to allow customers to comply with the changing laws and regulations related to family medical leave benefits.

Our principal competitors for our products include the largest insurance companies in the employee benefits industry as well as regional companies offering specialty products. Some of these companies have more competitive pricing or have higher claims-paying ratings. Some may also have greater financial resources with which to compete.

In the United Kingdom and Poland, where we sell both individual and group products, we compete with a mix of large internationally recognized providers and strong local carriers. 

All areas of the employee benefits markets are highly competitive due to the yearly renewable term nature of certain of our products and the large number of insurance companies offering products in this market. There is a risk that our customers may be able to obtain more favorable terms or improved technology solutions from competitors in lieu of renewing coverage with us. The effect of competition may, as a result, adversely affect the persistency of these and other products, as well as our ability to sell products in the future.

We must attract and retain independent agents and brokers to actively market our products. Strong competition exists among insurers for agents and brokers. We compete with other insurers for sales agents and brokers primarily on the basis of our product offerings, financial strength, support services, and compensation. Sales of our products could be materially adversely affected if we are unsuccessful in attracting and retaining agents and brokers.

For further discussion, refer to "Risk Factors" contained herein in Item 1A.

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Regulation

We and our subsidiaries are subject to extensive and comprehensive supervision and regulation in the United States, the United Kingdom, and Poland. The laws and regulations with which we must comply are complex and subject to change. New or existing laws and regulations may become more restrictive or otherwise adversely affect our operations.

Insurance Regulation and Oversight

Our U.S. insurance subsidiaries are subject to regulation and oversight by insurance regulatory authorities in the jurisdictions in which they do business. State insurance regulators in the U.S. generally have broad powers with respect to all aspects of the insurance business, including the power to: license and examine insurance companies; regulate and supervise sales practices and market conduct; license agents and brokers; approve policy forms; approve premium rates and subsequent increases thereon for certain insurance products; establish reserve requirements and solvency standards; place limitations on shareholder dividends; prescribe the form and content of required financial statements and reports; regulate the types and amounts of permitted investments; regulate the use and disclosure of personal information; and regulate reinsurance transactions. Our U.S. insurance subsidiaries are examined periodically by their states of domicile and by other states in which they are licensed to conduct business. The domestic examinations have traditionally emphasized financial matters from the perspective of protection of policyholders, but they can and have covered other subjects that an examining state may be interested in reviewing, such as market conduct issues and reserve adequacy. Examinations by non-domestic states more typically focus on market conduct, such as a review of sales practices, including the content and use of advertising materials and the licensing and appointing of agents and brokers, as well as underwriting, claims, and customer service practices, and identification and handling of unclaimed property to determine compliance with state laws. Our U.S. insurance subsidiaries are also subject to assessments by state insurance guaranty associations to cover the proportional cost of insolvent or failed insurers.

We are also regulated by the U.S. Department of Labor (DOL) on a national basis, primarily for the protection of policyholders. The DOL enforces a comprehensive federal statute that regulates claims paying fiduciary responsibilities and reporting and disclosure requirements for most employee benefit plans.

Our U.K. insurance subsidiary, Unum Limited, is subject to dual regulation by the Prudential Regulation Authority (PRA) and the Financial Conduct Authority (FCA). The PRA oversees the financial health and stability of financial services firms and is responsible for the prudential regulation and day-to-day supervision of insurance companies. The FCA seeks to protect consumers and oversees financial services products and practices, including those governing insurance companies in the U.K.

On January 31, 2020, an official bill was passed formalizing the withdrawal of the U.K. from the European Union (EU). A deal was reached on December 24, 2020, on the future trading relationship with the EU, which focused primarily on the trading of goods rather than the U.K.’s service sector. A memorandum of understanding on regulatory cooperation was signed by the U.K. and EU in March 2021, but no agreement on the equivalence of the regulatory regimes has yet been reached. The U.K. government is now reviewing the regulatory framework of financial services companies which may result in changes to U.K. regulatory capital or U.K. tax regulations, which is not expected until later in 2023. We do not expect that the underlying operations of our U.K. business, nor the Polish business which is in the EU, will be significantly impacted by the withdrawal, but it is possible that we may experience some short-term volatility in financial markets, which could impact the fair value of investments, our solvency ratios, or the British pound sterling to dollar exchange rate.

Our Polish insurance subsidiary, Unum Zycie TUiR, is subject to regulation by the Komisja Nadzoru Finansowego (KNF) of the Financial Supervision Authority (FSA) in Poland. The KNF oversees the financial health and stability of financial services firms and is responsible for the prudential regulation and day-to-day supervision of insurance companies and other financial institutions.

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Capital Requirements

Risk-based capital (RBC) standards for U.S. life insurance companies are prescribed by the National Association of Insurance Commissioners (NAIC). The domiciliary states of our U.S. insurance subsidiaries have all adopted a version of the NAIC RBC Model Act, which prescribes a system for assessing the adequacy of statutory capital and surplus for all life and health insurers. The basis of the system is a risk-based formula that applies prescribed factors to the various risk elements in a life and health insurer's business to report a minimum capital requirement proportional to the amount of risk assumed by the insurer. The life and health RBC formula is designed to measure annually (i) the risk of loss from asset defaults and asset value fluctuations, (ii) the risk of loss from adverse mortality and morbidity experience, (iii) the risk of loss from a mismatch in asset and liability cash flows due to changing interest rates, and (iv) business risks. The formula is used as an early warning tool to identify companies that are potentially inadequately capitalized. The formula is intended to be used as a regulatory tool only and is not intended as a means to rank insurers generally. In 2022, the NAIC adopted changes to the C-2 mortality factors, including a more granular structure and updated mortality risk factors. These changes were effective for 2022 year-end reporting and reduced our capital requirements for the business.

The NAIC continues to review the state-based solvency regulation framework to identify opportunities to respond to national and international insurance regulatory and solvency developments. The topics of its review include capital requirements, governance and risk management, statutory accounting and financial reporting, and reinsurance. This ongoing review has resulted in changes to U.S. insurance regulation and solvency standards, including those for our U.S. insurance subsidiaries.

One of the outcomes of the NAIC's review was the adoption of the NAIC Risk Management and Own Risk and Solvency Assessment (ORSA) Model Act which, following enactment at the state level, requires insurers to provide, at least annually, a group-level perspective on the risks of the current and future business plans and the sufficiency of capital to support those risks. All states where our traditional U.S. insurance subsidiaries are domiciled have enacted ORSA requirements, and we file an ORSA summary report annually with the applicable insurance regulators.

The NAIC has also developed a group capital calculation (GCC) intended to be used by U.S. regulators as a tool to assess the risks and financial position of insurance groups, including any non-insurance subsidiaries. The NAIC amended the Model Holding Company Act and Regulation to adopt the GCC and implement an annual GCC filing requirement. Our lead state regulator, the Maine Bureau of Insurance, adopted the NAIC GCC standards in 2022. We do not expect the new standards to have a material impact on our capital management.

We are also monitoring the International Association of Insurance Supervisors' (IAIS) development of new capital requirements applicable to Internationally Active Insurance Groups (IAIGs). While we are not currently subject to the reforms adopted by the IAIS, they are a factor influencing the substance and timing of the NAIC's activities around capital.

The NAIC and state insurance regulators continue to examine the industry's use of captive insurance companies to transfer insurance risk and finance reserves required under current regulations. No changes in the use or regulation of captive reinsurers have been proposed by the NAIC, and we are unable to predict the extent of any changes that might be made. After the ceding companies recaptured their respective reinsurance agreements with Northwind Reinsurance Company (Northwind Re) prior to the first phase of the Closed Block individual disability reinsurance transaction, we placed Northwind Re into dormancy. We then merged Northwind Re into an affiliate in 2022. Therefore, Fairwind remains our only captive reinsurer. We expect to continue our strategy of using a captive reinsurer to manage risks while monitoring the NAIC's study and proposed changes in regulations. See "Reinsurance" contained herein in this Item 1 for further discussion.

The PRA has statutory requirements, including capital adequacy and liquidity requirements and minimum solvency margins, to which Unum Limited must adhere as part of the provisions of Solvency II, an EU directive that is part of retained U.K. law pursuant to the European Union (Withdrawal) Act 2018, which prescribes capital requirements and risk management standards for the European insurance industry.  Our U.K. holding company is also subject to the Solvency II requirements relevant to insurance holding companies, while its subsidiaries (the Unum UK Solvency II Group), which includes Unum Limited, are subject to group supervision under Solvency II.  The Unum UK Solvency II Group received approval from the U.K. PRA to use its own internal model for calculating regulatory capital and also received approval for certain associated regulatory permissions including transitional relief which applies until January 1, 2032.  In connection with the recent exit from the EU, the U.K. government is reviewing the regulatory framework of financial services companies which may result in changes to U.K. regulatory capital or U.K. tax regulations.

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See further discussion in "Risk Factors" contained herein in Item 1A and "Executive Summary," "Liquidity and Capital Resources" contained herein in Item 7 and Note 16 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.     

Insurance Holding Company Regulation

We and our U.S. insurance subsidiaries (excluding captive reinsurers) are subject to regulation under the insurance holding company laws in the states in which our insurance subsidiaries are domiciled, which currently include Maine, Massachusetts, New York, South Carolina, and Tennessee. These laws generally require each insurance company that is domiciled in the state and a member of an insurance holding company system to register with the insurance department of that state and to furnish at least annually financial and other information about the operations of companies within the holding company system, including information concerning capital structure, ownership, management, financial condition, and certain intercompany transactions. Transactions between an insurer and affiliates in the holding company system generally must be fair and reasonable and, if material, require prior notice and approval by the domiciliary state insurance regulator.

In addition, such laws and regulations restrict the amount of dividends that may be paid by our insurance subsidiaries to their respective shareholders, including our Company and certain of our intermediate holding company subsidiaries. See further discussion in "Risk Factors" contained herein in Item 1A and "Liquidity and Capital Resources - Cash Available from Subsidiaries" contained herein in Item 7.

The NAIC has adopted the Corporate Governance Annual Disclosure Model Act and the Corporate Governance Annual Disclosure Model Regulation, which require U.S. insurers to disclose detailed information regarding their governance practices. The model act and regulation must be adopted by individual state legislatures and insurance regulators in order to be effective in a particular state. All of the states in which our insurance subsidiaries are domiciled have adopted a requirement to file a corporate governance annual disclosure similar to the model act and regulations.

The laws of most states, including the states in which our insurance subsidiaries are domiciled (or deemed to be commercially domiciled), require regulatory approval of a change in control of an insurance company or its holding company. Where these laws apply to us, there can be no effective change in control of our Company or of any of our insurance subsidiaries unless the person seeking to acquire control has filed a statement containing specified information with the appropriate insurance regulators and has obtained their prior approval of the proposed change. The usual measure for a presumptive change of control pursuant to these laws is the acquisition of 10 percent or more of the voting stock of an insurance company or its holding company, although this presumption is rebuttable. Consequently, a person acquiring 10 percent or more of the voting stock of an insurance company or its holding company without the prior approval of the insurance regulators in the state(s) of domicile of the insurance company(ies) sought to be acquired (or whose holding company is sought to be acquired) will be in violation of these laws. Such a person may also be subject to one or more of the following actions: (i) injunctive action requiring the disposition or seizure of those shares by the applicable insurance regulators; (ii) prohibition of voting of such shares; and (iii) other actions determined by the relevant insurance regulators. Further, many states' insurance laws require that prior notification be given to state insurance regulators of a change in control of a non-domiciled insurance company doing business in the state. These pre-notification statutes do not authorize the state insurance regulators to disapprove the change in control; however, they do authorize regulatory action in the affected state if particular conditions exist, such as undue market concentration. Any future transactions that would constitute a change in control of our Company or of any of our insurance subsidiaries may require prior notification in those states that have adopted pre-notification laws.

These laws may discourage potential acquisition proposals and may delay, deter, or prevent a change in control of our Company, including through transactions, and in particular unsolicited transactions, that some or all of our shareholders might consider to be desirable.

Information Security and Privacy Regulation

A growing number of federal, state, and foreign laws and regulations require companies, including insurance companies, to adopt measures designed to protect the security and privacy of personal information collected during the course of operations. These laws and regulations vary across jurisdictions.

Specifically, state insurance laws govern the collection, use and disclosure of personal information in the context of providing insurance products and services. Certain of our insurance products also are subject to the Health Insurance Portability and Accountability Act, which is enforced by the U.S. Department of Health and Human Services and regulates the disclosure and use of protected health information. Generally, these laws require insurers to give policyholders notice about the insurer’s

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privacy practices, place restrictions on how the insurer can use and disclose personal information, require the insurer to enact certain cybersecurity measures to protect the data, and obligate insurers to notify individuals and regulators in certain cases when personal data is compromised.

Cybersecurity is an area of significant, and increasing, focus of insurance regulators. For example, the NAIC's Insurance Data Security Model Law (the Cybersecurity Model Law), enacted in over twenty states, requires insurers to implement cybersecurity measures and develop cyber incident response plans. The New York State Department of Financial Services' cybersecurity regulation contains provisions similar to the Cybersecurity Model Law, in addition to more prescriptive cybersecurity obligations.

States are also adopting laws and regulations that govern the collection, processing, storage, and destruction of personal information outside the context of providing insurance products. Several states have enacted comprehensive consumer privacy laws, and other states are considering passing similar laws. Currently, significant portions of our business are exempt from the requirements of these laws, but we cannot be certain that will continue to be the case as additional laws are adopted and existing laws are amended.

The General Data Protection Regulation of the European Union (EU) and the U.K. General Data Protection Regulation (collectively referred to as "the GDPR") establish the legal framework for our EU and U.K. entities that collect and process information from individuals who reside in the EU and U.K., respectively. The GDPR is a comprehensive set of data protection rules that gives individuals certain rights to their personal data and places obligations on organizations that process personal data.

We continuously monitor federal, state, and foreign legislative and regulatory developments to understand their potential impact on our profitability and resources.

Other Laws and Regulations

We are subject to the U.S. federal laws and regulations generally applicable to public companies, including the rules and regulations of the Securities and Exchange Commission (SEC) and the New York Stock Exchange relating to public reporting and disclosure, accounting and financial reporting, corporate governance, and securities trading. Further, the Sarbanes-Oxley Act of 2002, and rules and regulations adopted under this regulation, have increased the requirements for us and other public companies in these and other areas.

The USA PATRIOT Act of 2001 (Patriot Act) contains anti-money laundering and financial transparency laws and mandates the implementation of various regulations applicable to broker-dealers and other financial services companies, including insurance companies. The Patriot Act seeks to promote cooperation among financial institutions, regulators, and law enforcement entities in identifying parties that may be involved in terrorism or money laundering. The National Defense Authorization Act for Fiscal Year 2021 (NDAA) makes the most significant changes to the U.S. anti-money laundering laws since the Patriot Act. The NDAA requires many U.S. companies to report their beneficial owners and establishes a new whistleblower program. We are not subject to the NDAA’s requirements but will monitor any developments resulting from the passage of the NDAA. Anti-money laundering laws outside of the United States contain some similar provisions. Additionally, other federal laws and regulations, including the Foreign Corrupt Practices Act and regulations issued by the Office of Foreign Assets Control, as well as the U.K.'s Bribery Act of 2010, have increased requirements relating to identifying customers, prohibiting transactions with certain organizations or individuals, watching for and reporting suspicious transactions, responding to requests for information by regulatory authorities and law enforcement agencies, sharing information with other financial institutions, and requiring the implementation and maintenance of internal practices, procedures, and controls.

Enacted in 2010, the Dodd-Frank Wall Street Reform and Consumer Protection Act (Dodd-Frank) effected comprehensive changes to the regulation of financial services in the United States. Dodd-Frank directed various government agencies and bodies to promulgate regulations implementing the law, many of which remain to be completed.

On October 26, 2022, the SEC adopted final rules requiring the recovery of erroneously awarded incentive-based compensation. These rules were adopted pursuant to portions of the Dodd-Frank Act that previously directed the SEC to regulate and require public companies to implement a compensation recovery policy. The new rules direct national securities exchanges to establish listing standards that require each listed issuer to adopt and disclose a policy, known as a clawback policy, providing for the recovery of any erroneously awarded incentive-based compensation from current and former executive officers in the event of a required accounting restatement due to material noncompliance with financial reporting requirements under the securities laws. The clawback policy would apply to compensation received during the three-year period preceding

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the date the issuer is required to prepare the accounting restatement. We will adopt and disclose a formal policy by the required effective date once standards are set by the national securities exchanges. We continue to monitor the political, legislative, and regulatory environment, where possible amendments to various provisions of Dodd-Frank are under discussion.

We are subject to income, employment, premium, excise and other taxes related to both our U.S. and our foreign operations.

On August 16, 2022, the Inflation Reduction Act (IRA) was signed into law in the U.S. and includes certain corporate tax provisions effective January 1, 2023. It imposes a new 15 percent corporate alternative minimum tax (CAMT) on adjusted financial statement income (AFSI) on corporations that have average AFSI over $1.0 billion in any prior three-year period, starting with years 2020 to 2022. We anticipate that our company will be an applicable corporation as early as 2023. We do not expect that any CAMT incurred would impact earnings since it would be offset with a credit toward regular income tax in subsequent years. We continue to monitor the ongoing guidance issued by the United States Treasury. The IRA also imposes a one percent excise tax on the fair market value of corporate stock repurchases after December 31, 2022.

On June 10, 2021, the Finance Act 2021 was enacted in the U.K., which establishes a U.K. corporate tax rate of 25 percent and is effective April 1, 2023. On July 22, 2020, the Finance Act 2020 was enacted, which established a U.K. corporate tax rate of 19 percent and was retroactively effective April 1, 2020.

See "Executive Summary" and "Liquidity and Capital Resources" contained herein in Item 7 and Notes 7 and 16 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for discussion of the impact to our financial position and results of operations as a result of these changes.

Federal, foreign, and state tax laws and regulations are subject to change, and any such change could materially impact our federal, foreign, or state taxes and reduce profitability as well as capital levels in our insurance subsidiaries.  We continually monitor tax legislative and regulatory developments to understand their potential impact on our profitability.

Regulatory focus on the risks posed by climate change is increasing, with some regulators now requiring that the Company integrate consideration of the risks of climate change into our governance and risk management frameworks. We expect the regulatory focus in this area to continue.

For further discussion of regulation, refer to "Risk Factors" contained herein in Item 1A.

Geographic Areas

Adjusted operating revenue, which excludes net investment gains and losses, for our Unum International segment was approximately 7 percent of our consolidated adjusted operating revenue in both 2022 and 2021, and approximately 6 percent in 2020. As of December 31, 2022, total assets equaled approximately 5 percent of consolidated assets and total liabilities equaled approximately 5 percent of consolidated liabilities for our Unum International segment. Fluctuations in the U.S. dollar relative to the local currencies of our Unum International segment will impact our reported operating results. See "Risk Factors" contained herein in Item 1A and "Quantitative and Qualitative Disclosures About Market Risk" contained herein in Item 7A for further discussion of fluctuations in foreign currency exchange rates. See "Reporting Segments" contained herein in this Item 1; "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7; and Note 13 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of Unum International's operating results.

Human Capital Resources

Human Capital

The Company is built on the promise of helping the working world thrive throughout life’s moments, an inspiring purpose that requires harnessing the creativity and energy of our employees. As of December 31, 2022, we employed 10,937 employees, of which approximately 10,665 are full-time employees. Approximately 87 percent of our employees are in the United States, and the remaining 13 percent are international.

We have experienced lower voluntary turnover, which, excluding Poland, decreased from 15.6 percent in 2021 to 14.9 percent in 2022 and remains below the U.S. Bureau of Labor Statistics' voluntary turnover benchmark of 17.8 percent for the U.S. finance and insurance industry. Recognizing that the marketplace for talent has remained competitive, we made additional investments throughout the year to help retain talent in roles experiencing notable market pressure. This included targeted

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compensation adjustments to selected roles and individuals across the enterprise, based on external benchmarks and internal data.

While continuously monitoring workplace safety, our offices were open during 2022 and the majority of employees returned to the office utilizing a hybrid schedule. Our flexible approach maximizes the benefits of the office, such as networking, learning, and collaborative problem solving, while offering employees the flexibility to design an in-office schedule based on work and life obligations. This approach ensures that we continue to grow, change, and thrive as an enterprise by helping to support a diverse workforce with a focus on employee well-being. Additionally, it supports our commitment to build an inclusive culture, creating diversity in how and where we work. As we continue to gain insights based on our experience, we may continue to adjust our hybrid approach. Our international locations each continue to follow their established strategies based on their local environment.

Compensation and Benefits

We provide compensation and benefits programs which support our employees’ health, wealth, and life. In addition to competitive pay, other programs (which vary by country/region) include: annual bonus and employee recognition; stock awards and stock purchase; life, medical, pharmacy, health reimbursement accounts; telehealth and preventive services; dental, vision, voluntary benefits and disability insurance; tuition assistance; 401(k) plan, financial education and planning support; student debt relief; back-up and emergency care services; employee assistance program and family building resources; digital behavioral health support; paid time off and paid holidays; paid caregiver and parental leave; virtual stress management resources; onsite and virtual fitness memberships and subsidized healthy food options.

Inclusion and Diversity

Appreciating differences is one of our core values and drives how we deliver on our purpose and achieve our goals. We are committed to creating a culture of belonging where employees can bring their full selves to work and see themselves in every aspect of our business. We believe the best way to meet the needs of our customers and make better decisions is to reflect their diversity in our own workforce. Of our 10,937 employees, 67 percent identify as female; and 22 percent, excluding Poland, identify as members of an ethnic or racially diverse group.

We embrace the unique talents of every team member and help them reach their full potential through our Better with U inclusion and diversity (I&D) training, focused learning and leadership development programs, and an array of online resources. In addition, we have a dedicated Office of I&D focused on driving strategies to create a culture where inclusivity is an expectation for every employee and leader. We partner with diverse stakeholders to increase awareness and provide guidance that helps operationalize inclusion through resources, programs, and policies that enhance our workforce culture.

Our Inclusion Network plays a critical role in our I&D strategy by helping to identify solutions to inclusion barriers and advance our I&D initiatives. The Inclusion Network includes our Employee Networks, Business Networks, I&D Advisory Board, and Ambassadors. Employee Networks are designed to create connection and build community while advancing belonging and uniqueness across the company. Our current Employee Networks and the employee groups they represent are as follows: UNITEd (Multicultural); enABLE (Disabilities); bePROUD (LGBTQ+); and upLIFT (Gender Equity). Ambassadors and Business Networks are liaisons to our business and ensure I&D initiatives are successfully implemented throughout the enterprise. The Advisory Board reviews and provides recommendations on I&D priorities, helps to remove barriers in advancing the I&D strategy, and advocates for inclusion and belonging across the enterprise.

We have established an expectation for all people leaders to embed I&D into their performance goals and daily behaviors which is reinforced throughout the year by leadership. By embracing shared ownership, leaders help drive inclusion at all levels.

Our ability to attract, develop, and retain diverse, top talent is a critical component of our success. We are committed to diverse recruiting strategies across the enterprise, and we are focused on ensuring that our selection process is inclusive. The talent acquisition team partners with our Office of I&D to ensure strategies are in place to retain diverse talent through internal mobility and belonging. We support our recruiters to obtain and maintain certification in diversity recruiting. We partner with diverse organizations and associations to support diverse hiring at all levels. In addition, our recruiters and hiring managers receive training focused on unconscious bias in the selection process and actions they can take to avoid it.

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Learning and Development

We place a strong emphasis on training and professional development for all levels of our workforce to ensure that people of every background have the tools to reach their full potential. All employees have one-to-one coaching sessions with their managers. On a quarterly basis, managers summarize conversations with meaningful documentation on key accomplishments, progress toward goals, and other areas of focus, including career development. Managers and employees also review next steps to help align activities with company goals. We believe continuous coaching conversations help all employees and managers work more effectively.

We offer numerous employee development programs, including:

•Accelerated Leadership Program: This program focuses on accelerating the leadership development of high-potential employees while they remain in their current roles. The goal of this program is to prepare the participants for promotion or strategic lateral movement within 12-18 months of graduation.

•Equity in Leadership Program: This program focuses on championing equity and opportunity by preparing racially diverse employees to advance to higher levels of leadership.

•Actuarial Development Program (ADP), Accounting and Finance Development Program (AFDP) and Professional Development Program (PDP): These are multi-year rotational programs that focus on preparing participants to become future leaders of our company. The ADP and the AFDP focus on developing both leadership and finance-related technical skills, while the PDP focuses primarily on developing leadership combined with broad operational experience.

•Leader Academy: An online program available to managers, leaders, or any employee interested in moving into a management role. Each quarter, 12-week cohorts allow participants to learn about interpersonal effectiveness, elevating performance, strategic decision-making, and leading change.

We recognize that our employees are an important asset. Therefore, it is imperative that we continue to focus on the growth and development of our workforce in a meaningful way and provide them with the necessary support to achieve their career goals.

Employee Engagement

To ensure our employees are engaged and are effectively delivering on our mission and meeting our customers’ needs, we regularly conduct confidential employee surveys to obtain feedback and gain insights from our employees. These surveys are thoughtfully considered and actioned by leadership. We are committed to our employees’ growth and development and embrace the diversity of ideas for improvement. In our employee survey conducted in 2022, 9,272 employees responded and approximately 75 percent of those employees indicated favorable engagement and would recommend the company as a great place to work.

Available Information

Our internet website address is www.unum.com. We make available, free of charge, on or through our website our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K, and amendments to those reports filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after filing such material with the Securities and Exchange Commission.

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Information about our Executive Officers

Our executive officers and persons chosen to become executive officers as of the date hereof are listed below. Our executive officers, who are also executive officers of certain of our principal subsidiaries, were appointed by Unum Group's board of directors to serve until their successors are chosen and qualified or until their earlier resignation or removal.

Name	Age	Position
Richard P. McKenney	54	President and Chief Executive Officer and a Director
Steven A. Zabel	54	Executive Vice President, Chief Financial Officer
Michael Q. Simonds	49	Executive Vice President, Chief Operating Officer
Elizabeth C. Ahmed	48	Executive Vice President, People and Communications
Timothy G. Arnold	60	Executive Vice President, Voluntary Benefits and President, Colonial Life
Puneet Bhasin	60	Executive Vice President, Chief Information and Digital Officer
Lisa G. Iglesias	57	Executive Vice President, General Counsel
Martha D. Leiper	60	Executive Vice President, Chief Investment Officer
Christopher W. Pyne	53	Executive Vice President, Group Benefits
Mark P. Till	55	Executive Vice President and CEO, Unum International

Mr. McKenney became President in April 2015 and Chief Executive Officer in May 2015. He served as Executive Vice President and Chief Financial Officer from August 2009 until April 2015, having joined the Company in July 2009. Before joining the Company, Mr. McKenney served as Executive Vice President and Chief Financial Officer of Sun Life Financial Inc., an international financial services company, from February 2007, having joined that company as Executive Vice President in September 2006.

Mr. Zabel became Executive Vice President, Chief Financial Officer in July 2019. He previously served as Senior Vice President and President, Closed Block Operations from July 2015 to July 2019 and as Senior Vice President, Chief Risk Officer from August 2013 to July 2015. Prior to joining the Company in August 2013, he served in various senior roles at Genworth Financial, Inc. from 2004, including Senior Vice President of Long-Term Care Insurance, Chief Financial Officer for Insurance Products, and Senior Vice President of Corporate Audit Services.

Mr. Simonds was named Executive Vice President, Chief Operating Officer in February 2020. Prior to that, he served as Executive Vice President, President and Chief Executive Officer, Unum US from July 2013, after having served as Senior Vice President and Chief Operating Officer, Unum US from June 2012. He previously served as Senior Vice President, Growth Operations, Unum US from July 2010, and as Senior Vice President and Chief Marketing Officer, Unum US from March 2008. Mr. Simonds originally joined a Unum Group predecessor company in 1994, left the Company in 2000 to pursue his MBA, and rejoined the Company in 2003.

Ms. Ahmed was named Executive Vice President, People and Communications upon joining the Company in October 2018. She served as Executive Vice President, Chief Human Resources Officer, at AmTrust Financial Services, Inc., a multinational insurance holding company, from May 2015 to October 2018. Prior to that, she served as Vice President of Human Resources at Equity Trust Company, a financial services company, from May 2012 to May 2015, and as Senior Vice President of Human Resources at PNC Bank, a diversified financial services institution, from August 2008 to May 2012.

Mr. Arnold was named Executive Vice President, Voluntary Benefits and President, Colonial Life in February 2020. Prior to that, he served as Executive Vice President, President and Chief Executive Officer, Colonial Life from January 2015, and before that, as Executive Vice President, President, Colonial Life from July 2014. He previously served as Senior Vice President, Sales and Marketing, Colonial Life from August 2012, as Senior Vice President, Chief Operations Officer, Colonial Life from July 2011, and as Senior Vice President, Integrated Underwriting, Unum US from May 2010.

Mr. Bhasin was named Executive Vice President, Chief Information and Digital Officer after joining the Company in March 2018. He served as Executive Vice President, Corporate Operations and Recycling at Waste Management, Inc., a waste management environmental services provider, from November 2015 to March 2017. While at Waste Management, he also served as Senior Vice President, Corporate Operations from November 2014, Chief Information Officer and Senior Vice President, Technology, Logistics and Customer Service from August 2012, and Senior Vice President and Chief Information Officer from December 2009.

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Ms. Iglesias was named Executive Vice President, General Counsel upon joining the Company in January 2015. She served as Senior Vice President, General Counsel and Secretary of WellCare Health Plans, Inc., a managed care company, from February 2012 to December 2014, having first joined WellCare in February 2010 as Vice President, Securities and Assistant General Counsel. Prior to that, she served as General Counsel and Corporate Secretary for Nordstrom, Inc., a fashion specialty retailer, from 2007 to 2008.

Ms. Leiper was appointed Executive Vice President, Chief Investment Officer of the Company in October 2019. She joined the Company from USAA, a provider of financial services to the military community, where she served as Senior Vice President, Corporate Finance and Enterprise Money Movement from October 2016 to October 2019 and, before that, as Senior Vice President, Corporate Finance and Investments from May 2015 to September 2016 and Senior Vice President, Chief Investment Officer from May 2010 to May 2015. Ms. Leiper previously worked at Unum Group as Senior Vice President and Deputy Chief Investment Officer from January 2006 to May 2010.

Mr. Pyne was named Executive Vice President, Group Benefits in February 2020. He previously served as Senior Vice President, Growth Operations and Distribution from June 2018 to January 2020 and as Senior Vice President, Sales and Client Management from June 2011 to June 2018. Before that, Mr. Pyne held positions of increasing responsibility within the Company's U.S. distribution organization, including Vice President, Sales from January 2011 to May 2011 and Vice President, Managing Director from January 2008 to December 2010.

Mr. Till was named Executive Vice President and CEO, Unum International in April 2021. He served as Executive Vice President and CEO Designate, Unum International after joining Unum in February 2021. Prior to joining the Company, Mr. Till served from July 2020 to January 2021 as Managing Director, Platform Solutions at Aegon, an international financial services organization, in the U.K. (Aegon UK). While at Aegon UK, he served as Managing Director, Digital Solutions from May 2018 to July 2020, as Chief Distribution and Marketing Officer from June 2016 to May 2018, and as Managing Director, Customer Value Management from September 2015 to June 2016. He previously served as Head of Personal Investing and Marketing Director for Fidelity International from January 2012 to February 2015.

ITEM 1A. RISK FACTORS

Overview

We face a wide range of risks, and our continued success depends on our ability to identify and appropriately manage our risk exposures. Discussed below are factors that may adversely affect our business, results of operations, or financial condition. Any one or more of the following factors may cause our actual results for various financial reporting periods to differ materially from those expressed in any forward-looking statements made by or on behalf of the Company, including those in this document or made by us elsewhere, such as in earnings release investor calls, investor conference presentations, or press releases. See "Cautionary Statement Regarding Forward-Looking Statements" contained herein on page 1.

Insurance Risks

We provide a broad array of disability, long-term care, group life, and voluntary insurance products that are affected by many factors, and changes in any of those factors may adversely affect our results of operations, financial condition, or liquidity.

Disability Insurance

Disability insurance may be affected by a number of social, economic, governmental, competitive, and other factors. Changes in societal attitudes, such as work ethic, motivation, or stability, can significantly affect the demand for and underwriting results from disability products.

Both economic and societal factors can affect claim incidence and recoveries for disability insurance. Claim incidence and claim recovery rates may be influenced by, among other factors, the rate of unemployment and consumer confidence. Claim incidence and claim recovery rates may also be influenced by the emergence of new infectious diseases or illnesses. Claim durations may be extended by medical improvements which could extend life expectancies. The relationship between these and other factors and overall incidence is very complex and will vary due to contract design features and the degree of expertise within the insuring organization to price, underwrite, and adjudicate the claims.

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Within the group disability market, pricing and renewal actions can be taken in response to higher claim rates and higher administrative expenses. However, these actions take time to implement, and there is a risk that the market will not sustain increased prices. In addition, changes in economic and external conditions may not manifest themselves in claims experience for an extended period of time. The pricing actions available in the individual disability market differ among product classes. Our individual noncancelable disability policies, in which the policy is guaranteed to be renewable through the life of the policy at a fixed premium, do not permit us to adjust premiums on our in-force business. Guaranteed renewable contracts that are not noncancelable can be repriced to reflect adverse experience, but rate changes cannot be implemented as quickly as in the group disability market.

Long-term Care Insurance

Long-term care insurance can be affected by a number of demographic, medical, economic, governmental, competitive, and other factors. Because long-term care insurance is a relatively new product for the insurance industry and is long-duration in nature, there is not as much historical data as is available for our other products, especially at advanced ages. This creates a level of uncertainty in properly pricing the product and using appropriate assumptions when establishing reserves. Long-term care insurance is guaranteed renewable and can be repriced to reflect adverse experience, but the repricing is subject to regulatory approval by our states of domicile and may also be subject to approval by jurisdictions in which our policyholders reside. The rate approval process can affect the length of time in which the repricing can be implemented, if at all, and the rate increases ultimately approved may be unfavorable relative to assumptions used to establish our reserves. We monitor our own experience and industry studies concerning morbidity, mortality, and policyholder terminations to understand emerging trends.  Changes in actual experience relative to our expectations may adversely affect our profitability and reserves.  To the extent mortality improves for the general population, and life expectancies increase, the period for which a claimant receives long-term care benefits may lengthen and the associated impact of advanced aging of policyholders may cause an increase in claims incidence. Medical advances may continue to have an impact on claim incidence and duration, both favorable and unfavorable. Due to the long duration of the product, the timing and/or amount of our investment cash flows are difficult to match to those of our maturing liabilities.

Group Life Insurance

Group life insurance may be affected by the characteristics of the employees insured, the amount of insurance employees may elect voluntarily, our risk selection process, our ability to retain employer groups with favorable risk characteristics, the geographical concentration of employees, and mortality rates. Claim incidence may also be influenced by unexpected catastrophic events such as terrorist attacks, natural disasters, and pandemic health events, which may also affect the cost of and availability of reinsurance coverage. Within the group life market, pricing and renewal actions can be taken in response to higher claim rates and higher administrative expenses. However, these actions take time to implement, and there is a risk that the market will not sustain increased prices.

Voluntary Products

Voluntary products sold in the workplace may be affected by the characteristics of the employees insured, the level of employee participation and the amount of insurance the employees elect, our risk selection process, and our ability to retain employer groups with favorable risk characteristics.  A portion of our voluntary life insurance products include interest sensitive forms of insurance which contain a guaranteed minimum interest crediting rate. It is possible that our investment returns could be lower than the guaranteed crediting rate.  While a significant portion of our non-life contracts are optionally renewable, some are

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guaranteed renewable and can be repriced to reflect adverse experience, but rate changes cannot be implemented as quickly as for group disability and group life products.

Actual experience may differ from our reserve assumptions which may adversely affect our results of operations or financial condition.

Historical results may not be indicative of future performance due to, among other things, changes in our mix of business, repricing of certain lines of business, or any number of economic cyclical effects on our business. Reserves, whether calculated under GAAP or statutory accounting principles, do not represent an exact calculation of future benefit liabilities but are instead estimates made by us using actuarial and statistical procedures. Actual experience may differ from our reserve assumptions. There can be no assurance that our reserves will be sufficient to fund our future liabilities in all circumstances. Future loss development may require reserves to be increased, which would adversely affect earnings in current and future periods. Life expectancies may increase, which could lengthen the time a claimant receives disability or long-term care benefits and could result in a change in mortality assumptions and an increase in reserves for these and other long-tailed products. Adjustments to reserve amounts may also be required in the event of changes from the assumptions regarding future morbidity (which represents the incidence of claims and the rate of recovery, including the effects thereon of inflation and other societal and economic factors); premium rate increases; persistency; policy benefit offsets, including those for social security and other government-based welfare benefits; and interest rates used in calculating the reserve amounts, which could have a material adverse effect on our results of operations or financial condition.

We have assets which may not be fully recoverable or realizable, which could adversely affect our results of operations or financial condition.

If our business does not perform well or as initially anticipated in our assumptions, we may be required to accelerate amortization or recognize an impairment loss on intangible assets or long-lived assets or to establish a valuation allowance against the deferred income tax asset.

We have intangible assets such as deferred acquisition costs (DAC), value of business acquired (VOBA), and goodwill. DAC and VOBA are currently amortized based primarily upon expected future premium income of the related insurance policies. Recoverability testing for DAC and VOBA is performed on an annual basis. Insurance contracts are grouped on a basis consistent with our manner of acquiring, servicing, and measuring profitability of the contracts. If recoverability testing indicates that either DAC and/or VOBA are not recoverable, the deficiency is charged to expense. Effective January 1, 2023, with the adoption of ASU 2018-12, DAC will be amortized on a constant level basis and no longer require recoverability testing. See "Accounting Developments" included herein in Part 2, Item 7 under "Management's Discussion and Analysis of Financial Condition and Results of Operations" and Note 1 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for additional discussion.

Goodwill is not amortized, but on an annual basis, or more frequently if necessary, we review the carrying amount of goodwill for indications of impairment, considering in that review the financial performance and other relevant factors. In accordance with accounting guidance, we test for impairment at either the operating segment level or one level below. In addition, certain events including, but not limited to, a significant adverse change in legal factors or the business environment, an adverse action by a regulator or rating agency, or unanticipated competition would cause us to review goodwill for impairment more frequently than annually.

Long-lived assets, including assets such as real estate, right-of-use assets, and information technology software, also may require impairment testing to determine whether changes in circumstances indicate that we may be unable to recover the carrying amount.

We assess our deferred tax assets to determine if they are realizable. Factors in our determination include the performance of the business, including the ability to generate future taxable income and the fair value of our investment portfolio. Significant declines in the fair value of our investments could result in the recognition of a valuation allowance on our deferred tax asset. If based on available information, it is more likely than not that the deferred income tax asset will not be realized, a valuation allowance is established.

Charges such as accelerated amortization, impairment losses, or the establishment of valuation allowances could have a material adverse effect on our results of operations or financial condition.

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See "Critical Accounting Estimates" included in "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7, and Note 13 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

Market and Credit Risks

Sustained periods of low interest rates in the long-term investment market may adversely affect our reported net investment income and the discount rates used in pricing our insurance products and projecting our pension obligations, which may adversely affect our results of operations or financial condition.

Declines in interest rates or sustained periods of low interest rates and yields on fixed income investments may cause the rates of return on our investment portfolio to decrease more than expected, leading to lower net investment income than assumed in the pricing and reserving for our insurance products. An interest, or discount, rate is used in calculating reserves and determining pricing for our insurance products. We set our GAAP discount rate assumptions based on our current and expected future investment yield for assets supporting the reserves, considering current and expected future market conditions. If the discount rate assumed in our reserve calculations and our pricing is higher than our future investment returns, our invested assets may not earn enough investment income to support our future claim payments. In that case, the reserves may eventually be insufficient, resulting in the need to increase our reserves and/or contribute additional capital to our insurance subsidiaries, either of which could have a material adverse effect on our results of operations or financial condition.

Effective January 1, 2023, with the adoption of ASU 2018-12, among other changes required by the update, we will be required to update the discount rate assumption used to set our GAAP reserves at each reporting date using a yield that is reflective of an upper-medium grade fixed-income instrument. See "Accounting Developments" included herein in Part 2, Item 7 under "Management's Discussion and Analysis of Financial Condition and Results of Operations" for additional discussion.

We are also required to perform annual statutory adequacy testing that considers multiple interest rate scenarios, to ensure our statutory reserves continue to meet statutory requirements, which could require us to increase our statutory reserves and/or contribute additional capital to our insurance subsidiaries.

Our net periodic benefit costs and the value of our benefit obligations for our pension plans are determined based on a set of economic and demographic assumptions that represent our best estimate of future expected experience. Major assumptions used in accounting for these plans include the expected discount (interest) rate and the long-term rate of return on plan assets. We set the discount rate assumption at the measurement date for each of our plans to reflect the yield of a portfolio of high quality fixed income corporate debt instruments matched against the timing and amounts of projected future benefits. A change in the discount rate impacts the present value of benefit obligations and our costs. Our expectations for the future investment returns on plan assets are based on a combination of historical market performance, current market conditions, and future capital market assumptions obtained from external consultants and economists. The actual rate of return on plan assets is determined based on the fair value of the plan assets at the beginning and end of the measurement period. Increases or decreases in long-term interest rates as well as equity market volatility will impact the fair value of our plan assets and may result in a decrease in the funded status of our pension plans and/or increased pension costs, which may adversely affect our results of operations, financial condition, or liquidity.

Unfavorable economic or market conditions may result in lower sales, lower premium growth and persistency, higher claims incidence, unfavorable mortality, longer claims duration, and higher expenses which may adversely affect our results of operations or financial condition.

We are affected by conditions in the capital markets and the general economy, primarily in the United States, the United Kingdom, Poland, and to a lesser extent, the broader global financial markets. Negative developments in the capital markets and/or the general economy could adversely affect our business, including our investment portfolio, and results of operations.

Factors such as unemployment levels, consumer confidence levels, consumer spending, business investment, government spending, the volatility and strength of the capital markets, inflation, pandemics, and the threat of terrorism all affect the business and economic environment and, ultimately, the amount and profitability of our businesses. In particular, the recent high level of inflation may continue to result in higher expenses and negatively affect the discretionary spending of our customers, which could result in lower sales. More generally, given the nature of our products, in an economic environment characterized by higher unemployment, lower personal income, reduced consumer spending, and lower corporate earnings and investment, new product sales may be adversely affected. Our premium growth may also be negatively impacted by lower

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premium growth from existing customers due to lower salary growth and lower growth in the number of employees covered under an existing policy. In addition, during such periods we may experience higher claims incidence, longer claims duration, and/or an increase in policy lapses, any of which could have a material adverse effect on our results of operations or financial condition.

In addition to interest rate risk as previously discussed, we are exposed to other risks related to our investment portfolio which may adversely affect our results of operations, financial condition, or liquidity.

Default Risk

Our investment portfolio consists primarily of fixed maturity securities. These securities are issued by both domestic and foreign entities and are backed either by collateral or the credit of the underlying issuer. Factors such as an economic downturn or political change in the country of the issuer, a regulatory change pertaining to the issuer's industry, a significant deterioration in the cash flows of the issuer, unforeseen accounting irregularities or fraud committed by the issuer, widening risk spreads, ratings downgrades, a change in the issuer's marketplace or business prospects, or other events that adversely affect the issuers of these securities may result in the issuer defaulting on its obligations.

Our mortgage loan portfolio has default risk. Events or developments, such as economic conditions that impact the ability of tenants to pay their rents or limit the availability of refinancing, may have a negative effect on our mortgage loan portfolio. Events or developments that have a negative effect on any particular geographic region or sector may have a greater adverse effect on an investment portfolio to the extent that the portfolio is concentrated in that region or sector.

A default results in the recognition of an impairment loss on the investment. A default may also adversely affect our ability to collect principal and interest due to us. The probability of credit downgrades and defaults increases when the fixed income markets experience periods of volatility and illiquidity.

Credit Spread Risk

Our exposure to credit spreads, which is the yield above comparable U.S. Treasury securities, primarily relates to market price and cash flow variability associated with changes in credit spreads. A widening of credit spreads may unfavorably impact the net unrealized gain or loss position of the investment portfolio and may adversely impact liquidity. Credit spread tightening may reduce net investment income associated with new purchases of fixed income securities.

Valuation Risk

We report our fixed maturity securities and certain other financial instruments at fair value. Valuations may include inputs and assumptions that are less observable or require greater estimation, particularly during periods of market disruption, resulting in values which may be less than the value at which the investments may ultimately be sold. Further, rapidly changing and unprecedented credit and equity market conditions could materially impact the valuation of securities as reported in our financial statements, and the period to period changes in value could vary significantly. Decreases in value may have a material adverse effect on our results of operations or financial condition.

We evaluate our investment portfolio for credit losses. There can be no assurance that we have accurately assessed the level of credit losses taken. Additional credit losses may need to be taken in the future, and historical trends may not be indicative of future credit losses. Any event reducing the value of our securities may have a material adverse effect on our business, results of operations, or financial condition.

Market Timing and Liquidity Risk

While we attempt to match our asset cash flows and durations with expected liability cash flows and durations to meet the funding requirements of our business, there may at times be a lack of appropriate investments in the market which can be acquired. In particular, due to the long duration of our long-term care product, the timing of our investment cash flows do not match those of our maturing liabilities. In addition, we may, in certain circumstances, need to sell investments due to changes in regulatory or capital requirements, changes in tax laws, rating agency decisions, and/or unexpected changes in liquidity needs. There may also be a limited market for certain of our investments, such as our private equity partnerships, private placement fixed maturity securities, mortgage loans, and policy loans, which makes them more illiquid. In periods of market volatility or disruption, other of our securities may also experience reduced liquidity. If events occur wherein we need to sell

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securities in an unfavorable interest rate or credit environment or need to quickly sell securities which are illiquid, market prices may be lower than what we might realize under normal circumstances, with a resulting adverse effect on our results of operations, financial condition, or liquidity.

The effectiveness and utilization of our hedging programs may be affected by changes in forecasted cash flows, the economic environment, changes in interest rates, capital market volatility, non-performance by our counterparties, changes in the level of required collateral, or regulation, which may adversely affect our results of operations, financial condition, or liquidity.

We use derivative financial instruments to help us manage various risks related to our business operations including interest rate risk, risk related to matching duration for our assets and liabilities, foreign currency risk, credit risk, and equity risk. Factors associated with derivative financial instruments could adversely affect our results of operations, financial condition, or liquidity. Ineffectiveness of our hedges due to changes in expected future events, such as the risk created by uncertainty in the economic environment, changes in forecasted cash flows, or if our counterparties fail or refuse to honor their obligations under these derivative instruments, may have a material adverse effect on our results of operations or financial condition. Capital market turmoil may result in an increase in the risk of non-performance by our counterparties, many of which are financial institutions. Non-performance by our counterparties may force us to unwind hedges, and we may be unable to replace the hedge, thereby leaving the risk unhedged. Under the terms of our hedging contracts, we are required to post collateral and to maintain a certain level of collateral, which may adversely affect our liquidity and could subject us to the credit risk of the counterparty to the extent it holds such collateral. Changes in regulations may have an adverse effect on our ability to execute hedging strategies due to the increased economic cost of derivatives, primarily as a result of more restrictive collateral requirements.

Reinsurance may not be available or affordable, or reinsurers may be unwilling or unable to meet their obligations under our reinsurance contracts, which may adversely affect our results of operations or financial condition.

As part of our overall risk management and capital management strategies, we purchase reinsurance for certain risks underwritten by our various businesses. We also utilize reinsurance to exit certain lines of business. Market conditions beyond our control determine the availability and cost of reinsurance. Any decrease in the amount of reinsurance will increase our risk of loss and may impact the level of capital requirements for our insurance subsidiaries, and any increase in the cost of reinsurance will, absent a decrease in the amount of reinsurance, reduce our results of operations. Accordingly, we may be forced to incur additional expenses for reinsurance or may be unable to obtain sufficient reinsurance on acceptable terms, which may adversely affect our ability to write future business, result in the assumption of more risk with respect to the policies we issue, and increase our capital requirements. The collectability of our reinsurance recoverable is primarily a function of the solvency of the individual reinsurers. We cannot provide assurance that our reinsurers will pay the reinsurance recoverables owed to us or that they will pay these recoverables on a timely basis. The insolvency of a reinsurer or the inability or unwillingness of a reinsurer to comply with the terms of a reinsurance contract may have an adverse effect on our results of operations or financial condition.

Currency translation could materially impact our reported operating results.

The functional currency of our U.K. and Polish operations is the British pound sterling and the Polish zloty, respectively. Fluctuations in exchange rates impact our reported financial results, which may be unfavorably affected when the functional currency weakens. However, it is important to distinguish between translating and converting foreign currency. Except for a limited number of transactions, we do not actually convert our functional currency into dollars. As a result, we view foreign currency translation as a financial reporting item and not a reflection of operations or profitability in the U.K or Poland.

See "Reserves for Policy and Contract Benefits" contained herein in Item 1, "Critical Accounting Estimates" included in "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7, "Interest Rate Risk" contained herein in Item 7A, and Notes 1, 2, 3, 4 and 9 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

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Public Health Risks

Pandemics and other public health issues, including COVID-19, can negatively impact certain aspects of our business and, depending on severity and duration, could have a material adverse effect on our financial position, results of operations, liquidity and capital resources, and overall business operations.

The COVID-19 pandemic continues to cause disruption to the global economy and has resulted in some unfavorable impacts to our company as well as the overall insurance industry. Further events that we are unable to control, such as additional virus mutations, changes in mortality levels, changes in the population impacted by COVID-19, spikes in the number of cases of COVID-19, and the related responses by government authorities and businesses, continue to present risks to our business. An increase in the level of deaths related to COVID-19 could result in higher mortality within our insured population. In addition, we may continue to experience higher claim incidence in our disability products and higher expenses related to our leave management services.

If economic conditions worsen as a result of a pandemic or other public health issue, that may adversely affect the financial condition of current or potential customers, which may result in lower sales or other negative impacts to customer purchasing patterns. If we experience unfavorable developments related to our revenues, benefits, or expenses, we may correspondingly experience adverse impacts to our overall future profitability and growth, which may alter the timing and magnitude of our plans for overall business growth. In addition, these unfavorable developments may result in the impairment or write-off of certain assets such as premiums receivable, goodwill, property and equipment, VOBA, and right-of-use assets, or the establishment of a valuation allowance regarding the realization of our deferred tax assets.

If economic conditions worsen as a result of a pandemic or other public health issue, that may also result in the inability for companies to make interest and principal payments on their debt securities or mortgage loans that we hold for investment purposes. Accordingly, although we maintain a disciplined approach regarding our overall investment strategy, we may still incur significant losses that can result in a decline in net investment income and/or material increases in credit losses on our investment portfolio. With respect to commercial real estate, there could be potential impacts to estimates of expected losses resulting from lower underlying values, reflecting current market conditions at that time.

Although we have access to significant amounts of liquidity, which include a credit facility and our facility agreement for contingent issuance of senior notes, Federal Home Loan Bank (FHLB) arrangements, and the ability to liquidate certain investments, it may be insufficient or even inaccessible if we are not in compliance with required covenants under our borrowing arrangements or if the associated lenders are unable to provide funds. In addition, if investment markets become illiquid or severely impaired, we may be unable to liquidate our investments in a timely and advantageous manner.

From an operational perspective, our employees, sales associates, brokers, and distribution partners, as well as the workforces of our vendors, service providers, and counterparties, may be adversely affected by a pandemic or other public health issue, including government-mandated shutdowns, requests or orders for employees to work remotely, and other social distancing measures. These measures could result in an adverse impact on our ability to conduct our business, including our ability to sell our policies and our ability to adjudicate and pay claims in a timely manner. Additionally, our hybrid work environment may expose us to various additional risks such as elevated cybersecurity vulnerability resulting from the wide-scale remote usage of our company networks and related risks to the effectiveness of our internal controls over financial reporting.

There is no guarantee that processes we have developed in order to adapt to the COVID-19 pandemic would succeed in allowing us to adapt to any future pandemic or other public health issue, which may have materially different characteristics than the COVID-19 pandemic.

To the extent pandemics or other public health issues adversely affect our business, financial position, results of operations, liquidity and capital resources, and overall business operations, it may also have the effect of heightening many of the other risks disclosed herein in this Item 1A "Risk Factors".

See "Executive Summary", "Segment Operating Results", and "Liquidity and Capital Resources" included herein in Part 2, Item 7 under "Management's Discussion and Analysis of Financial Condition and Results of Operations" for additional discussion.

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General Risks

We and our insurance subsidiaries are subject to extensive supervision and regulation. Changes in laws and regulations that affect our industry or findings from examinations and investigations may affect the cost or demand for our products, increase capital and reserving requirements for our insurance subsidiaries, and adversely affect our profitability, liquidity, or growth.

Our insurance subsidiaries are subject to extensive supervision and regulation in the United States and abroad. The primary purpose of insurance regulation is to protect policyholders, not stockholders. To that end, regulatory authorities, including state insurance departments in the United States, the PRA in the United Kingdom, and the KNF in Poland have broad administrative powers over many aspects of the insurance business, including requiring various licenses, permits, authorizations, or accreditations, which our insurance subsidiaries may not be able to obtain or maintain, or may be able to do so only at great cost. In addition, we and our insurance subsidiaries may not be able to comply fully with, or obtain appropriate exemptions from, the wide variety of laws and regulations applicable to insurance companies and insurance holding companies. These laws and regulations can be complex and subject to differing interpretations and are regularly re-examined. Existing or future laws and regulations, and the manner in which they are interpreted or applied, may become more restrictive or otherwise adversely affect our operations. For example, they may restrict or prohibit the payment of dividends by our subsidiaries to us, restrict transactions between subsidiaries and/or between us and our subsidiaries, and may require contributions of capital by us to our insurance subsidiaries even if we are otherwise in compliance with stated requirements. Failure to comply with or to obtain appropriate exemptions under any applicable laws or regulations could result in restrictions on the ability of our insurance subsidiaries to do business in one or more of the jurisdictions in which they operate and could result in fines and other sanctions, which may have a material adverse effect on our business or results of operations.

Regulatory examinations or investigations could result in, among other things, an increase to reserving requirements, changes in our claims handling or other business practices, changes in procedures for the identification and payment to the states of benefits and other property that is not claimed by the owners, changes in the use and oversight of reinsurance, changes in governance and other oversight procedures, assessments by tax authorities or other governing agencies, fines, and other administrative action, which could injure our reputation, adversely affect our issuer credit ratings and financial strength ratings, place us at a competitive disadvantage in marketing or administering our products, impair our ability to sell or retain insurance policies, and/or have a material adverse effect on our results of operations or financial condition.

It is possible that there will be heightened oversight of insurers by regulatory authorities in the jurisdictions in which our insurance subsidiaries are domiciled and operate. We cannot predict specific proposals that might be adopted, or what impact, if any, such proposals or, if enacted, such laws, could have on our business, results of operations, or financial condition. For instance, the NAIC or state regulators may adopt further revisions to statutory reserving standards or the RBC formula, the PRA may revise its capital adequacy requirements and minimum solvency margins, the IAIS may adopt capital requirements to which we could be subject, or rating agencies may incorporate higher capital thresholds into their quantitative analyses, thus requiring additional capital contributions by us to our insurance subsidiaries. We have received permission to follow accounting practices that differ from statutory accounting principles prescribed by the NAIC for certain of our insurance subsidiaries which, if revoked or altered, could have a material adverse effect on our financial condition and possibly trigger a regulatory event. Increased financial services regulation, which could include activities undertaken by the NAIC and regulatory authorities in the U.K., Poland, and the EU may impose greater quantitative requirements, supervisory review, and disclosure requirements and may impact the business strategies, capital requirements, and profitability of our insurance subsidiaries. The U.K. government is now reviewing the regulatory framework of financial services companies which may result in changes to U.K. regulatory capital. The United Kingdom's Financial Ombudsman Service, which was established to help settle disputes between consumers and businesses providing financial services, and the FCA, which has rule-making, investigative, and enforcement powers to protect consumers, may hamper our ability to do business, which could have a material adverse effect on our U.K. operations.

Our financial statements are subject to the application of generally accepted accounting principles, in the United States, the United Kingdom, and Poland, which are periodically revised and/or expanded. Accordingly, we are required to adopt new or revised accounting standards issued by recognized authoritative bodies within these countries, which may also be influenced by the International Accounting Standards Board. Future accounting standards we adopt, including the U.S. Financial Accounting Standards Board's ASU 2018-12 that will be adopted effective January 1, 2023, will change current accounting and disclosure requirements applicable to our financial statements. Such changes will have a material effect on our reported results of operations and financial condition and may impact the perception of our business by external stakeholders including the rating agencies that assign the issuer credit rating on Unum Group.

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We use an affiliated captive reinsurer for the limited purpose of reinsuring risks attributable to specified policies issued or reinsured by one of our insurance subsidiaries in order to effectively manage risks in connection with certain blocks of our business as well as to enhance our capital efficiency. If we were required to discontinue use of the captive reinsurer or to alter the structure of the captive reinsurance arrangement, our ability to maintain current RBC ratios and/or our capital deployment activities could be adversely affected.

Changes in U.S. programs such as healthcare reform, the emergence of paid family and medical leave legislation, and financial services sector reform may compete with or diminish the need or demand for our products, particularly as it may affect our ability to sell our products through employers or in the workplace. The U.S. social security disability insurance program may not be sustainable, which may adversely affect the level of our disability claim payments and reserves. Legislative changes related to pension funding requirements could negatively impact our cash flows from operations and our profitability.

Changes in tax laws and other regulations or interpretations of such laws or regulations could unfavorably impact our corporate taxes. In addition, changes in tax laws could make some of our products less attractive to consumers.

Changes in privacy and cybersecurity laws and regulations may result in cost increases as a result of system implementations, administrative processes, effects of potential noncompliance, and limitations or constraints of our business models.

Changes in laws governing oversight and management of climate change risk may subject us to increased costs.

Most group long-term and short-term disability plans we administer are governed by the Employee Retirement Income Security Act (ERISA). Changes to ERISA enacted by Congress or through judicial interpretations may adversely affect the risk to us of managing employee benefit plans, increase the premiums associated with such plans, and ultimately affect their affordability and our profitability.

The insurance departments in jurisdictions wherein our insurance subsidiaries conduct business may limit our ability to obtain rate increases under guaranteed renewable contracts or could require changes in rates and/or benefits to meet minimum loss ratio requirements which could negatively impact the profitability of our products. Many regulatory and governmental bodies have the authority to review our products and business practices and those of our agents and employees. These regulatory or governmental bodies may bring regulatory or other legal actions against us if, in their view, our practices are improper. These actions could result in substantial fines or restrictions on our business activities and could have a material adverse effect on our business or results of operations. Determination by regulatory authorities that we have engaged in improper conduct may also adversely affect our defense of various lawsuits.

Competition may adversely affect our market share or profitability.

All of our businesses are highly competitive. We believe that the principal competitive factors affecting our business are the quality of our customer's experience regarding service and claims management, integrated product choices, enrollment capabilities, price, financial strength ratings, claims-paying ratings, and a solution to allow customers to comply with the changing laws and regulations related to family medical leave benefits. We compete for new product sales, the retention of existing business, and the ability to attract and retain independent agents and brokers to market our products, all of which affect our profitability. All areas of the employee benefits markets are highly competitive due to the yearly renewable term nature of the group products and the large number of insurance companies offering products in this market. There is a risk that our customers may be able to obtain more favorable terms or improved technology solutions from competitors in lieu of renewing coverage with us, particularly if industry pricing levels do not align with our view of adequate premium rates. We are operating in a dynamic competitive environment of both traditional and non-traditional competitors, with changes in product offerings, enrollment capabilities, and technology solutions. The level and intensity of competition may also grow due to existing competitors becoming more aggressive, and an increase in merger and acquisition activity which may result in larger competitors with greater financial resources. There are many insurance companies which actively compete with us in our lines of business, and there is no assurance that we will be able to compete effectively against these companies and new competitors in the future.

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A decrease in our financial strength or issuer credit ratings may adversely affect our competitive position, our ability to hedge our risks, and our cost of capital or ability to raise capital, which may adversely affect our results of operations, financial condition, or liquidity.

We compete based in part on the financial strength ratings provided by rating agencies. Although we maintain an ongoing dialogue with the rating agencies that assign financial strength ratings to our insurance subsidiaries, the rating agencies may revise the criteria that are used to evaluate the financial strength of our insurance subsidiaries which could lead to placing our rating on "credit watch" or "under review" and ultimately lead to a downgrade. A downgrade of our financial strength ratings may adversely affect us and could potentially, among other things, adversely affect our relationships with distributors of our products and services and retention of our sales force, negatively impact persistency and new sales, and generally adversely affect our ability to compete. A downgrade in the issuer credit rating assigned to Unum Group can be expected to adversely affect our cost of capital and our ability to raise additional capital. If we are downgraded significantly, ratings triggers in our derivatives financial instrument contracts may result in our counterparties enforcing their option to terminate the derivative contracts. Such an event may have a material adverse effect on our financial condition or our ability to hedge our risks.

Events that damage our reputation may adversely affect our business, results of operations, or financial condition.

There are many events which may harm our reputation, including, but not limited to, those discussed in this Item 1A regarding regulatory investigations, legal proceedings, social issues, and cyber or other information security incidents.

In addition, being in the business of insurance, we are paid to accept certain risks. Those who conduct business on our behalf, including executive officers and members of management, sales managers, investment professionals, and to some extent, independent agents and brokers, do so in part by making decisions that involve exposing us to risk. These include decisions such as maintaining effective underwriting and pricing discipline, maintaining effective claim management and customer service performance, managing our investment portfolio and derivatives trading activities, delivering effective technology solutions, complying with established sales practices, executing our capital management strategy, exiting a line of business and/or pursuing strategic growth initiatives, and other decisions. Although we employ controls and procedures designed to monitor business decisions and prevent us from taking excessive risks or unintentionally failing to comply with internal policies and practices such that errors occur, there can be no assurance that these controls and procedures will be effective. If our employees and business associates take excessive risks and/or fail to comply with internal policies and practices, the impact of those events may damage our market position and reputation.

Depending on the severity of the damage to our reputation, we may be unable to effectively compete for new products or retain our existing business, which could adversely affect our results of operations or financial condition. Damage to our reputation may also hinder our ability to raise new capital and/or increase our cost of capital.

Litigation and contingencies are common in our businesses and may result in financial losses and/or harm to our reputation.

We are, and in the future may be, defendants in a number of litigation matters, and the outcome of this litigation is uncertain.  Some of these proceedings have been brought on behalf of various alleged classes of complainants. Plaintiffs in class action and other lawsuits against us may seek very large and/or indeterminate amounts, including punitive and treble damages. An estimated loss is accrued when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated. An adverse outcome in one or more of these actions may, depending on the nature, scope, and amount of the ruling, materially and adversely affect our results of operations or financial condition, encourage other litigation, and limit our ability to write new business, particularly if the adverse outcomes negatively impact certain of our ratings.

As part of our normal operations in managing claims, we are engaged in claim litigation where disputes arise as a result of a denial or termination of benefits. Typically those lawsuits are filed on behalf of a single claimant or policyholder, and in some of these individual actions punitive damages are sought, such as claims alleging bad faith in the handling of insurance claims. For our general claim litigation, we maintain reserves based on experience to satisfy judgments and settlements in the normal course. We expect that the ultimate liability, if any, with respect to general claim litigation, after consideration of the reserves maintained, will not be material to our financial condition. Nevertheless, given the inherent unpredictability of litigation, it is possible that an adverse outcome in certain claim litigation involving punitive damages may, from time to time, have a material adverse effect on our results of operations. We are unable to estimate a range of reasonably possible punitive losses.

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Our actions to incorporate environmental, social, and governance standards may not meet expectations of investors, regulators, customers, employees, and other stakeholders.

Our sustainability strategic framework creates long-term value for stakeholders by implementing business practices that incorporate environmental, social, and governance (ESG) factors, with a focus on accelerating our efforts around responsible investments, inclusive products and services, and reducing environmental impact. We include ESG considerations in our fundamental investment analysis of the companies or projects we invest in to ensure that their values or agendas align with our own and those of our stakeholders. Investors, regulators, current and prospective customers, employees, and other stakeholders may evaluate our business according to certain ESG standards and expectations. As our ESG framework matures and we continue to integrate ESG standards in coordination with other business priorities, our ESG-related efforts may not prove completely effective or may not satisfy our key stakeholders. Additionally, some of our regulators have proposed new rules, which would be subject to differing interpretations and would require the development of new processes and controls that may be complex and result in increases in expenses in order to ensure compliance.

See "Reserves for Policy and Contract Benefits", "Competition", "Regulation" and "Ratings" contained herein in Item 1, "Executive Summary" and "Critical Accounting Estimates" included in "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7, and Notes 1, 6, 7, and 14 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

Operational Risks

We may be unable to hire and retain qualified employees which may adversely affect our business, results of operations, or financial condition.

The talent and contributions of our employees are critical to meeting our business needs. Our future success depends on our ability to hire and retain qualified personnel. In recent periods we have experienced higher turnover compared to our historical experience, as many employees seek higher wages, new careers, or choose to exit the workforce entirely. The greater opportunities for fully remote or hybrid working arrangements have contributed to this trend, as many employees are no longer limited to employers located in their local area. We have taken steps to address this challenge, including updating compensation structures, allowing for more hybrid or remote working arrangements, and taking advantage of opportunities to recruit highly skilled employees from other employers. However, any prolonged stress on our ability to retain or recruit employees may result in increased labor costs and could adversely affect our ability to conduct and manage our business.

A cyber attack or other security breach could disrupt our operations, result in the unauthorized disclosure or loss of confidential data, damage our reputation or relationships, and expose us to significant financial and legal liability, which may adversely affect our business, results of operations, or financial condition.

We store confidential information about our business and our policyholders, employees, agents, and others on our information technology systems, including proprietary and personally identifiable information. As part of our normal business operations, we use this information and engage third-party providers, including outsourcing, cloud computing, and other business partners, that store, access, process, and transmit such information on our behalf. We devote significant resources and employ security measures to help protect our information technology systems and confidential information, and we have programs in place to detect, contain, and respond to information security incidents. However, because the techniques used to obtain unauthorized access, disable or degrade service, or sabotage systems change frequently and may be difficult to detect for long periods of time, we and our third-party providers may be unable to anticipate these techniques or implement adequate preventative measures. In addition, hardware, software, or applications we develop or procure from third parties or through open source solutions may contain defects in design or manufacture or other problems that could unexpectedly compromise our information security. Unauthorized parties, whether within or outside our company, may disrupt or gain access to our systems, or those of third parties with whom we do business, through human error, misfeasance, fraud, trickery, or other forms of deceit, including break-ins, use of stolen credentials, social engineering, phishing, or other cyber attacks, computer viruses, malicious codes, and similar means of unauthorized and destructive tampering. Specifically, we have seen an increase in the number and sophistication of phishing attacks that seek access to our systems through emails sent to our employees. We have taken action to provide additional training to increase awareness of the potential for these attacks among our workforce.

We and our third-party providers have experienced and likely will continue to experience information security incidents from time to time. Although known incidents have not had a material effect on our business or financial condition, there is no assurance that our security systems and measures will be able to prevent, mitigate, or remediate future incidents that could have such an effect. A successful penetration or circumvention of the security of our information technology systems, or those of

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third parties with whom we do business, including a ransomware attack that locks or freezes systems until the payment of a ransom, could cause serious negative consequences for us, including significant disruption of our operations, unauthorized disclosure or loss of confidential information, harm to our brand or reputation, loss of customers and revenues, violations of privacy and other laws, and exposure to litigation, monetary damages, regulatory enforcement proceedings, fines, and potentially criminal proceedings and penalties. If we are unaware of the incident for some time after it occurs, our exposure could increase. In addition, the costs to address or remediate systems disruptions or security threats or vulnerabilities, whether before or after an incident, could be significant. As we continue to build our digital capabilities and focus on enhancing the customer experience, the amount of information that we retain and share with third parties, as well as our reliance on them, is likely to grow, increasing the cost to prevent data security breaches and the cost and potential consequences of such breaches. An information technology systems failure could also interfere with our ability to comply with financial reporting and other regulatory requirements, exposing us to potential disciplinary action by regulators. Further, successful cyber-attacks at other large financial institutions or other market participants, whether or not we are affected, could lead to a general loss of customer and investor confidence in financial institutions that could negatively affect us.

Although we have insurance against some cyber risks and attacks, we may be subject to litigation and financial losses that exceed our policy limits, are subject to deductibles or are not covered under any of our current insurance policies.

The failure of our business recovery and incident management processes to resume our business operations in the event of a natural catastrophe, cyber attack, or other event could adversely affect our profitability, results of operations, or financial condition.

In the event of a disaster such as a natural catastrophe, an epidemic/pandemic, a cyber attack, cyber security breach or other information technology systems failure, a terrorist attack, or war, unanticipated problems with our disaster recovery systems could have a material adverse impact on our ability to conduct business and on our results of operations and financial condition, particularly if those problems affect our information technology systems and destroy valuable data or result in a significant failure of our internal control environment. In addition, in the event that a significant number of our employees were unavailable in the event of a disaster, our ability to effectively conduct business could be severely compromised.

The failure of our information technology and/or disaster recovery processes or systems for any reason could cause significant interruptions or malfunctions in our or our customers’ operations and result in the loss, theft, or failure to maintain the security, confidentiality, or privacy of sensitive data, including personal information relating to our customers. Such a failure could harm our reputation, subject us to regulatory sanctions, legal claims, and increased expenses, and lead to a loss of customers and revenues.

Our failure to develop digital capabilities or to effectively execute upgrades to or replacements of information technology systems could impair our ability to deliver on our growth initiatives or administer our business, which may adversely affect our business, results of operations, or financial condition.

Our business plans increasingly rely on digital capabilities to meet or surpass customer expectations, simplify our operations, and deliver innovative product and service offerings. If we are unable to effectively develop and offer digital capabilities that enhance our customers' experience, we may not fully achieve our strategic growth initiatives and may also experience the loss of existing business. Although we believe we have information technology systems which adequately support our business needs, we continually upgrade our existing information technology systems and acquire or develop new systems to keep pace with the rapidly changing business and technology environment. There are risks involved with upgrading or replacing information technology systems, including, but not limited to, data loss, data errors, and disruption to our operations. We seek to monitor and control our exposure to the risks arising out of these activities through our risk control framework which encompasses a variety of reporting systems, internal controls, management review processes, and other mechanisms.

Unum Group depends on funds from its subsidiaries to meet its obligations and pay dividends. The ability of our subsidiaries to transfer funds to Unum Group may be impaired by adverse financial results or a change in capital requirements. Accordingly, internal sources of capital and liquidity may not always be sufficient. If we need to seek external capital, adverse market conditions may affect our access to capital or our cost of capital.

Unum Group is a holding company for insurance and other subsidiaries and has limited operations of its own. Our insurance subsidiaries are subject to insurance laws and regulatory limitations on the payment of dividends and on other transfers of funds or other assets to affiliates, including to Unum Group. The level of earnings and capital in our subsidiaries, as well as business conditions and rating agency considerations, could impact our insurance and other subsidiaries' ability to pay dividends or to make other transfers of funds to Unum Group, which could impair our ability to pay dividends to Unum Group's common

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stockholders, meet our debt and other payment obligations, and/or repurchase shares of Unum Group's common stock. The use of funds held by Unum Group as consideration in any acquisition could affect our capital plan and render those funds unavailable for other corporate purposes.

A change in demand for our insurance products or an increase in the incidence of new claims or the duration of existing claims could negatively impact our cash flows from operations. Deterioration in the credit market, which could delay our ability to sell our positions in certain of our fixed maturity securities in a timely manner, could also negatively impact our cash flows. Regulatory changes such as those discussed herein in this Item 1A may impose higher capital or reserve requirements on our insurance subsidiaries, increase collateral requirements for certain of our derivatives transactions, and/or implement other requirements which could unfavorably affect our liquidity. Without sufficient liquidity, our ability to maintain and grow our operations would be limited. If our internal sources of liquidity prove to be insufficient, we may be unable to successfully obtain additional financing and capital on favorable terms, or at all, which may adversely affect us.

If our financial results are unfavorable, we may need to increase our capital in order to maintain our credit ratings or satisfy regulatory requirements. Maintaining appropriate levels of statutory surplus is considered important not only by us but by insurance regulatory authorities in the U.S., the PRA in the U.K., the KNF in Poland, and the rating agencies that rate insurers' claims-paying abilities and financial strength. Failure to maintain certain levels of statutory surplus could result in increased regulatory scrutiny, action by regulatory authorities, or a downgrade by the rating agencies. Need for additional capital may limit a subsidiary's ability to distribute funds to our holding companies.

Obtaining financing for even a small amount of capital could be challenging in unfavorable market conditions and during periods of economic uncertainty. The markets may exert downward pressure on availability of liquidity and credit capacity for certain issuers. The availability of financing will depend on a variety of factors such as market conditions, the general availability of credit, the overall availability of credit to the financial services industry, our credit ratings and credit capacity, and the possibility that customers or lenders could develop a negative perception of our financial prospects. Similarly, our access to funds may be impaired if regulatory authorities or rating agencies take negative actions against us. Raising capital in unfavorable market conditions could increase our interest expense or negatively impact our shareholders through increased dilution of their common stock in Unum Group.

We maintain our credit facility as a potential source of liquidity. Our right to borrow funds under this facility is subject to financial covenants, negative covenants, and events of default. Our ability to borrow under this facility is also subject to the continued willingness and ability of the lenders to provide funds. Our failure to comply with the covenants in the credit facility or the failure of lenders to fund their lending commitments would restrict our ability to access the facility when needed, with a resulting adverse effect on our results of operations, financial condition, or liquidity.

The use and reliance on third-party vendors, including vendors providing web and cloud-based applications, may disrupt our business, and impact our ability to leverage data.

We utilize third-party vendors to provide certain business support services. The reliance on these third-party vendors exposes us to the risk that we cannot control the information systems, facilities, or networks of such third-party vendors. We employ substantial third-party risk management measures designed to mitigate this risk, which include, but are not limited to, security and vulnerability assessments of these third-party vendors as well as robust contractual protections. However, if the information systems, facilities, or networks of a third-party vendor are disrupted, damaged, or fail, we are at risk of being unable to meet legal, regulatory, financial or customer obligations. We could also be adversely affected by a third-party vendor who fails to provide contracted services. In this case, this could lead to lower sales, increased costs, and a disruption to our business operations or damage our reputation. Lastly, as certain third-party vendors may conduct operations outside of the U.S., political and military events in foreign jurisdictions could have an adverse effect on our operations.

Our risk management program may leave us exposed to unidentified or unanticipated risk, which could negatively affect our business.

We have devoted significant resources to develop our enterprise risk management program, which has the objective of managing our strategic, market, credit, public health, insurance, and operations risks, which ultimately impact our reputational risk. However, our program may not be comprehensive, and our methods for monitoring and managing risk may not fully predict or mitigate future exposures. In this case, there may be a negative impact to our business, results of operations, or financial condition.

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See "Regulation" contained herein in Item 1,"Critical Accounting Estimates" and "Liquidity and Capital Resources" included in "Management's Discussion and Analysis of Financial Condition and Results of Operations" contained herein in Item 7, "Quantitative and Qualitative Disclosures About Market Risk" contained herein in Item 7A, and Notes 8, 14, and 16 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

ITEM 1B. UNRESOLVED STAFF COMMENTS

None

ITEM 2. PROPERTIES

As of December 31, 2022, we owned office space comprised of five campuses located in Chattanooga, Tennessee; Portland, Maine; Columbia, South Carolina; Baton Rouge, Louisiana; and Dorking in the United Kingdom. In addition, as of December 31, 2022, we leased office space in various locations throughout the United States, the United Kingdom, Ireland, and Poland. Substantially all of the properties owned or leased are used by one or more of our five reporting segments, depending on the location. We believe our properties and facilities are suitable and adequate for current operations.

ITEM 3. LEGAL PROCEEDINGS

Refer to Note 14 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for information on legal proceedings.

ITEM 4. MINE SAFETY DISCLOSURES

Not Applicable

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PART II

ITEM 5. MARKET FOR REGISTRANT'S COMMON EQUITY, RELATED STOCKHOLDER MATTERS AND ISSUER PURCHASES OF EQUITY SECURITIES

Common stock of Unum Group is traded on the New York Stock Exchange. The stock symbol is UNM. Quarterly dividends declared and paid per share of common stock are as follows:

2022
4th Quarter	$	0.330
3rd Quarter	0.330
2nd Quarter	0.300
1st Quarter	0.300
2021
4th Quarter	$	0.300
3rd Quarter	0.300
2nd Quarter	0.285
1st Quarter	0.285

Our board of directors has the authority to declare cash dividends on shares of our common stock. In determining dividends, the board takes into account a number of factors including our financial condition and results of operations, regulatory limitations on the payment of dividends from subsidiaries, cash requirements, general economic conditions, and other factors the board may deem relevant.  For information on restrictions relating to our subsidiaries' ability to pay dividends to Unum Group and certain of its intermediate holding company subsidiaries, see "Liquidity and Capital Resources - Cash Available from Subsidiaries" contained herein in Item 7 and Note 16 of the "Notes to Consolidated Financial Statements" contained herein in Item 8. For information relating to compensation plans under which Unum Group's equity securities are authorized for issuance, see Item 12 contained herein.

As of February 21, 2023, there were 7,840 registered holders of common stock. 

The following table provides information about our share repurchase activity for the fourth quarter of 2022.

	(a) Total Number of Shares Purchased	(b) Average Price Paid per Share (1)		(c) Total Number of Shares Purchased as Part of Publicly Announced Program (2)	(d) Approximate Dollar Value of Shares that May Yet Be Purchased Under the Program (2)
October 1 - October 31, 2022	302,916	$	43.98	302,916	$	49,147,153
November 1 - November 30, 2022	605,225	42.42		605,225	23,474,196
December 1 - December 31, 2022	579,731	40.49		579,731	—
Total	1,487,872			1,487,872

(1) The average price paid per share excludes the cost of commissions.

(2) In October 2021, our board of directors authorized the repurchase of up to $250.0 million of Unum Group's outstanding common stock. The October 2021 share repurchase program expired on December 31, 2022. In December 2022, our board of directors authorized the repurchase of up to $200.0 million of Unum Group's outstanding common stock beginning on January 1, 2023. In February 2023, our board of directors authorized an increase to the share repurchase program such that we are now authorized to repurchase up to $250.0 million of Unum Group's outstanding common stock. This share repurchase program has an expiration date of December 31, 2023.

ITEM 6. [RESERVED]

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ITEM 7. MANAGEMENT'S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS

The discussion and analysis presented in this section should be read in conjunction with the "Cautionary Statement Regarding Forward-Looking Statements" included below the Table of Contents, "Risk Factors" included herein Item 1A, and the Consolidated Financial Statements and notes thereto included in Item 8.

Executive Summary

2022 Operating Performance and Capital Management

For 2022, we reported net income of $1,314.2 million, or $6.50 per diluted common share, compared to net income of $824.2 million, or $4.02 per diluted common share, in 2021.

Included in our results for 2022 are:

•A net investment loss of $15.7 million before tax and $12.2 million after tax, or $0.07 per diluted common share;

•Amortization of the cost of reinsurance of $63.8 million before tax and $50.4 million after tax, or $0.25 per diluted common share;

•A reserve decrease related to assumption updates of $155.0 million before tax and $122.5 million after tax, or $0.61 per diluted common share;

Included in our results for 2021 are:

•A net investment gain, excluding the net realized investment gain related to the second phase of the Closed Block individual disability reinsurance transaction, of $9.1 million before tax and $7.2 million after tax, or $0.03 per diluted common share;

•The impact from the second phase of the Closed Block individual disability reinsurance transaction, which resulted in a net loss of $71.7 million before tax and $56.7 million after tax, or $0.27 per diluted common share;

•Amortization of the cost of reinsurance of $79.1 million before tax and $62.3 million after tax, or $0.31 per diluted common share;

•A net reserve decrease related to assumption updates of $181.4 million before tax and $143.3 million after tax, or $0.70 per diluted common share;

•An impairment loss on internal-use software of $12.1 million before tax and $9.6 million after tax, or $0.05 per diluted common share;

•Cost related to the early retirement of debt of $67.3 million before tax and $53.2 million after tax, or $0.26 per diluted common share;

•An impairment loss on the right-of-use (ROU) asset related to one of our operating leases of $13.9 million before tax and $11.0 million after tax, or $0.05 per diluted common share;

•Tax expense related to a U.K. tax rate increase of $24.2 million or $0.12 per diluted common share.

Excluding these items, after-tax adjusted operating income for 2022 was $1,254.3 million, or $6.21 per diluted common share compared to $890.7 million, or $4.35 per diluted common share for 2021. See "Reconciliation of Non-GAAP and Other Financial Measures" contained herein in this Item 7 for a reconciliation of these items.

Our Unum US segment reported an increase in income before income tax and net investment gains and losses of 65.6 percent in 2022 compared to 2021, which includes the reserve decreases related to the assumption updates during the third quarter of 2022 and 2021. Excluding these items, our Unum US segment reported an increase in adjusted operating income of 108.8 percent in 2022 compared to 2021, due to favorable benefits experience, particularly in our group product lines, and an increase in premium income, partially offset by higher operating expenses and lower net investment income. The benefit ratio, excluding the previously discussed reserve decreases, for our Unum US segment for 2022 was 65.5 percent, compared to 74.9 percent in 2021. Unum US sales increased 18.4 percent in 2022 compared to 2021. See "Reserve Assumption Updates" contained herein for further discussion.

Our Unum International segment reported an increase in adjusted operating income, as measured in U.S. dollars, of 20.2 percent in 2022 compared to 2021. As measured in local currency, our Unum UK line of business reported an increase in adjusted operating income of 37.7 percent compared to 2021 due to higher premium income and higher net investment income, partially offset by higher operating expenses and unfavorable benefits experience. The benefit ratio for our Unum UK line of business

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was 81.1 percent in 2022 compared to 79.6 percent in 2021. Unum International sales, as measured in U.S. dollars, increased 26.4 percent in 2022 compared to 2021. Unum UK sales, as measured in local currency, increased 43.5 percent in 2022 compared to 2021.

Our Colonial Life segment reported an increase in adjusted operating income of 13.8 percent in 2022 compared to 2021 due primarily to favorable benefits experience, partially offset by higher operating expenses and lower net investment income. The 2022 benefit ratio for Colonial Life was 47.2 percent, compared to 53.9 percent in 2021. Colonial Life sales increased 5.9 percent in 2022 compared to 2021.

Our Closed Block segment reported an increase in income before income tax and net investment gains and losses of 29.0 percent in 2022, which includes the amortization of the cost of reinsurance, compared to 2021, which includes reserve increases related to the assumption updates, the impact related to the second phase of the Closed Block individual disability reinsurance transaction, and the amortization of the cost of reinsurance. Excluding these items, our Closed Block segment reported a decrease in adjusted operating income of 37.2 percent in 2022 compared to 2021. The long-term care interest adjusted loss ratio for 2022 was less favorable compared to 2021, which excludes the reserve increase related to the assumption update in the third quarter of 2021. See "Reserve Assumption Updates" and "Closed Block Individual Disability Reinsurance Transaction" contained herein for further discussion.

A rising interest rate environment could continue to positively impact our yields on new investments, but could also continue to create unrealized losses in our current holdings. Our net investment income has been pressured as the majority of our investments were made at a decreasing level of interest rates indicative of the prevailing trend over the last decades. As of December 31, 2022, we do not hold any securities with a decline in fair value below amortized cost which we intend to sell and it is not more likely than not that we will be required to sell before recovery in amortized cost. The net unrealized loss on our fixed maturity securities was $3.0 billion at December 31, 2022, compared to a $5.9 billion net unrealized gain at December 31, 2021, with the decrease due primarily to an increase in U.S. Treasury rates and credit spreads. The earned book yield on our investment portfolio decreased to 4.57 percent for 2022 compared to a yield of 4.85 percent for 2021.

We believe our capital and financial positions are strong. At December 31, 2022, the RBC ratio for our traditional U.S. insurance subsidiaries, calculated on a weighted average basis using the NAIC Company Action Level formula, was approximately 420 percent, which is in line with our expectations. We repurchased 5.7 million shares of Unum Group common stock under our share repurchase program, at a cost of approximately $200 million during 2022. Our weighted average common shares outstanding, assuming dilution, equaled 202.1 million for 2022 compared to 204.8 million for 2021. As of December 31, 2022, Unum Group and our intermediate holding companies had available holding company liquidity of $1,571 million that was held primarily in bank deposits, commercial paper, money market funds, corporate bonds, municipal bonds, and asset-backed securities.

Coronavirus Disease 2019 (COVID-19)

COVID-19 continues to cause disruption to the global economy and has unfavorably impacted our company as well as the overall insurance industry. During 2022, we experienced lower mortality in our life products lines, resulting primarily from lessening impacts of COVID-19 on our insured population compared to 2021. Due to the volatile and unprecedented nature of these events, we still cannot fully estimate the ultimate impact of the COVID-19 pandemic. We continue to closely monitor pandemic trends that have and may continue to have adverse impacts on our business.

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Inflation Reduction Act

In August 2022, the Inflation Reduction Act (IRA) was signed into law in the U.S. and includes certain corporate tax provisions effective January 1, 2023. It imposes a new 15 percent corporate alternative minimum tax (CAMT) on adjusted financial statement income (AFSI) on corporations that have average AFSI over $1.0 billion in any prior three-year period, starting with years 2020 to 2022. We anticipate that our company will be an applicable corporation as early as 2023. We do not expect that any CAMT incurred would impact earnings since it would be offset with a credit toward regular income tax in subsequent years. We continue to monitor the ongoing guidance issued by the United States Treasury. The IRA also imposes a one percent excise tax on the fair market value of corporate stock repurchases after December 31, 2022. This excise tax would be recorded as part of the cost basis of treasury stock. We have not recorded any tax impact from the enactment of the IRA as of December 31, 2022.

Reserve Assumption Updates

During the third quarter of 2022, we completed our annual review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during the third quarter of 2022, we updated our reserve assumptions to reflect our current estimate of future benefit obligations and determined that our claim reserves in our Unum US group long-term disability product line and our waiver of premium reserves for our Unum US group life product line should be reduced by $121.0 million and $34.0 million before tax, or $95.6 million and $26.9 million after tax, respectively, due primarily to sustained improvement in claim recovery trends since our last assumption update, partially offset by lower social security benefit offsets for our group long-term disability product line.

During the third quarter of 2022, we increased our claim reserves for the reinsured portion of our Closed Block individual disability product line by $193.9 million before tax, or $153.2 million after tax, resulting primarily from updates to mortality assumptions for the advanced age portion of our claimant population. This increase is entirely related to the block that was ceded as a part of the Closed Block individual disability reinsurance transaction with Commonwealth Annuity and Life Insurance Company (Commonwealth) and as a result, a corresponding increase was reported in our consolidated balance sheet as a reinsurance recoverable. There was no net impact on our consolidated results of operations for the period. The amortization of the cost of reinsurance related to the Closed Block individual disability reinsurance transaction is based upon expected claim reserve patterns and as such there was a resulting change in the timing of the amortization of the cost of reinsurance.

During the third quarter of 2021, we completed our annual review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during the third quarter of 2021, we updated our reserve assumptions to reflect our current estimate of future benefit obligations and determined that our claim reserves should be reduced by $215.0 million before tax, or $169.9 million after tax, in our Unum US group long-term disability product line due primarily to sustained improvement in claim recovery trends since our last assumption update. We also increased our claim reserves for our Closed Block long-term care and individual disability product lines by $2.1 million and $6.4 million before tax, or $1.7 million and $5.1 million after tax, respectively. We determined that our policy reserves should be increased by $25.1 million before tax, or $19.8 million after tax, in our Closed Block group pension product line to reflect updated discount rate assumptions.

During the fourth quarter of 2020, we completed our annual review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during the fourth quarter of 2020, we updated our reserve assumptions to reflect our current estimate of future benefit obligations and determined that our gross policy and claim reserves should be increased by $151.5 million before tax, or $119.7 million after tax, for our Closed Block long-term care product line due primarily to an update to our interest rate assumptions, partially offset by favorable premium rate increase approvals and inventory updates. Also during the fourth quarter of 2020, we updated our reserve assumptions and determined that our policy and claim reserves should be increased by $17.5 million before tax, or $13.8 million after tax, in our Closed Block group pension product line to reflect updated discount rate assumptions.

For further information related to the reserve assumption updates, see "Trends in Key Assumptions" contained herein in the "Critical Accounting Estimates" of this Item 7 and Note 6 of the "Notes to Consolidated Financial Statements" contained in Item 8.

Impairment Loss on Internal-Use Software

During the third quarter of 2021, we recognized an impairment loss of $12.1 million before tax, or $9.6 million after tax, for previously capitalized internal-use software that we no longer plan to utilize. We determined that this internal-use software

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would no longer be developed in order to focus our efforts on the development of software that better supports our long-term strategic goals. For further information related to the impairment loss on internal-use software, see Note 13 of the "Notes to Consolidated Financial Statements" contained in Item 8.

Impairment Losses on ROU Asset

During the second quarters of 2021 and 2020, we recognized impairment losses of $13.9 million and $12.7 million before tax, or $11.0 million and $10.0 million after tax, on the ROU asset related to one of our operating leases for office space that we do not plan to continue using to support our general operations. The impairment loss was recorded as a result of a decrease in the fair value of the ROU asset compared to its carrying value. For further information related to the impairment losses on the ROU asset, see Note 15 of the "Notes to Consolidated Financial Statements" contained in Item 8.

U.K. Tax Law Change

In June 2021, the Finance Act 2021 was enacted, resulting in a U.K. tax rate increase from 19 percent to 25 percent, effective April 1, 2023, which resulted in $24.2 million of additional tax expense in operating earnings for the revaluation of our deferred tax assets and liabilities in 2021. The U.K. tax rate increase may cause volatility in our effective tax rate prior to the April 1, 2023 effective date as a result of changes in the deferred tax balance related to our Unum UK business. In July 2020, the Finance Act 2020 was enacted, resulting in a U.K. tax rate increase from 17 percent to 19 percent, retroactively effective April 1, 2020, which resulted in $9.3 million of additional tax expense in operating earnings for the revaluation of our deferred tax assets and liabilities in 2020.

Costs Related to Organizational Design Update

During the third quarter of 2020, we realigned certain parts of our organizational structure by shifting resources to accelerate growth, fund priority investments, and simplify and improve our business practices. In connection with this update, we incurred charges of $23.3 million before tax, or $18.6 million after tax, which primarily consisted of employee severance and benefit costs as well as costs related to lease terminations and the disposal of certain fixed assets. This update did not result in the exit or disposal of any of our lines of business.

Closed Block Individual Disability Reinsurance Transaction

In December 2020, we completed the first phase of a reinsurance transaction, pursuant to which Provident Life and Accident Insurance Company, The Paul Revere Life Insurance Company, and Unum Life Insurance Company of America, wholly-owned domestic insurance subsidiaries of Unum Group, and collectively referred to as "the ceding companies", each entered into separate reinsurance agreements with Commonwealth, to reinsure on a coinsurance basis effective as of July 1, 2020, approximately 75 percent of the Closed Block individual disability business, primarily direct business written by the ceding companies. In March 2021, we completed the second phase of the reinsurance transaction, pursuant to which the ceding companies and Commonwealth amended and restated their respective reinsurance agreements to reinsure on a coinsurance and modified coinsurance basis effective as of January 1, 2021, a substantial portion of the remaining Closed Block individual disability business that was not ceded in December 2020, primarily business previously assumed by the ceding companies. Commonwealth established and will maintain collateralized trust accounts for the benefit of the ceding companies to secure its obligations under the reinsurance agreements.

In December 2020, Provident Life and Casualty Insurance Company (PLC), also a wholly-owned domestic insurance subsidiary of Unum Group, entered into an agreement with Commonwealth whereby PLC will provide a 12-year volatility cover to Commonwealth for the active life cohort (ALR cohort). As part of this agreement, PLC received a payment from Commonwealth of $62.1 million. On March 31, 2021, PLC and Commonwealth amended and restated this agreement to incorporate the ALR cohort related to the additional business that was reinsured between the ceding companies and Commonwealth as part of the second phase of the transaction. As part of the amended and restated volatility cover, PLC received a payment from Commonwealth of $17.9 million. At the end of the 12-year coverage period, Commonwealth will retain the remaining incidence and claims risk on the ALR cohort of the ceded business.

In connection with the first phase of the reinsurance transaction which occurred in December 2020, the ceding companies paid a total ceding commission to Commonwealth of $437.7 million. In connection with the second phase of the reinsurance transaction which occurred in March 2021, Commonwealth paid a ceding commission to the ceding companies of $18.2 million. The ceding companies transferred assets, which consisted primarily of cash and fixed maturity securities, of $6,669.8 million and $767.0 million, for the first phase in December 2020 and the second phase in March 2021, respectively. In addition, we

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recognized the following items for the first phase in December 2020 and the second phase in March 2021, respectively:

•Net realized investment gains totaling $1,302.3 million and $67.6 million before tax, or $1,028.8 million and $53.4 million after tax, related to the transfer of investments.

•Increase in benefits and change in reserves for future benefits of $1,284.5 million and $133.1 million, or $1,014.7 million and $105.1 million after tax, resulting from the realization of previously unrealized investment gains and losses recorded in accumulated other comprehensive income (loss).

•Transaction costs totaling $21.0 million and $6.2 million, or $16.6 million and $5.0 million after tax.

•Reinsurance recoverable of $6,141.5 million and $990.0 million related to the policies on claim status (DLR cohort).

•Cost of reinsurance, or prepaid reinsurance premium, of $815.7 million and $43.1 million related to the DLR cohort for which we amortized $63.8 million before tax or $50.4 million after tax in 2022, $79.1 million before tax or $62.3 million after tax in 2021, and $2.6 million before tax or $2.0 million after tax in 2020.

•Deposit asset of $88.2 million and $5.0 million related to the ALR cohort.

•Tax benefit of $36.5 million, in connection with the first phase.

•Payable of $307.2 million related to the portfolio of invested assets associated with the business ceded on a modified coinsurance basis, in connection with the second phase.

We released approximately $200 million of capital during the first quarter of 2021 in addition to the $400 million that was released in December 2020. See "Reinsurance" contained herein in Item 1; "Segment Results," and "Liquidity and Capital Resources - Cash Available from Subsidiaries" contained herein in Item 7, and Notes 12 and 16 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion on the impacts related to this reinsurance transaction.

Consolidated Company Outlook for 2023

We believe our strategy of providing financial protection products at the workplace puts us in a position of strength. We continue to fulfill our corporate purpose of helping the working world thrive throughout life’s moments by providing excellent service to people at their time of need. Our strategy remains centered on growing our core businesses, through investing and transforming our operations and technology to anticipate and respond to the changing needs of our customers, expanding into new adjacent markets through meaningful partnerships and effective deployment of our capital across our portfolio.

As the pandemic impacts have lessened, we have experienced recovery in our earnings driven by the underlying strength of our business and expect positive operating trends in our core businesses to continue in 2023, including improved claim experience. The products and services we provide delivered significant value to employers, employees and their families, throughout the COVID-19 pandemic and we believe this will help drive sales and premium growth in 2023.

The current interest rate environment could continue to positively impact our yields on new investments, but could also continue to create unrealized losses in our current holdings. We also may continue to experience further volatility in miscellaneous investment income primarily related to changes in partnership net asset values as well as bond calls.

As part of our discipline in pricing and reserving, we continuously monitor emerging claim trends and interest rates. We will continue to take appropriate pricing actions on new business and renewals that are reflective of the current environment and may continue to utilize derivative financial instruments to manage interest rate risk.

Our business is well-diversified by geography within our markets, industry exposures and case size, and we continue to analyze and employ strategies that we believe will help us navigate the current environment. These strategies allow us to maintain financial flexibility to support the needs of our businesses, while also returning capital to our shareholders. We have strong core businesses that have a track record of generating significant free cash flow, and we will continue to invest in our operations and expand into adjacent markets where we can best leverage our expertise and capabilities to capture market growth opportunities as those opportunities emerge. We believe that consistent operating results, combined with the implementation of strategic initiatives and the effective deployment of capital, will allow us to meet our financial objectives.

Effective January 1, 2023, we will adopt Accounting Standard Update 2018-12, Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12).

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Further discussion is included in "Reconciliation of Non-GAAP and Other Financial Measures," "Accounting Developments", "Consolidated Operating Results," "Segment Results," "Investments," and "Liquidity and Capital Resources" contained herein in this Item 7 and in the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Reconciliation of Non-GAAP and Other Financial Measures

We analyze our performance using non-GAAP financial measures. A non-GAAP financial measure is a numerical measure of a company's performance, financial position, or cash flows that excludes or includes amounts that are not normally excluded or included in the most directly comparable measure calculated and presented in accordance with U.S generally accepted accounting principles (GAAP). The non-GAAP financial measure of "after-tax adjusted operating income" differs from net income as presented in our consolidated operating results and income statements prepared in accordance with GAAP due to the exclusion of investment gains or losses and the amortization of the cost of reinsurance as well as certain other items as specified in the reconciliations below. Investment gains or losses primarily include realized investment gains or losses, expected investment credit losses, and gains or losses on derivatives. We believe after-tax adjusted operating income is a better performance measure and better indicator of the profitability and underlying trends in our business.

Investment gains or losses depend on market conditions and do not necessarily relate to decisions regarding the underlying business of our segments. Our investment focus is on investment income to support our insurance liabilities as opposed to the generation of investment gains or losses. Although we may experience investment gains or losses which will affect future earnings levels, a long-term focus is necessary to maintain profitability over the life of the business since our underlying business is long-term in nature, and we need to earn the interest rates assumed in calculating our liabilities.

As previously discussed, we have exited a substantial portion of our Closed Block individual disability product line through the two phases of the reinsurance transaction that were executed in December 2020 and March 2021. As a result, we exclude the amortization of the cost of reinsurance that was recognized upon the exit of the business related to the DLR cohort of policies. We believe that the exclusion of the amortization of the cost of reinsurance provides a better view of our results from our ongoing businesses.

We may at other times exclude certain other items from our discussion of financial ratios and metrics in order to enhance the understanding and comparability of our operational performance and the underlying fundamentals, but this exclusion is not an indication that similar items may not recur and does not replace net income or net loss as a measure of our overall profitability.

See "Executive Summary" contained herein in Item 7 and Notes 3, 6, 7, 8, 12, 13, and 15 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion regarding the items specified in the reconciliations below.

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A reconciliation of GAAP financial measures to our non-GAAP financial measures is as follows:

	Year Ended December 31
	2022				2021				2020
	(in millions)		per share *		(in millions)		per share *		(in millions)		per share *
Net Income	$	1,314.2	$	6.50	$	824.2	$	4.02	$	793.0	$	3.89
Excluding:
Net Investment Gains and Losses
Net Realized Investment Gain Related to Reinsurance Transaction (net of tax expense of $—; $14.2; $273.5)	—		—		53.4		0.26		1,028.8		5.05
Net Investment Gain (Loss), Other (net of tax expense (benefit) of $(3.5); $1.9; $(20.9))	(12.2)		(0.07)		7.2		0.03		(82.3)		(0.40)
Total Net Investment Gain (Loss)	(12.2)		(0.07)		60.6		0.29		946.5		4.65
Items Related to Closed Block Individual Disability Reinsurance Transaction
Change in Benefit Reserves and Transaction Costs (net of tax benefit of $—; $29.2; $274.2)	—		—		(110.1)		(0.53)		(1,031.3)		(5.06)
Amortization of the Cost of Reinsurance (net of tax benefit of $13.4; $16.8; $0.6)	(50.4)		(0.25)		(62.3)		(0.31)		(2.0)		(0.01)
Net Tax Benefits of Reinsurance Transaction	—		—		—		—		36.5		0.18
Total Items Related to Closed Block Individual Disability Reinsurance Transaction	(50.4)		(0.25)		(172.4)		(0.84)		(996.8)		(4.89)
Net Reserve Change Related to Reserve Assumption Updates (net of tax expense (benefit) of $32.5; $38.1; $(35.5))	122.5		0.61		143.3		0.70		(133.5)		(0.66)
Impairment Loss on Internal-Use Software (net of tax benefit of $—; $2.5; $—)	—		—		(9.6)		(0.05)		—		—
Cost Related to Early Retirement of Debt (net of tax benefit of $—; $14.1; $—)	—		—		(53.2)		(0.26)		—		—
Impairment Loss on ROU Asset (net of tax benefit of $—; $2.9; $2.7)	—		—		(11.0)		(0.05)		(10.0)		(0.05)
Impact of U.K. Tax Rate Increase	—		—		(24.2)		(0.12)		—		—
Costs Related to Organizational Design Update (net of tax benefit of $—; $—; $4.7)	—		—		—		—		(18.6)		(0.09)
After-tax Adjusted Operating Income	$	1,254.3	$	6.21	$	890.7	$	4.35	$	1,005.4	$	4.93
* Assuming Dilution

We measure and analyze our segment performance on the basis of "adjusted operating revenue" and "adjusted operating income" or "adjusted operating loss", which differ from total revenue and income before income tax as presented in our consolidated statements of income due to the exclusion of investment gains and losses and the amortization of the cost of reinsurance as well as other items as specified in the reconciliations below. These performance measures are in accordance with GAAP guidance for segment reporting, but they should not be viewed as a substitute for total revenue, income before income tax, or net income. 

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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
	2022		2021		2020
	(in millions of dollars)
Total Revenue	$	11,991.0	$	12,013.8	$	13,162.1
Excluding:
Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Adjusted Operating Revenue	$	12,006.7	$	11,937.1	$	11,963.0
Income Before Income Tax	$	1,631.4	$	1,063.0	$	964.0
Excluding:
Net Investment Gains and Losses
Net Realized Investment Gain Related to Reinsurance Transaction	—		67.6		1,302.3
Net Investment Gain (Loss), Other	(15.7)		9.1		(103.2)
Total Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Items Related to Closed Block Individual Disability Reinsurance Transaction
Change in Benefit Reserves and Transaction Costs	—		(139.3)		(1,305.5)
Amortization of the Cost of Reinsurance	(63.8)		(79.1)		(2.6)
Total Items Related to Closed Block Individual Disability Reinsurance Transaction	(63.8)		(218.4)		(1,308.1)
Net Reserve Change Related to Reserve Assumption Updates	155.0		181.4		(169.0)
Impairment Loss on Internal-Use Software	—		(12.1)		—
Cost Related to Early Retirement of Debt	—		(67.3)		—
Impairment Loss on ROU Asset	—		(13.9)		(12.7)
Costs Related to Organizational Design Update	—		—		(23.3)
Adjusted Operating Income	$	1,555.9	$	1,116.6	$	1,278.0

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Critical Accounting Estimates

We prepare our financial statements in accordance with GAAP. The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in our financial statements and accompanying notes. Estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed in our financial statements. The accounting estimates deemed to be most critical to our financial position and results of operations are those related to reserves for policy and contract benefits, deferred acquisition costs, valuation of investments, pension and postretirement benefit plans, income taxes, and contingent liabilities. For additional information, refer to our significant accounting policies in Note 1 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Reserves for Policy and Contract Benefits

Reserves for policy and contract benefits are our largest liabilities and represent claims that we estimate we will eventually pay to our policyholders. The two primary categories of reserves are policy reserves for claims not yet incurred and claim reserves for claims that have been incurred or are estimated to have been incurred but not yet reported to us. Reserves for policy and contract benefits equaled $44.7 billion and $45.3 billion at December 31, 2022 and 2021, or approximately 85.6 percent and 77.1 percent of our total liabilities, respectively. Reserves ceded to reinsurers were $13.0 billion and $13.5 billion at December 31, 2022 and 2021 and are reported as a reinsurance recoverable in our consolidated balance sheets.

Policy Reserves

Policy reserves are established in the same period we issue a policy and equal the difference between projected future policy benefits and future premiums, allowing a margin for expenses and profit. These reserves relate primarily to our non-interest sensitive products, including our individual disability and voluntary benefits products in our Unum US segment; individual disability and life products in our Unum International segment; voluntary benefits products in our Colonial Life segment; and long-term care and other products, which includes individual disability, in our Closed Block segment. The reserves are calculated based on assumptions that were appropriate at the date the policy was issued and are not subsequently modified unless the policy reserves become inadequate (i.e. loss recognition occurs).

•Persistency assumptions are based on our actual historical experience adjusted for future expectations.

•Claim incidence and claim resolution rate assumptions related to mortality and morbidity are based on actual experience or industry standards adjusted as appropriate to reflect our actual experience and future expectations.

•Discount rate assumptions are based on our current and expected net investment returns.

In establishing policy reserves, we use assumptions that reflect our best estimate while considering the potential for adverse variances in actual future experience, which results in a total policy reserve balance that has an embedded reserve for adverse deviation. We do not, however, establish an explicit and separate reserve as a provision for adverse deviation from our assumptions.

We perform loss recognition tests on our policy reserves annually, or more frequently if appropriate, using best estimate assumptions as of the date of the test, without a provision for adverse deviation. We group the policy reserves for each major product line within a segment when we perform the loss recognition tests. If the policy reserves determined using these best estimate assumptions are higher than our existing policy reserves net of any deferred acquisition cost balance, the existing policy reserves are increased or deferred acquisition costs are reduced to immediately recognize the deficiency. Thereafter, the policy reserves for the product line are calculated using the same method we used for the loss recognition testing, referred to as the gross premium valuation method, wherein we use our best estimate as of the gross premium valuation (loss recognition) date rather than the initial policy issue date to determine the expected future claims, commissions, and expenses we will pay and the expected future gross premiums we will receive.

Because the key policy reserve assumptions for policy persistency, mortality and morbidity, and discount rates are all locked in at policy issuance based on assumptions appropriate at that time, policy reserve assumptions are generally not changed due to a change in claim status from active to disabled subsequent to policy issuance.  Depending on the funding mechanism, a full policy reserve is held during disability reflecting continued funding of the full policy reserve during a disability claim, or a fractional policy reserve is held reflecting that the individual policyholder would need to recover before generating future claims for a separate occurrence. The policy reserves build up and release over time based on assumptions made at the time of policy issuance such that the reserve is eliminated as policyholders either reach the terminal age for coverage, die, or voluntarily lapse the policy. Policy reserves for Unum US, Unum International, and Colonial Life products are determined using the net level

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premium method as prescribed by GAAP. In applying this method, we use, as applicable by product type, morbidity and mortality incidence rate assumptions, claim resolution rate assumptions, and policy persistency assumptions, among others, to determine our expected future claim payments and expected future premium income. We then apply an interest, or discount, rate to determine the present value of the expected future claims and claim expenses we will pay and the expected future premiums we will receive, with a provision for profit allowed.

Policy reserves for our Closed Block segment include certain older policy forms for individual and group long-term care and certain other products, all of which are no longer actively marketed. The reserves for individual and group long-term care are determined using the gross premium valuation method. Key assumptions are persistency, mortality and morbidity, claim incidence, claim resolution rates, commission rates, and maintenance expense rates. For long-term care, premium rate increases are also a key assumption. We apply an interest, or discount, rate to determine the present value of the expected future claims, commissions, and expenses we will pay as well as the expected future premiums we will receive, with no provision for future profit. The interest rate is based on our expected net investment returns on the investment portfolio supporting the reserves for these blocks of business. Under the gross premium valuation method, we do not include an embedded provision for the risk of adverse deviation from these assumptions. Gross premium valuation assumptions do not change after the date of loss recognition unless reserves are again determined to be deficient in the future.

Policy reserves for certain other products, excluding individual and group long-term care, which are no longer actively marketed and are reported in our Closed Block segment represent $5.6 billion on a gross basis. We have ceded $4.7 billion of reserves related to these other products to reinsurers. The ceded reserve balance is reported in our consolidated balance sheets as a reinsurance recoverable. We continue to service a block of group pension products, which we have not ceded, and the policy reserves for these products are based on expected mortality rates and retirement rates. Expected future payments are discounted at interest rates reflecting the anticipated investment returns for the assets supporting the liabilities.

Claim Reserves

Claim reserves are established when a claim is incurred or is estimated to have been incurred but not yet reported (IBNR) to us and, as prescribed by GAAP, equals our long-term best estimate of the present value of the liability for future claim payments and claim adjustment expenses. A claim reserve is based on actual known facts regarding the claim, such as the benefits available under the applicable policy, the covered benefit period, the age, and, as appropriate, the occupation and cause of disability of the claimant, as well as assumptions derived from our actual historical experience and expected future changes in experience for factors such as the claim duration, discount rate, and policy benefit offsets, including those for social security and other government-based welfare benefits. Reserves for IBNR claims, similar to incurred claim reserves, include our assumptions for claim duration and discount rates, but because we do not yet know the facts regarding the specific claims, these reserves are also established based on historical incidence rate assumptions, including claim reporting patterns, the average cost of claims, and the expected volumes of incurred claims. Our incurred claim reserves and IBNR claim reserves do not include any provision for the risk of adverse deviation from our assumptions.

Claim reserves, unlike policy reserves, are subject to revision as current claim experience and projections of future factors affecting claim experience change. Each quarter we review our emerging experience to ensure that our claim reserves are appropriate. If we believe, based on our actual experience and our view of future events, that our long-term assumptions need to be modified, we adjust our reserves accordingly with a charge or credit to our current period income.

Multiple estimation methods exist to establish claim reserve liabilities, with each method having its own advantages and disadvantages. Available reserving methods utilized to calculate claim reserves include the tabular reserve method, the paid loss development method, the incurred loss development method, the count and severity method, and the expected claim cost method. No single method is better than the others in all situations and for all product lines. The estimation methods we have chosen are those that we believe produce the most reliable reserves.

We use a tabular reserve methodology on reported claims for our Unum US group long-term disability and individual disability claims as well as claims for our Closed Block group and individual long-term care and certain other products. The majority of our claim reserves for our Closed Block other products have been ceded as a result of the Closed Block individual disability reinsurance transaction. Under the tabular reserve methodology, reserves for reported claims are based on certain characteristics of the actual reported claimants, such as age, length of time disabled, and medical diagnosis, as well as assumptions regarding claim duration, discount rate, and policy benefit offsets. We believe the tabular reserve method is the most accurate to calculate long-term liabilities and allows us to use the most available known facts about each claim. IBNR claim reserves for our long-term products are calculated using the count and severity method using historical patterns of the claims to be reported and the associated claim costs. For Unum US group short-term disability products, an estimate of the value of future payments to be

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made on claims already submitted, as well as on IBNR claims, is determined in aggregate using a paid loss development method rather than on the individual claimant basis that we use for reported claims on long-term products. The average length of time between the event triggering a claim under a policy and the final resolution of those claims is much shorter for these products than for our long-term liabilities and results in less estimation variability.

Claim reserves for Unum US group life and accidental death and dismemberment products are related primarily to death claims reported but not yet paid, IBNR death claims, and a liability for waiver of premium benefits. The death claim reserve is based on the actual face amount to be paid, the IBNR reserve is calculated using the paid loss development method, and the waiver of premium benefits reserve is calculated using the tabular reserve methodology.

Claim reserves supporting the group and individual dental and vision products reported in our Unum US and Colonial Life segments have a short claim payout period. As a result, the reserves, which primarily represent IBNR and a small amount of claims pending payment, are calculated using the paid loss development method.

Claim reserves supporting our Unum International segment are calculated using generally the same methodology that we use for Unum US disability and group term life reserves. Claim reserves for our Unum UK group dependent life product are calculated using discounted cash flows, based on our assumptions for claim duration and discount rates. The assumptions used in calculating claim reserves for this segment are based on standard country-specific industry experience, adjusted for our own experience.

The majority of the Colonial Life segment and the Unum US voluntary line of business have short-term benefits, which generally have less estimation variability than our long-term products because of the shorter claim payout period. Claim reserving methods may vary by product depending on the nature of the liability. Our claim reserves for the Colonial Life segment and the Unum US voluntary line of business are predominantly determined using the incurred loss development method based on our own experience. The incurred loss development method uses the historical patterns of payments by loss date to predict future claim payments for each loss date. Where the incurred loss development method may not be appropriate, we estimate the incurred claims using an expected claim cost per policy or other measure of exposure. The key assumptions for claim reserves for the Colonial Life segment and the Unum US voluntary line of business are the timing, rate, and amount of estimated future claim payments; and the estimated expenses associated with the payment of claims.

The following table displays policy reserves, incurred claim reserves, and IBNR claim reserves by major product line, with the summation of the policy reserves and claim reserves shown both gross and net of the associated reinsurance recoverable. Incurred claim reserves represent the expected benefits payable under each incurred claim, along with other expenses associated with the payment of the claims. IBNR claim reserves include provisions for incurred but not reported claims and a provision for reopened claims for our disability products. The IBNR and reopened claim reserves for our disability products are developed and maintained in aggregate based on historical monitoring. Impacting year over year comparability of policy and claim reserves in the following chart are the 2022 reserve assumption updates for our Unum US group disability, Unum US group life, and Closed Block individual disability product lines. Also impacting year over year comparability are the 2021 reserve assumption updates for our Unum US group disability, Closed Block long-term care, and Closed Block individual disability product lines as well as the second phase of the Closed Block individual disability reinsurance transaction that we entered into in March 2021. See "Executive Summary" contained herein in this Item 7 and Notes 6 and 12 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

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(in millions of dollars)	December 31, 2022
	Gross												Total Reinsurance Ceded
	Policy Reserves				Claim Reserves										Total Net
			%		Incurred		IBNR		%		Total
Group Disability	$	—	—	%	$	5,003.0	$	747.6	25.2	%	$	5,750.6	$	46.4	$	5,704.2
Group Life and Accidental Death & Dismemberment	54.5		0.2		678.1		260.0		4.1		992.6		7.5		985.1
Voluntary Benefits	1,791.0		8.2		44.8		50.3		0.4		1,886.1		13.2		1,872.9
Individual Disability	435.0		2.0		1,427.8		154.1		6.9		2,016.9		208.8		1,808.1
Dental and Vision	—		—		0.2		10.7		0.1		10.9		0.1		10.8
Unum US Segment	2,280.5		10.4		7,153.9		1,222.7		36.7		10,657.1		276.0		10,381.1
Unum International Segment	206.1		0.9		1,925.4		164.8		9.2		2,296.3		74.2		2,222.1
Colonial Life Segment	2,575.9		11.8		276.5		106.5		1.7		2,958.9		1.3		2,957.6
Long-term Care	11,220.7		51.2		2,477.5		283.0		12.1		13,981.2		5.7		13,975.5
All Other	5,620.7		25.7		9,021.5		201.0		40.3		14,843.2		12,602.8		2,240.4
Closed Block Segment	16,841.4		76.9		11,499.0		484.0		52.4		28,824.4		12,608.5		16,215.9
Subtotal	$	21,903.9	100.0	%	$	20,854.8	$	1,978.0	100.0	%	44,736.7		12,960.0		31,776.7
Adjustment Related to Unrealized Investment Gains and Losses											(566.7)		(18.1)		(548.6)
Consolidated											$	44,170.0	$	12,941.9	$	31,228.1

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	December 31, 2021
	Gross												Total Reinsurance Ceded
	Policy Reserves				Claim Reserves										Total Net
			%		Incurred		IBNR		%		Total
Group Disability	$	—	—	%	$	5,350.2	$	766.6	25.9	%	$	6,116.8	$	52.3	$	6,064.5
Group Life and Accidental Death & Dismemberment	56.7		0.3		715.8		281.0		4.2		1,053.5		4.4		1,049.1
Voluntary Benefits	1,752.2		8.1		47.6		51.3		0.4		1,851.1		23.7		1,827.4
Individual Disability	456.1		2.1		1,412.0		150.4		6.6		2,018.5		205.7		1,812.8
Dental and Vision	—		—		0.9		11.5		0.1		12.4		0.1		12.3
Unum US Segment	2,265.0		10.5		7,526.5		1,260.8		37.2		11,052.3		286.2		10,766.1
Unum International Segment	211.2		1.0		2,110.7		156.0		9.6		2,477.9		94.3		2,383.6
Colonial Life Segment	2,471.8		11.4		322.8		115.5		1.9		2,910.1		3.2		2,906.9
Long-term Care	10,842.2		50.2		2,300.1		271.7		10.9		13,414.0		7.4		13,406.6
All Other	5,800.8		26.9		9,363.2		237.4		40.4		15,401.4		13,095.5		2,305.9
Closed Block Segment	16,643.0		77.1		11,663.3		509.1		51.3		28,815.4		13,102.9		15,712.5
Subtotal	$	21,591.0	100.0	%	$	21,623.3	$	2,041.4	100.0	%	45,255.7		13,486.6		31,769.1
Adjustment Related to Unrealized Investment Gains and Losses											4,659.5		132.1		4,527.4
Consolidated											$	49,915.2	$	13,618.7	$	36,296.5

Key Assumptions

The calculation of policy and claim reserves involves numerous assumptions, but the primary assumptions used to calculate reserves are (1) the discount rate, (2) the claim resolution rate, and (3) the claim incidence rate for policy reserves and IBNR claim reserves. Of these assumptions, our discount rate and claim resolution rate assumptions have historically had the most significant effects on our level of reserves because many of our product lines provide benefit payments over an extended period of time.

1.The discount rate, which is used in calculating both policy reserves and incurred and IBNR claim reserves, is the interest rate that we use to discount future claim payments to determine the present value. A higher discount rate produces a lower reserve. If the discount rate is higher than our future investment returns, our invested assets will not earn enough investment income to support our future claim payments. In this case, the reserves may eventually be insufficient. We set our assumptions based on our current and expected future investment yield of the assets supporting the reserves, considering current and expected future market conditions. If the investment yield on new investments that are purchased differs from the investment yield of the existing investment portfolio, the discount rate assumption on claims may be adjusted to reflect the impact of the new investment yield.

2.The claim resolution rate, used for both policy reserves and incurred and IBNR claim reserves, is the probability that a disability or long-term care claim will close due to recovery or death of the insured. It is important because it is used to estimate how long benefits will be paid for a claim. Estimated resolution rates that are set too high will result in reserves that are lower than they need to be to pay the claim benefits over time. Claim resolution assumptions involve many factors, including the cause of disability, the policyholder's age, the type of contractual benefits provided, and the time since initial disability. We primarily use our own claim experience to develop our claim resolution assumptions. These assumptions are established for the

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probability of death and the probability of recovery from disability. Our studies review actual claim resolution experience over a number of years, with more weight placed on our experience in the more recent years. We also consider any expected future changes in claim resolution experience.

3.The incidence rate, used for policy reserves and IBNR claim reserves, is the rate at which new claims are submitted to us. The incidence rate is affected by many factors, including the age of the insured, the insured's occupation or industry, the benefit plan design, and certain external factors such as consumer confidence and levels of unemployment. We establish our incidence assumption using a historical review of actual incidence results along with an outlook of future incidence expectations.

Establishing reserve assumptions is complex and involves many factors. Reserves, particularly for policies offering insurance coverage for long-term disabilities and long-term care, are dependent on numerous assumptions other than just those presented in the preceding discussion. The impact of internal and external events, such as changes in claims operational procedures, economic trends such as the rate of unemployment, the level of consumer confidence, the emergence of new diseases, new trends and developments in medical treatments, and legal trends and legislative changes, including changes to social security and other government-based welfare benefits programs which provide policy benefit offsets, among other factors, may influence claim incidence rates, claim resolution rates, and claim costs. In addition, for policies offering coverage for disability or long-term care at advanced ages, the level and pattern of mortality rates at advanced ages will impact overall benefit costs. Reserve assumptions differ by product line and by policy type within a product line. Additionally, in any period and over time, our actual experience may have a positive or negative variance from our long-term assumptions, either singularly or collectively, and these variances may offset each other. We test the overall adequacy of our reserves using all assumptions and with a long-term view of our expected experience over the life of a block of business rather than test just one or a few assumptions independently that may be aberrant over a short period of time. Therefore, while it is possible to evaluate the sensitivity of overall adequacy results in our reserves based upon a change in each individual assumption, the actual impacts of changes to a variety of underlying assumptions must be considered in the aggregate by product line in order to judge the overall potential implications to reserve adequacy. The following section presents an overview of our trend analysis for key assumptions and the results of variability in our assumptions, in aggregate, for the reserves which we believe are reasonably possible to have a material impact on our future financial results if actual claims yield a materially different amount than what we currently expect and have reserved for, either favorable or unfavorable. As a result of the Closed Block individual disability reinsurance transaction discussed in the "Executive Summary" contained herein Item 7, we no longer incorporate this block of business into our discussion of trends in key assumptions below.

Trends in Key Assumptions

Our view on long-term mortality and morbidity expectations has not been impacted by the COVID-19 pandemic, given the limited experience relative to the long-term nature of our products, the extraordinary nature of the event, and the fast pace of medical advancements to fight the disease. We have experienced elevated mortality across our life product lines largely resulting from the COVID-19 pandemic, and at this time we anticipate the mortality impacts of the pandemic may persist in the short-term, albeit at a lower level than our experience in 2020, 2021, and the first quarter of 2022.

We have also experienced elevated disability claims incidence rates largely resulting from the COVID-19 pandemic including, in our belief, the related impact on the social and economic environment. We have, at times, experienced an increase in our group long-term disability morbidity claim incidence trends during and following a recessionary period and believe claim incidence trends may continue to follow general economic conditions and shifts in the demographics of the general workforce.  

Generally, we do not expect our persistency trends to change significantly in the short-term, and to the extent that these trends do change, we expect those changes to be gradual over a longer period of time.

Although interest rates increased in 2022, long-term interest rates supporting the majority of our lines of business remain below historical norms. The assumptions we used to discount reserves during this period were slightly lower than historical levels for certain of our product lines. Reserve discount rate assumptions for new policies and new claims are periodically adjusted to reflect our current and expected net investment returns. Changes in our average discount rate assumptions tend to occur gradually over a longer period of time because of the long-duration investment portfolios which support the reserves for the majority of our lines of business.

Our claim resolution rate assumption used in determining reserves is our expectation of the resolution rate we will experience over the life of the block of business and will vary from actual experience in any one period, both favorably and unfavorably. Claim resolution rates are very sensitive to operational and environmental changes and have a greater chance of significant

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variability in a shorter period of time than our other reserve assumptions. These rates are reviewed on a quarterly basis for the death and recovery components separately. While claim resolution rates in our Unum US group long-term disability product line have shown some variability over the last several years, they have exhibited an increasing trend.

We monitor and test our reserves for adequacy relative to all of our assumptions in the aggregate. In our estimation, scenarios based on reasonably possible variations in each of our reserve assumptions for our Unum US group long-term disability product could produce a change of $100 million which represents 1.8 percent of our reserve balance. Of the assumptions impacting the estimated change in reserves, the largest contributor is the claim resolution rate for which we assumed a change of approximately 10 percent.

During the third quarter of 2022, we completed a review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during the third quarter of 2022, we updated our reserve assumptions to reflect our current estimate of future benefit obligations and determined that our claims reserves in our US group long-term disability product line and our waiver of premium reserves for our Unum US group life product line should be reduced by $121.0 million and $34.0 million before tax, respectively, due primarily to sustained improvement in claim recovery trends since our last assumption update, partially offset by lower social security benefit offsets for our group long-term disability product line.

In addition to our Unum US group long-term disability line of business, we consider variability in our reserve assumptions related to long-term care policy reserves.  These reserves are held under the gross premium valuation method and do not change after the date of loss recognition unless reserves are again determined to be deficient. As such, positive developments will result in the accumulation of reserve margin, while adverse developments would result in an additional reserve charge.  Policy reserves for long-term care are based upon a number of key assumptions, and each assumption has various factors which may impact the long-term outcome. Key assumptions with respect to morbidity, mortality, claims incidence and resolutions, persistency, interest rates, and future premium rate increases must incorporate extended views of expectations for many years into the future. Reserves are highly sensitive to these estimates.

Our long-term care discount rate assumption reflects our expectation that the low interest rate environment will continue to persist and our expected impact on future long-term care new money yield rates. Our expectation for long-term care new money yield rates assumes a 10-year treasury rate grading over a 7 year period, ending in 2027, to a rate of 3.25 percent, when we assume no further increase. Partially offsetting the impact from the discount rate assumption was a favorable update to our assumptions for premium rate increases based on approvals and inventory updates since the third quarter of 2018. The remaining key assumptions for our long-term care policy reserves remain materially unchanged from the third quarter of 2018.

Sensitivity analysis related to our key assumptions for long-term care reserves along with the potential impact to our reserve balance is as follows. This sensitivity analysis was completed as of the date of our assumption update in the fourth quarter of 2020.

Long-Term Care Assumption	Sensitivity		Unfavorable		Favorable
			(in millions of dollars)
Active Policy Terminations	7.00	%	$	420	$	395
Claim Incidence	3.50	%	$	435	$	445
Claim Terminations	2.00	%	$	260	$	255
Morbidity/Mortality Improvement*	No Improvement/2.00%		$	1,000	$	650
Future Unapproved Rate Increases	10.00	%	$	80	$	80
New Money Rate	0.25	%	$	275	$	275
Discount Rate	0.25	%	$	500	$	500
* Morbidity improvement has been observed in our claims experience over a ten year period, normalized for variables such as age and claims type.

Key assumptions and related impacts are also heavily interrelated in both their outcome and in their effects on reserves. For example, changes in the view of morbidity and mortality might be mitigated by either potential future premium rate increases and/or morbidity improvements due to general improvement in health and/or medical breakthroughs. There is potentially a wide range of outcomes for each assumption and in totality.

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We believe that these ranges provide a reasonable estimate of the possible changes in reserve balances for those product lines where we believe it is possible that variability in the assumptions, in the aggregate, could result in a material impact on our reserve levels, but we record our reserves based on our long-term best estimate. Because these product lines have long-term claim payout periods, there is a greater potential for significant variability in claim costs, either positive or negative. We closely monitor emerging experience and use these results to inform our view of long-term assumptions.

Effective January 1, 2023 we will adopt ASU 2018-12, which will significantly change how we value our reserves. We are continuing our implementation efforts and are evaluating the effects of complying with this update. See "Accounting Developments" contained herein in this Item 7 and Note 1 of the "Notes to the Consolidated Financial Statements" contained herein in Item 8 for further discussion on the impacts upon adoption.

Deferred Acquisition Costs (DAC)

We defer incremental direct costs associated with the successful acquisition of new or renewal insurance contracts and amortize these costs over the life of the related policies. Deferred costs include certain commissions, other agency compensation, selection and policy issue expenses, and field expenses. Acquisition costs that do not vary with the production of new business, such as commissions on group products which are generally level throughout the life of the policy, are excluded from deferral.

Approximately 90.7 percent of our DAC relates to non-interest sensitive products, and we amortize DAC for these products in proportion to the premium income we expect to receive over the life of the policies. DAC related to interest sensitive policies is amortized over the lives of the policies in relation to the present value of estimated gross profits from surrender charges, mortality margins, investment returns, and expense margins. Key assumptions used in developing the future amortization of DAC are persistency, premium income, and for our interest sensitive products, mortality margins and investment returns.  We use our own historical experience and expectation of the future performance of our businesses in determining our assumptions.  For non-interest sensitive products, the estimated premium income in the early years of the amortization period is generally higher than in the later years due to the anticipated cumulative effect of policy persistency in the early years, which results in a greater proportion of the costs being amortized in the early years of the life of the policy.  Our key assumptions used to develop the future amortization of acquisition costs deferred during 2022 did not change materially from those used in 2021.  Generally, we do not expect our key assumptions to change significantly in the short-term, and to the extent that these trends do change, we expect those changes to be gradual over a longer period of time.

Loss recognition and recoverability testing is performed on an annual basis, or more frequently if appropriate, using best estimate assumptions as to future experience as of the date of the test. Insurance contracts are grouped for each major product line within a segment when we perform the loss recognition and recoverability tests. Key assumptions used in this testing include the discount rate, persistency, and the claim assumptions. See "Reserves for Policy and Contract Benefits" herein in this Item 7 for further discussion regarding loss recognition testing and the related key assumptions.

If loss recognition or recoverability testing indicates that deferred acquisition costs are not recoverable, the deficiency is charged to expense. Using our best estimate assumptions, during the fourth quarter of 2021, we determined that $15.1 million of acquisition costs related to the Unum US group life and accidental death and dismemberment product line were not recoverable driven by losses resulting from COVID-19 life claims, and, as a result these amounts were not deferred.

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The following are our current assumptions regarding our DAC balances:

		Balance Remaining as a %			DAC Balances
	Amortization	of Year-end DAC Balance			at December 31
	Period	Year 3	Year 10	Year 15	2022		2021
					(in millions of dollars)
Unum US
Group Disability	4-6	26%	0%	0%	$	94.9	$	93.7
Group Life and Accidental Death & Dismemberment	4-6	26%	0%	0%	63.2		59.1
Supplemental and Voluntary:
Individual Disability	20	74%	26%	5%	437.8		426.5
Voluntary Benefits	10-23	59%	17%	5%	475.5		501.0
Dental and Vision	4	26%	0%	0%	18.0		15.9
Unum International
Unum UK
Group Long-term Disability	3	0%	0%	0%	2.6		2.6
Group Life	3	0%	0%	0%	1.8		1.6
Supplemental	20	53%	10%	1%	10.0		13.1
Unum Poland	30	78%	54%	42%	22.2		18.1
Colonial Life
Accident, Sickness, and Disability	15	73%	11%	0%	540.8		557.4
Life	25	75%	24%	6%	362.0		292.4
Cancer and Critical Illness	19	77%	23%	4%	223.5		226.5
Totals					$	2,252.3	$	2,207.9

Amortization of DAC is adjusted to reflect actual experience for assumptions which deviate compared to the anticipated experience. Any deviations from projections may result in a change to the rate of amortization in the period such events occur. As an example, for our non-interest sensitive products, we may experience accelerated amortization if policies terminate earlier than projected, or we may experience a slower rate of amortization if policies persist longer than projected. Our actual experience has not varied materially from our assumptions during the last three years.

See Note 1 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of our DAC accounting policy.

Effective January 1, 2023 we will adopt ASU 2018-12 which will significantly change how we account for the amortization of DAC. We are continuing our implementation efforts and are evaluating the effects of complying with this update. See "Accounting Developments" contained herein in this Item 7 and Note 1 of the "Notes to the Consolidated Financial Statements" contained herein in Item 8 for further discussion on the impacts upon adoption.

Fair Value of Investments

All of our fixed maturity securities, which are classified as available-for-sale, and all of our unrestricted equity securities are reported at fair value. Our derivative financial instruments, including certain derivative instruments embedded in other contracts, are reported as either assets or liabilities and measured at fair value. We report our investments in private equity partnerships at our share of the partnerships' net asset value or its equivalent (NAV), as a practical expedient for fair value.

Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date and therefore represents an exit price, not an entry price. The exit price objective applies regardless of our intent and/or ability to sell the asset or transfer the liability at the measurement date. We generally use valuation techniques consistent with the market approach, and to a lesser extent, the income approach. The market approach

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uses prices and other relevant information from market transactions involving identical or comparable assets or liabilities and the income approach converts future amounts, such as cash flows or earnings, to a single present value amount, or a discounted amount. We believe the market approach valuation technique provides more observable data than the income approach, considering the types of investments we hold.

The degree of judgment utilized in measuring the fair value of financial instruments generally correlates to the level of pricing observability. Financial instruments with readily available active quoted prices or for which fair value can be measured from actively quoted prices in active markets generally have more pricing observability and less judgment utilized in measuring fair value. The market sources from which we obtain or derive the fair values of our assets and liabilities carried at market value include quoted market prices for actual trades, price quotes from third party pricing vendors, price quotes we obtain from outside brokers, discounted cash flow, and observable prices for similar publicly traded or privately traded issues that incorporate the credit quality and industry sector of the issuer. Our fair value measurements could differ significantly based on the valuation technique and available inputs.

Inputs to valuation techniques refer broadly to the assumptions that market participants use in pricing assets or liabilities, including assumptions about risk, for example, the risk inherent in a particular valuation technique used to measure fair value and/or the risk inherent in the inputs to the valuation technique. We use observable and unobservable inputs in measuring the fair value of our financial instruments. Observable inputs are inputs that reflect the assumptions market participants would use in pricing the asset or liability developed based on market data obtained from independent sources. Unobservable inputs are developed based on the best information available in the circumstances, and reflect our evaluation of the assumptions market participants would use in pricing the asset or liability.

Certain of our investments do not have readily determinable market prices and/or observable inputs or may at times be affected by the lack of market liquidity. For these securities, we use internally prepared valuations, including valuations based on estimates of future profitability, to estimate the fair value. Additionally, we may obtain prices from independent third-party brokers to aid in establishing valuations for certain of these securities. Key assumptions used by us to determine fair value for these securities include risk-free interest rates, risk premiums, performance of underlying collateral (if any), and other factors involving significant assumptions which may or may not reflect those of an active market.

As of December 31, 2022, approximately 13.0 percent of our fixed maturity securities were categorized as Level 1, 86.5 percent as Level 2, and 0.5 percent as Level 3. Level 1 is the highest category of the three-level fair value hierarchy classification wherein inputs are unadjusted and represent quoted prices in active markets for identical assets or liabilities. The Level 2 category includes assets or liabilities valued using inputs (other than those included in the Level 1 category) that are either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instrument's anticipated life. The Level 3 category is the lowest category of the fair value hierarchy and reflects the judgment of management regarding what market participants would use in pricing assets or liabilities at the measurement date using unobservable inputs to extrapolate an estimated fair value.

Rapidly changing credit and equity market conditions can materially impact the valuation of securities, and the period to period changes in value can vary significantly.

See "Quantitative and Qualitative Disclosures about Market Risk" for information regarding the sensitivity of the estimated fair value for fixed maturity securities contained herein in Item 7A. See Note 2 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

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Investment Credit Losses

One of the significant estimates related to investments is our credit loss valuation. In determining when a decline in fair value below amortized cost of a fixed maturity security represents a credit loss, we evaluate the following factors:

•Whether we expect to recover the entire amortized cost basis of the security

•Whether we intend to sell the security or will be required to sell the security before the recovery of its amortized cost basis

•Whether the security is current as to principal and interest payments

•The significance of the decline in value

•Current and future business prospects and trends of earnings

•The valuation of the security’s underlying collateral

•Relevant industry conditions and trends relative to their historical cycles

•Market conditions

•Rating agency and governmental actions

•Bid and offering prices and the level of trading activity

•Adverse changes in estimated cash flows for securitized investments

•Changes in fair value subsequent to the balance sheet date

•Any other key measures for the related security

We evaluate available information, including the factors noted above, both positive and negative, in reaching our conclusions. In particular, we also consider the strength of the issuer’s balance sheet, its debt obligations and near term funding requirements, cash flow and liquidity, the profitability of its core businesses, the availability of marketable assets which could be sold to increase liquidity, its industry fundamentals and regulatory environment, and its access to capital markets. Although all available and applicable factors are considered in our analysis, our expectation of recovering the entire amortized cost basis of the security, whether we intend to sell the security, whether it is more likely than not we will be required to sell the security before recovery of its amortized cost, and whether the security is current on principal and interest payments are the most critical factors in determining whether a credit loss is possible. The significance of the decline in value is also an important factor, but we generally do not record a credit loss based solely on this factor, since often other more relevant factors will impact our evaluation of a security.

While determining whether a credit loss exists is a judgmental area, we utilize a formal, well-defined, and disciplined process to monitor and evaluate our fixed income investment portfolio, supported by issuer specific research and documentation as of the end of each period. The process results in a thorough evaluation of investments and the recording of credit losses on a timely basis for investments determined to have credit loss.

We use a comprehensive rating system to evaluate the investment and credit risk of our mortgage loans and to identify specific properties for inspection and reevaluation. We estimate an allowance for credit losses that we expect to incur over the life of our mortgage loans using a probability of default method. For each loan, we estimate the probability that the loan will default before its maturity (probability of default) and the amount of the loss if the loan defaults (loss given default). These two factors result in an expected loss percentage that is applied to the amortized cost of each loan to determine the expected credit loss. Mortgage loans are reported at amortized cost less the allowance for expected credit losses with the change in expected credit losses recognized as an investment loss in our consolidated statements of income.

There are a number of significant risks inherent in the process of monitoring our investments for credit losses and determining when and if a credit loss exists. These risks and uncertainties include the following possibilities:

•The assessment of a borrower's ability to meet its contractual obligations will change.

•The economic outlook, either domestic or foreign, may be less favorable or may have a more significant impact on the borrower than anticipated, and as such, the investment may not recover in value.

•New information may become available concerning the security, such as disclosure of accounting irregularities, fraud, or corporate governance issues.

•Significant changes in credit spreads may occur in the related industry.

•Significant increases in interest rates may occur and may not return to levels similar to when securities were initially purchased.

•Adverse rating agency actions may occur.

See Notes 1 and 3 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

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Pension and Postretirement Benefit Plans

We sponsor several defined benefit pension and other postretirement benefit (OPEB) plans for our employees, including non-qualified pension plans. The U.S. qualified and non-qualified defined benefit pension plans comprise the majority of our total benefit obligation and benefit cost. We maintain a separate defined benefit plan for eligible employees in our U.K. operation. The U.S. defined benefit pension plans were closed to new entrants on December 31, 2013, the OPEB plan was closed to new entrants on December 31, 2012, and the U.K. plan was closed to new entrants on December 31, 2002.

Assumptions

Our net periodic benefit costs and the value of our benefit obligations for these plans are determined based on a set of economic and demographic assumptions that represent our best estimate of future expected experience. Major assumptions used in accounting for these plans include the expected discount (interest) rate, the long-term rate of return on plan assets, and mortality rates. We also use, as applicable, expected increases in compensation levels and a weighted average annual rate of increase in the per capita cost of covered benefits, which reflects a health care cost trend rate, and the U.K. pension plan also uses expected cost of living increases to plan benefits.

The assumptions chosen for our pension and OPEB plans are reviewed annually, using a December 31 measurement date for each of our plans unless we are required to perform an interim remeasurement. The discount rate, expected long-term rate of return, and mortality rate assumptions have the most significant effect on our net periodic benefit costs associated with these plans. In addition to the effect of changes in our assumptions, the net periodic cost or benefit obligation under our pension and OPEB plans may change due to factors such as plan amendments, actual experience being different from our assumptions, special benefits to terminated employees, and/or changes in benefits provided under the plans.

•Discount rate - This interest assumption is based on the yield derived from a portfolio of high quality fixed income corporate debt instruments that reasonably match the timing and amounts of projected future benefits for each of our retirement-related benefit plans. The rate is determined at the measurement date.

•Long-term rate of return - This assumption is selected from a range of probable return outcomes from an analysis of the asset portfolio. The market-related value as it relates to our estimate of long-term rate of return equals the fair value of plan assets, determined as of the measurement date. The return on plan assets recognizes all asset gains and losses, including changes in fair value, through the measurement date. Our expectations for the future investment returns of the asset categories are based on a combination of historical market performance, evaluations of investment forecasts obtained from external consultants and economists, and current market yields. The expected return for the total portfolio is calculated based on the plan's strategic asset allocation. The actual rate of return on plan assets is determined based on the fair value of the plan assets at the beginning and the end of the period, adjusted for contributions and benefit payments. A lower long-term rate of return on plan assets increases our net periodic benefit cost.

Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies, and quarterly investment portfolio reviews.  Risk tolerance is established through consideration of plan liabilities, plan funded status, and corporate financial condition. We believe our investment portfolios are well diversified by asset class and sector, with no undue risk concentrations in any one category. See Note 9 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of the investment portfolios for our plans.

•Mortality rate - This assumption reflects our best estimate, as of the measurement date, of the life expectancies of plan participants in order to determine the expected length of time for benefit payments. We derive our assumptions from industry mortality tables.

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The weighted average assumptions used in the measurement of our net periodic benefit costs for the years ended December 31 are as follows:

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
Assumption	2023		2022		2023		2022		2023		2022
Discount Rate	5.70	%	3.10	%	4.80	%	2.00	%	5.70	%	2.90	%
Expected Long-term Rate of Return on Plan Assets	7.25	%	6.00	%	6.70	%	4.20	%	5.75	%	5.75	%

The following illustrates the sensitivity of the below items to a 50 basis point change in the discount rate or the expected long-term rate of return on plan assets:

($ in millions)	At or for the Year Ended December 31, 2022
Assumption	Change	Net Periodic Benefit Cost, Before Tax		Benefit Obligation		Stockholders' Equity, After Tax
Discount Rate	+ 50 bp	$	(1.7)	$	(103.6)	$	82.1
Discount Rate	- 50 bp	0.6		113.7		(90.1)
Expected Long-term Rate of Return on Plan Assets	+ 50 bp	(10.2)		N/A		N/A
Expected Long-term Rate of Return on Plan Assets	- 50 bp	10.2		N/A		N/A

Benefit Obligation and Fair Value of Plan Assets

During 2022, the fair value of plan assets in our U.S. qualified defined benefit pension plan decreased $493.4 million, or 27.4 percent due to an unfavorable return on assets which resulted in a loss of approximately 22.8 percent and the payment of benefits and expenses. The fair value of plan assets in our U.K. pension plan decreased £108.1 million, or 48.2 percent, due primarily to an unfavorable return on assets which resulted in a loss of approximately 46.2 percent. Although our rate of return on plan assets for 2022 was lower than our assumptions used in the measurement of our net periodic benefit costs, we believe our assumptions appropriately reflect the impact of the current economic environment and our expectations for the future investment returns based on the plan's asset allocation.

As of December 31, 2022, our pension and OPEB plans have an aggregate unrecognized net actuarial loss of $569.9 million and an unrecognized prior service credit of $1.7 million, which together represent the cumulative liability and asset gains and losses as well as the portion of prior service credits that have not been recognized in pension expense. The unrecognized net actuarial loss for our pension plans, which is $601.5 million at December 31, 2022, will be amortized over the average remaining life expectancy of the plan, which is approximately 24 years for the U.S. plan and 28 years for the U.K. plan, to the extent that it exceeds the 10 percent corridor, as described below. The unrecognized net actuarial gain of $31.6 million for our OPEB plan will be amortized over the average future working life of OPEB plan participants, estimated at two years, to the extent the gain is outside of the corridor. The corridor for the pension and OPEB plans is established based on the greater of 10 percent of the plan assets or 10 percent of the benefit obligation.  At December 31, 2022, $358.4 million of the actuarial loss was outside of the corridor for the U.S. plans and £56.2 million was outside of the corridor for the U.K. plan. At December 31, 2022, $23.1 million of the actuarial gain was outside of the corridor for the OPEB plan.

The amortization of the unrecognized actuarial gain or loss and the unrecognized prior service credit is a component of our net periodic benefit cost and equaled $15.5 million, $22.4 million, and $19.7 million in 2022, 2021, and 2020, respectively.

The fair value of plan assets in our U.S. qualified defined benefit pension plan was $1,308.3 million at December 31, 2022, compared to $1,801.7 million at December 31, 2021. The plan was in an underfunded position of $118.7 million and $185.6 million at December 31, 2022 and December 31, 2021, respectively. This year-over-year change was due primarily to the decrease in the benefit obligation due to the increase in discount rate, partially offset by a loss on plan assets.

The fair value of plan assets in our U.K. pension plan was £116.3 million at December 31, 2022, compared to £224.4 million at December 31, 2021. The U.K. pension plan was in an underfunded position of £14.4 million and in an overfunded position of £18.8 million at December 31, 2022 and 2021, respectively. This year-over-year change was due primarily to a loss on plan assets, partially offset by the decrease in the benefit obligation due to the increase in discount rate.

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The fair value of plan assets in our OPEB plan was $8.5 million and $9.0 million at December 31, 2022 and 2021, respectively. These assets represent life insurance contracts to fund the life insurance benefit portion of our OPEB plan. Our OPEB plan represents a non-vested, non-guaranteed obligation, and current regulations do not require specific funding levels for these benefits, which are comprised of retiree life, medical, and dental benefits. It is our practice to use general assets to pay medical and dental claims as they come due in lieu of utilizing plan assets for the medical and dental benefit portions of our OPEB plan.

See Note 9 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

Income Taxes

We provide for federal, state, and foreign income taxes currently payable, as well as those deferred due to temporary differences between the financial reporting and tax bases of assets and liabilities.  Our accounting for income taxes represents our best estimate of various events and transactions. The calculation of our tax liabilities involves dealing with uncertainties in the application of complex tax laws in a multitude of jurisdictions, both domestic and foreign.  The amount of income taxes we pay is subject to ongoing audits in various jurisdictions, and a material assessment by a governing tax authority could affect profitability.

We record a valuation allowance to reduce deferred tax assets to the amount that is more likely than not to be realized.  Significant judgment is required in determining valuation allowances. In evaluating the ability to recover deferred tax assets, we consider all available positive and negative evidence including past operating results, the existence of cumulative losses in the most recent years, forecasted earnings, future taxable income, and prudent and feasible tax planning strategies.  We consider our investment strategies when evaluating the ability to recover deferred tax assets on unrealized losses on investments. In the event we determine that we most likely will not be able to realize all or part of our deferred tax assets in the future, an increase to the valuation allowance is recorded in the period such determination is made.  Likewise, if it is later determined that it is more likely than not that those deferred tax assets will be realized, the previously provided valuation allowance is reversed.

In establishing a liability for unrecognized tax benefits, assumptions are made in determining whether, and to what extent, a tax position may be sustained. GAAP prescribes a recognition threshold and measurement attribute for the financial statement recognition and measurement of tax positions taken or expected to be taken in income tax returns. The evaluation of a tax position is a two step process. The first step is to determine whether it is more likely than not that a tax position will be sustained upon examination based on the technical merits of the position. The second step is to measure a position that satisfies the recognition threshold at the largest amount of benefit that is greater than 50 percent likely of being realized upon ultimate settlement. Tax positions that previously failed to meet the more likely than not threshold but that now satisfy the recognition threshold are recognized in the first subsequent financial reporting period in which that threshold is met. Previously recognized tax positions that no longer meet the more likely than not recognition threshold are derecognized in the first subsequent financial reporting period in which that threshold is no longer met. If a previously recognized tax position is settled for an amount that is different from the amount initially measured, the difference will be recognized as a tax benefit or expense in the period the settlement is effective.

Changes in tax laws, tax regulations, or interpretations of such laws or regulations, could have an impact on our provision for income tax and our effective tax rate, which could significantly affect the amounts reported in our financial statements.

See "Regulation" contained herein in Item 1. See Note 7 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Contingent Liabilities

On a quarterly basis, we review relevant information with respect to litigation and contingencies to be reflected in our consolidated financial statements. An estimated loss is accrued when it is probable that a liability has been incurred and the amount of the loss can be reasonably estimated. It is possible that our results of operations or cash flows in a particular period could be materially affected by an ultimate unfavorable outcome of pending litigation or regulatory matters depending, in part, on our results of operations or cash flows for the particular period.  See Note 14 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

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Accounting Developments

In 2018, the Financial Accounting Standards Board issued Accounting Standard Update 2018-12, “Targeted Improvements to the Accounting for Long-Duration Contracts”. The update is effective for periods beginning January 1, 2023. We will adopt this update effective January 1, 2023 using the modified retrospective approach with changes applied as of the beginning of the earliest period presented or January 1, 2021, also referred to as the transition date. We are continuing our implementation efforts and are evaluating the effects of complying with this update.

Our modified retrospective adoption is expected to result in an increase to net income and after-tax adjusted operating income during 2021 and 2022. We expect the increase in 2021 net income to be between approximately $145 million and $175 million, or between $0.70 and $0.85 per diluted per common share. We expect the increase in 2022 net income to be between approximately $80 million and $110 million, or $0.40 and $0.55 per diluted common share. We expect the increase in 2021 after-tax adjusted operating income to be between approximately $25 million and $55 million, or between $0.12 and $0.27 per diluted common share. We expect the increase in 2022 after-tax adjusted operating income to be between approximately $95 million and $125 million, or $0.47 and $0.62 per diluted common share.

The net favorable impact of the recast of our after-tax adjusted operating income for 2021 and 2022 shown above is due primarily to the following changes:

•Updating the lifetime cohort net premium ratios (lifetime loss ratio) for actual experience each reporting period will generally cause earnings patterns to be more consistent from period to period, with variances in experience reflected in earnings over the cohort lifetime. This will result in an unfavorable impact to income for 2021 and 2022. Our Unum US supplemental and voluntary, Colonial Life, and certain of our Closed Block product lines were most affected by this change due to generally favorable benefits experience observed during 2021 and 2022.

•Alignment of amortization of deferred acquisition costs to a constant level basis and modification of amortization periods to reflect the expected term of the related contracts could result in either higher or lower income for the affected product lines. This will result in a net favorable impact to income for 2021 and 2022. Our Unum US and Colonial Life product lines were most affected by this change with an overall increased amortization period.

•Accelerated recognition of the provision for adverse deviation or other differences from current best estimate values for policies issued prior to the transition date and due to not establishing the provision for policies issued on or after the transition date will generally result in higher income most notably in the initial years after the transition date. This will result in a favorable impact to income for 2021 and 2022. Our Unum US supplemental and voluntary and Colonial Life product lines were most affected by this change.

•Establishing reserves for claims incurred on or after the transition date at interest rates prescribed by the update could result in either higher or lower income for the affected product lines depending on the policy issue date and the interest rate environment at that time. This will result in an unfavorable impact to income for 2021 and a favorable impact to income for 2022. Certain of our Unum US and Closed Block product lines were most affected by this change.

•Updating cash flow assumptions could result in either higher or lower income. Certain of our Unum US, Colonial Life, and Closed Block product lines were most affected by this change.

We expect that all of the above changes will continue to impact our earnings in periods subsequent to 2021 and 2022 to varying degrees and over varying time periods.

We do not have products with market risk benefits. This update will also significantly expand our disclosures.

Although this update will significantly impact our GAAP-based financial position and results of operations, the update will not impact cash flows, statutory-based financial position or results of operations, or our view of our businesses.

For further information on new accounting standards and the impacts on our financial position and results of operations, see Note 1 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

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Consolidated Operating Results

(in millions of dollars)
	Year Ended December 31
	2022		% Change		2021		% Change		2020
Revenue
Premium Income	$	9,623.4	1.5	%	$	9,481.0	1.1	%	$	9,378.1
Net Investment Income	2,122.2		(4.1)		2,213.2		(6.2)		2,360.7
Net Investment Gain (Loss)	(15.7)		(120.5)		76.7		(93.6)		1,199.1
Other Income	261.1		7.5		242.9		8.3		224.2
Total Revenue	11,991.0		(0.2)		12,013.8		(8.7)		13,162.1
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	6,936.7		(8.7)		7,598.6		(15.3)		8,972.9
Commissions	1,086.4		4.7		1,038.1		(1.8)		1,057.3
Interest and Debt Expense	188.5		1.9		185.0		(1.7)		188.2
Cost Related to Early Retirement of Debt	4.2		(93.8)		67.3		N.M.		—
Deferral of Acquisition Costs	(556.9)		9.6		(508.1)		(11.8)		(576.2)
Amortization of Deferred Acquisition Costs	591.0		0.8		586.1		(3.3)		606.1
Compensation Expense	1,089.5		11.7		975.2		2.3		953.2
Other Expenses	1,020.2		1.2		1,008.6		1.2		996.6
Total Benefits and Expenses	10,359.6		(5.4)		10,950.8		(10.2)		12,198.1
Income Before Income Tax	1,631.4		53.5		1,063.0		10.3		964.0
Income Tax	317.2		32.8		238.8		39.6		171.0
Net Income	$	1,314.2	59.5		$	824.2	3.9		$	793.0
N.M. = not a meaningful percentage

Fluctuations in exchange rates, particularly between the British pound sterling and the U.S. dollar for our U.K. operations, have an effect on our consolidated financial results. In periods when the pound weakens relative to the preceding period, translating pounds into dollars decreases current period results relative to the prior period. In periods when the pound strengthens, translating pounds into dollars increases current period results relative to the prior period.

The weighted average pound/dollar exchange rate for our Unum UK line of business was 1.222, 1.377, and 1.287 for 2022, 2021, and 2020, respectively. If the 2021 and 2020 results for our U.K. operations had been translated at the 2022 exchange rate, our adjusted operating revenue by segment would have been lower by approximately $84 million and $32 million in 2021 and 2020, respectively. Additionally, our adjusted operating income would have been lower by approximately $11 million and $4 million in 2021 and 2020, respectively. However, it is important to distinguish between translating and converting foreign currency. Except for a limited number of transactions, we do not actually convert pounds into dollars. As a result, we view foreign currency translation as a financial reporting item and not a reflection of operations or profitability in the U.K.

Premium income increased in 2022 compared to 2021 due primarily to increases in each of our principal operating business segments, while premium income declined in our Closed Block segment. Premium income increased in 2021 compared to 2020 due primarily to increases in our Unum US and Unum International segments, partially offset by a decrease in our Colonial Life segment.

Net investment income was lower in 2022, relative to 2021, due to lower miscellaneous investment income and a decline in the yield on invested assets, partially offset by higher investment income from inflation index-linked bonds held by Unum UK and a higher level of invested assets. Net investment income in 2021 was lower than 2020 due to a decrease in the level of invested assets supporting the Closed Block individual disability product line resulting from the previously discussed reinsurance

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transaction and a decline in the yield on invested assets, partially offset by higher miscellaneous investment income, particularly related to our private equity partnerships.

Credit losses on fixed maturity securities of $4.6 million were recognized in net investment gains and losses in 2022 compared to $9.3 million and $53.6 million in 2021 and 2020, respectively. Also included in net investment gains and losses were changes in the fair value of an embedded derivative in a modified coinsurance arrangement, which resulted in gains (losses) of $16.2 million, $9.7 million, and $(17.0) million in 2022, 2021, and 2020, respectively. The changes in the embedded derivative are primarily driven by movements in credit spreads in the overall investment market. Included in the net investment gains and losses in 2021 and 2020 were net realized investment gains of $67.6 million and $1,302.3 million, respectively, related to the transfer of investments in the Closed Block individual disability reinsurance transaction. Included in the net investment gains and losses in 2020 were $36.6 million of impairment losses related to certain of our home office buildings available for lease and classified as investment real estate. See Notes 3 and 4 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

Other income is primarily comprised of fee-based service products in the Unum US segment, which include leave management services and administrative services only (ASO) business, and the underlying results and associated net investment income of certain assumed blocks of reinsured business in the Closed Block segment.

Overall benefits experience was favorable in 2022 relative to 2021 and 2020 with a consolidated benefit ratio of 72.1 percent in 2022, compared to 80.1 percent and 95.7 percent in 2021 and 2020, respectively. Excluding the impacts of the reserve assumption updates and the impacts from both phases of the Closed Block individual disability reinsurance transaction, the consolidated benefit ratios were 73.7 percent, 80.7 percent, and 80.2 percent in 2022, 2021, and 2020 respectively. For further discussion on the reserve assumption updates and the Closed Block individual disability reinsurance transaction, see the "Executive Summary" contained herein in this Item 7 and Notes 6 and 12 of the "Notes to Consolidated Financial Statements" contained herein in Item 8. The underlying benefits experience for each of our operating business segments is discussed more fully in "Segment Results" contained herein in this Item 7.

Commissions and the deferral of acquisition costs were higher in 2022 compared to 2021 driven primarily by in-force block growth in our Unum US segment and higher sales in our Colonial Life and Unum US segments. Also impacting the increase in the deferral of acquisition costs in 2022 was lower expected recoverability for the Unum US group life product line in 2021 that did not recur in 2022. The amortization of deferred acquisition costs was slightly higher compared to 2021 due primarily to a higher level of policy terminations for our Colonial Life segment, partially offset by a lower level of policy terminations related to newer policies in the Unum US voluntary benefits product line. Commissions and the deferral of acquisition costs were lower in 2021 compared to 2020 driven primarily by lower sales in our Unum US voluntary benefits product line and lower prior period sales in the Colonial Life segment. Also impacting the decrease in the deferral of acquisition costs in 2021 compared to 2020 was lower expected recoverability in the short-term for the Unum US group life product line. The decrease in commissions in 2021 compared to 2020 was partially offset by in-force block growth in both the Unum US group disability product line and the Unum International segment. The amortization of deferred acquisition costs was lower in 2021 compared to 2020, due to a decline in the level of the deferred asset primarily in our Unum US voluntary benefits product line.

In 2022, cost related to early retirement of debt includes costs associated with the redemption of $350.0 million aggregate principal amount of our 4.000% senior notes due 2024 and costs related to the retirement of $14.0 million aggregate liquidation amount of the 7.405% capital securities due 2038 issued by Provident Financing Trust I (the Trust), which resulted in the reduction of a corresponding principal amount of our 7.405% junior subordinated debt securities due 2038 then held by the Trust. In 2021, cost related to early retirement of debt includes costs associated with the purchase and retirement of $500.0 million aggregate principal amount of our 4.500% senior notes due 2025. See Note 8 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further information.

Other expenses and compensation expense, on a combined basis, increased in 2022 compared to 2021 due primarily to increases in employee-related costs, operational investments in our business, and growth in our fee-based service products. The increases are partially offset by a reduction in the amortization of the cost of reinsurance. Other expenses and compensation expense, on a combined basis, increased in 2021 compared to 2020 due primarily to the amortization of the cost of reinsurance related to the Closed Block individual disability reinsurance transaction, an impairment loss on internal-use software, and growth in our fee-based service products, partially offset by lower transaction costs related to the Closed Block individual disability reinsurance transaction, a decrease in the allowance for expected credit losses on premiums receivable and our continued focus on expense management and operating efficiencies.

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Our effective income tax rate for 2022 was 19.4 percent, compared to 22.5 percent in 2021 and 17.7 percent in 2020. Our 2022 effective tax rate differed from the U.S. statutory rate of 21 percent primarily due to the foreign tax rate differential. Our 2021 effective tax rate differed from the U.S. statutory rate due to unfavorable impacts of the U.K. tax rate increase enacted in June 2021. Our 2020 effective tax rate differed from the U.S. statutory rate due to favorable adjustments related to the impact of the net operating loss carryback and favorable tax credits, partially offset by the unfavorable impact of the U.K tax rate increase enacted in July 2020. See Note 7 in the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion.

Consolidated Sales Results

Shown below are sales results for our three principal operating business segments.

(in millions)
	Year Ended December 31
	2022		% Change		2021		% Change		2020
Unum US	$	1,115.3	18.4	%	$	941.7	(5.8)	%	$	999.6
Unum International	$	133.7	26.4	%	$	105.8	16.9	%	$	90.5
Colonial Life	$	508.1	5.9	%	$	479.8	16.1	%	$	413.1

Sales shown in the preceding chart generally represent the annualized premium income on new sales which we expect to receive and report as premium income during the next 12 months following or beginning in the initial quarter in which the sale is reported, depending on the effective date of the new sale. Sales do not correspond to premium income reported as revenue in accordance with GAAP. This is because new annualized sales premiums reflect current sales performance and what we expect to recognize as premium income over a 12 month period, while premium income reported in our financial statements is reported on an "as earned" basis rather than an annualized basis and also includes renewals and persistency of in-force policies written in prior years as well as current new sales.

Sales, persistency of the existing block of business, employment and salary growth, and the effectiveness of a renewal program are indicators of growth in premium income. Trends in new sales, as well as existing market share, also indicate the potential for growth in our respective markets and the level of market acceptance of price levels and new product offerings. Sales results may fluctuate significantly due to case size and timing of sales submissions.

See "Segment Results" as follows for a discussion of sales by segment.

Segment Results

Our reporting segments are comprised of the following: Unum US, Unum International, Colonial Life, Closed Block, and Corporate. Financial information for each of our reporting segments is as follows.

In describing our results, we may at times note certain items and exclude the impact on financial ratios and metrics to enhance the understanding and comparability of our operational performance and the underlying fundamentals, but this exclusion is not an indication that similar items may not recur. We also measure and analyze our segment performance on the basis of "adjusted operating revenue" and "adjusted operating income" or "adjusted operating loss", which differ from total revenue and income before income tax as presented in our consolidated statements of income due to the exclusion of investment gains and losses and certain other items. These performance measures are in accordance with GAAP guidance for segment reporting, but they should not be viewed as a substitute for total revenue, income before income tax, or net income.  See "Reconciliation of Non-GAAP Financial Measures" contained herein in this Item 7.

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Unum US Segment

The Unum US segment is comprised of the group disability, group life and accidental death and dismemberment, and supplemental and voluntary lines of business. The group disability line of business includes long-term and short-term disability, medical stop-loss, and fee-based service products. The supplemental and voluntary line of business includes voluntary benefits, individual disability, and dental and vision products.

Unum US Operating Results

Shown below are financial results for the Unum US segment. In the sections following, financial results and key ratios are also presented for the major lines of business within the segment.

(in millions of dollars, except ratios)
	Year Ended December 31
	2022			% Change		2021			% Change		2020
Adjusted Operating Revenue
Premium Income	$	6,258.3		3.0	%	$	6,078.0		1.0	%	$	6,018.9
Net Investment Income	676.3			(6.3)		721.6			0.2		720.3
Other Income	196.3			15.5		170.0			9.7		154.9
Total	7,130.9			2.3		6,969.6			1.1		6,894.1
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	3,941.5			(9.2)		4,338.8			4.8		4,138.7
Commissions	614.4			5.3		583.4			(1.9)		594.9
Deferral of Acquisition Costs	(273.1)			12.5		(242.7)			(16.7)		(291.5)
Amortization of Deferred Acquisition Costs	294.9			(7.6)		319.0			(6.5)		341.0
Other Expenses	1,427.5			10.6		1,291.2			0.4		1,285.6
Total	6,005.2			(4.5)		6,289.7			3.6		6,068.7
Income Before Income Tax and Net Investment Gains and Losses	1,125.7			65.6		679.9			(17.6)		825.4
Reserve Assumption Updates	(155.0)			(27.9)		(215.0)			N.M.		—
Adjusted Operating Income	$	970.7		108.8		$	464.9		(43.7)		$	825.4
Operating Ratios (% of Premium Income):
Benefit Ratio1	65.5		%			74.9		%			68.8		%
Other Expense Ratio2	22.1		%			20.7		%			20.8		%
Income Ratio	18.0		%			11.2		%
Adjusted Operating Income Ratio	15.5		%			7.6		%			13.7		%
1Excludes the $155.0 million and $215.0 million reserve decreases related to the assumption updates that occurred during the third quarters of 2022 and 2021, respectively.
2Ratio of Other Expenses to Premium Income plus Unum US Group Disability Other Income, which is primarily related to fee-based services.
N.M. = not a meaningful percentage

63

Unum US Group Disability Operating Results

Shown below are financial results and key performance indicators for Unum US group disability.

(in millions of dollars, except ratios)
	Year Ended December 31
	2022			% Change		2021			% Change		2020
Adjusted Operating Revenue
Premium Income
Group Long-term Disability	$	1,911.7		4.6	%	$	1,827.8		—	%	$	1,828.5
Group Short-term Disability	926.3			7.2		864.0			8.1		799.2
Total Premium Income	2,838.0			5.4		2,691.8			2.4		2,627.7
Net Investment Income	349.1			(8.0)		379.6			(2.4)		388.8
Other Income	191.8			15.8		165.7			12.3		147.6
Total	3,378.9			4.4		3,237.1			2.3		3,164.1
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	1,771.1			(4.2)		1,849.2			(3.8)		1,921.9
Commissions	211.3			5.8		199.8			4.2		191.8
Deferral of Acquisition Costs	(53.1)			6.6		(49.8)			1.0		(49.3)
Amortization of Deferred Acquisition Costs	51.8			0.8		51.4			(3.2)		53.1
Other Expenses	862.3			11.4		773.9			2.3		756.6
Total	2,843.4			0.7		2,824.5			(1.7)		2,874.1
Income Before Income Tax and Net Investment Gains and Losses	535.5			29.8		412.6			42.3		290.0
Reserve Assumption Updates	(121.0)			(43.7)		(215.0)			N.M.		—
Adjusted Operating Income	$	414.5		109.8		$	197.6		(31.9)		$	290.0
Operating Ratios (% of Premium Income):
Benefit Ratio1	66.7		%			76.7		%			73.1		%
Other Expense Ratio2	28.5		%			27.1		%			27.3		%
Income Ratio	18.9		%			15.3		%
Adjusted Operating Income Ratio	14.6		%			7.3		%			11.0		%
Persistency:
Group Long-term Disability	90.7		%			89.6		%			90.8		%
Group Short-term Disability	88.9		%			87.4		%			88.7		%
1Excludes the $121.0 million and $215.0 million reserve decreases related to the assumption updates that occurred during the third quarters of 2022 and 2021, respectively.
2Ratio of Other Expenses to Premium Income plus Other Income, which is primarily related to fee-based services.
N.M. = not a meaningful percentage

64

Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Premium income increased compared to 2021, driven primarily by in-force block growth and favorable persistency. Net investment income was lower compared to 2021 due to lower miscellaneous investment income, a decrease in the yield on invested assets, and a lower level of invested assets. Other income increased relative to 2021 due primarily to continued growth in our fee-based service products.

Benefits experience, excluding the impacts of the reserve assumption updates, was favorable compared to 2021 due primarily to lower claims incidence in both the group short-term and long-term disability product lines as well as favorable claim recoveries in our group long-term disability product line. See "Executive Summary” contained herein in this Item 7 and Note 6 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion on the reserve assumption updates.

Commissions were higher compared to 2021 due primarily to in-force block growth and favorable persistency. The deferral of acquisition costs was higher compared to 2021 due primarily to higher sales. The amortization of deferred acquisition costs was generally consistent with 2021. The other expense ratio, which includes other income that is primarily related to fee-based service products, increased compared to 2021 due primarily to increases in employee-related costs and an increase in operational investments in our business, particularly related to our growing fee-based service business.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Premium income increased compared to 2020, driven primarily by growth in our group short-term disability and medical stop-loss product lines, partially offset by lower persistency. Net investment income was lower relative to 2020 due to a decline in yield on invested assets, partially offset by higher miscellaneous investment income. Other income increased relative to 2020 due to continued growth in our fee-based service products.

Benefits experience, excluding the impact of the reserve assumption update, was unfavorable compared to 2020 due to higher claims incidence in both the group long-term and short-term disability product lines, partially offset by favorable recoveries in the long-term disability product line.

Commissions were higher compared to 2020 due primarily to in-force block growth in the group short-term disability and medical stop-loss product lines. The deferral of acquisition costs was generally consistent with 2020. The amortization of deferred acquisition costs decreased compared to 2020 due to a decline in the level of the deferred asset. The other expense ratio was generally consistent with 2020.

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Unum US Group Life and Accidental Death and Dismemberment Operating Results

Shown below are financial results and key performance indicators for Unum US group life and accidental death and dismemberment.

(in millions of dollars, except ratios)
	Year Ended December 31
	2022			% Change		2021			% Change		2020
Adjusted Operating Revenue
Premium Income
Group Life	$	1,669.1		1.7	%	$	1,641.9		0.1	%	$	1,640.5
Accidental Death & Dismemberment	173.7			5.2		165.1			0.7		163.9
Total Premium Income	1,842.8			2.0		1,807.0			0.1		1,804.4
Net Investment Income	100.3			(3.6)		104.0			7.0		97.2
Other Income	1.6			(5.9)		1.7			(29.2)		2.4
Total	1,944.7			1.7		1,912.7			0.5		1,904.0
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	1,415.2			(18.1)		1,728.8			17.6		1,470.4
Commissions	150.4			3.9		144.7			1.0		143.2
Deferral of Acquisition Costs	(37.3)			77.6		(21.0)			(41.7)		(36.0)
Amortization of Deferred Acquisition Costs	33.2			(13.3)		38.3			(2.5)		39.3
Other Expenses	231.1			8.1		213.8			4.1		205.3
Total	1,792.6			(14.8)		2,104.6			15.5		1,822.2
Income (Loss) Before Income Tax and Net Investment Gains and Losses	152.1			(179.3)		(191.9)			N.M.		81.8
Reserve Assumption Update	(34.0)			N.M.		—			N.M.		—
Adjusted Operating Income (Loss)	$	118.1		(161.5)		$	(191.9)		N.M.		$	81.8
Operating Ratios (% of Premium Income):
Benefit Ratio1	78.6		%			95.7		%			81.5		%
Other Expense Ratio	12.5		%			11.8		%			11.4		%
Income (Loss) Ratio	8.3		%
Adjusted Operating Income (Loss) Ratio	6.4		%			(10.6)		%			4.5		%
Persistency:
Group Life	88.9		%			89.7		%			88.8		%
Accidental Death & Dismemberment	87.9		%			89.1		%			88.2		%
1Excludes the $34.0 million reserve decrease related to the assumption update that occurred during the third quarter of 2022.
N.M. = not a meaningful percentage

66

Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Premium income was higher compared to 2021 driven by in-force block growth, partially offset by lower persistency. Net investment income was lower compared to 2021 due to lower miscellaneous investment income, partially offset by an increase in the level of invested assets and an increase in the yield on invested assets.

Benefits experience, excluding the impact of the reserve assumption update, was favorable compared to 2021 largely due to lower mortality in the group life product line, resulting primarily from lessening impacts of COVID-19 on our insured population.

Commissions were higher compared to 2021 due primarily to in-force block growth. The deferral of acquisition costs was higher compared to 2021 primarily due to $15.1 million of acquisition costs that were not deferred in 2021 as a result of lower expected recoverability driven by COVID-19 related life claims. The amortization of deferred acquisition costs was lower compared to 2021 due to a decline in the level of the deferred asset. The other expense ratio increased compared to 2021 due primarily to an increase in employee-related costs and operational investments in our business.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Premium income was generally consistent with 2020. Net investment income was higher compared to 2020 due to increased miscellaneous investment income and a higher level of invested assets, partially offset by a decline in yield on invested assets.

Benefits experience was unfavorable compared to 2020 due to higher mortality in the group life product line, resulting primarily from the impacts of COVID-19 on our insured population.

Commissions were higher compared to 2020 due primarily to in-force block growth. The deferral of acquisition costs was lower compared to 2020 due to lower expected recoverability in the short-term driven by COVID-19 related life claims. The amortization of deferred acquisition costs was lower compared to 2020 due to a decline in the level of the deferred asset. The other expense ratio increased compared to 2020 due primarily to an increase in operational investments in our business, partially offset by our continued focus on expense management and operating efficiencies.

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Unum US Supplemental and Voluntary Operating Results

Shown below are financial results and key performance indicators for Unum US supplemental and voluntary product lines.

(in millions of dollars, except ratios)
	Year Ended December 31
	2022			% Change		2021			% Change		2020
Adjusted Operating Revenue
Premium Income
Voluntary Benefits	$	840.6		(0.7)	%	$	846.7		(3.3)	%	$	875.2
Individual Disability	461.1			0.3		459.8			0.8		456.0
Dental and Vision	275.8			1.1		272.7			6.7		255.6
Total Premium Income	1,577.5			(0.1)		1,579.2			(0.5)		1,586.8
Net Investment Income	226.9			(4.7)		238.0			1.6		234.3
Other Income	2.9			11.5		2.6			(46.9)		4.9
Total	1,807.3			(0.7)		1,819.8			(0.3)		1,826.0
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	755.2			(0.7)		760.8			1.9		746.4
Commissions	252.7			5.8		238.9			(8.1)		259.9
Deferral of Acquisition Costs	(182.7)			6.3		(171.9)			(16.6)		(206.2)
Amortization of Deferred Acquisition Costs	209.9			(8.5)		229.3			(7.8)		248.6
Other Expenses	334.1			10.1		303.5			(6.2)		323.7
Total	1,369.2			0.6		1,360.6			(0.9)		1,372.4
Adjusted Operating Income	$	438.1		(4.6)		$	459.2		1.2		$	453.6
Operating Ratios (% of Premium Income):
Benefit Ratios:
Voluntary Benefits	42.1		%			43.2		%			42.2		%
Individual Disability	44.1		%			42.8		%			48.8		%
Dental and Vision	71.6		%			72.6		%			60.6		%
Other Expense Ratio	21.2		%			19.2		%			20.4		%
Adjusted Operating Income Ratio	27.8		%			29.1		%			28.6		%
Persistency:
Voluntary Benefits	75.8		%			75.8		%			72.7		%
Individual Disability	89.5		%			89.7		%			89.5		%
Dental and Vision	79.9		%			86.0		%			85.0		%

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Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Premium income was generally consistent with 2021, with a decline in the voluntary benefits product line, mostly offset by growth in the individual disability and dental and vision product lines. Net investment income decreased compared to 2021 due primarily to lower miscellaneous investment income and a decrease in the level of invested assets.

Benefits experience for voluntary benefits was favorable compared to 2021 due to favorable claims experience in most products, including within the life product line resulting primarily from lessening impacts of COVID-19 on our insured population. Benefits experience for the individual disability product line was unfavorable compared to 2021 due primarily to a change in estimate related to the unearned premium reserve in the fourth quarter of 2022 as well as higher average benefit size. Benefits experience for the dental and vision product line was favorable compared to 2021 due primarily to lower claims incidence.

Commissions and the deferral of acquisition costs were higher compared to 2021 due primarily to higher sales in the individual disability and voluntary benefits product lines. The amortization of deferred acquisition costs decreased compared to 2021 due to a lower level of policy terminations related to newer policies, primarily in the voluntary benefits product line. The other expense ratio increased compared to 2021 due primarily to an increase in employee-related costs, a net loss recognized in the fourth quarter of 2022 on the recapture of a block of business in the voluntary benefits product line, and an increase in operational investments in our business, partially offset by a decrease in the allowance for expected credit losses on premium receivable balances.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Premium income decreased compared to 2020, with a decline in the voluntary benefits product line partially offset by growth in the dental and vision and individual disability product lines. Net investment income increased in 2021 compared to 2020 due to higher miscellaneous investment income, partially offset by a decline in yield on invested assets.

Benefits experience for voluntary benefits was less favorable compared to 2020 due primarily to higher incidence in the life product line resulting from the impacts of COVID-19 on our insured population. Benefits experience for the individual disability product line was favorable compared to 2020 due primarily to lower claims incidence. Benefits experience for the dental and vision product line was unfavorable due primarily to higher claims incidence compared to 2020 where we experienced significantly lower claims incidence resulting from the impacts of COVID-19.

Commissions and the deferral of acquisition costs were lower compared to 2020 due primarily to lower sales in the voluntary benefits product line. The amortization of deferred acquisition costs decreased compared to 2020 due to a decline in the level of the deferred asset, primarily in the voluntary benefits product line. The other expense ratio improved compared to 2020 due to our continued focus on expense management and operational efficiencies. Also contributing to the improvement was the change in the allowance for expected credit losses on premiums receivable, which was lower in 2021 compared to 2020.

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Sales

(in millions of dollars)
	Year Ended December 31
	2022		% Change		2021		% Change		2020
Sales by Product
Group Disability and Group Life and AD&D
Group Long-term Disability	$	295.3	42.9	%	$	206.6	(13.8)	%	$	239.7
Group Short-term Disability	184.3		29.2		142.7		(10.1)		158.7
Group Life and AD&D	232.4		3.8		223.8		(0.2)		224.3
Subtotal	712.0		24.2		573.1		(8.0)		622.7
Supplemental and Voluntary
Voluntary Benefits	238.7		3.2		231.2		(4.3)		241.6
Individual Disability	90.8		21.1		75.0		5.0		71.4
Dental and Vision	73.8		18.3		62.4		(2.3)		63.9
Subtotal	403.3		9.4		368.6		(2.2)		376.9
Total Sales	$	1,115.3	18.4		$	941.7	(5.8)		$	999.6
Sales by Market Sector
Group Disability and Group Life and AD&D
Core Market (< 2,000 employees)	$	457.5	23.1	%	$	371.5	(1.5)	%	$	377.0
Large Case Market	254.5		26.2		201.6		(17.9)		245.7
Subtotal	712.0		24.2		573.1		(8.0)		622.7
Supplemental and Voluntary	403.3		9.4		368.6		(2.2)		376.9
Total Sales	$	1,115.3	18.4		$	941.7	(5.8)		$	999.6

Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Group sales increased compared to 2021 due to higher sales to new and existing customers in both the large case market and the core market, which we define as employee groups with fewer than 2,000 employees. The sales mix in the group market sector for 2022 was approximately 63 percent core market and 37 percent large case market.

Voluntary benefits sales increased compared to 2021 primarily due to higher sales to existing customers in the core market and higher sales to new customers in the large case market. Individual disability sales, which are primarily concentrated in the multi-life market, increased compared to 2021 due to higher sales to both new and existing customers. Dental and vision sales increased compared to 2021 driven by higher sales to both new and existing customers.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Group sales decreased compared to 2020 due primarily to lower sales to new and existing customers in the large case market and lower sales in our medical stop-loss product, partially offset by higher sales to existing customers in the core market. The sales mix in the group market sector for 2021 was approximately 65 percent core market and 35 percent large case market.

Voluntary benefits sales decreased compared to 2020, driven by lower new and existing customer sales in the large case market, partially offset by higher sales to new and existing customers in the core market. Individual disability sales increased compared to 2020 due to higher sales to existing customers, partially offset by a decline in sales to new customers. Dental and vision sales decreased slightly compared to 2020 driven by lower sales to new customers, mostly offset by higher sales to existing customers.

As 2021 progressed we saw a decline in the sales disruption caused by COVID-19, which resulted in an increase in sales during the latter half of 2021 for certain of our product lines, particularly in the supplemental and voluntary product lines.

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Goodwill

We had total goodwill of $280.0 million for the Unum US segment at December 31, 2022, none of which is currently believed to be at risk for future impairment.

Segment Outlook

We remain committed to offering consumers a broad set of financial protection benefit products at the worksite. During 2023, we will continue to invest in a unique customer experience defined by simplicity, empathy, and deep industry expertise through the increased utilization of digital capabilities and technology to enhance enrollment, underwriting, the client administration experience, and claims processing. In addition, we will focus on strategically aligned sales through continuing to enhance the connectivity, alignment, and support for brokers and technology partners. With respect to smaller employers, we will continue to provide a comprehensive set of consumer-focused products, enhance our distribution model, and utilize our digital tools to bring industry leading enrollment capabilities and a fully integrated customer experience. Our differentiated offerings and market leading leave management services provide substantial growth opportunities, particularly with larger employers, and stronger persistency in our core products. We believe our active client management, integrated customer experience across our product lines, and strong risk management, will enable us to continue to grow our market over the long-term.

We anticipate increased adjusted operating income growth in 2023 supported by premium growth and improved claim experience. We expect strong full year premium income, partially due to favorable, but normalizing, levels of in-force block growth as a result of wage inflation and an increase in the number of lives covered for our group products, as well as continued strong sales momentum. While we expect our group life claim experience to continue to improve as impacts from COVID-19 lessen, we may also continue to experience claims volatility, particularly in our group disability and group and voluntary life products. Furthermore, we could continue to experience increased expenses as we continue to invest in our people and capabilities, including our leave management services.

The current interest rate environment could continue to positively impact our yields on new investments but could also continue to create further unrealized losses in our current holdings. Our net investment income may continue to be impacted by volatility in miscellaneous investment income.

As part of our discipline in pricing and reserving, we continuously monitor emerging claim trends and interest rates. We will continue to take appropriate pricing actions on new business and renewals that are reflective of the current environment.

We continuously monitor key indicators to assess our risks and adjust our business plans accordingly.

Effective January 1, 2023, we will adopt ASU 2018-12. For further discussion, see “Accounting Developments” contained herein in this Item 7 and Note 1 of the “Notes to the Consolidated Financial Statements” contained herein in Item 8.

71

Unum International Segment

The Unum International segment is comprised of our operations in both the United Kingdom and Poland. Our Unum UK products include insurance for group long-term disability, group life, and supplemental lines of business, which includes dental, individual disability, and critical illness products. Our Unum Poland products include insurance for individual and group life with accident and health riders. Unum International's products are sold primarily through field sales personnel and independent brokers and consultants.

Operating Results

Shown below are financial results and key performance indicators for the Unum International segment.

(in millions of dollars, except ratios)
	Year Ended December 31
	2022		% Change		2021		% Change		2020
Adjusted Operating Revenue
Premium Income
Unum UK
Group Long-term Disability	$	376.9	(6.2)	%	$	401.9	10.1	%	$	364.9
Group Life	138.2		23.1		112.3		3.5		108.5
Supplemental	114.0		1.2		112.6		12.8		99.8
Unum Poland	89.7		(0.6)		90.2		13.3		79.6
Total Premium Income	718.8		0.3		717.0		9.8		652.8
Net Investment Income	170.1		28.2		132.7		26.9		104.6
Other Income	0.9		50.0		0.6		20.0		0.5
Total	889.8		4.6		850.3		12.2		757.9
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	564.8		1.5		556.2		11.0		500.9
Commissions	56.3		4.1		54.1		8.9		49.7
Deferral of Acquisition Costs	(12.0)		(6.3)		(12.8)		5.8		(12.1)
Amortization of Deferred Acquisition Costs	7.6		(5.0)		8.0		8.1		7.4
Other Expenses	146.1		5.0		139.1		2.7		135.4
Total	762.8		2.4		744.6		9.3		681.3
Adjusted Operating Income	$	127.0	20.2		$	105.7	38.0		$	76.6

Foreign Currency Translation

The functional currencies of Unum UK and Unum Poland are the British pound sterling and Polish zloty, respectively. Premium income, net investment income, claims, and expenses are received or paid in the functional currency, and we hold functional currency-denominated assets to support functional currency-denominated policy reserves and liabilities. We translate functional currency-denominated financial statement items into dollars for our consolidated financial reporting. We translate income statement items using an average exchange rate for the reporting period, and we translate balance sheet items using the exchange rate at the end of the period. We report unrealized foreign currency translation gains and losses in accumulated other comprehensive income (loss) in our consolidated balance sheets.

Fluctuations in exchange rates impact Unum International's reported financial results and our consolidated financial results. In periods when the functional currency strengthens relative to the preceding period, translation increases current period results relative to the prior period. In periods when the functional currency weakens, translation decreases current period results relative to the prior period.

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Unum UK Operating Results

Shown below are financial results and key performance indicators for the Unum UK product lines in functional currency.

(in millions of pounds, except ratios)
	Year Ended December 31
	2022			% Change		2021			% Change		2020
Adjusted Operating Revenue
Premium Income
Group Long-term Disability	£	304.6		4.3	%	£	292.0		2.7	%	£	284.2
Group Life	112.3			37.5		81.7			(3.4)		84.6
Supplemental	92.3			12.8		81.8			5.3		77.7
Total Premium Income	509.2			11.8		455.5			2.0		446.5
Net Investment Income	131.9			44.9		91.0			19.7		76.0
Other Income	0.1			—		0.1			—		0.1
Total	641.2			17.3		546.6			4.6		522.6
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	413.2			13.9		362.8			2.9		352.5
Commissions	31.8			10.8		28.7			2.1		28.1
Deferral of Acquisition Costs	(4.2)			(2.3)		(4.3)			2.4		(4.2)
Amortization of Deferred Acquisition Costs	5.0			(2.0)		5.1			(3.8)		5.3
Other Expenses	95.6			16.9		81.8			(5.4)		86.5
Total	541.4			14.2		474.1			1.3		468.2
Adjusted Operating Income	£	99.8		37.7		£	72.5		33.3		£	54.4
Weighted Average Pound/Dollar Exchange Rate	1.222					1.377					1.287
Operating Ratios (% of Premium Income):
Benefit Ratio	81.1		%			79.6		%			78.9		%
Other Expense Ratio	18.8		%			18.0		%			19.4		%
Adjusted Operating Income Ratio	19.6		%			15.9		%			12.2		%
Persistency:
Group Long-term Disability	85.1		%			89.3		%			88.2		%
Group Life	87.9		%			86.5		%			81.8		%
Supplemental	92.8		%			90.9		%			90.7		%

Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Premium income was higher compared to 2021 primarily due to in-force block growth and sales growth in the group life product line.

Net investment income was higher compared to 2021 due to higher investment income from inflation index-linked bonds. Our investments in inflation index-linked bonds support the claim reserves associated with certain group policies that provide for inflation-linked increases in benefits. The change in net investment income attributable to these inflation index-linked bonds is partially offset by a change in the reserves for future claim payments related to the inflation index-linked group long-term disability and group life policies.

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Benefits experience was unfavorable relative to 2021 due to higher inflation-linked experience for our group life and group long-term disability products and higher claims incidence in the supplemental product line and in the group long-term disability product line, partially offset by lower mortality in the group life product line.

Commissions increased relative to 2021 due primarily to in-force block growth. The deferral and amortization of acquisition costs were generally consistent relative to 2021. The other expense ratio was higher relative to 2021 due to an increase in employee-related costs and operational investments in the business.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Premium income was higher compared to 2020 primarily due to growth in the in-force blocks resulting from the impact of rate increases in the group long-term disability product line and higher overall persistency.

Net investment income was higher compared to 2020 due to higher investment income from inflation index-linked bonds and a higher level of invested assets, partially offset by a lower yield on fixed-rate bonds.

Benefits experience was unfavorable relative to 2020 due to higher inflation-linked experience in benefits, higher claims incidence in the group life product line and lower claim resolutions in the group long-term disability product line that resulted from continued disruptions to health services caused by COVID-19, partially offset by lower claims incidence in the group long-term disability product line.

Commissions and the deferral of acquisition costs were slightly higher relative to 2020 due to higher sales and in-force block growth. The amortization of acquisition costs was slightly lower than 2020 due to a decline in the level of the deferred asset. The other expense ratio improved relative to 2020 due to certain expenses in 2020 related to COVID-19 that did not recur and our continued focus on expense management.

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Sales

(in millions of dollars and pounds)
	Year Ended December 31
	2022		% Change		2021		% Change		2020
Unum International Sales by Product
Unum UK
Group Long-term Disability	$	43.3	4.6	%	$	41.4	9.8	%	$	37.7
Group Life	55.5		77.3		31.3		51.9		20.6
Supplemental	17.1		0.6		17.0		(10.1)		18.9
Unum Poland	17.8		10.6		16.1		21.1		13.3
Total Sales	$	133.7	26.4		$	105.8	16.9		$	90.5
Unum International Sales by Market Sector
Unum UK
Group Long-term Disability and Group Life
Core Market (< 500 employees)	$	42.7	2.9	%	$	41.5	14.6	%	$	36.2
Large Case Market	56.1		79.8		31.2		41.2		22.1
Subtotal	98.8		35.9		72.7		24.7		58.3
Supplemental	17.1		0.6		17.0		(10.1)		18.9
Unum Poland	17.8		10.6		16.1		21.1		13.3
Total Sales	$	133.7	26.4		$	105.8	16.9		$	90.5
Unum UK Sales by Product
Group Long-term Disability	£	34.5	15.0	%	£	30.0	1.7	%	£	29.5
Group Life	45.4		99.1		22.8		41.6		16.1
Supplemental	13.5		9.8		12.3		(17.4)		14.9
Total Sales	£	93.4	43.5		£	65.1	7.6		£	60.5
Unum UK Sales by Market Sector
Group Long-term Disability and Group Life
Core Market (< 500 employees)	£	34.4	13.9	%	£	30.2	6.7	%	£	28.3
Large Case Market	45.5		101.3		22.6		30.6		17.3
Subtotal	79.9		51.3		52.8		15.8		45.6
Supplemental	13.5		9.8		12.3		(17.4)		14.9
Total Sales	£	93.4	43.5		£	65.1	7.6		£	60.5

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The following discussion of sales results relates only to our Unum UK product lines and is based on functional currency.

Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Group long-term disability sales increased compared to 2021 driven by higher sales to new customers in the large case market and existing customers in the core market, which we define as employee groups with fewer than 500 employees, partially offset by lower sales to new customers in the core market.

Group life sales increased compared to 2021 driven primarily by higher sales to new customers in both the large case and core markets.

Supplemental sales increased compared to 2021 due primarily to higher sales in the dental product line, partially offset by lower sales in the group critical illness product line.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Group long-term disability sales were generally consistent with 2020, with an increase in sales to existing customers in the large case market mostly offset by lower sales to new customers in the large case market and lower sales to existing customers in the core market.

Group life sales increased in 2021 compared to 2020 due to an increase in sales to new customers in both our core and large case markets and higher sales to existing customers in the large case market, partially offset by lower sales to existing customers in our core market.

Supplemental sales were lower in 2021 compared to 2020 due primarily to a decline in the group critical illness product, partially offset by an increase in dental product sales.

Goodwill

We had total goodwill of $39.9 million for the Unum International segment at December 31, 2022, of which, $35.6 million is attributed to the Unum UK reporting unit and $4.3 million is attributed to the Unum Poland reporting unit. Fair value of our reporting units is estimated using a combination of the income and market approaches and the key assumptions used are projected earnings and discount rate. To the extent that the future profitability of these reporting units deteriorates from current assumptions, the goodwill related to the reporting units could be at risk for impairment.

Segment Outlook

We are committed to driving growth in the Unum International segment and will build on the capabilities that we believe will generate growth and profitability in our businesses over the long term. In 2023, we will focus on scaling our business and broadening our international portfolio. For our Unum UK line of business, achieving growth remains a priority, and we will continue to focus on delivering a best in class health and wellbeing service to improve retention of our key customers and drive growth in small case business. We will also accelerate premium growth by focusing on both the broker experience and customer engagement, while maintaining our disciplined approach to pricing. Within our Unum Poland line of business, we will drive growth by expanding our distribution and the new direct channel. We will also continue to invest in digital capabilities, technology, and product enhancements which we believe will drive sustainable growth over the long term.

In 2023, we expect sales and premium growth to continue, alongside improving claim experience. We recognize that 2022 earnings benefited from inflation linked income that we expect to trend towards a more normalized level in 2023 and could pressure earnings growth. As inflation begins to moderate, we will likely continue to experience higher net investment income and fluctuations in our benefit ratio. We continuously monitor key indicators to assess our risks and adjust our business plans accordingly to respond to external challenges.

Effective January 1, 2023, we will adopt ASU 2018-12. For further discussion, see “Accounting Developments” contained herein in this Item 7 and Note 1 of the “Notes to the Consolidated Financial Statements” contained herein in Item 8.

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Colonial Life Segment

The Colonial Life segment includes insurance for accident, sickness, and disability products, which includes our dental and vision products, life products, and cancer and critical illness products issued primarily by Colonial Life & Accident Insurance Company and marketed to employees, on both a group and an individual basis, at the workplace through an independent contractor agent sales force and brokers.

Operating Results

Shown below are financial results and key performance indicators for the Colonial Life segment.

(in millions of dollars, except ratios)
	Year Ended December 31
	2022			% Change		2021			% Change		2020
Adjusted Operating Revenue
Premium Income
Accident, Sickness, and Disability	$	948.9		(0.5)	%	$	953.3		(2.2)	%	$	975.1
Life	401.1			4.3		384.7			2.2		376.4
Cancer and Critical Illness	352.0			(0.1)		352.2			(2.3)		360.5
Total Premium Income	1,702.0			0.7		1,690.2			(1.3)		1,712.0
Net Investment Income	152.7			(11.2)		172.0			10.5		155.7
Other Income	1.1			10.0		1.0			(9.1)		1.1
Total	1,855.8			(0.4)		1,863.2			(0.3)		1,868.8
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	803.1			(11.8)		910.4			0.4		906.5
Commissions	340.0			6.2		320.1			(4.2)		334.3
Deferral of Acquisition Costs	(271.8)			7.6		(252.6)			(7.3)		(272.6)
Amortization of Deferred Acquisition Costs	288.5			11.3		259.1			0.5		257.7
Other Expenses	321.4			8.2		297.0			(3.4)		307.5
Total	1,481.2			(3.4)		1,534.0			—		1,533.4
Adjusted Operating Income	$	374.6		13.8		$	329.2		(1.8)		$	335.4
Operating Ratios (% of Premium Income):
Benefit Ratio	47.2		%			53.9		%			52.9		%
Other Expense Ratio	18.9		%			17.6		%			18.0		%
Adjusted Operating Income Ratio	22.0		%			19.5		%			19.6		%
Persistency:
Accident, Sickness, and Disability	73.3		%			75.4		%			74.3		%
Life	84.5		%			85.5		%			83.7		%
Cancer and Critical Illness	82.3		%			82.4		%			81.8		%

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Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Premium income was favorable compared to 2021 due to higher prior period sales, particularly in the life product line, partially offset by lower overall persistency. Net investment income was lower in 2022 compared to 2021 due to lower miscellaneous investment income and a decline in the yield on invested assets, partially offset by an increase in the level of invested assets.

Benefits experience was favorable relative to 2021 across all product lines, including the life product line as a result of lessening impacts of COVID-19 on our insured population.

Commissions and the deferral of acquisition costs were higher compared to 2021 due to higher prior period sales. The amortization of deferred acquisition costs was higher compared to 2021 due to a higher level of policy terminations primarily in the accident, sickness, and disability product line. The other expense ratio was higher relative to 2021 due primarily to an increase in operational investments in our business, an increase in employee-related costs, and a decrease in the allowance for expected credit losses during 2021 that did not recur in 2022.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Premium income was lower compared to 2020 due to lower prior period sales, partially offset by favorable persistency. Net investment income was higher in 2021 compared to 2020 due to higher miscellaneous investment income and an increase in the level of invested assets, partially offset by a decline in the yield on invested assets.

Benefits experience was unfavorable relative to 2020 due primarily to unfavorable experience in the life product line resulting from the impacts of COVID-19.

Commissions and the deferral of acquisition costs were lower compared to 2020 due to lower prior period sales. The amortization of deferred acquisition costs was generally consistent with 2020. The other expense ratio improved relative to 2020 due primarily to a decrease in the allowance for expected credit losses and our continued focus on expense management and operating efficiencies.

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Sales

(in millions of dollars)
	Year Ended December 31
	2022		% Change		2021		% Change		2020
Sales by Product
Accident, Sickness, and Disability	$	310.6	4.3	%	$	297.9	13.9	%	$	261.5
Life	121.5		9.5		111.0		25.0		88.8
Cancer and Critical Illness	76.0		7.2		70.9		12.9		62.8
Total Sales	$	508.1	5.9		$	479.8	16.1		$	413.1
Sales by Market Sector
Commercial
Core Market (< 1,000 employees)	$	332.4	6.1	%	$	313.2	17.7	%	$	266.2
Large Case Market	58.1		(15.2)		68.5		19.3		57.4
Subtotal	390.5		2.3		381.7		18.0		323.6
Public Sector	117.6		19.9		98.1		9.6		89.5
Total Sales	$	508.1	5.9		$	479.8	16.1		$	413.1

Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

During 2022, we have seen an increase in sales for each of our product lines relative to 2021. Commercial market sales increased compared to 2021 driven by higher sales to existing customers in the core market, which we define as accounts with fewer than 1,000 employees, partially offset by lower sales to new and existing customers in the large case market. Public sector market sales increased compared to 2021 due to higher sales to both new and existing customers. The number of new accounts decreased 5.2 percent and average new case size increased 4.1 percent in 2022 compared to 2021.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

During 2021, we saw an increase in sales for each of our product lines and market sectors relative to 2020 due to a decline in disruption to our sales processes caused by COVID-19. The number of new accounts increased 13.0 percent and average new case size decreased 3.2 percent in 2021 compared to 2020.

Goodwill

We had goodwill of $27.7 million at December 31, 2022, none of which is currently believed to be at risk for future impairment.

Segment Outlook

We remain committed to providing employees and their families with simple, modern, and personal benefit solutions. During 2023, we will continue to utilize our strong distribution system of independent agents, benefit counselors and broker partnerships. We will also continue to invest in new solutions and digital capabilities to expand our reach and effectiveness, driving growth and improving productivity while enhancing the customer experience. In 2023, we will continue to bring an enhanced engagement and enrollment platform to market enabling deeper connections with employees through the enrollment process as well as maintaining stronger relationships throughout the customer lifecycle. We believe our distribution system, customer service capabilities, digital and virtual tools, and ability to serve all market sizes position us well for future growth.

In 2023, we expect positive adjusted operating income growth with strong sales growth and full year premium income growing from the prior year, but at a rate that is below pre-pandemic levels. We expect stable claim experience in 2023, but could continue to experience some level of claims volatility. While we believe our underlying profitability will remain strong, current economic conditions and increasing competition in the voluntary workplace market are risks to achievement of our business plans. We continuously monitor key indicators to assess our risks and adjust our business plans accordingly.

Effective January 1, 2023, we will adopt ASU 2018-12. For further discussion, see “Accounting Developments” contained herein in this Item 7 and Note 1 of the “Notes to the Consolidated Financial Statements” contained herein in Item 8.

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Closed Block Segment

The Closed Block segment consists of group and individual long-term care and other insurance products no longer actively marketed. We discontinued offering individual long-term care in 2009 and group long-term care in 2012. Other insurance products include individual disability, group pension, individual life and corporate-owned life insurance, reinsurance pools and management operations, and other miscellaneous product lines.

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Operating Results

Shown below are financial results and key performance indicators for the Closed Block segment.

(in millions of dollars, except ratios)
	Year Ended December 31
	2022			% Change		2021			% Change		2020
Adjusted Operating Revenue
Premium Income
Long-term Care	$	697.4		(1.0)	%	$	704.3		5.6	%	$	666.9
All Other	246.9			(15.3)		291.5			(11.0)		327.5
Total Premium Income	944.3			(5.2)		995.8			0.1		994.4
Net Investment Income	1,070.6			(7.6)		1,159.0			(15.4)		1,370.3
Other Income	58.0			(10.9)		65.1			(2.3)		66.6
Total	2,072.9			(6.6)		2,219.9			(8.7)		2,431.3
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	1,627.3			(9.3)		1,793.2			(47.7)		3,426.8
Commissions	75.7			(6.0)		80.5			2.7		78.4
Interest and Debt Expense	—			—		—			N.M.		3.1
Other Expenses	185.8			(8.7)		203.5			28.2		158.7
Total	1,888.8			(9.1)		2,077.2			(43.4)		3,667.0
Income (Loss) Before Income Tax and Net Investment Gains and Losses	184.1			29.0		142.7			(111.5)		(1,235.7)
Long-term Care Reserve Increase	—			N.M.		2.1			(98.6)		151.5
Individual Disability Reserve Increase	—			N.M.		6.4			N.M.		—
Group Pension Reserve Increase	—			N.M.		25.1			43.4		17.5
Impacts from Closed Block Individual Disability Reinsurance Transaction	—			N.M.		139.3			(89.3)		1,305.5
Amortization of the Cost of Reinsurance	63.8			(19.3)		79.1			N.M.		2.6
Adjusted Operating Income	$	247.9		(37.2)		$	394.7		63.5		$	241.4
Interest Adjusted Loss Ratio:
Long-term Care1	82.0		%			77.3		%			68.9		%
Operating Ratios (% of Premium Income):
Other Expense Ratio2	12.9		%			11.9		%			13.6		%
Income (Loss) Ratio	19.5		%			14.3		%			(124.3)		%
Adjusted Operating Income Ratio	26.3		%			39.6		%			24.3		%
Persistency:
Long-term Care	95.7		%			95.6		%			94.8		%
1Excludes the $2.1 million reserve increase for the year ended 2021 related to the assumption update that occurred during the third quarter of 2021. Excludes the $151.5 million reserve increase for the year ended 2020 that occurred during the fourth quarter of 2020.
2Excludes amortization of the cost of reinsurance from the years ended 2022, 2021, and 2020. Also excludes $6.2 million and $21.0 million of transaction costs from 2021 and 2020, respectively, related to the two phases of the Closed Block individual disability reinsurance transaction that occurred during the first quarter of 2021 and the fourth quarter of 2020.
N.M. = not a meaningful percentage

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Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Premium income for long-term care decreased compared to 2021 due to policy terminations, partially offset by rate increases. We continue to file requests with various state insurance departments for premium rate increases on certain of our individual and group long-term care policies which reflect assumptions as of the date of filings.  In states for which a rate increase is submitted and approved, we routinely provide customers options for coverage changes or other approaches that might fit their current financial and insurance needs. Premium income for our "All Other" product line continues to decline as expected due to policy terminations and maturities.

Net investment income was lower relative to 2021 primarily due to lower miscellaneous investment income, partially related to smaller increases in the NAV on our private equity partnerships, and a decline in the yield on invested assets, partially offset by an increase in the level of invested assets.

Other income primarily includes the underlying results and associated net investment income of certain assumed blocks of reinsured business.

The interest adjusted loss ratio for long-term care, excluding the reserve increase related to the assumption update in the third quarter of 2021, was less favorable compared to 2021 driven primarily by higher claim incidence. Also impacting benefits experience for the Closed Block segment in 2021 were the reserve recognition impacts from the second phase of the individual disability reinsurance transaction and the previously discussed reserve increases to group pension and individual disability within our "All Other" product line. See "Executive Summary” contained herein in Item 7 and Note 6 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion on the reserve assumption updates.

We no longer have interest and debt expense due to the December 2020 redemption of the senior secured notes issued by Northwind Holdings, LLC (Northwind Holdings).

The other expense ratio, excluding certain transaction costs incurred and the amortization of cost of reinsurance related to the previously discussed reinsurance transaction, was higher than 2021 due primarily to a decline in the expense allowance related to ceded business within our "All Other" product line. See "Executive Summary" contained herein in Item 7 for discussion on the ceded block of individual disability business.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Premium income for long-term care increased compared to 2020 due to rate increases, partially offset by policy terminations. Premium income for our "All Other" product line continued to decline as expected due to policy terminations and maturities.

Net investment income was lower relative to 2020 primarily due to a decrease in the level of invested assets supporting individual disability within our "All Other" product line resulting from the reinsurance transaction and a decline in the yield on invested assets, partially offset by higher miscellaneous investment income, primarily related to increases in the NAV on our private equity partnerships.

The interest adjusted loss ratio for long-term care, excluding the reserve increases as previously discussed, was less favorable compared to 2020 driven primarily by lower claimant mortality and higher submitted claims, but was favorable compared to our long-term expectations. Also impacting benefits experience for the Closed Block segment in 2021 and 2020 were the reserve recognition impacts from the two phases of the individual disability reinsurance transaction and the previously discussed reserve increases to group pension and individual disability within our "All Other" product line. See "Executive Summary” contained herein in Item 7 and Note 6 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion on the reserve assumption updates and the individual disability reinsurance transaction.

The other expense ratio, excluding certain transaction costs incurred and the amortization of cost of reinsurance related to the previously discussed reinsurance transaction, was lower than 2020 driven by expense allowances related to the reinsurance transaction and our continued focus on expense management and operating efficiencies.

Segment Outlook

We will continue to execute on our well-defined strategy of implementing long-term care premium rate increases, efficient capital management, improved financial analysis, and operational effectiveness. We will continue to explore structural options to enhance financial flexibility. Despite continued anticipated premium rate increases in our long-term care business, we expect overall premium income and adjusted operating revenue to decline over time as these closed blocks of business wind down. We

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will likely experience volatility in net investment income due to fluctuations of miscellaneous investment income, driven by bond calls and the increased allocation towards alternative assets, primarily private equity partnership investments, in the long-term care product line portfolio. We record changes in our share of the net asset value (NAV) of the partnerships in net investment income. We receive financial information related to our investments in partnerships and generally record investment income on a one-quarter lag in accordance with our accounting policy. As these net asset values are volatile and can fluctuate materially with changes in market economic conditions, there may possibly be significant movements up or down in future periods as conditions change. We continuously monitor key indicators to assess our risks and adjust our business plans, including utilization of derivative financial instruments to manage interest rate risk.

Profitability of our long-tailed products is affected by claims experience related to mortality and morbidity, resolutions, investment returns, premium rate increases, and persistency. We believe that the interest adjusted loss ratio for long-term care will be relatively flat over the long term, but may continue to experience quarterly volatility, particularly in the near term as our claim block matures and as we continue the implementation of premium rate increases. Specific to our long-term care line of business, we expect the long term interest adjusted loss ratio to remain consistent with prior guidance, which was in the 85 to 90 percent range with some quarterly volatility. Claim resolution rates, which measure the resolution of claims from recovery, deaths, settlements, and benefit expirations, are very sensitive to operational and external factors and can be volatile. Our claim resolution rate assumption used in determining reserves is our expectation of the resolution rate we will experience over the life of the block of business and will vary from actual experience in any one period. It is possible that variability in any of our reserve assumptions, including, but not limited to, mortality, morbidity, resolutions, premium rate increases, benefit change elections, and persistency, could result in a material impact to our reserves.

As a result of the execution of the reinsurance transaction related to our Closed Block individual disability line of business, we have fully ceded a significant portion of this business. We expect that earnings will continue to be impacted by the amortization of the cost of reinsurance. However, we expect the amortization of the cost of reinsurance to decrease as a result of a lower cost of reinsurance due to our adoption of ASU 2018-12 which is effective January 1, 2023. The cost of reinsurance will continue to be amortized over a period of approximately 25 years, on a declining trajectory generally consistent with the expected run-off pattern of the ceded reserves.

For further discussion of ASU 2018-12, see “Accounting Developments” contained herein in this Item 7 and Note 1 of the “Notes to the Consolidated Financial Statements” contained herein in Item 8.

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Corporate Segment

The Corporate segment includes investment income on corporate assets not specifically allocated to a line of business, interest expense on corporate debt other than non-recourse debt, and certain other corporate income and expenses not allocated to a line of business.

Operating Results

(in millions of dollars)
	Year Ended December 31
	2022		% Change	2021		% Change	2020
Adjusted Operating Revenue
Net Investment Income	$	52.5	88.2%	$	27.9	184.7%	$	9.8
Other Income	4.8		(22.6)	6.2		N.M.	1.1
Total	57.3		68.0	34.1		N.M.	10.9
Interest, Debt, and Other Expenses	221.6		(27.4)	305.3		23.3	247.7
Loss Before Income Tax and Net Investment Gains and Losses	(164.3)		39.4	(271.2)		(14.5)	(236.8)
Impairment Loss on Internal-Use Software	—		N.M.	12.1		N.M.	—
Cost Related to Early Retirement of Debt	—		N.M.	67.3		N.M.	—
Impairment Loss on ROU Asset	—		N.M.	13.9		9.4	12.7
Cost Related to Organizational Design Update	—		—	—		N.M.	23.3
Adjusted Operating Loss	$	(164.3)	7.6	$	(177.9)	11.4	$	(200.8)
N.M. = not a meaningful percentage

Year Ended December 31, 2022 Compared with Year Ended December 31, 2021

Adjusted operating loss, which excludes the items listed above, decreased in 2022 relative to 2021, due primarily to higher net investment income, which resulted from an increase in the yield on invested assets and lower pension expenses, partially offset by an increase in employee-related costs and an increase in interest and debt expenses.

See "Executive Summary” contained herein in this Item 7 and Notes 8, 13, and 15 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion on the impairment loss on internal-use software, costs related to the early retirement of debt, the ROU asset impairments, and the costs related to the organizational design update.

Year Ended December 31, 2021 Compared with Year Ended December 31, 2020

Adjusted operating loss, which excludes the items listed above, decreased in 2021 relative to 2020, due primarily to higher net investment income, which resulted from an increase in the yield on invested assets.

Segment Outlook

We expect to continue to generate excess capital on an annual basis through the statutory earnings in our insurance subsidiaries and believe we are well positioned with flexibility to preserve our capital strength while also returning capital to our shareholders. We may experience volatility in net investment income based on both the composition and level of invested assets that we allocate to our products from period to period.

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Investments

Overview

Our investment portfolio is well diversified by type of investment and industry sector. We have established an investment strategy that we believe will provide for adequate cash flows from operations and allow us to hold our securities through periods where significant decreases in fair value occur. We believe our emphasis on risk management in our investment portfolio has positioned us well and generally reduced the volatility in our results.

We and our insurance subsidiaries each have a formal investment policy that includes overall quality and diversification objectives and establishes asset class, investment rating, single issuer, and derivative limits for the entity. We also have formal enterprise investment guidelines that set forth aggregate limits by asset class and investment rating across all entities. The majority of our investments are in investment-grade publicly traded securities. This ensures the desired liquidity and preserves the capital value of our portfolios. Due to the long-term nature of our insurance liabilities, we are also able to invest in less liquid investments to obtain additional returns within the limits of our investment policy. The asset mix guidelines and limits are reviewed and approved by the risk and finance committee of Unum Group's board of directors as they relate to Unum Group and the enterprise as a whole, and by the boards of directors of our insurance subsidiaries as they relate to the respective entities. We review our policies and guidelines annually, or more frequently if deemed necessary, and recommend adjustments as appropriate.

See "Critical Accounting Estimates" contained herein in this Item 7 for further discussion of our valuation of investments.

Closed Block Individual Disability Reinsurance Transaction

In 2020, as part of the first phase of the Closed Block individual disability reinsurance transaction, we transferred fixed maturity securities of $4,686.8 million on an amortized cost basis and $5,958.4 million on a fair value basis, and we recorded a total realized investment gain from the transfer of these securities, including a related net gain from cash flow hedges of $1,302.3 million. As part of the second phase of the Closed Block individual disability reinsurance transaction entered into in March 2021 with Commonwealth, we transferred fixed maturity securities of $226.8 million on an amortized cost basis and $293.7 million on a fair value basis, and recorded a total realized investment gain from the transfer of these securities, including a related net gain from cash flow hedges, of $67.6 million. Although we transferred a significant portion of our fixed maturity security portfolio as part of this transaction, the overall credit profile of our remaining portfolio has not changed. See "Executive Summary" contained herein in this Item 7 for further information on the reinsurance transaction.

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Fixed Maturity Securities

The fair values and associated unrealized gains and losses of our fixed maturity securities portfolio, by industry classification, are as follows:

Fixed Maturity Securities - By Industry Classification

As of December 31, 2022

(in millions of dollars)
Classification	Fair Value		Net Unrealized Gain (Loss)		Fair Value with Gross Unrealized Loss		Gross Unrealized Loss		Fair Value with Gross Unrealized Gain		Gross Unrealized Gain
Basic Industry	$	2,554.5	$	(212.6)	$	1,975.5	$	245.8	$	579.0	$	33.2
Capital Goods	3,193.6		(224.2)		2,227.7		294.8		965.9		70.6
Communications	2,182.4		(156.6)		1,365.8		236.5		816.6		79.9
Consumer Cyclical	1,402.6		(127.2)		1,146.2		147.3		256.4		20.1
Consumer Non-Cyclical	5,763.3		(537.5)		4,097.5		654.6		1,665.8		117.1
Energy	2,770.0		(72.1)		1,467.1		155.0		1,302.9		82.9
Financial Institutions	3,473.9		(443.7)		3,075.4		464.3		398.5		20.6
Mortgage/Asset-Backed	573.3		(18.8)		386.7		27.0		186.6		8.2
Sovereigns	827.1		(81.0)		337.0		115.9		490.1		34.9
Technology	1,567.5		(177.8)		1,438.5		186.9		129.0		9.1
Transportation	1,620.3		(164.5)		1,269.5		183.1		350.8		18.6
U.S. Government Agencies and Municipalities	3,955.4		(554.4)		2,525.5		661.8		1,429.9		107.4
Public Utilities	4,956.9		(214.0)		2,497.4		355.0		2,459.5		141.0
Total	$	34,840.8	$	(2,984.4)	$	23,809.8	$	3,728.0	$	11,031.0	$	743.6

The following two tables show the length of time our investment-grade and below-investment-grade fixed maturity securities portfolios had been in a gross unrealized loss position as of December 31, 2022 and at the end of the prior four quarters. The relationships of the current fair value to amortized cost are not necessarily indicative of the fair value to amortized cost relationships for the securities throughout the entire time that the securities have been in an unrealized loss position nor are they necessarily indicative of the relationships after December 31, 2022. The increase in the unrealized loss on fixed maturity securities during 2022 was due primarily to an increase in U.S. Treasury rates.

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Unrealized Loss on Investment-Grade Fixed Maturity Securities

Length of Time in Unrealized Loss Position

(in millions of dollars)
	2022								2021
	December 31		September 30		June 30		March 31		December 31
Fair Value < 100% >= 70% of Amortized Cost
<= 90 days	$	63.0	$	523.7	$	514.7	$	491.6	$	29.9
> 90 <= 180 days	316.6		879.0		1,177.1		199.5		29.4
> 180 <= 270 days	614.5		945.4		268.9		109.1		0.7
> 270 days <= 1 year	1,126.6		218.6		147.1		1.1		21.8
> 1 year <= 2 years	484.0		195.0		66.5		67.2		5.1
> 2 years <= 3 years	19.2		2.9		6.5		1.7		—
Sub-total	2,623.9		2,764.6		2,180.8		870.2		86.9
Fair Value < 70% >= 40% of Amortized Cost
<= 90 days	10.6		—		10.3		—		—
> 90 <= 180 days	—		22.3		37.8		3.1		—
> 180 <= 270 days	28.5		564.2		80.6		3.7		—
> 270 days <= 1 year	320.2		427.4		39.4		—		1.5
> 1 year <= 2 years	532.7		176.5		39.8		1.9		—
> 2 years <= 3 years	29.6		18.5		—		—		—
Sub-total	921.6		1,208.9		207.9		8.7		1.5
Total	$	3,545.5	$	3,973.5	$	2,388.7	$	878.9	$	88.4

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Unrealized Loss on Below-Investment-Grade Fixed Maturity Securities

Length of Time in Unrealized Loss Position

(in millions of dollars)
	2022								2021
	December 31		September 30		June 30		March 31		December 31
Fair Value < 100% >= 70% of Amortized Cost
<= 90 days	$	1.8	$	27.1	$	73.4	$	24.8	$	0.8
> 90 <= 180 days	12.6		58.5		92.8		5.9		0.3
> 180 <= 270 days	39.1		103.8		13.5		1.9		—
> 270 days <= 1 year	84.7		15.2		3.3		—		2.2
> 1 year <= 2 years	17.5		3.8		0.2		1.8		2.5
> 2 years <= 3 years	0.5		0.7		1.4		3.7		0.3
> 3 years	2.7		3.4		2.9		7.9		5.6
Sub-total	158.9		212.5		187.5		46.0		11.7
Fair Value < 70% >= 40% of Amortized Cost
> 90 <= 180 days	—		—		6.1		—		—
> 180 <= 270 days	—		5.0		3.4		—		—
> 270 days <= 1 year	7.6		—		1.4		—		—
> 1 year <= 2 years	1.3		—		—		—		—
> 2 years <= 3 years	5.1		6.2		5.4		—		—
> 3 years	9.6		9.9		9.1		—		—
Sub-total	23.6		21.1		25.4		—		—
Total	$	182.5	$	233.6	$	212.9	$	46.0	$	11.7

At December 31, 2022, we held 71 investment-grade fixed maturity securities with a gross unrealized loss of $10.0 million or greater as shown in the chart below.

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Gross Unrealized Losses $10 Million or Greater on Investment-Grade Fixed Maturity Securities
As of December 31, 2022
(in millions of dollars)
Classification	Fair Value		Gross Unrealized Loss		Number of Issuers
Basic Industry	$	231.2	$	(55.5)	4
Capital Goods	273.5		(62.7)		6
Communications	448.9		(104.9)		8
Consumer Cyclical	237.7		(54.6)		4
Consumer Non-Cyclical	816.2		(162.9)		13
Energy	121.9		(27.9)		2
Financial Institutions	858.5		(140.0)		10
Mortgage/Asset-Backed	360.8		(26.1)		1
Sovereigns	310.1		(104.6)		2
Technology	350.6		(75.8)		6
Transportation	287.5		(62.2)		5
U.S. Government Agencies and Municipalities	155.6		(35.3)		3
Public Utilities	431.9		(100.4)		7
Total	$	4,884.4	$	(1,012.9)	71

At December 31, 2022, we held one below investment-grade fixed maturity security with a gross unrealized loss greater than $10.0 million. The security is a pharmaceutical company and had a fair value of $37.7 million and a gross unrealized loss of $12.4 million.

The unrealized losses on investment-grade fixed maturity securities principally relate to changes in interest rates or changes in market or sector credit spreads which occurred subsequent to the acquisition of the securities. Below-investment-grade fixed maturity securities are generally more likely to develop credit concerns than investment-grade securities. At December 31, 2022, the unrealized losses in our below-investment-grade fixed maturity securities were generally due to credit spreads in certain industries or sectors and, to a lesser extent, credit concerns related to specific securities. For each specific security in an unrealized loss position, we believe that there are positive factors which mitigate credit concerns and that the securities for which we have not recorded a credit loss will recover in value. We have the ability and intent to continue to hold these securities to recovery of amortized cost and believe that no credit losses have occurred.

During the third quarter of 2022, we recognized a realized loss of $12.6 million on the sale of securities of a pharmaceutical company that was impacted by an adverse ruling surrounding a patent held for its largest drug. We had no other individual investment losses of $10.0 million or greater from credit losses or sales of fixed maturity securities during the years ended December 31, 2022 or 2021.

During the first quarter of 2020, we recognized the following credit losses greater than $10 million:

•$20.8 million on fixed maturity securities issued by an oil and gas producer. The profitability of the company was impacted by the decline in oil prices which, given the environment at the time, may have made near term debt maturities difficult to refinance. We changed our intent to hold this security in the second quarter of 2020 and recognized a $1.4 million loss on the sale of the security in addition to the credit loss previously recorded.

•$17.1 million on fixed maturity securities issued by an oil and gas producer. The profitability of the company was impacted by the decline in oil prices and the company had a high level of debt. The company filed for bankruptcy as expected in early April 2020. We changed our intent to hold this security in the third quarter of 2020 and recognized a $1.0 million loss on the sale of the security in addition to the credit loss previously recorded.

•$10.2 million on fixed maturity securities issued by a paper company whose sales of lumber and other products were impacted by the slowdown in the economy. As a result of an improvement in lumber and other products, during the

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fourth quarter of 2020, we reversed the remainder of the allowance for credit losses that we had recognized in the previous quarters of 2020.

During the remainder of 2020, we did not experience any credit losses exceeding $10 million. We had no individual net investment losses of $10.0 million or greater from sales of fixed maturity securities in 2020.

As of December 31, 2022, the amortized cost net of allowance for credit losses and fair value of our below-investment-grade fixed maturity securities was $2,163.3 million and $1,989.8 million, respectively, and our below-investment-grade fixed maturity securities as a percentage of our total investment portfolio decreased from 5.8 percent at December 31, 2021 to 4.6 percent at December 31, 2022 on a fair value basis. Below-investment-grade securities are inherently riskier than investment-grade securities since the risk of default by the issuer, by definition and as exhibited by bond rating, is higher. Also, the secondary market for certain below-investment-grade issues can be highly illiquid. Additional downgrades may occur, but we do not anticipate any liquidity problems resulting from our investments in below-investment-grade securities, nor do we expect these investments to adversely affect our ability to hold our other investments to maturity.

Fixed Maturity Securities - Foreign Exposure

Our investments in issuers in foreign countries are chosen for specific portfolio management purposes, including asset and liability management and portfolio diversification across geographic lines and sectors to minimize non-market risks. In our approach to investing in fixed maturity securities, specific investments within foreign countries and industry sectors are evaluated for their market position and specific strengths and potential weaknesses. For each security, we consider the political, legal, and financial environment of the sovereign entity in which an issuer is domiciled and operates. The country of domicile is based on consideration of the issuer's headquarters, in addition to location of the assets and the country in which the majority of sales and earnings are derived. We do not have exposure to foreign currency risk, as the cash flows from these investments are either denominated in currencies or hedged into currencies to match the related liabilities. We continually evaluate our foreign investment risk exposure.

Mortgage Loans

The carrying value of our mortgage loan portfolio was $2,435.4 million and $2,560.4 million at December 31, 2022 and 2021, respectively. Our investments in mortgage loans are carried at amortized cost less an allowance for credit losses which was $9.3 million and $8.3 million at December 31, 2022 and 2021, respectively. Our mortgage loan portfolio is comprised entirely of commercial mortgage loans. Our mortgage loan portfolio is well diversified geographically and among property types. Due to conservative underwriting, the incidence of problem mortgage loans and foreclosure activity continues to be low. We held no impaired mortgage loans at December 31, 2022 or 2021. See Notes 1 and 3 in the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of our mortgage loan portfolio and the allowance for expected credit losses.

Private Equity Partnerships

The carrying value of our investments in private equity partnerships was $1,194.3 million and $978.6 million at December 31, 2022 and 2021, respectively. These partnerships are passive in nature and represent funds that are primarily invested in private credit, private equity, and real assets. The carrying value of the partnerships is based on our share of the partnership's NAV and changes in the carrying value are recorded as a component of net investment income. We receive financial information related to our investments in partnerships and generally record investment income on a one-quarter lag in accordance with our accounting policy. We recorded net investment income totaling $110.1 million, $165.4 million, and $19.8 million for the years ended December 31, 2022, 2021, and 2020, respectively. The majority of our investments in partnerships are not redeemable. Distributions received from the funds arise from income generated by the underlying investments as well as the liquidation of the underlying investments. There is generally not a public market for these investments. We had $776.9 million of commitments for additional investments in the partnerships at December 31, 2022 which may or may not be funded. See Note 2 in the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of our private equity partnerships.

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Derivative Financial Instruments

We use derivative financial instruments primarily to manage reinvestment, duration, foreign currency, credit, and equity risks. Historically, we have utilized current and forward-starting interest rate swaps, options on forward-starting interest rate swaps and U.S. Treasury rates, current and forward-starting currency swaps, forward treasury locks, currency forward contracts, forward contracts on specific fixed income securities, credit default swaps, and total return swaps. During 2022, we entered into $779.0 million of notional forward U.S. Treasury interest rate locks in our long-term care product line to manage our reinvestment risk. Credit exposure on derivatives is limited to the value of those contracts in a net gain position, including accrued interest receivable less collateral held. Our credit exposure on derivatives was $1.7 million at December 31, 2022. The carrying value of cash collateral received from our counterparties was $49.4 million at December 31, 2022. The carrying value of fixed maturity securities and cash collateral posted to our counterparties was $39.6 million and $5.1 million at December 31, 2022, respectively. We believe that our credit risk is mitigated by our use of multiple counterparties, all of which have an investment-grade credit rating, and by our use of cross-collateralization agreements.

Other

We did not have exposure to non-current investments, defined as invested assets which are delinquent as to interest and/or principal payments at December 31, 2022. At December 31, 2021 our exposure to non-current investments totaled $19.8 million on a fair value basis.

See Notes 3 and 4 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of our investments and our derivative financial instruments.

Liquidity and Capital Resources

Overview

Our liquidity requirements are met primarily by cash flows provided from operations, principally in our insurance subsidiaries. Premium and investment income, as well as maturities and sales of invested assets, provide the primary sources of cash. Debt and/or securities offerings provide additional sources of liquidity. Cash is applied to the payment of policy benefits, costs of acquiring new business (principally commissions), operating expenses, and taxes, as well as purchases of new investments.

We have established an investment strategy that we believe will provide for adequate cash flows from operations. We attempt to match our asset cash flows and durations with expected liability cash flows and durations to meet the funding requirements of our business. However, deterioration in the credit market may delay our ability to sell our positions in certain of our fixed maturity securities in a timely manner and adversely impact the price we receive for such securities, which may negatively impact our cash flows. Furthermore, if we experience defaults on securities held in the investment portfolios of our insurance subsidiaries, this will negatively impact statutory capital, which could reduce our insurance subsidiaries' capacity to pay dividends to our holding companies. A reduction in dividends to our holding companies could force us to seek external financing to avoid impairing our ability to pay dividends to our stockholders or meet our debt and other payment obligations.

Our policy benefits are primarily in the form of claim payments, and we have minimal exposure to the policy withdrawal risk associated with deposit products such as individual life policies or annuities. A decrease in demand for our insurance products or an increase in the incidence of new claims or the duration of existing claims could negatively impact our cash flows from operations. However, our historical pattern of benefits paid to revenues is generally consistent, even during cycles of economic downturns, which serves to minimize liquidity risk.

The liquidity requirements of the holding company Unum Group include common stock dividends, interest and debt service, and ongoing investments in our businesses.  Unum Group's liquidity requirements are met by assets held by Unum Group and our intermediate holding companies, dividends from primarily our insurance subsidiaries, and issuance of common stock, debt, or other capital securities and borrowings from our existing credit facility, as needed.  As of December 31, 2022, Unum Group and our intermediate holding companies had available holding company liquidity of $1,571 million that was held primarily in bank deposits, commercial paper, money market funds, corporate bonds, municipal bonds, and asset backed securities. No significant restrictions exist on our ability to use or access funds in any of our U.S. or foreign intermediate holding companies. Dividends repatriated from our foreign subsidiaries are eligible for 100 percent exemption from U.S. income tax but may be subject to withholding tax and/or tax on foreign currency gain or loss.

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As part of our capital deployment strategy, we may repurchase shares of Unum Group's common stock, as authorized by our board of directors. In December 2022, our board of directors authorized the repurchase of up to $200.0 million of Unum Group's outstanding common stock beginning on January 1, 2023 through December 31, 2023, with the timing and amount of repurchase activity to be based on market conditions and other considerations, including the level of available cash, alternative uses for cash, and our stock price. In February 2023, our board of directors authorized an increase to the share repurchase program such that we are now authorized to repurchase up to $250.0 million of Unum Group's outstanding common stock. Our previous share repurchase program, which was authorized in October 2021, allowed for the repurchase of up to $250.0 million of Unum Group's outstanding common stock and expired on December 31, 2022 at which time there were no remaining amounts available to be repurchased under the program. In February 2022, we entered into an accelerated share repurchase agreement with a financial counterparty to repurchase $50.0 million of Unum Group's common stock in aggregate. As part of this transaction, we paid $50.0 million to the financial counterparty and received an initial delivery of 1.3 million shares of our common stock, which represented approximately 75 percent of the total delivery under the agreement. The final price adjustment settlement, along with the delivery of the remaining shares, occurred in April 2022, resulting in the delivery to us of 0.4 million additional shares. In total, we repurchased 1.7 million shares pursuant to the February 2022 accelerated share repurchase agreement. During the year ended December 31, 2022, we also repurchased 4.0 million shares in open market transactions at a cost of $150.1 million. See Note 10 of the "Notes to Consolidated Financial Statements" contained herein in Item 8.

Closed Block Individual Disability Reinsurance Transaction

In December 2020, we completed the first phase of a reinsurance transaction, pursuant to which Provident, Paul Revere, and Unum America, wholly-owned domestic insurance subsidiaries of Unum Group and collectively referred to as "the ceding companies", each entered into separate reinsurance agreements with Commonwealth to reinsure, on a coinsurance basis effective as of July 1, 2020, approximately 75 percent of the Closed Block individual disability insurance business, primarily direct business written by the ceding companies. In March 2021, we completed the second phase of the reinsurance transaction, pursuant to which the ceding companies and Commonwealth amended and restated their respective reinsurance agreements to reinsure on a coinsurance and modified coinsurance basis effective as of January 1, 2021, a substantial portion of the remaining Closed Block individual disability business that was not ceded in December 2020, primarily business previously assumed by the ceding companies. Commonwealth established and will maintain collateralized trust accounts for the benefit of the ceding companies to secure its obligations under the reinsurance agreements.

In connection with the first phase of the reinsurance transaction which occurred in December 2020, the ceding companies paid a total ceding commission to Commonwealth of $437.7 million. In connection with the second phase of the reinsurance transaction which occurred in March 2021, Commonwealth paid a ceding commission to the ceding companies of $18.2 million. The ceding companies transferred assets, which consisted primarily of cash and fixed maturity securities, of $6,669.8 million and $767.0 million for the first phase in December 2020 and the second phase in March 2021, respectively. We released approximately $400 million of capital during the fourth quarter of 2020 as a result of the closing of the first phase of the transaction. We released approximately $200 million of capital during the first quarter of 2021 as a result of the closing of the second phase of the transaction.

See "Reinsurance" contained herein in Item 1; "Segment Results" and "Executive Summary" contained herein in Item 7, and Notes 12 and 16 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion on the impacts related to this reinsurance transaction.

Cash Available from Subsidiaries

Unum Group and certain of its intermediate holding company subsidiaries depend on payments from subsidiaries to pay dividends to stockholders, to pay debt obligations, and/or to pay expenses. These payments by our insurance and non-insurance subsidiaries may take the form of dividends, operating and investment management fees, and/or interest payments on loans from the parent to a subsidiary.

Restrictions under applicable state insurance laws limit the amount of dividends that can be paid to a parent company from its insurance subsidiaries in any 12-month period without prior approval by regulatory authorities. For life insurance companies domiciled in the U.S., that limitation generally equals, depending on the state of domicile, either ten percent of an insurer's statutory surplus with respect to policyholders as of the preceding year end or the statutory net gain from operations, excluding realized capital gains and losses, of the preceding year. The payment of dividends to a parent company from a life insurance subsidiary is generally further limited to the amount of unassigned funds.

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In connection with a financial examination of Unum America, which closed at the end of the second quarter of 2020, the Maine Bureau of Insurance (MBOI) concluded that Unum America’s long-term care statutory reserves were deficient by $2,100.0 million as of December 31, 2018, the financial statement date of the examination period. The amount reserves are deficient may increase or decrease over time based on changes in assumed reinvestment rates, policyholder inventories, rate increase activity, and the underlying growth in the locked in statutory reserve basis as well as updates to other long term actuarial assumptions. The MBOI granted permission to Unum America on May 1, 2020, to phase in the additional statutory reserves over seven years beginning with year-end 2020 and ending with year-end 2026. Additional information regarding the Unum America premium deficiency reserve (PDR) is as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Premium Deficiency Reserve
Gross Premium Deficiency Reserve1	$	2,851.0	$	2,977.0	$	2,290.0
Cumulative Gross Premium Deficiency Reserve Recognized	1,191.0		667.0		229.0
Remaining Premium Deficiency Reserve to be Recognized	$	1,660.0	$	2,310.0	$	2,061.0
1The gross PDR decreased by $126.0 million due primarily to premium rate increase activity and underlying growth in the locked-in statutory reserve basis during 2022. The gross PDR increased by $687.0 million and $190.0 million during 2021 and 2020, respectively, due primarily to changes in the assumed reinvestment rate. The increase for 2020 was from the original $2,100.0 million reserve deficiency as of December 31, 2018.

The phase in amounts for 2022, 2021, and 2020 were funded using cash flows from operations and capital contributions from Unum Group. This strengthening is incorporated by using explicitly agreed upon margins into our existing assumptions for annual statutory reserve adequacy testing. These actions add margin to Unum America's best estimate assumptions. Our long-term care reserves and financial results reported under generally accepted accounting principles are not affected by the MBOI’s examination conclusion. We plan to fund the additional statutory reserves with expected cash flows and capital contributions from Unum Group.

Unum America cedes blocks of business, including the long-term care block, to Fairwind Insurance Company (Fairwind), which is an affiliated captive reinsurance subsidiary domiciled in the United States. The ability of Fairwind to pay dividends to Unum Group will depend on its satisfaction of applicable regulatory requirements and on the performance of the business reinsured by Fairwind. Fairwind did not pay dividends in 2022 nor do we anticipate that Fairwind will pay dividends in 2023. During 2022, Unum Group made $515.1 million in capital contributions to Fairwind.

The ability of Unum Group and certain of its intermediate holding company subsidiaries to continue to receive dividends from their insurance subsidiaries also depends on additional factors such as RBC ratios and capital adequacy and/or solvency requirements, funding growth objectives at an affiliate level, and maintaining appropriate capital adequacy ratios to support desired ratings. The RBC ratios for our U.S. insurance subsidiaries at December 31, 2022 are in line with our expectations and are significantly above the level that would require state regulatory action.

Unum Group and/or certain of its intermediate holding company subsidiaries may also receive dividends from our U.K. subsidiaries, the payment of which may be subject to applicable insurance company regulations and capital guidance in the U.K. Unum Limited is subject to the requirements of Solvency II, a European Union (EU) directive that is part of retained UK law pursuant to the European Union (Withdrawal) Act 2018, which prescribes capital requirements and risk management standards for the European insurance industry. Our U.K. holding company is also subject to the Solvency II requirements relevant to insurance holding companies while, together with certain of its subsidiaries including Unum Limited, the group (the Unum UK Solvency II Group) is subject to group supervision under Solvency II. The Unum UK Solvency II Group received approval from the U.K. Prudential Regulation Authority to use its own internal model for calculating regulatory capital and also received approval for certain associated regulatory permissions including transitional relief as the Solvency II capital regime continues to be implemented. In connection with the U.K.’s exit from the EU, the U.K. government is reviewing the regulatory framework of financial services companies which may result in changes to U.K. regulatory capital or U.K. tax regulations. Recent economic conditions have caused volatility in our solvency ratios used to monitor capital adequacy.

The payment of dividends to the parent company from our subsidiaries also requires the approval of the individual subsidiary's board of directors.

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The amount available during 2022 for the payment of ordinary dividends from Unum Group's traditional U.S. insurance subsidiaries, which excludes Fairwind, was approximately $861 million. During 2022, we declared and paid $1,154.0 million in dividends including $1,131.0 paid in cash, of which $477.3 million was considered an extraordinary dividend, and $23.0 million paid in fixed maturity securities. Also during 2022, $39.0 million in cash was paid to Unum Group from one of our traditional U.S. insurance companies as a return of capital. The amount available during 2022 from Unum Limited was approximately £130 million, of which £50.0 million were declared and paid to Unum Group through our U.K holding company, Unum European Holding Company Limited.

During 2023, we intend to maintain a level of capital in our insurance subsidiaries above the applicable capital adequacy requirements and minimum solvency margins. As a result of our consideration of overall capitalization needs, we may not utilize the entire amount of dividends available in 2023, which are based on applicable restrictions under current law. Approximately $991 million is available, without prior approval by regulatory authorities, during 2023 for the payment of dividends from Unum Group's traditional U.S. insurance subsidiaries, which excludes our captive reinsurer. Approximately £80 million is considered distributable from Unum Limited during 2023, subject to local solvency standards and regulatory approval.

Insurance regulatory restrictions do not limit the amount of dividends available for distribution from non-insurance subsidiaries except where the non-insurance subsidiaries are held directly or indirectly by an insurance subsidiary and only indirectly by Unum Group, which does not apply to our current entity structure.

Funding for Employee Benefit Plans

We made contributions of $70.0 million and £4.0 million to our U.S. and U.K. defined contribution plans, respectively, in 2022 and expect to make contributions of approximately $77 million and £5 million during 2023. We had no regulatory contribution requirements for our U.S. qualified defined benefit pension plan in 2022 and made no voluntary contributions in 2022. We do not expect to have regulatory contribution requirements for our U.S. qualified defined benefit pension plan in 2023, but we reserve the right to make voluntarily contributions during 2023. We made no contributions to our U.K. qualified defined benefit pension plan during 2022. We do not expect to have regulatory contribution requirements for our U.K. plan during 2023, but we reserve the right to make voluntarily contributions during 2023. We have met all minimum pension funding requirements set forth by the Employee Retirement Income Security Act. We have estimated our future funding requirements under the Pension Protection Act of 2006 and under applicable U.K. law and do not believe that any future funding requirements will cause a material adverse effect on our liquidity. See Note 9 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of our employee benefit plans.

Debt, Term Loan Facility, Credit Facilities and Other Sources of Liquidity

There are no significant financial covenants associated with any of our outstanding debt obligations.  We continually monitor our debt covenants to ensure we remain in compliance. We have not observed any current trends that would cause a breach of any debt covenants.

Maturities, Purchases, and Retirement of Debt

In September 2022, pursuant to privately negotiated transactions, we purchased, and the Provident Financing Trust I (the Trust) retired, $14.0 million aggregate liquidation amount of the Trust's 7.405% capital securities due 2038, which resulted in the reduction of a corresponding principal amount of our 7.405% junior subordinated debt securities due 2038 then held by the Trust. We incurred costs of $1.2 million related to the early retirement of the junior subordinated debt securities.

In August 2022, we redeemed $350.0 million aggregate principal amount of our 4.000% senior notes due 2024, for which we incurred costs of $3.0 million.

In June 2021, we purchased and retired $500.0 million aggregate principal amount of our 4.500% senior notes due 2025, for which we incurred costs of $67.3 million related to the early retirement of debt.

Northwind Holdings made periodic principal payments on the Northwind notes of $45.0 million in 2020. In December 2020, Northwind Holdings redeemed the remaining $35.0 million of principal on the Northwind notes, and was released of any contractual collateral requirements.

In September 2020, our $400.0 million 5.625% senior unsecured notes matured.

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Issuance of Debt

In June 2021, we issued $600.0 million of 4.125% senior notes due 2051. The notes are callable at or above par and rank equally in the right of payment with all of our other unsecured and unsubordinated debt.

In May 2020, we issued $500.0 million of 4.500% senior notes due 2025, which were subsequently purchased and retired in June

2021 as previously discussed.

Term Loan Facility

In August 2022, we entered into a five-year $350.0 million senior unsecured delayed draw term loan facility with a syndicate of lenders. Also in August 2022 , we drew the entire amount of the term loan facility, which is scheduled to mature in August 2027. Amounts due under the term loan facility incur interest based on the prime rate, the federal funds rate or the Secured Overnight Financing Rate (SOFR). The proceeds from the term loan facility were used to redeem $350.0 million aggregate principal amount of our 4.000% senior notes due 2024.

Borrowings under the term loan facility are subject to financial covenants, negative covenants, and events of default that are customary. The term loan facility includes financial covenants based on our leverage ratio and consolidated net worth.

Credit Facilities

In April 2022, we amended and restated our existing credit agreement providing for a five-year $500.0 million senior unsecured revolving credit facility with a syndicate of lenders. The credit facility, which was previously set to expire in April 2024, was extended through April 2027. We may request that the lenders’ aggregate commitments of $500.0 million under the facility be increased by up to an additional $200.0 million. Certain of our traditional U.S. life insurance subsidiaries, Unum America, Provident, and Colonial Life, joined the agreement and may borrow under the credit facility, and we can elect to add additional insurance subsidiaries to the facility at any later date. Any obligation of a subsidiary under the credit facility is several only and not joint and is subject to an unconditional guarantee by Unum Group. We may also request, on up to two occasions, that the lenders' commitment termination dates be extended by one year. The credit facility also provides for the issuance of letters of credit subject to certain terms and limitations. At December 31, 2022, there were no borrowed amounts outstanding under the credit facility and letters of credit totaling $0.4 million had been issued.

We also have a five-year, £75 million senior unsecured standby letter of credit facility with a different syndicate of lenders, pursuant to which a syndicated letter of credit was issued in favor of Unum Limited (as beneficiary), our U.K. insurance subsidiary, and is available for drawings up to £75 million until its scheduled expiration in July 2026. The credit facility provides for borrowings at an interest rate based on the prime rate or the federal funds rate. No amounts have been drawn on the letter of credit. If drawings are made in the future, we may elect to borrow such amounts from the lenders pursuant to term loans made under the credit facility.

Borrowings under the credit facilities are subject to financial covenants, negative covenants, and events of default that are customary. The two primary financial covenants include limitations based on our leverage ratio and consolidated net worth. We are also subject to covenants that limit subsidiary indebtedness. The credit facilities provide for borrowings at an interest rate based either on the prime rate, federal funds rate, or SOFR.

See Note 8 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for additional information on our debt.

Facility Agreement for Contingent Issuance of Senior Notes

We also have a 20-year facility agreement with a Delaware trust that gives us the right to issue and to sell to the trust, on one or more occasions, up to $400.0 million of 4.046% senior notes in exchange for U.S. Treasury securities held by the trust. These senior notes will not be issued unless and until the issuance right is exercised. The exercise of the issuance right triggers recognition of the senior notes on our consolidated balance sheets. As the amount we receive upon exercise of the issuance right is contingent upon the value of the U.S. Treasury securities, a decline in the value of the U.S. Treasury securities reduces the amount we would receive upon exercise of the issuance right. We may also direct the trust to grant the right to exercise the issuance right with respect to all or a designated amount of the senior notes to one or more assignees (who are our consolidated subsidiaries or persons to whom we have an obligation). We pay a semi-annual facility fee to the trust at a rate of 2.225% per

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year on the unexercised portion of the maximum amount of senior notes that we could issue and sell to the trust and we reimburse the trust for its expenses. For more information, see Note 8 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of this agreement.

Shelf Registration

We filed a shelf registration with the Securities and Exchange Commission in 2020 to issue various types of securities, including common stock, preferred stock, debt securities, depository shares, stock purchase contracts, units and warrants. The shelf registration enables us to raise funds from the offering of any securities covered by the shelf registration as well as any combination thereof, subject to market conditions and our capital needs.

Cash Requirements

As previously discussed, cash is applied primarily to the payment of policy benefits, costs of acquiring new business (principally commissions), operating expenses, and taxes, as well as purchases of investments. We have established an investment strategy that we believe will provide for adequate cash flows from operations to meet cash payment requirements. Summarized below are our estimated material cash requirements, both in the short-term (within 12 months) and the long-term (beyond 12 months) resulting from contractual obligations as of December 31, 2022:

•Policyholder liabilities totaled $46,839.8 million, of which $4,578.3 million is estimated to be paid in 2023. We also maintain reinsurance agreements for which the recoverable under those agreements totaled $13,607.2 million of which $1,211.5 million is estimated to offset related policyholder liability payments in 2023. Policyholder liabilities and the related reinsurance recoverable represent the projected payout of the current in-force policyholder liabilities and the expected cash inflows from reinsurers for liabilities ceded and therefore incorporate uncertainties as to the timing and amount of claim payments. We utilize extensive liability modeling to project future cash flows from the in-force business. The primary assumptions used to project future cash flows are claim incidence rates for mortality and morbidity, claim resolution rates, persistency rates, and interest rates. These cash flows are discounted to determine the current value of the projected claim payments. The timing and amount of payments on policyholder liabilities may vary significantly over time.

•Payments related to our long-term debt and our facility agreement, which include contractual principal and interest payments and therefore exceeds the amount shown in the consolidated balance sheets, totaled $6,714.6 million, of which $193.0 million in interest payments is estimated to be paid in 2023. Payments related to our short-term debt, which include contractual principal and interest payments and therefore exceeds the amount shown in the consolidated balance sheets, totaled $2.1 million.

•Investment commitments which represent commitments we have made to purchase or fund investments including privately placed fixed maturity securities, commercial mortgage loans, and private equity partnerships totaled $841.2 million, all of which is estimated to be paid in 2023 based on the expiration date of the commitments. The timing of the fulfillment of certain of these commitments cannot be estimated, therefore the settlements of these obligations are reflected in amounts estimated to be paid in 2023. These commitments may or may not be funded and are therefore not recorded on our consolidated balance sheets.

•Pensions and OPEB which includes commitments related to our defined benefit pension and postretirement plans for our employees, including our non-qualified pension plan, totaled $688.8 million, of which $18.9 million is estimated to be paid in 2023. Pension plan obligations, other than the non-qualified plan, represent our contributions to the pension plans and are projected based on the expected future minimum contributions as required under current U.S. and U.K. legislative funding requirements. Non-qualified pension plan and other postretirement benefit obligations represent the expected benefit payments related to these plans which we expect to pay, as incurred, from our general assets.

•Amounts owed to reinsurers totaled $574.2 million of which $153.8 million is estimated to be paid in 2023.

•Payables for general operating expenses and deferred compensation liabilities totaled $381.3 million of which $281.5 million is estimated to be paid in 2023.

•Obligations to return advances received from the FHLB and to return unrestricted cash collateral to our securities lending and derivative counterparties totaled $236.9 million of which $199.2 million is estimated to be repaid in 2023.

•Commissions due totaled $125.8 million all of which is estimated to be paid in 2023.

•We also have obligations with outside parties for computer data processing services, software maintenance agreements, and consulting services of $94.9 million, of which $52.0 million is estimated to be paid in 2023.

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•Operating lease payments representing the amount of undiscounted minimum lease payments due totaled $78.5 million of which $18.2 million is estimated to be paid in 2023.

See "Critical Accounting Estimates" contained herein in this Item 7 and Notes 3, 4, 6, 8, 9, 12, and 15 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for additional information on our various commitments and obligations.

Transfers of Financial Assets

Our investment policy permits us to lend fixed maturity securities to unaffiliated financial institutions in short-term securities lending agreements, which increases our investment income with minimal risk. We account for all of our securities lending agreements and repurchase agreements as secured borrowings. As of December 31, 2022, we held $88.5 million of cash collateral from securities lending agreements. The average balance for securities lending agreements which were collateralized by cash during the year ended December 31, 2022 was $95.3 million, and the maximum amount outstanding at any month end was $122.1 million. In addition, at December 31, 2022, we had $69.8 million of off-balance sheet securities lending agreements which were collateralized by securities that we were neither permitted to sell nor control. The average balance of these off-balance sheet transactions during the year ended December 31, 2022 was $160.0 million, and the maximum amount outstanding at any month end was $212.2 million.

To manage our cash position more efficiently, we may enter into securities repurchase agreements with unaffiliated financial institutions. We generally use securities repurchase agreements as a means to finance the purchase of invested assets or for short-term general business purposes until projected cash flows become available from our operations or existing investments. We had no securities repurchase agreements outstanding at December 31, 2022, nor did we utilize any securities repurchase agreements during 2022. Our use of securities repurchase agreements and securities lending agreements can fluctuate during any given period and will depend on our liquidity position, the availability of long-term investments that meet our purchasing criteria, and our general business needs.

Certain of our U.S. insurance subsidiaries are members of regional Federal Home Loan Banks (FHLB). As of December 31, 2022, we owned $17.1 million of FHLB common stock and had outstanding advances of $99.1 million from the regional FHLBs which were used for the purpose of investing in either short-term investments or fixed maturity securities. As of December 31, 2022, we have additional borrowing capacity of approximately $752.7 million from the FHLBs.

See Note 3 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for additional information.

Consolidated Cash Flows

(in millions of dollars)
	Year Ended December 31
	2022		2021		2020
Net Cash Provided by Operating Activities	$	1,418.7	$	1,387.5	$	469.3
Net Cash Used by Investing Activities	(955.9)		(1,340.6)		(267.7)
Net Cash Used by Financing Activities	(418.6)		(168.9)		(88.7)
Net Change in Cash and Bank Deposits	$	44.2	$	(122.0)	$	112.9

Operating Cash Flows

Operating cash flows are primarily attributable to the receipt of premium and investment income, offset by payments of claims, commissions, expenses, and income taxes. Premium income growth is dependent not only on new sales, but on policy renewals and growth of existing business, renewal price increases, and persistency. Investment income growth is dependent on the growth in the underlying assets supporting our insurance reserves and capital and on the earned yield. The level of commissions and operating expenses is attributable to the level of sales and the first year acquisition expenses associated with new business as well as the maintenance of existing business. The level of paid claims is affected partially by the growth and aging of the block of business and also by the general economy, as previously discussed in the operating results by segment.

Included in the change in insurance reserves and liabilities for 2022, 2021, and 2020 were the net reserve changes related to the reserve assumption updates that occurred during the third quarters of 2022 and 2021 and the fourth quarter of 2020. Also

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included in the change in insurance reserves and liabilities and net investment (gain) loss to reconcile net income to net cash provided by operating activities as reported in our consolidated statements of cash flows for 2021 and 2020 were the impacts of the two phases of the Closed Block individual disability reinsurance transaction that occurred during the first quarter of 2021 and the fourth quarter of 2020. Additionally, the operating cash flows for 2021 and 2020 included $456.8 million and $1,087.2 million, respectively, of cash paid to the reinsurer related to the two phases of the Closed Block individual disability reinsurance transaction. See "Executive Summary" contained herein in this Item 7 and Note 6 and 12 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for additional information on the Closed Block individual disability reinsurance transaction and the reserve assumption updates.

Investing Cash Flows

Investing cash inflows consist primarily of the proceeds from the sales and maturities of investments.  Investing cash outflows consist primarily of payments for purchases of investments.  Our investment strategy is to match the cash flows and durations of our assets with the cash flows and durations of our liabilities to meet the funding requirements of our business. When market opportunities arise, we may sell selected securities and reinvest the proceeds to improve the yield and credit quality of our portfolio. We may at times also sell selected securities and reinvest the proceeds to improve the duration matching of our assets and liabilities and/or re-balance our portfolio. As a result, sales before maturity may vary from period to period. The sale and purchase of short-term investments is influenced by proceeds received from FHLB funding advances, issuance of debt, our securities lending program, and by the amount of cash which is at times held in short-term investments to facilitate the availability of cash to fund the purchase of appropriate long-term investments, repay maturing debt, and/or to fund our capital deployment program.

See Note 3 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further information.

Financing Cash Flows

Financing cash flows consist primarily of borrowings and repayments of debt, repurchase of common stock, dividends paid to stockholders, and policyholder account deposits and withdrawals related to our universal life products.

During 2022, we purchased, and the Trust retired, $14.0 million aggregate liquidation amount of our 7.405% capital securities due 2038, for which we paid an additional $1.2 million in cash associated with the early retirement of this debt.

During 2022, we entered into a five-year $350.0 million senior unsecured delayed draw term loan facility with a syndicate of lenders. Also in 2022, we drew the entire amount of the term loan facility, for which we received total proceeds of $349.2 million, and used the proceeds to redeem $350.0 million aggregate principal amount of our 4.000% senior notes due 2024, for which we paid an additional $2.4 million in cash associated with the early retirement of this debt.

During 2021, we issued $600.0 million of 4.125% senior notes due 2051 and received total proceeds of $588.1 million.

Also during 2021, we purchased and retired $500.0 million aggregate principal amount of our 4.500% senior notes due 2025, for which we paid an additional $62.8 million in cash associated with the early retirement of this debt. We had issued the $500.0 million 4.500% senior notes in 2020 and had received total proceeds of $494.1 million.

During 2020, our $400.0 million 5.625% senior unsecured notes matured and we repaid the remaining $80.0 million of principal on our senior secured non-recourse notes issued by Northwind Holdings.

Cash used to repurchase shares of Unum Group's common stock during 2022 and 2021 was $200.1 million and $50.0 million, respectively. There were no share repurchases made during 2020. During 2022, 2021, and 2020 we paid dividends of $254.2 million, $239.4 million, and $231.9 million, respectively, to holders of Unum Group's common stock.

Included in financing cash flows during 2022, 2021, and 2020 was $5.2 million, $40.4 million, and $62.1 million, respectively, of cash received related to the ALR cohort volatility agreement with Commonwealth.

See "Debt, Term Loan Facility, Credit Facilities and Other Sources of Liquidity" contained herein in this Item 7, and Notes 8, 10, and 12 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further information.

Ratings

AM Best, Fitch, Moody's, and S&P are among the third parties that assign issuer credit ratings to Unum Group and financial

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strength ratings to our insurance subsidiaries. We compete based in part on the financial strength ratings provided by rating agencies. A downgrade of our financial strength ratings can be expected to adversely affect us and could potentially, among other things, adversely affect our relationships with distributors of our products and services and retention of our sales force, negatively impact persistency and new sales, particularly large case group sales and individual sales, and generally adversely affect our ability to compete. A downgrade in the issuer credit rating assigned to Unum Group can be expected to adversely affect our cost of capital or our ability to raise additional capital.

The table below reflects the outlook as well as the issuer credit ratings for Unum Group and the financial strength ratings for each of our traditional insurance subsidiaries as of the date of this filing. 

	AM Best	Fitch	Moody's	S&P
Issuer Credit Ratings	bbb	BBB-	Baa3	BBB
Financial Strength Ratings
Provident Life and Accident Insurance Company	A	A-	A3	A
Provident Life and Casualty Insurance Company	A	A-	NR	NR
Unum Life Insurance Company of America	A	A-	A3	A
First Unum Life Insurance Company	A	A-	A3	A
Colonial Life & Accident Insurance Company	A	A-	A3	A
The Paul Revere Life Insurance Company	A	A-	A3	A
Starmount Life Insurance Company	A	NR	NR	NR
Unum Insurance Company	A	A-	A3	NR
Unum Limited	NR	NR	NR	A-
Outlooks
Issuer Credit Rating	Positive	Positive	Stable	Stable
Financial Strength Rating	Stable	Positive	Stable	Stable

NR = not rated

We maintain an ongoing dialogue with the four rating agencies that evaluate us in order to inform them of progress we are making regarding our strategic objectives and financial plans as well as other pertinent issues. A significant component of our communications involves our annual review meeting with each of the four agencies. We hold other meetings throughout the year regarding our business, including, but not limited to, quarterly updates.

In July 2022, AM Best upgraded its financial strength rating on Unum Insurance Company from A- to A, reflecting the strategic importance of this subsidiary to Unum Group and also affirmed its financial strength rating for our other domestic insurance subsidiaries as well as their issuer credit ratings on our senior debt obligations. In addition, AM Best revised the outlook for the long-term issuer credit rating to positive from stable, reflecting strengthening in risk-adjusted capitalization, stable asset quality, adequate reserves, and enhanced liquidity. The AM Best outlook for financial strength rating remains stable.

In December 2022, Fitch revised its outlook to positive from stable primarily reflecting improvements in the balance sheet, as well as earnings metrics that exceeded expectations for the current rating and returned towards pre-pandemic levels.

There have been no other changes in the rating agencies' outlooks or ratings during 2022 or in 2023 prior to the date of this filing.

Agency ratings are not directed toward the holders of our securities and are not recommendations to buy, sell, or hold our securities. Each rating is subject to revision or withdrawal at any time by the assigning rating organization, and each rating should be regarded as an independent assessment, not conditional on any other rating. Given the dynamic nature of the ratings process, changes by these or other rating agencies may or may not occur in the near-term. We have ongoing dialogue with the rating agencies concerning our insurance risk profile, our financial flexibility, our operating performance, and the quality of our investment portfolios. The rating agencies provide specific criteria and, depending on our performance relative to the criteria, will determine future negative or positive rating agency actions.

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See "Ratings" contained herein in Item 1 and "Risk Factors" contained herein in Item 1A for further discussion.

ITEM 7A. QUANTITATIVE AND QUALITATIVE DISCLOSURES ABOUT MARKET RISK

We are subject to various market risk exposures, including interest rate risk and foreign exchange rate risk. The following discussion regarding our risk management activities includes forward-looking statements that involve risk and uncertainties. Estimates of future performance and economic conditions are reflected assuming certain changes in market rates and prices were to occur (sensitivity analysis). Caution should be used in evaluating our overall market risk from the information presented below, as actual results may differ. See "Risk Factors" contained herein in Item 1A, "Investments" contained herein in Item 7, and Notes 2, 3, and 4 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for further discussion of the qualitative aspects of market risk, including derivative financial instrument activity.

Interest Rate Risk

Our exposure to interest rate changes results from our holdings of financial instruments such as fixed rate investments, derivatives, and interest sensitive liabilities. Fixed rate investments include fixed maturity securities, mortgage loans, policy loans, and short-term investments. Fixed maturity securities include U.S. and foreign government bonds, securities issued by government agencies, public utility bonds, corporate bonds, mortgage-backed securities, and redeemable preferred stock, all of which are subject to risk resulting from interest rate fluctuations. Certain of our financial instruments, fixed maturity securities and derivatives, are carried at fair value in our consolidated balance sheets. The fair value of these financial instruments may be adversely affected by changes in interest rates. A rise in interest rates may further increase the net unrealized loss related to these financial instruments, but may improve our ability to earn higher rates of return on new purchases of fixed maturity securities. Conversely, a decline in interest rates may decrease the net unrealized loss, but new securities may be purchased at lower rates of return. Although changes in fair value of fixed maturity securities and derivatives due to changes in interest rates may impact amounts reported in our consolidated balance sheets, these changes will not cause an economic gain or loss unless we sell investments, terminate derivative positions, determine that an investment is impaired, or determine that a derivative instrument is no longer an effective hedge.

Other fixed rate investments, such as policy loans and mortgage loans, are carried at unpaid balances and amortized cost less the allowance for expected credit losses, respectively, rather than fair value in our consolidated balance sheets. These investments may have fair values substantially higher or lower than the carrying values reflected in our balance sheets. A change in interest rates could impact our financial position if we sold our mortgage loan investments at times of low market value. A change in interest rates would not impact our financial position at repayment of policy loans, as ultimately the cash surrender values or death benefits would be reduced for the carrying value of any outstanding policy loans. Carrying amounts for short-term investments approximate fair value, and we believe we have minimal interest rate risk exposure from these investments.

We believe that the risk of being forced to liquidate investments or terminate derivative positions is minimal, primarily due to the level of capital at our insurance subsidiaries, the level of cash and marketable securities at our holding companies, and our investment strategy which we believe provides for adequate cash flows to meet the funding requirements of our business. We may in certain circumstances, however, need to sell investments due to changes in regulatory or capital requirements, changes in tax laws, rating agency decisions, and/or unexpected changes in liquidity needs.

Although our policy benefits are primarily in the form of claim payments and we therefore have minimal exposure to the policy withdrawal risk associated with deposit products such as individual life policies or annuities, the fair values of liabilities under all insurance contracts are taken into consideration in our overall management of interest rate risk, which minimizes exposure to changing interest rates through the matching of investment cash flows with amounts due under insurance contracts. Changes in interest rates and individuals' behavior affect the amount and timing of asset and liability cash flows. We actively monitor our asset and liability cash flow match and our asset and liability duration match to manage interest rate risk. Due to the long duration of our long-term care product, the timing of our investment cash flows do not match those of our maturing liabilities. We model and test asset and liability portfolios to improve interest rate risk management and net yields. Testing the asset and liability portfolios under various interest rate and economic scenarios enables us to choose what we believe to be the most appropriate investment strategy, as well as to limit the risk of disadvantageous outcomes. We use this analysis in determining hedging strategies and utilizing derivative financial instruments. We may use current and forward interest rate swaps, options on forward interest rate swaps, and forward treasury locks to hedge interest rate risks and to match asset durations and cash flows with corresponding liabilities.

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Debt is not carried at fair value in our consolidated balance sheets. If we modify or replace existing debt instruments at current market rates, we may incur a gain or loss on the transaction. We believe our debt-related risk to changes in interest rates is relatively minimal.

We measure our financial instruments' market risk related to changes in interest rates using a sensitivity analysis. This analysis estimates potential changes in fair values as of December 31, 2022 and 2021 based on a hypothetical immediate increase of 100 basis points in interest rates from year end levels. The selection of a 100 basis point immediate parallel change in interest rates should not be construed as our prediction of future market events, but only as an illustration of the potential effect of such an event.

The hypothetical potential changes in fair value of our financial instruments at December 31, 2022 and 2021 are shown as follows:

	December 31, 2022
(in millions of dollars)	Notional Amount of Derivatives		Fair Value		Hypothetical
					FV + 100 BP		Change in FV
Assets
Fixed Maturity Securities 1			$	34,840.8	$	32,158.6	$	(2,682.2)
Mortgage Loans			2,159.5		2,034.3		(125.2)
Policy Loans, Net of Reinsurance Ceded			364.5		339.0		(25.5)
Liabilities
Unrealized Adjustment to Reserves, Net of Reinsurance Ceded and Deferred Acquisition Costs 2			$	559.9	$	1,853.0	$	1,293.1
Long-term Debt			(3,072.0)		(2,681.3)		390.7
Derivatives 1
Swaps	$	935.6	$	58.0	$	55.9	$	(2.1)
Forwards	818.3		(42.9)		(129.7)		(86.8)
Embedded Derivative in Modified Coinsurance Arrangement			(13.9)		(9.5)		4.4

	December 31, 2021
(in millions of dollars)	Notional Amount of Derivatives		Fair Value		Hypothetical
					FV + 100 BP		Change in FV
Assets
Fixed Maturity Securities 1			$	43,336.0	$	39,613.6	$	(3,722.4)
Mortgage Loans			2,677.8		2,510.9		(166.9)
Policy Loans, Net of Reinsurance Ceded			433.4		401.1		(32.3)
Liabilities
Unrealized Adjustment to Reserves, Net of Reinsurance Ceded and Deferred Acquisition Costs 2			$	(4,597.8)	$	(2,526.9)	$	2,070.9
Long-term Debt			(3,879.1)		(3,502.0)		377.1
Derivatives 1
Swaps	$	928.8	$	3.1	$	3.0	$	(0.1)
Forwards	41.7		1.4		1.4		—
Embedded Derivative in Modified Coinsurance Arrangement			(30.1)		(24.4)		5.7

1 These financial instruments are carried at fair value in our consolidated balance sheets. Changes in fair value resulting from changes in interest rates may affect the fair value at which the item is reported in our consolidated balance sheets. The

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corresponding offsetting change is reported in other comprehensive income or loss, net of income tax, except for changes in the fair value of derivatives accounted for as fair value hedges or derivatives not designated as hedging instruments, together with the payment of periodic fees, if applicable, which are recognized in the same income statement line item as the hedged item during the period of change in fair value.

2 The adjustment to reserves and deferred acquisition costs for unrealized investment gains and losses reflects the adjustments to policyholder liabilities and deferred acquisition costs that would be necessary if the unrealized investment gains and losses related to the fixed maturity securities had been realized. Changes in this adjustment are also reported as a component of other comprehensive income or loss, net of income tax. Effective January 1, 2023 we will adopt Accounting Standard Update 2018-12, Targeted Improvements to the Accounting for Long-Duration Contracts (ASU 2018-12), which will significantly change how we value our reserves, and we will no longer record an adjustment to reserves or deferred acquisition costs for unrealized investment gains and losses. See "Accounting Developments" contained herein in Item 7 and Note 1 of the "Notes to the Consolidated Financial Statements" contained herein in Item 8 for further discussion on the impacts upon adoption.

The effect of a change in interest rates on asset prices was determined using a duration implied methodology for the fixed maturity securities whereby the duration of each security was used to estimate the change in price for the security assuming an increase of 100 basis points in interest rates. These hypothetical prices were compared to the actual prices for the period to compute the overall change in market value. The changes in the fair values shown in the chart above for all other items were determined using discounted cash flow analyses. Because we actively manage our investments and liabilities, actual changes could differ from those estimated above.

Although interest rates increased in 2022, long-term interest rates supporting the majority of our lines of business remain below historical norms, which continues to place pressure on our profit margins as we invest cash flows to support our businesses. We estimate that we will have approximately $1.9 billion of investable cash flows in 2023. Assuming interest rates and credit spreads remain constant throughout 2024 at the January 2023 market levels, our net investment income would decrease by an immaterial amount in both 2023 and 2024 as a result of the investment of cash flows at levels below our current portfolio rate. This interest rate scenario does not give consideration to the effect of other factors which could impact these results, such as changes in the bond market and changes in hedging strategies and positions, nor does it consider the potential change to our discount rate reserve assumptions and any mitigating factors such as pricing adjustments. In addition, changes in the interest rate environment, along with other factors, impact the net periodic benefit costs for our pension plans, but we do not believe it would materially affect net income in 2023 or 2024.

See "Critical Accounting Estimates" contained herein in Item 7 for further information concerning our pension and post-retirement benefit plans.

Foreign Currency Risk

The functional currency of our U.K. operations is the British pound sterling. The functional currency of our operations in Poland is the Polish zloty. We are exposed to foreign currency risk arising from fluctuations in the British pound sterling and Polish zloty to U.S. dollar exchange rates primarily as they relate to the translation of the financial results of our U.K. and Polish operations. Fluctuations in exchange rates impact reported financial results. We do not hedge against the possible impact of this risk. Because we do not actually convert our functional currency into dollars except for a limited number of transactions, we view foreign currency translation as a financial reporting issue and not a reflection of operations or profitability in our U.K. or Polish operations.

Assuming the pound to dollar exchange rate decreased 10 percent from the December 31, 2022 and 2021 levels, stockholders' equity as reported in U.S. dollars would have been lower by approximately $59 million and $67 million, respectively. Assuming the pound to dollar average exchange rate decreased 10 percent from the actual average exchange rates for 2022 and 2021, adjusted operating income, as reported in U.S. dollars, would have decreased approximately $12 million and $10 million, respectively. Our Polish operations are currently not a significant portion of our overall operations and any changes in the dollar exchange rate would not represent a material impact to our reported financial results in U.S. dollars.

Dividends paid by Unum Limited are paid to our U.K. holding company. When these funds are repatriated to our U.S. holding company, we are subject to foreign currency risk as the value of the dividend, when converted into U.S. dollars, is dependent upon the foreign exchange rate at the time of conversion.

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We are also exposed to foreign currency risk related to certain foreign investment securities denominated in local currencies. We use foreign currency interest rate swaps to hedge or minimize the foreign exchange risk associated with these instruments.

See "Risk Factors" contained herein in Item 1A and "Consolidated Operating Results" and "Unum International Segment" contained herein in Item 7 for further information concerning foreign currency translation.

Risk Management

Effectively taking and managing risks is essential to the success of our Company. To facilitate this effort, we have a formal Enterprise Risk Management (ERM) program, with a framework comprising the following key components:

•Risk-aware culture and governance

•Risk appetite policy

•Risk identification and prioritization

•Risk and capital modeling

•Risk management activities

•Risk reporting

Our ERM framework is the ongoing system of people, processes, and tools across our Company under which we intend to function consistently and collectively to identify and assess risks and opportunities, to manage all material risks within our risk appetite, and to contribute to strategic decision making. With the goal of maximizing shareholder value, the primary objectives of our ERM framework are to support Unum Group in meeting its operational and financial objectives, maintaining liquidity, optimizing capital, and protecting franchise value.

Risk-Aware Culture and Governance

We employ a risk management model under which risk-based decisions are made daily on a local level. To achieve long-term success, we believe risk management must be the responsibility of all employees. The individual and collective decisions of our employees play a key role in successfully managing our overall risk profile. We strive for a culture of integrity, commitment, and accountability and we believe these values allow our employees to feel comfortable identifying issues as well as taking ownership for addressing potential problems.

Our employees have an obligation to report issues that they believe will have a material financial, reputational, or regulatory impact to the Company. We offer several channels for employees to report their issues or concerns and encourage employees to use the channel that is most appropriate for their situation. We recommend that an employee initially discuss their concerns with their manager; however, if that channel is not appropriate an employee may use any of the other reporting channels available. By employing various approaches, we have established a culture that supports candid discussion and reporting of risks, and empowers our employees to take ownership for risk management.

Our culture is reinforced by our system of risk governance. We employ a multi-layered risk control system. Our lines of defense model is depicted below.

1st Line: Own and Manage	2nd Line: Oversee	3rd Line: Independent Assurance
Business processes and procedures employed throughout the Company through which management assumes and monitors significant risks	Governing bodies chartered with oversight of activities within the 1st and 2nd lines of defense, mitigation of substantial exposures, and management of emerging risks	Independent assurance on the effectiveness of governance, risk management, and internal control performed by internal audit and the board of directors

Business units are primarily responsible for managing their principal risks. Our risk committees and other governing bodies serve as risk and control functions responsible for providing risk oversight, or the second line of risk control. Our internal audit team provides periodic independent reviews and assurance activities serving as our third line of risk control.

In addition, our board has an active role, as a whole and through its committees, in overseeing management of our risks. The board is responsible for the oversight of strategic risk and regularly reviews information regarding our capital, liquidity, and operations, as well as the risks associated with each. The risk and finance committee of the board is responsible for oversight of our risk management process, including financial risk, operational risk, and any other risk not specifically assigned to another board committee. It also is responsible for oversight of risks associated with investments, capital and financing plans and

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activities, and related financial matters, including matters pertaining to our Closed Block segment. The risk and finance committee also oversees risks arising under our information security and business resiliency programs, including cybersecurity, disaster recovery, and business continuity risks, although other committees oversee cyber-related operational risks as necessary to carry out their responsibilities. The audit committee of the board is responsible for oversight of risks relating to financial reporting risk and certain operational risks. The human capital committee of the board is responsible for oversight of risks relating to our compensation plans and programs. The regulatory compliance committee of the board is responsible for oversight of risks related to regulatory, compliance, policy, and legal matters, both current and emerging, and whether of a local, state, federal, or international nature. While each committee is responsible for evaluating certain risks and overseeing the management of such risks, the entire board is regularly informed through committee reports about such risks in addition to the risk information it receives directly.

Our executive risk management committee is responsible for overseeing our enterprise-wide risk management program. The chief risk officer, who is a member of the executive risk management committee, has primary responsibility for our ERM program and is supported by management committees and other governing bodies. These committees are responsible for identifying, measuring, reporting, and managing strategic insurance and operational risks within their respective areas, consistent with enterprise risk management guidance.

Risk Appetite Policy

Our risk appetite policy describes the types of risks we are willing to take, as well as the amount of enterprise risk exposure we deem acceptable in pursuit of our goals, with an objective of clearly defining boundaries for our risk-taking activities.

The starting point of our philosophy and approach to our ERM strategy is our corporate strategy. In contrast to many multi-line peer companies, we do not offer retirement savings, traditional medical benefits, or property and casualty insurance. Our corporate strategy is focused on providing group, individual, and voluntary benefits, either as stand-alone products or combined with other coverages, that create comprehensive benefits solutions for employers. We have market leadership positions in the product lines we offer and believe this combination of focused expertise and experience is a competitive advantage and forms the foundation of our approach to risk management.

We believe our sound and consistent business practices, strong internal compliance program, and comprehensive risk management strategy enable us to operate efficiently and to identify and address potential areas of risk in our business. We take and manage risks to achieve our business and strategic objectives, and our risk appetite statement sets boundaries for risk-taking activities that link earnings, capital, and operational processes, as well as summarizes our most material risk limits and controls. We monitor our risk profile against our established risk tolerance and limits. Risks falling outside our risk tolerance and limits are reported to the applicable governance group, where decisions are made pertaining to acceptance of the risk or implementation of remediation plans or corrective actions as deemed appropriate by that governance group.

Risk Identification and Prioritization

Risk identification and prioritization is an ongoing process, whereby we identify and assess our risk positions and exposures, including notable risk events. Additionally, we identify emerging risks and analyze how material future risks might affect us. Knowing the potential risks we face allows us to monitor and manage their potential effects including adjusting our strategies as appropriate and holding capital levels which provide financial flexibility. Business process owners, supported by the ERM program, have primary responsibility for identifying and prioritizing risks within their respective areas.

We face a wide range of risks, and our continued success depends on our ability to identify and appropriately manage our risk exposures. For additional information on certain risks that may adversely affect our business, operating results, or financial condition see "Cautionary Statement Regarding Forward-Looking Statements" contained herein on page 1 and "Risk Factors" contained herein in Item 1A.

Risk Modeling and Controls

We assess material risks, including how they affect us and how individual risks interrelate, to provide valuable information to management in order that they may effectively manage our risks. We use qualitative and quantitative approaches to assess existing and emerging risks and to develop mitigating strategies to limit our exposure to both.

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We utilize stress testing and scenario analysis for risk management and to shape our business, financial, and strategic planning activities. Both are key components of our risk appetite policy and play an important role in monitoring, assessing, managing, and mitigating our primary risk exposures.

In particular, stress testing of our capital and liquidity management strategies enables us to identify areas of high exposure, assess mitigating actions, develop contingency plans, and guide decisions around our target capital and liquidity levels. For example, we periodically perform stress tests on certain categories of assets or liabilities to support development of capital and liquidity risk contingency plans. These tests help ensure that we have a buffer to support our operations in uncertain times and financial flexibility to respond to market opportunities. Stress testing is also central to reserve adequacy testing, cash flow testing, and asset and liability management.

In addition, we aim to constantly improve our capital modeling techniques and methodologies that are used to determine a level of capital that is commensurate with our risk profile and to ensure compliance with evolving regulatory and rating agency requirements. Our capital modeling reflects appropriate aggregation of risks and diversification benefits resulting from our mix of products and business units.

Our internal capital modeling and allocation aids us in making significant business decisions including strategic planning, capital management, risk limit determination, reinsurance purchases, hedging activities, asset allocation, pricing, and corporate development.

Risk Management Activities

We accept and manage market, credit, insurance, operational and strategic risks in accordance with our corporate strategy, investment policy, and annual business plans. The following fundamental principles are embedded in our risk management efforts across our Company.

•We believe in the benefits of specialization and a focused business strategy. We seek profitable risk-taking in areas where we have established risk management skills and capabilities.

•We seek to manage our exposure to insurance risk through a combination of prudent underwriting with effective risk selection, maintaining pricing discipline, sound reserving practices, claims operational effectiveness, and selective use of reinsurance. Detailed underwriting guidelines and claim policies are tools used to manage our insurance risk exposure. We also monitor exposures against internally prescribed limits, and we diversify to reduce potential concentration risk and volatility.

•We maintain a detailed set of investment policies and guidelines, including fundamental credit analysis, that are used to manage our credit risk exposure and diversify our risks across asset classes and issuers.

•We value the importance of managing cyber-related risks, and have policies and procedures in place to help protect against insider trading and allow for timely disclosure of material cybersecurity events.

•Finally, we foster a risk-aware culture that embeds our corporate values and our code of conduct in our daily operations and preserves our reputation with customers and other key stakeholders. We monitor a composite set of operational risk metrics that measure operating effectiveness from the customer perspective.

Risk Reporting

Regular internal and external risk reporting is an integral part of our ERM framework. Internally, ERM reports are a standard part of our quarterly senior management and board meetings. The reports summarize our existing and emerging risk exposures, as well as report against the tolerances and limits defined by our risk appetite policy.

Externally, we are subject to a number of regulatory and rating agency risk examinations, and risk reports are often included. Annually, we file our Own Risk and Solvency Assessment (ORSA) summary report with the applicable insurance regulators for our U.S. insurance subsidiaries. This report provides strong evidence of the strengths of our ERM framework, measurement approaches, key assumptions utilized in assessing our risks, and prospective solvency assessments under both normal and stressed conditions. See "Regulation" contained herein in Item 1 for additional information regarding the ORSA.

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ITEM 8. FINANCIAL STATEMENTS AND SUPPLEMENTARY DATA

INDEX TO CONSOLIDATED FINANCIAL STATEMENTS

		Page
Report of Independent Registered Public Accounting Firm		107
PCAOB ID:	42
Financial Statements at December 31, 2022 and 2021 and for the Years Ended December 31, 2022, 2021 and 2020:		109
Consolidated Balance Sheets		109
Consolidated Statements of Income		111
Consolidated Statements of Comprehensive Income (Loss)		112
Consolidated Statements of Stockholders' Equity		113
Consolidated Statements of Cash Flows		114
Notes to Consolidated Financial Statements		115
Note 1 - Significant Accounting Policies		115
Note 2 - Fair Values of Financial Instruments		129
Note 3 - Investments		145
Note 4 - Derivative Financial Instruments		158
Note 5 - Accumulated Other Comprehensive Income		167
Note 6 - Liability for Unpaid Claims and Claim Adjustment Expenses		169
Note 7 - Income Tax		172
Note 8 - Debt		176
Note 9 - Employee Benefit Plans		179
Note 10 - Stockholders' Equity and Earnings Per Common Share		188
Note 11 - Stock Based Compensation		190
Note 12 - Reinsurance		194
Note 13 - Segment Information		195
Note 14 - Commitments and Contingent Liabilities		202
Note 15 - Leases		202
Note 16 - Statutory Financial Information		204

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Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Unum Group

Opinion on the Financial Statements

We have audited the accompanying consolidated balance sheets of Unum Group and Subsidiaries (the Company) as of December 31, 2022 and 2021, the related consolidated statements of income, comprehensive income (loss), stockholders' equity and cash flows for each of the three years in the period ended December 31, 2022, and the related notes and financial statement schedules listed in the Index at Item 15(a)(2) (collectively referred to as the "consolidated financial statements").  In our opinion, the consolidated financial statements present fairly, in all material respects, the financial position of the Company at December 31, 2022 and 2021, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 2022, in conformity with U.S. generally accepted accounting principles.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the Company's internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) and our report dated February 23, 2023 expressed an unqualified opinion thereon.

Basis for Opinion

These financial statements are the responsibility of the Company's management.  Our responsibility is to express an opinion on the Company's financial statements based on our audits. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audits in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud. Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. We believe that our audits provide a reasonable basis for our opinion.

Critical Audit Matter

The critical audit matter communicated below is a matter arising from the current period audit of the financial statements that was communicated or required to be communicated to the audit committee and that: (1) relates to accounts or disclosures that are material to the financial statements and (2) involved our especially challenging, subjective, or complex judgments. The communication of the critical audit matter does not alter in any way our opinion on the consolidated financial statements, taken as a whole, and we are not, by communicating the critical audit matter below, providing a separate opinion on the critical audit matter or on the accounts or disclosures to which it relates.

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	Reserves for Long Term Care Policy and Contract Benefits
Description of the Matter	The Company’s reserves for individual and group long-term care policy and contract benefits are $14.0 billion of the $42.3 billion of Reserves for Future Policy and Contract Benefits on the consolidated balance sheet as of December 31, 2022. The two primary categories of long-term care reserves are policy reserves for claims not yet incurred and claim reserves for claims that have been incurred or are estimated to have been incurred but not yet reported. Notes 1 and 6 to the consolidated financial statements describe the accounting for these reserves.
	Policy reserves are established based on a gross premium valuation method to estimate the difference between projected future policy benefits and future premiums utilizing assumptions established as of the most recent loss recognition. Claim reserves are established based on a tabular reserve methodology representing assumptions reflecting the best estimate of the present value of the liability for future claim payments and claim adjustment expenses. Management is required to evaluate its long-term care reserves each period to determine if a reserve deficiency exists. There is significant uncertainty in estimating long-term care reserves given the extended period over which claims are paid and sensitivity of the estimate to assumptions, including morbidity, mortality, claims incidence and resolutions, persistency, interest rates, and future premium rate increases.
	Auditing the long-term care policy and contract benefits reserves was complex due to the highly judgmental nature of the significant assumptions including morbidity, mortality, claims incidence and resolutions, persistency, interest rates and future premium rate increases used in the measurement process. The significant judgment and the sensitivity of the estimate to these assumptions can have a material effect on the valuation of the liability.
How We Addressed the Matter in Our Audit	We obtained an understanding, evaluated the design, and tested the operating effectiveness of the Company’s internal controls over the long-term care reserves process, including controls over the review and approval of assumptions which incorporate the Company’s most recent experience.
	To test long-term care policy and contract benefits liability we performed audit procedures, with the assistance of our actuarial specialists, that included, among others, an evaluation of the methodologies applied by management’s actuarial specialists with those methods used in prior periods. We evaluated the significant assumptions used by management in determining the policy and claims reserves by comparing the significant assumptions, including expected morbidity, mortality, claims incidence and resolutions, persistency, interest rates, and future premium rate increases to historical assumptions, prior actual experience, policyholder experience studies performed by management, available industry information, observable market data, or management’s estimates of prospective changes in these assumptions. In addition, we performed a review of the historical results of the development of the estimate, assessed management’s annual reserve adequacy test, and performed an independent recalculation of policy and contract benefit reserves for a sample of contracts which we compared to the actuarial model used by management.

/s/ Ernst & Young LLP

We have served as the Company’s auditor since 1999.

Chattanooga, Tennessee

February 23, 2023

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CONSOLIDATED BALANCE SHEETS

Unum Group and Subsidiaries

 

	December 31
	2022		2021
	(in millions of dollars)
Assets
Investments
Fixed Maturity Securities - at fair value (amortized cost of $37,825.2; $37,386.7; allowance for credit losses of $—; $—)	$	34,840.8	$	43,336.0
Mortgage Loans (net of allowance for credit losses of $9.3; $8.3)	2,435.4		2,560.4
Policy Loans	3,601.2		3,662.9
Other Long-term Investments	1,440.1		1,203.0
Short-term Investments	1,394.8		1,388.0
Total Investments	43,712.3		52,150.3
Other Assets
Cash and Bank Deposits	119.2		75.0
Accounts and Premiums Receivable (net of allowance for credit losses of $32.5; $34.2)	1,482.1		1,519.9
Reinsurance Recoverable (net of allowance for credit losses of $1.7; $2.3)	10,218.6		10,919.3
Accrued Investment Income	615.0		602.7
Deferred Acquisition Costs	2,252.3		2,207.9
Goodwill	347.6		352.2
Property and Equipment	451.7		462.7
Deferred Income Tax	449.8		—
Other Assets	1,786.3		1,825.6
Total Assets	$	61,434.9	$	70,115.6

 See notes to consolidated financial statements.

109

CONSOLIDATED BALANCE SHEETS - Continued

Unum Group and Subsidiaries

	December 31
	2022		2021
	(in millions of dollars)
Liabilities and Stockholders' Equity
Liabilities
Policy and Contract Benefits	$	1,839.8	$	1,907.7
Reserves for Future Policy and Contract Benefits	42,330.2		48,007.5
Unearned Premiums	352.7		347.5
Other Policyholders’ Funds	1,750.4		1,790.9
Income Tax Payable	190.9		159.1
Deferred Income Tax	9.2		458.4
Short-term Debt	2.0		—
Long-term Debt	3,427.8		3,442.2
Other Liabilities	2,334.4		2,585.9
Total Liabilities	52,237.4		58,699.2
Commitments and Contingent Liabilities - Note 14
Stockholders' Equity
Common Stock, $0.10 par
Authorized: 725,000,000 shares
Issued: 308,306,490 and 307,334,853 shares	30.8		30.7
Additional Paid-in Capital	2,441.0		2,408.1
Accumulated Other Comprehensive Income (Loss)	(2,756.6)		354.1
Retained Earnings	12,912.1		11,853.2
Treasury Stock - at cost:110,551,977 and 104,820,670 shares	(3,429.8)		(3,229.7)
Total Stockholders' Equity	9,197.5		11,416.4
Total Liabilities and Stockholders' Equity	$	61,434.9	$	70,115.6

See notes to consolidated financial statements.

110

CONSOLIDATED STATEMENTS OF INCOME

Unum Group and Subsidiaries

 

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars, except share data)
Revenue
Premium Income	$	9,623.4	$	9,481.0	$	9,378.1
Net Investment Income	2,122.2		2,213.2		2,360.7
Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Other Income	261.1		242.9		224.2
Total Revenue	11,991.0		12,013.8		13,162.1
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	6,936.7		7,598.6		8,972.9
Commissions	1,086.4		1,038.1		1,057.3
Interest and Debt Expense	188.5		185.0		188.2
Cost Related to Early Retirement of Debt	4.2		67.3		—
Deferral of Acquisition Costs	(556.9)		(508.1)		(576.2)
Amortization of Deferred Acquisition Costs	591.0		586.1		606.1
Compensation Expense	1,089.5		975.2		953.2
Other Expenses	1,020.2		1,008.6		996.6
Total Benefits and Expenses	10,359.6		10,950.8		12,198.1
Income Before Income Tax	1,631.4		1,063.0		964.0
Income Tax Expense (Benefit)
Current	473.5		212.8		(116.6)
Deferred	(156.3)		26.0		287.6
Total Income Tax Expense	317.2		238.8		171.0
Net Income	$	1,314.2	$	824.2	$	793.0
Net Income Per Common Share
Basic	$	6.55	$	4.04	$	3.89
Assuming Dilution	$	6.50	$	4.02	$	3.89

See notes to consolidated financial statements.

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CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS)

Unum Group and Subsidiaries

 

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Net Income	$	1,314.2	$	824.2	$	793.0
Other Comprehensive Income (Loss)
Change in Net Unrealized Gain (Loss) on Securities Before Adjustment (net of tax expense (benefit) of $(1,890.8); $(346.9); $250.2)	(7,042.9)		(1,301.4)		983.0
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance (net of tax expense (benefit) of $1,100.8; $316.8; $(138.2))	4,056.9		1,195.9		(531.2)
Change in Net Gain (Loss) on Hedges (net of tax benefit of $19.2; $9.8; $23.8)	(71.4)		(36.0)		(90.0)
Change in Foreign Currency Translation Adjustment (net of tax expense (benefit) of $(0.1); $4.2; $(4.3))	(115.2)		(12.6)		20.3
Change in Unrecognized Pension and Postretirement Benefit Costs (net of tax expense (benefit) of $18.9; $42.1; $(34.8))	61.9		134.0		(45.2)
Total Other Comprehensive Income (Loss)	(3,110.7)		(20.1)		336.9
Comprehensive Income (Loss)	$	(1,796.5)	$	804.1	$	1,129.9

See notes to consolidated financial statements.

112

CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY

Unum Group and Subsidiaries

     

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Common Stock
Balance at Beginning of Year	$	30.7	$	30.7	$	30.6
Common Stock Activity	0.1		—		0.1
Balance at End of Year	30.8		30.7		30.7
Additional Paid-in Capital
Balance at Beginning of Year	2,408.1		2,376.2		2,348.1
Common Stock Activity	32.9		31.9		28.1
Balance at End of Year	2,441.0		2,408.1		2,376.2
Accumulated Other Comprehensive Income (Loss)
Balance at Beginning of Year	354.1		374.2		37.3
Other Comprehensive Income (Loss)	(3,110.7)		(20.1)		336.9
Balance at End of Year	(2,756.6)		354.1		374.2
Retained Earnings
Balance at Beginning of Year	11,853.2		11,269.6		10,728.7
Adjustment to Adopt Accounting Standard Update - Note 1	—		—		(18.9)
Balance at Beginning of Year, as Adjusted	11,853.2		11,269.6		10,709.8
Net Income	1,314.2		824.2		793.0
Dividends to Stockholders (per common share: $1.26; $1.17; $1.14)	(255.3)		(240.6)		(233.2)
Balance at End of Year	12,912.1		11,853.2		11,269.6
Treasury Stock
Balance at Beginning of Year	(3,229.7)		(3,179.7)		(3,179.7)
Purchases of Treasury Stock	(200.1)		(50.0)		—
Balance at End of Year	(3,429.8)		(3,229.7)		(3,179.7)
Total Stockholders' Equity at End of Year	$	9,197.5	$	11,416.4	$	10,871.0

See notes to consolidated financial statements.

113

CONSOLIDATED STATEMENTS OF CASH FLOWS

Unum Group and Subsidiaries

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Cash Flows from Operating Activities
Net Income	$	1,314.2	$	824.2	$	793.0
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Change in Receivables	566.0		678.0		242.9
Change in Deferred Acquisition Costs	34.1		78.0		29.9
Change in Insurance Reserves and Liabilities	(282.0)		74.2		1,481.8
Change in Income Taxes	(58.8)		295.3		(31.3)
Change in Other Accrued Liabilities	(113.9)		11.3		160.1
Non-cash Components of Net Investment Income	(247.0)		(254.7)		(120.5)
Net Investment (Gain) Loss	15.7		(76.7)		(1,199.1)
Depreciation	110.5		119.8		113.6
Cash Related to Reinsurance Transaction	—		(456.8)		(1,087.2)
Amortization of the Cost of Reinsurance	63.8		79.1		2.6
Other, Net	16.1		15.8		83.5
Net Cash Provided by Operating Activities	1,418.7		1,387.5		469.3
Cash Flows from Investing Activities
Proceeds from Sales of Fixed Maturity Securities	559.5		442.5		990.8
Proceeds from Maturities of Fixed Maturity Securities	1,532.5		2,611.4		2,052.4
Proceeds from Sales and Maturities of Other Investments	445.9		403.1		237.0
Purchase of Fixed Maturity Securities	(2,835.3)		(4,106.3)		(3,169.6)
Purchase of Other Investments	(482.9)		(606.8)		(440.6)
Net Sales (Purchases) of Short-term Investments	(22.6)		76.5		(133.1)
Net Increase (Decrease) in Payables for Collateral on Investments	(50.8)		(50.7)		314.5
Net Purchases of Property and Equipment	(102.2)		(110.3)		(119.1)
Net Cash Used by Investing Activities	(955.9)		(1,340.6)		(267.7)
Cash Flows from Financing Activities
Short-term Debt Repayment	—		—		(400.0)
Issuance of Long-term Debt	349.2		588.1		494.1
Long-term Debt Repayment	(364.0)		(500.0)		(80.0)
Cost Related to Early Retirement of Debt	(3.6)		(62.8)		—
Issuance of Common Stock	4.0		3.4		4.4
Repurchase of Common Stock	(200.1)		(50.0)		—
Dividends Paid to Stockholders	(254.2)		(239.4)		(231.9)
Proceeds from Universal Life Policyholder Account Deposits	119.8		128.1		138.4
Payments for Universal Life Policyholder Account Withdrawals	(72.0)		(80.7)		(74.3)
Cash Received Related to Active Life Volatility Cover Agreement	5.2		40.4		62.1
Other, Net	(2.9)		4.0		(1.5)
Net Cash Used by Financing Activities	(418.6)		(168.9)		(88.7)
Net Increase (Decrease) in Cash and Bank Deposits	44.2		(122.0)		112.9
Cash and Bank Deposits at Beginning of Year	75.0		197.0		84.1
Cash and Bank Deposits at End of Year	$	119.2	$	75.0	$	197.0

See notes to consolidated financial statements.

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Note 1 - Significant Accounting Policies

Basis of Presentation: The accompanying consolidated financial statements of Unum Group and its subsidiaries (the Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). Such accounting principles differ from statutory accounting principles (see Note 16). Intercompany transactions have been eliminated.

Description of Business: We are a leading provider of financial protection benefits in the United States, the United Kingdom, and Poland. Our products include disability, life, accident, critical illness, dental and vision, and other related services. We market our products primarily through the workplace.

We have three principal operating business segments: Unum US, Unum International, and Colonial Life. Our other reporting segments are Closed Block and Corporate. See Note 13 for further discussion of our operating segments.

Use of Estimates: The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.

In accordance with standard practice, we regularly review the methodology used in the development of all key estimates. As a result of this review, in 2022, we updated our estimate of the unearned premium reserve for certain of our product lines to utilize a gross unearned premium reserve rather than a net unearned premium reserve. The effect of this change in estimate was to decrease 2022 premium income by $13.4 million and decrease commissions by $1.0 million. This resulted in a decrease to net income of $9.8 million and a decrease to both basic and diluted earnings per share by $0.05.

Fixed Maturity Securities: Fixed maturity securities include long-term bonds and redeemable preferred stocks. Our fixed maturity securities are classified as available-for-sale and reported at fair value. Changes in the fair value of available-for-sale fixed maturity securities, except for amounts related to impairment and credit losses recognized in earnings, are reported as a component of other comprehensive income. These amounts are net of income tax and valuation adjustments to deferred acquisition costs and reserves for future policy and contract benefits which would have been recorded had the related unrealized gain or loss on these securities been realized. Realized investment gains or losses are based upon specific identification of the investments sold.

Interest income is recorded as part of net investment income when earned, using an effective yield method giving effect to amortization of premium and accretion of discount. Included within fixed maturity securities are mortgage-backed and asset-backed securities.  We recognize investment income on these securities using a constant effective yield based on projected prepayments of the underlying loans and the estimated economic life of the securities.  Actual prepayment experience is reviewed periodically, and effective yields are recalculated when differences arise between prepayments originally projected and the actual prepayments received and currently projected.  The effective yield is recalculated on a retrospective basis, and the adjustment is reflected in net investment income. For fixed maturity securities on which collection of investment income is uncertain, we discontinue the accrual of investment income and recognize investment income when interest and dividends are received. Payment terms specified for fixed maturity securities may include a prepayment penalty for unscheduled payoff of the investment.  Prepayment penalties are recognized as investment income when received.

In determining when a decline in fair value below amortized cost of a fixed maturity security is a credit loss, we evaluate available information, both positive and negative, in reaching our conclusions. In particular, we consider the strength of the issuer's balance sheet, its debt obligations and near-term funding requirements, cash flow and liquidity, the profitability of its core businesses, the availability of marketable assets which could be sold to increase liquidity, its industry fundamentals and regulatory environment, and its access to capital markets. Although all available and applicable factors are considered in our analysis, our expectation of recovering the entire amortized cost basis of the security, whether we intend to sell the security, whether it is more likely than not that we will be required to sell the security before recovery of its amortized cost, and whether the security is current on principal and interest payments are the most critical factors in determining whether impairments represent credit losses. The significance of the decline in value is also an important factor, but we generally do not record an impairment loss based solely on this factor, since often other more relevant factors will impact our evaluation of a security.

For securities with a decline in fair value below amortized cost which we intend to sell or more likely than not will be required to sell before recovery in value, the amortized cost of the investment is written down to fair value through earnings, and an impairment loss is recognized in the current period. For securities that we believe are impaired and which we do not intend to

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sell and it is not more likely than not that we will be required to sell before recovery in value, we calculate an allowance for credit losses recognized in earnings which generally represents the difference between the amortized cost of the security and the present value of our best estimate of cash flows expected to be collected, discounted using the effective interest rate implicit in the security at the date of acquisition and limited by the difference between amortized cost and fair value of the security. For fixed maturity securities for which we have recognized an allowance for credit loss through earnings, if through subsequent evaluation there is a significant increase in expected cash flows, the allowance is reduced and is recognized as a reduction to credit losses in the current period. When an allowance for credit losses on a fixed maturity security is recognized, we designate non-accrual status for those securities.  We reverse all previously accrued interest through interest income and use a cash basis method for recognizing any future payments received. See Notes 2 and 3.

Mortgage Loans: Mortgage loans are generally held for investment and are carried at amortized cost less an allowance for expected credit losses. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. Prepayment penalties are recognized as investment income when received. For mortgage loans on which collection of interest income is uncertain, we discontinue the accrual of interest and recognize it in the period when an interest payment is received. We typically do not resume the accrual of interest on mortgage loans on nonaccrual status until there are significant improvements in the underlying financial condition of the borrower. We consider a loan to be delinquent if full payment is not received in accordance with the contractual terms of the loan.

We evaluate each of our mortgage loans individually for impairment and assign an internal credit quality rating based on a comprehensive rating system used to evaluate the credit risk of the loan. Although all available and applicable factors are considered in our analysis, loan-to-value and debt service coverage ratios are the most critical factors in determining impairment. We estimate an allowance for credit losses that we expect to incur over the life of our mortgage loans using a probability of default method. For each loan, we estimate the probability that the loan will default before its maturity (probability of default) and the amount of the loss if the loan defaults (loss given default). These two factors result in an expected loss percentage that is applied to the amortized cost of each loan to determine the expected credit loss. As we are the original underwriter of the mortgage loans, the amortized cost generally equals the principal amount of the loan. We measure losses on defaults of our mortgage loans as the excess amortized cost of the mortgage loan over the fair value of the underlying collateral in the event that we foreclose on the loan or over the expected future cash flows of the loan if we retain the mortgage loan until payoff. We do not purchase mortgage loans with existing credit impairments.

In estimating the probability of default, we consider historical experience, current market conditions, and reasonable and supportable forecasts about the future market conditions. We utilize our historical loan experience in combination with a large third-party industry database for a period of time that aligns with the average life of our loans based on the maturity dates of the loans and prepayment experience. Our model utilizes an industry database of the historical loss experience based on our actual portfolio characteristics such as loan-to-value, debt service coverage, collateral type, geography, and late payment history. In addition, because we actively manage our portfolio, we may extend the term of a loan in certain situations and will accordingly extend the maturity date in the estimate of probability of default. In estimating the loss given default, we primarily consider the type and value of collateral and secondarily the expected liquidation costs and time to recovery.

The primary market factors that we consider in our forecast of future market conditions are gross domestic product, unemployment rates, interest rates, inflation, commercial real estate values, household formation, and retail sales. We also forecast certain loan specific factors such as growth in the fair value and net operating income of collateral by property type. We include our estimate of these factors over a two-year period and for the remainder of the loans’ estimated lives, adjusted for estimated prepayments. Past the two-year forecast period, we revert to the historical assumptions ratably by the end of the fifth year of the loan after which we utilize only historical assumptions.

We utilize various scenarios to estimate our allowance for expected losses ranging from a base case scenario that reflects normal market conditions to a severe case scenario that reflects adverse market conditions. We will adjust our allowance each period to utilize the scenario or weighting of the scenarios that best reflects our view of current market conditions. Additions and reductions to our allowance for credit losses on mortgage loans are reported as a component of net investment gains and losses. See Note 3.

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Note 1 - Significant Accounting Policies - Continued

Policy Loans: Policy loans are presented at the unpaid balances directly related to policyholders. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. Included in policy loans are $3,312.5 million and $3,373.7 million of policy loans ceded to reinsurers at December 31, 2022 and 2021, respectively.

Other Long-term Investments: Other long-term investments are comprised primarily of private equity partnerships, real estate, perpetual preferred stock, common stock, and tax credit partnerships.

Our investments in private equity partnerships are passive in nature and represent funds that are primarily invested in private credit, private equity, and real assets. We account for our investments in these partnerships using either the equity method or at fair value through net income depending on the level of ownership and the degree of our influence over partnership operating and financial policies. For investments in partnerships accounted for under the equity method, we report our investments at our share of the partnership's net asset value (NAV) and record our portion of partnership earnings as a component of net investment income. For investments in partnerships accounted for at fair value through net income, we also report our investments at our share of the partnership's NAV as a practical expedient for fair value with increases or decreases recorded as a component of net investment income. Distributions received from the funds arise from income generated by the underlying investments as well as the liquidation of the underlying investments and there is generally not a public market for these investments.

Investment real estate is primarily comprised of property held for the production of income and property held for sale. Property held for the production of income is carried at cost less accumulated depreciation and any write-downs to fair value for impairment losses. Depreciation is recorded on a straight-line basis over the estimated useful life of the asset. A review for impairment is made whenever events or circumstances indicate that the carrying value may not be recoverable. An impairment loss is recognized when the carrying value of the property exceeds the expected undiscounted cash flows generated from the property, at which point the carrying value is written down to an estimated fair value. Real estate held for sale is carried at the lower of depreciated cost or fair value less estimated selling costs and is not further depreciated once classified as such.

Our perpetual preferred stocks are valued at fair value, based on quoted market prices, where available. For preferred stocks not actively traded, fair values are estimated using values obtained from independent pricing services. Our investments in common stock are valued at fair value. Our shares of Federal Home Loan Bank (FHLB) common stock are carried at cost, which approximates fair value.

Tax credit partnerships in which we have invested were formed for the purpose of investing in the construction and rehabilitation of low-income housing.  Because the partnerships are structured such that there is no return of principal, the primary sources of investment return from our tax credit partnerships are tax credits and tax benefits derived from passive losses on the investments, both of which may exhibit variability over the life of the investment.  These partnerships are accounted for using either the proportional or the effective yield method, depending primarily on whether the tax credits are guaranteed through a letter of credit, a tax indemnity agreement, or another similar arrangement. Tax credits received from these partnerships are reported in our consolidated statements of income as either a reduction of premium tax or a reduction of income tax. The amortization of the principal amount invested in these partnerships is reported as a component of either premium tax or income tax.

See Notes 2 and 3 for further discussion of our other long-term investments.

Short-term Investments: Short-term investments are carried at cost. Short-term investments include investments maturing within one year of purchase, such as corporate commercial paper and Treasury bills, bank term deposits, and other cash accounts and cash equivalents earning interest.

Cash and Bank Deposits: Cash and bank deposits include cash on hand and non-interest bearing cash and deposit accounts.

Derivative Financial Instruments: Derivative financial instruments (including certain derivative instruments embedded in other contracts) are recognized as either other long-term investments or other liabilities in our consolidated balance sheets and are reported at fair value. The accounting for a derivative depends on whether it has been designated and qualifies as part of a hedging relationship, and further, on the type of hedging relationship. To qualify for hedge accounting, at the inception of the hedging transaction, we formally document the risk management objective and strategy for undertaking the hedging transaction, as well as the designation of the hedge as either a fair value hedge or a cash flow hedge. Included in this documentation is how the hedging instrument is expected to hedge the designated risk(s) related to specific assets or liabilities on the balance sheet or

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to specific forecasted transactions as well as a description of the method that will be used to retrospectively and prospectively assess the hedging instrument's effectiveness.

A derivative designated as a hedging instrument must be assessed as being highly effective in offsetting the designated risk(s) of the hedged item. Hedge effectiveness is formally assessed at inception and periodically throughout the life of the designated hedging relationship, using qualitative and quantitative methods. Qualitative methods include comparison of critical terms of the derivative to the hedged item. Quantitative methods include regression or other statistical analysis of changes in fair value or cash flows associated with the hedge relationship.

Changes in the fair value of a derivative designated as a fair value hedge and changes in the fair value of the hedged item attributable to the risk being hedged are recognized in earnings as a component of net investment gain or loss during the period of change in fair value.  For gains or losses on the derivative instrument that are excluded from the assessment of hedge effectiveness, those gains and losses are recognized in other comprehensive income or loss and amortized into earnings in the same income statement line as the related hedged item. The gain or loss on the termination of a fair value hedge is recognized in earnings as a component of net investment gain or loss during the period in which the termination occurs. When interest rate swaps are used in hedge accounting relationships, periodic settlements are recorded in the same income statement line as the related settlements of the hedged items.

Changes in the fair value of a derivative designated as a cash flow hedge are reported in other comprehensive income and reclassified into earnings and reported on the same income statement line item as the hedged item and in the same period or periods during which the hedged item affects earnings. The gain or loss on the termination of an effective cash flow hedge is reported in other comprehensive income and reclassified into earnings and reported on the same income statement line item as the hedged item and in the same period or periods during which the hedged item affects earnings.

Gains or losses on the termination of ineffective fair value or cash flow hedges are reported in earnings as a component of net investment gain or loss. In the event a hedged item is disposed of or the anticipated transaction being hedged is no longer likely to occur, we will terminate the related derivative and recognize the gain or loss on termination in current earnings as a component of net investment gain or loss. In the event a hedged item is disposed of subsequent to the termination of the hedging transaction, we reclassify any remaining gain or loss on the hedge out of accumulated other comprehensive income into earnings as a component of the same income statement line item wherein we report the gain or loss on disposition of the hedged item.

For a derivative not designated as a hedging instrument, changes in the fair value of the derivative, together with the payment of periodic fees, if applicable, are recognized in the same income statement line item as the hedged item during the period of change in fair value.

Cash flow activity from the settlement of derivative contracts is reported in the consolidated statements of cash flows as a component of proceeds from sales and maturities of other investments.

In our consolidated balance sheets, we do not offset fair value amounts recognized for derivatives executed with the same counterparty under a master netting agreement and fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral arising from those master netting agreements. See Notes 2, 3, and 4.

Fair Value Measurement: Certain assets and liabilities are reported at fair value in our consolidated balance sheets and in our notes to our consolidated financial statements. We define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Therefore, fair value represents an exit price, not an entry price. The exit price objective applies regardless of our intent and/or ability to sell the asset or transfer the liability at the measurement date. Assets or liabilities with readily available actively quoted prices or for which fair value can be measured from actively quoted prices in active markets generally have more pricing observability and less judgment utilized in measuring fair value. When actively quoted prices are not available, fair values are based on quoted prices in markets that are not active, quoted prices for similar but not identical assets or liabilities, or other observable inputs. If observable inputs are not available, unobservable inputs and/or adjustments to observable inputs requiring management judgment are used to determine fair value. We categorize our assets and liabilities measured at estimated fair value into a three-level hierarchy, based on the significance of the inputs. The fair value hierarchy gives the highest priority to inputs which are

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Note 1 - Significant Accounting Policies - Continued

unadjusted and represent quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). See Note 2.

Allowance for Credit Losses on Premiums Receivable: We establish an allowance for credit losses on premiums receivable, which is deducted from the gross amount of our receivable balance, to present the net amount we expect to collect on this asset. The allowance is forward-looking in nature and is calculated based on considerations regarding both historical events and future expectations. Periodic changes in the allowance are recorded through earnings.

The allowance on our premiums receivable is primarily determined using an aging analysis as well as historical lapse and delinquency rates by line of business, adjusted for key factors that may impact our future expectation of premium receipts such as changes in customer demographics, business practices, economic conditions, and product offerings. We write off premiums receivable amounts when determined to be uncollectible, which is based on various factors, including the aging of premiums receivable past the due date and specific communication with customers. At December 31, 2022 and 2021, the allowance for expected credit losses on premium receivables was $32.5 million and $34.2 million, respectively, on gross premium receivables of $557.6 million and $530.7 million, respectively. The allowance decreased $1.7 million during the year ended December 31, 2022, and was driven primarily by improvements in the age of premiums receivable. The allowance decreased $4.6 million during the year ended December 31, 2021, driven primarily by improvements in the age of premiums receivable and improvements in unemployment levels.

Deferred Acquisition Costs: Incremental direct costs associated with the successful acquisition of new or renewal insurance contracts have been deferred. Such costs include commissions, other agency compensation, certain selection and policy issue expenses, and certain field expenses. Acquisition costs that do not vary with the production of new business, such as commissions on group products which are generally level throughout the life of the policy, are excluded from deferral. Deferred acquisition costs are subject to recoverability testing at the time of policy issue and loss recognition testing in subsequent years.

Deferred acquisition costs related to non-interest sensitive policies are amortized in proportion to the premium income we expect to receive over the lives of the policies. Deferred acquisition costs related to interest sensitive policies are amortized over the lives of the policies in relation to the present value of estimated gross profits from surrender charges, mortality margins, investment returns, and expense margins. Deviations from projections result in a change to the rate of amortization in the period during which such events occur. Generally, the amortization periods for these policies approximate the estimated lives of the policies.

For certain products, policyholders can elect to modify product benefits, features, rights, or coverages by exchanging a contract for a new contract or by amendment, endorsement, or rider to a contract, or by the election of a feature or coverage within a contract. These transactions are known as internal replacement transactions. Internal replacement transactions wherein the modification does not substantially change the policy are accounted for as continuations of the replaced contracts. Unamortized deferred acquisition costs from the original policy continue to be amortized over the expected life of the new policy, and the costs of replacing the policy are accounted for as policy maintenance costs and expensed as incurred. Internal replacement transactions, principally on group contracts, that result in a policy that is substantially changed are accounted for as an extinguishment of the original policy and the issuance of a new policy. Unamortized deferred acquisition costs on the original policy that was replaced are immediately expensed, and the costs of acquiring the new policy are capitalized and amortized in accordance with our accounting policies for deferred acquisition costs.

Loss recognition and recoverability testing is performed on an annual basis, or more frequently if appropriate, using best estimate assumptions as to future experience as of the date of the test. Insurance contracts are grouped for each major product line within a segment when we perform the loss recognition and recoverability tests. If loss recognition or recoverability testing indicates that deferred acquisition costs are not recoverable, the deficiency is charged to expense.

Goodwill: Goodwill is the excess of the amount paid to acquire a business over the fair value of the net assets acquired. We review the carrying amount of goodwill for impairment on an annual basis, or more frequently if events or changes in circumstances indicate that the carrying amount might not be recoverable. Goodwill impairment testing compares the fair value of a reporting unit with its carrying amount, including goodwill.  If the fair value of the reporting unit to which the goodwill relates is less than the carrying amount of the reporting unit, an impairment charge is recognized for the amount by which the

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Note 1 - Significant Accounting Policies - Continued

carrying amount exceeds the fair value of the reporting unit in an amount not to exceed the total amount of goodwill allocated to the reporting unit. 

Property and Equipment: Property and equipment is reported at cost less accumulated depreciation, which is calculated on the straight-line method over the estimated useful life. The accumulated depreciation for property and equipment was $1,328.7 million and $1,259.6 million as of December 31, 2022 and 2021, respectively.

Value of Business Acquired: Value of business acquired represents the present value of future profits recorded in connection with the acquisition of a block of insurance policies. The asset is amortized based upon expected future premium income for non-interest sensitive insurance policies and estimated future gross profits from surrender charges, mortality margins, investment returns, and expense margins for interest sensitive insurance policies. The value of business acquired, which is included in other assets in our consolidated balance sheets, was $62.9 million and $73.1 million at December 31, 2022 and 2021, respectively. The accumulated amortization for value of business acquired was $150.3 million and $157.7 million as of December 31, 2022 and 2021, respectively.

The amortization of value of business acquired, which is included in other expenses in the consolidated statements of income, was $4.9 million, $5.7 million, and $6.1 million for the years ended December 31, 2022, 2021, and 2020, respectively. We periodically review the carrying amount of value of business acquired using the same methods used to evaluate deferred acquisition costs.

Policy and Contract Benefits: Policy and contract benefits represent amounts paid and expected to be paid based on reported losses and estimates of incurred but not reported losses for non-interest sensitive life and accident and health products. For interest sensitive products, benefits are the amounts paid and expected to be paid on insured claims in excess of the policyholders' policy fund balances.

Reserves for Future Policy and Contract Benefits: Policy reserves represent future policy and contract benefits for claims not yet incurred. Policy reserves for non-interest sensitive life and accident and health products are determined using the net level premium method. The reserves are calculated based upon assumptions as to interest, persistency, morbidity, and mortality that were appropriate at the date of issue. Discount rate assumptions are based on actual and expected net investment returns. Persistency assumptions are based on our actual historical experience adjusted for future expectations. Claim incidence and claim resolution rate assumptions related to morbidity and mortality are based on actual experience or industry standards adjusted as appropriate to reflect our actual experience and future expectations. The assumptions vary by plan, year of issue, and policy duration and include a provision for adverse deviation.

Policy reserves for group single premium annuities are developed on a net single premium method. The reserves are calculated based on assumptions as to interest, mortality, and retirement that were appropriate at the date of issue. Mortality assumptions are based upon industry standards adjusted as appropriate to reflect our actual experience and future expectations. The assumptions vary by year of issue.

Policy reserves for interest sensitive products are principally policyholder account values resulting from customer deposits and interest credited less cost of insurance, policy administration expenses, surrender charges, and customer withdrawals.

Policy reserves require ongoing loss recognition testing. We perform loss recognition tests on our policy reserves annually, or more frequently if appropriate, using best estimate assumptions as of the date of the test, without a provision for adverse deviation. We group the policy reserves for each major product line within a segment when we perform the loss recognition tests. If the policy reserves determined using these best estimate assumptions are higher than our existing policy reserves net of any deferred acquisition cost balance, the existing policy reserves are increased or deferred acquisition costs are reduced to immediately recognize the deficiency. This becomes the new basis for policy reserves going forward, subject to future loss recognition testing.

Claim reserves represent future policy and contract benefits for claims that have been incurred or are estimated to have been incurred but not yet reported to us. Our claim reserves relate primarily to disability and long-term care policies and are calculated based on assumptions as to interest and claim resolution rates that are currently appropriate. Claim resolution rate assumptions are based on our actual experience. The interest rate assumptions used for discounting claim reserves are based on

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projected portfolio yield rates, after consideration for defaults and investment expenses, for the assets supporting the liabilities for the various product lines. Unlike policy reserves for which assumptions are generally established and locked in at the time of policy issuance, claim reserves are subject to revision as current claim experience and projections of future factors affecting claim experience change. Claim reserves do not include a provision for adverse deviation. See Note 6.

Other Policyholders' Funds: Other policyholders' funds represent customer deposits plus interest credited at contract rates. We control interest rate risk by investing in quality assets which have an aggregate duration that closely matches the expected duration of life liabilities.

Income Tax: Deferred taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial statement purposes and the amounts used for income tax purposes. Deferred taxes have been measured using enacted statutory income tax rates and laws that are currently in effect. We record adjustments to our deferred taxes resulting from tax rate changes through income as of the date of enactment. We record deferred tax assets for tax positions taken in the U.S. and other tax jurisdictions based on our assessment of whether a position is more likely than not to be sustained upon examination based solely on its technical merits.  A valuation allowance is established for deferred tax assets when it is more likely than not that an amount will not be realized. We record tax expense related to Global Intangible Low-Taxed Income in the period in which it is incurred. We follow an aggregate portfolio approach to release disproportionate tax effects from accumulated other comprehensive income upon disposal of an entire business segment's portfolio. See Note 7.

Short-term and Long-term Debt: Debt is generally carried at the unpaid principal balance, net of unamortized discount or premium and deferred debt issuance costs. Short-term debt consists of debt due within the next twelve months, including that portion of debt otherwise classified as long-term. The amortization of the original issue discount or premium as well as deferred debt issuance costs are recognized as a component of interest expense over the period the debt is expected to be outstanding. The carrying amount of long-term debt that is part of a fair value hedge program includes an adjustment to reflect the effect of the change in fair value attributable to the risk being hedged. Net interest settlements for fair value hedges on our long-term debt are recognized as a component of interest expense. See Note 8.

Right-of-Use Asset (ROU) and Lease Liability: ROU assets represent our right to use an underlying asset for a specified lease term and are included in other assets in our consolidated balance sheet. Lease liabilities represent the present value of lease payments that we are obligated to pay arising from a lease and are included in other liabilities in our consolidated balance sheet.

We determine if an arrangement is a lease at inception through a formal process that evaluates our right to control the use of an identified asset for a period of time in exchange for consideration. We account for the lease and non-lease components of our building leases separately and have elected to use the available practical expedient to account for the lease and non-lease components of our equipment leases as a single component. All of our leases are classified as operating. For each operating lease, we calculate a lease liability at commencement date based on the present value of lease payments over the lease term and a corresponding ROU asset, adjusted for lease incentives. We do not recognize right-of-use assets and lease liabilities that arise from short-term leases for any class of underlying asset.

We consider the likelihood of renewal in determining the lease terms for the calculation of the ROU asset and lease liability. As most of our leases do not provide an implicit rate of interest, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. We use the implicit rate of interest when readily determinable.

Operating lease cost is calculated on a straight-line basis over the lease term and is included in other expenses in our consolidated statements of income. We amortize the ROU asset over the lease term on a pattern determined by the difference between the straight-line lease liability expense and the accretion of the imputed interest calculated on the lease liability. See Note 15.

Treasury Stock and Retirement of Common Stock: Treasury stock is reflected as a reduction of stockholders' equity at cost. When shares are retired, the par value is removed from common stock, and the excess of the repurchase price over par is allocated between additional paid-in capital and retained earnings. See Note 10.

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Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

Revenue Recognition: Our non-interest sensitive life and accident and health products are long-duration contracts, and premium income is recognized as revenue when due from policyholders. If the contracts are experience rated, the estimated ultimate premium is recognized as revenue over the period of the contract. The estimated ultimate premium, which is revised to reflect current experience, is based on estimated claim costs, expenses, and profit margins.

For interest sensitive products, the amounts collected from policyholders are considered deposits, and only the deductions during the period for cost of insurance, policy administration, and surrenders are included in revenue. Policyholders' funds represent funds deposited by contract holders and are not included in revenue.

Fees from our leave management services and administrative-services only (ASO) business are reported as other income when services are rendered.

Reinsurance: We routinely enter into reinsurance agreements with other insurance companies to spread risk and thereby limit losses from large exposures. For each of our reinsurance agreements, we determine if the agreement provides indemnification against loss or liability relating to insurance risk in accordance with applicable accounting standards. If we determine that a reinsurance agreement does not expose the reinsurer to a reasonable possibility of a significant loss from insurance risk, we record the agreement using the deposit method of accounting.

Reinsurance activity is accounted for on a basis consistent with the terms of the reinsurance contracts and the accounting used for the original policies issued. Premium income and benefits and change in reserves for future benefits are presented in our consolidated statements of income net of reinsurance ceded. Ceded liabilities for policy and contract benefits, future policy and contract benefits, and unearned premiums are reported on a gross basis in our consolidated balance sheets, as are ceded policy loans. Our reinsurance recoverable includes the balances due from reinsurers under the terms of the reinsurance agreements for these ceded balances as well as settlement amounts currently due.

Where applicable, gains or costs recognized on reinsurance transactions are generally deferred and amortized into earnings based upon expected future premium income for non-interest sensitive insurance policies and estimated future gross profits for interest sensitive insurance policies. Gains or costs recognized on reinsurance transactions for non-interest sensitive products for which we no longer receive premiums are generally deferred and amortized into earnings based upon expected claim reserve patterns. The cost of reinsurance included in other assets in our consolidated balance sheets at December 31, 2022 and 2021 was $713.3 million and $777.1 million. The deferred gain on reinsurance included in other liabilities in our consolidated balance sheets at December 31, 2022 and 2021 was $3.1 million and $3.7 million, respectively.

Under ceded reinsurance agreements wherein we are not relieved of our legal liability to our policyholders, if the assuming reinsurer is unable to meet its obligations, we remain contingently liable. We evaluate the financial condition of reinsurers and monitor concentration of credit risk to minimize this exposure. We may also require assets in trust, letters of credit, or other acceptable collateral to support our reinsurance recoverable balances. We estimate an allowance for expected credit losses for our reinsurance recoverable balance using a probability of default approach which incorporates key inputs and assumptions regarding market factors, counterparty credit ratings, and collateral received. When calculating our allowance, we apply these market factors to the net amount of our credit exposure, which considers collateral arrangements such as letters of credit and trust accounts. We evaluate the factors used to determine our allowance on a quarterly basis to consider material changes in our assumptions and make adjustments accordingly. At December 31, 2022 and 2021, the allowance for expected credit losses on reinsurance recoverables was $1.7 million and $2.3 million, respectively. The allowance decreased $0.6 million and $9.4 million during the years ended December 31, 2022, and 2021, respectively. The decreases are primarily due to changes in the composition of the related receivable. See Note 12.

Premium Tax Expense: Premium tax expense is included in other expenses in the consolidated statements of income. For the years ended December 31, 2022, 2021, and 2020, premium tax expense was $169.3 million, $166.0 million, and $175.5 million, respectively.

Stock-Based Compensation: The cost of stock-based compensation is generally measured based on the grant-date fair value of the award. The Black-Scholes options valuation model is used for estimating the fair value of stock options, and the Monte-Carlo valuation model is used for estimating the fair value of performance units. Restricted stock units and stock success units are valued based on the fair value of common stock at the grant date. Stock-based awards are expensed over the requisite service

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Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

period, or for performance units over the requisite service period, or remaining service period, if and when it becomes probable that the performance conditions will be satisfied, with an offsetting increase to additional paid-in capital in stockholders' equity. Forfeitures of stock-based awards are recognized as they occur. See Note 11.

Earnings Per Share: We compute basic earnings per share by dividing net income by the weighted average number of common shares outstanding for the period. Earnings per share assuming dilution is computed by dividing net income by the weighted average number of shares outstanding for the period plus the shares representing the dilutive effect of stock-based awards. In computing earnings per share assuming dilution, only potential common shares resulting from stock-based awards that are dilutive (those that reduce earnings per share) are included. We use the treasury stock method to account for the effect of outstanding stock options and nonvested stock awards on the computation of earnings per share assuming dilution. See Note 10.

Translation of Foreign Currency: Revenues and expenses of our foreign operations are translated at average exchange rates. Assets and liabilities are translated at the rate of exchange on the balance sheet dates. The translation gain or loss is generally reported in accumulated other comprehensive income, net of income tax. We do not provide for deferred taxes to the extent unremitted foreign earnings are deemed permanently invested.

Accounting for Participating Individual Life Insurance: Participating policies issued by one of our subsidiaries prior to its 1986 conversion from a mutual to a stock life insurance company will remain participating as long as the policies remain in-force. A Participation Fund Account (PFA) was established for the benefit of all such individual participating life and annuity policies and contracts. The assets of the PFA provide for the benefit, dividend, and certain expense obligations of the participating individual life insurance policies and annuity contracts. The assets of the PFA were $250.2 million and $297.7 million at December 31, 2022 and 2021, respectively.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

Accounting Updates Adopted in 2022:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity	The amendments in this update simplified the accounting for convertible instruments by removing certain separation models in the guidance related to convertible instruments and expanded related disclosure requirements. The amendments also revised the requirements for a contract or embedded derivative that is potentially settled in an entity's own stock to be classified as equity and also amended certain guidance related to the computations of earnings per share for convertible instruments and contracts in an entity's own stock. This guidance was applied in the period of adoption.	January 1, 2022	The adoption of this update did not have an effect on our financial position or results of operations, and did not expand our disclosures.

Accounting Updates Adopted in 2021:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes	The amendments in this update simplified the accounting for income taxes by removing certain exceptions in the guidance related to the following: 1. losses in continuing operations when there is income in other items, 2. foreign subsidiaries becoming equity method investments and vice versa, and 3. year-to-date interim period losses exceeding anticipated loss for the year. The amendments also simplified the accounting for income taxes related to the following: 1. franchise taxes partially based on income, 2. step up in the tax basis of goodwill, 3. allocation of tax expense to entities not subject to tax, 4. enacted changes in tax law or rates in interim periods, and 5. employee stock ownership programs and investments in qualified affordable housing projects accounted for using the equity method.	January 1, 2021	The adoption of this update did not have a material effect on our financial position or results of operations.

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Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

Accounting Updates Adopted in 2020:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment	This update eliminated the requirement to calculate the implied fair value of goodwill (the second step in the former two-step test) to measure a goodwill impairment charge. Instead, entities should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the excess of the carrying amount over the fair value, with the loss not to exceed the total amount of goodwill allocated to that reporting unit. This guidance was applied in the period of adoption.	January 1, 2020	The adoption of this update did not have an effect on our financial position or results of operations.
ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement	This update amended the fair value measurement guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removed certain disclosures related to Level 1 and Level 2 transfers and removed the discussion regarding valuation processes of Level 3 fair value measurements. The update modified guidance related to investments in certain entities that calculate net asset value to explicitly require disclosure regarding timing of liquidation of the investee's assets and timing of redemption restrictions. The update added disclosures around the changes in unrealized gains and losses in other comprehensive income for recurring Level 3 investments held at the end of the reporting period and adds disclosures regarding certain unobservable inputs on Level 3 fair value measurements. The guidance was applied both retrospectively and prospectively, depending on the specific requirement of the update.	December 31, 2018 for the removal and modification of certain disclosures and January 1, 2020 for the addition of certain disclosures.	The adoption of this update modified our disclosures but did not have an impact on our financial position or results of operations.

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Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans	This update amends the defined benefit pension and other postretirement benefit guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removes the requirement to disclose the effects of a one-percentage point change in the assumed healthcare cost trend and the requirement to disclose amounts in accumulated other comprehensive income expected to be recognized as part of net periodic benefit cost of the next year. This update adds a requirement to describe the reasons for significant gains and losses related to changes in the benefit obligation for the period. The update also clarifies that the projected benefit obligation (PBO) and accumulated benefit obligation (ABO) and fair value of plan assets are to be disclosed for plans with PBOs or ABOs in excess of plan assets. The guidance was applied retrospectively.	December 31, 2020	The adoption of this update modified our disclosures but did not have an impact on our financial position or results of operations.
ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses	This update amended the guidance on the impairment of financial instruments. The update added an impairment model known as the current expected credit loss model that is based on expected losses rather than incurred losses and will generally result in earlier recognition of allowances for losses. The current expected credit loss model applies to financial instruments such as mortgage loans, fixed maturity securities classified as held-to-maturity, and certain receivables. The update also modified the other-than-temporary impairment model used for available-for-sale fixed maturity securities such that credit losses are recognized as an allowance rather than as a reduction in the amortized cost of the security. The reversal of previously recognized credit losses on available-for-sale fixed maturity securities is allowed under specified circumstances. Additional disclosures are also required, including information used to develop the allowance for losses. The guidance was applied using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. For available-for-sale fixed maturity securities, the update was applied prospectively. Other-than-temporary impairment losses recognized on available-for-sale fixed maturity securities prior to adoption of the update cannot be reversed. This guidance was applied in the period of adoption.	January 1, 2020	The adoption of this update resulted in a cumulative-effect reduction to retained earnings of $18.9 million with a corresponding decrease to mortgage loans of $8.3 million, a decrease to accounts and premiums receivable of $13.5 million and a decrease to deferred income tax of $5.0 million. There were also immaterial impacts to reinsurance recoverable and other liabilities.

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Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

Accounting Updates Outstanding:

ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and related amendments

The amendments in this update provide optional guidance, for a limited period of time, to ease the potential burden in accounting for and recognizing the effects of reference rate reform on financial reporting. The guidance allows for various practical expedients and exceptions when applying GAAP to contracts, hedging relationships, and other transactions affected either by discontinued rates as a direct result of reference rate reform or a market-wide change in interest rates used for discounting, margining or contract price alignment, if certain criteria are met. Specifically, the guidance provides certain practical expedients for contract modifications, fair value hedges, and cash flow hedges, and also provides certain exceptions related to changes in the critical terms of a hedging relationship. The guidance also allows for a one-time election to sell or transfer debt securities that were both classified as held-to-maturity prior to January 1, 2020 and reference a rate affected by the reform.

The adoption of this update is permitted as of the beginning of the interim period that includes March 12, 2020 (the issuance date of the update), or any date thereafter, through December 31, 2024, at which point the guidance will sunset. We do not anticipate needing to adopt this guidance, but we will continue to monitor our contracts and hedging relationships throughout the adoption period.

ASU 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts and related amendments

This update significantly amends the accounting and disclosure requirements for long-duration insurance contracts. These changes include a requirement to review, and if necessary, update cash flow assumptions used to measure the liability for future policy benefits for traditional and limited-payment contracts at least annually, with changes recognized in earnings. In addition, an entity will be required to update the discount rate assumption at each reporting date using a yield that is reflective of an upper-medium grade fixed-income instrument, with changes recognized in other comprehensive income (loss) (OCI). These changes result in the elimination of the provision for risk of adverse deviation and premium deficiency (or loss recognition) testing. The update also requires that an entity measure all market risk benefits associated with deposit contracts at fair value, with changes recognized in earnings except for the portion attributable to a change in the instrument-specific credit risk, which is to be recognized in OCI. This update also simplifies the amortization of deferred acquisition costs by requiring amortization on a constant level basis over the expected term of the related contracts. Deferred acquisition costs are required to be written off for unexpected contract terminations but are no longer subject to an impairment test. Significant additional disclosures will also be required, which include disaggregated rollforwards of certain liability balances and the disclosure of qualitative and quantitative information about expected cash flows, estimates, and assumptions. The application of this guidance will vary based upon the specific requirements of the update but will generally result in either a modified retrospective or full retrospective approach with changes applied as of the beginning of the earliest period presented. Early adoption is permitted. The update is effective for periods beginning January 1, 2023.

We will adopt this update effective January 1, 2023 using the modified retrospective approach with changes applied as of the beginning of the earliest period presented or January 1, 2021, also referred to as the transition date. We are continuing to evaluate the effects of implementing this update. The most significant impact at the transition date will be the requirement to update the discount rate assumption to reflect an upper-medium grade fixed-income instrument, which will be generally equivalent to a single-A interest rate matched to the duration of our insurance liabilities and will result in a decrease to accumulated other comprehensive income (loss) (AOCI) within our total stockholders’ equity balance. After the transition date, we will be required to update the discount rate each subsequent reporting period with changes recorded in OCI and expect that this could have a material impact on OCI.

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Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

Our modified retrospective adoption of this update during the first quarter of 2023 will result in a decrease to AOCI as of the transition date, January 1, 2021, of approximately $6.7 billion. We expect a decrease to AOCI at December 31, 2021 in a range from approximately $5.4 billion to $5.6 billion. We expect a decrease to AOCI at December 31, 2022 in a range from approximately $0.6 billion to $0.8 billion.

The decrease in AOCI in our recast of 2021 and 2022 is driven primarily by the difference between the discount rate applied under current GAAP, which is based on an expected investment yield from our current investment strategy, and the single-A discount rate that will be required as a part of the update. The most significant impact relates to our longest duration products. Our investment strategy reflects the illiquid nature of the majority of our liability cash flows and, as a result, the yields in our investment portfolios supporting the cash outflows required for these products are generally higher than a single-A yield. In addition, the discount rates currently applied to reserves for our longest duration products, such as long-term care, include an assumption for long-term yields rising to more historical levels.

Our modified retrospective adoption is expected to result in an increase to net income during 2021 and 2022. We expect the increase in 2021 net income to be between approximately $145 million and $175 million, or between $0.70 and $0.85 per diluted per common share. We expect the increase in 2022 net income to be between approximately $80 million and $110 million, or $0.40 and $0.55 per diluted common share.

The net favorable impact of the recast of our net income for 2021 and 2022 shown above is due primarily to the following changes:

•Updating the lifetime cohort net premium ratios (lifetime loss ratio) for actual experience each reporting period will generally cause earnings patterns to be more consistent from period to period, with variances in experience reflected in earnings over the cohort lifetime. This will result in an unfavorable impact to income for 2021 and 2022.

•Alignment of amortization of deferred acquisition costs to a constant level basis and modification of amortization periods to reflect the expected term of the related contracts could result in either higher or lower income for the affected product lines. This will result in a net favorable impact to income for 2021 and 2022.

•Accelerated recognition of the provision for adverse deviation or other differences from current best estimate values for policies issued prior to the transition date and due to not establishing the provision for policies issued on or after the transition date will generally result in higher income most notably in the initial years after the transition date. This will result in a favorable impact to income for 2021 and 2022.

•Establishing reserves for claims incurred on or after the transition date at interest rates prescribed by the update could result in either higher or lower income for the affected product lines depending on the policy issue date and the interest rate environment at that time. This will result in an unfavorable impact to income for 2021 and a favorable impact to income for 2022.

•Updating cash flow assumptions could result in either higher or lower income. This will result in a favorable impact to income for 2021 and 2022.

•Applying non-contemporaneous reinsurance accounting to the second phase of our Closed Block individual disability reinsurance transaction which was completed in the first quarter of 2021. The primary impacts of this change are:

◦Reversing the increase in benefits and change in reserves for future benefits resulting from the realization of previously unrealized investment gains and losses previously recorded in AOCI that will be removed as of the transition date which will have a favorable impact on income for 2021.

◦Remeasuring the ceded reserves as a separate cohort of reserves at interest rates prescribed by the update and the resulting change to the cost of reinsurance. The differential in the discount rate applied to the direct and ceded cohorts of business will result in an unfavorable impact to income for 2021 and 2022 partially offset by a decrease in the amortization of the cost of reinsurance as a result of a lower cost of reinsurance.

We do not have products with market risk benefits. This update will also significantly expand our disclosures.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 1 - Significant Accounting Policies - Continued

ASU 2022-02, Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures

The amendments in this update eliminate the troubled debt restructuring recognition and measurement guidance and instead require that an entity evaluate whether the modification represents a new loan or the continuation of an existing loan. The amendments also enhance the disclosure requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. In addition, the amendments in this update require that an entity disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases. The amendments in this update should be applied prospectively, except for the transition method related to the recognition and measurement of troubled debt restructurings, for which an entity has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption.

This update is effective for periods beginning January 1, 2023, and we do not anticipate that the adoption of this update will have an effect on our financial position or results of operations but will expand our disclosures.

Note 2 - Fair Value of Financial Instruments

Fair Value Measurements for Financial Instruments Carried at Fair Value

We report fixed maturity securities, which are classified as available-for-sale securities, derivative financial instruments, and unrestricted equity securities at fair value in our consolidated balance sheets. We report our investments in private equity partnerships at our share of the partnerships' NAV per share or its equivalent as a practical expedient for fair value. See Note 1.

The degree of judgment utilized in measuring the fair value of financial instruments generally correlates to the level of pricing observability. Financial instruments with readily available active quoted prices or for which fair value can be measured from actively quoted prices in active markets generally have more pricing observability and less judgment utilized in measuring fair value. An active market for a financial instrument is a market in which transactions for an asset or a similar asset occur with sufficient frequency and volume to provide pricing information on an ongoing basis. A quoted price in an active market provides the most reliable evidence of fair value and should be used to measure fair value whenever available. Conversely, financial instruments rarely traded or not quoted have less observability and are measured at fair value using valuation techniques that require more judgment. Pricing observability is generally impacted by a number of factors, including the type of financial instrument, whether the financial instrument is new to the market and not yet established, the characteristics specific to the transaction, and overall market conditions.

We classify financial instruments in accordance with a fair value hierarchy consisting of three levels based on the observability of valuation inputs:

•Level 1 - the highest category of the fair value hierarchy classification wherein inputs are unadjusted and represent quoted prices in active markets for identical assets or liabilities at the measurement date.

•Level 2 - valued using inputs (other than prices included in Level 1) that are either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instrument's anticipated life.

•Level 3 - the lowest category of the fair value hierarchy and reflects the judgment of management regarding what market participants would use in pricing assets or liabilities at the measurement date. Financial assets and liabilities categorized as Level 3 are generally those that are valued using unobservable inputs to extrapolate an estimated fair value.

Valuation Methodologies of Financial Instruments Measured at Fair Value

Valuation techniques used for assets and liabilities accounted for at fair value are generally categorized into three types. The market approach uses prices and other relevant information from market transactions involving identical or comparable assets or liabilities. The income approach converts future amounts, such as cash flows or earnings, to a single present amount, or a

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Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

discounted amount. The cost approach is based upon the amount that currently would be required to replace the service capacity of an asset, or the current replacement cost.

We use valuation techniques that are appropriate in the circumstances and for which sufficient data are available that can be obtained without undue cost and effort. In some cases, a single valuation technique will be appropriate (for example, when valuing an asset or liability using quoted prices in an active market for identical assets or liabilities). In other cases, multiple valuation techniques will be appropriate. If we use multiple valuation techniques to measure fair value, we evaluate and weigh the results, as appropriate, considering the reasonableness of the range indicated by those results. A fair value measurement is the point within that range that is most representative of fair value in the circumstances.

The selection of the valuation method(s) to apply considers the definition of an exit price and depends on the nature of the asset or liability being valued. For assets and liabilities accounted for at fair value, we generally use valuation techniques consistent with the market approach, and to a lesser extent, the income approach. We believe the market approach provides more observable data than the income approach, considering the type of investments we hold. Our fair value measurements could differ significantly based on the valuation technique and available inputs. When using a pricing service, we obtain the vendor's pricing documentation to ensure we understand their methodologies. We periodically review and approve the selection of our pricing vendors to ensure we are in agreement with their current methodologies. When markets are less active, brokers may rely more on models with inputs based on the information available only to the broker. Our internal investment management professionals, which include portfolio managers and analysts, monitor securities priced by brokers and evaluate their prices for reasonableness based on benchmarking to available primary and secondary market information. In weighing a broker quote as an input to fair value, we place less reliance on quotes that do not reflect the result of market transactions. We also consider the nature of the quote, particularly whether it is a bid or market quote. If prices in an inactive market do not reflect current prices for the same or similar assets, adjustments may be necessary to arrive at fair value. When relevant market data is unavailable, which may be the case during periods of market uncertainty, the income approach can, in suitable circumstances, provide a more appropriate fair value. During 2022, we have applied valuation approaches and techniques on a consistent basis to similar assets and liabilities and consistent with those approaches and techniques used at year end 2021.

Fixed Maturity and Equity Securities

We use observable and unobservable inputs in measuring the fair value of our fixed maturity and equity securities. For securities categorized as Level 1, fair values equal active Trade Reporting and Compliance Engine (TRACE) pricing or unadjusted market maker prices. For securities categorized as Level 2 or Level 3, inputs that may be used in valuing each class of securities at any given time period are disclosed below. Actual inputs used to determine fair values will vary for each reporting period depending on the availability of inputs which may, at times, be affected by the lack of market liquidity.

		Level 2	Level 3
Instrument		Observable Inputs	Unobservable Inputs
United States Government and Government Agencies and Authorities
	Valuation Method	Principally the market approach	Not applicable
	Valuation Techniques / Inputs	Prices obtained from external pricing services
States, Municipalities, and Political Subdivisions
	Valuation Method	Principally the market approach	Principally the market approach
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Analysis of similar bonds, adjusted for comparability
		Relevant reports issued by analysts and rating agencies
		Audited financial statements

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Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

		Level 2	Level 3
Instrument		Observable Inputs	Unobservable Inputs
Foreign Governments
	Valuation Method	Principally the market approach	Principally the market approach
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Analysis of similar bonds, adjusted for comparability
		Non-binding broker quotes
		Call provisions
Public Utilities
	Valuation Method	Principally the market and income approaches	Principally the market and income approaches
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Change in benchmark reference
Public Utilities - Continued
		Non-binding broker quotes	Analysis of similar bonds, adjusted for comparability
		Benchmark yields	Discount for size - illiquidity
		Transactional data for new issuances and secondary trades	Volatility of credit
		Security cash flows and structures	Lack of marketability
		Recent issuance / supply
		Audited financial statements
		Security and issuer level spreads
		Security creditor ratings/maturity/capital structure/optionality
		Public covenants
		Comparative bond analysis
		Relevant reports issued by analysts and rating agencies
Mortgage/Asset-Backed Securities
	Valuation Method	Principally the market and income approaches	Principally the market approach
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Analysis of similar bonds, adjusted for comparability
		Non-binding broker quotes	Prices obtained from external pricing services
		Security cash flows and structures
		Underlying collateral
		Prepayment speeds/loan performance/delinquencies
		Relevant reports issued by analysts and rating agencies
		Audited financial statements

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Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

		Level 2	Level 3
Instrument		Observable Inputs	Unobservable Inputs
All Other Corporate Bonds
	Valuation Method	Principally the market and income approaches	Principally the market and income approaches
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Change in benchmark reference
		Non-binding broker quotes	Discount for size - illiquidity
		Benchmark yields	Volatility of credit
		Transactional data for new issuances and secondary trades	Lack of marketability
		Security cash flows and structures	Prices obtained from external pricing services
		Recent issuance / supply
		Security and issuer level spreads
		Security creditor ratings/maturity/capital structure/optionality
All Other Corporate Bonds - Continued
		Public covenants
		Comparative bond analysis
		Relevant reports issued by analysts and rating agencies
		Audited financial statements
Redeemable Preferred Stocks
	Valuation Method	Principally the market approach	Principally the market approach
	Valuation Techniques / Inputs	Non-binding broker quotes	Financial statement analysis
		Benchmark yields
		Comparative bond analysis
		Call provisions
		Relevant reports issued by analysts and rating agencies
		Audited financial statements
Perpetual Preferred and Equity Securities
	Valuation Method	Principally the market approach	Principally the market and income approaches
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Financial statement analysis
		Non-binding broker quotes

The management of our investment portfolio includes establishing pricing policy and reviewing the reasonableness of sources and inputs used in developing pricing. We review all prices that vary between multiple pricing vendors by a threshold that is outside a normal market range for the asset type.  In the event we receive a vendor's market price that does not appear reasonable based on our market analysis, we may challenge the price and request further information about the assumptions and

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Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

methodologies used by the vendor to price the security. We may change the vendor price based on a better data source such as an actual trade. We also review all prices that did not change from the prior month to ensure that these prices are within our expectations. The overall valuation process for determining fair values may include adjustments to valuations obtained from our pricing sources when they do not represent a valid exit price. These adjustments may be made when, in our judgment and considering our knowledge of the financial conditions and industry in which the issuer operates, certain features of the financial instrument require that an adjustment be made to the value originally obtained from our pricing sources. These features may include the complexity of the financial instrument, the market in which the financial instrument is traded, counterparty credit risk, credit structure, concentration, or liquidity. Additionally, an adjustment to the price derived from a model typically reflects our judgment of the inputs that other participants in the market for the financial instrument being measured at fair value would consider in pricing that same financial instrument. In the event an asset is sold, we test the validity of the fair value determined by our valuation techniques by comparing the selling price to the fair value determined for the asset in the immediately preceding month end reporting period.

Certain of our investments do not have readily determinable market prices and/or observable inputs or may at times be affected by the lack of market liquidity. For these securities, we use internally prepared valuations, including valuations based on estimates of future profitability, to estimate the fair value. Additionally, we may obtain prices from independent third-party brokers to aid in establishing valuations for certain of these securities. Key assumptions used by us to determine fair value for these securities include risk free interest rates, risk premiums, performance of underlying collateral (if any), and other factors involving significant assumptions which may or may not reflect those of an active market.

The parameters and inputs used to validate a price on a security may be adjusted for assumptions about risk and current market conditions on a quarter to quarter basis, as certain features may be more significant drivers of valuation at the time of pricing. Changes to inputs in valuations are not changes to valuation methodologies; rather, the inputs are modified to reflect direct or indirect impacts on asset classes from changes in market conditions.

At December 31, 2022, approximately 13.0 percent of our fixed maturity securities were valued using active trades from TRACE pricing or market maker prices for which there was current market activity in that specific security (comparable to receiving one binding quote).  The prices obtained were not adjusted, and the assets were classified as Level 1.

The remaining 87.0 percent of our fixed maturity securities were valued based on non-binding quotes or other observable and unobservable inputs, as discussed below:

•71.0 percent of our fixed maturity securities were valued based on prices from pricing services that generally use observable inputs such as prices for securities or comparable securities in active markets in their valuation techniques. These assets were classified as Level 2. 

•15.1 percent of our fixed maturity securities were valued based on one or more non-binding broker quotes, if validated by observable market data. When only one price is available, it is used if observable inputs and analysis confirms that it is appropriate. These assets, for which we were able to validate the price using other observable market data, were classified as Level 2.

•0.9 percent of our fixed maturity securities were valued based on prices of comparable securities, internal models, or pricing services or other non-binding quotes with no other observable market data. These assets were classified as either Level 2 or Level 3, with the categorization dependent on whether there was other observable market data.  

Derivatives

Fair values for derivatives other than embedded derivatives in modified coinsurance arrangements are based on market quotes or pricing models and represent the net amount of cash we would have paid or received if the contracts had been settled or closed as of the last day of the period. Credit risk related to the counterparty and the Company is considered in determining the fair values of these derivatives. However, since we have collateralization agreements in place with each counterparty which limits our exposure, any credit risk is immaterial. Therefore, we determined that no adjustments for credit risk were required as of December 31, 2022 or 2021.

133

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

Fair values for our embedded derivative in a modified coinsurance arrangement are estimated using internal pricing models and represent the hypothetical value of the duration mismatch of assets and liabilities, interest rate risk, and third party credit risk embedded in the modified coinsurance arrangement.

We consider transactions in inactive markets to be less representative of fair value. We use all available observable inputs when measuring fair value, but when significant unobservable inputs are used, we classify these assets or liabilities as Level 3.

Private Equity Partnerships

Our private equity partnerships represent funds that are primarily invested in private credit, private equity, and real assets, as described below. Distributions received from the funds arise from income generated by the underlying investments as well as the liquidation of the underlying investments. There is generally not a public market for these investments.

134

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

The following tables present additional information about our private equity partnerships, including commitments for additional investments which may or may not be funded:

		December 31, 2022
Investment Category		Fair Value		Redemption Term / Redemption Notice	Unfunded Commitments
		(in millions of dollars)			(in millions of dollars)
Private Credit	(a)	$	239.3	Not redeemable	$	90.9
		35.7		Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice	13.4
Total Private Credit		275.0			104.3
Private Equity	(b)	453.6		Not redeemable	377.2
		31.7		Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice	39.1
Total Private Equity		485.3			416.3
Real Assets	(c)	373.9		Not redeemable	256.3
		60.1		Quarterly / 90 days notice	—
Total Real Assets		434.0			256.3
Total Partnerships		$	1,194.3		$	776.9

		December 31, 2021
Investment Category		Fair Value		Redemption Term / Redemption Notice	Unfunded Commitments
		(in millions of dollars)			(in millions of dollars)
Private Credit	(a)	$	240.6	Not redeemable	$	143.7
		38.8		Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice	6.8
Total Private Credit		279.4			150.5
Private Equity	(b)	365.8		Not redeemable	274.3
		18.8		Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice	50.3
Total Private Equity		384.6			324.6
Real Assets	(c)	256.2		Not redeemable	278.1
		58.4		Quarterly / 90 days notice	—
Total Real Assets		314.6			278.1
Total Partnerships		$	978.6		$	753.2

135

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

(a)Private Credit - The limited partnerships described in this category employ various investment strategies, generally providing direct lending or other forms of debt financing including first-lien, second-lien, mezzanine, and subordinated loans. The limited partnerships have credit exposure to corporates, physical assets, and/or financial assets within a variety of industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail) in North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 55 percent in the next 3 years, 34 percent during the period from 3 to 5 years, 9 percent during the period from 5 to 10 years, and 2 percent during the period from 10 to 15 years.

(b)Private Equity - The limited partnerships described in this category employ various strategies generally investing in controlling or minority control equity positions directly in companies and/or assets across various industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail), primarily in private markets within North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 35 percent in the next 3 years, 19 percent during the period from 3 to 5 years, 40 percent during the period from 5 to 10 years, and 6 percent during the period from 10 to 15 years.

(c)Real Assets - The limited partnerships described in this category employ various strategies, which include investing in the equity and/or debt financing of physical assets, including infrastructure (energy, power, water/wastewater, communications), transportation (including airports, ports, toll roads, aircraft, railcars) and real estate in North America, Europe, South America, and Asia.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 22 percent in the next 3 years, 28 percent during period from 3 to 5 years and 50 percent during the period from 5 to 10 years.

We record changes in our share of net asset value of the partnerships in net investment income. We receive financial information related to our investments in partnerships and generally record investment income on a one-quarter lag in accordance with our accounting policy.

136

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

The following tables present information about financial instruments measured at fair value on a recurring basis by fair value level, based on the observability of the inputs used.

	December 31, 2022
	Level 1		Level 2		Level 3		NAV		Total
	(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities	$	81.7	$	416.5	$	—	$	—	$	498.2
States, Municipalities, and Political Subdivisions	8.7		3,448.3		0.2		—		3,457.2
Foreign Governments	—		827.1		—		—		827.1
Public Utilities	160.1		4,796.8		—		—		4,956.9
Mortgage/Asset-Backed Securities	—		551.3		22.0		—		573.3
All Other Corporate Bonds	4,268.6		20,097.3		158.7		—		24,524.6
Redeemable Preferred Stocks	—		3.5		—		—		3.5
Total Fixed Maturity Securities	4,519.1		30,140.8		180.9		—		34,840.8
Other Long-term Investments
Derivatives
Forwards	—		5.6		—		—		5.6
Foreign Exchange Contracts	—		83.5		—		—		83.5
Total Derivatives	—		89.1		—		—		89.1
Perpetual Preferred and Equity Securities	—		9.6		16.2		—		25.8
Private Equity Partnerships	—		—		—		1,194.3		1,194.3
Total Other Long-term Investments	—		98.7		16.2		1,194.3		1,309.2
Total Financial Instrument Assets Carried at Fair Value	$	4,519.1	$	30,239.5	$	197.1	$	1,194.3	$	36,150.0
Liabilities
Other Liabilities
Derivatives
Forwards	$	—	$	48.5	$	—	$	—	$	48.5
Foreign Exchange Contracts	—		25.5		—		—		25.5
Embedded Derivative in Modified Coinsurance Arrangement	—		—		13.9		—		13.9
Total Derivatives	—		74.0		13.9		—		87.9
Total Financial Instrument Liabilities Carried at Fair Value	$	—	$	74.0	$	13.9	$	—	$	87.9

137

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

	December 31, 2021
	Level 1		Level 2		Level 3		NAV		Total
	(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities	$	—	$	580.1	$	—	$	—	$	580.1
States, Municipalities, and Political Subdivisions	—		4,714.1		13.4		—		4,727.5
Foreign Governments	—		1,125.8		20.8		—		1,146.6
Public Utilities	230.8		6,140.7		44.5		—		6,416.0
Mortgage/Asset-Backed Securities	—		451.1		187.2		—		638.3
All Other Corporate Bonds	3,288.7		25,673.2		861.5		—		29,823.4
Redeemable Preferred Stocks	—		4.1		—		—		4.1
Total Fixed Maturity Securities	3,519.5		38,689.1		1,127.4		—		43,336.0
Other Long-term Investments
Derivatives
Foreign Exchange Contracts	—		39.5		—		—		39.5
Total Derivatives	—		39.5		—		—		39.5
Perpetual Preferred and Equity Securities	—		27.9		5.8		—		33.7
Private Equity Partnerships	—		—		—		978.6		978.6
Total Other Long-term Investments	—		67.4		5.8		978.6		1,051.8
Total Financial Instrument Assets Carried at Fair Value	$	3,519.5	$	38,756.5	$	1,133.2	$	978.6	$	44,387.8
Liabilities
Other Liabilities
Derivatives
Foreign Exchange Contracts	$	—	$	35.0	$	—	$	—	$	35.0
Embedded Derivative in Modified Coinsurance Arrangement	—		—		30.1		—		30.1
Total Derivatives	—		35.0		30.1		—		65.1
Total Financial Instrument Liabilities Carried at Fair Value	$	—	$	35.0	$	30.1	$	—	$	65.1

138

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

Changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows:

	Year Ended December 31, 2022
	Fair Value Beginning of Year		Total Realized and Unrealized Investment Gains (Losses)  Included in				Purchases		Sales/Maturities		Level 3 Transfers				Fair Value End of Year		Change in Unrealized Gain (Loss) on Securities Held at the End of Period included in
			Earnings		OCI						Into		Out of				OCI		Earnings
	(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions	$	13.4	$	—	$	(0.1)	$	—	$	—	$	0.3	$	(13.4)	$	0.2	$	(0.1)	$	—
Foreign Governments	20.8		—		(0.8)		—		(20.0)		—		—		—		(0.8)		—
Public Utilities	44.5		—		(2.8)		—		(12.8)		15.6		(44.5)		—		(2.8)		—
Mortgage/Asset-Backed Securities	187.2		—		(0.3)		20.7		(10.6)		—		(175.0)		22.0		(0.3)		—
All Other Corporate Bonds	861.5		—		(32.0)		25.3		(102.3)		161.9		(755.7)		158.7		(32.0)		—
Total Fixed Maturity Securities	1,127.4		—		(36.0)		46.0		(145.7)		177.8		(988.6)		180.9		(36.0)		—
Perpetual Preferred and Equity Securities	5.8		3.0		—		7.1		—		0.3		—		16.2		—		3.0
Embedded Derivative in Modified Coinsurance Arrangement	(30.1)		16.2		—		—		—		—		—		(13.9)		—		16.2

139

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

	Year Ended December 31, 2021
	Fair Value Beginning of Year		Total Realized and Unrealized Investment Gains (Losses)  Included in				Purchases		Sales/Maturities		Level 3 Transfers				Fair Value End of Year		Change in Unrealized Gain (Loss) on Securities Held at the End of Period included in
			Earnings		OCI						Into		Out of				OCI		Earnings
	(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions	$	15.5	$	—	$	(2.1)	$	—	$	—	$	—	$	—	$	13.4	$	(2.1)	$	—
Foreign Governments	21.8		—		(1.0)		—		—		—		—		20.8		(1.0)		—
Public Utilities	185.7		—		(2.3)		—		(44.0)		36.0		(130.9)		44.5		(2.3)		—
Mortgage/Asset-Backed Securities	81.3		—		(96.0)		—		(72.3)		274.2		—		187.2		(96.0)		—
All Other Corporate Bonds	943.1		—		(24.6)		249.9		(80.2)		77.6		(304.3)		861.5		(24.6)		—
Total Fixed Maturity Securities	1,247.4		—		(126.0)		249.9		(196.5)		387.8		(435.2)		1,127.4		(126.0)		—
Perpetual Preferred and Equity Securities	4.7		0.1		—		1.0		—		—		—		5.8		—		0.1
Embedded Derivative in Modified Coinsurance Arrangement	(39.8)		9.7		—		—		—		—		—		(30.1)		—		9.7

Realized and unrealized investment gains and losses presented in the preceding tables represent gains and losses only for the time during which the applicable financial instruments were classified as Level 3. The transfers between levels resulted primarily from a change in observability of three inputs used to determine fair values of the securities transferred: (1) transactional data for new issuance and secondary trades, (2) broker/dealer quotes and pricing, primarily related to changes in the level of activity in the market and whether the market was considered orderly, and (3) comparable bond metrics from which to perform an analysis. For fair value measurements of financial instruments that were transferred either into or out of Level 3, we reflect the transfers using the fair value at the beginning of the period. We believe this allows for greater transparency, as all changes in fair value that arise during the reporting period of the transfer are disclosed as a component of our Level 3 reconciliation.

140

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

The table below provides quantitative information regarding the significant unobservable inputs used in Level 3 fair value measurements derived from internal models. Unobservable inputs for fixed maturity securities are weighted by the fair value of the securities. Certain securities classified as Level 3 are excluded from the table below due to limitations in our ability to obtain the underlying inputs used by external pricing sources.

	December 31, 2022
	Fair Value		Valuation Method	Unobservable Input		Range/Weighted Average
	(in millions of dollars)
Fixed Maturity Securities
All Other Corporate Bonds - Private	$	15.3	Market Approach	Volatility of Credit Market Convention	(a) (b)	5.41% - 5.41% / 5.41% Priced at Par Value
Perpetual Preferred and Equity Securities	16.2		Market Approach	Market Convention	(b)	Priced at Cost, Owner's Equity, or Most Recent Round
Embedded Derivative in Modified Coinsurance Arrangement	(13.9)		Discounted Cash Flows	Projected Liability Cash Flows Weighted Spread of Swap Curve	(d)	Actuarial Assumptions 0.6%

	December 31, 2021
	Fair Value		Valuation Method	Unobservable Input		Range/Weighted Average
	(in millions of dollars)
Fixed Maturity Securities
All Other Corporate Bonds - Private	$	111.8	Market Approach	Volatility of Credit Lack of Marketability	(a) (c)	6.30% - 6.30% / 6.30% 0.14% - 0.73% / 0.51%
Perpetual Preferred and Equity Securities	5.8		Market Approach	Market Convention	(b)	Priced at Cost or Owner's Equity
Embedded Derivative in Modified Coinsurance Arrangement	(30.1)		Discounted Cash Flows	Projected Liability Cash Flows Weighted Spread of Swap Curve	(d)	Actuarial Assumptions 0.7%

(a)Represents basis point adjustments for credit-specific factors

(b)Represents a decision to price based on par value, cost, owner's equity, or the price of the most recent capital funding round when limited data is available

(c)Represents basis point adjustments to apply a discount due to the illiquidity of an investment

(d)Represents various actuarial assumptions required to derive the liability cash flows. Fair value of embedded derivative is most often driven by the change in the weighted average credit spread to the swap curve for the assets backing the hypothetical loan

Other than market convention, the impact of isolated decreases in unobservable inputs will result in a higher estimated fair value, whereas isolated increases in unobservable inputs will result in a lower estimated fair value. The unobservable input for market convention is not sensitive to input movements. The projected liability cash flows used in the fair value measurement of our Level 3 embedded derivative are based on expected claim payments. If claim payments increase, the projected liability cash flows will increase, resulting in a decrease in the fair value of the embedded derivative. Decreases in projected liability cash flows will result in an increase in the fair value of the embedded derivative.

141

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

Fair Value Measurements for Financial Instruments Not Carried at Fair Value

The methods and assumptions used to estimate fair values of financial instruments not carried at fair value are discussed as follows:

Mortgage Loans: Fair value of newly originated, seasoned performing, or sub-performing but likely to continue cash flowing loans are calculated using a discounted cash flow analysis. Loans’ cash flows are modeled and appropriately discounted by a rate based on current yields and credit spreads. For sub and non-performing loans where there is some probability the loan will not continue to pay, a price based approach would be used to estimate the loan’s value in the open market utilizing current transaction information from similar loans.

Policy Loans: Fair values for policy loans, net of reinsurance ceded, are estimated using discounted cash flow analyses and interest rates currently being offered to policyholders with similar policies. Carrying amounts for ceded policy loans, which equal $3,312.5 million and $3,373.7 million as of December 31, 2022 and 2021, respectively, approximate fair value and are reported on a gross basis in our consolidated balance sheets. A change in interest rates for ceded policy loans will not impact our financial position because the benefits and risks are fully ceded to reinsuring counterparties.

Miscellaneous Long-term Investments: Carrying amounts for tax credit partnerships equal the unamortized balance of our contractual commitments and approximate fair value. Our shares of Federal Home Loan Bank (FHLB) common stock are carried at cost, which approximates fair value.

Long-term Debt: Fair values for long-term debt are obtained from independent pricing services or discounted cash flow analyses based on current incremental borrowing rates for similar types of borrowing arrangements.

FHLB Funding Agreements: Funding agreements with the FHLB represent cash advances used for the purpose of investing in fixed maturity securities. Carrying amounts approximate fair value.

Unfunded Commitments to Investment Partnerships: Unfunded equity commitments represent amounts that we have committed to fund certain investment partnerships. These commitments are legally binding, subject to the partnerships meeting specified conditions. Carrying amounts of these financial instruments approximate fair value.

142

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

The following table presents the carrying amounts and estimated fair values of our financial instruments not measured at fair value and indicates the level in the fair value hierarchy of the estimated fair value measurement based on the observability of the inputs used:

	December 31, 2022
	Estimated Fair Value
	Level 1		Level 2		Level 3		Total		Carrying Value
	(in millions of dollars)
Assets
Mortgage Loans	$	—	$	2,159.5	$	—	$	2,159.5	$	2,435.4
Policy Loans	—		—		3,677.0		3,677.0		3,601.2
Other Long-term Investments
Miscellaneous Long-term Investments	—		17.1		1.3		18.4		18.4
Total Financial Instrument Assets Not Carried at Fair Value	$	—	$	2,176.6	$	3,678.3	$	5,854.9	$	6,055.0
Liabilities
Long-term Debt	$	2,288.9	$	783.1	$	—	$	3,072.0	$	3,427.8
Other Liabilities
Unfunded Commitments	—		0.7		—		0.7		0.7
Payable for Collateral on FHLB Funding Agreements	—		99.1		—		99.1		99.1
Total Financial Instrument Liabilities Not Carried at Fair Value	$	2,288.9	$	882.9	$	—	$	3,171.8	$	3,527.6

143

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 2 - Fair Value of Financial Instruments - Continued

	December 31, 2021
	Estimated Fair Value
	Level 1		Level 2		Level 3		Total		Carrying Value
	(in millions of dollars)
Assets
Mortgage Loans	$	—	$	2,677.8	$	—	$	2,677.8	$	2,560.4
Policy Loans	—		—		3,807.1		3,807.1		3,662.9
Other Long-term Investments
Miscellaneous Long-term Investments	—		22.1		9.5		31.6		31.6
Total Financial Instrument Assets Not Carried at Fair Value	$	—	$	2,699.9	$	3,816.6	$	6,516.5	$	6,254.9
Liabilities
Long-term Debt	$	2,237.3	$	1,641.8	$	—	$	3,879.1	$	3,442.2
Other Liabilities
Unfunded Commitments	—		0.7		—		0.7		0.7
Payable for Collateral on FHLB Funding Agreements	—		160.9		—		160.9		160.9
Total Financial Instrument Liabilities Not Carried at Fair Value	$	2,237.3	$	1,803.4	$	—	$	4,040.7	$	3,603.8

The carrying values of financial instruments such as short-term investments, cash and bank deposits, accounts and premiums receivable, accrued investment income, securities lending agreements, and short-term debt approximate fair value due to the short-term nature of the instruments. As such, these financial instruments are not included in the above chart.

Fair values for insurance contracts other than investment contracts are not required to be disclosed. However, the fair values of liabilities under all insurance contracts are taken into consideration in our overall management of interest rate risk, which seeks to minimize exposure to changing interest rates through the matching of investment maturities with amounts due under insurance contracts.

144

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments

Fixed Maturity Securities

At December 31, 2022 and 2021, all fixed maturity securities were classified as available-for-sale. The amortized cost and fair values of securities by security type are shown as follows:

	December 31, 2022
	Amortized Cost, Gross of ACL(1)		ACL(1)		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	503.8	$	—	$	20.3	$	25.9	$	498.2
States, Municipalities, and Political Subdivisions	4,006.0		—		87.1		635.9		3,457.2
Foreign Governments	908.1		—		34.9		115.9		827.1
Public Utilities	5,170.9		—		141.0		355.0		4,956.9
Mortgage/Asset-Backed Securities	592.1		—		8.2		27.0		573.3
All Other Corporate Bonds	26,640.3		—		452.1		2,567.8		24,524.6
Redeemable Preferred Stocks	4.0		—		—		0.5		3.5
Total Fixed Maturity Securities	$	37,825.2	$	—	$	743.6	$	3,728.0	$	34,840.8

	December 31, 2021
	Amortized Cost, Gross of ACL(1)		ACL(1)		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	460.1	$	—	$	120.1	$	0.1	$	580.1
States, Municipalities, and Political Subdivisions	4,150.2		—		584.2		6.9		4,727.5
Foreign Governments	952.0		—		215.3		20.7		1,146.6
Public Utilities	5,266.4		—		1,159.4		9.8		6,416.0
Mortgage/Asset-Backed Securities	587.9		—		50.4		—		638.3
All Other Corporate Bonds	25,966.1		—		3,919.9		62.6		29,823.4
Redeemable Preferred Stocks	4.0		—		0.1		—		4.1
Total Fixed Maturity Securities	$	37,386.7	$	—	$	6,049.4	$	100.1	$	43,336.0

(1)Allowance for Credit Losses

145

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

The following charts indicate the length of time our fixed maturity securities have been in a gross unrealized loss position.

	December 31, 2022
	Less Than 12 Months				12 Months or Greater
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	246.6	$	22.6	$	12.2	$	3.3
States, Municipalities, and Political Subdivisions	1,920.1		476.1		346.6		159.8
Foreign Governments	160.1		47.9		176.9		68.0
Public Utilities	2,242.2		252.0		255.2		103.0
Mortgage/Asset-Backed Securities	386.6		27.0		0.1		—
All Other Corporate Bonds	15,865.6		1,799.7		2,194.1		768.1
Redeemable Preferred Stocks	3.5		0.5		—		—
Total Fixed Maturity Securities	$	20,824.7	$	2,625.8	$	2,985.1	$	1,102.2

	December 31, 2021
	Less Than 12 Months				12 Months or Greater
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	9.3	$	0.1	$	—	$	—
States, Municipalities, and Political Subdivisions	326.4		6.9		0.4		—
Foreign Governments	234.4		18.9		10.7		1.8
Public Utilities	263.3		9.1		17.6		0.7
Mortgage/Asset-Backed Securities	29.2		—		0.1		—
All Other Corporate Bonds	2,146.3		51.6		199.4		11.0
Total Fixed Maturity Securities	$	3,008.9	$	86.6	$	228.2	$	13.5

146

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

The following is a distribution of the maturity dates for fixed maturity securities. The maturity dates have not been adjusted for possible calls or prepayments.

	December 31, 2022
	Amortized Cost, Net of ACL(1)		Unrealized Gain Position				Unrealized Loss Position
			Gross Gain		Fair Value		Gross Loss		Fair Value
	(in millions of dollars)
1 year or less	$	1,133.5	$	2.9	$	339.1	$	5.7	$	791.6
Over 1 year through 5 years	7,090.8		86.7		1,953.2		238.4		4,985.9
Over 5 years through 10 years	10,096.7		294.8		3,538.9		863.8		5,988.8
Over 10 years	18,912.1		351.0		5,013.2		2,593.1		11,656.8
	37,233.1		735.4		10,844.4		3,701.0		23,423.1
Mortgage/Asset-Backed Securities	592.1		8.2		186.6		27.0		386.7
Total Fixed Maturity Securities	$	37,825.2	$	743.6	$	11,031.0	$	3,728.0	$	23,809.8

	December 31, 2021
	Amortized Cost, Net of ACL(1)		Unrealized Gain Position				Unrealized Loss Position
			Gross Gain		Fair Value		Gross Loss		Fair Value
	(in millions of dollars)
1 year or less	$	767.3	$	17.6	$	756.0	$	0.1	$	28.9
Over 1 year through 5 years	6,613.2		540.2		7,050.5		6.0		96.9
Over 5 years through 10 years	10,614.3		1,453.3		10,905.0		26.0		1,136.6
Over 10 years	18,804.0		3,987.9		20,778.4		68.0		1,945.4
	36,798.8		5,999.0		39,489.9		100.1		3,207.8
Mortgage/Asset-Backed Securities	587.9		50.4		609.0		—		29.3
Total Fixed Maturity Securities	$	37,386.7	$	6,049.4	$	40,098.9	$	100.1	$	3,237.1

(1)Allowance for Credit Losses

The following chart depicts an analysis of our fixed maturity security portfolio between investment-grade and below-investment-grade categories as of December 31, 2022:

					Gross Unrealized Loss
	Fair Value		Gross Unrealized Gain		Amount		Percent of Total Gross Unrealized Loss
	(in millions of dollars)
Investment-Grade	$	32,851.0	$	734.6	$	3,545.5	95.1	%
Below-Investment-Grade	1,989.8		9.0		182.5		4.9
Total Fixed Maturity Securities	$	34,840.8	$	743.6	$	3,728.0	100.0	%

The unrealized losses on investment-grade fixed maturity securities principally relate to changes in interest rates or changes in market or sector credit spreads which occurred subsequent to the acquisition of the securities. Below-investment-grade fixed maturity securities are generally more likely to develop credit concerns than investment-grade securities. At December 31, 2022, the unrealized losses in our below-investment-grade fixed maturity securities were generally due to credit spreads in certain industries or sectors and, to a lesser extent, credit concerns related to specific securities. For each specific security in an unrealized loss position, we believe that there are positive factors which mitigate credit concerns and that the securities for which we have not recorded a credit loss will recover in value. We have the ability and intent to continue to hold these securities to recovery of amortized cost and believe that no credit losses have occurred.

147

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

As of December 31, 2022, we held 882 individual investment-grade fixed maturity securities and 112 individual below-investment-grade fixed maturity securities that were in an unrealized loss position, of which 262 investment-grade fixed maturity securities and 16 below-investment-grade fixed maturity securities had been in an unrealized loss position continuously for over one year.

In determining when a decline in fair value below amortized cost of a fixed maturity security represents a credit loss, we evaluate the following factors:

•Whether we expect to recover the entire amortized cost basis of the security

•Whether we intend to sell the security or will be required to sell the security before the recovery of its amortized cost basis

•Whether the security is current as to principal and interest payments

•The significance of the decline in value

•Current and future business prospects and trends of earnings

•The valuation of the security's underlying collateral

•Relevant industry conditions and trends relative to their historical cycles

•Market conditions

•Rating agency and governmental actions

•Bid and offering prices and the level of trading activity

•Adverse changes in estimated cash flows for securitized investments

•Changes in fair value subsequent to the balance sheet date

•Any other key measures for the related security

While determining whether a credit loss exists is a judgmental area, we utilize a formal, well-defined, and disciplined process to monitor and evaluate our fixed income investment portfolio, supported by issuer specific research and documentation as of the end of each period. The process results in a thorough evaluation of problem investments and the recording of credit losses on a timely basis for investments determined to have a credit loss. We calculate the allowance for credit losses of fixed maturity securities based on the present value of our best estimate of cash flows expected to be collected, discounted using the effective interest rate implicit in the security at the date of acquisition. When estimating future cash flows, we analyze the strength of the issuer’s balance sheet, its debt obligations and near-term funding arrangements, cash flow and liquidity, the profitability of its core businesses, the availability of marketable assets which could be sold to increase liquidity, its industry fundamentals and regulatory environment, and its access to capital markets.

The following tables present a rollforward of the allowance for credit losses on available-for-sale fixed maturity securities, which were classified as "public utilities" during year ended December 31, 2022 and "all other corporate bonds" during the year ended December 31, 2021, respectively.

	Year Ended December 31
	2022		2021
	(in millions of dollars)
Balance, beginning of period	$	—	$	6.8
Credit losses on securities for which credit losses were not previously recorded	4.6		—
Change in allowance on securities with allowance recorded in previous period	—		0.5
Change in allowance on securities disposed during the period	(4.6)		(7.3)
Balance, end of period	$	—	$	—

In the fourth quarter of 2022, the issuer of a fixed maturity security previously classified as "public utilities" entered into a troubled debt restructuring agreement. In order to maximize recovery of the investment, the debt was restructured by way of principal reduction, interest forgiveness, and a debt to equity conversion. Principal owed was reduced by $4.8 million, semi-annual interest payments for the period beginning June 30, 2022 and ending June 30, 2024 were forgiven, and a portion of the remaining debt was converted to equity. As of December 31, 2022, we have received $4.9 million of an equity stake in the restructured entity, and have recorded receivables for $5.2 million and $2.8 million in cash to be received by March 31, 2023 and

148

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

December 31, 2023, respectively. The amortized cost of the fixed maturity security prior to the restructuring was $17.7 million, and the restructuring resulted in a total loss of $4.8 million, which was recognized during 2022.

At December 31, 2022, we had commitments of $58.7 million to fund private placement fixed maturity securities, the amount of which may or may not be funded. 

Variable Interest Entities

We invest in variable interests issued by variable interest entities. These investments, which are passive in nature, include minority ownership interests in private equity partnerships, tax credit partnerships, and special purpose entities. For those variable interests that are not consolidated in our financial statements, we are not the primary beneficiary because we have neither the power to direct the activities that are most significant to economic performance nor the responsibility to absorb a majority of the expected losses. The determination of whether we are the primary beneficiary is performed at the time of our initial investment and at the date of each subsequent reporting period.

As of December 31, 2022, the carrying amount of our variable interest entity investments that are not consolidated in our financial statements was $1,195.3 million, comprised of $1.0 million of tax credit partnerships and $1,194.3 million of private equity partnerships. At December 31, 2021, the carrying amount of our variable interest entity investments that are not consolidated in our financial statements was $987.9 million, comprised of $9.3 million of tax credit partnerships and $978.6 million of private equity partnerships.  These variable interest entity investments are reported as other long-term investments in our consolidated balance sheets.

The Company invests in tax credit partnerships primarily for the receipt of income tax credits and tax benefits derived from passive losses on the investments. Amounts recognized in the consolidated statements of income are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Income Tax Credits	$	8.0	$	21.6	$	33.2
Amortization, Net of Tax	(5.9)		(15.0)		(21.9)
Income Tax Benefit	$	2.1	$	6.6	$	11.3

Contractually, we are a limited partner in these tax credit partnerships, and our maximum exposure to loss is limited to the carrying value of our investment, which includes $0.7 million of unfunded unconditional commitments at December 31, 2022. See Note 2 for commitments to fund private equity partnerships.

Mortgage Loans

Our mortgage loan portfolio is well diversified by both geographic region and property type to reduce risk of concentration. All of our mortgage loans are collateralized by commercial real estate. When issuing a new loan, our general policy is not to exceed a loan-to-value ratio, or the ratio of the loan balance to the estimated fair value of the underlying collateral, of 75 percent. We update the loan-to-value ratios at least every three years for each loan, and properties undergo a general inspection at least every two years. Our general policy for newly issued loans is to have a debt service coverage ratio greater than 1.25 times on a normalized 25 year amortization period. We update our debt service coverage ratios annually.

We carry our mortgage loans at amortized cost less the allowance for expected credit losses. The amortized cost of our mortgage loans was $2,444.7 million and $2,568.7 million at December 31, 2022 and 2021, respectively. The allowance for expected credit losses was $9.3 million and $8.3 million at December 31, 2022 and 2021, respectively. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. We report accrued interest income for our mortgage loans as accrued investment income on our consolidated balance sheets, and the amount of the accrued income was $7.7 million and $8.1 million at December 31, 2022 and 2021, respectively.

149

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

The carrying amount of mortgage loans by property type and geographic region are presented below.

	December 31
	2022				2021
	(in millions of dollars)
	Carrying		Percent of		Carrying		Percent of
	Amount		Total		Amount		Total
Property Type
Apartment	$	688.6	28.3	%	$	780.0	30.5	%
Industrial	745.3		30.6		734.4		28.7
Office	423.0		17.4		467.2		18.2
Retail	534.5		21.9		533.3		20.8
Other	44.0		1.8		45.5		1.8
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

Region
New England	$	52.4	2.2	%	$	54.9	2.1	%
Mid-Atlantic	192.4		7.9		214.7		8.4
East North Central	313.0		12.9		298.4		11.7
West North Central	181.4		7.4		193.1		7.5
South Atlantic	539.3		22.1		582.1		22.7
East South Central	101.8		4.2		120.7		4.7
West South Central	212.6		8.7		243.2		9.6
Mountain	298.7		12.3		290.6		11.3
Pacific	543.8		22.3		562.7		22.0
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

The risk in our mortgage loan portfolio is primarily related to vacancy rates. Events or developments, such as economic conditions that impact the ability of the borrowers to ensure occupancy of the property, may have a negative effect on our mortgage loan portfolio, particularly to the extent that our portfolio is concentrated in an affected region or property type. An increase in vacancies increases the probability of default, which would negatively affect our expected losses in our mortgage loan portfolio.

We evaluate each of our mortgage loans individually for impairment and assign an internal credit quality rating based on a comprehensive rating system used to evaluate the credit risk of the loan. The factors we use to derive our internal credit ratings may include the following:

•Loan-to-value ratio based on internal appraisal of property

•Debt service coverage ratio based on current operating income

•Property location, including regional economics, trends, and demographics

•Age, condition, and construction quality of property

•Current and historical occupancy of property

•Lease terms relative to market

•Tenant size and financial strength

•Borrower's financial strength

•Borrower's equity in transaction

•Additional collateral, if any

Although all available and applicable factors are considered in our analysis, loan-to-value and debt service coverage ratios are the most critical factors in determining whether we will initially issue the loan and also in assigning values and determining impairment. We assign an overall rating to each loan using an internal rating scale of AA (highest quality) to B (lowest quality).

150

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

We review and adjust, as needed, our internal credit quality ratings on an annual basis. This review process is performed more frequently for mortgage loans deemed to have a higher risk of delinquency.

The following tables present information about mortgage loans by the applicable credit quality indicators:

	December 31
	2022				2021
	(in millions of dollars)
	Carrying Amount		Percent of Total		Carrying Amount		Percent of Total
Internal Rating
AA	$	92.3	3.8	%	$	27.3	1.1	%
A	843.9		34.6		709.6		27.7
BBB	1,458.0		59.9		1,802.6		70.4
BB	41.2		1.7		20.9		0.8
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

Loan-to-Value Ratio(1)
<= 65%	$	1,389.6	57.0	%	$	1,346.1	52.6	%
> 65% <= 75%	937.2		38.5		1,076.8		42.0
> 75% <= 85%	75.0		3.1		114.9		4.5
> 85%	33.6		1.4		22.6		0.9
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

The following table presents the amortized cost of our mortgage loans by year of origination and credit quality indicators for the years ended December 31, 2022 and 2021:

	Year Ended December 31, 2022
	Prior to 2018		2018		2019		2020		2021		2022		Total
	(in millions of dollars)
Internal Rating
AA	$	53.8	$	27.5	$	11.1	$	—	$	—	$	—	$	92.4
A	485.0		123.3		96.8		35.9		80.6		24.0		845.6
BBB	534.0		219.8		236.9		134.0		275.8		64.6		1,465.1
BB	35.7		5.9		—		—		—		—		41.6
Total Amortized Cost	1,108.5		376.5		344.8		169.9		356.4		88.6		2,444.7
Allowance for credit losses	(4.3)		(1.8)		(1.3)		(0.6)		(0.8)		(0.5)		(9.3)
Carrying Amount	$	1,104.2	$	374.7	$	343.5	$	169.3	$	355.6	$	88.1	$	2,435.4
Loan-to-Value Ratio(1)
<=65%	$	782.6	$	189.0	$	193.9	$	81.3	$	128.9	$	16.9	$	1,392.6
>65<=75%	230.2		181.6		150.9		80.1		227.5		71.7		942.0
>75%<=85%	67.5		—		—		8.5		—		—		76.0
>85%	28.2		5.9		—		—		—		—		34.1
Total Amortized Cost	1,108.5		376.5		344.8		169.9		356.4		88.6		2,444.7
Allowance for credit losses	(4.3)		(1.8)		(1.3)		(0.6)		(0.8)		(0.5)		(9.3)
Carrying Amount	$	1,104.2	$	374.7	$	343.5	$	169.3	$	355.6	$	88.1	$	2,435.4

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

151

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

	Year Ended December 31, 2021
	Prior to 2017		2017		2018		2019		2020		2021		Total
	(in millions of dollars)
Internal Rating
AA	$	3.3	$	—	$	24.0	$	—	$	—	$	—	$	27.3
A	414.6		68.0		71.1		28.9		17.6		110.6		710.8
BBB	561.2		227.3		283.3		331.9		163.1		242.6		1,809.4
BB	5.0		10.2		6.0		—		—		—		21.2
Total Amortized Cost	984.1		305.5		384.4		360.8		180.7		353.2		2,568.7
Allowance for credit losses	(2.6)		(1.4)		(1.4)		(1.4)		(0.7)		(0.8)		(8.3)
Carrying Amount	$	981.5	$	304.1	$	383.0	$	359.4	$	180.0	$	352.4	$	2,560.4
Loan-to-Value Ratio(1)
<=65%	$	779.1	$	146.9	$	163.0	$	80.7	$	54.3	$	124.7	$	1,348.7
>65<=75%	115.7		115.4		215.4		280.1		126.4		228.5		1,081.5
>75%<=85%	89.3		26.3		—		—		—		—		115.6
>85%	—		16.9		6.0		—		—		—		22.9
Total Amortized Cost	984.1		305.5		384.4		360.8		180.7		353.2		2,568.7
Allowance for credit losses	(2.6)		(1.4)		(1.4)		(1.4)		(0.7)		(0.8)		(8.3)
Carrying Amount	$	981.5	$	304.1	$	383.0	$	359.4	$	180.0	$	352.4	$	2,560.4

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

The following tables present a roll forward of allowance for expected credit losses by loan-to-value ratio for the years ended December 31, 2022 and 2021:

	Year Ended December 31, 2022
	Beginning of Period		Current Period Provisions		Write-Offs		Recoveries		End of Period
	(in millions of dollars)
Loan-to-Value Ratio(1)
<=65%	$	2.6	$	0.4	$	—	$	—	$	3.0
>65<=75%	4.7		—		—		—		4.7
>75%<=85%	0.7		0.4		—		—		1.1
>85%	0.3		0.2		—		—		0.5
Total	$	8.3	$	1.0	$	—	$	—	$	9.3

	Year Ended December 31, 2021
	Beginning of Period		Current Period Provisions		Write-Offs		Recoveries		End of Period
	(in millions of dollars)
Loan-to-Value Ratio(1)
<=65%	$	3.4	$	(0.8)	$	—	$	—	$	2.6
>65<=75%	7.3		(2.6)		—		—		4.7
>75%<=85%	1.3		(0.6)		—		—		0.7
>85%	1.1		(0.8)		—		—		0.3
Total	$	13.1	$	(4.8)	$	—	$	—	$	8.3

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

152

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

The increase in our estimate of expected losses during the year ended December 31, 2022 is primarily driven by heightened uncertainty surrounding the future macroeconomic outlook and reflects market conditions as of December 31, 2022.The decrease in our estimate of expected losses during the year ended December 31, 2021 is primarily due to improved economic conditions and recovery from COVID-19, especially as it relates to underlying commercial real estate values, and reflects market conditions at December 31, 2021.

There were no troubled debt restructurings during 2022, 2021 or 2020. At December 31, 2022, we held no mortgage loans that were greater than 90 days past due regarding principal and/or interest payments.

We had no loan foreclosures for the years ended December 31, 2022, 2021, or 2020.

For the years ended December 31, 2022, 2021, and 2020 we had no impaired mortgage loans. We did not recognize any interest income during 2022, 2021 or 2020 on mortgage loans subsequent to impairment.

For the years ended December 31, 2022 and 2021, we had commitments of $5.0 million and $26.3 million, respectively to fund certain commercial mortgage loans. Consistent with how we determine the estimate of current expected credit losses for our funded mortgage loans each period, we estimate expected credit losses for loans that have not been funded but we are committed to fund at the end of each period. For the year ended December 31, 2022, we had a nominal amount of expected credit losses related to unfunded commitments on our consolidated balance sheets. For the year ended December 31, 2021, we had $0.1 million of expected credit losses related to unfunded commitments on our consolidated balance sheets.

Investment Real Estate

Our investment real estate balance was $71.6 million and $119.5 million at December 31, 2022 and 2021, respectively, and the associated accumulated depreciation was $122.1 million and $171.3 million at December 31, 2022 and 2021, respectively. We did not recognize any impairments related to our real estate during 2022 or 2021. For the year ended December 31, 2020, we recognized $36.6 million in impairments related to certain of our real estate held for investment.

During the first quarter of 2022, we reclassified one property previously held for the production of income to property held for sale. The carrying value of the property was $40.1 million and $40.9 million as of December 31, 2022 and December 31, 2021, respectively, and is primarily recorded within our Corporate segment. The estimated fair value less cost to sell is above the carrying value of the property, and we expect to close the sale of the property in the first quarter of 2023.

During the third quarter of 2022, we reclassified one property previously held for the production of income to property held for sale. The property had a carrying value of $0.8 million as of December 31, 2022 and December 31, 2021, respectively, and is recorded within our Corporate segment. The estimated fair value less cost to sell is above the carrying value for this property, and we expect to close the sale of this property during 2023.

During the third quarter of 2022 we reclassified one additional property previously held for the production of income to property held for sale. In November of 2022, we closed on the sale of this property. At the time of sale the carrying value of this property was $3.4 million, and we recognized a nominal realized gain.

Transfers of Financial Assets

To manage our cash position more efficiently, we may enter into repurchase agreements with unaffiliated financial institutions. We generally use repurchase agreements as a means to finance the purchase of invested assets or for short-term general business purposes until projected cash flows become available from our operations or existing investments. Our repurchase agreements are typically outstanding for less than 30 days. We post collateral through our repurchase agreement transactions whereby the counterparty commits to purchase securities with the agreement to resell them to us at a later, specified date. The fair value of collateral posted is generally 102 percent of the cash received.

Our investment policy also permits us to lend fixed maturity securities to unaffiliated financial institutions in short-term securities lending agreements. These agreements increase our investment income with minimal risk. Our securities lending policy requires that a minimum of 102 percent of the fair value of the securities loaned be maintained as collateral. We may

153

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

receive cash and/or securities as collateral under these agreements. Cash received as collateral is typically reinvested in short-term investments. If securities are received as collateral, we are not permitted to sell or re-post them.

As of December 31, 2022, the carrying amount of fixed maturity securities loaned to third parties under our securities lending program was $152.4 million, for which we received collateral in the form of cash and securities of $88.5 million and $69.8 million, respectively. As of December 31, 2021, the carrying amount of fixed maturity securities loaned to third parties under our securities lending program was $283.7 million, for which we received collateral in the form of cash and securities of $94.8 million and $198.6 million, respectively. We had no outstanding repurchase agreements at December 31, 2022 or 2021.

The remaining contractual maturities of our securities lending agreements disaggregated by class of collateral pledged are as follows:

	December 31
	2022		2021
	Overnight and Continuous
	(in millions of dollars)
Borrowings
United States Government and Government Agencies and Authorities	$	0.3	$	0.1
State, Municipalities, and Political Subdivisions	—		0.1
Public Utilities	6.3		3.1
All Other Corporate Bonds	81.9		91.5
Total Borrowings	$	88.5	$	94.8
Gross Amount of Recognized Liability for Securities Lending Transactions	88.5		94.8
Amounts Related to Agreements Not Included in Offsetting Disclosure Contained Herein	$	—	$	—

Certain of our U.S. insurance subsidiaries are members of regional FHLBs. Membership, which requires that we purchase a minimum amount of FHLB common stock on which we receive dividends, provides access to low-cost funding. Advances received from the FHLB are used for the purchase of fixed maturity securities. Additional common stock purchases may be required, based on the amount of funds we borrow from the FHLBs. The carrying value of common stock owned, collateral posted, and advances received are as follows:

	December 31
	2022		2021
	(in millions of dollars)
Carrying Value of FHLB Common Stock	$	17.1	$	22.1
Advances from FHLB	99.1		160.9
Carrying Value of Collateral Posted to FHLB
Fixed Maturity Securities	$	527.1	$	786.1
Commercial Mortgage Loans	801.9		930.0
Total Carrying Value of Collateral Posted to FHLB	$	1,329.0	$	1,716.1

Offsetting of Financial Instruments

We enter into master netting agreements with each of our derivative's counterparties. These agreements provide for conditional rights of set-off upon the occurrence of an early termination event. An early termination event is considered a default, and it allows the non-defaulting party to offset its contracts in a loss position against any gain positions or payments due to the defaulting party. Under our agreements, default type events are defined as failure to pay or deliver as contractually agreed, misrepresentation, bankruptcy, or merger without assumption. See Note 4 for further discussion of collateral related to our derivative contracts.

154

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

We have securities lending agreements with unaffiliated financial institutions that post collateral to us in return for the use of our fixed maturity securities. A right of set-off exists that allows us to keep and apply collateral received in the event of default by the counterparty. Default within a securities lending agreement would typically occur if the counterparty failed to return the securities borrowed from us as contractually agreed. In addition, if we default by not returning collateral received, the counterparty has a right of set-off against our securities or any other amounts due to us.

Shown below are our financial instruments that either meet the accounting requirements that allow them to be offset in our balance sheets or that are subject to an enforceable master netting arrangement or similar agreement. Our accounting policy is to not offset these financial instruments in our balance sheets. Net amounts disclosed below have been reduced by the amount of collateral pledged to or received from our counterparties.

	December 31, 2022
	Gross Amount						Gross Amount Not
	of Recognized		Gross Amount		Net Amount		Offset in Balance Sheet
	Financial		Offset in		Presented in		Financial		Cash		Net
	Instruments		Balance Sheet		Balance Sheet		Instruments		Collateral		Amount
	(in millions of dollars)
Financial Assets:
Derivatives	$	89.1	$	—	$	89.1	$	(38.0)	$	(49.4)	$	1.7
Securities Lending	152.4		—		152.4		(63.9)		(88.5)		—
Total	$	241.5	$	—	$	241.5	$	(101.9)	$	(137.9)	$	1.7
Financial Liabilities:
Derivatives	$	74.0	$	—	$	74.0	$	(73.2)	$	—	$	0.8
Securities Lending	88.5		—		88.5		(88.5)		—		—
Total	$	162.5	$	—	$	162.5	$	(161.7)	$	—	$	0.8

	December 31, 2021
	Gross Amount						Gross Amount Not
	of Recognized		Gross Amount		Net Amount		Offset in Balance Sheet
	Financial		Offset in		Presented in		Financial		Cash		Net
	Instruments		Balance Sheet		Balance Sheet		Instruments		Collateral		Amount
	(in millions of dollars)
Financial Assets:
Derivatives	$	39.5	$	—	$	39.5	$	(9.8)	$	(28.4)	$	1.3
Securities Lending	283.7		—		283.7		(188.9)		(94.8)		—
Total	$	323.2	$	—	$	323.2	$	(198.7)	$	(123.2)	$	1.3
Financial Liabilities:
Derivatives	$	35.0	$	—	$	35.0	$	(34.0)	$	—	$	1.0
Securities Lending	94.8		—		94.8		(94.8)		—		—
Total	$	129.8	$	—	$	129.8	$	(128.8)	$	—	$	1.0

155

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

Net Investment Income

Net investment income reported in our consolidated statements of income is presented below.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities	$	1,849.8	$	1,888.2	$	2,164.0
Derivatives	57.8		68.6		78.7
Mortgage Loans	101.5		105.0		108.9
Policy Loans	20.0		19.7		20.0
Other Long-term Investments
Perpetual Preferred Securities1	5.0		6.9		(2.1)
Private Equity Partnerships2	110.1		165.4		19.8
Other	9.4		5.5		3.9
Short-term Investments	20.0		1.3		10.5
Gross Investment Income	2,173.6		2,260.6		2,403.7
Less Investment Expenses	39.4		35.1		30.6
Less Investment Income on Participation Fund Account Assets	12.0		12.3		12.4
Net Investment Income	$	2,122.2	$	2,213.2	$	2,360.7

1 The net unrealized gain (loss) recognized in net investment income for the year ended December 31, 2022 related to perpetual preferred securities still held at December 31, 2022 was $2.8 million. The net unrealized gain (loss) recognized in net investment income for the years ended December 31, 2021 and 2020 related to perpetual preferred securities still held at year-end was $4.4 million and $(4.6) million, respectively

2 Represents a net unrealized gain for the year ended December 31, 2022 related to private equity partnerships still held at December 31, 2022 of $124.1 million, reduced by net management fees and partnership expenses of $(14.0) million. For the years ended December 31, 2021 and 2020, the net unrealized gain related to private equity partnerships still held at year-end was $177.7 million and $29.1 million, respectively, reduced by net management fees and partnership expenses of $(12.3) million and $(9.3) million, respectively. See Note 2 for further discussion of private equity partnerships.

156

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 3 - Investments - Continued

Investment Gain and Loss

Investment gains and losses are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities
Gross Gains on Sales1	$	2.3	$	76.2	$	1,332.8
Gross Losses on Sales	(28.8)		(11.5)		(20.3)
Credit Losses	(4.6)		(9.3)		(53.6)
Mortgage Loans and Other Invested Assets
Gross Gains on Sales	1.4		5.8		1.9
Gross Losses on Sales	—		—		(0.3)
Impairment Loss	—		—		(36.6)
Change in Allowance for Credit Losses	(1.0)		4.7		(4.6)
Embedded Derivative in Modified Coinsurance Arrangement	16.2		9.7		(17.0)
All Other Derivatives	2.6		3.1		(2.5)
Foreign Currency Transactions	(3.8)		(2.0)		(0.7)
Net Investment Gain (Loss)	$	(15.7)	$	76.7	$	1,199.1

1Gross gains on sales of fixed maturity securities for the year ended December 31, 2021 includes gains of $67.6 million as a result of the second phase of the reinsurance transaction that we completed during the first quarter of 2021. Gross gains on sales of fixed maturity securities for the year ended December 31, 2020 includes gains of $1,302.3 million as a result of the first phase of the reinsurance transaction that we completed during the fourth quarter of 2020. See Note 12 for further discussion.

157

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments

Purpose of Derivatives

We are exposed to certain risks relating to our ongoing business operations. The primary risks managed by using derivative instruments are interest rate risk, risk related to matching duration for our assets and liabilities, foreign currency risk, credit risk, and equity risk. Historically, we have utilized current and forward interest rate swaps, current and forward currency swaps, forward benchmark interest rate locks, currency forward contracts, forward contracts on specific fixed income securities, credit default swaps, and total return swaps. Transactions hedging interest rate risk are primarily associated with our individual and group long-term care and individual and group disability products. All other product portfolios are periodically reviewed to determine if hedging strategies would be appropriate for risk management purposes. We do not use derivative financial instruments for speculative purposes.

Derivatives designated as cash flow hedges and used to reduce our exposure to interest rate and duration risk are as follows:

•Interest rate swaps were used to hedge interest rate risks and to improve the matching of assets and liabilities. An interest rate swap is an agreement in which we agree with other parties to exchange, at specified intervals, the difference between fixed rate and variable rate interest amounts. We used interest rate swaps to hedge the anticipated purchase of fixed maturity securities thereby protecting us from the potential adverse impact of declining interest rates on the associated policy reserves. We also used interest rate swaps to hedge the potential adverse impact of rising interest rates in anticipation of issuing fixed rate long-term debt.

•Forward benchmark interest rate locks are used to minimize interest rate risk associated with the anticipated purchase or disposal of fixed maturity securities or the anticipated issuance of fixed rate long term debt. A forward benchmark interest rate lock is a derivative contract without an initial investment where we and the counterparty agree to purchase or sell a specific benchmark interest rate fixed maturity bond at a future date at a pre-determined price or yield.

Derivatives designated as fair value hedges and previously used to reduce our exposure to interest rate and duration risk included:

•Interest rate swaps were used to effectively convert certain fixed rate, long-term debt into floating rate long-term debt. Under these swap agreements, we received a fixed rate of interest and paid a variable rate of interest.

Derivatives designated as either cash flow or fair value hedges and used to reduce our exposure to foreign currency risk are as follows:

•Foreign currency interest rate swaps are used to hedge the currency risk of certain foreign currency-denominated fixed maturity securities owned for portfolio diversification. Under these swap agreements, we agree to pay, at specified intervals, fixed rate foreign currency-denominated principal and interest payments in exchange for fixed rate payments in the functional currency of the operating segment.

Derivatives not designated as hedging instruments and used to reduce our exposure to foreign currency risk, credit losses on securities owned, and volatility of the underlying deferred assets in our non-qualified defined contribution plan are as follows:

•Foreign currency interest rate swaps previously designated as hedges were used to hedge the currency risk of certain foreign currency-denominated fixed maturity securities owned for portfolio diversification. These derivatives were effective hedges prior to novation to a new counterparty. In conjunction with the novation, these derivatives were de-designated as hedges. We agree to pay, at specified intervals, fixed rate foreign currency-denominated principal and interest payments in exchange for fixed rate payments in the functional currency of the operating segment. We hold offsetting swaps wherein we agree to pay fixed rate principal and interest payments in the functional currency of the operating segment in exchange for fixed rate foreign currency-denominated payments.

158

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

•Credit default swaps were used as economic hedges against credit risk but do not qualify for hedge accounting. A credit default swap is an agreement in which we agree with another party to pay, at specified intervals, a fixed-rate fee in exchange for insurance against a credit event on a specific investment. If a defined credit event occurred, our counterparty could have either paid us a net cash settlement, or we could have surrendered the specific investment to them in exchange for cash equal to the full notional amount of the swap. Credit events typically include events such as bankruptcy, failure to pay, or certain types of debt restructuring.

•Foreign currency forward contracts are used to minimize foreign currency risk. A foreign currency forward is a derivative without an initial investment where we and the counterparty agree to exchange a specific amount of currencies, at a specific exchange rate, on a specific date. We use these forward contracts to hedge the currency risk arising from foreign-currency denominated investments.

•Total Return Swaps are used to economically hedge a portion of the liability related to our non-qualified defined contribution plan. A total return swap is an agreement in which we pay a floating rate of interest to the counterparty and receive the total return on a portfolio of exchange traded funds. These swaps are cash settled on the last day of every month and the notional is re-established each month based on periodic distributions from and contributions to the plan assets.

Derivative Risks

The basic types of risks associated with derivatives are market risk (that the value of the derivative will be adversely impacted by changes in the market, primarily the change in interest and exchange rates) and credit risk (that the counterparty will not perform according to the terms of the contract). The market risk of the derivatives should generally offset the market risk associated with the hedged financial instrument or liability. To help limit the credit exposure of the derivatives, we enter into master netting agreements with our counterparties whereby contracts in a gain position can be offset against contracts in a loss position. We also typically enter into bilateral, cross-collateralization agreements with our counterparties to help limit the credit exposure of the derivatives. These agreements require the counterparty in a loss position to submit acceptable collateral with the other counterparty in the event the net loss position meets or exceeds an agreed upon amount. Credit exposure on derivatives is limited to the value of those contracts in a net gain position, including accrued interest receivable less collateral held. At December 31, 2022 and 2021, we had $1.7 million and $1.3 million credit exposure on derivatives, respectively. The table below summarizes the nature and amount of collateral received from and posted to our derivative counterparties.

	December 31
	2022		2021
	(in millions of dollars)
Carrying Value of Collateral Received from Counterparties
Cash	$	49.4	$	32.0
Carrying Value of Collateral Posted to Counterparties
Cash	$	5.1	$	—
Fixed Maturity Securities	39.6		27.6
	$	44.7	$	27.6

See Note 3 for further discussion of our master netting agreements.

The majority of our derivative instruments contain provisions that require us to maintain specified issuer credit ratings and financial strength ratings. Should our ratings fall below these specified levels, we would be in violation of the provisions, and our derivatives counterparties could terminate our contracts and request immediate payment. The aggregate fair value of all derivative instruments with credit risk-related contingent features that were in a liability position was $74.0 million and $35.0 million at December 31, 2022 and 2021, respectively.

159

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

Cash Flow Hedges

As of December 31, 2022 and 2021, we had $168.9 million and $181.3 million, respectively, notional amount of receive fixed, pay fixed, open current and forward foreign currency interest rate swaps to hedge fixed income foreign currency-denominated securities.

During 2022 we entered into $779.0 million of notional forward benchmark interest rate locks in order to hedge the anticipated purchase of fixed maturity securities. As of December 31, 2022, we had $764.0 million notional amount of forward benchmark interest rate locks.

During 2021, we entered into a $250.0 million notional forward benchmark interest rate lock in order to hedge the interest rate risk associated with the cash flows related to the early redemption of certain of our debt securities. We terminated the interest rate lock in 2021 and recognized a loss of $1.2 million that was reported as a cost related to the early retirement of debt in our income statement.

During the fourth quarter of 2020 and the first quarter of 2021, in connection with the Closed Block individual disability reinsurance transaction, we reclassified $30.7 million and $0.6 million, respectively, of deferred gains from accumulated other comprehensive income into earnings included in the net investment gain (loss) line item on our income statement. The deferred gains were related to previously terminated interest rate swaps designated as hedging instruments of fixed maturity securities in the Closed Block individual disability product line. See Note 12 for further discussion.

As of December 31, 2022, we expect to amortize approximately $35.4 million of net deferred gains on derivative instruments during the next twelve months. This amount will be reclassified from accumulated other comprehensive income into earnings and reported on the same income statement line item as the hedged item. The income statement line items that will be affected by this amortization are net investment income and interest and debt expense. Additional amounts that may be reclassified from accumulated other comprehensive income into earnings to offset the earnings impact of foreign currency translation of hedged items are not estimable.

As of December 31, 2022, we are hedging the variability of future cash flows associated with forecasted transactions through the year 2052.

Fair Value Hedges

As of December 31, 2022 and 2021, we had $557.8 million and $498.5 million notional amount of receive fixed, pay fixed, open current and forward foreign currency interest rate swaps to hedge fixed income foreign currency-denominated securities.

The following table summarizes the carrying amount of hedged assets and the related cumulative basis adjustments related to our fair value hedges:

	Carrying Amount of Hedged Assets				Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets
	December 31, 2022		December 31, 2021		December 31, 2022		December 31, 2021
	(in millions of dollars)
Fixed maturity securities:
Receive fixed functional currency interest, pay fixed foreign currency interest	$	394.4	$	466.3	$	(24.8)	$	2.0

For the years ended December 31, 2022, 2021, and 2020, $17.6 million, $16.6 million, and $(1.8) million, respectively, of the derivative instruments' gain (loss) was excluded from the assessment of hedge effectiveness. There were no instances wherein we discontinued fair value hedge accounting due to a hedged firm commitment no longer qualifying as a fair value hedge.

160

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

Derivatives not Designated as Hedging Instruments

As of December 31, 2022 and 2021, we held $132.0 million and $148.2 million, respectively, notional amount of receive fixed, pay fixed, foreign currency interest rate swaps. These derivatives are not designated as hedges, and as such, changes in fair value related to these derivatives are reported in earnings as a component of net investment gain or loss.

As of December 31, 2022, we held no single name credit default swaps. As of December 31, 2021, we held $11.6 million, respectively, notional amount of single name credit default swaps. We entered into these swaps in order to mitigate the credit risk associated with specific securities owned.

As of December 31, 2022 and 2021, we held $54.3 million and $41.7 million, respectively, notional amount of foreign currency forwards to mitigate the foreign currency risk associated with specific securities owned.

As of December 31, 2022 and 2021, we held $76.9 million and $89.2 million, respectively, notional amount of total return swaps to mitigate the volatility associated with changes in the fair value of the underlying notional assets in our non-qualified defined contribution plan. This derivative is an economic hedge not designated as a hedging instrument, and changes in fair value are reported as a component of other expenses in our income statement.

We have an embedded derivative in a modified coinsurance arrangement for which we include in our net investment gains and losses a calculation intended to estimate the value of the option of our reinsurance counterparty to cancel the reinsurance contract with us. However, neither party can unilaterally terminate the reinsurance agreement except in extreme circumstances resulting from regulatory supervision, delinquency proceedings, or other direct regulatory action. Cash settlements or collateral related to this embedded derivative are not required at any time during the reinsurance contract or at termination of the reinsurance contract. There are no credit-related counterparty triggers, and any accumulated embedded derivative gain or loss reduces to zero over time as the reinsured business winds down.

161

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

Locations and Amounts of Derivative Financial Instruments

The following tables summarize the notional amounts and fair values of derivative financial instruments, as reported in our consolidated balance sheets. Derivative assets are included in other long-term investments, while derivative liabilities are included in other liabilities within our consolidated balance sheets. The notional amounts represent the basis upon which our counterparty pay and receive amounts are calculated.

	December 31, 2022
			Derivative Assets		Derivative Liabilities
	Notional Amount		Fair Value		Fair Value
	(in millions of dollars)
Designated as Hedging Instruments
Cash Flow Hedges
Forward Benchmark Interest Rate Locks	$	764.0	$	1.6	$	48.4
Foreign Currency Interest Rate Swaps	168.9		17.5		3.1
Total Cash Flow Hedges	932.9		19.1		51.5
Fair Value Hedges
Foreign Currency Interest Rate Swaps	557.8		66.0		5.4
Total Designated as Hedging Instruments	$	1,490.7	$	85.1	$	56.9
Not Designated as Hedging Instruments
Foreign Currency Forwards	$	54.3	$	4.0	$	0.1
Foreign Currency Interest Rate Swaps	132.0		—		17.0
Total Return Swaps	76.9		—		—
Embedded Derivative in Modified Coinsurance Arrangement	—		—		13.9
Total Not Designated as Hedging Instruments	$	263.2	$	4.0	$	31.0
Total Derivatives	$	1,753.9	$	89.1	$	87.9

162

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

	December 31, 2021
			Derivative Assets		Derivative Liabilities
	Notional Amount		Fair Value		Fair Value
	(in millions of dollars)
Designated as Hedging Instruments
Cash Flow Hedges
Foreign Currency Interest Rate Swaps	$	181.3	$	16.2	$	7.0
Fair Value Hedges
Foreign Currency Interest Rate Swaps	498.5		21.9		5.7
Total Designated as Hedging Instruments	$	679.8	$	38.1	$	12.7
Not Designated as Hedging Instruments
Credit Default Swaps	$	11.6	$	—	$	—
Foreign Currency Forwards	41.7		—		—
Foreign Currency Interest Rate Swaps	148.2		1.4		22.3
Total Return Swaps	89.2		—		—
Embedded Derivative in Modified Coinsurance Arrangement	—		—		30.1
Total Not Designated as Hedging Instruments	$	290.7	$	1.4	$	52.4
Total Derivatives	$	970.5	$	39.5	$	65.1

163

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

The following tables summarize the location of gains and losses of derivative financial instruments designated as hedging instruments, as reported in our consolidated statements of income.

	Year Ended December 31, 2022
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,122.2	$	(15.7)	$	188.5
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	200.0		—		2.9
Derivatives Designated as Hedging Instruments	51.0		—		—
Foreign Exchange Contracts:
Hedged items	12.3		(2.3)		—
Derivatives Designated as Hedging Instruments	(0.8)		1.8		—
Forward Benchmark Interest Rate Locks:
Hedged items	0.5		—		—
Gain (Loss) on Fair Value Hedging Relationships
Foreign Exchange Contracts:
Hedged items	11.6		(26.8)		—
Derivatives Designated as Hedging Instruments	7.3		26.8		—

	Year Ended December 31, 2021
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,213.2	$	76.7	$	185.0
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	220.4		2.7		29.2
Derivatives Designated as Hedging Instruments	64.6		2.0		5.0
Foreign Exchange Contracts:
Hedged items	13.0		(0.1)		—
Derivatives Designated as Hedging Instruments	1.8		(0.1)		—
Gain (Loss) on Fair Value Hedging Relationships
Foreign Exchange Contracts:
Hedged items	9.8		(22.3)		—
Derivatives Designated as Hedging Instruments	4.6		22.3		—

164

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

	Year Ended December 31, 2020
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,360.7	$	1,199.1	$	188.2
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	286.1		397.7		29.2
Derivatives Designated as Hedging Instruments	75.9		32.0		1.7
Foreign Exchange Contracts:
Hedged items	12.1		(0.1)		—
Derivatives Designated as Hedging Instruments	2.5		0.1		—
Gain (Loss) on Fair Value Hedging Relationships
Interest Rate Swaps:
Hedged items	—		(0.6)		10.1
Derivatives Designated as Hedging Instruments	—		0.6		(0.9)
Foreign Exchange Contracts:
Hedged items	7.1		23.3		—
Derivatives Designated as Hedging Instruments	2.8		(23.3)		—

165

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 4 - Derivative Financial Instruments - Continued

The following table summarizes the location of gains and losses of derivative financial instruments designated as cash flow hedging instruments, as reported in our consolidated statements of comprehensive income (loss).

		Year Ended December 31
		2022		2021		2020
		(in millions of dollars)
Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives
Forwards		$	(49.8)	$	(0.6)	$	—
Foreign Exchange Contracts		7.4		2.2		(5.4)
	Total	$	(42.4)	$	1.6	$	(5.4)

The following table summarizes the location of gains and losses on our derivatives not designated as hedging instruments, as reported in our consolidated statements of income.

		Year Ended December 31
		2022		2021		2020
		(in millions of dollars)
Net Investment Gain (Loss)
	Credit Default Swaps	$	—	$	(0.3)	$	(0.5)
	Foreign Exchange Contracts	2.7		3.4		(2.0)
	Embedded Derivative in Modified Coinsurance Arrangement	16.2		9.7		(17.0)
	Total	$	18.9	$	12.8	$	(19.5)
Other Expenses
	(Gain) Loss on Total Return Swaps	$	18.9	$	(8.5)	$	—

166

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 5 - Accumulated Other Comprehensive Income (Loss)

Components of our accumulated other comprehensive income (loss), after tax, and related changes are as follows:

	Net Unrealized Gain (Loss) on Securities		Net Gain (Loss) on Hedges		Foreign Currency Translation Adjustment		Unrecognized Pension and Postretirement Benefit Costs		Total
	(in millions of dollars)
Balances at December 31, 2019	$	615.9	$	187.8	$	(281.6)	$	(484.8)	$	37.3
Other Comprehensive Income (Loss) Before Reclassifications	405.6		(5.7)		20.3		(60.8)		359.4
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	46.2		(84.3)		—		15.6		(22.5)
Net Other Comprehensive Income (Loss)	451.8		(90.0)		20.3		(45.2)		336.9
Balances at December 31, 2020	1,067.7		97.8		(261.3)		(530.0)		374.2
Other Comprehensive Income (Loss) Before Reclassifications	(169.9)		14.7		(12.6)		116.3		(51.5)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	64.4		(50.7)		—		17.7		31.4
Net Other Comprehensive Income (Loss)	(105.5)		(36.0)		(12.6)		134.0		(20.1)
Balances at December 31, 2021	962.2		61.8		(273.9)		(396.0)		354.1
Other Comprehensive Income (Loss) Before Reclassifications	(3,009.2)		(30.4)		(115.2)		49.7		(3,105.1)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	23.2		(41.0)		—		12.2		(5.6)
Net Other Comprehensive Income (Loss)	(2,986.0)		(71.4)		(115.2)		61.9		(3,110.7)
Balances at December 31, 2022	$	(2,023.8)	$	(9.6)	$	(389.1)	$	(334.1)	$	(2,756.6)

The net unrealized gain (loss) on securities consists of the following components:

	December 31								Change for the Year Ended December 31
	2022		2021		2020		2019		2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities	$	(2,984.4)	$	5,949.3	$	7,597.6	$	6,364.4	$	(8,933.7)	$	(1,648.3)	$	1,233.2
Deferred Acquisition Costs	11.3		(70.4)		(85.1)		(62.7)		81.7		14.7		(22.4)
Reserves for Future Policy and Contract Benefits	566.7		(4,659.5)		(6,225.6)		(5,803.1)		5,226.2		1,566.1		(422.5)
Reinsurance Recoverable	(18.1)		132.1		200.2		424.7		(150.2)		(68.1)		(224.5)
Income Tax	400.7		(389.3)		(419.4)		(307.4)		790.0		30.1		(112.0)
Total	$	(2,023.8)	$	962.2	$	1,067.7	$	615.9	$	(2,986.0)	$	(105.5)	$	451.8

167

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 5 - Accumulated Other Comprehensive Income (Loss) - Continued

Amounts reclassified from accumulated other comprehensive income (loss) were recognized in our consolidated statements of income as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Net Unrealized Loss on Securities
Net Investment Gain (Loss)
Gain (Loss) on Sales on Securities	$	(24.8)	$	60.8	$	1,279.7
Credit Losses on Fixed Maturity Securities	(4.6)		(9.3)		(53.6)
Loss on Benefits and Change in Reserves for Future Benefits	—		(133.1)		(1,284.5)
	(29.4)		(81.6)		(58.4)
Income Tax Benefit	(6.2)		(17.2)		(12.2)
Total	$	(23.2)	$	(64.4)	$	(46.2)
Net Gain (Loss) on Hedges
Net Investment Income
Gain on Interest Rate Swaps and Forwards	$	51.1	$	60.6	$	74.1
Gain (Loss) on Foreign Exchange Contracts	(1.0)		1.7		2.0
Net Investment Gain (Loss)
Gain on Interest Rate Swaps	—		2.0		32.0
Gain (Loss) on Foreign Exchange Contracts	1.8		(0.1)		0.1
Interest and Debt Expense
Loss on Interest Rate Swaps	—		—		(1.5)
	51.9		64.2		106.7
Income Tax Expense	10.9		13.5		22.4
Total	$	41.0	$	50.7	$	84.3
Unrecognized Pension and Postretirement Benefit Costs
Other Expenses
Amortization of Net Actuarial Loss	$	(15.7)	$	(22.6)	$	(19.8)
Amortization of Prior Service Credit	0.2		0.2		0.1
Curtailment Gain	—		—		(0.1)
	(15.5)		(22.4)		(19.8)
Income Tax Benefit	(3.3)		(4.7)		(4.2)
Total	$	(12.2)	$	(17.7)	$	(15.6)

168

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 6 - Liability for Unpaid Claims and Claim Adjustment Expenses

Changes in the liability for unpaid claims and claim adjustment expenses are as follows:

	2022		2021		2020
	(in millions of dollars)
Balance at January 1	$	23,664.7	$	24,180.2	$	23,076.7
Less Reinsurance Recoverable	8,697.8		8,378.9		2,246.8
Net Balance at January 1	14,966.9		15,801.3		20,829.9
Incurred Related to
Current Year	6,721.3		7,252.6		6,327.8
Prior Years
Interest	595.6		683.4		997.8
All Other Incurred	(646.0)		(719.5)		878.7
Foreign Currency	(235.9)		(23.4)		65.9
Total Incurred	6,435.0		7,193.1		8,270.2
Paid Related to
Current Year	(3,062.9)		(3,263.4)		(2,727.0)
Prior Years	(3,786.0)		(3,774.1)		(4,430.3)
Total Paid	(6,848.9)		(7,037.5)		(7,157.3)
Reserves Ceded Pursuant to Reinsurance Transaction	—		(990.0)		(6,141.5)
Net Balance at December 31	14,553.0		14,966.9		15,801.3
Plus Reinsurance Recoverable	8,279.8		8,697.8		8,378.9
Balance at December 31	$	22,832.8	$	23,664.7	$	24,180.2

The majority of the net balances are related to disability claims with long-tail payouts on which interest earned on assets backing liabilities is an integral part of pricing and reserving. Interest accrued on prior year reserves has been calculated on the opening reserve balance less one-half of the year’s claim payments relative to prior years at our average reserve discount rate for the respective periods.

"Incurred Related to Prior Years - All Other Incurred" shown in the preceding chart reflects the current year development of the prior year unpaid claims and claim adjustment expenses. For all years presented this line item includes reserve assumption updates as discussed in the following paragraphs. For 2021 and 2020, this amount includes the increase in benefits and change in reserves for future benefits resulting from the realization of previously unrealized investment gains and losses as a result of both phases of the Closed Block individual disability reinsurance transaction. Excluding the reserve assumption updates and impacts from the reinsurance transaction, the variability exhibited year over year is primarily caused by the level of claim resolutions in the period relative to the long-term expectations reflected in the reserves, primarily in our Unum US group long-term disability and Closed Block long-term care product lines. Our claim resolution rate assumption used in determining reserves is our expectation of the resolution rate we will experience over the life of the block of business and will vary from actual experience in any one period, both favorably and unfavorably.

169

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 6 - Liability for Unpaid Claims and Claim Adjustment Expenses - Continued

Reserve Assumption Updates

During 2022, we completed our annual review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during 2022, we updated our reserve assumptions to reflect our current estimate of future benefits obligations and determined that our claim reserves in our Unum US group long-term disability product line and our waiver of premium reserves for our Unum US group life product line should be reduced by $121.0 million and $34.0 million, respectively, due primarily to sustained improvement in claim recovery trends since our last assumption update, partially offset by lower social security benefit offsets for our group long-term disability product line. As a result, a reduction of approximately $155.0 million, which can be primarily attributed to prior year incurred claims, impacts the results shown in the preceding chart. We also increased our claim reserves for the reinsured portion of our Closed Block individual disability product line by $193.9 million resulting primarily from updates to mortality assumptions for the advanced age portion of our claimant population. This increase is entirely related to the block that was ceded as a part of the Closed Block individual disability reinsurance transaction with Commonwealth Annuity and Life Insurance Company (Commonwealth). As a result, the increase in the Closed Block individual disability claim reserves had no impact on the net activity shown in the preceding chart.

During 2021, we completed our annual review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during 2021, we updated our reserve assumptions and determined that our claim reserves should be reduced by $215.0 million in our Unum US group long-term disability product line due primarily to sustained improvement in claim recovery trends since our last assumption update. We also increased our claim reserves for our Closed Block long-term care and individual disability product lines by $2.1 million and $6.4 million, respectively, to reflect our current estimate of future benefit obligations. As a result, a net reduction of approximately $206.5 million, which can be primarily attributed to prior year incurred claims, impacts the results shown in the preceding chart. We also increased policy reserves in our Closed Block group pension product line by $25.1 million as a result of this review which did not affect the results shown in the preceding chart.

During 2020, we completed our annual review of policy reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during 2020, we updated our interest rate and premium rate increase reserve assumptions and determined that our Closed Block long-term care policy and claim reserves should be increased by $151.5 million, of which $7.0 million was related to our liability for unpaid claims and claims adjustment expenses, which can be primarily attributed to prior year incurred claims, thereby impacting the results shown in the preceding chart. We also increased policy reserves in our Closed Block group pension product line by $17.5 million as a result of this review which did not affect the results shown in the preceding chart.

Closed Block Individual Disability Reinsurance Transaction

In connection with the first phase of the Closed Block individual disability reinsurance transaction that closed in December 2020, we recorded a reinsurance recoverable of $6,141.5 million representing the ceded reserves related to the cohort of policies on claim status as of July 1, 2020 (DLR cohort) and an increase in benefits and change in reserves for future benefits of $1,284.5 million resulting from the realization of previously unrealized investment gains and losses recorded in accumulated other comprehensive income (loss). In connection with the second phase of the Closed Block individual disability transaction that closed in March 2021, we recorded a reinsurance recoverable of $990.0 million representing the ceded reserves related to the cohort of policies on claim status as of January 1, 2021 and an increase in benefits and change in reserves for future benefits of $133.1 million resulting from the realization of previously unrealized investment gains and losses recorded in accumulated other comprehensive income (loss). These impacts are reflected in the chart shown above and the reconciliation shown below. See Note 12 for further discussion regarding the total impacts of the Closed Block individual disability reinsurance transaction.

170

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 6 - Liability for Unpaid Claims and Claim Adjustment Expenses - Continued

Reconciliation

A reconciliation of policy and contract benefits and reserves for future policy and contract benefits as reported in our consolidated balance sheets to the liability for unpaid claims and claim adjustment expenses is as follows:

	December 31
	2022		2021		2020
	(in millions of dollars)
Policy and Contract Benefits	$	1,839.8	$	1,907.7	$	1,855.4
Reserves for Future Policy and Contract Benefits	42,330.2		48,007.5		49,653.0
Total	44,170.0		49,915.2		51,508.4
Less:
Life Reserves for Future Policy and Contract Benefits	8,428.5		8,457.1		8,371.7
Accident and Health Active Life Reserves	13,475.4		13,133.9		12,730.9
Adjustment Related to Unrealized Investment Gains (Losses)	(566.7)		4,659.5		6,225.6
Liability for Unpaid Claims and Claim Adjustment Expenses	$	22,832.8	$	23,664.7	$	24,180.2

The adjustment related to unrealized investment gains and losses reflects the changes that would be necessary to policyholder liabilities if the unrealized investment gains and losses related to the corresponding available-for-sale securities had been realized. Changes in this adjustment are reported as a component of other comprehensive income or loss.

171

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 7 - Income Tax

Total income tax expense (benefit) is allocated as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Net Income	$	317.2	$	238.8	$	171.0
Stockholders' Equity - Accumulated Other Comprehensive Income (Loss)
Change in Net Unrealized Gain (Loss) on Securities Before Adjustment	(1,890.8)		(346.9)		250.2
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance	1,100.8		316.8		(138.2)
Change in Net Gain (Loss) on Hedges	(19.2)		(9.8)		(23.8)
Change in Foreign Currency Translation Adjustment	(0.1)		4.2		(4.3)
Change in Unrecognized Pension and Postretirement Benefit Costs	18.9		42.1		(34.8)
Total	$	(473.2)	$	245.2	$	220.1

A reconciliation of the income tax provision at the U.S. federal statutory rate to the income tax rate as reported in our consolidated statements of income is as follows:

	Year Ended December 31
	2022		2021		2020
Statutory Income Tax	21.0	%	21.0	%	21.0	%
Net Operating Loss Carryback	—		(0.7)		(3.8)
Tax Exempt Income	(1.1)		(1.1)		(0.8)
Tax Credits	(0.3)		(0.9)		(1.3)
Policyholder Reserves	(1.9)		2.4		0.7
Other Items, Net	1.7		1.8		1.9
Effective Tax	19.4	%	22.5	%	17.7	%

172

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 7 - Income Tax - Continued

Our net deferred tax asset (liability) consists of the following.

	December 31
	2022		2021
	(in millions of dollars)
Deferred Tax Asset
Invested Assets	$	664.9	$	—
Reserves	—		889.7
Employee Benefits	158.3		176.6
Other	34.4		57.5
Gross Deferred Tax Asset	857.6		1,123.8
Less: Valuation Allowance	10.3		12.7
Net Deferred Tax Asset	847.3		1,111.1
Deferred Tax Liability
Deferred Acquisition Costs	113.1		134.9
Fixed Assets	48.9		71.1
Invested Assets	—		1,144.9
Reserves	43.2		—
Cost of Reinsurance	156.8		171.6
Other	44.7		47.0
Gross Deferred Tax Liability	406.7		1,569.5
Net Deferred Tax Asset (Liability)	$	440.6	$	(458.4)

173

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 7 - Income Tax - Continued

Our consolidated statements of income include amounts subject to both domestic and foreign taxation. The income and related tax expense (benefit) are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Income Before Tax
Domestic	$	1,492.8	$	957.0	$	924.7
Foreign	138.6		106.0		39.3
Total	$	1,631.4	$	1,063.0	$	964.0
Current Tax Expense (Benefit)
Federal	$	306.5	$	180.7	$	(98.4)
State and Local	12.7		2.6		1.5
Foreign	154.3		29.5		(19.7)
Total	473.5		212.8		(116.6)
Deferred Tax Expense (Benefit)
Federal	20.9		13.3		250.5
State and Local	1.1		(2.2)		1.0
Foreign	(178.3)		14.9		36.1
Total	(156.3)		26.0		287.6
Total Tax Expense	$	317.2	$	238.8	$	171.0

On June 10, 2021, the Finance Act 2021 was enacted, resulting in a U.K. tax increase from 19 percent to 25 percent, effective April 1, 2023, which resulted in $24.2 million of additional tax expense in operating earnings for the revaluation of our deferred tax assets and liabilities in 2021. On July 22, 2020, the Finance Act 2020 was enacted, resulting in a U.K. tax rate increase from 17 percent to 19 percent, retroactively effective April 1, 2020, which resulted in $9.3 million of additional tax expense for the revaluation of our deferred tax assets and liabilities in 2020. In addition, we recorded a tax benefit of $36.5 million in 2020 for tax losses that were carried back to a tax year in which the U.S. statutory tax rate was 35 percent pursuant to the Coronavirus Aid, Relief, and Economic Security Act (CARES Act).

As of December 31, 2022, our plans for future repatriations of cash from our foreign subsidiaries can include no more than the amount of capital above that which is required by U.K. regulatory capital requirements.  The remainder of our investment in our foreign subsidiaries is indefinitely reinvested.

Our consolidated statements of income include the following changes in unrecognized tax benefits.

	December 31
	2022		2021		2020
	(in millions of dollars)
Balance at Beginning of Year	$	198.8	$	219.7	$	241.0
Decreases for Tax Positions Related to Prior Years	(21.0)		(20.9)		(21.0)
Lapse of the Applicable Statute of Limitations	(0.4)		—		(0.3)
Balance at End of Year	177.4		198.8		219.7
Less Tax Attributable to Temporary Items Included Above	(63.5)		(84.7)		(105.9)
Total Unrecognized Tax Benefits That if Recognized Would Affect the Effective Tax Rate	$	113.9	$	114.1	$	113.8

174

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 7 - Income Tax - Continued

In 2018, we recorded $261.1 million gross unrecognized tax benefits for a policyholder reserves position taken on our 2017 federal tax return, which if recognized, would decrease our tax expense by $112.9 million. The balances of unrecognized tax benefits for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility are $63.5 million at December 31, 2022, $84.7 million at December 31, 2021, and $105.9 million at December 31, 2020. It is reasonably possible that this item could reverse in the next 12 months following review by the IRS. We recognize interest expense and penalties, if applicable, related to unrecognized tax benefits in tax expense. We recognized $7.8 million, $5.5 million, and $7.8 million of interest expense related to unrecognized tax benefits during 2022, 2021, and 2020, respectively. The liability for net interest expense on uncertain tax positions was approximately $34.0 million, $26.2 million, and $20.6 million as of December 31, 2022, 2021, and 2020, respectively.

We file federal and state income tax returns in the United States and in foreign jurisdictions. Tax year 2017 and tax years subsequent to 2018 remain subject to examination by the IRS. All major foreign jurisdictions remain subject to examination for tax years subsequent to 2020 with the exception of Poland for which tax years subsequent to 2016 remain subject to examination. We believe sufficient provision has been made for all potential adjustments for years that are not closed by the statute of limitations in all major tax jurisdictions and that any such adjustments would not have a material adverse effect on our financial position, liquidity, or results of operations.

We file state income tax returns in nearly every state in the United States. Tax years subsequent to 2016 remain subject to examination depending on the statute of limitation established by the various states, which is generally three to four years.

As of December 31, 2022, we have no federal net operating loss or capital loss carryforwards. We have net operating loss carryforwards for state and local income tax of approximately $187.6 million, most of which is expected to expire unused between 2023 and 2042.

We record valuation allowances to reduce deferred tax assets to the amount that is more likely than not to be realized.  Our valuation allowance was $10.3 million and $12.7 million at December 31, 2022 and 2021, respectively, the majority of which related to our cumulative deferred state income tax benefits. The de minimis remaining amount of our valuation allowance relates to unrealized tax losses on buildings which we own and occupy in the U.K. We recorded a decrease in our valuation allowance of $2.4 million during 2022 and a decrease of $1.8 million in 2021, primarily in other comprehensive income.

Total income taxes paid during 2022 were $375 million. Total income taxes refunded during 2021 were $51 million. Total income taxes paid during 2020 were $200 million.

175

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 8 - Debt

Debt consists of the following:

			December 31
			2022		2021
	Interest Rates	Maturities	(in millions of dollars)
Outstanding Principal
Senior Notes issued 1998	6.750 - 7.250%	2028	$	335.8	$	335.8
Senior Notes issued 2002	7.375%	2032	39.5		39.5
Senior Notes issued 2012 and 2016	5.750%	2042	500.0		500.0
Senior Notes issued 2014	4.000%	2024	—		350.0
Senior Notes issued 2015	3.875%	2025	275.0		275.0
Senior Notes issued 2019	4.000%	2029	400.0		400.0
Senior Notes issued 2019	4.500%	2049	450.0		450.0
Senior Notes issued 2021	4.125%	2051	600.0		600.0
Medium-term Notes issued 1990 - 1996	7.000 - 7.190%	2023 - 2028	18.5		20.5
Junior Subordinated Debt Securities issued 1998	7.405%	2038	189.7		203.7
Junior Subordinated Debt Securities issued 2018	6.250%	2058	300.0		300.0
Term Loan issued 2022	Variable	2027	350.0		—
Less:
Unamortized Net Premium			2.5		2.3
Unamortized Debt Issuance Costs			(33.2)		(34.6)
Total Long-term Debt			$	3,427.8	$	3,442.2
Short-term Debt
Medium-term Notes Issued 1990	7.000%	2023	2.0		—
Total Debt			$	3,429.8	$	3,442.2

Long-term debt is comprised of our unsecured notes, which consist of our senior notes, medium-term notes, and term loan facility, and rank highest in priority, followed by our junior subordinated debt securities. The senior notes are callable and may be redeemed, in whole or in part, at any time. The term loan facility is callable and may be redeemed at par at any time. The medium-term notes are non-callable and the junior subordinated debt securities are callable under limited, specified circumstances.

The aggregate contractual principal maturities are $2.0 million in 2023, $275.0 million in 2025, $350.0 million in 2027 and $2,833.5 million thereafter.

Unsecured Notes

In August 2022, we redeemed $350.0 million aggregate principal amount of our 4.000% senior notes due 2024, for which we incurred costs of $3.0 million and has been recorded within cost related to the early retirement of debt in the consolidated statements of income and is included within our Corporate segment.

In June 2021, we issued $600.0 million of 4.125% senior notes due 2051. The notes are callable at or above par and rank equally in the right of payment with all of our other unsecured and unsubordinated debt.

In September 2020, our $400.0 million 5.625% senior unsecured notes matured.

176

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 8 - Debt- Continued

In May 2020, we issued $500.0 million of 4.500% senior notes due 2025. In June 2021, we purchased and retired these senior notes, for which we incurred costs of $67.3 million and has been recorded within cost related to the early retirement of debt in the consolidated statements of income and is included within our Corporate segment.

Term Loan Facility

In August 2022, we entered into a five-year $350.0 million senior unsecured delayed draw term loan facility with a syndicate of lenders. Also in August 2022 , we drew the entire amount of the term loan facility, which is scheduled to mature in August 2027. Amounts due under the term loan facility incur interest based on the prime rate, the federal funds rate, or the Secured Overnight Financing Rate (SOFR). The proceeds from the term loan facility were used to redeem $350.0 million aggregate principal amount of our 4.000% senior notes due 2024.

Borrowings under the term loan facility are subject to financial covenants, negative covenants, and events of default that are customary. The term loan facility includes financial covenants based on our leverage ratio and consolidated net worth.

Senior Secured Notes

In 2007, Northwind Holdings, LLC (Northwind Holdings), a wholly-owned subsidiary of Unum Group, issued $800.0 million of insured, senior secured notes, bearing interest at a floating rate equal to the three month LIBOR plus 0.78% (the Northwind notes) in a private offering.

Northwind Holdings made periodic principal payments on the Northwind notes of $45.0 million in 2020. In December 2020, Northwind Holdings redeemed the remaining $35.0 million of principal on the Northwind notes, and was released of any contractual collateral requirements.

Fair Value Hedges

As of December 31, 2019, we had $250.0 million notional amount of an interest rate swap which effectively converted certain of our unsecured senior notes into floating rate debt. Under this agreement, we received a fixed rate of interest and paid a variable rate of interest, based off of three-month LIBOR. During 2020, the $250.0 million notional amount of the interest rate swap matured in conjunction with the maturity of the hedged debt. See Note 4 for further information on the interest rate swap.

Junior Subordinated Debt Securities

In 1998, Provident Financing Trust I (the Trust), a 100 percent-owned finance subsidiary of Unum Group, issued $300.0 million of 7.405% capital securities due 2038 in a public offering. These capital securities are fully and unconditionally guaranteed by Unum Group, have a liquidation value of $1,000 per capital security, and have a mandatory redemption feature under certain circumstances. In connection with the capital securities offering, Unum Group issued to the Trust 7.405% junior subordinated deferrable interest debentures due 2038. The Trust is a variable interest entity of which Unum Group is not the primary beneficiary. Accordingly, the capital securities issued by the Trust are not included in our consolidated financial statements and our liability represents the junior subordinated debt securities owed to the trust which is recorded in long-term debt. The sole assets of the Trust are the junior subordinated debt securities. The retirement of any liquidation amount regarding the capital securities by the Trust results in a corresponding retirement of principal amount of the junior subordinated debt securities.

In September 2022, pursuant to privately negotiated transactions, we purchased, and the Trust retired, $14.0 million aggregate liquidation amount of the Trust's 7.405% capital securities due 2038, which resulted in the reduction of a corresponding principal amount of our 7.405% junior subordinated debt securities due 2038 then held by the Trust. We incurred costs of $1.2 million related to the early retirement of the junior subordinated debt securities.

Interest Paid

Interest paid on long-term and short-term debt and related securities during 2022, 2021, and 2020 was $172.9 million, $181.6 million, and $178.1 million, respectively.

177

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 8 - Debt- Continued

Credit Facilities

In April 2022, we amended and restated our existing credit agreement providing for a five-year $500.0 million senior unsecured revolving credit facility with a syndicate of lenders. The credit facility, which was previously set to expire in April 2024, was extended through April 2027. We may request that the lenders’ aggregate commitments of $500.0 million under the facility be increased by up to an additional $200.0 million. Certain of our traditional U.S. life insurance subsidiaries, Unum Life Insurance Company of America (Unum America), Provident Life and Accident Insurance Company (Provident), and Colonial Life & Accident Insurance Company, joined the agreement and may borrow under the credit facility, and we can elect to add additional insurance subsidiaries to the facility at any later date. Any obligation of a subsidiary under the credit facility is several only and not joint and is subject to an unconditional guarantee by Unum Group. We may also request, on up to two occasions, that the lenders' commitment termination dates be extended by one year. The credit facility also provides for the issuance of letters of credit subject to certain terms and limitations. The credit facility provides for borrowings at an interest rate based on the prime rate, the federal funds rate or the SOFR. At December 31, 2022, there were no borrowed amounts outstanding under the credit facility and letters of credit totaling $0.4 million had been issued.

In the third quarter of 2021, we terminated our three-year, $100.0 million unsecured revolving credit facility, which was originally set to expire in April 2022. There were no letters of credit issued from the credit facility and there were no borrowed amounts outstanding at the time of termination. Also in the third quarter of 2021, we entered into a new five-year, £75 million unsecured standby letter of credit facility with the same syndicate of lenders, pursuant to which a syndicated letter of credit was issued in favor of Unum Limited (as beneficiary), our U.K. insurance subsidiary, and is available for drawings up to £75 million until its scheduled expiration in July 2026. The credit facility provides for borrowings at an interest rate based either on the prime rate or federal funds rate. No amounts have been drawn on the letter of credit. If drawings are made in the future, we may elect to borrow such amounts from the lenders pursuant to term loans made under the credit facility.

Borrowings under the credit facilities are subject to financial covenants, negative covenants, and events of default that are customary. The two primary financial covenants include limitations based on our leverage ratio and consolidated net worth. We are also subject to covenants that limit subsidiary indebtedness.

Facility Agreement for Contingent Issuance of Senior Notes

During November 2021, we entered into a 20-year facility agreement with a Delaware trust in connection with the sale by the trust of $400.0 million of pre-capitalized trust securities in a Rule 144A private placement. The trust invested the proceeds from the sale of the trust securities in a portfolio of principal and interest strips of U.S. Treasury securities. The facility agreement provides us the right to issue and sell to the trust, on one or more occasions, up to an aggregate principal amount outstanding at any one time of $400.0 million of our 4.046% senior notes which would be due August 15, 2041 in exchange for U.S. Treasury securities held by the trust. These senior notes will not be issued unless and until the issuance right is exercised. In return, we will pay a semi-annual facility fee to the trust at a rate of 2.225% per year on the unexercised portion of the maximum amount of senior notes that we could issue and sell to the trust and we will reimburse the trust for its expenses. We may also direct the trust to grant the right to exercise the issuance right with respect to all or a designated amount of the senior notes to one or more assignees (who are our consolidated subsidiaries or persons to whom we have an obligation).

The issuance right will be exercised automatically in full upon our failure to make certain payments to the trust, such as paying the facility fee or reimbursing the trust for its expenses, if the failure to pay is not cured within 30 days, or upon certain bankruptcy events involving the company. We are also required to exercise the issuance right in full if our consolidated stockholders’ equity, excluding accumulated other comprehensive income, falls below $2.0 billion, subject to adjustment from time to time in certain cases, and upon certain other events described in the facility agreement.

Prior to any involuntary exercise of the issuance right, we have the right to repurchase any or all of the 4.046% senior notes then held by the trust in exchange for U.S. Treasury securities. We may redeem any outstanding 4.046% senior notes, in whole or in part, prior to their maturity. Prior to February 15, 2041, the redemption price will equal the greater of par or a make-whole redemption price. On or after February 15, 2041, any outstanding 4.046% senior notes may be redeemed at par.

178

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans

Defined Benefit Pension and Other Postretirement Benefit (OPEB) Plans

We sponsor several defined benefit pension and OPEB plans for our employees, including non-qualified pension plans. The U.S. qualified and non-qualified defined benefit pension plans comprise the majority of our total benefit obligation and benefit cost. We maintain a separate defined benefit plan for eligible employees in our U.K. operation. The U.S. defined benefit pension plans were closed to new entrants on December 31, 2013, the OPEB plan was closed to new entrants on December 31, 2012, and the U.K. plan was closed to new entrants on December 31, 2002.

Amortization Period of Actuarial Gain or Loss and Prior Service Cost or Credit

Because all participants in the U.S. and U.K. pension plans are considered inactive, we amortize the net actuarial gain or loss and prior service credit or cost for these plans over the average remaining life expectancy of the plans. As of December 31, 2022, the estimate of the average remaining life expectancy of the plans was approximately 24 years for the U.S. plan and 28 years for the U.K. plan. For the OPEB plan, we amortize the net actuarial gain or loss and prior service credit or cost for this plan over the average remaining future working lifetime for active participants in the plan. As of December 31, 2022, the estimate of the average remaining future working lifetime was approximately 2 years for the OPEB plan.

The following table provides the changes in the benefit obligation and fair value of plan assets and the funded status of the plans.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Change in Benefit Obligation
Benefit Obligation at Beginning of Year	$	2,207.5	$	2,277.2	$	278.3	$	300.0	$	110.3	$	120.5
Service Cost	7.7		9.6		—		—		—		—
Interest Cost	67.2		65.0		5.0		4.2		3.0		3.0
Plan Participant Contributions	—		—		—		—		0.1		0.1
Actuarial Gain (1)	(604.1)		(57.9)		(92.4)		(18.0)		(19.4)		(3.0)
Benefits and Expenses Paid	(92.8)		(86.4)		(5.4)		(5.2)		(10.1)		(10.3)
Change in Foreign Exchange Rates	—		—		(27.6)		(2.7)		—		—
Benefit Obligation at End of Year	$	1,585.5	$	2,207.5	$	157.9	$	278.3	$	83.9	$	110.3
Accumulated Benefit Obligation at December 31	$	1,585.5	$	2,207.5	$	158.0	$	276.5	N/A		N/A
Change in Fair Value of Plan Assets
Fair Value of Plan Assets at Beginning of Year	$	1,801.7	$	1,710.9	$	303.7	$	294.1	$	9.0	$	9.3
Actual Return on Plan Assets	(410.6)		167.6		(128.4)		18.0		0.1		0.1
Employer Contributions	10.0		9.6		—		—		9.4		9.8
Plan Participant Contributions	—		—		—		—		0.1		0.1
Benefits and Expenses Paid	(92.8)		(86.4)		(5.4)		(5.2)		(10.1)		(10.3)
Change in Foreign Exchange Rates	—		—		(29.4)		(3.2)		—		—
Fair Value of Plan Assets at End of Year	$	1,308.3	$	1,801.7	$	140.5	$	303.7	$	8.5	$	9.0
Underfunded (Overfunded) Status	$	277.2	$	405.8	$	17.4	$	(25.4)	$	75.4	$	101.3

(1) The actuarial gains recognized in 2022 and 2021 for the U.S., OPEB, and U.K. plans were primarily driven by increases in the discount rate assumption.

179

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

The amounts recognized in our consolidated balance sheets for our pension and OPEB plans at December 31, 2022 and 2021 are as follows.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Current Liability	$	8.8	$	8.4	$	—	$	—	$	1.1	$	1.4
Noncurrent Liability	268.4		397.4		17.4		—		74.3		99.9
Noncurrent Asset	—		—		—		(25.4)		—		—
Underfunded (Overfunded) Status	$	277.2	$	405.8	$	17.4	$	(25.4)	$	75.4	$	101.3
Unrecognized Pension and Postretirement Benefit Costs
Net Actuarial Gain (Loss)	$	(517.8)	$	(621.8)	$	(83.7)	$	(42.9)	$	31.6	$	13.6
Prior Service Credit (Cost)	(0.6)		(0.6)		(0.2)		(0.2)		2.5		2.7
	(518.4)		(622.4)		(83.9)		(43.1)		34.1		16.3
Income Tax	213.5		239.2		19.5		9.1		1.1		4.9
Total Included in Accumulated Other Comprehensive Income (Loss)	$	(304.9)	$	(383.2)	$	(64.4)	$	(34.0)	$	35.2	$	21.2

The following table provides the changes recognized in other comprehensive income for the years ended December 31, 2022 and 2021.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Accumulated Other Comprehensive Income (Loss) at Beginning of Year	$	(383.2)	$	(494.6)	$	(34.0)	$	(54.7)	$	21.2	$	19.3
Net Actuarial Gain (Loss)
Amortization	16.3		21.3		0.4		1.3		(1.0)		—
All Other Changes	87.7		124.8		(41.2)		26.3		19.0		2.6
Prior Service Credit (Cost)
Amortization	—		—		—		—		(0.2)		(0.2)
Change in Income Tax	(25.7)		(34.7)		10.4		(6.9)		(3.8)		(0.5)
Accumulated Other Comprehensive Income (Loss) at End of Year	$	(304.9)	$	(383.2)	$	(64.4)	$	(34.0)	$	35.2	$	21.2

Plan Assets

The objective of our U.S. pension and OPEB plans is to maximize long-term return, within acceptable risk levels, in a manner that is consistent with the fiduciary standards of the Employee Retirement Income Security Act (ERISA), while maintaining sufficient liquidity to pay current benefits and expenses.

Our U.S. qualified defined benefit pension plan assets include a diversified blend of domestic, international, global, and emerging market equity securities, fixed income securities, opportunistic credit securities, real estate investments, alternative investments, and cash equivalents.  Equity securities are comprised of funds and individual securities that are benchmarked against the respective indices specified below. International and global equity funds may allocate a certain percentage of assets to forward currency contracts. Fixed income securities include funds and U.S. government and agency asset-backed securities, treasury futures contracts, corporate investment-grade bonds, private placement securities, and bonds issued by states or other municipalities. Opportunistic credits consist of investments in funds that hold varied fixed income investments purchased at

180

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

depressed values with the intention to later sell those investments for a gain. Real estate investments consist primarily of funds that hold commercial real estate investments. Alternative investments, which include private equity direct investments and private equity funds of funds, utilize proprietary strategies that are intended to have a low correlation to the U.S. stock market. Prohibited investments include, but are not limited to, unlisted securities, options, short sales, and investments in securities issued by Unum Group or its affiliates. The invested asset classes, asset types, and benchmark indices for our U.S. qualified defined benefit pension plan is as follows. We target approximately 38 percent to equity securities, 30 percent to fixed income securities, and 32 percent to opportunistic credits, alternative, and real estate investments.

Asset Class	Asset Type	Benchmark Indices
Equity Securities	Collective funds; Individual holdings	Morgan Stanley Capital International (MSCI) World Index
Fixed Income	Collective funds; Individual holdings	Bloomberg Barclays Long Corporate Index; Custom Index
Opportunistic Credits	Collective fund	Custom Index
Real Estate	Collective fund	Custom Index
Alternative Investments (Private Equity)	Fund of funds; Direct investments	Custom Index

The investment strategy for our U.K. pension includes increasing the funded ratio in a risk-controlled manner where the risk taken in the investment strategy reduces as the funded status of the plan increases. Assets for our U.K. pension plan are invested in a portfolio of diversified growth assets as well as a portfolio of fixed income and index-linked securities. The portfolio of growth assets consists of funds invested primarily in global equity securities, investment-grade and below-investment-grade fixed interest securities, including emerging market securities as well as diversified alternatives. The portfolio of fixed interest and index-linked securities are invested primarily in leveraged interest rate and inflation-linked gilt funds of varying durations designed to broadly match the interest rate and inflation sensitivities of the plan's liabilities. At December 31, 2022, our target allocation was approximately 50 percent to growth assets and 50 percent to fixed interest and index-linked securities. When the funded status of the plan increases, we utilize a de-risking framework whereby the allocation to fixed interest and index-linked securities increases and the allocation to growth assets is lowered. Simultaneously, the hedge ratio of interest rate and inflation risk will increase with the intention of reducing funding level volatility. There are no categories of investments that are specifically prohibited by the U.K. plan, but there are general guidelines that ensure prudent investment action is taken. Such guidelines include the prevention of the plan from using derivatives for speculative purposes and limiting the concentration of risk in any one type of investment.

Assets for the OPEB plan are invested in life insurance contracts issued by one of our insurance subsidiaries. The assets support life insurance benefits payable to certain former retirees covered under the OPEB plan. The terms of these contracts are consistent in all material respects with those the subsidiary offers to unaffiliated parties that are similarly situated. There are no categories of investments specifically prohibited by the OPEB plan.

We believe our investment portfolios are well diversified by asset class and sector, with no undue risk concentrations in any one category.

181

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

The categorization of fair value measurements by input level for the invested assets in our U.S. pension plans is shown below. The carrying values of investment-related receivables and payables approximate fair value due to the short-term nature of the securities and are not included in the following chart. Investments valued using net asset value (NAV) as a practical expedient are not required to be categorized by input level, but these investments are included as follows to reconcile to total invested assets. Certain prior year amounts were reclassified to conform to current year presentation.

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Equity Securities:
Global	$	57.4	$	—	$	—	$	405.7	$	463.1
Fixed Income Securities:
U.S. Government and Agencies1	194.0		21.7		—		—		215.7
Corporate	—		—		—		129.6		129.6
Non-U.S. Emerging Markets	—		—		—		54.0		54.0
Opportunistic Credits	—		—		—		132.3		132.3
Real Estate	—		—		—		164.2		164.2
Alternative Investments:
Private Equity Direct Investments	—		—		—		74.5		74.5
Private Equity Funds of Funds	—		—		—		47.6		47.6
Cash Equivalents	20.5		—		—		—		20.5
Total Invested Assets	$	271.9	$	21.7	$	—	$	1,007.9	$	1,301.5

1 U.S. Government and Agencies Fixed Income Securities includes derivative assets.

182

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

	December 31, 2021
	Quoted Prices in Active  Markets for  Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Equity Securities:
U.S. Large Cap	$	—	$	—	$	—	$	144.9	$	144.9
U.S. Small Cap	32.8		—		—		30.5		63.3
Global	—		—		—		388.7		388.7
Emerging Markets	—		—		—		59.8		59.8
Fixed Income Securities:
U.S. Government and Agencies1	419.3		—		—		—		419.3
Corporate	—		—		—		103.3		103.3
Opportunistic Credits	—		—		—		212.5		212.5
Real Estate	—		—		—		247.1		247.1
Alternative Investments:
Private Equity Direct Investments	—		—		—		80.4		80.4
Private Equity Funds of Funds	—		—		—		50.5		50.5
Cash Equivalents	31.9		—		—		—		31.9
Total Invested Assets	$	484.0	$	—	$	—	$	1,317.7	$	1,801.7

1 U.S. Government and Agencies Fixed Income Securities includes derivative assets.

Level 1 investments consist of individual holdings that are valued based on unadjusted quoted prices from active markets for identical securities. Level 2 investments consist of individual holdings that are valued using either directly or indirectly observable inputs other than quoted prices from active markets.

Certain equity, opportunistic credit, fixed-income securities, and real estate investments are valued based on the NAV of the underlying holdings as of the reporting date. We made no adjustments to the NAV for 2022 or 2021. These investments have no unfunded commitments and no specific redemption restrictions.

Alternative investments are valued based on NAV in a period ranging from one month to one quarter in arrears. We evaluate the need for adjustments to the NAV based on market conditions and discussions with fund managers in the period subsequent to the valuation date and prior to issuance of the financial statements. We made no adjustments to the NAV for 2022 or 2021. The private equity direct investments and private equity funds of funds generally cannot be redeemed by investors. Distributions of capital from the sale of underlying fund assets may occur at any time, but are generally concentrated between five and eight years from the formation of the fund. At December 31, 2022 and 2021, these investments had unfunded commitments of $24.5 million and $28.5 million, respectively.

183

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

The categorization of fair value measurements by input level for the invested assets in our U.K. pension plan is shown below. Investments valued using NAV as a practical expedient are not required to be categorized by input level, but these investments are included as follows to reconcile to total invested assets.

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Diversified Growth Assets	$	32.3	$	—	$	—	$	8.3	$	40.6
Fixed Income and Index-linked Securities	70.6		—		—		—		70.6
Alternative Investments	—		—		—		28.1		28.1
Cash Equivalents	1.9		—		—		—		1.9
Total Invested Assets	$	104.8	$	—	$	—	$	36.4	$	141.2

	December 31, 2021
	Quoted Prices in Active  Markets for  Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Diversified Growth Assets	$	113.1	$	—	$	—	$	44.2	$	157.3
Fixed Income and Index-linked Securities	124.1		—		—		—		124.1
Alternative Investments	—		—		—		18.2		18.2
Cash Equivalents	4.1		—		—		—		4.1
Total Invested Assets	$	241.3	$	—	$	—	$	62.4	$	303.7

The level 1 diversified growth assets and fixed interest and index-linked securities consist of individual funds that are valued based on unadjusted quoted prices from active markets for identical securities. Certain diversified growth assets were valued based on the NAV of the underlying holdings as of the reporting date. Alternative investments are valued based on NAV one quarter in arrears. We evaluate the need for adjustments to the NAV of the alternative investments based on an evaluation of cash flows in the period subsequent to the valuation date and prior to issuance of the financial statements. We made no adjustments to the NAV for 2022 or 2021. These investments generally cannot be redeemed by investors. These investments had unfunded commitments at December 31, 2022 and 2021 of $17.3 million and $28.1 million, respectively.

184

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

The categorization of fair value measurements by input level for the assets in our OPEB plan is as follows:

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in millions of dollars)
Assets
Life Insurance Contracts	$	—	$	—	$	8.5	$	8.5

	December 31, 2021
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in millions of dollars)
Assets
Life Insurance Contracts	$	—	$	—	$	9.0	$	9.0

The fair value is represented by the actuarial present value of future cash flows of the contracts.

Changes in our OPEB plan assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2022 and 2021 are as follows:

	Year Ended December 31, 2022
	Beginning of Year		Actual Return on Plan Assets		Contributions		Net Benefits and Expenses Paid		End of Year
	(in millions of dollars)
Life Insurance Contracts	$	9.0	$	0.1	$	9.5	$	(10.1)	$	8.5

	Year Ended December 31, 2021
	Beginning of Year		Actual Return on Plan Assets		Contributions		Net Benefits and Expenses Paid		End of Year
	(in millions of dollars)
Life Insurance Contracts	$	9.3	$	0.1	$	9.9	$	(10.3)	$	9.0

For the years ended December 31, 2022 and 2021, the actual return on plan assets relates solely to investments still held at the reporting date. There were no transfers into or out of Level 3 during 2022 or 2021.

185

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

Measurement Assumptions

We use a December 31 measurement date for each of our plans. The weighted average assumptions used in the measurement of our benefit obligations as of December 31 and our net periodic benefit costs for the years ended December 31 are as follows:

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
Benefit Obligations
Discount Rate	5.70	%	3.10	%	4.80	%	2.00	%	5.70	%	2.90	%
Rate of Compensation Increase	N/A		N/A		2.50	%	2.90	%	N/A		N/A
Net Periodic Benefit Cost
Discount Rate	3.10	%	2.90	%	2.00	%	1.40	%	2.90	%	2.60	%
Expected Return on Plan Assets	6.00	%	6.00	%	4.20	%	3.50	%	5.75	%	5.75	%
Rate of Compensation Increase	N/A		N/A		2.90	%	2.80	%	N/A		N/A

We set the discount rate assumption annually for each of our retirement-related benefit plans at the measurement date to reflect the yield on a portfolio of high quality fixed income corporate debt instruments matched against projected cash flows for future benefits.

Our long-term rate of return on plan assets assumption is selected from a range of probable return outcomes from an analysis of the asset portfolio.  Our expectations for the future investment returns of the asset categories are based on a combination of historical market performance, evaluations of investment forecasts obtained from external consultants and economists, and current market yields. The methodology underlying the return assumption includes the various elements of the expected return for each asset class such as long-term rates of return, volatility of returns, and the correlation of returns between various asset classes. The expected return for the total portfolio is calculated based on the plan's strategic asset allocation.  Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies, and quarterly investment portfolio reviews.  Risk tolerance is established through consideration of plan liabilities, plan funded status, and corporate financial condition.

Our mortality rate assumption reflects our best estimate, as of the measurement date, of the life expectancies of plan participants in order to determine the expected length of time for benefit payments. We derive our assumptions from industry mortality tables.

The expected return assumption for the life insurance reserve for our OPEB plan is based on full investment in fixed income securities with an average book yield of 4.31 percent and 4.59 percent in 2022 and 2021, respectively.

The rate of compensation increase assumption for our U.K. pension plan is generally based on periodic studies of compensation trends.

At December 31, 2022 and 2021, the annual rates of increase in the per capita cost of covered postretirement health care benefits assumed for the next calendar year are 7.00 percent and 6.25 percent, respectively, for benefits payable to both retirees prior to Medicare eligibility as well as Medicare eligible retirees. The rates are assumed to change gradually to 5.00 percent by 2031 for measurement at December 31, 2022 and remain at that level thereafter. The annual rates of increase in the per capita cost of covered postretirement health benefits do not apply to retirees whose postretirement health care benefits are provided through an exchange.

186

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

Net Periodic Benefit Cost

The following table provides the components of the net periodic benefit cost (credit) for the years ended December 31.

	Pension Benefits
	U.S. Plans						U.K. Plan						OPEB
	2022		2021		2020		2022		2021		2020		2022		2021		2020
	(in millions of dollars)
Service Cost	$	7.7	$	9.6	$	11.0	$	—	$	—	$	—	$	—	$	—	$	—
Interest Cost	67.2		65.0		73.0		5.0		4.2		4.9		3.0		3.0		4.1
Expected Return on Plan Assets	(105.9)		(100.6)		(106.7)		(10.9)		(9.8)		(9.5)		(0.5)		(0.5)		(0.5)
Amortization of:
Net Actuarial Loss (Gain)	16.3		21.3		18.7		0.4		1.3		1.1		(1.0)		—		—
Prior Service Cost (Credit)	—		—		0.1		—		—		—		(0.2)		(0.2)		(0.2)
Curtailment Gain	—		—		—		—		—		0.1		—		—		—
Total Net Periodic Benefit Cost (Credit)	$	(14.7)	$	(4.7)	$	(3.9)	$	(5.5)	$	(4.3)	$	(3.4)	$	1.3	$	2.3	$	3.4

The service cost component of net periodic pension and postretirement benefit cost (credit) is included as a component of compensation expense in our consolidated statements of income. All other components of net periodic pension and postretirement benefit cost (credit) are included in other expenses.

Benefit Payments

The following table provides expected benefit payments, which reflect expected future service, as appropriate.

	Pension Benefits
	U.S. Plans		U.K. Plan		OPEB
	(in millions of dollars)
Year					Gross		Subsidy Payments		Net
2023	$	84.9	$	5.4	$	10.0	$	0.1	$	9.9
2024	88.2		5.5		9.4		0.1		9.3
2025	92.1		5.7		9.0		0.1		8.9
2026	96.5		5.8		8.5		—		8.5
2027	100.6		6.0		8.1		—		8.1
2028-2032	550.6		32.4		34.0		0.1		33.9

Funding Policy

The funding policy for our U.S. qualified defined benefit pension plan is to contribute an amount at least equal to the minimum contributions required under ERISA and other applicable laws, but generally not greater than the maximum amount that can be deducted for federal income tax purposes. We had no regulatory contribution requirements for our U.S. qualified defined benefit pension plan in 2022 and made no amount of voluntary contributions during 2022. We do not expect to have regulatory contribution requirements for our U.S. qualified defined benefit pension plan in 2023, but we reserve the right to make voluntarily contributions during 2023. The funding policy for our U.S. non-qualified defined benefit pension plan, which is not subject to ERISA, is to contribute the amount necessary to satisfy the liabilities of the plan as they come due to participants. We expect to make contributions to the U.S. non-qualified defined benefit pension plan of approximately $9 million to fund the benefit payments in 2023.

187

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 9 - Employee Benefit Plans - Continued

We had no regulatory contribution requirements for our U.K. defined benefit pension plan in 2022 and made no amount of voluntary contributions during 2022. We do not expect to have regulatory contribution requirements for our U.K. defined benefit pension plan in 2023, but we reserve the right to make voluntarily contributions during 2023.

Our OPEB plan represents a non-vested, non-guaranteed obligation, and current regulations do not require specific funding levels for these benefits, which are comprised of retiree life, medical, and dental benefits. It is our practice to use general assets to pay medical and dental claims as they come due in lieu of utilizing plan assets for the medical and dental benefit portions of our OPEB plan.

Defined Contribution Plans

We offer a 401(k) plan to all eligible U.S. employees under which a portion of employee contributions is matched. We match dollar-for-dollar up to 5.0 percent of base salary and any recognized sales and performance-based incentive compensation for employee contributions into the plan. We also make an additional non-elective contribution of 4.5 percent of earnings for all eligible employees and made a separate transition contribution for eligible employees who met certain age and years of service criteria as of December 31, 2013. The separate transition contributions continued through December 31, 2020, at which point they ended. The 401(k) plan remains in compliance with ERISA guidelines and continues to qualify for a “safe harbor” from most annual discrimination testing.

We also offer a defined contribution plan to all eligible U.K. employees and offer related employer contributions. If an employee elects to make a minimum contribution of at least 1.0 percent of their base salary, we match with a contribution of 8.0 percent. We increase our contribution to a maximum of 12.0 percent as the employee increases their contribution from 1.0 percent to 5.0 percent. We do not increase our contribution percentage on employee contributions in excess of 5.0 percent.

During the years ended December 31, 2022, 2021, and 2020, we recognized costs of $70.9 million, $71.0 million, and $83.4 million, respectively, for our U.S. defined contribution plan. We recognized costs of $4.9 million, $4.9 million, and $5.0 million in 2022, 2021, and 2020, respectively, for our U.K. defined contribution plan.

Note 10 - Stockholders' Equity and Earnings Per Common Share

Earnings Per Common Share

Net income per common share is determined as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars, except share data)
Numerator
Net Income	$	1,314.2	$	824.2	$	793.0
Denominator (000s)
Weighted Average Common Shares - Basic	200,647.2		204,232.9		203,642.0
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	1,462.2		615.0		113.3
Weighted Average Common Shares - Assuming Dilution	202,109.4		204,847.9		203,755.3
Net Income Per Common Share
Basic	$	6.55	$	4.04	$	3.89
Assuming Dilution	$	6.50	$	4.02	$	3.89

We compute basic earnings per share by dividing net income by the weighted average number of common shares outstanding for the period. In computing earnings per share assuming dilution, we include potential common shares that are dilutive (those that

188

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 10 - Stockholders' Equity and Earnings Per Common Share - Continued

reduce earnings per share). We use the treasury stock method to account for the effect of outstanding stock options, nonvested stock success units, nonvested restricted stock units, and nonvested performance share units on the computation of diluted earnings per share. Under this method, the potential common shares from stock options, nonvested stock success units, and nonvested restricted stock units will each have a dilutive effect, as individually measured, when the average market price of Unum Group common stock during the period exceeds the exercise price of the stock options and the grant price of the nonvested stock success units and nonvested restricted stock units. Potential common shares from performance based share units will have a dilutive effect as the attainment of performance conditions is progressively achieved during the vesting period. Potential common shares not included in the computation of diluted earnings per share because the impact would be antidilutive, approximated 0.1 million, 1.1 million, and 1.6 million for the years ended December 31, 2022, 2021, and 2020, respectively. See Note 11 for further discussion of our stock-based compensation plans.

Common Stock

As part of our capital deployment strategy, we may repurchase shares of Unum Group's common stock, as authorized by our board of directors. The timing and amount of repurchase activity is based on market conditions and other considerations, including the level of available cash, alternative uses for cash, and our stock price. In October 2021, our board of directors authorized the repurchase of up to $250.0 million of Unum Group's outstanding common stock. The October 2021 share repurchase program expired on December 31, 2022, at which point there was no remaining repurchase amount under the program. During 2020 and the first nine months of 2021, there was no authorized share repurchase program.

In December 2022, our board of directors authorized the repurchase of up to $200.0 million of Unum Group's outstanding common stock beginning on January 1, 2023. In February 2023, our board of directors authorized an increase to the share repurchase program such that we are now authorized to repurchase up to $250.0 million of Unum Group's outstanding common stock. This share repurchase program has an expiration date of December 31, 2023.

Common stock repurchases, which are accounted for using the cost method and classified as treasury stock until otherwise retired, were as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions)
Shares Repurchased	5.7		1.9		—
Cost of Shares Repurchased1	$	200.1	$	50.0	$	—

1 Includes commissions of $0.1 million for the year ended December 31, 2022.

In February 2022, we entered into an accelerated share repurchase agreement with a financial counterparty to repurchase $50.0 million of Unum Group's common stock in aggregate. As part of this transaction, we paid $50.0 million to the financial counterparty and received an initial delivery of 1.3 million shares of our common stock, which represented approximately 75 percent of the total delivery under the agreement. We simultaneously entered into a forward contract indexed to the price of Unum Group common stock, which subjected the transaction to a future price adjustment. Under the terms of the share repurchase agreement, we were to receive, or be required to pay, a price adjustment based on the volume weighted average price of Unum Group common stock during the term of the agreement, less a discount. Any price adjustment payable to us was to be settled in shares of Unum Group common stock. Any price adjustment we would have been required to pay would have been settled in either cash or common stock at our option. The final price adjustment settlement, along with the delivery of the remaining shares, occurred in April 2022, resulting in the delivery to us of 0.4 million additional shares. In total, we repurchased 1.7 million shares pursuant to the February 2022 accelerated share repurchase agreement. During the year ended December 31, 2022, we repurchased 4.0 million shares in open market transactions at a cost of $150.1 million.

189

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 10 - Stockholders' Equity and Earnings Per Common Share - Continued

In November 2021, we entered into an accelerated repurchase agreement with terms similar to the previously discussed February 2022 accelerated share repurchase agreement. Pursuant to this agreement, we paid $50.0 million to a financial counterparty and received an initial delivery of 1.4 million shares of our common stock. We simultaneously entered into a forward contract indexed to the price of Unum Group common stock, which resulted in the delivery to us of 0.5 million additional shares also in November 2021. In total, we repurchased 1.9 million shares pursuant to the accelerated repurchase agreement. During 2021, there were no shares repurchased in open market transactions.

Preferred Stock

Unum Group has 25.0 million shares of preferred stock authorized with a par value of $0.10 per share. No preferred stock has been issued to date.

Note 11 - Stock-Based Compensation

Description of Stock Plans

Under the 2022 Stock Incentive Plan (the 2022 Plan), up to 6.8 million shares of common stock are available for awards to our employees, officers, consultants, and directors.  Awards may be in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, performance share units, and other stock-based awards.  Each award, under the 2022 plan is counted as 1.00 share. The exercise price for stock options issued cannot be less than the fair value of the underlying common stock as of the grant date. The maximum term of each stock option or stock appreciation right is ten years after the date of grant.  At December 31, 2022, approximately 6.6 million shares were available for future grants under the 2022 Plan.

Under the Stock Incentive Plan of 2017 (the 2017 Plan), which was terminated in May 2022 for the purposes of any further grants, up to 17.0 million shares of common stock were available for awards to our employees, officers, consultants, and directors. Awards could be in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, performance share units, and other stock-based awards. Each full-value award under the 2017 plan, defined as any award other than a stock option or stock appreciation right, were counted as 1.76 shares. Awards granted before the termination of the 2017 Plan remain outstanding in accordance with the plan's terms. Any shares subject to an outstanding award under the 2017 Plan that, after March 15, 2022, is not issued because the award is forfeited, terminates, expires or lapses without being exercised (as applicable), or is settled for cash, will become available for issuance under the 2022 Plan. Stock options had a term of eight years after the date of grant and fully vest after three years.

We issue new shares of common stock for all of our stock plan vestings and exercises.

Stock Success Units (SSUs)

SSUs are classified as equity. As of both December 31, 2022 and 2021, there were 208 thousand shares of SSUs outstanding with a weighted average grant date fair value of $18.78 per share. There were no issuances of SSUs during 2022 or 2021. During 2020, we issued SSUs with a weighted average grant date fair value per share of $18.78. SSUs vest over a six year period, beginning at the date of grant. One-third of the SSUs are eligible for accelerated vesting on a cumulative basis at the end of each of the one-, three-, and five-year service periods that began on January 1, 2021, if certain performance goals are achieved. Forfeitable dividends on SSUs are accrued in the form of cash. Compensation cost for SSUs subject to accelerated vesting due to the achievement of certain performance conditions at the end of the one-, three-, and five-year service periods is recognized over the implicit service period.

No SSUs vested or were forfeited during 2022. The total fair value of SSUs that vested during 2021 was $1.9 million. No SSUs vested during 2020. At December 31, 2022, we had $1.7 million of unrecognized compensation cost related to SSUs that will be recognized over a remaining weighted average period of 1.2 years.

190

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 11 - Stock-Based Compensation - Continued

Performance Share Units (PSUs)

PSUs are classified as equity. There were no new issuances of PSUs during 2022 or 2021. During 2020, we issued PSUs with a weighted average grant date fair value per share of $23.49. Vesting for the PSUs occurred at the end of a three-year period and was contingent upon our achievement of prospective company performance goals and our total shareholder return relative to a board-approved peer group during the three-year period. Actual performance, including modification for relative total shareholder return, could have resulted in the ultimate award of 40 percent to 180 percent of the initial number of PSUs issued, with the potential for no award if company performance goals had not been achieved during the three-year period. Forfeitable dividend equivalents on PSUs were accrued as cash.

We had no outstanding PSUs at December 31, 2022. We had 308 thousand PSUs outstanding at December 31, 2021 with a weighted average grant date fair value of $23.58 per share. There was a decrease of 75 thousand shares granted during 2022 with a weighted average grant date fair value of $40.67 per share, which reflects the application of the performance factor to the 2019 PSU grant that was less than 100 percent. 256 thousand shares vested during 2022 with a weighted average grant date fair value of $16.29 per share. Included in the 2022 vested amount is the application of the performance factor to the 2019 PSU grant, which occurred during the first quarter of 2022. There were 2 thousand shares forfeited during 2022 with a weighted average grant date fair value of $23.58 per share.

PSU shares represent aggregate initial target awards and accrued dividend equivalents and do not reflect potential increases or decreases resulting from the application of the performance factor determined after the end of the performance periods. At December 31, 2022, the three-year performance period for the 2020 PSU grant was completed and the related shares vested, but the performance factor had not yet been applied. The performance factor will be applied during the first quarter of 2023, with distribution of the stock at that time.

The total fair value of shares vested during 2022, 2021, and 2020 was $4.2 million, $6.6 million, and $6.5 million, respectively. At December 31, 2022, we had no unrecognized compensation cost related to PSUs as there are no remaining PSUs outstanding. The estimated compensation expense was adjusted for actual performance experience and was recognized ratably during the service period when it became probable that the performance conditions would be satisfied. Compensation cost for PSUs subject to accelerated vesting at the date of retirement eligibility was recognized over the implicit service period.

The fair value of PSUs is estimated on the date of initial grant using the Monte-Carlo simulation model. Key assumptions used to value PSUs granted during 2020 are as follows:

	Year Ended December 31, 2020
Expected Volatility (based on our and our peer group historical daily stock prices)	23	%
Expected Life (equals the performance period)	3 years
Risk Free Interest Rate (based on U.S. Treasury yields at the date of grant)	0.85	%

191

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 11 - Stock-Based Compensation - Continued

Cash Incentive Units (CIUs)

Activity for CIUs classified as a liability is as follows:

		Weighted Average
	Units	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	7,223	$	1.07
Granted	8,024	1.09
Outstanding at December 31, 2022	15,247	1.08

During 2022 and 2021, we issued CIUs with a weighted average grant date fair value per unit of $1.09 and $1.07, respectively. During 2020, no CIUs were issued. CIUs are denominated and settled in cash. Vesting for the CIUs occurs at the end of a three-year period and is based upon prospective company performance measures and our total shareholder return relative to a board-approved peer group during the three-year period. Actual performance, including modification for relative total shareholder return, may result in the ultimate award of 0 percent to 200 percent of the initial number of CIUs issued.

CIUs in the preceding table represent aggregate initial target awards and do not reflect potential increases or decreases resulting from the application of the performance factor determined after the end of the performance periods. No CIUs have vested as of December 31, 2022.

At December 31, 2022, we had approximately $9.6 million of unrecognized compensation cost related to CIUs that will be recognized over a weighted average period of one year. The estimated compensation expense is adjusted for actual performance experience and is recognized ratably during the service period, or remaining service period, if and when it becomes probable that the performance conditions will be satisfied. Compensation cost for CIUs subject to accelerated vesting at the date of retirement eligibility is recognized over the implicit service period.

The fair value of CIUs is estimated at each reporting period using the Monte-Carlo simulation model. Key assumptions used to value CIUs granted during current year are as follows:

	Year Ended December 31
	2022		2021
Expected Volatility (based on our and our peer group historical daily stock prices)	30	%	50	%
Expected Life (equals the performance period)	3 years		3 years
Risk Free Interest Rate (based on U.S. Treasury yields at the date of grant)	4.26	%	0.71	%

Restricted Stock Units (RSUs)

Activity for RSUs classified as equity is as follows:

		Weighted Average
	Shares	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	2,016	$	26.63
Granted	1,323	28.21
Vested	(1,018)	27.51
Forfeited	(139)	26.19
Outstanding at December 31, 2022	2,182	27.20

During 2022, 2021, and 2020, we issued RSUs with a weighted average grant date fair value per share of $28.21, $27.02, and $22.71, respectively.  RSUs vest over a one to three-year service period, beginning at the date of grant, and the compensation cost is recognized ratably during the vesting period.  Forfeitable dividend equivalents on RSUs are accrued as cash.

192

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 11 - Stock-Based Compensation - Continued

Compensation cost for RSUs subject to accelerated vesting at the date of retirement eligibility is recognized over the implicit service period.

The total fair value of shares vested during 2022, 2021, and 2020 was $28.0 million, $23.9 million, and $25.1 million, respectively. At December 31, 2022, we had $31.9 million of unrecognized compensation cost related to RSUs that will be recognized over a weighted average period of 0.8 years.

Cash-Settled RSUs

Activity for cash-settled RSUs classified as a liability is as follows:

		Weighted Average
	Shares	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	46	$	23.31
Vested	(23)	23.31
Outstanding at December 31, 2022	23	23.31

During 2020, we issued cash-settled RSUs with a weighted average grant date fair value per share of $22.94. There were no issuances of cash-settled RSUs during 2022 or 2021. Cash-settled RSUs vest over a one to three-year service period, beginning at the date of grant, and the compensation cost is recognized ratably during the vesting period. Forfeitable dividends on cash-settled RSUs are accrued in the form of cash. Compensation cost for cash-settled RSUs subject to accelerated vesting at the date of retirement eligibility is recognized over the implicit service period. The total fair value of cash-settled RSUs that vested during 2022 and 2021 was $0.7 million and $0.6 million, respectively. No cash-settled RSUs vested during 2020.

The amount payable per unit awarded is equal to the price per share of Unum Group's common stock at settlement of the award, and as such, we measure the value of the award each reporting period based on the current stock price. The effects of changes in the stock price during the service period are recognized as compensation cost over the service period. Changes in the amount of the liability due to stock price changes after the service period are recognized as compensation cost during the period in which the changes occur. At December 31, 2022, we had $0.2 million of unrecognized compensation cost related to cash-settled RSUs that will be recognized over a weighted average period of 0.1 years.

Stock Options

There were no stock options granted or vested in the years 2020 through 2022. There were no options exercised in 2022, and the intrinsic value of options exercised in both 2021 and 2020 was $0.1 million. As of December 31, 2021, we have no unrecognized compensation cost related to stock options as there are no exercisable stock options outstanding. Stock options vested over a one to three-year service period, beginning at the date of grant, and the compensation cost was recognized ratably during the vesting period. Compensation cost for stock options subject to accelerated vesting at the date of retirement eligibility was recognized over the implicit service period.

193

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 11 - Stock-Based Compensation - Continued

Expense

Compensation expense for the stock based plans, as reported in our consolidated statements of income, is as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Performance Share Units	$	5.7	$	3.3	$	5.6
Cash Incentive Units	12.8		3.2		—
Restricted Stock Units and Cash-Settled Restricted Stock Units	32.7		25.5		23.9
Stock Success Units	0.9		2.8		0.4
Other	0.6		0.6		0.5
Total Compensation Expense, Before Income Tax	$	52.7	$	35.4	$	30.4
Total Compensation Expense, Net of Income Tax	$	47.3	$	31.1	$	26.1

Cash received under all share-based payment arrangements for the years ended December 31, 2022, 2021, and 2020 was $4.2 million, $3.8 million, and $4.4 million, respectively.

Note 12 - Reinsurance

Reinsurance activity related to both our premium income and changes in reserves for future benefits are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Direct Premium Income	$	9,900.5	$	9,742.8	$	9,621.9
Reinsurance Assumed	78.7		90.6		94.1
Reinsurance Ceded	(355.8)		(352.4)		(337.9)
Net Premium Income	$	9,623.4	$	9,481.0	$	9,378.1
Ceded Benefits and Change in Reserves for Future Benefits	$	1,034.6	$	862.5	$	628.8

In December 2020, Provident, The Paul Revere Life Insurance Company (Paul Revere Life), and Unum America, wholly-owned domestic insurance subsidiaries of Unum Group and collectively referred to as "the ceding companies", each entered into separate reinsurance agreements with Commonwealth Annuity and Life Insurance Company (Commonwealth), to reinsure on a coinsurance basis effective as of July 1, 2020 approximately 75 percent of the Closed Block individual disability business, primarily direct business written by the ceding companies. In March 2021, we completed the second phase of the reinsurance transaction, pursuant to which the ceding companies and Commonwealth amended and restated their respective reinsurance agreements to reinsure on a coinsurance and modified coinsurance basis effective as of January 1, 2021, a substantial portion of the remaining Closed Block individual disability business that was not ceded in December 2020, primarily business previously assumed by the ceding companies. Commonwealth has established and will maintain collateralized trust accounts for the benefit of the ceding companies to secure its obligations under the relevant reinsurance agreement. In connection with the first phase of the reinsurance transaction which occurred in December 2020, the ceding companies paid a total ceding commission to Commonwealth of $437.7 million and transferred additional assets consisting primarily of fixed maturity securities and cash totaling $6,669.8 million. In connection with the second phase of the reinsurance transaction which occurred in March 2021, Commonwealth paid a total ceding commission to the ceding companies of $18.2 million. Also in connection with the second phase, the ceding companies transferred additional assets consisting primarily of fixed maturity securities and cash to Commonwealth of $767.0 million.

In December 2020, Provident Life and Casualty Insurance Company (PLC), also a wholly-owned domestic insurance subsidiary of Unum Group, entered into an agreement with Commonwealth whereby PLC will provide a 12-year volatility cover to

194

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 12 - Reinsurance - Continued

Commonwealth for the active life cohort (ALR cohort). As part of this agreement, PLC received a payment from Commonwealth of approximately $62 million. In March 2021, PLC and Commonwealth amended and restated this agreement to incorporate the ALR cohort related to the additional business that was reinsured between the ceding companies and Commonwealth as part of the second phase of the transaction. As part of the amended and restated volatility cover, PLC received a payment from Commonwealth of approximately $18 million. At the end of the 12-year coverage period in 2032, Commonwealth will retain the remaining incidence and claims risk on the ALR cohort of the ceded business. Under this volatility cover, annual settlements will be made equal to the difference between the actual and estimated cash flows and reserve changes during the year. Upon expiration of the 12-year period, a terminal settlement will be made based on the final disabled life reserves. As a result of the volatility cover, the reinsurance agreement covering the ALR cohort does not pass risk transfer requirements under GAAP and is accounted for under the deposit method.

As a result of the reinsurance transaction, we recognized the following items for the first phase in December 2020 and the second phase in March 2021, respectively:

•Net realized investment gains totaling $1,302.3 million and $67.6 million related to the transfer of investments.

•Increase in benefits and change in reserves for future benefits of $1,284.5 million and $133.1 million resulting from the realization of previously unrealized investment gains and losses recorded in accumulated other comprehensive income.

•Transaction costs totaling $21.0 million and $6.2 million.

•Reinsurance recoverable of $6,141.5 million and $990.0 million related to the policies on claim status (DLR cohort).

•Cost of reinsurance, or prepaid reinsurance premium, of $815.7 million and $43.1 million related to the DLR cohort.

•Deposit asset of $88.2 million and $5.0 million related to the ALR cohort.

•Tax benefit of $36.5 million, in connection with the first phase.

•Payable of $307.2 million related to the portfolio of invested assets associated with the business ceded on a modified coinsurance basis, in connection with the second phase.

The cost of reinsurance is amortized over the expected run-off pattern of the ceded reserves for the DLR cohort and we recognized $63.8 million, $79.1 million, and $2.6 million in amortization expense for 2022, 2021, and 2020, respectively. The deposit asset is adjusted over the 12-year period of the volatility cover based on cash flows related to the ALR cohort, settlement payments as determined above, and accretion of interest and will result in an amount equal to the expected disabled life reserve for the ALR cohort at the expiration of the volatility cover. Both the cost of reinsurance and the deposit asset are reported in Other Assets within our Consolidated Balance Sheets.

As of December 31, 2022, Commonwealth accounted for 59 percent of the total reinsurance recoverable and the majority of our total cost of reinsurance. Commonwealth has an A rating by A.M. Best Company (AM Best) and has also established collateralized trust accounts for our benefit to secure its obligations. In addition, nine other major companies, which account for approximately 36 percent of our reinsurance recoverable, are also rated A or better by either AM Best or Standard & Poor's Ratings Services (S&P), or are fully securitized by letters of credit or investment-grade fixed maturity securities held in trust. Approximately 4 percent of our reinsurance recoverable is primarily related to business reinsured with other companies also rated A- or better by AM Best or S&P, with overseas entities with equivalent ratings, or backed by letters of credit or trust agreements, or through reinsurance arrangements wherein we retain the assets in our general account. Less than one percent of our reinsurance recoverable is held by companies either rated below A- by AM Best or S&P, or not rated.

Note 13 - Segment Information

We have three principal operating business segments: Unum US, Unum International, and Colonial Life. Our other segments are Closed Block and Corporate.

The Unum US segment is comprised of group disability, group life and accidental death and dismemberment, and supplemental and voluntary lines of business. The group disability line of business includes long-term and short-term disability, medical stop-loss, and fee-based service products. The supplemental and voluntary line of business includes voluntary benefits, individual disability, and dental and vision products. These products are marketed through our field sales personnel who work in conjunction with independent brokers and consultants.

195

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 13 - Segment Information - Continued

The Unum International segment is comprised of our operations in both the United Kingdom and Poland. Our Unum UK products include insurance for group long-term disability, group life, and supplemental lines of business which include dental, individual disability, and critical illness products. Our Unum Poland products include insurance for individual and group life with accident and health riders. Unum International's products are sold primarily through field sales personnel and independent brokers and consultants.

The Colonial Life segment includes insurance for accident, sickness, and disability products, which includes our dental and

vision products, life products, and cancer and critical illness products marketed to employees, on both a group and an individual basis, at the workplace through an independent contractor agent sales force and brokers.

The Closed Block segment consists of group and individual long-term care, and other insurance products no longer actively marketed. We discontinued offering individual long-term care in 2009 and group long-term care in 2012. Other insurance products include individual disability, group pension, individual life and corporate-owned life insurance, reinsurance pools and management operations, and other miscellaneous product lines. In December 2020, we entered into the first phase of a reinsurance agreement to reinsure the majority of our Closed Block individual disability products to a third party. In March 2021, we completed the second phase of the reinsurance transaction to reinsure a portion of the remaining Closed Block individual disability business that was not ceded in December 2020. See Note 12 for further discussion.

The Corporate segment includes investment income on corporate assets not specifically allocated to a line of business, interest expense on corporate debt, and certain other corporate income and expenses not allocated to a line of business.

Impairment Loss on Internal-Use Software

During 2021, we recognized an impairment loss of $12.1 million for previously capitalized internal-use software that we no longer plan to utilize. We determined that this internal-use software would no longer be developed in order to focus our efforts on the development of software that better supports our long-term strategic goals. The impairment loss reduced the carrying value of the internal-use software to zero and has been recorded within other expenses in the consolidated statements of income and is included within our Corporate segment.

Costs Related to Organizational Design Update

During 2020, we realigned certain parts of our organizational structure by shifting resources to accelerate growth, fund priority investments, and simplify and improve our business practices. In connection with this update, we incurred charges of $23.3 million, which primarily consisted of employee severance and benefit costs as well as certain costs related to lease terminations and the disposal of certain fixed assets. These costs were recorded within either compensation expense or other expenses in the consolidated statements of income and were included within our Corporate segment. This update did not result in the exit or disposal of any of our lines of business.

196

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 13 - Segment Information - Continued

Segment information is shown below. Certain prior year amounts were reclassified to conform to current year presentation.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	1,911.7	$	1,827.8	$	1,828.5
Group Short-term Disability	926.3		864.0		799.2
Group Life and Accidental Death & Dismemberment
Group Life	1,669.1		1,641.9		1,640.5
Accidental Death & Dismemberment	173.7		165.1		163.9
Supplemental and Voluntary
Voluntary Benefits	840.6		846.7		875.2
Individual Disability	461.1		459.8		456.0
Dental and Vision	275.8		272.7		255.6
	6,258.3		6,078.0		6,018.9
Unum International
Unum UK
Group Long-term Disability	376.9		401.9		364.9
Group Life	138.2		112.3		108.5
Supplemental	114.0		112.6		99.8
Unum Poland	89.7		90.2		79.6
	718.8		717.0		652.8
Colonial Life
Accident, Sickness, and Disability	948.9		953.3		975.1
Life	401.1		384.7		376.4
Cancer and Critical Illness	352.0		352.2		360.5
	1,702.0		1,690.2		1,712.0
Closed Block
Long-term Care	697.4		704.3		666.9
All Other	246.9		291.5		327.5
	944.3		995.8		994.4
Total Premium Income	$	9,623.4	$	9,481.0	$	9,378.1

197

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 13 - Segment Information - Continued

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Year Ended December 31, 2022
Premium Income	$	6,258.3	$	718.8	$	1,702.0	$	944.3	$	—	$	9,623.4
Net Investment Income	676.3		170.1		152.7		1,070.6		52.5		2,122.2
Other Income	196.3		0.9		1.1		58.0		4.8		261.1
Adjusted Operating Revenue	$	7,130.9	$	889.8	$	1,855.8	$	2,072.9	$	57.3	$	12,006.7
Adjusted Operating Income (Loss)	$	970.7	$	127.0	$	374.6	$	247.9	$	(164.3)	$	1,555.9
Interest and Debt Expense	$	—	$	—	$	—	$	—	$	192.7	$	192.7
Depreciation and Amortization	$	370.6	$	22.0	$	303.5	$	4.7	$	0.6	$	701.4
Year Ended December 31, 2021
Premium Income	$	6,078.0	$	717.0	$	1,690.2	$	995.8	$	—	$	9,481.0
Net Investment Income	721.6		132.7		172.0		1,159.0		27.9		2,213.2
Other Income	170.0		0.6		1.0		65.1		6.2		242.9
Adjusted Operating Revenue	$	6,969.6	$	850.3	$	1,863.2	$	2,219.9	$	34.1	$	11,937.1
Adjusted Operating Income (Loss)	$	464.9	$	105.7	$	329.2	$	394.7	$	(177.9)	$	1,116.6
Interest and Debt Expense	$	—	$	—	$	—	$	—	$	185.0	$	185.0
Depreciation and Amortization	$	400.9	$	21.0	$	275.4	$	5.1	$	0.7	$	703.1
Year Ended December 31, 2020
Premium Income	$	6,018.9	$	652.8	$	1,712.0	$	994.4	$	—	$	9,378.1
Net Investment Income	720.3		104.6		155.7		1,370.3		9.8		2,360.7
Other Income	154.9		0.5		1.1		66.6		1.1		224.2
Adjusted Operating Revenue	$	6,894.1	$	757.9	$	1,868.8	$	2,431.3	$	10.9	$	11,963.0
Adjusted Operating Income (Loss)	$	825.4	$	76.6	$	335.4	$	241.4	$	(200.8)	$	1,278.0
Interest and Debt Expense	$	—	$	—	$	—	$	3.1	$	185.1	$	188.2
Depreciation and Amortization	$	421.7	$	20.1	$	273.9	$	5.9	$	0.7	$	722.3

198

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 13 - Segment Information - Continued

			Unum		Colonial
	Unum US		International		Life		Total
	(in millions of dollars)
Deferred Acquisition Costs
Year Ended December 31, 2022
Beginning of Year	$	1,096.2	$	35.4	$	1,076.3	$	2,207.9
Capitalization	273.1		12.0		271.8		556.9
Amortization	(294.9)		(7.6)		(288.5)		(591.0)
Adjustment Related to Unrealized Investment Gains and Losses	15.0		—		66.7		81.7
Foreign Currency	—		(3.2)		—		(3.2)
End of Year	$	1,089.4	$	36.6	$	1,126.3	$	2,252.3
Year Ended December 31, 2021
Beginning of Year	$	1,168.7	$	32.0	$	1,071.9	$	2,272.6
Capitalization	242.7		12.8		252.6		508.1
Amortization	(319.0)		(8.0)		(259.1)		(586.1)
Adjustment Related to Unrealized Investment Gains and Losses	3.8		—		10.9		14.7
Foreign Currency	—		(1.4)		—		(1.4)
End of Year	$	1,096.2	$	35.4	$	1,076.3	$	2,207.9
Year Ended December 31, 2020
Beginning of Year	$	1,223.0	$	26.4	$	1,074.6	$	2,324.0
Capitalization	291.5		12.1		272.6		576.2
Amortization	(341.0)		(7.4)		(257.7)		(606.1)
Adjustment Related to Unrealized Investment Gains and Losses	(4.8)		—		(17.6)		(22.4)
Foreign Currency	—		0.9		—		0.9
End of Year	$	1,168.7	$	32.0	$	1,071.9	$	2,272.6

	December 31
	2022		2021
	(in millions of dollars)
Assets
Unum US	$	16,278.7	$	18,696.3
Unum International	3,154.9		4,086.5
Colonial Life	4,448.9		4,895.9
Closed Block	34,241.2		38,287.9
Corporate	3,311.2		4,149.0
Total Assets	$	61,434.9	$	70,115.6

Revenue is primarily derived from sources in the United States, the United Kingdom, and Poland. There are no material revenues or assets attributable to foreign operations other than those reported in our Unum International segment.

199

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 13 - Segment Information - Continued

We report goodwill in our Unum US, Unum International, and Colonial Life segments, which are the segments expected to benefit from the originating business combinations. At December 31, 2022 and 2021 goodwill was $347.6 million and $352.2 million, respectively, with $280.0 million attributable to Unum US in each year, $39.9 million and $44.5 million, respectively, attributable to Unum International, and $27.7 million attributable to Colonial Life in each year.

Stockholders' equity is allocated to the operating segments on the basis of an internal allocation formula that reflects the volume and risk components of each operating segment's business and aligns allocated equity with our target capital levels for regulatory and rating agency purposes. We modify this formula periodically to recognize changes in the views of capital requirements.

We measure and analyze our segment performance on the basis of "adjusted operating revenue" and "adjusted operating income" or "adjusted operating loss", which differ from total revenue and income before income tax as presented in our consolidated statements of income due to the exclusion of investment gains and losses and the amortization of the cost of reinsurance as well as other items specified in the reconciliations below. We believe adjusted operating revenue and adjusted operating income or loss are better performance measures and better indicators of the revenue and profitability and underlying trends in our business. These performance measures are in accordance with GAAP guidance for segment reporting, but they should not be viewed as a substitute for total revenue, income before income tax, or net income. 

Investment gains or losses primarily include realized investment gains or losses, expected investment credit losses, and gains or losses on derivatives. Investment gains or losses depend on market conditions and do not necessarily relate to decisions regarding the underlying business of our segments. Our investment focus is on investment income to support our insurance liabilities as opposed to the generation of investment gains or losses. Although we may experience investment gains or losses which will affect future earnings levels, a long-term focus is necessary to maintain profitability over the life of the business since our underlying business is long-term in nature, and we need to earn the interest rates assumed in calculating our liabilities.

As previously discussed in Note 12, we have exited a substantial portion of our Closed Block individual disability product line through the two phases of the reinsurance transaction that were executed in December 2020 and March 2021. As a result, we exclude the amortization of the cost of reinsurance that was recognized upon the exit of the business related to the DLR cohort of policies. We believe that the exclusion of the amortization of the cost of reinsurance provides a better view of our results from our ongoing businesses.

We may, at other times, exclude certain other items from our discussion of financial ratios and metrics in order to enhance the understanding and comparability of our operational performance and the underlying fundamentals but this exclusion is not an indication that similar items may not recur and does not replace net income or net loss as a measure of our overall profitability.

See above and Notes 3, 6, 8, 12, and 15 for further discussion regarding the items specified in the reconciliation below.

200

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 13 - Segment Information - Continued

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
	2022		2021		2020
	(in millions of dollars)
Total Revenue	$	11,991.0	$	12,013.8	$	13,162.1
Excluding:
Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Adjusted Operating Revenue	$	12,006.7	$	11,937.1	$	11,963.0
Income Before Income Tax	$	1,631.4	$	1,063.0	$	964.0
Excluding:
Net Investment Gains and Losses
Net Realized Investment Gain Related to Reinsurance Transaction	—		67.6		1,302.3
Net Investment Gain (Loss), Other	(15.7)		9.1		(103.2)
Total Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Items Related to Closed Block Individual Disability Reinsurance Transaction
Change in Benefit Reserves and Transaction Costs	—		(139.3)		(1,305.5)
Amortization of the Cost of Reinsurance	(63.8)		(79.1)		(2.6)
Total Items Related to Closed Block Individual Disability Reinsurance Transaction	(63.8)		(218.4)		(1,308.1)
Net Reserve Change Related to Reserve Assumption Updates	155.0		181.4		(169.0)
Impairment Loss on Internal-Use Software	—		(12.1)		—
Cost Related to Early Retirement of Debt	—		(67.3)		—
Impairment Loss on ROU Asset	—		(13.9)		(12.7)
Costs Related to Organizational Design Update	—		—		(23.3)
Adjusted Operating Income	$	1,555.9	$	1,116.6	$	1,278.0

201

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 14 - Commitments and Contingent Liabilities

Commitments

See Notes 2 and 3 for further discussion on certain investment commitments of the Company.

Contingent Liabilities

We are a defendant in a number of litigation matters that have arisen in the normal course of business, including the matters discussed below. Further, state insurance regulatory authorities and other federal and state authorities regularly make inquiries and conduct investigations concerning our compliance with applicable insurance and other laws and regulations. Given the complexity and scope of our litigation and regulatory matters, it is not possible to predict the ultimate outcome of all pending investigations or legal proceedings or provide reasonable estimates of potential losses, except if noted in connection with specific matters.

In some of these matters, no specified amount is sought. In others, very large or indeterminate amounts, including punitive and treble damages, are asserted. There is a wide variation of pleading practice permitted in the United States courts with respect to requests for monetary damages, including some courts in which no specified amount is required and others which allow the plaintiff to state only that the amount sought is sufficient to invoke the jurisdiction of that court. Further, some jurisdictions permit plaintiffs to allege damages well in excess of reasonably possible verdicts. Based on our extensive experience and that of others in the industry with respect to litigating or resolving claims through settlement over an extended period of time, we believe that the monetary damages asserted in a lawsuit or claim bear little relation to the merits of the case, or the likely disposition value. Therefore, the specific monetary relief sought is not stated.

Unless indicated otherwise in the descriptions below, reserves have not been established for litigation and contingencies. An estimated loss is accrued when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated.

Claims Handling Matters

We and our insurance subsidiaries, in the ordinary course of our business, are engaged in claim litigation where disputes arise as a result of a denial or termination of benefits. Most typically these lawsuits are filed on behalf of a single claimant or policyholder, and in some of these individual actions punitive damages are sought, such as claims alleging bad faith in the handling of insurance claims. For our general claim litigation, we maintain reserves based on experience to satisfy judgments and settlements in the normal course. We expect that the ultimate liability, if any, with respect to general claim litigation, after consideration of the reserves maintained, will not be material to our consolidated financial condition. Nevertheless, given the inherent unpredictability of litigation, it is possible that an adverse outcome in certain claim litigation involving punitive damages could, from time to time, have a material adverse effect on our consolidated results of operations in a period, depending on the results of operations for the particular period.

From time to time class action allegations are pursued where the claimant or policyholder purports to represent a larger number of individuals who are similarly situated. Since each insurance claim is evaluated based on its own merits, there is rarely a single act or series of actions which can properly be addressed by a class action. Nevertheless, we monitor these cases closely and defend ourselves appropriately where these allegations are made.

Note 15 - Leases

We lease certain buildings and equipment under various noncancellable operating lease agreements. In addition, we have sub-lease agreements on a limited number of our building lease agreements. We generally have the option to renew the majority of our building leases and equipment leases at the end of the lease term at the fair rental value at the time of renewal.

We do not have any lease agreements or sub-lease agreements that contain variable lease payments. In addition, we do not have lease agreements or sub-lease agreements that contain residual value guarantees or impose any financial restrictions or covenants with the lessors.

202

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 15 - Leases - Continued

Operating lease information is as follows:

	Year Ended December 31
	2022			2021			2020
	(in millions of dollars)
Lease Cost
Operating Lease Cost	$	19.6		$	35.2		$	48.6
Sublease Income	(1.1)			(1.0)			(1.3)
Total Lease Cost	$	18.5		$	34.2		$	47.3
Other Information
Cash Paid for Amounts Included in the Measurement of Lease Liabilities	$	23.1		$	29.9		$	30.8
Weighted-Average Remaining Lease Term	6 years			6 years			6 years
Weighted-Average Discount Rate	4.32		%	4.45		%	4.37		%

As of December 31, 2022, aggregate undiscounted minimum lease payments and the reconciliation to our lease liability are as follows (in millions of dollars):

2023	$	18.2
2024	14.4
2025	11.1
2026	9.1
2027	8.3
2028 and Thereafter	17.4
Total	78.5
Less Imputed Interest	10.6
Lease Liability	$	67.9

The right-of-use asset was $37.7 million and $49.1 million at December 31, 2022 and 2021, respectively.

During 2021 and 2020, we recognized impairment losses of $13.9 million and $12.7 million, respectively, on the ROU asset related to one of our operating leases for office space that we do not plan to continue using to support our general operations. The impairment losses were recorded as a result of a decrease in the fair value of the ROU asset compared to its carrying value. The fair value of the ROU asset was determined based on a discounted cash flow model utilizing estimated market rates for sub-lease rentals. The impairment losses for each period are recorded within other expenses in the consolidated statements of income and are included within our Corporate segment.

203

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 16 - Statutory Financial Information

Statutory Net Income, Capital and Surplus, and Dividends

Statutory net income for U.S. life insurance companies is reported in conformity with statutory accounting principles prescribed by the National Association of Insurance Commissioners (NAIC) and adopted by applicable domiciliary state laws. The commissioners of the states of domicile have the right to permit other specific practices that may deviate from prescribed practices. In connection with a financial examination of Unum America, which closed at the end of the second quarter of 2020, the Maine Bureau of Insurance (MBOI) concluded that Unum America’s long-term care statutory reserves were deficient by $2,100.0 million as of December 31, 2018, the financial statement date of the examination period. The amount reserves are deficient may increase or decrease over time based on changes in assumed reinvestment rates, policyholder inventories, rate increase activity, and the underlying growth in the locked in statutory reserve basis as well as updates to other long term actuarial assumptions. The MBOI granted permission to Unum America on May 1, 2020, to phase in the additional statutory reserves over seven years beginning with year-end 2020 and ending with year-end 2026. Additional information regarding the Unum America premium deficiency reserve (PDR) is as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Premium Deficiency Reserve
Gross Premium Deficiency Reserve1	$	2,851.0	$	2,977.0	$	2,290.0
Cumulative Gross Premium Deficiency Reserve Recognized	1,191.0		667.0		229.0
Remaining Premium Deficiency Reserve to be Recognized	$	1,660.0	$	2,310.0	$	2,061.0
1The gross PDR decreased by $126.0 million due primarily to premium rate increase activity and underlying growth in the locked-in statutory reserve basis during 2022. The gross PDR increased by $687.0 million and $190.0 million during 2021 and 2020, respectively, due primarily to changes in the assumed reinvestment rate. The increase for 2020 was from the original $2,100.0 million reserve deficiency as of December 31, 2018.

The phase in amounts for 2022, 2021, and 2020 were funded using cash flows from operations and capital contributions from Unum Group. This strengthening is incorporated by using explicitly agreed upon margins into our existing assumptions for annual statutory reserve adequacy testing. These actions add margin to Unum America's best estimate assumptions. Our long-term care reserves and financial results reported under generally accepted accounting principles are not affected by the MBOI’s examination conclusion. We plan to fund the additional statutory reserves with expected cash flows and capital contributions from Unum Group. If the permitted practice was not granted by the MBOI to phase in these additional statutory reserves, the impact to the risk-based capital ratio would have triggered a regulatory event. Our other traditional U.S. life insurance subsidiaries have no prescribed or permitted statutory accounting practices that differ materially from statutory accounting principles prescribed by the NAIC.

Unum America cedes certain blocks of business to Fairwind Insurance Company (Fairwind), which is an affiliated captive reinsurance subsidiary (captive reinsurer) domiciled in the United States, with Unum Group as the ultimate parent. This captive reinsurer was established for the limited purpose of reinsuring risks attributable to specified policies issued or reinsured by Unum America.

Fairwind, which is domiciled in the state of Vermont, is required to follow GAAP in accordance with Vermont reporting requirements for pure captive insurance companies, unless the commissioner permits the use of some other basis of accounting. Fairwind has permission from Vermont to follow accounting practices that are generally consistent with current NAIC statutory accounting principles for its insurance reserves and invested assets supporting reserves. All other assets and liabilities are accounted for in accordance with GAAP, as prescribed by Vermont, which includes the full recognition of deferred tax assets which are more likely than not to be realized. Statutory accounting principles have a stricter limitation for the recognition of deferred tax assets. The impact of following the prescribed and permitted practices of Vermont rather than statutory accounting principles prescribed by the NAIC resulted in higher capital and surplus for Fairwind of approximately $351 million and $360 million as of December 31, 2022 and 2021 respectively. The 2022, 2021, and 2020 results for Fairwind include the $524.0 million, $438 million, and $229 million increases to long-term care statutory reserves assumed from Unum America.

204

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 16 - Statutory Financial Information - Continued

In December 2020, prior to entering into the reinsurance transaction with Commonwealth, Provident, Paul Revere Life, and Unum America recaptured their respective reinsurance agreements with Northwind Reinsurance Company (Northwind Re), a wholly-owned domestic special purpose reinsurance subsidiary. See Note 12 for further discussion regarding the reinsurance transaction with Commonwealth.

Northwind Re was established for the limited purpose of reinsuring risks attributable to specified policies issued or reinsured by the aforementioned companies, and had no material state prescribed accounting practices that differ from statutory accounting principles prescribed by the NAIC. As a result of the recapture of the reinsurance agreements during 2020, no insurance risk remained in Northwind Re. In 2021, Northwind Re obtained a Certificate of Dormancy from the Vermont Department of Financial Regulation authorizing it to exist as a dormant captive insurance company, leaving Fairwind as the only remaining active captive reinsurer. During 2022, Northwind Re was merged with one of our non-insurance U.S. holding companies, Northwind Holdings, with Northwind Holdings remaining as the surviving company. Subsequently during 2022, Northwind Holdings was merged into Unum Group.

The operating results and capital and surplus of our traditional U.S. life insurance subsidiaries and our captive reinsurers, prepared in accordance with prescribed or permitted accounting practices of the NAIC or states of domicile, are presented separately below.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Combined Net Income (Loss)
Traditional U.S. Life Insurance Subsidiaries	$	965.4	$	779.5	$	646.8
Captive Reinsurers	$	(432.2)	$	(159.0)	$	(201.0)
Combined Net Gain (Loss) from Operations, After Tax
Traditional U.S. Life Insurance Subsidiaries	$	965.4	$	681.1	$	726.2
Captive Reinsurers	$	(428.6)	$	(247.4)	$	(149.4)

	December 31
	2022		2021
	(in millions of dollars)
Combined Capital and Surplus
Traditional U.S. Life Insurance Subsidiaries	$	3,816.3	$	3,950.3
Captive Reinsurers	$	1,229.6	$	1,258.4

Solvency II, an European Union directive that is part of retained U.K. law pursuant to the European Union (Withdrawal) Act 2018, prescribes capital requirements and risk management standards for the European insurance industry. As derived from the most recent annual financial statements for December 31, 2021, based on Solvency II requirements, regulatory net gain and own funds available of our United Kingdom insurance subsidiary, Unum Limited, were £121.8 million and £631.0 million, respectively.

Risk-based capital (RBC) standards for U.S. life insurance companies are prescribed by the NAIC. The domiciliary states of our U.S. insurance subsidiaries have all adopted a version of the RBC model formula of the NAIC, which prescribes a system for assessing the adequacy of statutory capital and surplus for all life and health insurers. The basis of the system is a risk-based formula that applies prescribed factors to the various risk elements in a life and health insurer's business to report a minimum capital requirement proportional to the amount of risk assumed by the insurer. The life and health RBC formula is designed to measure annually (i) the risk of loss from asset defaults and asset value fluctuations, (ii) the risk of loss from adverse mortality and morbidity experience, (iii) the risk of loss from mismatching of asset and liability cash flow due to changing interest rates, and (iv) business risks. The formula is used as an early warning tool to identify companies that are potentially inadequately capitalized. State insurance laws grant insurance regulators the authority to require various actions by, or take various actions

205

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS - Continued

Unum Group and Subsidiaries

Note 16 - Statutory Financial Information - Continued

against, insurers whose total adjusted capital does not meet or exceed certain RBC levels. The total adjusted capital of each of our U.S. insurance subsidiaries at December 31, 2022 is in excess of those RBC levels.

Restrictions under applicable state insurance laws limit the amount of dividends that can be paid to a parent company from its insurance subsidiaries in any 12-month period without prior approval by regulatory authorities. For life insurance companies domiciled in the U.S., that limitation generally equals, depending on the state of domicile, either ten percent of an insurer's statutory surplus with respect to policyholders as of the preceding year end or the statutory net gain from operations, excluding net realized capital gains and losses, of the preceding year. The payment of dividends to a parent company from a life insurance subsidiary is generally further limited to the amount of unassigned funds.

Based on the restrictions under current law, approximately $991 million is available, without prior approval by regulatory authorities, during 2023 for the payment of dividends to Unum Group from its traditional U.S. life insurance subsidiaries. The ability of our captive insurer to pay dividends to Unum Group will depend on the satisfaction of applicable regulatory requirements and on the performance of the business reinsured by Fairwind.

We also have the ability to receive dividends from our foreign subsidiaries, primarily in the U.K., for which the payment may be subject to applicable insurance company regulations and capital guidance. Approximately £80 million is considered distributable from Unum Limited during 2023, subject to local solvency standards and regulatory approval.

Deposits

At December 31, 2022 and 2021, our U.S. life insurance subsidiaries had on deposit with U.S. regulatory authorities securities with a book value of $118.8 million and $117.7 million, respectively, held for the protection of policyholders.

206

ITEM 9. CHANGES IN AND DISAGREEMENTS WITH ACCOUNTANTS ON ACCOUNTING AND FINANCIAL DISCLOSURE

None

ITEM 9A. CONTROLS AND PROCEDURES

Under the supervision and with the participation of our management, including our Chief Executive Officer and Chief Financial Officer, we have evaluated the effectiveness of our disclosure controls and procedures, as defined in Rule 13a-15(e) under the Securities Exchange Act of 1934, as amended, as of the end of the period covered by this report. We evaluated those controls based on the 2013 Internal Control - Integrated Framework from the Committee of Sponsoring Organizations of the Treadway Commission. Based on that evaluation, these officers concluded that our disclosure controls and procedures were effective as of December 31, 2022.

There have been no changes in our internal control over financial reporting, as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended, during the quarter ended December 31, 2022 that have materially affected, or are reasonably likely to materially affect, our internal control over financial reporting.

Management's Annual Report on Internal Control over Financial Reporting

The Company's management is responsible for establishing and maintaining adequate internal control over financial reporting, as defined in Rule 13a-15(f) under the Securities Exchange Act of 1934, as amended.  The Company's internal control over financial reporting encompasses the processes and procedures management has established to (i) maintain records that, in reasonable detail, accurately and fairly reflect the Company's transactions and dispositions of assets; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with U.S. generally accepted accounting principles; (iii) provide reasonable assurance that receipts and expenditures are appropriately authorized; and (iv) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the Company's assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. In addition, any projection of the evaluation of effectiveness to future periods is subject to the risks that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate. 

We assessed the effectiveness of our internal control over financial reporting, based on criteria established in the 2013 Internal Control - Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission, and concluded that, as of December 31, 2022, we maintained effective internal control over financial reporting.

Attestation Report of the Company's Registered Public Accounting Firm

Ernst & Young LLP, the independent registered public accounting firm that audited our consolidated financial statements included herein, audited the effectiveness of our internal control over financial reporting, as of December 31, 2022, and issued the attestation report included as follows.

207

Report of Independent Registered Public Accounting Firm

To the Stockholders and the Board of Directors of Unum Group

Opinion on Internal Control Over Financial Reporting

We have audited Unum Group and Subsidiaries’ internal control over financial reporting as of December 31, 2022, based on criteria established in Internal Control-Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (2013 framework) (the COSO criteria). In our opinion, Unum Group and Subsidiaries (the Company) maintained, in all material respects, effective internal control over financial reporting as of December 31, 2022, based on the COSO criteria.

We also have audited, in accordance with the standards of the Public Company Accounting Oversight Board (United States) (PCAOB), the consolidated balance sheets of the Company as of December 31, 2022 and 2021, the related consolidated statements of income, comprehensive income (loss), stockholders' equity and cash flows for each of the three years in the period ended December 31, 2022, and the related notes and financial statement schedules listed in the Index at Item 15(a)(2) and our report dated February 23, 2023 expressed an unqualified opinion thereon.

Basis for Opinion

The Company’s management is responsible for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting included in the accompanying “Management’s Annual Report on Internal Control over Financial Reporting”. Our responsibility is to express an opinion on the Company’s internal control over financial reporting based on our audit. We are a public accounting firm registered with the PCAOB and are required to be independent with respect to the Company in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.

We conducted our audit in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether effective internal control over financial reporting was maintained in all material respects.

Our audit included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, testing and evaluating the design and operating effectiveness of internal control based on the assessed risk, and performing such other procedures as we considered necessary in the circumstances. We believe that our audit provides a reasonable basis for our opinion.

Definition and Limitations of Internal Control Over Financial Reporting

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (1) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (2) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (3) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ Ernst & Young LLP

Chattanooga, Tennessee

February 23, 2023

208

ITEM 9B. OTHER INFORMATION

None

ITEM 9C. DISCLOSURE REGARDING FOREIGN JURISDICTIONS THAT PREVENT INSPECTIONS

Not Applicable

209

PART III

ITEM 10. DIRECTORS, EXECUTIVE OFFICERS, AND CORPORATE GOVERNANCE

The information required by this Item with respect to directors is included under the caption "Information About the Board of Directors" in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference.

The information required by this Item with respect to our executive officers is included under the caption "Information about our Executive Officers" contained herein in Item 1 and is incorporated herein by reference.

Our internet website address is www.unum.com. We have adopted corporate governance guidelines, a code of conduct applicable to all of our directors, officers and employees, and charters for the audit, human capital, governance, risk and finance and regulatory compliance committees of our board of directors in accordance with the requirements of the New York Stock Exchange (NYSE).

The information required by this Item with respect to a code of ethics for our chief executive officer and certain senior financial officers is included under the caption "Board and Committee Governance", sub-caption "Codes of Conduct and Ethics", in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference.

The information required by this Item with respect to the audit committee and audit committee financial experts is included under the caption "Board and Committee Governance", sub-caption "Committees of the Board", in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference. In addition, information relating to the procedures by which our shareholders may recommend nominees to our board of directors is included under the caption "Corporate Governance", sub-caption "Process for Selecting and Nominating Directors", in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference.

ITEM 11. EXECUTIVE COMPENSATION

The information required by this Item with respect to executive compensation and compensation committee matters is included under the caption "Director Compensation", under the caption "Board and Committee Governance", sub-caption "Compensation Committee Interlocks and Insider Participation" and sub-captions "The Board's Role in Risk Oversight" and "Compensation Risk", and under the captions "Compensation Discussion and Analysis", "Compensation Committee Report", "Compensation Tables", "Post-Employment Compensation", "CEO Pay Ratio", and "Pay Versus Performance" in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference.

210

ITEM 12. SECURITY OWNERSHIP OF CERTAIN BENEFICIAL OWNERS AND MANAGEMENT AND RELATED STOCKHOLDER MATTERS

The information required by this Item with respect to security ownership of certain beneficial owners and management is included under the captions "Ownership of Company Securities", including sub-caption "Security Ownership of Certain Shareholders", in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference.

Equity Compensation Plan Information

The following table gives information as of December 31, 2022, about the common stock that may be issued under all our existing equity compensation plans.

Plan Category	(a) Number of securities to be issued upon exercise of outstanding options, warrants and rights	(b) Weighted average exercise price of outstanding options, warrants and rights (5)	(c) Number of securities remaining available for future issuance under equity compensation plans (excluding securities reflected in column (a))
Equity Compensation Plans Approved by Shareholders (1)	3,220,368 (3)	N/A	8,179,702 (6)
Equity Compensation Plans Not Approved by Shareholders (2)	39,463 (4)	N/A	0
Total	3,259,832	N/A	8,179,702

(1)The following plans were approved by our shareholders: Unum Group Stock Incentive Plan of 2007 (2007 Plan), Unum Group 2020 Employee Stock Purchase Plan (ESPP), Unum Group Stock Incentive Plan of 2012 (2012 Plan), Unum European Holding Company Limited Savings-Related Share Option Scheme 2016 (2016 SAYE), Stock Incentive Plan of 2017 (2017 Plan), Unum European Holding Company Limited Savings-Related Share Option Scheme 2021 (2021 SAYE), and Unum Group Stock Incentive Plan of 2022.

(2)The following plan was not approved by our shareholders: Unum Provident Corporation Amended and Restated Non-Employee Director Compensation Plan of 2004 (2004 NED Plan).

(3)Shares of common stock may be issued pursuant to the following outstanding awards subject to the satisfaction of applicable service or performance conditions: 2,579,889 restricted stock units (RSUs) which includes stock success units, 90,117 deferred share rights (including dividend equivalents accrued thereon), and 550,362 performance share units (PSUs) assuming maximum achievement. Shares underlying the outstanding awards are issuable under the 2007 Plan, the 2012 Plan, the 2017 Plan, and the 2022 Plan.

(4)Shares of common stock may be issued pursuant to the following outstanding awards: 36,460 deferred share rights, and 3,003 deferred RSUs, including dividend equivalents accrued thereon, Shares underlying the outstanding awards are issuable under the 2004 NED Plan in accordance with the deferral elections of non-employee directors.

(5)There are no outstanding options, warrants or rights under column (b).

(6)Includes 6,638,737 shares remaining available for future issuance under the 2022 Plan (including in respect of any dividend equivalents accruing on outstanding awards under the other plans on or after the effective date of the 2022 Plan); 1,146,540 shares remaining available for issuance under the ESPP; 194,425 shares remaining available for future issuance under the 2016 SAYE, and 200,000 shares remaining available for future issuance under the 2021 SAYE. Any award outstanding under the 2012 Plan and the 2017 Plan as of the effective date of the 2022 Plan that after such date is not issued because the award is forfeited, terminates, expires, or otherwise lapses without being exercised, or is settled for cash, will be returned to the 2022 Plan. Each PSU, RSU or other full-value award under the 2022 Plan is counted as 1 share.

Below is a brief description of the equity compensation plans not approved by shareholders.

Unum Group Amended and Restated Non-Employee Director Compensation Plan of 2004

This plan provided for the payment of annual retainers and meeting fees as applicable to the non-employee directors who served on our Board of Directors. Under the plan, directors made an irrevocable election each year to receive all or a portion of their

211

retainers and meeting fees in either cash or deferred share rights. A deferred share right is a right to receive one share of common stock on the earlier of (i) the director’s separation from service as a director of the company, or (ii) another designated date at least three years after the date of the deferral election. The number of deferred share rights granted is calculated as the number of whole shares equal to (i) the dollar amount of the annual retainer and/or fees that the director elects to have paid in deferred share rights, divided by (ii) the fair market value per share on the grant date. The aggregate number of shares which can be issued under the plan is 500,000. This plan terminated in May 2010 with respect to new awards, though dividend equivalents remain available for future issuance in respect of awards that were outstanding at that time. The plan is administered by the Human Capital Committee. The plan includes provisions restricting the transferability of the deferred share rights, provisions for adjustments to the number of shares available for grants, and the number of shares subject to outstanding grants in the event of recapitalization, reclassification, stock split, reverse stock split, reorganization, merger, consolidation, or other similar corporate transaction.

ITEM 13. CERTAIN RELATIONSHIPS AND RELATED TRANSACTIONS AND DIRECTOR INDEPENDENCE

The information required by this Item with respect to director independence and transactions with related persons is included under the caption "Corporate Governance", sub-caption "Director Independence", and under the caption "Board and Committee Governance", sub-caption "Related Party Transactions and Policy", in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference.

ITEM 14. PRINCIPAL ACCOUNTING FEES AND SERVICES

The information required by this Item with respect to fees paid to Ernst & Young LLP in 2022 and 2021 and our audit committee's pre-approval policies and procedures are included under the caption "Items to Be Voted On", sub-captions "Independent Auditor Fees" and "Policy for Pre-Approval of Audit and Non-Audit Services", in our definitive proxy statement for the 2023 Annual Meeting of Shareholders and is incorporated herein by reference.

212

PART IV

ITEM 15. EXHIBITS AND FINANCIAL STATEMENT SCHEDULES

(a)	List of Documents filed as part of this report:			Page
	(1)	Financial Statements
		The following report and consolidated financial statements of Unum Group and Subsidiaries are included in Item 8.
		Report of Ernst & Young LLP, Independent Registered Public Accounting Firm		107
		Consolidated Balance Sheets at December 31, 2022 and 2021		109
		Consolidated Statements of Income for the three years ended December 31, 2022		111
		Consolidated Statements of Comprehensive Income (Loss) for the three years ended December 31, 2022		112
		Consolidated Statements of Stockholders' Equity for the three years ended December 31, 2022		113
		Consolidated Statements of Cash Flows for the three years ended December 31, 2022		114
		Notes to Consolidated Financial Statements		115
	(2)	Financial Statement Schedules
		I.	Summary of Investments - Other than Investments in Related Parties	214
		II.	Condensed Financial Information of Registrant	215
		III.	Supplementary Insurance Information	218
		IV.	Reinsurance	221
		V.	Valuation and Qualifying Accounts	222
		Schedules not referred to have been omitted as inapplicable or because they are not required by Regulation S-X.
	(3)	Exhibits
		Index to Exhibits		223

213

SCHEDULE I--SUMMARY OF INVESTMENTS -

OTHER THAN INVESTMENTS IN RELATED PARTIES

as of December 31, 2022

Unum Group and Subsidiaries

Type of Investment	Cost or Amortized Cost (1)		Fair Value		Amount shown on the balance sheet
	(in millions of dollars)
Fixed Maturity Securities:
Bonds
United States Government and Government Agencies and Authorities	$	503.8	$	498.2	$	498.2
States, Municipalities, and Political Subdivisions	4,006.0		3,457.2		3,457.2
Foreign Governments	908.1		827.1		827.1
Public Utilities	5,170.9		4,956.9		4,956.9
Mortgage/Asset-Backed Securities	592.1		573.3		573.3
All Other Corporate Bonds	26,640.3		24,524.6		24,524.6
Redeemable Preferred Stocks	4.0		3.5		3.5
Total Fixed Maturity Securities	37,825.2		34,840.8		34,840.8
Mortgage Loans	2,444.7				2,435.4
Policy Loans	3,601.2				3,601.2
Other Long-term Investments
Derivatives	—				89.1		(2)
Perpetual Preferred Equity Securities	23.1				25.8		(3)
Private Equity Partnerships	1,032.2				1,194.3		(3)
Miscellaneous Long-term Investments	130.9				130.9
Short-term Investments	1,394.8				1,394.8
Total Investments	$	46,452.1			$	43,712.3

(1)The amortized cost for fixed maturity securities and mortgage loans represents original cost reduced by repayments, write-downs from declines in fair value, amortization of premiums, and/or accretion of discounts. The amortized cost for these investments does not include allowance for expected credit losses.

(2)Derivatives are carried at fair value.

(3)The difference between amortized cost and carrying value for private equity partnerships and perpetual preferred equity securities primarily results from changes in the partnership owner's equity and the security's market valuation since acquisition, respectively.

214

SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT

Unum Group (Parent Company)

BALANCE SHEETS

	December 31
	2022		2021
	(in millions of dollars)
Assets
Fixed Maturity Securities - at fair value (amortized cost: $748.1; $826.4)	$	657.7	$	820.8
Other Long-term Investments	19.3		10.3
Short-term Investments	845.8		629.5
Investment in Subsidiaries	11,278.2		13,711.1
Deferred Income Tax	114.9		144.5
Other Assets	555.5		508.1
Total Assets	$	13,471.4	$	15,824.3
Liabilities and Stockholders' Equity
Liabilities
Short-term Debt	$	2.0	$	—
Long-term Debt	3,427.8		3,442.2
Pension and Postretirement Benefits	352.6		507.1
Other Liabilities	491.5		458.6
Total Liabilities	4,273.9		4,407.9
Stockholders' Equity
Common Stock, $0.10 par
Authorized: 725,000,000 shares
Issued: 308,306,490 and 307,334,853 shares	30.8		30.7
Additional Paid-in Capital	2,441.0		2,408.1
Accumulated Other Comprehensive Income (Loss)	(2,756.6)		354.1
Retained Earnings	12,912.1		11,853.2
Treasury Stock - at cost: 110,551,977 and 104,820,670 shares	(3,429.8)		(3,229.7)
Total Stockholders' Equity	9,197.5		11,416.4
Total Liabilities and Stockholders' Equity	$	13,471.4	$	15,824.3

215

SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Continued)

Unum Group (Parent Company)

STATEMENTS OF OPERATIONS

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Cash Dividends from Subsidiaries	$	1,306.6	$	909.8	$	974.6
Non-Cash Dividends from Subsidiaries	23.0		719.6		—
Other Income	81.8		53.5		51.7
Total Revenue	1,411.4		1,682.9		1,026.3
Interest and Debt Expense	188.5		185.9		187.1
Cost Related to Early Retirement of Debt	4.2		67.3		—
Other Expenses	35.6		39.1		51.1
Total Expenses	228.3		292.3		238.2
Income of Parent Company Before Income Tax	1,183.1		1,390.6		788.1
Income Tax Expense (Benefit)	14.7		(24.1)		(15.3)
Income of Parent Company	1,168.4		1,414.7		803.4
Equity in Undistributed Earnings (Loss) of Subsidiaries	145.8		(590.5)		(10.4)
Net Income	1,314.2		824.2		793.0
Other Comprehensive Income (Loss), Net of Tax	(3,110.7)		(20.1)		336.9
Comprehensive Income (Loss)	$	(1,796.5)	$	804.1	$	1,129.9

216

SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Continued)

Unum Group (Parent Company)

STATEMENTS OF CASH FLOWS

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Cash Provided by Operating Activities	$	1,250.2	$	861.0	$	964.0
Cash Flows from Investing Activities
Proceeds from Sales and Maturities of Fixed Maturity Securities	192.1		245.5		138.8
Proceeds from Sales and Maturities of Other Investments	7.4		20.1		46.6
Purchase of Fixed Maturity Securities	(102.7)		(2.0)		(384.7)
Purchase of Other Investments	(32.0)		(0.9)		(22.0)
Net Sales (Purchases) of Short-term Investments	(209.6)		(465.0)		440.6
Cash Distributions to Subsidiaries	(540.2)		(300.9)		(965.5)
Net Purchases of Property and Equipment	(94.0)		(91.3)		(81.6)
Cash Used by Investing Activities	(779.0)		(594.5)		(827.8)
Cash Flows from Financing Activities
Short-term Debt Repayment	—		—		(400.0)
Issuance of Long-term Debt	349.2		588.1		494.1
Long-term Debt Repayment	(364.0)		(500.0)		—
Cost Related to Early Retirement of Debt	(3.6)		(62.8)		—
Issuance of Common Stock	4.0		3.4		4.4
Repurchase of Common Stock	(200.1)		(50.0)		—
Dividends Paid to Stockholders	(254.2)		(239.4)		(231.9)
Other, Net	0.7		(1.6)		(1.4)
Cash Used by Financing Activities	(468.0)		(262.3)		(134.8)
Increase in Cash	$	3.2	$	4.2	$	1.4

217

SCHEDULE III--SUPPLEMENTARY INSURANCE INFORMATION

Unum Group and Subsidiaries

Segment	Deferred Acquisition Costs		Reserves for Future Policy Contract Benefits		Unearned Premiums		Policy and Contract Benefits
	(in millions of dollars)
December 31, 2022
Unum US	$	1,089.4	$	9,129.9	$	50.5	$	1,245.8
Unum International	36.6		2,074.7		130.4		165.2
Colonial Life	1,126.3		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 International	35.4		2,765.5		131.8		171.2
Colonial Life	1,076.3		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

218

SCHEDULE III--SUPPLEMENTARY INSURANCE INFORMATION (Continued)

Unum Group and Subsidiaries

Segment	Premium 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 International	718.8		170.1		564.8		7.6		190.4		504.1
Colonial Life	1,702.0		152.7		803.1		288.5		389.6		1,221.8
Closed Block	944.3		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 International	717.0		132.7		556.2		8.0		180.4		520.6
Colonial Life	1,690.2		172.0		910.4		259.1		364.5		1,223.3
Closed Block	995.8		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 International	652.8		104.6		500.9		7.4		173.0		456.0
Colonial Life	1,712.0		155.7		906.5		257.7		369.2		1,252.4
Closed Block	994.4		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.

219

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.

220

SCHEDULE IV--REINSURANCE

Unum Group and Subsidiaries

	Gross Amount		Ceded to Other Companies		Assumed from Other Companies		Net Amount		Percentage Amount Assumed to Net
	(in millions of dollars)
Year Ended December 31, 2022
Life Insurance in Force	$	1,057,312.2	$	35,773.9	$	931.9	$	1,022,470.2	0.1	%
Premium Income:
Life Insurance	$	2,711.2	$	155.1	$	6.5	$	2,562.6	0.3	%
Accident, Health, and Other Insurance	7,189.3		200.7		72.2		7,060.8		1.0	%
Total	$	9,900.5	$	355.8	$	78.7	$	9,623.4	0.8	%
Year Ended December 31, 2021
Life Insurance in Force	$	1,007,562.2	$	37,794.6	$	920.3	$	970,687.9	0.1	%
Premium Income:
Life Insurance	$	2,550.7	$	150.2	$	7.6	$	2,408.1	0.3	%
Accident, Health, and Other Insurance	7,192.1		202.2		83.0		7,072.9		1.2	%
Total	$	9,742.8	$	352.4	$	90.6	$	9,481.0	1.0	%
Year Ended December 31, 2020
Life Insurance in Force	$	979,755.7	$	41,550.9	$	896.4	$	939,101.2	0.1	%
Premium Income:
Life Insurance	$	2,536.8	$	141.9	$	8.0	$	2,402.9	0.3	%
Accident, Health, and Other Insurance	7,085.1		196.0		86.1		6,975.2		1.2	%
Total	$	9,621.9	$	337.9	$	94.1	$	9,378.1	1.0	%

221

SCHEDULE V--VALUATION AND QUALIFYING ACCOUNTS

Unum Group and Subsidiaries

Description	Balance at Beginning of Year1		Additions Charged to Costs and Expenses		Additions Charged to Other Accounts2		Deductions3		Balance at End of Year
	(in millions of dollars)
Year Ended December 31, 2022
Allowance for expected credit losses (deducted from accounts and premiums receivable)	$	34.2	$	10.8	$	—	$	12.5	$	32.5
Allowance for expected credit losses (deducted from reinsurance recoverable)	$	2.3	$	—	$	—	$	0.6	$	1.7
Year Ended December 31, 2021
Allowance for expected credit losses (deducted from accounts and premiums receivable)	$	38.8	$	18.2	$	—	$	22.8	$	34.2
Allowance for expected credit losses (deducted from reinsurance recoverable)	$	11.7	$	0.7	$	—	$	10.1	$	2.3
Year Ended December 31, 2020
Real Estate reserve (deducted from other long-term investments)	$	0.3	$	—	$	—	$	0.3	$	—
Allowance for expected credit losses (deducted from accounts and premiums receivable)	$	23.8	$	34.2	$	0.1	$	19.3	$	38.8
Allowance for doubtful accounts (deducted from reinsurance recoverable)	$	1.8	$	10.1	$	—	$	0.2	$	11.7

1 In 2020, ASC 326 "Financial Instruments - Credit Losses" was adopted resulting in a beginning balance adjustment of $13.5 million to increase the Allowance for expected credit losses (deducted from accounts and premiums receivable) and a $1.8 million beginning balance adjustment to increase the Allowance for expected credit losses (deducted from reinsurance recoverable).

2 Additions charged to other accounts are comprised of amounts related to fluctuations in the foreign currency exchange rate.

3 Deductions include amounts deemed to reduce exposure of expected losses on premium and accounts receivables and reinsurance recoverable, probable losses on Real Estate reserve, amounts deemed uncollectible, and amounts related to fluctuations in the foreign currency exchange rate.

Certain items not reported above include the allowance for expected credit losses on mortgage loans, the allowance for credit losses on fixed maturity securities, and the deferred tax asset valuation allowance. See Notes 3 and 7 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for a discussion of these items.

222

INDEX TO EXHIBITS

With regard to applicable cross-references in this report, our current, quarterly and annual reports dated on or after May 1, 2003 are filed with the Securities and Exchange Commission under File No. 1-11294 and such reports dated prior to May 1, 2003 are filed with the Securities and Exchange Commission under File No. 1-11834, except as otherwise noted below. Our registration statements have the file numbers noted wherever such statements are identified below.

(2.1)	Master Transaction Agreement, dated December 16, 2020, by and among Provident Life and Accident Insurance Company, The Paul Revere Life Insurance Company, Unum Life Insurance Company of America and Commonwealth Annuity and Life Insurance Company (incorporated by reference to Exhibit 2.1 of Unum Group’s Form 8-K filed on December 17, 2020).
(2.2)	Amended and Restated Reinsurance Agreement, dated March 31, 2021, by and between Provident Life and Accident Insurance Company and Commonwealth Annuity and Life Insurance Company (incorporated by reference to Exhibit 2.1 of Unum Group's Form 8-K filed on April 5, 2021). **
(2.3)	Amended and Restated Reinsurance Agreement, dated March 31, 2021, by and between The Paul Revere Life Insurance Company and Commonwealth Annuity and Life Insurance Company (incorporated by reference to Exhibit 2.2 of Unum Group's Form 8-K filed on April 5, 2021). **
(2.4)	Amended and Restated Reinsurance Agreement, dated March 31, 2021, by and between Unum Life Insurance Company of America and Commonwealth Annuity and Life Insurance Company (incorporated by reference to Exhibit 2.3 of Unum Group's Form 8-K filed on April 5, 2021). **
(3.1)	Amended and Restated Certificate of Incorporation of Unum Group, effective May 24, 2018 (incorporated by reference to Exhibit 3.1 of our Form 8-K filed on May 25, 2018).
(3.2)	Amended and Restated Bylaws of Unum Group, as amended effective February 22, 2022 (incorporated by reference to Exhibit 3.2 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2021).
(4.1)	Indenture for Senior Debt Securities dated as of March 9, 2001 (incorporated by reference to Exhibit 4.1 of our Registration Statement on Form S-3 (Registration No. 333-100953) filed on November 1, 2002).
(4.2)	Second Supplemental Indenture, dated as of June 18, 2002, between Unum Group and JPMorgan Chase Bank, as Trustee (incorporated by reference to Exhibit 4.2 of our Form 8-K filed on June 21, 2002).
(4.3)	Indenture for Senior Debt Securities, dated as of August 23, 2012, between Unum Group and The Bank of New York Mellon Trust Company, N.A., as Trustee (incorporated by reference to Exhibit 4.2 of our Form 8-K filed on August 23, 2012).
(4.4)	First Supplemental Indenture for Senior Debt Securities, between Unum Group and The Bank of New York Mellon Trust Company, N.A. dated as of August 20, 2020 (incorporated by reference to Exhibit 4.4 to Unum Group’s Registration Statement on Form S-3ASR (Registration No. 333-248208) filed on August 20, 2020).
(4.5)	Form of 5.75% Senior Note due 2042 (incorporated by reference to Exhibit 4.1 of our Form 8-K filed on August 23, 2012).
(4.6)	Form of 3.875% Senior Note due 2025 (incorporated by reference to Exhibit 4.1 of our Form 8-K filed on November 5, 2015).
(4.7)	Indenture for Subordinated Debt Securities, dated as of May 29, 2018, between Unum Group and The Bank of New York Mellon Trust Company, N.A., as Trustee (incorporated by reference to Exhibit 4.2 of Unum Group’s Form 8-K filed on May 29, 2018).
(4.8)	Form of 6.250% Junior Subordinated Notes due 2058 (incorporated by reference to Exhibit 4.1 of Unum Group's Form 8-K filed on May 29, 2018).
(4.9)	Form of 4.000% Senior Notes due 2029 (incorporated by reference to Exhibit 4.1 of Unum Group's Form 8-K filed on June 13, 2019).
(4.10)	Form of 4.500% Senior Notes due 2049 (incorporated by reference to Exhibit 4.1 of Unum Group's Form 8-K filed on September 11, 2019).
(4.11)	Form of 4.125% Senior Notes due 2051 (incorporated by reference to Exhibit 4.1 of Unum Group's Form 8-K filed on June 14, 2021).
(4.12)	Description of the Company’s Securities Registered Pursuant to Section 12 of the Securities Exchange Act of 1934.
Certain instruments defining the rights of holders of long-term debt securities of our company and our subsidiaries are omitted pursuant to Item 601(b)(4)(iii) of Regulation S-K. We hereby undertake to furnish to the Securities and Exchange Commission, upon request, copies of any such instruments.

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(10.1)	Agreement between Provident Companies, Inc. and certain subsidiaries and American General Corporation and certain subsidiaries dated as of December 8, 1997 (incorporated by reference to Exhibit 10.18 of Provident Companies Inc.'s Form 10-Q for fiscal quarter ended September 30, 1998).
(10.2)	Form of Change in Control Severance Agreement, effective April 25, 2011 (incorporated by reference to Exhibit 10.3 of our Form 10-K for the fiscal year ended December 31, 2014). *
(10.3)	Form of Change in Control Severance Agreement, effective January 1, 2015 (incorporated by reference to Exhibit 10.4 of our Form 10-K for the fiscal year ended December 31, 2014). *
(10.4)	Form of Change in Control Severance Agreement, effective August 14, 2018 (incorporated by reference to Exhibit 10.5 of our Form 10-K for the fiscal year ended December 31, 2018). *
(10.5)	Unum Group Supplemental Pension Plan, as amended and restated effective January 1, 2010 (incorporated by reference to Exhibit 10.6 of our Form 10-K for the fiscal year ended December 31, 2013). *
(10.6)	First Amendment to the Unum Group Supplemental Pension Plan, effective as of June 17, 2013 (incorporated by reference to Exhibit 10.7 of our Form 10-K for the fiscal year ended December 31, 2013). *
(10.7)	Second Amendment to the Unum Group Supplemental Pension Plan, effective as of December 31, 2013 (incorporated by reference to Exhibit 10.8 of our Form 10-K for the fiscal year ended December 31, 2013). *
(10.8)	Third Amendment to the Unum Group Supplemental Pension Plan, effective as of January 1, 2013 (incorporated by reference to Exhibit 10.8 of our Form 10-K for the fiscal year ended December 31, 2015). *
(10.9)	Fourth Amendment to the Unum Group Supplemental Pension Plan, effective as of January 1, 2021. (incorporated by reference to Exhibit 10.9 of Unum Group's Form 10-K filed on February 17, 2021). *
(10.10)	Administrative Reinsurance Agreement between Provident Life and Accident Insurance Company and Reassure America Life Insurance Company dated to be effective July 1, 2000 (incorporated by reference to Exhibit 10.1 of our Form 8-K filed on March 2, 2001).
(10.11)	Unum Group Amended and Restated Non-Employee Director Compensation Plan of 2004, as amended (incorporated by reference to Exhibit 10.19 of our Form 10-K for the fiscal year ended December 31, 2008). *
(10.12)	California Settlement Agreement (incorporated by reference to Exhibit 10.1 of our Form 8-K filed on October 3, 2005).
(10.13)	Amendment to Regulatory Settlement Agreement (incorporated by reference to Exhibit 10.2 of our Form 8‑K filed on October 3, 2005).
(10.14)	Unum Group Stock Incentive Plan of 2007, as amended (incorporated by reference to Exhibit 10.26 of our Form 10-K for the fiscal year ended December 31, 2008). *
(10.15)	Severance Pay Plan for Executive Vice Presidents (EVPs) (incorporated by reference to Exhibit 10.15 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2019). *
(10.16)	Unum Group Stock Incentive Plan of 2012 (incorporated by reference to Appendix A of our Definitive Proxy Statement on Schedule 14A filed on April 12, 2012). *
(10.17)	Unum Group Non-Qualified Defined Contribution Retirement Plan, effective January 1, 2014 (incorporated by reference to Exhibit 10.31 of our Form 10-K for the fiscal year ended December 31, 2013). *
(10.18)	First Amendment to Unum Group Non-Qualified Defined Contribution Retirement Plan, effective as of January 1, 2019. (incorporated by reference to exhibit 10.19 of Unum Group's Form 10-K filed on February 17, 2021). *
(10.19)	Second Amendment to Unum Group Non-Qualified Defined Contribution Retirement Plan, effective as of January 1, 2020 (incorporated by reference to Exhibit 10.20 to Unum Group's Form 10-K filed on February 17, 2021). *
(10.20)	Second Amended and Restated Credit Agreement, dated as of April 15, 2022, among Unum Group, Unum Life Insurance Company of America, Provident Life and Accident Insurance Company, and Colonial Life & Accident Insurance Company, as Borrowers, the Lenders named therein, and Wells Fargo Bank, National Association, as Administrative Agent, L/C Agent, Fronting Bank and Swingline Lender (incorporated by reference to Exhibit 10.1 of Unum Group's Form 8-K filed on April 21, 2022).
(10.21)	Letter Agreement with Richard P. McKenney, dated January 30, 2015 (incorporated by reference to Exhibit 10.1 of our Form 8-K filed on February 3, 2015). *

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(10.22)	Severance Agreement between Unum Group and Richard P. McKenney, dated effective as of April 1, 2015 (incorporated by reference to Exhibit 10.2 of our Form 8-K filed on February 3, 2015). *
(10.23)	Amended and Restated Aircraft Time-Sharing Agreement between Unum Group and Richard P. McKenney, dated as of August 9, 2019. (incorporated by reference to Exhibit 10.1 of our Form 10-Q filed on October 30, 2019).
(10.24)	Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit A of Unum Group's definitive proxy statement on Schedule 14A filed on April 13, 2017). *
(10.25)	Form of Restricted Stock Unit Agreement with Non-Employee Director for awards under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.2 of Unum Group's Form 8-K filed on May 25, 2017). *
(10.26)	Form of Restricted Stock Unit Agreement with Employee in U.S. for awards in 2020 under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.37 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2019). *
(10.27)	Form of Cash-Settled Restricted Stock Unit Agreement with Employee in U.S. for awards in 2020 under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.38 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2019). *
(10.28)	Form of Restricted Stock Unit Agreement with Employee in U.K. for awards in 2020 under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.39 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2019). *
(10.29)	Form of Performance Share Unit Agreement with Employee in U.S. for awards in 2020 under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.1 of Unum Group’s Form 10-Q filed on May 5, 2020). *
(10.30)	Form of Performance Share Unit Agreement with Employee in U.K. for awards in 2020 under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.2 of Unum Group’s Form 10-Q filed on May 5, 2020). *
(10.31)	Annual Incentive Plan of Unum Group, amended and restated effective January 1, 2023. *
(10.32)	Unum Group 2020 Employee Stock Purchase Plan (incorporated by reference to Exhibit 10.1 of Unum Group’s Form 8-K filed on June 2, 2020). *
(10.33)	Form of Success Incentive Plan Cash Success Unit and Stock Success Unit Agreement with Employee in U.S. (incorporated by reference to Exhibit 10.1 of Unum Group's Form 8-K filed on August 26, 2020). *
(10.34)	Form of Success Incentive Plan Cash Success Unit and Stock Success Unit Agreement with Employee in U.K. (incorporated by reference to Exhibit 10.2 of Unum Group's Form 8-K filed on August 26, 2020). *
(10.35)	Form of Restricted Stock Unit Agreement with Executive in U.S. for awards in 2021 under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.44 of Unum Group's Form 10-K for the fiscal year ended December 31, 2020). *
(10.36)	Form of Restricted Stock Unit Agreement with Executive in U.K. for awards in 2021 under the Unum Group Stock Incentive Plan of 2017 (incorporated by reference to Exhibit 10.45 of Unum Group's Form 10-K for the fiscal year ended December 31, 2020). *
(10.37)	Form of Cash Incentive Unit Agreement (for employee in the U.S.) (incorporated by reference to Exhibit 10.1 of Unum Group's Form 8-K filed on March 2, 2021). *
(10.38)	Form of Cash Incentive Unit Agreement (for employee in the U.K.) (incorporated by reference to Exhibit 10.2 of Unum Group's Form 8-K filed on March 2, 2021). *
(10.39)	Form of Restricted Stock Unit Agreement with Executive in U.S. for awards in 2022 (incorporated by reference to Exhibit 10.44 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2021). *
(10.40)	Form of Restricted Stock Unit Agreement with Executive in U.K. for awards in 2022 (incorporated by reference to Exhibit 10.45 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2021). *
(10.41)	Form of Cash Incentive Unit Agreement (for employee in the U.S.) for awards in 2022 (incorporated by reference to Exhibit 10.46 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2021). *
(10.42)	Form of Cash Incentive Unit Agreement (for employee in the U.K.) for awards in 2022 (incorporated by reference to Exhibit 10.47 of Unum Group’s Form 10-K for the fiscal year ended December 31, 2021). *

225

(10.43)	Unum Group 2022 Stock Incentive Plan (incorporated by reference to Exhibit 99.1 of Unum Group’s Registration Statement on Form S-8 (Registration No. 333-265246) filed on May 26, 2022). *
(10.44)	Form of Restricted Stock Unit Agreement with Non-Employee Director for awards under the Unum Group 2022 Stock Incentive Plan (incorporated by reference to Exhibit 10.2 of Unum Group's Form 10-Q filed on August 3, 2022). *
(10.45)	Form of Restricted Stock Unit Agreement with Executive in U.S. for awards in 2023. *
(10.46)	Form of Restricted Stock Unit Agreement with Executive in U.K. for awards in 2023. *
(10.47)	Form of Cash Incentive Unit Agreement (for employee in the U.S.) for awards in 2023. *
(10.48)	Form of Cash Incentive Unit Agreement (for employee in the U.K.) for awards in 2023. *
(21)	Subsidiaries of the Registrant.
(23)	Consent of Independent Registered Public Accounting Firm.
(24)	Power of Attorney.
(31.1)	Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
(31.2)	Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002.
(32.1)	Certification of Chief Executive Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
(32.2)	Certification of Chief Financial Officer pursuant to 18 U.S.C. Section 1350 as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002.
(101)	The following financial statements from Unum Group's Annual Report on Form 10-K for the year ended December 31, 2022, filed on February 23, 2023, formatted in XBRL: (i) Consolidated Balance Sheets, (ii) Consolidated Statements of Income, (iii) Consolidated Statements of Comprehensive Income (Loss), (iv) Consolidated Statements of Stockholders' Equity, (v) Consolidated Statements of Cash Flows, (vi) the Notes to Consolidated Financial Statements, (vii) Financial Statement Schedules.
(104)	Cover Page Interactive Data File (embedded within the Inline XBRL document).
___________
*	Management contract or compensatory plan required to be filed as an exhibit to this form pursuant to Item 15(c) of Form 10-K.
**	Certain confidential information contained in this exhibit has been omitted because it (i) is not material and (ii) would likely cause competitive harm to Unum Group or its subsidiaries if it were to be publicly disclosed.

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SIGNATURES

Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

Unum Group
(Registrant)
By:	/s/ Richard P. McKenney
	Richard P. McKenney
	President and Chief Executive Officer
Date:	February 23, 2023

Pursuant to the requirements of the Securities Exchange Act of 1934, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

Name Title Date

/s/ Richard P. McKenney	President and Chief Executive Officer	February 23, 2023
Richard P. McKenney	and a Director (principal executive officer)
/s/ Steven A. Zabel	Executive Vice President, Chief Financial Officer	February 23, 2023
Steven A. Zabel	(principal financial officer)
/s/ Walter L. Rice, Jr.	Senior Vice President, Chief Accounting Officer	February 23, 2023
Walter L. Rice, Jr.	(principal accounting officer)

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Name	Title	Date
*	Director	February 23, 2023
Theodore H. Bunting, Jr.
*	Director	February 23, 2023
Susan L. Cross
*	Director	February 23, 2023
Susan D. DeVore
*	Director	February 23, 2023
Joseph J. Echevarria
*	Director	February 23, 2023
Cynthia L. Egan
*	Director	February 23, 2023
Kevin T. Kabat
*	Director	February 23, 2023
Timothy F. Keaney
*	Director	February 23, 2023
Gale V. King
*	Director	February 23, 2023
Gloria C. Larson
*	Director	February 23, 2023
Ronald P. O'Hanley
*	Director	February 23, 2023
Francis J. Shammo
* By: /s/ J. Paul Jullienne		February 23, 2023
J. Paul Jullienne
Attorney-in-Fact

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EX-4.12

Exhibit 4.12

DESCRIPTION OF REGISTRANT’S SECURITIES REGISTERED PURSUANT TO

SECTION 12 OF THE SECURITIES EXCHANGE ACT OF 1934

As of the date of this Annual Report on Form 10-K of which this exhibit is a part, we have two classes of securities registered pursuant to Section 12 of the Securities Exchange Act of 1934, as amended (the “Exchange Act”): (1) our common stock, par value $0.10 per share, and (2) our 6.250% junior subordinated notes due 2058.

Except as otherwise indicated or the context otherwise requires, as used in this exhibit, the terms “Company,” “we,” “us” and “our” mean Unum Group and do not include its subsidiaries.

DESCRIPTION OF COMMON STOCK

The following is a brief description of our common stock. The following description may not be complete and is subject to, and qualified in its entirety by reference to, the terms and provisions of our amended and restated certificate of incorporation and our amended and restated bylaws, which are exhibits to this Annual Report on Form 10-K.

General

Under our amended and restated certificate of incorporation, we are authorized to issue a total of 725,000,000 shares of common stock having a par value of $.10 per share. All outstanding shares of common stock are fully paid and nonassessable. The common stock is listed on the New York Stock Exchange and trades under the symbol “UNM.”

Holders of common stock do not have any conversion, redemption, preemptive or cumulative voting rights. In the event of our dissolution, liquidation or winding-up, common stockholders will share ratably in any assets remaining after all creditors are paid in full, including holders of our debt securities, and after the liquidation preference of holders of preferred stock has been satisfied.

Dividends

Holders of common stock are entitled to participate equally in dividends when the board of directors declares dividends on shares of common stock out of funds legally available for dividends. The rights of holders of common stock to receive dividends are subject to the preferences of holders of preferred stock.

Voting Rights

Holders of common stock are entitled to one vote for each share held of record on all matters voted on by stockholders, including the election of directors.

Liquidation Rights

In the event of our liquidation, dissolution or winding-up, holders of common stock have the right to a ratable portion of assets remaining after satisfaction in full of the prior rights of our creditors, all liabilities, and the total liquidation preferences of any outstanding shares of preferred stock.

Certain Provisions That May Have an Anti-Takeover Effect

Our amended and restated certificate of incorporation and amended and restated bylaws, and certain portions of Delaware law, contain certain provisions that may have an anti-takeover effect.

Special Meetings of Stockholders. A special meeting of our stockholders may be called only by the chairman of the board of directors, the chief executive officer, the president, or the lead independent director or by the secretary at the direction of a majority of the board or upon the written request(s) of one or more stockholders of record who own in the aggregate not less than 25% of the total number of outstanding shares of capital stock entitled to vote on the item(s) of business to be brought before the proposed special meeting as of the date of the request(s).

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Advance Notice Requirements for Nomination of Directors and Presentation of New Business at Meetings. Our amended and restated bylaws establish advance notice procedures for stockholder proposals concerning nominations for election to the board of directors and new business to be brought before meetings of stockholders. These procedures require that notice of such stockholder proposals must be timely given in writing to our corporate secretary prior to the meeting at which the action is to be taken. To be timely, we must receive the notice at our principal executive offices within certain dates prior to the anniversary date of the annual meeting of stockholders before the one in which the stockholder proposal is to be considered. The notice must contain information required by the amended and restated bylaws. These provisions make it procedurally more difficult for a stockholder to place a proposed nomination or new business proposal on the meeting agenda and therefore may reduce the likelihood that a stockholder will seek to take independent action to replace directors or with respect to other matters that are not supported by management.

Action of Stockholders Without a Meeting. Any action of our stockholders may be taken at a meeting only and may not be taken by written consent.

Delaware Anti-Takeover Law. Section 203 of the Delaware General Corporation Law generally prohibits a publicly held Delaware corporation, such as our company, from engaging in a business combination, such as mergers, sales and leases of assets, issuances of securities and similar transactions by a corporation or subsidiary with an interested stockholder including a person or group who beneficially owns 15% or more of the corporation’s voting stock for a period of three years following the date the person became an interested stockholder, unless (with certain exceptions) the business combination or the transaction in which the person became an interested stockholder is approved in a prescribed manner.

The provisions described above may discourage attempts by others to acquire control of us without negotiation with our board of directors. This enhances our board of directors' ability to attempt to promote the interests of all of our stockholders. However, to the extent that these provisions make us a less attractive takeover candidate, they may not always be in our best interests or in the best interests of our stockholders. None of these provisions is the result of any specific effort by a third party to accumulate our securities or to obtain control of us by means of merger, tender offer, solicitation in opposition to management or otherwise.

Restriction on Ownership Under Insurance Laws

Most states, including the states in which our insurance company subsidiaries are domiciled, have laws and regulations that require regulatory approval of a change in control of an insurer or an insurer’s holding company. Where such laws and regulations apply to us and our insurance company subsidiaries, there can be no effective change in control unless the person seeking to acquire control has filed a statement with specified information with the insurance regulators and has obtained prior approval for the proposed change in control from such regulators. The usual measure for a presumptive change in control pursuant to these laws is the acquisition of 10% or more of the voting stock of an insurance company or its parent, although this presumption is rebuttable. Consequently, a person may not acquire 10% or more of our common stock without the prior approval of the insurance regulators in the states in which we and our insurance company subsidiaries are domiciled.

Transfer Agent and Registrar

The transfer agent and registrar for shares of the common stock is Computershare Investor Services.

2

DESCRIPTION OF THE 6.250% JUNIOR SUBORDINATED NOTES

The following is a brief description of the material terms of our 6.250% junior subordinated notes due 2058 (the “junior subordinated notes”) and the subordinated indenture described below. The following description may not be complete and is subject to, and qualified in its entirety by reference to, the terms and provisions of the subordinated indenture dated as of May 29, 2018 (the “subordinated indenture”), between us and The Bank of New York Mellon Trust Company, N.A., as trustee (the “trustee”), and the form of junior subordinated notes, which are exhibits to this Annual Report on Form 10-K.

General

We initially issued $300 million aggregate principal amount of junior subordinated notes under the subordinated indenture. The junior subordinated notes were issued only in denominations of $25 and integral multiples of $25 in excess thereof. As of December 31, 2022, $300 million aggregate principal amount of the junior subordinated notes was outstanding.

We listed the junior subordinated notes on the New York Stock Exchange.

The junior subordinated notes will mature on June 15, 2058 (the “maturity date”). The trustee will act as paying agent for the junior subordinated notes.

We may, without the consent of the holders, reopen the series of junior subordinated notes and issue additional junior subordinated notes under the subordinated indenture with the same terms (other than the issue date, the public offering price and, if applicable, the initial interest payment date and initial interest accrual date) and with the same CUSIP number as the junior subordinated notes offered hereby in an unlimited aggregate principal amount, provided that no additional junior subordinated notes may be issued unless they will be fungible with the junior subordinated notes for U.S. federal income tax and securities law purposes.

“business day” means, with respect to the junior subordinated notes, any day other than (i) a Saturday or Sunday, or (ii) a day that in the Borough of Manhattan, The City of New York is either a legal holiday or a day on which the federal or state banking institutions located therein are authorized or obligated by law, executive order or regulation to close.

The junior subordinated notes are not entitled to any sinking fund.

The junior subordinated notes and the subordinated indenture are governed by the laws of the State of New York.

Interest Rate and Interest Rate Payment Dates

The junior subordinated notes bear interest at the annual rate of 6.250%, and we pay accrued interest quarterly in arrears on March 15, June 15, September 15 and December 15 of each year, subject to our rights and obligations under “—Option to Defer Interest Payments”. We refer to these dates as “interest payment dates” and we refer to the period from and including May 29, 2018 to but excluding the first interest payment date and each successive period from and including an interest payment date to but excluding the next interest payment date as an “interest period”.

Interest payments will be made to the persons or entities in whose names the junior subordinated notes are registered at the close of business on March 1, June 1, September 1 or December 1 (whether or not a business day), as the case may be, immediately preceding the relevant interest payment date. The amount of interest payable for any interest period will be computed on the basis of a 360-day year consisting of twelve 30-day months. In the event that any interest payment date falls on a day that is not a business day, the interest payment due on that date will be postponed to the next day that is a business day, and no additional interest will accrue as a result of that postponement.

Subordination

The junior subordinated notes are unsecured, subordinated and junior in right of payment to all of Unum Group’s existing and future senior debt and will rank pari passu with all of Unum Group’s 7.405% Junior Subordinated Deferrable Interest Debentures, Series A. In addition, the junior subordinated notes are structurally subordinated to any indebtedness of our subsidiaries. As of December 31, 2022, the aggregate amount of indebtedness of our subsidiaries (excluding intercompany liabilities) was approximately $189.7 million.

3

Upon any distribution to our creditors in a liquidation, dissolution, bankruptcy, insolvency or reorganization, the payment of the principal of, premium, if any, and interest on the junior subordinated notes will be subordinated to the extent provided in the subordinated indenture in right of payment to the prior payment in full of all of Unum Group’s senior debt, but our obligation to make payment of the principal of and interest on the junior subordinated notes will not otherwise be affected. No payment of principal, premium, if any, or interest may be made on the junior subordinated notes at any time in the event there shall have occurred and be continuing a default in any payment with respect to senior debt, or an event of default with respect to any senior debt resulting in the acceleration of the maturity thereof, or if any judicial proceeding shall be pending with respect to any such default and we receive notice of the default.

We may resume payments on the junior subordinated notes when the default is cured or waived if the subordination provisions of the subordinated indenture otherwise permit payment at that time. After all senior debt is paid in full and until the junior subordinated notes are paid in full, holders of the junior subordinated notes will be subrogated to the rights of holders of senior debt to the extent that distributions otherwise payable to holders of junior subordinated notes have been applied to the payment of senior debt. By reason of such subordination, in the event of a distribution of assets upon insolvency, certain of Unum Group’s general creditors may recover more, ratably, than holders of the junior subordinated notes.

Senior debt is defined as the principal, premium, if any, unpaid interest (including interest accruing on or after the filing of any petition in bankruptcy or for reorganization relating to Unum Group whether or not a claim for post-filing interest is allowed in such proceeding), fees, charges, expenses, reimbursement and indemnification obligations, and all other amounts payable under or in respect of the following, whether any such indebtedness exists as of the date of the subordinated indenture or is created, incurred, assumed or guaranteed after such date:

(1)any debt:

•for money we borrowed, or

•evidenced by a bond, note, debenture, or similar instrument (including purchase money obligations) given in connection with the acquisition of any business, property or assets, whether by purchase, merger, consolidation or otherwise, but shall not include any account payable or other obligation created or assumed in the ordinary course of business in connection with the obtaining of materials or services, or

•which is a direct or indirect obligation which arises as a result of banker’s acceptances or bank letters of credit issued to secure our obligations, or to secure the payment of revenue bonds issued for our benefit, whether contingent or otherwise;

(2)any debt of others described in (1) which we have guaranteed or for which we are otherwise liable;

(3)our obligation as lessee under any lease of property which is reflected on our balance sheet as a capitalized lease; and

(4)any deferral, amendment, renewal, extension, supplement or refunding of any liability of the kind described in any of (1), (2), and (3);

except that in computing our indebtedness, the following are not included in such computation:

•any particular indebtedness if, upon or prior to the maturity thereof, there shall have been deposited with a depository in trust money (or evidence of indebtedness if permitted by the instrument creating such indebtedness) in the necessary amount to pay, redeem or satisfy such indebtedness as it becomes due, and the amount so deposited shall not be included in any computation of our assets;

•any indebtedness, obligation or liability referred to in (1) through (4) above as to which, in the instrument creating or evidencing the same or pursuant to which the same is outstanding, it is provided that such indebtedness, obligation or liability is not superior in right of payment to the junior subordinated notes, or ranks pari passu with the junior subordinated notes;

•any indebtedness, obligation or liability which is subordinated to Unum Group’s indebtedness to substantially the same extent as or to a greater extent than the junior subordinated notes are subordinated;

4

•any indebtedness to one of our subsidiaries;

•our 7.405% Junior Subordinated Deferrable Interest Debentures, Series A; and

•the junior subordinated notes.

Optional Redemption

The junior subordinated notes are redeemable at our election on or after June 15, 2023 or within 90 days after the occurrence of certain events prior to June 15, 2023, in each case at the applicable redemption price set forth below and are not subject to any sinking fund or similar provisions.

We may redeem the junior subordinated notes:

•in whole at any time or in part from time to time on or after June 15, 2023 at a redemption price per $25 principal amount of such junior subordinated notes equal to 100% of their principal amount plus accrued and unpaid interest to but excluding the date of redemption; provided that if the junior subordinated notes are not redeemed in whole, at least $25 million aggregate principal amount of the junior subordinated notes, excluding any junior subordinated notes held by Unum Group or any of our affiliates, must remain outstanding after giving effect to such redemption;

•in whole, but not in part, at any time prior to June 15, 2023, within 90 days after the occurrence of a “tax event”, a “regulatory capital event” or a “rating agency event” at a redemption price per $25 principal amount of such junior subordinated notes equal to (i) in the case of a “tax event” or a “regulatory capital event”, 100% of their principal amount or (ii) in the case of a “rating agency event”, 102% of their principal amount, in each case plus accrued and unpaid interest to but excluding the date of redemption.

In either case, such amounts will be calculated by us.

“Tax event” means the receipt by Unum Group of an opinion of independent counsel experienced in such matters to the effect that, as a result of any:

•amendment to or change (including any officially announced proposed change) in the laws or regulations of the United States or any political subdivision or taxing authority of or in the United States that is enacted or effective on or after the initial issuance of the junior subordinated notes;

•official administrative decision or judicial decision or administrative action or other official pronouncement (including a private letter ruling, technical advice memorandum or other similar pronouncement) by any court, government agency or regulatory authority that reflects an amendment to, or change in, the interpretation or application of those laws or regulations that is announced on or after the initial issuance of the junior subordinated notes; or

•threatened challenge asserted in connection with an audit of Unum Group, or a threatened challenge asserted in writing against any taxpayer that has raised capital through the issuance of securities that are substantially similar to the junior subordinated notes, which challenge is asserted against Unum Group or becomes publicly known on or after the initial issuance of the junior subordinated notes;

there is more than an insubstantial increase in the risk that interest payable by Unum Group on the junior subordinated notes is not, or within 90 days of the date of such opinion will not be, deductible by Unum Group, in whole or in part, for U.S. federal income tax purposes; provided that a change of tax law under section 163(j) of the Internal Revenue Code of 1986, as amended (“section 163(j)”) (including any amendment to section 163(j), and any amendment to or the issuance of regulations or another official administrative pronouncement under section 163(j)), shall not give rise to a “tax event” unless, in the opinion of independent counsel experienced in such matters, the change of tax law under section 163(j) limits, defers or prohibits the deduction of interest on the junior subordinated notes in a manner or to an extent different from interest on senior debt obligations of ours by reason of the specific characteristics of the junior subordinated.

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“Rating agency event” means that any nationally recognized statistical rating organization within the meaning of Section 3(a)(62) under the Securities Exchange Act of 1934, as amended, that then publishes a rating for Unum Group (a “rating agency”) amends, clarifies or changes the criteria it uses to assign equity credit to securities such as the junior subordinated notes, which amendment, clarification or change results in:

•the shortening of the length of time the junior subordinated notes are assigned a particular level of equity credit by that rating agency as compared to the length of time they would have been assigned that level of equity credit by that rating agency or its predecessor on the initial issuance of the junior subordinated notes; or

•the lowering of the equity credit (including up to a lesser amount) assigned to the junior subordinated notes by that rating agency as compared to the equity credit assigned by that rating agency or its predecessor on the initial issuance of the junior subordinated notes.

“Regulatory capital event” means that we become subject to capital adequacy supervision by a capital regulator and the capital adequacy guidelines that apply to us as a result of being so subject set forth criteria pursuant to which the full principal amount of the junior subordinated notes would not qualify as capital under such capital adequacy guidelines, as we may determine at any time, in our sole discretion.

Notice of any redemption will be mailed at least 30 but not more than 60 days before the redemption date to each holder of record of the junior subordinated notes to be redeemed at its registered address. The notice of redemption for the junior subordinated notes will state, among other things, the amount of the junior subordinated notes to be redeemed, the redemption date, the manner of calculation of the redemption price and the place or places that payment will be made upon presentation and surrender of the junior subordinated notes to be redeemed. If less than all of the junior subordinated notes are to be redeemed at our option, the trustee will select, in a manner it deems fair and appropriate, the junior subordinated notes, or portions of the junior subordinated notes, to be redeemed, or if the junior subordinated notes are in global form, in accordance with the procedures of DTC. Unless we default in the payment of the redemption price, interest will cease to accrue on any junior subordinated notes that have been called for redemption at the redemption date.

We may not redeem the junior subordinated notes in part unless all accrued and unpaid interest, including deferred interest, has been paid in full on all outstanding junior subordinated notes for all interest periods terminating on or before the redemption date.

Neither we nor the trustee will be required (i) to issue, register the transfer of or exchange any junior subordinated notes during a period beginning at the opening of business 15 days before the day of the delivery of a notice to holders of redemption of the junior subordinated notes selected for redemption and ending at the close of business on the day of such mailing, or (ii) to register the transfer of or exchange any junior subordinated notes so selected for redemption in whole or in part, except the unredeemed portion of any such junior subordinated notes being redeemed in part.

Option to Defer Interest Payments

So long as no event of default with respect to the junior subordinated notes has occurred and is continuing, we may elect at one or more times to defer payment of interest on the junior subordinated notes for one or more consecutive interest periods that do not exceed five years. We may not defer interest beyond the maturity date, any earlier accelerated maturity date arising from an event of default (which, under the subordinated indenture, is limited to certain events of bankruptcy, insolvency or receivership involving Unum Group) or any other earlier redemption of the junior subordinated notes.

During a deferral period, interest will continue to accrue on the junior subordinated notes, and deferred interest on the junior subordinated notes will bear additional interest at the interest rate, compounded on each interest payment date, subject to applicable law. As used herein, a “deferral period” refers to the period beginning on an interest payment date with respect to which we defer interest and ending on the earlier of (i) the fifth anniversary of that interest payment date and (ii) the next interest payment date on which we have paid all deferred and unpaid amounts (including compounded interest on such deferred amounts) and all other accrued interest on the junior subordinated notes. When we use the term “interest” in this summary, we are referring not only to regularly scheduled interest payments but also to interest on interest payments not paid on the applicable interest payment date.

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At the end of five years following the commencement of a deferral period, we must pay all accrued and unpaid deferred interest, including compounded interest. If we have paid all deferred interest (including compounded interest thereon) on the junior subordinated notes, we can again defer interest payments on the junior subordinated notes as described above.

We will give the holders of the junior subordinated notes and the trustee written notice of our election to commence or continue a deferral period at least five and not more than 60 business days before the next interest payment date.

We have no present intention to defer interest payments.

Dividend and Other Payment Stoppages During Deferral Periods and Under Certain Other Circumstances

We have agreed in the subordinated indenture that, so long as any junior subordinated notes remain outstanding, if we have given notice of our election to defer interest payments on the junior subordinated notes but the related deferral period has not yet commenced, or a deferral period is continuing; then we will not, nor will we permit our subsidiaries to:

•declare or pay any dividends or distributions on, or redeem, purchase, acquire or make a liquidation payment with respect to, any shares of our capital stock;

•make any payment of principal of, or interest or premium, if any, on, or repay, purchase or redeem any of our debt securities that rank upon our liquidation on a parity with or junior to the junior subordinated notes; or

•make any guarantee payments regarding any guarantee issued by Unum Group of securities of any of our subsidiaries if the guarantee ranks upon our liquidation on a parity with or junior to the junior subordinated notes.

The restrictions listed above do not apply to:

•any purchase, redemption or other acquisition of shares of our capital stock in connection with:

◦any employment contract, benefit plan or other similar arrangement with or for the benefit of any one or more employees, officers, directors, consultants or independent contractors;

◦the satisfaction of our obligations pursuant to any contract entered into prior to the beginning of the applicable deferral period;

◦a dividend reinvestment or shareholder purchase plan; or

◦the issuance of our capital stock, or securities convertible into or exercisable for such capital stock, as consideration in an acquisition transaction, the definitive agreement for which is entered into prior to the applicable deferral period;

•any exchange, redemption or conversion of any class or series of our capital stock, or the capital stock of one of our subsidiaries, for any other class or series of our capital stock, or of any class or series of our indebtedness for any class or series of our capital stock;

•any purchase of fractional interests in shares of our capital stock pursuant to the conversion or exchange provisions of such capital stock or the securities being converted or exchanged;

•any declaration of a dividend in connection with any shareholder rights plan, or the issuance of rights, stock or other property under any shareholder rights plan, or the redemption or purchase of rights pursuant thereto;

•any dividend in the form of stock, warrants, options or other rights where the dividend stock or stock issuable upon exercise of such warrants, options or other rights is the same stock as that on which the dividend is being paid or ranks equally with or junior to such stock; or

•(i) any payment of current or deferred interest on parity securities that is made pro rata to the amounts due on such parity securities (including the junior subordinated notes) and (ii) any payment of principal or current or deferred

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interest on parity securities that, if not made, would cause Unum Group to breach the terms of the instrument governing such parity securities.

For the avoidance of doubt, no terms of the junior subordinated notes will restrict in any manner the ability of any of our subsidiaries to pay dividends or make any distributions to us or to any of our other subsidiaries.

Events of Default; Notice and Waiver

An “event of default” with respect to the junior subordinated notes shall occur only upon certain events of bankruptcy, insolvency or receivership involving Unum Group.

The subordinated indenture refers to breaches that are not “events of default” as “defaults”. They include, among other things:

•the failure to pay interest, including compounded interest, in full on any junior subordinated notes for a period of 30 days after the conclusion of a five-year period following the commencement of any deferral period if such deferral period has not ended prior to the conclusion of such five-year period;

•the failure to pay principal of or premium, if any, on the junior subordinated notes when due; or

•a failure to comply with our covenants under the subordinated indenture.

A “default” also includes, for example, a failure to pay interest within 30 days of the relevant interest payment date if we do not give a timely written notice of our election to commence or continue a deferral period. If we do not give a timely written notice of our election to commence or continue a deferral period and fail to pay interest within 30 days of the relevant interest payment date, any holder of junior subordinated notes may seek to enforce our obligation to make the missed interest payment, including through legal process. However, there is no right of acceleration except upon the occurrence of an event of default as described above.

If we do give a timely written notice of our election to commence or continue a deferral period on any interest payment date (and, if such notice continues a deferral period, the deferral period has not continued for five years), then no “default” arises from our non-payment of interest on such interest payment date.

The subordinated indenture provides that the trustee must give holders notice of all defaults or events of default within 90 days after it becomes actually known to a responsible officer of the trustee. However, except in the case of a default in payment on the junior subordinated notes, the trustee will be protected in withholding the notice if its responsible officers determine that withholding of the notice is in the interest of such holders.

If an event of default under the subordinated indenture occurs, the entire principal amount of the junior subordinated notes will automatically become due and payable without any declaration or other action on the part of the trustee or any holder of the junior subordinated notes. There is no right of acceleration in the case of any payment default or other breaches of covenants under the subordinated indenture or the junior subordinated notes.

Notwithstanding the foregoing, in the case of a default in the payment of principal of or interest on the junior subordinated notes including any compound interest (and, in the case of payment of deferred interest, such failure to pay shall have continued for 30 calendar days after the conclusion of the deferral period), the holder of a junior subordinated note may, or if directed by the holders of a majority in principal amount of the junior subordinated notes the trustee shall, subject to the conditions set forth in the subordinated indenture, demand payment of the amount then due and payable and may institute legal proceedings for the collection of such amount if we fail to make payment thereof upon demand.

The holders of a majority in aggregate principal amount of the outstanding junior subordinated notes may waive any past default, except:

•a default in payment of principal or interest; or

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•a default under any provision of the subordinated indenture that itself cannot be modified or amended without the consent of the holders of all outstanding junior subordinated notes.

The holders of a majority in principal amount of the junior subordinated notes have the right to direct the time, method and place of conducting any proceeding for any remedy available to the trustee, subject to the provisions of the subordinated indenture.

The trustee shall have no right or obligation under the subordinated indenture or otherwise to exercise any remedies on behalf of any holders of the junior subordinated notes pursuant to the subordinated indenture in connection with any “default”, unless such remedies are available under the subordinated indenture and the trustee is directed to exercise such remedies by the holders of a majority in principal amount of the junior subordinated notes pursuant to and subject to the conditions of the subordinated indenture. In connection with any such exercise of remedies the trustee shall be entitled to the same immunities and protections and remedial rights (other than acceleration) as if such “default” were an “event of default”.

Actions Not Restricted by the Subordinated Indenture

The subordinated indenture does not contain restrictions on our ability to:

•incur, assume or become liable for any type of debt or other obligation;

•create liens on our property for any purpose; or

•pay dividends or make distributions on our capital stock or purchase or redeem our capital stock, except as set forth under “—Dividend and Other Payment Stoppages During Deferral Periods and Under Certain Other Circumstances” above, or make debt payments on, or purchase, redeem or retire, any senior debt.

The subordinated indenture does not require the maintenance of any financial ratios or specified levels of net worth or liquidity. In addition, the subordinated indenture does not contain any provisions that would require Unum Group to repurchase or redeem or modify the terms of any of the junior subordinated notes upon a change of control or other event involving Unum Group that may adversely affect the creditworthiness of the junior subordinated notes.

Denominations, Transfer and Exchange

The junior subordinated notes are held in the form of one or more global securities registered in the name of Cede & Co., as nominee of DTC, as described below under “— Book-Entry Delivery and Settlement”. The junior subordinated notes were issued only in denominations of $25 and integral multiples of $25 in excess thereof.

Defeasance

The junior subordinated notes are subject to the defeasance and covenant defeasance provisions of the subordinated indenture.

Merger, Consolidation or Sale

We may consolidate with, or sell, lease or otherwise transfer all or substantially all of our assets to, or merge with or into, any other corporation or trust or entity, provided that:

•we are the survivor in the merger, or the survivor, if not us, expressly assumes by supplemental indenture the due and punctual payment of the principal of, and any premium, interest or additional amounts on, all of the outstanding junior subordinated notes and the due and punctual performance and observance of all of the covenants and conditions contained in the subordinated indenture;

•immediately after giving effect to the transaction and treating any indebtedness that becomes an obligation of ours or one of our subsidiaries as a result of the transaction, as having been incurred by us or the subsidiary at the time of the transaction, there is no event of default under the indenture applicable to the junior subordinated notes, and no event which, after notice or the lapse of time, or both, would become an event of default; and

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•certain other conditions that are described in the subordinated indenture.

Upon any such consolidation, merger, or sale, the successor corporation formed, or into which we are merged or to which we are sold, shall succeed to, and be substituted for, us under the subordinated indenture.

This covenant would not apply to any recapitalization transaction, change of control of us or a transaction in which we incur a large amount of additional debt unless the transactions or change of control included a merger or consolidation or transfer of all or substantially all of our assets. There are no covenants or other provisions in the subordinated indenture providing for a put or increased interest or that would otherwise afford holders of the junior subordinated notes additional protection in the event of a recapitalization transaction, a change of control of us or a transaction in which we incur or acquire a large amount of additional debt.

Also, if we merge, consolidate or sell our assets substantially as an entirety and the successor is a non-U.S. entity, neither we nor any successor would have any obligation to compensate you for any resulting adverse tax consequences relating to the junior subordinated notes.

Modification of the Subordinated Indenture

Modification and amendment of the subordinated indenture may be made only with the consent of the holders of not less than a majority in principal amount of all outstanding debt securities issued under the indenture which are affected by the modification or amendment, voting together as one class. However, no modification or amendment may, without the consent of the holder of each debt security affected, including the junior subordinated notes, do any of the following:

•change the stated maturity of the principal of, or any premium, make-whole amount, installment of principal of, interest or additional amounts payable on, any debt security;

•reduce the principal amount of, or the rate or amount of interest on, any premium, make-whole amount payable on redemption of or any additional amounts payable with respect to, any debt security;

•reduce the amount of principal of an original issue discount security, indexed security or any make-whole amount that would be due and payable upon declaration of acceleration of the maturity of an original issue discount security or indexed security, or would be provable in bankruptcy, or adversely affect any right of repayment of the holder of any debt security;

•change the place of payment or the currency or currencies of payment of the principal of, and any premium, make-whole amount, interest or additional amounts on, any debt security;

•impair the right to institute suit for the enforcement of any payment on or with respect to any debt security;

•reduce the percentage of the holders of outstanding debt securities of any series necessary to modify or amend the applicable indenture, to waive compliance with certain provisions thereof or certain defaults and consequences thereunder, or to reduce the quorum or voting requirements contained in the applicable indenture;

•make any change that adversely affects the right to convert or exchange any security or decrease the conversion or exchange rate or increase the conversion or exchange price of any security; or

•modify any of the foregoing provisions or any of the provisions relating to the waiver of certain past defaults or certain covenants, except to increase the required percentage to effect such action or to provide that certain other provisions may not be modified or waived without the consent of the holder of the debt security.

We and the trustee may modify or amend the subordinated indenture, without the consent of any holder of debt securities, for any of the following purposes:

•to evidence the succession of another person to us as obligor under the subordinated indenture;

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•to add to the covenants for the benefit of the holders of all or any series of debt securities, including the junior subordinated notes, or to surrender any right or power conferred upon us in the indenture;

•to add events of default for the benefit of the holders of all or any series of debt securities, including the junior subordinated notes;

•to secure the debt securities, including the junior subordinated notes;

•to provide for the acceptance or appointment of a successor trustee or facilitate the administration of the trusts under an indenture by more than one trustee;

•to cure any ambiguity, defect or inconsistency in the subordinated indenture;

•to close the subordinated indenture with respect to the authentication and delivery of additional series of debt securities or to qualify, or maintain qualification of, an indenture under the Trust Indenture Act;

•to supplement any of the provisions of the subordinated indenture to the extent necessary to permit or facilitate defeasance and discharge of any series of the debt securities, including the junior subordinated notes; or

•to make any provisions with respect to the conversion or exchange rights of the holders of any debt securities, including providing for the conversion or exchange of any debt securities, including the junior subordinated notes, into any of our securities or property;

provided that, in each case above, the action does not adversely affect the interests of the holders of the debt securities of any series, including the junior subordinated notes, issued under the subordinated indenture in any material respect.

Book-Entry Delivery and Settlement

Global Notes

We issued the junior subordinated notes in the form of one or more global notes in definitive, fully registered, book-entry form. The global notes were deposited with or on behalf of DTC and registered in the name of Cede & Co., as nominee of DTC.

DTC, Clearstream and Euroclear

Beneficial interests in the global notes are represented through book-entry accounts of financial institutions acting on behalf of beneficial owners as direct and indirect participants in DTC. Investors may hold interests in the global notes through either DTC (in the United States), Clearstream Banking, société anonyme, Luxembourg, which we refer to as Clearstream, or Euroclear Bank S.A./N.V., as operator of the Euroclear System, which we refer to as Euroclear, in Europe, either directly if they are participants in such systems or indirectly through organizations that are participants in such systems. Clearstream and Euroclear will hold interests on behalf of their participants through customers’ securities accounts in Clearstream’s and Euroclear’s names on the books of their U.S. depositaries, which in turn will hold such interests in customers’ securities accounts in the U.S. depositaries’ names on the books of DTC.

DTC has advised us as follows:

•DTC is a limited-purpose trust company organized under the New York Banking Law, a “banking organization” within the meaning of the New York Banking Law, a member of the Federal Reserve System, a “clearing corporation” within the meaning of the New York Uniform Commercial Code and a “clearing agency” registered under Section 17A of the Securities Exchange Act of 1934.

•DTC holds securities that its participants deposit with DTC and facilitates the settlement among participants of securities transactions, such as transfers and pledges, in deposited securities through electronic computerized book-entry changes in participants’ accounts, thereby eliminating the need for physical movement of securities certificates.

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•Direct participants include securities brokers and dealers, banks, trust companies, clearing corporations and other organizations.

•DTC is owned by a number of its direct participants and by the New York Stock Exchange, Inc., the American Stock Exchange LLC and the Financial Industry Regulatory Authority, Inc.

•Access to the DTC system is also available to others such as securities brokers and dealers, banks and trust companies that clear through or maintain a custodial relationship with a direct participant, either directly or indirectly.

•The rules applicable to DTC and its direct and indirect participants are on file with the SEC.

Clearstream has advised us that it is incorporated under the laws of Luxembourg as a professional depositary. Clearstream holds securities for its customers and facilitates the clearance and settlement of securities transactions between its customers through electronic book-entry changes in accounts of its customers, thereby eliminating the need for physical movement of certificates. Clearstream provides to its customers, among other things, services for safekeeping, administration, clearance and settlement of internationally traded securities and securities lending and borrowing. Clearstream interfaces with domestic markets in several countries. As a professional depositary, Clearstream is subject to regulation by the Luxembourg Commission for the Supervision of the Financial Section. Clearstream customers are recognized financial institutions around the world, including

underwriters, securities brokers and dealers, banks, trust companies, clearing corporations and other organizations and may include the underwriters. Indirect access to Clearstream is also available to others, such as banks, brokers, dealers and trust companies that clear through or maintain a custodial relationship with a Clearstream customer either directly or indirectly.

Euroclear has advised us that it was created in 1968 to hold securities for participants of Euroclear and to clear and settle transactions between Euroclear participants through simultaneous electronic book-entry delivery against payment, thereby eliminating the need for physical movement of certificates and any risk from lack of simultaneous transfers of securities and cash. Euroclear provides various other services, including securities lending and borrowing and interfaces with domestic markets in several countries. Euroclear is operated by Euroclear Bank S.A./N.V., which we refer to as the Euroclear Operator, under contract with Euroclear Clearance Systems S.C., a Belgian cooperative corporation, which we refer to as the Cooperative. All operations are conducted by the Euroclear Operator, and all Euroclear securities clearance accounts and Euroclear cash accounts are accounts with the Euroclear Operator, not the Cooperative. The Cooperative establishes policy for Euroclear on behalf of Euroclear participants. Euroclear participants include banks (including central banks), securities brokers and dealers, and other professional financial intermediaries and may include the underwriters. Indirect access to Euroclear is also available to other firms that clear through or maintain a custodial relationship with a Euroclear participant, either directly or indirectly.

The Euroclear Operator has advised us that it is licensed by the Belgian Banking and Finance Commission to carry out banking activities on a global basis. As a Belgian bank, it is regulated and examined by the Belgian Banking and Finance Commission.

We have provided the descriptions of the operations and procedures of DTC, Clearstream and Euroclear solely as a matter of convenience. These operations and procedures are solely within the control of those organizations and are subject to change by them from time to time. None of us, the underwriters nor the trustee takes any responsibility for these operations or procedures, and you are urged to contact DTC, Clearstream and Euroclear or their participants directly to discuss these matters.

We expect that under procedures established by DTC:

•upon deposit of the global notes with DTC or its custodian, DTC will credit on its internal system the accounts of direct participants designated by the underwriters with portions of the principal amounts of the global notes; and

•ownership of the junior subordinated notes will be shown on, and the transfer of ownership thereof will be effected only through, records maintained by DTC or its nominee, with respect to interests of direct participants, and the records of direct and indirect participants, with respect to interests of persons other than participants.

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The laws of some jurisdictions may require that purchasers of securities take physical delivery of those securities in definitive form. Accordingly, the ability to transfer interests in the junior subordinated notes represented by a global note to those persons may be limited. In addition, because DTC can act only on behalf of its participants, who in turn act on behalf of persons who hold interests through participants, the ability of a person having an interest in the junior subordinated notes represented by a global note to pledge or transfer those interests to persons or entities that do not participate in DTC’s system, or otherwise to take actions in respect of such interest, may be affected by the lack of a physical definitive security in respect of such interest.

So long as DTC or its nominee is the registered owner of a global note, DTC or that nominee will be considered the sole owner or holder of the junior subordinated notes represented by that global note for all purposes under the subordinated indenture and under the junior subordinated notes. Except as provided below, owners of beneficial interests in a global note will not be entitled to have the junior subordinated notes represented by that global note registered in their names, will not receive or be entitled to receive physical delivery of certificated notes and will not be considered the owners or holders thereof under the subordinated indenture or under the junior subordinated notes for any purpose, including with respect to the giving of any direction, instruction or approval to the trustee. Accordingly, each holder owning a beneficial interest in a global note must rely on the procedures of DTC and, if that holder is not a direct or indirect participant, on the procedures of the participant through which that holder owns its interest, to exercise any rights of a holder of junior subordinated notes under the subordinated indenture or a global note.

Neither we nor the trustee will have any responsibility or liability for any aspect of the records relating to or payments made on account of junior subordinated notes by DTC, Clearstream or Euroclear, or for maintaining, supervising or reviewing any records of those organizations relating to the junior subordinated notes.

Payments on the junior subordinated notes represented by the global notes will be made to DTC or its nominee, as the case may be, as the registered owner thereof. We expect that DTC or its nominee, upon receipt of any payment on the junior subordinated notes represented by a global note, will credit participants’ accounts with payments in amounts proportionate to their respective beneficial interests in the global note as shown in the records of DTC or its nominee. We also expect that payments by participants to owners of beneficial interests in the global note held through such participants will be governed by standing instructions and customary practice as is now the case with securities held for the accounts of customers registered in the names of nominees for such customers. The participants will be responsible for those payments.

Distributions on the junior subordinated notes held beneficially through Clearstream will be credited to cash accounts of its customers in accordance with its rules and procedures, to the extent received by the U.S. depositary for Clearstream.

Securities clearance accounts and cash accounts with the Euroclear Operator are governed by the Terms and Conditions Governing Use of Euroclear and the related Operating Procedures of the Euroclear System, and applicable Belgian law (collectively, the “Terms and Conditions”). The Terms and Conditions govern transfers of securities and cash within Euroclear, withdrawals of securities and cash from Euroclear, and receipts of payments with respect to securities in Euroclear. All securities in Euroclear are held on a fungible basis without attribution of specific certificates to specific securities clearance accounts. The Euroclear Operator acts under the Terms and Conditions only on behalf of Euroclear participants and has no record of or relationship with persons holding through Euroclear participants.

Distributions on the junior subordinated notes held beneficially through Euroclear will be credited to the cash accounts of its participants in accordance with the Terms and Conditions, to the extent received by the U.S. depositary for Euroclear.

Clearance and Settlement Procedures

Initial settlement for the junior subordinated notes was made in immediately available funds. Secondary market trading between DTC participants will occur in the ordinary way in accordance with DTC rules and will be settled in immediately available funds. Secondary market trading between Clearstream customers and/or Euroclear participants will occur in the ordinary way in accordance with the applicable rules and operating procedures of Clearstream and Euroclear, as applicable, and will be settled using the procedures applicable to conventional eurobonds in immediately available funds.

Cross-market transfers between persons holding directly or indirectly through DTC, on the one hand, and directly or indirectly through Clearstream customers or Euroclear participants, on the other, will be effected through DTC in accordance

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with DTC rules on behalf of the relevant European international clearing system by the U.S. depositary; however, such cross-market transactions will require delivery of instructions to the relevant

European international clearing system by the counterparty in such system in accordance with its rules and procedures and within its established deadlines (European time). The relevant European international clearing system will, if the transaction meets its settlement requirements, deliver instructions to the U.S. depositary to take action to effect final settlement on its behalf by delivering or receiving the junior subordinated notes in DTC, and making or receiving payment in accordance with normal procedures for same-day funds settlement applicable to DTC. Clearstream customers and Euroclear participants may not deliver instructions directly to their U.S. depositaries.

Because of time-zone differences, credits of the junior subordinated notes received in Clearstream or Euroclear as a result of a transaction with a DTC participant will be made during subsequent securities settlement processing and dated the business day following the DTC settlement date. Such credits or any transactions in the junior subordinated notes settled during such processing will be reported to the relevant Clearstream customers or Euroclear participants on such business day. Cash received in Clearstream or Euroclear as a result of sales of the junior subordinated notes by or through a Clearstream customer or a Euroclear participant to a DTC participant will be received with value on the DTC settlement date but will be available in the relevant Clearstream or Euroclear cash account only as of the business day following settlement in DTC.

Although DTC, Clearstream and Euroclear have agreed to the foregoing procedures to facilitate transfers of the junior subordinated notes among participants of DTC, Clearstream and Euroclear, they are under no obligation to perform or continue to perform such procedures and such procedures may be changed or discontinued at any time.

Certificated Notes

We will issue certificated notes to each person that DTC identifies as the beneficial owner of the junior subordinated notes represented by a global note upon surrender by DTC of the global note if:

•DTC notifies us that it is no longer willing or able to act as a depositary for such global note or ceases to be a clearing agency registered under the Securities Exchange Act of 1934, and we have not appointed a successor depositary within 90 days of that notice or becoming aware that DTC is no longer so registered;

•an event of default has occurred and is continuing, and DTC requests the issuance of certificated notes; or

•we determine (subject to the procedures of DTC) not to have the junior subordinated notes represented by a global note.

Neither we nor the trustee will be liable for any delay by DTC, its nominee or any direct or indirect participant in identifying the beneficial owners of the junior subordinated notes. We and the trustee may conclusively rely on, and will be protected in relying on, instructions from DTC or its nominee for all purposes, including with respect to the registration and delivery, and the respective principal amounts, of the certificated notes to be issued.

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EX-10.31

Exhibit 10.31

ANNUAL INCENTIVE PLAN

(as amended and restated effective as of January 1, 2023)

ARTICLE 1

Background and Purpose

1.1.Background. Unum Group previously adopted this Annual Incentive Plan, an annual incentive bonus plan for its officers and employees, effective as of January 1, 2022 (the “Prior Plan”). Effective as of January 1, 2023, the Prior Plan is hereby amended and restated as set forth in this document.

1.2.Purpose. The purpose of the Plan is to motivate the Participants to perform in a way that will enable the Company to reach or exceed its goals.

ARTICLE 2

Definitions

2.1.Definitions. Certain terms of the Plan have defined meanings set forth in this Article 2 and which shall govern unless the context in which they are used clearly indicates that some other meaning is intended.

Act. The Securities Exchange Act of 1934, as amended from time to time.

Beneficiary. Any person or persons designated by a Participant, in accordance with procedures established under Article 7.1 of the Plan, to receive benefits hereunder in the event of the Participant’s death.

Board. The Board of Directors of the Company.

Cause. The term “Cause” with respect to a Participant shall have the meaning assigned such term in any separate employment, change of control or severance agreement between the Participant and the Company or any Subsidiary as then in effect. In the absence of such other agreement or definition, the term “Cause” as used herein and for the purposes of this Plan shall mean the occurrence of one or more of the following with respect to a Participant:

(1)The continued failure of the Participant to perform substantially his or her duties with the Company or one of its affiliates (other than any such failure resulting from incapacity due to physical or mental illness), after a written demand for substantial performance is delivered to the Participant by the Board, in the event the Participant is the CEO, or by the CEO or other appropriate manager of the Participant, in the event the Participant is not the CEO, which in each case specifically identifies the manner in which the Board, CEO or other appropriate manager, as the case may be, believes that the Participant has not substantially performed the Participant’s duties, or

(2)The willful engaging by the Participant in illegal conduct or gross misconduct, which is materially and demonstrably injurious to the Company, or

(3)Conviction of a felony or a guilty or nolo contendere plea by the Participant with respect thereto.

For purposes of this Cause definition, no act or failure to act, on the part of a Participant, shall be considered “willful” unless it is done, or omitted to be done, by the Participant in bad faith or without reasonable belief that the Participant’s action or omission was in the best interests of the Company. Any act, or failure to act, based upon authority given pursuant to a resolution duly adopted by the Board or (with respect to Participants other than the CEO) upon the instructions of the CEO, or based upon the advice of counsel for the Company, shall be conclusively presumed to be done, or omitted to be done, by the Participant in good faith and in the best interests of the Company. The cessation of employment of a Participant who is an executive officer of the Company shall not be deemed to be for Cause unless and until there shall have been delivered to the Participant a copy of a resolution duly adopted by the affirmative vote of not less than two-thirds of the entire membership of the Board at a meeting of the Board called and held for such purpose (after reasonable notice is provided to the Participant and the Participant is given an opportunity, together with counsel, to be heard before the Board) finding that, in the good faith opinion of the Board, the Participant has engaged in the conduct described in subparagraph (1) or (2) above, and specifying the particulars thereof in detail.

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CEO. The chief executive officer of the Company.

Change in Control. The occurrence of one or more of the following events:

(1)During any period of two consecutive years, individuals who, at the beginning of such period, constitute the Board (the “Incumbent Directors”) cease for any reason to constitute at least a majority of the Board; provided that any person becoming a director and whose election or nomination for election was approved by a vote of at least two-thirds of the Incumbent Directors then on the Board (either by a specific vote or by approval of the proxy statement of the Company in which such person is named as a nominee for director, without written objection to such nomination) shall be an Incumbent Director; provided, however, that no individual initially elected or nominated as a director of the Company as a result of an actual or threatened election contest (as described in Rule 14a-11 under the Act) (“Election Contest”) or other actual or threatened solicitation of proxies or consents by or on behalf of any “person” (as such term is defined in Section 3(a)(9) of the Act and as used in Sections 13(d)(3) and 14(d)(2) of the Act) other than the Board (“Proxy Contest”), including by reason of any agreement intended to avoid or settle any Election Contest or Proxy Contest, shall be deemed an Incumbent Director;

(2)Any person is or becomes a “beneficial owner” (as defined in Rule 13d-3 under the Act), directly or indirectly, of securities of the Company representing 20% (30% with respect to deferred compensation subject to Section 409A of the Code) or more of the combined voting power of the Company’s then outstanding securities eligible to vote for the election of the Board (the “Company Voting Securities”); provided, however, that the event described in this paragraph (2) shall not be deemed to be a Change in Control of the Company by virtue of any of the following acquisitions: (A) by the Company or any Subsidiary, (B) by any employee benefit plan (or related trust) sponsored or maintained by the Company or any Subsidiary, (C) by an underwriter temporarily holding securities pursuant to an offering of such securities, (D) pursuant to a Non-Qualifying Transaction (as defined in paragraph (3)), or (E) a transaction (other than one described in paragraph (3) below) in which Company Voting Securities are acquired from the Company, if a majority of the Incumbent Directors approves a resolution providing expressly that the acquisition pursuant to this clause (E) does not constitute a Change in Control of the Company under this paragraph (2);

(3)The consummation of a merger, consolidation, statutory share exchange or similar form of corporate transaction involving the Company or any of its Subsidiaries that requires the approval of the Company’s stockholders, whether for such transaction or the issuance of securities in the transaction (a “Reorganization”), or sale or other disposition of all or substantially all of the Company’s assets to an entity that is not an affiliate of the Company (a “Sale”), unless immediately following such Reorganization or Sale: (A) more than 50% of the total voting power of (x) the corporation resulting from such Reorganization or the corporation which has acquired all or substantially all of the assets of the Company (in either case, the “Surviving Corporation”), or (y) if applicable, the ultimate parent corporation that directly or indirectly has beneficial ownership of 100% of the voting securities eligible to elect directors of the Surviving Corporation (the “Parent Corporation”), is represented by the Company Voting Securities that were outstanding immediately prior to such Reorganization or Sale (or, if applicable, is represented by shares into which such Company Voting Securities were converted pursuant to such Reorganization or Sale), and such voting power among the holders thereof is in substantially the same proportion as the voting power of such Company Voting Securities among the holders thereof immediately prior to the Reorganization or Sale, (B) no person (other than any employee benefit plan (or related trust) sponsored or maintained by the Surviving Corporation or the Parent Corporation) is or becomes the beneficial owner, directly or indirectly, of 20% (30% with respect to deferred compensation subject to Section 409A of the Code) or more of the total voting power of the outstanding voting securities eligible to elect directors of the Parent Corporation (or, if there is no Parent Corporation, the Surviving Corporation), and (C) at least a majority of the members of the board of directors of the Parent Corporation (or, if there is no Parent Corporation, the Surviving Corporation) following the consummation of the Reorganization or Sale were Incumbent Directors at the time of the Board’s approval of the execution of the initial agreement providing for such Reorganization or Sale (any Reorganization or Sale which satisfies all of the criteria specified in (A), (B) and (C) above shall be deemed to be a “Non-Qualifying Transaction”); or

(4)The stockholders of the Company approve a plan of complete liquidation or dissolution of the Company.

Notwithstanding the foregoing, a Change in Control shall not be deemed to occur solely because any person acquires beneficial ownership of more than 20% (30% with respect to deferred compensation subject to Section 409A of the Code) of the Company Voting Securities as a result of the acquisition of Company Voting Securities by the Company which reduces the number of Company Voting Securities outstanding; provided, that if after such acquisition by the Company such person becomes

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the beneficial owner of additional Company Voting Securities that increases the percentage of outstanding Company Voting Securities beneficially owned by such person, a Change in Control of the Company shall then occur.

Code. The Internal Revenue Code of 1986, as amended from time to time.

Committee. The Human Capital Committee of the Board or, to the extent that the Human Capital Committee shall have delegated authority to the CEO or the Chair of the Committee as permitted in Article 3, the term “Committee” shall mean the CEO or such Chair, as the case may be.

Company. Unum Group, a Delaware corporation, and its corporate successors.

Disability. Disability of a Participant means the Participant is (1) unable to engage in any substantial gainful activity by reason of any medically determinable physical or mental impairment that can be expected to result in death or that can be expected to last for a continuous period of not less than 12 months, or (2) by reason of any medically determinable physical or mental impairment that can be expected to result in death or can be expected to last for a continuous period of not less than 12 months, receiving income replacement benefits for a period of not less than three months under an accident and health plan covering employees of the Company. The Committee may require such medical or other evidence as it deems necessary to judge the nature and permanency of the Participant’s condition.

Executive Compensation. The Executive Compensation division of the Human Resources Department of the Company.

Incentive Award. A cash award granted pursuant to Article 5 of the Plan.

Job Requalification. A termination of employment due to the fact that it may be necessary for the Company to require the applicable Participant to attain greater skill levels to retain his or her position and, for business reasons, the Company determines there is not sufficient time or the Participant does not have sufficient ability for the Participant to develop these skills. A Job Requalification can also occur when a position changes or evolves such that the Participant is no longer qualified to perform the job functions of such position (as determined by the Company).

Participant. An employee of the Company or its Subsidiaries participating in the Plan.

Plan. This Annual Incentive Plan, dated effective as of January 1, 2022, together with any subsequent amendments and/or restatements hereto.

Plan Year. January 1 to December 31 of the applicable year.

Retirement. Retirement shall mean a voluntary termination of employment by (1) a U.S. Participant after having attained age 60 and at least 15 years of continuous service with the Company or a Subsidiary, or (2) a non-U.S. Participant after at least 15 years of continuous service with the Company or a Subsidiary where such Participant has the intention of ceasing to do any further work.

Subsidiary. Any corporation, limited liability company, partnership or other entity of which a majority of the outstanding voting stock or voting power is beneficially owned directly or indirectly by the Company.

ARTICLE 3

Administration of the Plan

3.1.General. The Plan shall be administered by the Committee.

3.2.Actions and Interpretations by the Committee. For purposes of administering the Plan, the Committee may from time to time adopt rules, regulations, guidelines and procedures for carrying out the provisions and purposes of the Plan and make such other determinations, not inconsistent with the Plan, as the Committee may deem appropriate. The Committee’s interpretation of the Plan, any awards granted under the Plan, and all decisions and determinations by the Committee with respect to the Plan are and shall be final, binding, and conclusive on all parties. Each member of the Committee is entitled to, in good faith, rely or act upon any report or other information furnished to that member by any officer or other employee of the Company, the Company’s independent certified public accountants, Company counsel or any executive compensation consultant or other professional retained by the Company or the Committee to assist in the administration of the Plan. No member of the

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Committee, the Board of Directors, or any delegate as the case may be, shall be liable for any act under the Plan done in good faith.

3.3.Authority of the Committee. Except as provided below in this Section 3.3, the Committee has the exclusive power, authority and discretion to:

(a)designate Participants;

(b)establish the goals and target awards under the Plan for each Plan Year and determine whether or to what extent performance goals were achieved in a given Plan Year;

(c)determine the amount of actual awards under the Plan and the methodology for determination and the aggregate amount of awards, subject to the terms of the Plan;

(d)adjust or eliminate any Incentive Award payable under the Plan, regardless of the achievement of performance goals;

(e)decide all other matters that must be determined in connection with an Incentive Award;

(f)establish, adopt or revise any rules, regulations, guidelines or procedures as it may deem necessary or advisable to administer the Plan;

(g)make all other decisions and determinations that, and take or approve such further actions as, may be required under the Plan or as the Committee deems necessary or advisable to administer the Plan, including, without limitation, correcting a defect, supplying any omission, adjusting or interpreting any performance criteria or condition, or reconciling any inconsistency so that the Plan or any Incentive Award complies with applicable law, regulations and listing requirements and so as to avoid unanticipated consequences or address unanticipated events deemed by the Committee to be inconsistent with the purposes of the Plan;

(h)amend, modify or terminate the Plan as provided herein; and

(i)adopt such modifications, procedures, and subplans as may be necessary or desirable (1) to effectuate the compensation incentive objectives of the Company or (2) to comply with provisions of the laws of non-U.S. jurisdictions in which the Company or any affiliate may operate, in order to assure the viability of the benefits of awards granted to Participants located in such other jurisdictions and to meet the objectives of the Plan.

Nothing contained in the Plan shall prevent or be deemed to prevent the Committee or the Company, any Subsidiary or any of their respective affiliates from adopting other or additional compensation arrangements for, or paying or providing any other or additional amounts or benefits to, its employees.

To the extent permitted under Delaware law, the Committee may expressly delegate to the CEO or the Chair of the Committee (the “Chair”) some or all of the Committee’s authority under subsections (a) through (d) above with respect to Participants who are not executive officers, pursuant to guidelines approved by the Committee. To the extent of such delegated authority, references herein to “Committee” shall refer to the CEO or the Chair, as the case may be. In addition, the Committee, may, in its discretion, delegate its general administrative duties under the Plan to an officer or employee or committee composed of officers or employees of the Company, but may not delegate its authority to construe and interpret the Plan. The acts of the CEO, the Chair and any other persons acting under such delegated authority shall be treated hereunder as acts of the Committee and the delegates shall report to the Committee regarding the delegated duties and responsibilities.

ARTICLE 4

Eligibility and Participation; Change in Control

4.1.General. Participation in the Plan is limited to such officers or employees, or categories of employees, of the Company as may be designated by the Committee from time to time. Participation in one Plan Year does not guarantee participation in any subsequent Plan Year.

4.2.New Hires. If a person is hired on or before September 30 of a Plan Year and is selected for participation in the Plan for such Plan Year, then, unless the Committee provides otherwise, he or she will become a Participant in the Plan as of

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the date of hire and (without limiting the other provisions of this Article 4) payment, if any, in respect of the Incentive Award will be prorated in an amount equal to the product of (i) the amount earned in respect of the Incentive Award according to the terms and conditions of this Plan, and (ii) a fraction, the numerator of which is the number of days in the Plan Year on and after the date of hire and the denominator of which is the number of days in such Plan Year. If an employee’s date of hire occurs after September 30, such employee shall not be eligible to become a Participant for the Plan Year in which the employee’s date of hire occurs.

4.3.Promotions. Subject to the penultimate sentence of this Section 4.3 and without limiting the other provisions of this Article 4, if a Participant is promoted during a Plan Year from one job level to a higher job level, such Participant will be eligible to receive payment in respect of his or her Incentive Award for the Plan Year in which the promotion occurs in an amount equal to the sum of (i) the product of (A) the amount earned in respect of the Incentive Award according to the terms and conditions of this Plan (based on the Participant’s job level immediately before the promotion) and (B) a fraction, the numerator of which is the number of fully completed pay cycles in the Plan Year before the date of promotion during which the employee is a Participant in this Plan and the denominator of which is the number of pay cycles in such Plan Year, and (ii) the product of (C) the amount earned in respect of the Incentive Award according to the terms and conditions of this Plan (based on the Participant’s job level immediately after the promotion) and (D) a fraction, the numerator of which is the number of partial or completed pay cycles in the Plan Year on and after the date of promotion and the denominator of which is the number of pay cycles in such Plan Year; provided, that if a Participant is promoted multiple times during a Plan Year, the calculation of his or her Incentive Award for the Plan Year will account for all job levels held during the Plan Year based on the number of pay cycles in the Plan Year during which each job level was held. If a person is promoted during a Plan Year and is selected by the Committee to participate in the Plan as a result of such promotion, then, unless the Committee provides otherwise, he or she will become a Participant in the Plan as of the date of the promotion and payment, if any, in respect of the Incentive Award will (without limiting the other provisions of this Article 4) equal the product of (1) the amount earned in respect of the Incentive Award according to the terms and conditions of this Plan (based on the Participant’s job level immediately after the date of promotion), and (2) a fraction, the numerator of which is the number of partial or completed pay cycles in the Plan Year on and after the date of promotion and the denominator of which is the number of pay cycles in such Plan Year.

4.4.Demotions. If a Participant is demoted during the Plan Year, the Committee may, at any time before payment in respect of Incentive Awards granted for the Plan Year in which such demotion occurs generally is made to other Participants and without limiting the other provisions of this Article 4, determine whether and the extent to which the Participant’s eligibility to receive payment in respect of his or her Incentive Award terminates or survives. The Committee may (without limitation) determine that the payment, if any, in respect of the demoted Participant’s Incentive Award will (without limiting the other provisions of this Article 4) equal the product of (1) the amount earned in respect of the Incentive Award according to the terms and conditions of this Plan (based on the Participant’s job level immediately before the date of demotion), and (2) a fraction, the numerator of which is the number of fully completed pay cycles in the Plan Year before the date of demotion during which the employee is a Participant in this Plan and the denominator of which is the number of pay cycles in such Plan Year.

4.5.Death, Disability, Retirement, Position Elimination and Job Requalification. Subject to Section 4.7 below:

(a)In the event of death, Disability or Retirement of a Participant during the applicable Plan Year on or after the last payday of June during such Plan Year, the Participant or the Participant’s Beneficiary, as applicable, will receive a prorated payment in respect of the Participant’s Incentive Award (subject to the terms and conditions of Section 4.5(c)).

(b)In the event a Participant incurs a termination of employment by reason of the elimination of his or her position or a Job Requalification in each case during the applicable Plan Year on or after the last payday of June during such Plan Year, the Participant will receive a prorated payment in respect of the Participant’s Incentive Award (subject to the terms and conditions of Section 4.5(c)).

(c)For purposes of Sections 4.5(a) and (b), and without limiting the other provisions of this Article 4, the prorated payment, if any, received in respect of an Incentive Award equals the product of (1) the amount earned in respect of the Incentive Award according to the terms and conditions of this Plan, and (2) a fraction, the numerator of which is the number of partial or completed pay cycles in the Plan Year preceding the date of death, Disability, Retirement or termination of employment by reason of the elimination of a Participant’s position or a Job Requalification and the denominator of which is the number of pay cycles in such Plan Year. In each case, the Participant will be entitled to all or a portion of the prorated payment, if any, calculated according to the immediately preceding sentence only after taking into account manager recommendations as to the applicable Participant’s individual performance. Such prorated payments will in all cases be calculated and paid after the end of the Plan Year

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at the time that Participants generally receive payments of Incentive Awards under this Plan. Amounts paid on behalf of a deceased Participant will be paid to the Participant’s Beneficiary. For the avoidance of doubt, (i) in the event of a Participant’s termination of employment by reason of Disability or Retirement, or in the event of a Participant’s death, in each case before the last payday of June of a Plan Year, or (ii) in the event of a Participant’s termination of employment by reason of the elimination of his or her position or a Job Requalification in each case before the last payday of June of a Plan Year, the Participant will forfeit any right to an Incentive Award for that Plan Year.

4.6.Other Terminations of Employment. Except as provided in Section 4.7, in the event of a Participant’s termination of employment during a Plan Year (or after the end of a Plan Year and before the time the Committee has approved the final level of payment in respect of Incentive Awards granted for such Plan Year and the Participant’s final and specific payment then becomes determinable) other than by reason of death, Disability, Retirement, the elimination of his or her position or a Job Requalification, the Participant will forfeit any right to an Incentive Award for that Plan Year. For terminations other than for Cause that occur after the time of such approval by the Committee in respect of Incentive Awards granted for a Plan Year, but before payment is made in respect of such Incentive Awards, payment will be made during the calendar year that the Committee approved the final level of payment in respect of the Incentive Awards as though the termination of employment had not occurred. For the avoidance of doubt, if a Participant’s employment is terminated for Cause at any time prior to the time of payment in respect of Incentive Awards for any Plan Year (even if, at such time, the Committee has already approved the final level of payment in respect of such Incentive Awards), the Participant will forfeit any right to such Incentive Awards. Solely for purposes of the Plan, the employment relationship shall be treated as continuing while the Participant is on military leave, sick leave, or other bona fide leave of absence if the period of such leave does not exceed six months, or if longer, so long as the individual retains a right to reemployment, or is otherwise protected, with the service recipient under an applicable statute or by contract. A termination of employment shall not occur in a circumstance in which a Participant transfers employment from the Company to one of its Subsidiaries, transfers employment from a Subsidiary to the Company, or transfers employment from one Subsidiary to another Subsidiary.

4.7.Change in Control. In the event of a Change in Control, the Committee shall determine the level of payment, if any, in respect of outstanding Incentive Awards that would have been attained if the Plan Year had ended as of the end of the month immediately preceding the month in which the Change in Control occurs based on actual performance through the end of the month immediately preceding the month in which the Change in Control occurs (the “CIC Vested Awards”). Thereafter:

(a)Each Participant who is actively employed (within the meaning of this Article 4) at the end of the Plan Year in which the Change in Control occurs shall be entitled to payment in respect of his or her Incentive Award in an amount equal to the greater of his or her CIC Vested Award and the amount, if any, earned in respect of the Incentive Award based on actual performance for the entire Plan Year.

(b)If, during a Plan Year in which a Change in Control occurs, the Plan is terminated upon or after such Change in Control, each Participant who is actively employed (within the meaning of this Article 4) at the time of such Plan termination shall be entitled to payment in respect of his or her Incentive Award in an amount equal to the greater of his or her CIC Vested Award and the amount, if any, earned in respect of the Incentive Award based on actual performance through the date of termination of the Plan.

(c)If, during a Plan Year in which a Change in Control occurs, a Participant’s employment is terminated by the Company without Cause upon or after such Change in Control, such Participant shall be entitled to payment in respect of his or her Incentive Award in an amount equal to the greater of his or her CIC Vested Award and the amount, if any, earned in respect of the Incentive Award based on actual performance through the date of termination of employment.

ARTICLE 5

Incentive Awards

5.1.Eligibility. The Committee may designate any officer or employee, or any category of employees, of the Company or its Subsidiaries as a Participant or Participants, as applicable, in the Plan for any Plan Year. An employee, of any title, who is an hourly employee not having a standard working week of twenty (20) or more hours, as documented in the Company’s or a Subsidiary’s human resource records, and who is not eligible for benefits, including, without limitation, Unum

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scholars, interns, on-call enrollers, and employees in any other position or title that may be added in the future with the foregoing characteristics, shall not be a Participant in the Plan.

5.2.Incentive Awards. Each Participant shall be eligible to receive an Incentive Award in connection with a particular Plan Year based on an individual’s contribution to the business of the Company, as determined by the Committee, which contribution may be assessed on nonobjective as well as objective measures.

5.3.Establishment of Performance Goals. Within ninety (90) days after the commencement of the Plan Year for which Incentive Awards are granted under the Plan (or such later date as the Committee shall determine), the Committee will set the performance goal(s) applicable to such Incentive Awards. Such performance goals may be different for different Participants. For example, the Committee may choose to use corporate performance goals in conjunction with individual performance goals for certain Participants and may set different performance goals for different Participants or classes of Participants.

5.4.Establishment of Incentive Award Targets. Within ninety (90) days after the commencement of the Plan Year for which Incentive Awards are granted under the Plan (or such later date as the Committee shall determine), the Committee will determinethe levels of payment (e.g., based on threshold, target, and maximum levels of attainment of the applicable performance goal(s)) in respect of such Incentive Awards, which may be set as either percentages of base salary or a range of dollar amounts. Such levels may, but need not, be the same with respect to each Participant or from Plan Year to another Plan Year. The Committee may, to the extent applicable, establish the weightings applicable to each Participant’s Incentive Award attributable to the level of attainment of the applicable performance goals. If established, such weightings shall be expressed as a percentage of the target-level payment in respect of the Incentive Award that can be earned based on the level of attainment of the applicable performance goal.

5.5.Determination of Awards and Payout. The Committee will certify the level of attainment, if any, of the performance goals applicable to Incentive Awards for each Plan Year and calculate the resulting levels of payment in respect of Incentive Awards under the Plan. The Committee may adjust any performance goals during or after the Plan Year to mitigate the impact of unusual or non-recurring gains and losses, accounting changes, acquisitions, divestitures or extraordinary or other items that were not foreseen at the time such performance goals were established. The Committee shall have the right, for any reason, to increase, reduce or eliminate any Incentive Award earned under the Plan, notwithstanding the achievement of (or failure to achieve) a specified performance goal. Incentive Awards earned by Participants under the Plan will be paid in cash as soon as reasonably practicable after the level of attainment of the applicable performance criteria has been certified by the Committee pursuant to this Section 5.5 and the amount has been approved by the Committee, but in no event (except as otherwise approved by the Committee) later than March 15 of the year following the year in which the Incentive Award is earned.

ARTICLE 6

Amendment, Modification and Termination

6.1.Amendment, Modification and Termination. The Committee may at any time and from time to time alter, amend, suspend, or terminate the Plan in whole or in part.

ARTICLE 7

General Provisions

7.1.Payment Recipient. All amounts payable under the Plan shall be paid to the appropriate Participant; provided, however, that a Participant may, by written instruction during the Participant’s lifetime on a form prescribed by Executive Compensation, designate one or more primary Beneficiaries to receive the amount payable hereunder following the Participant’s death, and may designate the proportions in which such Beneficiaries are to receive such payments. A Participant may change such designations from time to time, and the last written designation filed with the Committee prior to the Participant’s death shall control. A Beneficiary designation shall not be considered effective unless made on a form prescribed by Executive Compensation and which is delivered to Executive Compensation. If any Participant shall fail to designate a Beneficiary or shall designate a Beneficiary who shall fail to survive the Participant, the Beneficiary shall be the Participant’s beneficiary designated or otherwise determined under the employer-sponsored group life insurance plan covering the Participant, as amended from time to time.

7.2.Non-Assignability. None of the rights under the Plan shall be subject to the claim of any creditor of any Participant or Beneficiary, or to any legal process by any creditor of such Participant or Beneficiary, and none of them shall have

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any right to alienate, commute, anticipate, pledge, assign or encumber any of the rights under the Plan except to the extent expressly provided herein to the contrary.

7.3.No Right to Continued Employment. Participation in the Plan shall not give any employee any right to remain in the Company’s or any of its Subsidiaries’ employ. The Plan is not to be construed as a contract of employment for any period and does not alter the at-will status of any Participant.

7.4.Participant’s Rights Unsecured; Waiver and Release. The benefits payable under the Plan shall be paid by the Company each year out of the Company’s general assets. To the extent a Participant acquires the right to receive a payment under the Plan, such right shall be no greater than that of an unsecured general creditor of the Company. In consideration of the granting of the award, Participants may be required to execute an agreement which, among other things, waives and releases all claims, whether known or unknown, that the Participant may have against the Company, its affiliates, directors, officers, agents or employees arising out of or related to the Participant’s employment, except for those claims against the benefit plans of the Company. The waiver shall include such terms and conditions as shall be determined by the Committee in its discretion; provided that any such waiver and release shall comply with applicable laws and regulations, and, provided, further, that the Committee may direct that no waiver and release shall be obtained.

7.5.Income Tax Withholding and Offset. The Company and its Subsidiaries shall have the authority and the right to deduct or withhold, or require a Participant to remit to the Company or a Subsidiary, an amount sufficient to satisfy federal, state, and local taxes (including the Participant’s FICA obligation) required by law to be withheld with respect to any taxable event arising as a result of the Plan. The Company or applicable Subsidiary will offset against any amounts payable hereunder any advances, loans, debts, sales deficits or similar amounts a Participant owes the Company or any Subsidiaries or for which the Company or any Subsidiaries may be responsible.

7.6.Governing Law. This Plan, and the rights and obligations of the parties thereunder, will be governed by and construed in accordance with the laws of the State of Delaware.

7.7.Titles and Headings. The titles and headings of the Sections in the Plan are for convenience of reference only, and in the event of any conflict, the text of the Plan, rather than such titles or headings, shall control.

7.8.Gender and Number. Except where otherwise indicated by the context, any masculine term used herein also shall include the feminine; the plural shall include the singular and the singular shall include the plural.

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EX-10.45

Exhibit 10.45

RESTRICTED STOCK UNIT AGREEMENT

(Unum Group 2022 Stock Incentive Plan)

THIS AGREEMENT (this “Agreement”), dated as of [Grant Date], is entered into by and between Unum Group, a Delaware corporation (the “Company”), and [Participant Name] (the “Employee”).

W I T N E S S E T H

In consideration of the mutual promises and covenants made herein and the mutual benefits to be derived herefrom, the parties hereto agree as follows:

1.Grant, Vesting and Forfeiture of Restricted Stock Units.

(a)Grant. Subject to the provisions of this Agreement and to the provisions of the Unum Group 2022 Stock Incentive Plan (as the same may be amended, the “Plan”), the Company hereby grants to the Employee, as of [Grant Date] (the “Grant Date”), [Quantity Granted] Restricted Stock Units (the “Restricted Stock Units”), each with respect to one share of common stock of the Company, par value $0.10 per Share. All capitalized terms used herein, to the extent not defined, shall have the meaning set forth in the Plan.

(b)Vesting During the Restriction Period. Subject to the terms and conditions of this Agreement, the Restricted Stock Units shall vest and no longer be subject to any restriction on the anniversaries of the Grant Date set forth below (the period during which restrictions apply, the “Restriction Period”):

Vesting Dates (Anniversaries of Grant Date)	Percentage of Total Grant Vesting
First Anniversary	33%
Second Anniversary	33%
Third Anniversary	34%

(c)Termination of Employment.

(i) Upon the Employee’s Termination of Employment for any reason (other than as specified in Section 1(c)(ii) or 1(c)(iii) below) during the Restriction Period, all Restricted Stock Units still subject to restriction shall be forfeited.

(ii) Upon the Employee’s Termination of Employment during the Restriction Period due to the Employee’s death, Disability or Retirement, the restrictions applicable to the Restricted Stock Units shall lapse, and such Restricted Stock Units shall become free of all restrictions and become fully vested.

(iii) Upon the Employee’s Termination of Employment during the Restriction Period by the Company as a result of job elimination or requalification, the Employee shall vest in a number of Restricted Stock Units subject to each tranche that has not vested as of the date of the Termination of Employment equal to the product of (x) the number of Restricted Stock Units subject to such tranche that has not vested as of the date of the Termination of Employment and (y) a fraction, the numerator of which is the number of full and partial months that have lapsed from the Grant Date until the date of the Termination of Employment and the denominator of which is the total number of months in the Restriction Period applicable to such tranche. The benefits described this Section 1(c)(iii) shall also apply upon a Termination of Employment by the Employee for Good Reason if the Company has entered into a separate written agreement with the Employee providing for payments upon a Termination of Employment for Good Reason not upon or following a Change in Control, in which case “Good Reason” shall have the meaning ascribed to such term (or a similar term) in such agreement; provided, that, if the Employee is eligible for Retirement at the time of Termination of Employment by the Employee for Good Reason, the vesting of such Employee’s Restricted Stock Units shall be governed by Section 1(c)(ii) above.

(iv) For purposes of this Agreement and notwithstanding section 1(gg) of the Plan, “Retirement” shall mean the Employee’s Termination of Employment at a time when the sum of the Employee’s age and continuous years of service equals or exceeds 65, with a minimum age of 55 and a minimum of five years of continuous service if such Termination of Employment is approved as a “Retirement” by (1) the Committee in the case of an Employee who is subject to Section 16 of the Exchange Act, or (2) the Chief Executive Officer or Executive Vice President, People and Communications, in the case of all other individuals. Notwithstanding the foregoing or section 1(gg) of the Plan, in the event that Employee is subject to the laws of

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a foreign jurisdiction where the above definition would violate applicable law, “Retirement” shall mean the Employee’s Termination of Employment where the Employee ceases employment with the intention of ceasing to do any further work and on a date that has been agreed by both the Company and the Employee in writing in advance in compliance with such local legal requirements.

(v) For purposes of this Agreement, employment with the Company shall include employment with the Company’s Affiliates and successors. Nothing in this Agreement or the Plan shall confer upon the Employee any right to continue in the employ of the Company or any of its Affiliates or interfere in any way with the right of the Company or any such Affiliates to terminate the Employee’s employment at any time.

2.Settlement of Units.

Subject to Section 8 (pertaining to the withholding of taxes), as soon as practicable after the date on which the Restriction Period expires, and in no event later than 30 days after such date, the Company shall deliver to the Employee or his or her personal representative, in book-position or certificate form, one Share that does not bear any restrictive legend making reference to this Agreement for each Share subject to the Restricted Stock Unit. Notwithstanding the foregoing, the Company shall be entitled to hold the Shares issuable upon settlement of Restricted Stock Units that have vested until the Company shall have received from the Employee a duly executed Form W-9 or W-8, as applicable.

3.Nontransferability of the Restricted Stock Units.

During the Restriction Period and until such time as the Restricted Stock Units are ultimately settled as provided in Section 2 above, the Restricted Stock Units and Shares covered by the Restricted Stock Units shall not be transferable by the Employee by means of sale, assignment, exchange, encumbrance, pledge, hedge or otherwise; provided, however, that nothing in this Section 3 shall prevent transfers by will or by the applicable laws of descent and distribution. Any purported or attempted transfer of such Restricted Stock Units or Shares in contravention of this Section 3 shall be null and void.

4.Rights as a Stockholder.

The Employee shall not be entitled to any rights of a stockholder with respect to the Restricted Stock Units (including, without limitation, any voting rights); provided that with respect to any dividends paid on Shares while the Restricted Stock Units remain outstanding, such dividends will be notionally accounted for and shall vest and be settled in cash at such time as the underlying Restricted Stock Units vest and are settled.

5.Adjustment; Change in Control.

In the event of certain transactions during the Restriction Period, the Restricted Stock Units shall be subject to adjustment as provided in Section 3(d) of the Plan or any applicable successor provision under the Plan. Notwithstanding anything in Section 1 to the contrary: (a) upon the occurrence of a Change in Control, unless a Replacement Award is granted in respect of the Restricted Stock Units (in which case this clause (a) shall not apply), the restrictions applicable to the Restricted Stock Units shall lapse and such Restricted Stock Units shall become free of all restrictions and fully vested as of such Change in Control and shall be settled as soon as practicable following the date of such Change in Control (but not later than 30 days thereafter); and (b) if a Replacement Award is granted in respect of the Restricted Stock Units in connection with such Change in Control, upon a Termination of Employment of the Employee occurring upon or during the two years immediately following the date of such Change in Control by reason of death, Disability or Retirement, by the Company without Cause, or by the Employee for Good Reason (as defined in the Plan, except that if the Employee is covered by a separate written plan or agreement providing for payments upon a Termination of Employment for Good Reason upon or within two years following a Change in Control, then as such term (or a similar term) is defined in such plan or agreement), the restrictions applicable to such Replacement Award, to the extent not vested as of such Termination of Employment, shall lapse, and such Replacement Award shall become free of all restrictions and fully vested and shall be settled as soon as practicable following the date of Termination of Employment (but not later than 30 days thereafter); provided, however, that any Restricted Stock Units that constitute “nonqualified deferred compensation” as defined under Section 409A of the Code shall, to the extent necessary to avoid the imposition of penalty taxes under Section 409A of the Code, not be so settled unless the Change in Control constitutes a “change in control event” within the meaning of Section 409A of the Code (it being understood that nothing in this Section 5 shall preclude the Company from settling upon a Change in Control any Restricted Stock Units that are not replaced by a Replacement Award, to the extent effectuated in accordance with Treasury Reg. § 1.409A-3(j)(4)(ix)).

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6.Payment of Transfer Taxes, Fees and Other Expenses.

The Company agrees to pay any and all original issue taxes and stock transfer taxes that may be imposed on the issuance of shares received by an Employee in connection with the Restricted Stock Units, together with any and all other fees and expenses necessarily incurred by the Company in connection therewith.

7.Other Restrictions.

(a)The Restricted Stock Units shall be subject to the requirement that, if at any time the Committee shall determine that (i) the listing, registration or qualification of the Shares related thereto upon any securities exchange or under any applicable law is required, or (ii) the consent or approval of any government regulatory body is required, then in any such event, the grant of Restricted Stock Units shall not be effective unless such listing, registration, qualification, consent or approval shall have been effected or obtained free of any conditions not acceptable to the Committee.

(b)If the Employee is an insider as described under the Company’s Insider Trading Policy (as in effect from time to time and any successor policies), the Employee shall be required to obtain pre-clearance from the General Counsel or Securities Counsel of the Company prior to purchasing or selling any of the Company’s securities, including any shares issued upon vesting of the Restricted Stock Units, and may be prohibited from selling such securities other than during an open trading window. The Employee further acknowledges that, in its discretion, the Company may prohibit the Employee from selling such securities even during an open trading window if the Company has concerns over the potential for insider trading.

8.Taxes and Withholding.

No later than the date as of which an amount first becomes includible in the gross income of the Employee for federal, state, local or foreign income, employment or other tax purposes with respect to any Restricted Stock Units, the Employee shall pay to the Company, or make arrangements satisfactory to the Company regarding the payment of, all federal, state, local and foreign taxes that are required by applicable laws and regulations to be withheld with respect to such amount. The obligations of the Company under this Agreement shall be conditioned on compliance by the Employee with this Section 8, and the Company shall, to the extent permitted by law, have the unilateral right to deduct any such taxes from any payment otherwise due to the Employee, including deducting such amount from the delivery of shares upon settlement of the Restricted Stock Units that gives rise to the withholding requirement.

9.Confidentiality; Non-Competition; Non-Solicitation; Non-Disparagement.

(a)The Employee acknowledges that during the course of employment or engagement with the Company and its Affiliates the Employee has received and will continue to have access and exposure to secret and proprietary information, including but not limited to information about the Company’s and its Affiliates’ business, business practices and processes, customers, and prospective customers, the value of which is derived in part from the fact that the information is not generally known to the public (“Confidential Information”). The Employee acknowledges that the Company and its Affiliates have spent significant time, effort and resources protecting the Confidential Information and that the Confidential Information has contributed to customer goodwill and is of significant competitive value to the Company and its Affiliates in the businesses in which they compete, and that the use or disclosure, even if inadvertent, of the Confidential Information to or for the benefit of a competitor would cause significant damage to the legitimate business interests of the Company and its Affiliates. Accordingly, in order to protect the legitimate business and customer goodwill interests of the Company and its Affiliates, to protect the Confidential Information against inappropriate use or disclosure, and in consideration of the grant of and the opportunity to vest in the Restricted Stock Units in accordance with the provisions of this Agreement, the Employee hereby covenants and agrees to comply with the confidentiality, non-competition, non-solicitation and non-disparagement provisions set forth in this Section 9(a) (collectively, the “RSU Restrictions”). Except to the extent expressly provided otherwise below, the Employee agrees to comply with the RSU Restrictions for the period commencing on the Grant Date and extending through the date that is 12 months following the Employee’s Termination of Employment for any reason (such period, the “RSU Restricted Period”).

(i)The Employee will use Confidential Information gained during employment or engagement with the Company or any Affiliate for the benefit of the Company only and, without the prior written consent of the Company, shall not, at any time during the RSU Restricted Period or thereafter, directly or indirectly, divulge, reveal or communicate any Confidential Information to any person or entity whatsoever, or use any Confidential Information for the Employee’s own benefit or for the benefit of others, other than as required by law or legal process. For purposes of the foregoing, Confidential Information shall not include information that was or is available to the Employee on a non-confidential basis from a source other than the Company or becomes generally available to the public, other than as a result of disclosure by the Employee.

(ii)The Employee shall not, at any time during the RSU Restricted Period, without the prior written consent of the Company, directly or indirectly, own, manage, operate, join, control, or participate in the ownership, management,

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operation or control of, or be employed by, consult with, render services for, or be connected in any other manner with, any Competing Business, whether for compensation or otherwise. For the purposes of this Agreement, a “Competing Business” shall be any business in the United States which is engaged in the sale or provision of employee benefits or other products or services of the type offered by the Company or its Affiliates (including, without limitation, life, critical illness, income protection, disability, accident, dental, vision, hospital indemnity, and medical stop-loss insurance products, absence management services, and technological products or services provided by the Company's solutions business), unless the Employee’s primary duties and responsibilities with respect to such business are not related to the management, operation or provision of such products or services. Notwithstanding the requirements of this paragraph, the Employee shall not be prohibited from owning less than 1% of any publicly traded corporation, whether or not such corporation is deemed to be a Competing Business.

(iii)The Employee shall not, at any time during the RSU Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, solicit, assist, or induce any Covered Employee to terminate his or her relationship with the Company or its Affiliates (regardless of who first initiates the communication), or help another person or entity evaluate any Covered Employee as an employment candidate, or offer to employ, call on, or actively interfere with the Company’s or any Affiliate’s relationship with any Covered Employee, provided that this paragraph shall not prohibit general solicitations in the form of classified advertisements or the like in newspapers, on the internet, or in other media. For purposes of this Agreement, “Covered Employee” means an individual who is an employee, representative, or officer of the Company or any Affiliate at the time of the solicitation, assistance, or inducement or as of the date of the Employee’s Termination of Employment.

(iv)The Employee shall not, at any time during the RSU Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, use any Confidential Information to solicit or accept any business from any customers of the Company or any Affiliate, or any broker with regard to customers of the Company or any Affiliate (regardless of who first initiates the communication), whom the Employee serviced, solicited or had contact with while employed or engaged by the Company or any Affiliate.

(v)The Employee shall not, at any time during the RSU Restricted Period, directly or indirectly, disparage or make any statement, oral or written, public or in private, which is reasonably foreseeable as harming the Company’s or any Affiliate’s business interests or impacts negatively on the Company’s or any Affiliate’s business reputation or reputation in the community. Nothing in this paragraph will be construed to prevent the Employee from (x) truthfully communicating with or responding to a request for information from a federal, state, administrative agency or court or (y) discussing or disclosing information about unlawful acts in the workplace, such as harassment or discrimination or any other conduct that the Employee has reason to believe is unlawful.

(b)Any termination of the Employee’s employment or the termination or expiration of this Agreement shall have no effect on the continuing operation of this Section 9.

(c)The terms and provisions of this Section 9 are intended to be separate and divisible provisions and if, for any reason, any one or more of them is held to be invalid or unenforceable, neither the validity nor the enforceability of any other provision of this Agreement shall thereby be affected. The parties hereto acknowledge that the potential restrictions on the Employee’s future employment imposed by this Section 9 are reasonable in both duration and geographic scope and in all other respects. If for any reason any court of competent jurisdiction shall find any provisions of this Section 9 unreasonable in duration or geographic scope or otherwise, the Employee and the Company agree that the restrictions and prohibitions contained herein shall be effective to the fullest extent allowed under applicable law in such jurisdiction.

(d)The Employee acknowledges and agrees that any breach or threatened breach of the RSU Restrictions will result in substantial, continuing and irreparable injury to the Company and/or its Affiliates. Therefore, in addition to any other remedy that may be available to the Company and/or its Affiliates, the Company and/or its Affiliates shall be entitled to equitable and/or injunctive relief to prevent any breach or threatened breach of such provisions, and to specific performance of each of the terms thereof in addition to any other legal or equitable remedies that the Company or any Affiliate may have.

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10.Notices.

All notices and other communications under this Agreement shall be in writing and shall be given by hand delivery to the other party or by facsimile, overnight courier, or registered or certified mail, return receipt requested, postage prepaid, addressed as follows:

If to the Employee:

At the most recent address on file at the Company

If to the Company:

Unum Group

1 Fountain Square

Chattanooga, Tennessee 37402

Attention: Executive Compensation, Human Resources

or to such other address or facsimile number as any party shall have furnished to the other in writing in accordance with this Section 10. Notices and communications shall be effective when actually received by the addressee. Notwithstanding the foregoing, the Employee consents to electronic delivery of documents required to be delivered by the Company under the securities laws.

11.Effect of Agreement.

This Agreement is personal to the Employee and, without the prior written consent of the Company, shall not be assignable by the Employee otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable by the Employee’s legal representatives. This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns.

12.Laws Applicable to Construction; Consent to Jurisdiction.

The interpretation, performance and enforcement of this Agreement shall be governed by the laws of the State of Delaware without reference to principles of conflict of laws, as applied to contracts executed in and performed wholly within the State of Delaware. In addition to the terms and conditions set forth in this Agreement, the Restricted Stock Units are subject to the terms and conditions of the Plan, which is hereby incorporated by reference.

13.Severability.

The invalidity or enforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement.

14.Conflicts and Interpretation.

Except with regard to the definition of “Retirement” set forth in Section 1(c)(iv) hereof, in the event of any conflict between this Agreement and the Plan, the Plan shall control. In the event of any ambiguity in this Agreement, or any matters as to which this Agreement is silent, the Plan shall govern including, without limitation, the provisions thereof pursuant to which the Committee has the power, among others, to (a) interpret the Plan, (b) prescribe, amend and rescind rules and regulations relating to the Plan, and (c) make all other determinations deemed necessary or advisable for the administration of the Plan. The Employee hereby acknowledges that a copy of the Plan has been made available to him and agrees to be bound by all the terms and provisions thereof. The Employee and the Company each acknowledge that this Agreement (together with the Plan) constitutes the entire agreement and supersedes all other agreements and understandings, both written and oral, between the parties or either of them, with respect to the subject matter hereof.

15.Amendment.

The Company may modify, amend or waive the terms of the Restricted Stock Unit award, prospectively or retroactively, but no such modification, amendment or waiver shall materially impair the rights of the Employee without his or her consent, except as required by applicable law, stock exchange rules, tax rules or accounting rules. The waiver by either party of compliance with any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by such party of a provision of this Agreement.

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16.Section 409A.

It is the intention of the Company that the Restricted Stock Units shall either (a) not constitute “nonqualified deferred compensation” as defined under Section 409A of the Code, or (b) comply in all respects with the requirements of Section 409A of the Code and the regulations promulgated thereunder, such that no delivery of or failure to deliver Shares pursuant to this Agreement will result in the imposition of taxation or penalties as a consequence of the application of Section 409A of the Code. Restricted Stock Units that (i) constitute “nonqualified deferred compensation” as defined under Section 409A of the Code and (ii) vest as a consequence of the Employee’s termination of employment shall not be delivered until the date that the Employee incurs a “separation from service” within the meaning of Section 409A of the Code (or, if the Employee is a “specified employee” within the meaning of Section 409A of the Code and the regulations promulgated thereunder, the date that is six months following the date of such “separation from service”). If the Company determines after the Grant Date that an amendment to this Agreement is necessary to ensure the foregoing, it may make such an amendment, notwithstanding Section 15 above, effective as of the Grant Date or any later date, without the consent of the Employee.

17.Headings.

The headings of Sections herein are included solely for convenience of reference and shall not affect the meaning or interpretation of any of the provisions of this Agreement.

18.Counterparts.

This Agreement may be executed in counterparts, which together shall constitute one and the same original.

19.Waiver and Release.

In consideration for the granting of the Restricted Stock Units, the Employee hereby waives any and all claims whether known or unknown that the Employee may have against the Company and its Subsidiaries and Affiliates and their respective directors, officers, shareholders, agents or employees arising out of, in connection with or related to the Employee’s employment, except for (1) claims under this Agreement, (2) claims that arise after the date hereof and obligations that by their terms are to be performed after the date hereof, (3) claims for compensation or benefits under any compensation or benefit plan or arrangement of the Company and its Subsidiaries and Affiliates, (4) claims for indemnification respecting acts or omissions in connection with the Employee’s service as a director, officer or employee of the Company or any of its Subsidiaries and Affiliates, (5) claims for insurance coverage under directors’ and officers’ liability insurance policies maintained by the Company or any of its Subsidiaries or Affiliates, (6) any right the Employee may have to obtain contribution in the event of the entry of judgment against the Company as a result of any act or failure to act for which both the Employee and the Company or any of its Subsidiaries or Affiliates are jointly responsible, or (7) claims under the California Fair Employment and Housing Act. The Employee waives any and all rights under the laws of any state (expressly including but not limited to Section 1542 of the California Civil Code), which is substantially similar in wording or effect as follows:

A general release does not extend to claims that the creditor or releasing party does not know or suspect to exist in his or her favor at the time of executing the Release and that, if known by him or her, would have materially affected his or her settlement with the debtor or released party.

This waiver specifically includes all claims under the Age Discrimination in Employment Act of 1967, as amended. The Employee acknowledges that the Employee (a) has been advised to consult an attorney in connection with entering into this Agreement; (b) has 21 days to consider this waiver and release; and (c) may revoke this waiver and release within seven days of execution upon written notice to Legal Counsel, Employment and Labor, Law Department, Unum Group, 1 Fountain Square, Chattanooga, Tennessee 37402. The waiver and release will not become enforceable until the expiration of the seven-day period. If the waiver and release is revoked during such seven-day period, the grant shall be void and of no further effect.

20.Clawback.

Notwithstanding any provisions in this Agreement to the contrary, the Employee hereby acknowledges and agrees that any Shares or other amounts paid or provided to the Employee pursuant to this Agreement (including any gains realized on Shares issued pursuant to this Agreement), which Shares or amounts are subject to recovery for any reason under any law, government regulation, stock exchange listing requirement, or any policy adopted by the Company from time to time, will be subject to such deductions and clawback as may be required to be made pursuant to such law, government regulation, stock exchange listing requirement, or policy as in effect from time to time.

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21.Disclosures.

Nothing in this Agreement shall be construed to restrict the Employee’s ability to make a confidential disclosure of any trade secret or other confidential information, without notice to or approval by the Company, to a government official or an attorney for the sole purpose of reporting or assisting in the investigation of a suspected violation of law and the Employee shall not be held liable under this Agreement or under any federal or state trade secret law for any such disclosure.

22.Foreign Jurisdictions.

This Agreement shall be construed, interpreted and applied in such a manner as shall be necessary to comply with any legal or regulatory requirements of any non-United States jurisdiction to which the Employee is or becomes subject. The Company hereby delegates to each of the officers of the Company the authority for the interpretation of such matters, whose interpretations shall be final, binding and conclusive on the Employee and all individuals claiming any rights or benefits hereunder. The following provisions shall also apply only with respect to non-U.S. employees:

(a)    The Employee shall have no rights under any employment agreement (or any alleged breach of it), whether on termination of his or her employment (whether lawfully or in breach) or otherwise, to any damages for breach of contract in respect of the loss of any benefits or any rights (including the grant or vesting of any share options or equity incentives) that he or she may have received had he or she continued to have been employed.

(b)    By executing this Agreement, the Employee also agrees to, and shall be deemed to have provided to the Company, the data protection and monitoring acknowledgement set forth in Schedule 1 attached hereto.

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IN WITNESS WHEREOF, as of the date first above written, the Company has caused this Agreement to be executed on its behalf by a duly authorized officer and the Employee has hereunto set the Employee’s hand.

Date: [Acceptance Date]	EMPLOYEE: [Participant Name]
	[Signature]
	UNUM GROUP
	By:
		[Signature]
		[Name]
		[Title]

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SCHEDULE 1 (FOR NON-U.S. EMPLOYEES)

Data Protection and Monitoring Acknowledgement

To: [Name of Employer] (the “Company”)

I hereby acknowledge having been informed that the Company and Affiliates may hold and process information about me for legal, personnel, administrative and management purposes and, in particular, collecting and processing: (a) contact information to create and maintain my employee records, grant me access to internal systems, manage an internal employee directory, and communicate with me for business purposes or emergencies; (b) national identification information to ensure my eligibility to work; (c) information about the duration of sick leave to monitor sick leave and sick pay, to administer benefits and take decisions as to my fitness to work or the need for adjustments in the workplace; (d) performance and job-related information, qualifications, and professional memberships to administer performance reviews, benefits and other awards, staff restructuring, conflict of interest reporting, as well as assess my personal and professional development; (e) disciplinary, capability, and conduct information required to carry out disciplinary and grievance procedures, internal investigations and considering reports (which may be submitted anonymously) under any whistle-blowing procedure; (f) any information relating to criminal proceedings in which I have been involved to determine my suitability for certain jobs; and (g) financial, salary, and benefits information for the payment of wages and other benefits; (h) biometric information to monitor and record my hours of work where permitted by law; and (i) beneficiaries, dependents, and emergency contact information to administer benefits and contact the designated contacts in the case of emergency (my “Personal Data”).

I understand that, notwithstanding anything to the contrary herein, Company may process my Personal Data without my consent under certain lawful bases, including when processing is necessary for the performance of a contract to which I am a party; when processing is necessary for compliance with a legal requirement; or when processing is necessary to protect vital interests.

I agree that the Company may make my Personal Data available to Affiliates, those who provide products or services to the Company and Affiliates (such as advisers and payroll administrators), regulatory authorities, potential or future employers, governmental or quasi-governmental organizations, current or potential investors and potential purchasers of the Company or the business in which I work. I agree that the Company may use and make my Personal Data available to third parties to comply with obligations to third parties; establish or defend legal claims or allegations; and detect security incidents, protect against malicious deceptive, fraudulent, or illegal activity.

I understand that my Personal Data may be transferred to any Affiliate established outside the European Economic Area, and in particular to the United States. I acknowledge that these countries may not have laws in place to adequately protect my privacy, but that a Data Transfer Agreement which utilized EU Model Clauses has been implemented with such Affiliates.

I understand that all communications (whether by telephone, email or any other means) which are transmitted, undertaken or received using Company property or on Company premises will be treated by the Company as work related and are subject to occasional interception, recording and monitoring without further notice. I do not regard any such communications as private and I consent to such interception, recording and monitoring.

Interception, recording and monitoring of communications is intended to protect the Company’s business interests (for example, but without limitation, for the purposes of quality control, security of communication and IT systems, record-keeping and evidential requirements, detection and prevention of criminal activity or misconduct and to assist the Company to comply with relevant legal requirements). I acknowledge that intercepted communications may be used as evidence in any disciplinary or legal proceedings.

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I understand that I have the right to withdraw my agreement to the collection and processing of my Personal Data. If I would like to withdraw my agreement, I can contact the Privacy Office at privacy@unum.com or 1-877-684-1241.

I have read, understood and agreed to the above of my own free will.

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EX-10.46

Exhibit 10.46

RESTRICTED STOCK UNIT AGREEMENT

(Unum Group 2022 Stock Incentive Plan – Sub-plan for U.K. and Republic of Ireland)

THIS AGREEMENT (this “Agreement”), dated as of [Grant Date], is entered into by and between Unum Group, a Delaware corporation (the “Company”), and [Participant Name] (the “Employee”).

W I T N E S S E T H

In consideration of the mutual promises and covenants made herein and the mutual benefits to be derived herefrom, the parties hereto agree as follows:

1.Grant, Vesting and Forfeiture of Restricted Stock Units.

(a)Grant. Subject to the provisions of this Agreement and to the provisions of the Sub-plan for U.K. and Republic of Ireland (as the same may be amended, the “Sub-plan”) of the Unum Group 2022 Stock Incentive Plan (as the same may be amended, the “Plan”), the Company hereby grants to the Employee, as of [Grant Date] (the “Grant Date”), [Quantity Granted] Restricted Stock Units (the “Restricted Stock Units”), each with respect to one share of common stock of the Company, par value $0.10 per Share. All capitalized terms used herein, to the extent not defined, shall have the meaning set forth in the Sub-plan and the Plan.

(b)Vesting During the Restriction Period. Subject to the terms and conditions of this Agreement, the Restricted Stock Units shall vest and no longer be subject to any restriction on the anniversaries of the Grant Date set forth below (the period during which restrictions apply, the “Restriction Period”):

Vesting Dates (Anniversaries of Grant Date)	Percentage of Total Grant Vesting
First Anniversary	33%
Second Anniversary	33%
Third Anniversary	34%

(c)Termination of Employment.

(i) Upon the Employee’s Termination of Employment for any reason (other than as specified in Section 1(c)(ii) or 1(c)(iii) below) during the Restriction Period, all Restricted Stock Units still subject to restriction shall be forfeited.

(ii) Upon the Employee’s Termination of Employment during the Restriction Period due to the Employee’s death, Disability or Retirement, the restrictions applicable to the Restricted Stock Units shall lapse, and such Restricted Stock Units shall become free of all restrictions and become fully vested.

(iii) Upon the Employee’s Termination of Employment during the Restriction Period by the Company as a result of redundancy, the Employee shall vest in a number of Restricted Stock Units subject to each tranche that has not vested as of the date of the Termination of Employment equal to the product of (x) the number of Restricted Stock Units subject to such tranche that has not vested as of the date of the Termination of Employment and (y) a fraction, the numerator of which is the number of full and partial months that have lapsed from the Grant Date until the date of the Termination of Employment and the denominator of which is the total number of months in the Restriction Period applicable to such tranche. The benefits described this Section 1(c)(iii) shall also apply upon a Termination of Employment by the Employee for Good Reason if the Company has entered into a separate written agreement with the Employee providing for payments upon a Termination of Employment for Good Reason not upon or following a Change in Control, in which case “Good Reason” shall have the meaning ascribed to such term (or a similar term) in such agreement; provided, that, if the Employee is eligible for Retirement at the time of Termination of Employment by the Employee for Good Reason, the vesting of such Employee’s Restricted Stock Units shall be governed by Section 1(c)(ii) above.

(iv) For purposes of this Agreement, employment with the Company shall include an office or employment with the Company, its Affiliates and their successors. Nothing in this Agreement, the Sub-plan or the Plan shall confer upon the Employee any right to continue in the employment of, or holding an office with, the Company or any of its Affiliates or interfere in any way with the right of the Company or any Affiliate to terminate the Employee’s office or employment at any time.

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2.Settlement of Units.

Subject to Section 8 (pertaining to the withholding of taxes), as soon as practicable after the date on which the Restriction Period expires, and in no event later than 30 days after such date, the Company shall deliver to the Employee or his or her personal representative, in book-position or certificate form, one Share that does not bear any restrictive legend making reference to this Agreement for each Share subject to the Restricted Stock Unit. Notwithstanding the foregoing, the Company shall be entitled to hold the Shares issuable upon settlement of Restricted Stock Units that have vested until the Company shall have received from the Employee a duly executed Form W-9 or W-8, as applicable.

3.Nontransferability of the Restricted Stock Units.

During the Restriction Period and until such time as the Restricted Stock Units are ultimately settled as provided in Section 2 above, the Restricted Stock Units and Shares covered by the Restricted Stock Units shall not be transferable by the Employee by means of sale, assignment, exchange, encumbrance, pledge, hedge or otherwise; provided, however, that nothing in this Section 3 shall prevent transfers by will or by the applicable laws of descent and distribution. Any purported or attempted transfer of such Restricted Stock Units or Shares in contravention of this Section 3 shall be null and void.

4.Rights as a Stockholder.

The Employee shall not be entitled to any rights of a stockholder with respect to the Restricted Stock Units (including, without limitation, any voting rights); provided that with respect to any dividends paid on Shares while the Restricted Stock Units remain outstanding, such dividends will be notionally accounted for and shall vest and be settled in cash at such time as the underlying Restricted Stock Units vest and are settled.

5.Adjustment; Change in Control.

In the event of certain transactions during the Restriction Period, the Restricted Stock Units shall be subject to adjustment as provided in Section 3(d) of the Plan or any applicable successor provision under the Plan. Notwithstanding anything in Section 1 to the contrary: (a) upon the occurrence of a Change in Control, unless a Replacement Award is granted in respect of the Restricted Stock Units (in which case this clause (a) shall not apply), the restrictions applicable to the Restricted Stock Units shall lapse and such Restricted Stock Units shall become free of all restrictions and fully vested as of such Change in Control and shall be settled as soon as practicable following the date of such Change in Control (but not later than 30 days thereafter); and (b) if a Replacement Award is granted in respect of the Restricted Stock Units in connection with such Change in Control, upon a Termination of Employment of the Employee occurring upon or during the two years immediately following the date of such Change in Control by reason of death, Disability or Retirement, by the Company without Cause, or by the Employee for Good Reason (as defined in the Plan, except that if the Employee is covered by a separate written plan or agreement providing for payments upon a Termination of Employment for Good Reason upon or within two years following a Change in Control, then as such term (or a similar term) is defined in such plan or agreement), the restrictions applicable to such Replacement Award, to the extent not vested as of such Termination of Employment, shall lapse, and such Replacement Award shall become free of all restrictions and fully vested and shall be settled as soon as practicable following the date of Termination of Employment (but not later than 30 days thereafter); provided, however, if the Employee is a citizen of the United States or otherwise subject to US Federal Income Tax in respect of the Restricted Stock Units that any Restricted Stock Units that constitute “nonqualified deferred compensation” as defined under Section 409A of the Code shall, to the extent necessary to avoid the imposition of penalty taxes under Section 409A of the Code, not be so settled unless the Change in Control constitutes a “change in control event” within the meaning of Section 409A of the Code (it being understood that nothing in this Section 5 shall preclude the Company from settling upon a Change in Control any Restricted Stock Units that are not replaced by a Replacement Award, to the extent effectuated in accordance with Treasury Reg. § 1.409A-3(j)(4)(ix) if the Employee is a citizen of the United States or otherwise subject to US Federal Income Tax in respect of the Restricted Stock Units).

6.Payment of Transfer Taxes, Fees and Other Expenses.

The Company agrees to pay any and all original issue taxes and stock transfer taxes that may be imposed on the issuance of shares received by an Employee in connection with the Restricted Stock Units, together with any and all other fees and expenses necessarily incurred by the Company in connection therewith.

7.Other Restrictions.

(a)The Restricted Stock Units shall be subject to the requirement that, if at any time the Committee shall determine that (i) the listing, registration or qualification of the Shares related thereto upon any securities exchange or under any applicable law is required, or (ii) the consent or approval of any government regulatory body is required, then in any such

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event, the grant of Restricted Stock Units shall not be effective unless such listing, registration, qualification, consent or approval shall have been effected or obtained free of any conditions not acceptable to the Committee.

(b)If the Employee is an insider as described under the Company’s Insider Trading Policy (as in effect from time to time and any successor policies), the Employee shall be required to obtain pre-clearance from the General Counsel or Securities Counsel of the Company prior to purchasing or selling any of the Company’s securities, including any shares issued upon vesting of the Restricted Stock Units, and may be prohibited from selling such securities other than during an open trading window. The Employee further acknowledges that, in its discretion, the Company may prohibit the Employee from selling such securities even during an open trading window if the Company has concerns over the potential for insider trading.

8.Taxes and Withholding.

(a)    The Employee irrevocably undertakes to:

(i)    pay to the Company, his or her employer or former employer (as appropriate) the amount of any Tax Liability; or

(ii)    enter into arrangements to the satisfaction of the Company, his or her employer or former employer (as appropriate) for payment of any Tax Liability.

(b)    The Employee irrevocably undertakes that, at the request of the Company, his or her employer or former employer, the Employee shall join that person in making a valid election to transfer to the Employee the whole or any part of the liability for employer national insurance contributions (or any similar liability for social security contribution in any jurisdiction) which:

(i)    the Company or any employer (or former employer) of the Employee may become liable to pay as a result of any Taxable Event; and

(ii)    may be lawfully transferred from the Company or any employer (or former employer) to the Employee.

(c)    If required to do so by the Company, the Employee irrevocably undertakes, in relation to any Shares delivered to the Employee pursuant to Section 2, to enter into a joint election under section 431(1) or section 431(2) of the Income Tax (Earnings and Pensions) Act 2003 of the United Kingdom before the date falling 14 days after the Employee acquires the relevant Shares. The Employee hereby appoints the Company (acting by any of its directors or officers from time to time) as his or her agent to execute any joint election required to be entered into under this Section in the name and on behalf of the Employee.

(d)    The obligations of the Company under this Agreement shall be conditioned on compliance by the Employee with this Section 8, and the Company shall not deliver Shares in respect of the Restricted Stock Units unless and until the Employee has made arrangements satisfactory to the Committee to satisfy his or her obligations under this clause. Unless the Employee pays the Tax Liability to the Company, employer or former employer by cash or cheque, withholding may be effected, at the Company’s option, by withholding Shares issuable in connection with the Restricted Stock Units (provided that the Shares may be withheld only to the extent that such withholding will not result in adverse accounting treatment for the Company). The Employee acknowledges that the Company, the employer and any former employer have the right to deduct any taxes required to be withheld by law in connection with the Restricted Stock Units from any amounts payable by it to the Employee (including, without limitation, future cash wages). The Employee’s obligations under Section 8(a) shall not be affected by any failure of the Company or employer or former employer to withhold shares or deduct from payments of remuneration under this Section 8(d).

(e)    In this Section 8 references to “employer” and “former employer” include a company of which the Employee is a director or other officer (or any company of which the Employee was formerly a director or other officer).

9.Confidentiality; Non-Competition; Non-Solicitation; Non-Disparagement.

(a)The Employee acknowledges that during the course of employment or engagement with the Company and its Affiliates the Employee has received and will continue to have access and exposure to secret and proprietary information, including but not limited to information about the Company’s and its Affiliates’ business, business practices and processes, customers, and prospective customers, the value of which is derived in part from the fact that the information is not generally known to the public (“Confidential Information”). The Employee acknowledges that the Company and its Affiliates have spent significant time, effort and resources protecting the Confidential Information and that the Confidential Information has contributed to customer goodwill and is of significant competitive value to the Company and its Affiliates in the businesses in

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which they compete, and that the use or disclosure, even if inadvertent, of the Confidential Information to or for the benefit of a competitor would cause significant damage to the legitimate business interests of the Company and its Affiliates. Accordingly, in order to protect the legitimate business and customer goodwill interests of the Company and its Affiliates, to protect the Confidential Information against inappropriate use or disclosure, and in consideration of the grant of and the opportunity to vest in the Restricted Stock Units in accordance with the provisions of this Agreement, the Employee hereby covenants and agrees to comply with the confidentiality, non-competition, non-solicitation and non-disparagement provisions set forth in this Section 9(a) (collectively, the “RSU Restrictions”). Except to the extent expressly provided otherwise below, the Employee agrees to comply with the RSU Restrictions for the period commencing on the Grant Date and extending through the date that is 12 months following the earlier of: (i) Employee’s Termination of Employment for any reason or (ii) the last day on which the Employee carried out any duties for the Company and its Affiliates (such period, the “RSU Restricted Period”).

(i)The Employee will use Confidential Information gained during employment or engagement with the Company or any Affiliate for the benefit of the Company only and, without the prior written consent of the Company, shall not, at any time during the RSU Restricted Period or thereafter, directly or indirectly, divulge, reveal or communicate any Confidential Information to any person or entity whatsoever, or use any Confidential Information for the Employee’s own benefit or for the benefit of others, other than as required by law or legal process. For purposes of the foregoing, Confidential Information shall not include information that was or is available to the Employee on a non-confidential basis from a source other than the Company or becomes generally available to the public, other than as a result of disclosure by the Employee.

(ii)The Employee shall not, at any time during the RSU Restricted Period, without the prior written consent of the Company, directly or indirectly, own, manage, operate, join, control, or participate in the ownership, management, operation or control of, or be employed by, consult with, render services for, or be connected in any other manner with, any Competing Business, whether for compensation or otherwise. For the purposes of this Agreement, a “Competing Business” shall be any business in the United Kingdom which is engaged in the sale or provision of employee benefits or other products or services of the type offered by the Company or its Affiliates (including, without limitation, life, critical illness, income protection, disability, accident, dental, vision, hospital indemnity, and medical stop-loss insurance products, absence management services, and technological products or services provided by the Company's solutions business), unless the Employee’s primary duties and responsibilities with respect to such business are: (i) not related to the management, operation or provision of such products or services; or (ii) related to the management, operation or provision of such products or services in territories in which the Employee was neither involved nor concerned during the 12 months prior to the Employee’s Termination of Employment or about which the Employee was not in possession of Confidential Information as at the date of such termination; or (iii) related to the management, operation or provision of products or services with which the Employee was neither involved nor concerned during the 12 months prior to the Employee’s Termination of Employment or about which the Employee was not in possession of Confidential Information as at the date of such termination. Notwithstanding the requirements of this paragraph, the Employee shall not be prohibited from owning less than 1% of any publicly traded corporation, whether or not such corporation is deemed to be a Competing Business.

(iii)The Employee shall not, at any time during the RSU Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, solicit, assist, or induce any Covered Employee to terminate his or her relationship with the Company or its Affiliates (regardless of who first initiates the communication), or help another person or entity evaluate any Covered Employee as an employment candidate, or offer to employ, call on, or actively interfere with the Company’s or any Affiliate’s relationship with any Covered Employee, provided that this paragraph shall not prohibit general solicitations in the form of classified advertisements or the like in newspapers, on the internet, or in other media. For purposes of this Agreement, “Covered Employee” means an individual who is an employee, representative, or officer of the Company or any Affiliate at the time of the solicitation, assistance or inducement or as of the date of the Employee’s Termination of Employment and who was employed in a senior, technical, management or research capacity or who was otherwise in possession of Confidential Information and, in each case, who was supervised by or worked with the Employee during the 12 months prior to the Employee’s Termination of Employment.

(iv)The Employee shall not, at any time during the RSU Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, use any Confidential Information solicit or accept any business from any customers of the Company or any Affiliate, or any broker with regard to customers of the Company or any Affiliate (regardless of who first initiates the communication), whom the Employee serviced, solicited or had contact on behalf of the Company or any Affiliate during the 12 months prior to the commencement of the RSU Restricted Period.

(v)The Employee shall not, at any time during the RSU Restricted Period, directly or indirectly, disparage or make any statement, oral or written, public or in private, which is reasonably foreseeable as harming the Company’s

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or any Affiliate’s business interests or impacts negatively on the Company’s or any Affiliate’s business reputation or reputation in the community. Nothing in this paragraph will be construed to prevent the Employee from (x) truthfully communicating with or responding to a request for information from a federal, state, administrative agency or court or (y) discussing or disclosing information about unlawful acts in the workplace, such as harassment or discrimination or any other conduct that the Employee has reason to believe is unlawful.

(b)Any termination of the Employee’s employment or the termination or expiration of this Agreement shall have no effect on the continuing operation of this Section 9.

(c)The terms and provisions of this Section 9 are intended to be separate and divisible provisions and if, for any reason, any one or more of them is held to be invalid or unenforceable, neither the validity nor the enforceability of any other provision of this Agreement shall thereby be affected. The parties hereto acknowledge that the potential restrictions on the Employee's future employment imposed by this Section 9 are reasonable in both duration and geographic scope and in all other respects. If for any reason any court of competent jurisdiction shall find any provisions of this Section 9 unreasonable in duration or geographic scope or otherwise, the Employee and the Company agree that the restrictions and prohibitions contained herein shall be effective to the fullest extent allowed under applicable law in such jurisdiction.

(d)The Employee acknowledges and agrees that any breach or threatened breach of the RSU Restrictions will result in substantial, continuing and irreparable injury to the Company and/or its Affiliates. Therefore, in addition to any other remedy that may be available to the Company and/or its Affiliates, the Company and/or its Affiliates shall be entitled to equitable and/or injunctive relief to prevent any breach or threatened breach of such provisions, and to specific performance of each of the terms thereof in addition to any other legal or equitable remedies that the Company or any Affiliate may have.

10.Privacy and data protection

(a)    The Employee consents to the Company, Subsidiaries and Affiliates holding and processing information about the Employee for legal, personnel, administrative and management purposes and, in particular, holding and processing: (i) health records and any medical reports to monitor sick leave and sick pay, to administer benefits and take decisions as to the Employee’s fitness to work or the need for adjustments in the workplace; (ii) information required to carry out performance reviews, disciplinary and grievance procedures, internal investigations and considering reports (which may be submitted anonymously) under any whistle-blowing procedure; (iii) any information relating to criminal proceedings in which the Employee has been involved; and (iv) to comply with legal requirements and obligations to third parties (“Personal Data”). The Employee agree that the Company may make the Personal Data available to Subsidiaries and Affiliates, those who provide products or services to the Company, Subsidiaries and Affiliates (such as advisers and payroll administrators), regulatory authorities, potential or future employers, governmental or quasi-governmental organisations, current or potential investors and potential purchasers of the Company, Subsidiaries, Affiliates or the business in which the Employee works.

(b)    The Employee consents to the transfer of Personal Data to the Company and to any Subsidiary or Affiliate established outside the European Economic Area, and in particular to the United States. The Employee acknowledges that these countries may not have laws in place to adequately protect the Employee’s privacy. The Employee confirms that he or she understands that all communications (whether by telephone, email or any other means) which are transmitted, undertaken or received using property of the Company or any Subsidiary or Affiliate or on the premises of the Company or any Subsidiary or Affiliate will be treated as work related and are subject to occasional interception, recording and monitoring without further notice. The Employee confirms that he or she does not regard any such communications as private and consents to such interception, recording and monitoring. Interception, recording and monitoring of communications is intended to protect the business interests of the Company and its Subsidiaries and Affiliates (for example, but without limitation, for the purposes of quality control, security of communication and IT systems, record-keeping and evidential requirements, detection and prevention of criminal activity or misconduct and to assist the Company and its Subsidiaries and Affiliates to comply with relevant legal requirements). The Employee acknowledges that intercepted communications may be used as evidence in any disciplinary or legal proceedings.

THE EMPLOYEE CONFIRMS THAT HE OR SHE HAS READ, UNDERSTOOD AND AGREED TO THE PROVISIONS OF THIS SECTION 10 OF HIS OR HER OWN FREE WILL.

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11.Notices.

All notices and other communications under this Agreement shall be in writing and shall be given by hand delivery to the other party or by facsimile, courier, or registered airmail (postage prepaid) addressed as follows:

If to the Employee:

At the most recent address on file at the Company

If to the Company:

Unum Group

1 Fountain Square

Chattanooga, Tennessee 37402

Attention: Executive Compensation, Human Resources

or to such other address or facsimile number as any party shall have furnished to the other in writing in accordance with this Section 11. Notices and communications shall be effective when actually received by the addressee. Notwithstanding the foregoing, the Employee consents to electronic delivery of documents required to be delivered by the Company under the securities laws.

12.Effect of Agreement.

(a)    This Agreement is personal to the Employee and, without the prior written consent of the Company, shall not be assignable by the Employee otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable by the Employee’s legal representatives. This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns.

(b)    A person who is not a party to this Agreement shall not have any rights under or in connection with it, except where such rights arise as a result of this Agreement for the Company or any employer or former employer of the Employee. The rights of the Employee to surrender, terminate or rescind this Agreement, or agree any variation, waiver or settlement of it, are not subject to the consent of any other person.

13.Laws Applicable to Construction; Consent to Jurisdiction.

(a)    The interpretation, performance and enforcement of this Agreement (including non-contractual disputes or claims) shall be governed and construed by the laws of the State of Delaware without reference to principles of conflict of laws, as applied to contracts executed in and performed wholly within the State of Delaware. The parties agree that the courts of the State of Delaware shall have non-exclusive jurisdiction to settle any dispute or claim arising out of or in connection with this deed or its subject matter or formation (including non-contractual disputes or claims).

(b)    The Parties irrevocably consent to any process in any legal action or proceedings under this Section 13 being served on it in accordance with the provisions of this Agreement relating to service of notices. Nothing contained in this Agreement shall affect the right to serve process in any other manner permitted by law.

(c)    In addition to the terms and conditions set forth in this Agreement, the Restricted Stock Units are subject to the terms and conditions of the Plan and the Sub-plan, which are hereby incorporated by reference.

14.Severability.

The invalidity or enforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement.

15.Conflicts and Interpretation.

In the event of any conflict between this Agreement, the Plan or the Sub-plan, the Sub-plan shall control. In the event of any ambiguity in this Agreement, or any matters as to which this Agreement is silent, the Sub-plan shall govern including, without limitation, the provisions thereof pursuant to which the Committee has the power, among others, to (a) interpret the Plan, (b) prescribe, amend and rescind rules and regulations relating to the Plan and Sub-plan, and (c) make all other determinations deemed necessary or advisable for the administration of the Plan and Sub-plan. The Employee hereby acknowledges that a copy of the Plan and the Sub-plan has been made available to the Employee and agrees to be bound by all the terms and provisions

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thereof. The Employee and the Company each acknowledge that this Agreement (together with the Plan and the Sub-plan) constitutes the entire agreement and supersedes all other agreements and understandings, both written and oral, between the parties or either of them, with respect to the subject matter hereof.

16.Amendment.

The Company may modify, amend or waive the terms of the Restricted Stock Unit award, prospectively or retroactively, but no such modification, amendment or waiver shall materially impair the rights of the Employee without his or her consent, except as required by applicable law, stock exchange rules, tax rules or accounting rules. The waiver by either party of compliance with any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by such party of a provision of this Agreement.

17.Section 409A.

It is the intention of the Company that the Restricted Stock Units awarded to an Employee who is a citizen of the United States of America or otherwise subject to United States Federal Income Tax shall either (a) not constitute “nonqualified deferred compensation” as defined under Section 409A of the Code, or (b) comply in all respects with the requirements of Section 409A of the Code and the regulations promulgated thereunder, such that no delivery of or failure to deliver Shares pursuant to this Agreement will result in the imposition of taxation or penalties as a consequence of the application of Section 409A of the Code. Restricted Stock Units that (i) constitute “nonqualified deferred compensation” as defined under Section 409A of the Code and (ii) vest as a consequence of the Employee’s termination of employment shall not be delivered until the date that the Employee incurs a “separation from service” within the meaning of Section 409A of the Code (or, if the Employee is a “specified employee” within the meaning of Section 409A of the Code and the regulations promulgated thereunder, the date that is six months following the date of such “separation from service”). If the Company determines after the Grant Date that an amendment to this Agreement is necessary to ensure the foregoing, it may make such an amendment, notwithstanding Section 15 above, effective as of the Grant Date or any later date, without the consent of the Employee.

18.Headings.

The headings of Sections herein are included solely for convenience of reference and shall not affect the meaning or interpretation of any of the provisions of this Agreement.

19.Counterparts.

This Agreement may be executed in counterparts, which together shall constitute one and the same original.

20.Terms of Office or Employment.

(a)    The Employee acknowledges and undertakes that:

(i)    subject to Section 9, his or her rights and obligations as an employee or director of the Company or any of its Affiliates shall not be affected by grant of the Restricted Stock Unit award or the delivery of Shares pursuant to such award; and

(ii)    subject to Section 4, the grant of the Restricted Stock Unit award or the delivery of Shares pursuant to such units gives the Employee no right or expectation to receive further opportunities to acquire Shares, except for any rights which might be available to shareholders as such.

(b)    The Employee irrevocably waives any rights that may arise to compensation or damages on account of any loss in respect of the Restricted Stock Unit award or the delivery of Shares pursuant to such award where such loss arises (or is claimed to arise), in whole or in part, from:

(i)    termination of the Employee’s office or employment with; or

(ii)    notice to terminate the Employee’s office or employment given by or to,

the Company, any Affiliate or former Affiliate. This waiver shall apply however termination of office or employment, or the giving of notice, is caused, and however compensation or damages may be claimed.

(c)    The Employee irrevocably waives any rights to compensation or damages that may arise on account of any loss in respect of the Restricted Stock Unit award or the delivery of Shares pursuant to such award where such loss arises (or is claimed to arise), in whole or in part, from:

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(i)    any company which employs the Employee, or in which the Employee holds office, ceasing to be an Affiliate of the Company; or

(ii)    the transfer of the business in which the Employee is employed from the Company (or any Affiliate of it) to any person which is not the Company (or an Affiliate of it).

This waiver shall apply however the change of status of the relevant company, or the transfer of the relevant business, is caused, and however compensation or damages may be claimed.

21.Clawback.

Notwithstanding any provisions in this Agreement to the contrary, the Employee hereby acknowledges and agrees that any Shares or other amounts paid or provided to the Employee pursuant to this Agreement (including any gains realized on Shares issued pursuant to this Agreement), which Shares or amounts are subject to recovery for any reason under any law, government regulation, stock exchange listing requirement, or any policy adopted by the Company from time to time, will be subject to such deductions and clawback as may be required to be made pursuant to such law, government regulation, stock exchange listing requirement, or policy as in effect from time to time.

22.Disclosures.

Nothing in this Agreement shall be construed to restrict the Employee’s ability to make a confidential disclosure of any trade secret or other confidential information, without notice to or approval by the Company, to a government official or an attorney for the sole purpose of reporting or assisting in the investigation of a suspected violation of law and the Employee shall not be held liable under this Agreement or under any federal or state trade secret law for any such disclosure.

23.Foreign Jurisdictions.

This Agreement shall be construed, interpreted and applied in such a manner as shall be necessary to comply with any legal or regulatory requirements of any jurisdiction to which the Employee is or becomes subject. The Company hereby delegates to each of the officers of the Company the authority for the interpretation of such matters, whose interpretations shall be final, binding and conclusive on the Employee and all individuals claiming any rights or benefits hereunder.

[Signature Page Follows]

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IN WITNESS WHEREOF, as of the date first above written, the Company has caused this Agreement to be executed on its behalf by a duly authorized officer and the Employee has hereunto set the Employee’s hand.

Date: [Acceptance Date]	EMPLOYEE: [Participant Name]
	[Signature]
	UNUM GROUP
	By:
		[Signature]
		[Name]
		[Title]

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EX-10.47

Exhibit 10.47

CASH INCENTIVE UNIT AGREEMENT
(Unum Group 2022 Stock Incentive Plan)

THIS AGREEMENT (this “Agreement”), dated as of [Grant Date], is entered into by and between Unum Group, a Delaware corporation (the “Company”), and [Participant Name] (the “Employee”).

W I T N E S S E T H

In consideration of the mutual promises and covenants made herein and the mutual benefits to be derived herefrom, the parties hereto agree as follows:

1.Grant, Vesting and Forfeiture of Cash Incentive Units.

(a)Grant. It is hereby acknowledged and agreed that the corporate performance requirement previously established by the Committee as a condition to funding long-term incentive awards based on [Year-1] performance has been met. Accordingly, subject to the provisions of this Agreement and to the provisions of the Unum Group 2022 Stock Incentive Plan (as the same may be amended, the “Plan”), the Company hereby grants to the Employee, as of [Grant Date] (the “Grant Date”), [Quantity Granted] Cash Incentive Units (the “Cash Incentive Units”), each of which shall be deemed a Performance Unit under the Plan, representing a right to receive $1.00. All capitalized terms used herein, to the extent not defined, shall have the meaning set forth in the Plan.

(b)Earning Cash Incentive Units/Performance Period.

(i)Earning Cash Incentive Units. Subject to Section 1(b)(ii) and 1(c) below, the Employee shall earn up to 200% of the Cash Incentive Units as determined in accordance with Schedule A on the date that the Committee certifies as to such determination (including the performance calculations described in Schedule A), which date shall be no later than two and a half months after the end of the performance period extending from January 1, [Year] to December 31, [Year+2], inclusive (the “Performance Period”).

(ii)Performance Period. Subject to the terms and conditions of this Agreement, the Cash Incentive Units earned pursuant to Section 1(b)(i) shall vest and no longer be subject to any restriction upon the expiration of the Performance Period.

(c)    Termination of Employment.

(i)    General. Upon the Employee’s Termination of Employment for any reason (other than as specified in Section 1(c)(ii) or 1(c)(iii) below) during the Performance Period, all Cash Incentive Units still subject to restriction shall be forfeited.

(ii)    Job Elimination or Requalification; Good Reason. In the event of the Employee’s Termination of Employment during the Performance Period by the Company as a result of job elimination or requalification, the Employee shall earn a number of Cash Incentive Units equal to the product of (x) the number of Cash Incentive Units determined in accordance with Section 1(b)(i) and (y) a fraction, the numerator of which is the number of full and partial months that have lapsed from the first day of the Performance Period until the date of the Termination of Employment and the denominator of which is the total number of months in the Performance Period; provided, that, in the case of the Employee’s Termination of Employment under such circumstances, the Employee does not breach the CIU Restrictions (as defined in Section 5 below) and the Employee executes and submits to the Company within 10 business days following the last day of each year following such Termination of Employment during the Restricted Period (as defined in Section 5 below) a certification in the form provided to the Employee by the Company that states that the Employee has adhered to and complied with the CIU Restrictions (the “Certification”). Such Cash Incentive Units shall be settled at such time as the Cash Incentive Units would be settled in accordance with Section 2. For the avoidance of doubt, in the event that the Employee incurs a Termination of Employment during the Performance Period by the Company as a result of job elimination or requalification and the Employee fails to comply with the CIU Restrictions or fails to execute and submit each required Certification, the Cash Incentive Units will be forfeited. The benefits and conditions (including the obligations to adhere to and comply with the CIU Restrictions and the requirement to execute and submit the Certifications) described in this Section 1(c)(ii) shall also apply upon a Termination of Employment by the Employee for Good Reason if the Company has entered into a separate written agreement with the Employee providing for payments upon a Termination of Employment for Good Reason not upon or following a Change in Control, in which case “Good Reason” shall have the meaning ascribed to such term (or a similar term) in such agreement; provided, that, if the Employee is eligible for Retirement at the time of the Employee’s Termination of Employment by the Employee for Good Reason, the vesting of such Employee’s Cash Incentive Units shall be governed by Section 1(c)(iii) below.

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(iii)    Retirement/Death/Disability; Retirement Definition. In the event of the Employee’s Termination of Employment during the Performance Period due to the Employee’s death, Disability or Retirement, the Employee shall earn a number of Cash Incentive Units equal to the number of Cash Incentive Units determined in accordance with Section 1(b)(i), assuming that the Employee had remained employed through the Performance Period; provided, that, in the case of the Employee’s Retirement or Disability, the Employee does not breach the CIU Restrictions and the Employee (or in the case of the Employee’s Disability, the Employee’s legal representative on behalf of the Employee, if applicable) executes and submits to the Company within 10 business days following the last day of each year during the Restricted Period following such Termination of Employment the Certification. Such Cash Incentive Units shall be settled at such time as the Cash Incentive Units would be settled in accordance with Section 2. For the avoidance of doubt, in the event that the Employee incurs a Termination of Employment during the Performance Period due to the Employee’s Retirement or Disability and the Employee fails to comply with the CIU Restrictions or fails to execute and submit each required Certification, the Cash Incentive Units will be forfeited. For purposes of this Agreement and notwithstanding section 1(gg) of the Plan, “Retirement” shall mean the Employee’s Termination of Employment at a time when the sum of the Employee’s age and continuous years of service equals or exceeds 65, with a minimum age of 55 and a minimum of five years of continuous service, if such Termination of Employment is approved as a “Retirement” by (1) the Committee in the case of an Employee who is subject to Section 16 of the Exchange Act, or (2) the Chief Executive Officer or Executive Vice President, People and Communications, in the case of all other individuals. Notwithstanding the foregoing or section 1(gg) of the Plan, in the event that Employee is subject to the laws of a foreign jurisdiction where the above definition would violate applicable law, “Retirement” shall mean the Employee’s Termination of Employment where the Employee ceases employment with the intention of ceasing to do any further work and on a date that has been agreed by both the Company and the Employee in writing in advance in compliance with such local legal requirements.

(iv)    Employment. For purposes of this Agreement, employment with the Company shall include employment with the Company's Affiliates and successors. Nothing in this Agreement or the Plan shall confer upon the Employee any right to continue in the employment of the Company or any of its Affiliates or interfere in any way with the right of the Company or any such Affiliates to terminate the Employee’s employment at any time.

2.Settlement of Units.

Subject to Section 7 (pertaining to the withholding of taxes), and except as otherwise provided in Section 6, as soon as practicable after the date on which the Performance Period expires and the Committee certifies as to the determination of the number of earned Cash Incentive Units, and in no event later than two and a half months after the end of the Performance Period, the Company shall deliver to the Employee or his or her personal representative a lump sum amount equal to $1.00 for each Cash Incentive Unit earned pursuant to this Agreement.

3.Nontransferability of the Cash Incentive Units.

The Cash Incentive Units shall not be transferable by the Employee by means of sale, assignment, exchange, encumbrance, pledge, hedge or otherwise; provided, however, that nothing in this Section 3 shall prevent transfers by will or by the applicable laws of descent and distribution. Any purported or attempted transfer of such Cash Incentive Units in contravention of this Section 3 shall be null and void.

4.Rights as a Stockholder.

The Employee shall not be entitled to any rights of a stockholder with respect to the Cash Incentive Units (including, without limitation, any voting or dividend rights).

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5.Confidentiality; Non-Competition; Non-Solicitation; Non-Disparagement.

(a)    The Employee acknowledges that during the course of employment or engagement with the Company and its Affiliates the Employee has received and will continue to have access and exposure to secret and proprietary information, including but not limited to information about the Company’s and its Affiliates’ business, business practices and processes, customers, and prospective customers, the value of which is derived in part from the fact that the information is not generally known to the public (“Confidential Information”). The Employee acknowledges that the Company and its Affiliates have spent significant time, effort and resources protecting the Confidential Information and that the Confidential Information has contributed to customer goodwill and is of significant competitive value to the Company and its Affiliates in the businesses in which they compete, and that the use or disclosure, even if inadvertent, of the Confidential Information to or for the benefit of a competitor would cause significant damage to the legitimate business interests of the Company and its Affiliates. Accordingly, in order to protect the legitimate business and customer goodwill interests of the Company and its Affiliates, to protect the Confidential Information against inappropriate use or disclosure, and in consideration of the grant of and the opportunity to earn the Cash Incentive Units in accordance with the provisions of this Agreement, the Employee hereby covenants and agrees to comply with the confidentiality, non-competition, non-solicitation and non-disparagement provisions set forth in this Section 5(a) (collectively, the “CIU Restrictions”). Except to the extent expressly provided otherwise below, the Employee agrees to comply with the CIU Restrictions for the period commencing on the Grant Date and extending through the later of (1) the expiration of the Performance Period, in the event of the Employee’s Termination of Employment during the Performance Period (A) by the Company as a result of job elimination or requalification, (B) by the Employee for Good Reason (if the Company has entered into a separate written agreement with the Employee providing for payments upon a Termination of Employment for Good Reason not following a Change in Control), or (C) due to the Employee’s Retirement or Disability and (2) the date that is 12 months following the Employee’s Termination of Employment for any reason (such period, the “Restricted Period”).

(i)    The Employee will use Confidential Information gained during employment or engagement with the Company or any Affiliate for the benefit of the Company only and, without the prior written consent of the Company, shall not, at any time during the Restricted Period or thereafter, directly or indirectly, divulge, reveal or communicate any Confidential Information to any person or entity whatsoever, or use any Confidential Information for the Employee’s own benefit or for the benefit of others, other than as required by law or legal process. For purposes of the foregoing, Confidential Information shall not include information that was or is available to the Employee on a non-confidential basis from a source other than the Company or becomes generally available to the public, other than as a result of disclosure by the Employee.

(ii)    The Employee shall not, at any time during the Restricted Period, without the prior written consent of the Company, directly or indirectly, own, manage, operate, join, control, or participate in the ownership, management, operation or control of, or be employed by, consult with, render services for, or be connected in any other manner with, any Competing Business, whether for compensation or otherwise. For the purposes of this Agreement, a “Competing Business” shall be any business in the United States which is engaged in the sale or provision of employee benefits or other products or services of the type offered by the Company or its Affiliates (including, without limitation, life, critical illness, income protection, disability, accident, dental, vision, hospital indemnity, and medical stop-loss insurance products, absence management services, and technological products or services provided by the Company's solutions business), unless the Employee’s primary duties and responsibilities with respect to such business are not related to the management, operation or provision of such products or services. Notwithstanding the requirements of this paragraph, the Employee shall not be prohibited from owning less than 1% of any publicly traded corporation, whether or not such corporation is deemed to be a Competing Business.

(iii)    The Employee shall not, at any time during the Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, solicit, assist, or induce any Covered Employee to terminate his or her relationship with the Company or its Affiliates (regardless of who first initiates the communication), or help another person or entity evaluate any Covered Employee as an employment candidate, or offer to employ, call on, or actively interfere with the Company’s or any Affiliate’s relationship with any Covered Employee, provided that this paragraph shall not prohibit general solicitations in the form of classified advertisements or the like in newspapers, on the internet, or in other media. For purposes of this Agreement, “Covered Employee” means an individual who is an employee, representative, or officer of the Company or any Affiliate at the time of the solicitation, assistance,or inducement or as of the date of the Employee’s Termination of Employment.

(iv)    The Employee shall not, at any time during the Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, use any Confidential Information to solicit or accept any business from any customers of the Company or any Affiliate, or any broker with regard to customers of the Company or any Affiliate (regardless of who first initiates the communication), whom the Employee serviced, solicited or had contact with while employed or engaged by the Company or any Affiliate.

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(v)    The Employee shall not, at any time during the Restricted Period, directly or indirectly, disparage or make any statement, oral or written, public or in private, which is reasonably foreseeable as harming the Company’s or any Affiliate’s business interests or impacts negatively on the Company’s or any Affiliate’s business reputation or reputation in the community. Nothing in this paragraph will be construed to prevent the Employee from (x) truthfully communicating with or responding to a request for information from a federal, state, administrative agency or court or (y) discussing or disclosing information about unlawful acts in the workplace, such as harassment or discrimination or any other conduct that the Employee has reason to believe is unlawful.

(b)    Any termination of the Employee’s employment or the termination or expiration of this Agreement shall have no effect on the continuing operation of this Section 5.

(c)    The terms and provisions of this Section 5 are intended to be separate and divisible provisions and if, for any reason, any one or more of them is held to be invalid or unenforceable, neither the validity nor the enforceability of any other provision of this Agreement shall thereby be affected. The parties hereto acknowledge that the potential restrictions on the Employee’s future employment imposed by this Section 5 are reasonable in both duration and geographic scope and in all other respects. If for any reason any court of competent jurisdiction shall find any provisions of this Section 5 unreasonable in duration or geographic scope or otherwise, the Employee and the Company agree that the restrictions and prohibitions contained herein shall be effective to the fullest extent allowed under applicable law in such jurisdiction.

(d)    The Employee acknowledges and agrees that any breach or threatened breach of the CIU Restrictions will result in substantial, continuing and irreparable injury to the Company and/or its Affiliates. Therefore, in addition to any other remedy that may be available to the Company and/or its Affiliates, the Company and/or its Affiliates shall be entitled to equitable and/or injunctive relief to prevent any breach or threatened breach of such provisions, and to specific performance of each of the terms thereof in addition to any other legal or equitable remedies that the Company or any Affiliate may have.

6.Adjustment; Change in Control.

In the event of certain transactions during the Performance Period, the Cash Incentive Units shall be subject to adjustment as provided in Section 3(d) of the Plan or any applicable successor provision under the Plan.

Notwithstanding anything in Section 1 to the contrary, subject to Section 3(d) of the Plan or any applicable successor provision under the Plan, upon the occurrence of a Change in Control, the Cash Incentive Units shall (i) be earned as determined in accordance with Schedule A (provided that, in this event, the date of the Change in Control shall be deemed the last day of the Performance Period solely for the purpose of calculating performance as set forth in Schedule A), (ii) shall remain outstanding and shall vest and be subject to restriction until the end of the Performance Period in accordance with Section 1(b)(ii), and (iii) subject to this Section 6, shall be settled by the Company as provided in Section 2. For purposes of this Agreement, Cash Incentive Units that are deemed earned upon, and remain outstanding following a Change in Control pursuant to this Section 6, shall be referred to as “Assumed CIUs”.

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Notwithstanding anything in Section 1 to the contrary, (A) upon a Termination of Employment of the Employee occurring upon or during the two years immediately following the date of a Change in Control (but prior to the settlement of the Employee’s Assumed CIUs) by reason of death, Disability or Retirement, by the Company without Cause, or by the Employee for Good Reason (as defined in the Plan, except that if the Employee is covered by a separate written plan or agreement providing for payments upon a Termination of Employment for Good Reason upon or within two years following a Change in Control, then as defined in such plan or agreement), then such Assumed CIUs shall become free of all restrictions and fully vested and shall be settled as soon as practicable following the date of Termination of Employment (but not later than 30 days thereafter); provided, however, in each case, that that any Assumed CIUs that constitute “nonqualified deferred compensation” as defined under Section 409A of the Code shall, to the extent necessary to avoid the imposition of penalty taxes under Section 409A of the Code, only be so settled if the Change in Control constitutes a “change in control event” within the meaning of Section 409A of the Code and shall otherwise only be settled on the earliest date permissible under Section 409A of the Code; (B) upon a Termination of Employment of the Employee occurring more than two years following the date of a Change in Control (but prior to the settlement of the Employee’s Assumed CIUs) by reason of death, Disability or Retirement, then such Assumed CIUs shall become free of all restrictions and fully vested and shall be settled in accordance with Section 2 hereof; and (C) upon a Termination of Employment of the Employee occurring more than two years following the date of a Change in Control (but prior to the settlement of the Employee’s Assumed CIUs) by the Company without Cause or by the Employee for Good Reason (as defined in the Plan, except that if the Employee is covered by a separate written agreement providing for payments upon a Termination of Employment for Good Reason not following a Change in Control, then as defined in such agreement), then a portion of such Employee’s Assumed CIUs, equal to the full value of the Assumed CIUs multiplied by a fraction, the numerator of which is the number of full and partial months that have lapsed from the first day of the Performance Period until the date of the Termination of Employment and the denominator of which is the total number of months in the Performance Period, shall become free of all restrictions and be vested and shall be settled in accordance with Section 2 hereof (for the avoidance of doubt, if an Employee who is eligible for Retirement incurs a Termination of Employment by the Company without Cause or by the Employee for Good Reason, the vesting of such Employee’s Assumed CIUs shall be governed by subsection (B) hereof). Nothing in this Section 6 shall preclude the Company from settling, upon a Change in Control, any Cash Incentive Units (to the extent effectuated in accordance with Treasury Reg. § 1.409A-3(j)(4) (ix)).

7.Taxes and Withholding.

No later than the date as of which an amount first becomes includible in the gross income of the Employee for federal, state, local or foreign income, employment or other tax purposes with respect to any Cash Incentive Units, the Employee shall pay to the Company, or make arrangements satisfactory to the Company regarding the payment of, federal, state, local and foreign taxes that are required by applicable laws and regulations to be withheld with respect to such amount. The obligations of the Company under this Agreement shall be conditioned on compliance by the Employee with this Section 7, and the Company shall, to the extent permitted by law, have the unilateral right to deduct any such taxes from any payment otherwise due to the Employee, including deducting such amount from cash payable upon settlement of the Cash Incentive Units that gives rise to the withholding requirement.

8.Notices.

All notices and other communications under this Agreement shall be in writing and shall be given by hand delivery to the other party or by facsimile, overnight courier, or registered or certified mail, return receipt requested, postage prepaid, addressed as follows:

If to the Employee:

At the most recent address
on file at the Company

If to the Company:

Unum Group
1 Fountain Square
Chattanooga, Tennessee 37402
Attention: Executive Compensation, Human Resources

or to such other address or facsimile number as any party shall have furnished to the other in writing in accordance with this Section 8. Notices and communications shall be effective when actually received by the addressee. Notwithstanding the foregoing, the Employee consents to electronic delivery of documents required to be delivered by the Company under the securities laws.

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9.Effect of Agreement.

This Agreement is personal to the Employee and, without the prior written consent of the Company, shall not be assignable by the Employee otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable by the Employee’s legal representatives. This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns.

10.Laws Applicable to Construction; Consent to Jurisdiction.

The interpretation, performance and enforcement of this Agreement shall be governed by the laws of the State of Delaware without reference to principles of conflict of laws, as applied to contracts executed in and performed wholly within the State of Delaware. In addition to the terms and conditions set forth in this Agreement, the Cash Incentive Units are subject to the terms and conditions of the Plan, which is hereby incorporated by reference.

11.Severability.

The invalidity or enforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement.

12.Conflicts and Interpretation.

Except with regard to the definition of “Retirement” set forth in Section 1(c)(iii) hereof, in the event of any conflict between this Agreement and the Plan, the Plan shall control. In the event of any ambiguity in this Agreement, or any matters as to which this Agreement is silent, the Plan shall govern including, without limitation, the provisions thereof pursuant to which the Committee has the power, among others, to (a) interpret the Plan, (b) prescribe, amend and rescind rules and regulations relating to the Plan, and (c) make all other determinations deemed necessary or advisable for the administration of the Plan. The Employee hereby acknowledges that a copy of the Plan has been made available to him and agrees to be bound by all the terms and provisions thereof. The Employee and the Company each acknowledge that this Agreement (together with the Plan) constitutes the entire agreement and supersedes all other agreements and understandings, both written and oral, between the parties or either of them, with respect to the subject matter hereof.

13.Amendment.

The Company may modify, amend or waive the terms of the Cash Incentive Unit award, prospectively or retroactively, but no such modification, amendment or waiver shall materially impair the rights of the Employee without his or her consent, except as required by applicable law, stock exchange rules, tax rules or accounting rules. The waiver by either party of compliance with any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by such party of a provision of this Agreement.

14.     Section 409A.

It is the intention of the Company that the Cash Incentive Units shall either (a) not constitute “nonqualified deferred compensation” as defined under Section 409A of the Code, or (b) comply in all respects with the requirements of Section 409A of the Code and the regulations promulgated thereunder, such that no settlement of or failure to settle the Cash Incentive Units pursuant to this Agreement will result in the imposition of taxation or penalties as a consequence of the application of Section 409A of the Code. Cash Incentive Units that (i) constitute “nonqualified deferred compensation” as defined under Section 409A of the Code and (ii) vest as a consequence of the Employee’s termination of employment shall not be settled until the date that the Employee incurs a “separation from service” within the meaning of Section 409A of the Code (or, if the Employee is a “specified employee” within the meaning of Section 409A of the Code and the regulations promulgated thereunder, the date that is six months following the date of such “separation from service”). If the Company determines after the Grant Date that an amendment to this Agreement is necessary to ensure the foregoing, it may make such an amendment, notwithstanding Section 13 above, effective as of the Grant Date or any later date, without the consent of the Employee.

15.Headings.

The headings of Sections herein are included solely for convenience of reference and shall not affect the meaning or interpretation of any of the provisions of this Agreement.

16.Counterparts.

This Agreement may be executed in counterparts, which together shall constitute one and the same original.

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17.Waiver and Release.

In consideration for the granting of the Cash Incentive Units, the Employee hereby waives any and all claims whether known or unknown that the Employee may have against the Company and its Subsidiaries and Affiliates and their respective directors, officers, shareholders, agents or employees arising out of, in connection with or related to the Employee’s employment, except for (1) claims under this Agreement, (2) claims that arise after the date hereof and obligations that by their terms are to be performed after the date hereof, (3) claims for compensation or benefits under any compensation or benefit plan or arrangement of the Company and its Subsidiaries and Affiliates, (4) claims for indemnification respecting acts or omissions in connection with the Employee’s service as a director, officer or employee of the Company or any of its Subsidiaries and Affiliates, (5) claims for insurance coverage under directors’ and officers’ liability insurance policies maintained by the Company or any of its Subsidiaries or Affiliates, (6) any right the Employee may have to obtain contribution in the event of the entry of judgment against the Company as a result of any act or failure to act for which both the Employee and the Company or any of its Subsidiaries or Affiliates are jointly responsible, or (7) claims under the California Fair Employment and Housing Act. The Employee waives any and all rights under the laws of any state (expressly including but not limited to Section 1542 of the California Civil Code), which is substantially similar in wording or effect as follows:

A general release does not extend to claims that the creditor or releasing party does not know or suspect to exist in his or her favor at the time of executing the Release and that, if known by him or her, would have materially affected his or her settlement with the debtor or released party.

This waiver specifically includes all claims under the Age Discrimination in Employment Act of 1967, as amended. The Employee acknowledges that the Employee (a) has been advised to consult an attorney in connection with entering into this Agreement; (b) has 21 days to consider this waiver and release; and (c) may revoke this waiver and release within seven days of execution upon written notice to Legal Counsel, Employment and Labor, Law Department, Unum Group, 1 Fountain Square, Chattanooga, Tennessee 37402. The waiver and release will not become enforceable until the expiration of the seven-day period. If the waiver and release is revoked during such seven-day period, the grant shall be void and of no further effect.

18.Confidentiality of Schedule A to this Agreement.

By executing this Agreement, the Employee acknowledges and agrees that the provisions of Schedule A to this Agreement shall be deemed confidential information (except with respect to information that becomes generally available to the public other than as a result of disclosure by the Employee, and then only to such extent), and that the Employee will keep confidential all such provisions and shall not disclose them, directly or indirectly, to any person other than the Employee’s legal advisor as necessary in obtaining legal advice (provided that such advisor is informed of the confidential nature of such provisions and is subject to confidentiality and non-disclosure duties or obligations with respect to such provisions that are no less restrictive than those contained in this Section) or as required by law or legal process.

19.Clawback.

Notwithstanding any provisions in this Agreement to the contrary, the Employee hereby acknowledges and agrees that any amounts paid or provided to the Employee pursuant to this Agreement, which amounts are subject to recovery for any reason under any law, government regulation, stock exchange listing requirement, or any policy adopted by the Company from time to time, will be subject to such deductions and clawback as may be required to be made pursuant to such law, government regulation, stock exchange listing requirement, or policy as in effect from time to time.

20.Disclosures.

Nothing in this Agreement (including Schedule A hereto) shall be construed to restrict the Employee’s ability to make a confidential disclosure of any trade secret or other confidential information, without notice to or approval by the Company, to a government official or an attorney for the sole purpose of reporting or assisting in the investigation of a suspected violation of law and the Employee shall not be held liable under this Agreement or under any federal or state trade secret law for any such disclosure.

21.Foreign Jurisdictions. This Agreement shall be construed, interpreted and applied in such a manner as shall be necessary to comply with any legal or regulatory requirements of any non-United States jurisdiction to which the Employee is or becomes subject. The Company hereby delegates to each of the officers of the Company the authority for the interpretation of such matters, whose interpretations shall be final, binding and conclusive on the Employee and all individuals claiming any rights or benefits hereunder. The following provisions shall also apply only with respect to non-U.S. employees:

(a)The Employee shall have no rights under any employment agreement (or any alleged breach of it), whether on termination of his or her employment (whether lawfully or in breach) or otherwise, to any damages for breach of contract in

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respect of the loss of any benefits or any rights (including the grant or vesting of any incentives) that he or she may have received had he or she continued to have been employed.

(b)By executing this Agreement, the Employee also agrees to, and shall be deemed to have provided to the Company, the data protection and monitoring acknowledgement set forth in Schedule 1 attached hereto.

[Signature Page Follows]

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IN WITNESS WHEREOF, as of the date first above written, the Company has caused this Agreement to be executed on its behalf by a duly authorized officer and the Employee has hereunto set the Employee’s hand.

Date: [Acceptance Date]	EMPLOYEE: [Participant Name]
	[Signature]
	UNUM GROUP
	By:
		[Signature]
		[Name]
		[Title]

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Schedule A

Subject to the terms and conditions of the Agreement, the Employee shall earn a percentage of the Cash Incentive Units up to 200%, based on the following three steps.

First, the number of Cash Incentive Units granted as provided in Section 1(a) will be multiplied by the ratio calculated by dividing (x) the Adjusted Book Value as of the end of the Performance Period (determined as of December 31, [Year+2]) by (y) the Adjusted Book Value as of the beginning of the Performance Period (determined as of December 31, [Year-1]). As used herein, “Adjusted Book Value” means, as of any date of determination, the total stockholders’ equity of the Company and its subsidiaries, as reflected on the consolidated balance sheet of the Company and its subsidiaries at such date prepared in accordance with generally accepted accounting principles, adjusted to exclude the value of accumulated other comprehensive income or loss reflected on such consolidated balance sheet; and further adjusted to exclude the impact of (i) adjustments resulting from changes in accounting policy or in legal or regulatory rules or laws; (ii) any acquisitions, divestitures or block reinsurance transactions; (iii) adjustments to the closed block of business; (iv) the effect of changes to strategic asset allocation; (v) debt issuance, repurchasing or retirement, or stock repurchase or issuance; (vi) fees or assessments, including tax assessments, from legislation enacted after the date hereof; (vii) reserve assumption updates; (viii) asset impairments, including, but not limited to, those related to premiums receivable, reinsurance recoverable, property and equipment, right-of-use assets, value of business acquired and goodwill; (ix) restructuring costs; and (x) the effect of a global pandemic or other economic or environmental pressures impacting results.

Second, the product obtained in the first step above will be multiplied by the sum of (x) 1.0 and (y) the Company’s Cumulative Dividend Yield over the Performance Period. As used herein, “Cumulative Dividend Yield” means the sum of cash dividends paid per share of the Company’s common stock over the Performance Period divided by $[ ], the closing price per share on December 31, [Year-1].

Third, the final number of Cash Incentive Units earned will be determined by multiplying the product obtained in the second step above by the TSR Factor as set forth in the chart below based on the TSR Percentile Ranking (as defined below):

TSR Percentile Ranking	TSR Factor
75% or above	1.2
62.5%	1.1
50%	1.0
42.5%	0.9
35% or below	0.8

If the TSR Percentile Ranking is in between the numbers appearing on the chart, the TSR Factor shall be calculated based on straight line interpolation, rounded to the nearest hundredth of a point, with the final number of Cash Incentive Units earned rounded to three decimal places.

For purposes of this third and final step:

“Peer Group” shall mean the following group of peer companies: [List of Peer Companies]. A company shall be removed from the Peer Group if it: (i) ceases to be a domestically domiciled publicly traded company on a national stock exchange or market system, unless such cessation of such listing is due to a low stock price or low trading volume; (ii) has gone private; (iii) has reincorporated in a foreign (e.g., non-U.S.) jurisdiction, regardless of whether it is a reporting company in that or another jurisdiction; or (iv) has been acquired by another company (whether by another company in the Peer Group or otherwise, but not including internal reorganizations) or has sold all or substantially all of its assets. A company that is removed from the Peer Group before the end of the Performance Period will be excluded from the calculation of TSR Percentile Ranking.

“Total Shareholder Return” shall mean total shareholder return as applied to the Company or any company in the Peer Group, determined by comparing the average of the applicable company’s closing stock prices over the 20 trading days immediately preceding the first day of the Performance Period with the average of the applicable company’s closing stock prices over the last 20 trading days of the Performance Period, including dividends and distributions made or, with respect to which a record date has occurred, declared (assuming such dividends or distributions are reinvested in the common stock of the Company or any company in the Peer Group) during the Performance Period.

“TSR Percentile Ranking” shall mean the relative ranking of the Company’s Total Shareholder Return as compared to the Total Shareholder Returns of the Peer Group companies, expressed as a percentile ranking.

A-1

Notwithstanding the forgoing, in no event shall more than 200% of the Cash Incentive Units granted as provided in Section 1(a) be earned under this Schedule A.

Except as provided in Section 18 or 20 of the Agreement, the provisions of this Schedule A are strictly confidential and shall not be disclosed, directly or indirectly, to any person other than the Employee’s legal advisor as necessary in obtaining legal advice (provided that such advisor is informed of the confidential nature of such information and is subject to confidentiality and non-disclosure duties or obligations with respect to such information that are no less restrictive than the provisions of Section) or as required by law or legal process.

A-2

SCHEDULE 1 (FOR NON-U.S. EMPLOYEES)

Data Protection and Monitoring Acknowledgement

To: [Name of Employer] (the “Company”)

I hereby acknowledge having been informed that the Company and Affiliates may hold and process information about me for legal, personnel, administrative and management purposes and, in particular, collecting and processing: (a) contact information to create and maintain my employee records, grant me access to internal systems, manage an internal employee directory, and communicate with me for business purposes or emergencies; (b) national identification information to ensure my eligibility to work; (c) information about the duration of sick leave to monitor sick leave and sick pay, to administer benefits and take decisions as to my fitness to work or the need for adjustments in the workplace; (d) performance and job-related information, qualifications, and professional memberships to administer performance reviews, benefits and other awards, staff restructuring, conflict of interest reporting, as well as assess my personal and professional development; (e) disciplinary, capability, and conduct information required to carry out disciplinary and grievance procedures, internal investigations and considering reports (which may be submitted anonymously) under any whistle-blowing procedure; (f) any information relating to criminal proceedings in which I have been involved to determine my suitability for certain jobs; and (g) financial, salary, and benefits information for the payment of wages and other benefits; (h) biometric information to monitor and record my hours of work where permitted by law; and (i) beneficiaries, dependents, and emergency contact information to administer benefits and contact the designated contacts in the case of emergency (my “Personal Data”).

I understand that, notwithstanding anything to the contrary herein, Company may process my Personal Data without my consent under certain lawful bases, including when processing is necessary for the performance of a contract to which I am a party; when processing is necessary for compliance with a legal requirement; or when processing is necessary to protect vital interests.

I agree that the Company may make my Personal Data available to Affiliates, those who provide products or services to the Company and Affiliates (such as advisers and payroll administrators), regulatory authorities, potential or future employers, governmental or quasi-governmental organizations, current or potential investors and potential purchasers of the Company or the business in which I work. I agree that the Company may use and make my Personal Data available to third parties to comply with obligations to third parties; establish or defend legal claims or allegations; and detect security incidents, protect against malicious deceptive, fraudulent, or illegal activity.

I understand that my Personal Data may be transferred to any Affiliate established outside the European Economic Area, and in particular to the United States. I acknowledge that these countries may not have laws in place to adequately protect my privacy, but that a Data Transfer Agreement which utilized EU Model Clauses has been implemented with such Affiliates.

I understand that all communications (whether by telephone, email or any other means) which are transmitted, undertaken or received using Company property or on Company premises will be treated by the Company as work related and are subject to occasional interception, recording and monitoring without further notice. I do not regard any such communications as private and I consent to such interception, recording and monitoring.

Interception, recording and monitoring of communications is intended to protect the Company’s business interests (for example, but without limitation, for the purposes of quality control, security of communication and IT systems, record-keeping and evidential requirements, detection and prevention of criminal activity or misconduct and to assist the Company to comply with relevant legal requirements). I acknowledge that intercepted communications may be used as evidence in any disciplinary or legal proceedings.

I understand that I have the right to withdraw my agreement to the collection and processing of Personal Data. If I would like to withdraw my agreement, I can contact the Privacy Office at privacy@unum.com or 1-877-684-1241.

I have read, understood and agreed to the above of my own free will.

EX-10.48

Exhibit 10.48

CASH INCENTIVE UNIT AGREEMENT
(Unum Group 2022 Stock Incentive Plan - Sub-plan for U.K. and Republic of Ireland)

THIS AGREEMENT (this “Agreement”), dated as of [Grant Date], is entered into by and between Unum Group, a Delaware corporation (the “Company”), and [Participant Name] (the “Employee”).

W I T N E S S E T H

In consideration of the mutual promises and covenants made herein and the mutual benefits to be derived herefrom, the parties hereto agree as follows:

1.Grant, Vesting and Forfeiture of Cash Incentive Units.

(a)Grant. It is hereby acknowledged and agreed that the corporate performance requirement previously established by the Committee as a condition to funding long-term incentive awards based on [Year-1] performance has been met. Accordingly, subject to the provisions of this Agreement and to the provisions of the Sub-plan for U.K. and Republic of Ireland (as the same may be amended, the “Sub-plan”) of the Unum Group 2022 Stock Incentive Plan (as the same may be amended, the “Plan”), the Company hereby grants to the Employee, as of [Grant Date] (the “Grant Date”), [Quantity Granted] Cash Incentive Units (the “Cash Incentive Units”), each of which shall be deemed a Performance Unit under the Plan, representing a right to receive $1.00. All capitalized terms used herein, to the extent not defined, shall have the meaning set forth in the Sub-plan and the Plan.

(b)Earning Cash Incentive Units/Performance Period.

(i)Earning Cash Incentive Units. Subject to Section 1(b)(ii) and 1(c) below, the Employee shall earn up to 200% of the Cash Incentive Units as determined in accordance with Schedule A on the date that the Committee certifies as to such determination (including the performance calculations described in Schedule A), which date shall be no later than two and a half months after the end of the performance period extending from January 1, [Year] to December 31, [Year+2], inclusive (the “Performance Period”).

(ii)Performance Period. Subject to the terms and conditions of this Agreement, the Cash Incentive Units earned pursuant to Section 1(b)(i) shall vest and no longer be subject to any restriction upon the expiration of the Performance Period.

(c)    Termination of Employment.

(i)    General. Upon the Employee’s Termination of Employment for any reason (other than as specified in Section 1(c)(ii) or 1(c)(iii) below) during the Performance Period, all Cash Incentive Units still subject to restriction shall be forfeited.

(ii)    Redundancy; Good Reason. In the event of the Employee’s Termination of Employment during the Performance Period by the Company as a result of redundancy, the Employee shall earn a number of Cash Incentive Units equal to the product of (x) the number of Cash Incentive Units determined in accordance with Section 1(b)(i) and (y) a fraction, the numerator of which is the number of full and partial months that have lapsed from the first day of the Performance Period until the date of the Termination of Employment and the denominator of which is the total number of months in the Performance Period; provided, that, in the case of the Employee’s Termination of Employment under such circumstances, the Employee does not breach the CIU Restrictions (as defined in Section 5 below) and the Employee executes and submits to the Company within 10 business days following the last day of each year following such Termination of Employment during the Restricted Period (as defined in Section 5 below) a certification in the form provided to the Employee by the Company that states that the Employee has adhered to and complied with the CIU Restrictions (the “Certification”). Such Cash Incentive Units shall be settled at such time as the Cash Incentive Units would be settled in accordance with Section 2. For the avoidance of doubt, in the event that the Employee incurs a Termination of Employment during the Performance Period by the Company as a result of redundancy and the Employee fails to comply with the CIU Restrictions or fails to execute and submit each required Certification, the Cash Incentive Units will be forfeited. The benefits and conditions (including the obligations to adhere to and comply with the CIU Restrictions and the requirement to execute and submit the Certifications) described in this Section 1(c)(ii) shall also apply upon a Termination of Employment by the Employee for Good Reason if the Company has entered into a separate written agreement with the Employee providing for payments upon a Termination of Employment for Good Reason not upon or following a Change in Control, in which case “Good Reason” shall have the meaning ascribed to such term (or a similar term) in such agreement; provided, that, if the Employee is eligible for Retirement at the time of the Employee’s Termination of Employment by the Employee for Good Reason, the vesting of such Employee’s Cash Incentive Units shall be governed by Section 1(c)(iii)

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below.

(iii)    Retirement/Death/Disability; Retirement Definition. In the event of the Employee’s Termination of Employment during the Performance Period due to the Employee’s death, Disability or Retirement, the Employee shall earn a number of Cash Incentive Units equal to the number of Cash Incentive Units determined in accordance with Section 1(b)(i), assuming that the Employee had remained employed through the Performance Period; provided, that, in the case of the Employee’s Retirement or Disability, the Employee does not breach the CIU Restrictions and the Employee (or in the case of the Employee’s Disability, the Employee’s legal representative on behalf of the Employee, if applicable) executes and submits to the Company within 10 business days following the last day of each year during the Restricted Period following such Termination of Employment the Certification. Such Cash Incentive Units shall be settled at such time as the Cash Incentive Units would be settled in accordance with Section 2. For the avoidance of doubt, in the event that the Employee incurs a Termination of Employment during the Performance Period due to the Employee’s Retirement or Disability and the Employee fails to comply with the CIU Restrictions or fails to execute and submit each required Certification, the Cash Incentive Units will be forfeited. For purposes of this Agreement and notwithstanding section 1(gg) of the Plan, “Retirement” shall mean the Employee’s Termination of Employment where the Employee ceases employment with the intention of ceasing to do any further work and on a date that has been agreed by both the Company (or Employer) and the Employee in writing in advance in compliance with the legal requirements of the jurisdiction in which the Employee is employed.

(iv)    Employment. For purposes of this Agreement, employment with the Company shall include an office or employment with the Company, its Affiliates and their successors. Nothing in this Agreement, the Sub-plan or the Plan shall confer upon the Employee any right to continue in the employment of, or holding an office with, the Company or any of its Affiliates or interfere in any way with the right of the Company or any Affiliate to terminate the Employee’s office or employment at any time.

2.Settlement of Units.

Subject to Section 7 (pertaining to the withholding of taxes), and except as otherwise provided in Section 6, as soon as practicable after the date on which the Performance Period expires and the Committee certifies as to the determination of the number of earned Cash Incentive Units, and in no event later than two and a half months after the end of the Performance Period, the Company shall deliver to the Employee or his or her personal representative a lump sum amount equal to $1.00 for each Cash Incentive Unit earned pursuant to this Agreement.

3.Nontransferability of the Cash Incentive Units.

The Cash Incentive Units shall not be transferable by the Employee by means of sale, assignment, exchange, encumbrance, pledge, hedge or otherwise; provided, however, that nothing in this Section 3 shall prevent transfers by will or by the applicable laws of descent and distribution. Any purported or attempted transfer of such Cash Incentive Units in contravention of this Section 3 shall be null and void.

4.Rights as a Stockholder.

The Employee shall not be entitled to any rights of a stockholder with respect to the Cash Incentive Units (including, without limitation, any voting or dividend rights).

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5.Confidentiality; Non-Competition; Non-Solicitation; Non-Disparagement.

(a)    The Employee acknowledges that during the course of employment or engagement with the Company and its Affiliates the Employee has received and will continue to have access and exposure to secret and proprietary information, including but not limited to information about the Company’s and its Affiliates’ business, business practices and processes, customers, and prospective customers, the value of which is derived in part from the fact that the information is not generally known to the public (“Confidential Information”). The Employee acknowledges that the Company and its Affiliates have spent significant time, effort and resources protecting the Confidential Information and that the Confidential Information has contributed to customer goodwill and is of significant competitive value to the Company and its Affiliates in the businesses in which they compete, and that the use or disclosure, even if inadvertent, of the Confidential Information to or for the benefit of a competitor would cause significant damage to the legitimate business interests of the Company and its Affiliates. Accordingly, in order to protect the legitimate business and customer goodwill interests of the Company and its Affiliates, to protect the Confidential Information against inappropriate use or disclosure, and in consideration of the grant of and the opportunity to earn the Cash Incentive Units in accordance with the provisions of this Agreement, the Employee hereby covenants and agrees to comply with the confidentiality, non-competition, non-solicitation and non-disparagement provisions set forth in this Section 5(a) (collectively, the “CIU Restrictions”). Except to the extent expressly provided otherwise below, the Employee agrees to comply with the CIU Restrictions for the period commencing on the Grant Date and extending until the date that is 12 months following the earlier of: (i) Employee’s Termination of Employment for any reason or (ii) the last day on which the Employee carried out any duties for the Company and its Affiliates (such period, the “Restricted Period”).

(i)    The Employee will use Confidential Information gained during employment or engagement with the Company or any Affiliate for the benefit of the Company only and, without the prior written consent of the Company, shall not, at any time during the Restricted Period or thereafter, directly or indirectly, divulge, reveal or communicate any Confidential Information to any person or entity whatsoever, or use any Confidential Information for the Employee’s own benefit or for the benefit of others, other than as required by law or legal process. For purposes of the foregoing, Confidential Information shall not include information that was or is available to the Employee on a non-confidential basis from a source other than the Company or becomes generally available to the public, other than as a result of disclosure by the Employee.

(ii)    The Employee shall not, at any time during the Restricted Period, without the prior written consent of the Company, directly or indirectly, own, manage, operate, join, control, or participate in the ownership, management, operation or control of, or be employed by, consult with, render services for, or be connected in any other manner with, any Competing Business, whether for compensation or otherwise. For the purposes of this Agreement, a “Competing Business” shall be any business in the United Kingdom which is engaged in the sale or provision of employee benefits or other products or services of the type offered by the Company or its Affiliates (including, without limitation, life, critical illness, income protection, disability, accident, dental, vision, hospital indemnity, and medical stop-loss insurance products, absence management services, and technological products or services provided by the Company's solutions business), unless the Employee’s primary duties and responsibilities with respect to such business are (i) not related to the management, operation or provision of such products or services or (ii) related to the management, operation or provision of such products or services in territories in which the Employee was neither involved nor concerned during the 12 months prior to the Employee’s Termination of Employment or about which he was not in possession of Confidential Information as at the date of such termination; or (iii) related to the management, operation or provision of products or services with which the Employee was neither involved nor concerned during the 12 months prior to the Employee’s Termination of Employment or about which he was not in possession of Confidential Information as at the date of such termination. Notwithstanding the requirements of this paragraph, the Employee shall not be prohibited from owning less than 1% of any publicly traded corporation, whether or not such corporation is deemed to be a Competing Business.

(iii)    The Employee shall not, at any time during the Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, solicit, assist, or induce any Covered Employee to terminate his or her relationship with the Company or its Affiliates (regardless of who first initiates the communication), or help another person or entity evaluate any Covered Employee as an employment candidate, or offer to employ, call on, or actively interfere with the Company’s or any Affiliate’s relationship with any Covered Employee, provided that this paragraph shall not prohibit general solicitations in the form of classified advertisements or the like in newspapers, on the internet, or in other media. For purposes of this Agreement, “Covered Employee” means an individual who is an employee, representative, or officer of the Company or any Affiliate at the time of the solicitation, assistance or inducement or as of the date of the Employee’s Termination of Employment and who was employed in a senior, technical, management or research capacity or who was otherwise in possession of Confidential Information and, in each case, who was supervised by or worked with the Employee during the 12 months prior to the Employee’s Termination of Employment.

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(iv)    The Employee shall not, at any time during the Restricted Period, without the prior written consent of the Company, directly or indirectly, either for the Employee’s own benefit or purpose or for the benefit or purpose of any other person or entity, use any Confidential Information to solicit or accept any business from any customers of the Company or any Affiliate, or any broker with regard to customers of the Company or any Affiliate (regardless of who first initiates the communication), whom the Employee serviced, solicited or had contact on behalf of the Company or any Affiliate during the 12 months prior to the commencement of the Restricted Period.

(v)    The Employee shall not, at any time during the Restricted Period, directly or indirectly, disparage or make any statement, oral or written, public or in private, which is reasonably foreseeable as harming the Company’s or any Affiliate’s business interests or impacts negatively on the Company’s or any Affiliate’s business reputation or reputation in the community. Nothing in this paragraph will be construed to prevent the Employee from (x) truthfully communicating with or responding to a request for information from a federal, state, administrative agency or court or (y) discussing or disclosing information about unlawful acts in the workplace, such as harassment or discrimination or any other conduct that the Employee has reason to believe is unlawful.

(b)    Any termination of the Employee’s employment or the termination or expiration of this Agreement shall have no effect on the continuing operation of this Section 5.

(c)    The terms and provisions of this Section 5 are intended to be separate and divisible provisions and if, for any reason, any one or more of them is held to be invalid or unenforceable, neither the validity nor the enforceability of any other provision of this Agreement shall thereby be affected. The parties hereto acknowledge that the potential restrictions on the Employee’s future employment imposed by this Section 5 are reasonable in both duration and geographic scope and in all other respects. If for any reason any court of competent jurisdiction shall find any provisions of this Section 5 unreasonable in duration or geographic scope or otherwise, the Employee and the Company agree that the restrictions and prohibitions contained herein shall be effective to the fullest extent allowed under applicable law in such jurisdiction.

(d)    The Employee acknowledges and agrees that any breach or threatened breach of the CIU Restrictions will result in substantial, continuing and irreparable injury to the Company and/or its Affiliates. Therefore, in addition to any other remedy that may be available to the Company and/or its Affiliates, the Company and/or its Affiliates shall be entitled to equitable and/or injunctive relief to prevent any breach or threatened breach of such provisions, and to specific performance of each of the terms thereof in addition to any other legal or equitable remedies that the Company or any Affiliate may have.

6.Adjustment; Change in Control.

In the event of certain transactions during the Performance Period, the Cash Incentive Units shall be subject to adjustment as provided in Section 3(d) of the Plan or any applicable successor provision under the Plan.

Notwithstanding anything in Section 1 to the contrary, subject to Section 3(d) of the Plan or any applicable successor provision under the Plan, upon the occurrence of a Change in Control, the Cash Incentive Units shall (i) be earned as determined in accordance with Schedule A (provided that, in this event, the date of the Change in Control shall be deemed the last day of the Performance Period solely for the purpose of calculating performance as set forth in Schedule A), (ii) shall remain outstanding and shall vest and be subject to restriction until the end of the Performance Period in accordance with Section 1(b)(ii), and (iii) subject to this Section 6, shall be settled by the Company as provided in Section 2. For purposes of this Agreement, Cash Incentive Units that are deemed earned upon, and remain outstanding following a Change in Control pursuant to this Section 6, shall be referred to as “Assumed CIUs”.

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Notwithstanding anything in Section 1 to the contrary, (A) upon a Termination of Employment of the Employee occurring upon or during the two years immediately following the date of a Change in Control (but prior to the settlement of the Employee’s Assumed CIUs) by reason of death, Disability or Retirement, by the Company without Cause, or by the Employee for Good Reason (as defined in the Plan, except that if the Employee is covered by a separate written plan or agreement providing for payments upon a Termination of Employment for Good Reason upon or within two years following a Change in Control, then as such term (or a similar term) is defined in such plan or agreement), then such Assumed CIUs shall become free of all restrictions and fully vested and shall be settled as soon as practicable following the date of Termination of Employment (but not later than 30 days thereafter); provided, however, if the Employee is a citizen of the United States or otherwise subject to U.S. Federal Income Tax in respect of the Cash Incentive Units, in each case, that that any Assumed CIUs that constitute “nonqualified deferred compensation” as defined under Section 409A of the Code shall, to the extent necessary to avoid the imposition of penalty taxes under Section 409A of the Code, only be so settled if the Change in Control constitutes a “change in control event” within the meaning of Section 409A of the Code and shall otherwise only be settled on the earliest date permissible under Section 409A of the Code; (B) upon a Termination of Employment of the Employee occurring more than two years following the date of a Change in Control (but prior to the settlement of the Employee’s Assumed CIUs) by reason of death, Disability or Retirement, then such Assumed CIUs shall become free of all restrictions and fully vested and shall be settled in accordance with Section 2 hereof; and (C) upon a Termination of Employment of the Employee occurring more than two years following the date of a Change in Control (but prior to the settlement of the Employee’s Assumed CIUs) by the Company without Cause or by the Employee for Good Reason (as defined in the Plan, except that if the Employee is covered by a separate written agreement providing for payments upon a Termination of Employment for Good Reason not following a Change in Control, then as such term (or a similar term) is defined in such agreement), then a portion of such Employee’s Assumed CIUs, equal to the full value of the Assumed CIUs multiplied by a fraction, the numerator of which is the number of full and partial months that have lapsed from the first day of the Performance Period until the date of the Termination of Employment and the denominator of which is the total number of months in the Performance Period, shall become free of all restrictions and be vested and shall be settled in accordance with Section 2 hereof (for the avoidance of doubt, if an Employee who is eligible for Retirement incurs a Termination of Employment by the Company without Cause or by the Employee for Good Reason, the vesting of such Employee’s Assumed CIUs shall be governed by subsection (B) hereof). Nothing in this Section 6 shall preclude the Company from settling, upon a Change in Control, any Cash Incentive Units (to the extent effectuated in accordance with Treasury Reg. § 1.409A-3(j)(4) (ix) if the Employee is a citizen of the United States or otherwise subject to U.S. Federal Income Tax in respect of the Cash Incentive Units).

7.Taxes and Withholding.

(a)The Employee irrevocably undertakes to:

(i)    pay to the Company, his or her employer or former employer (as appropriate) the amount of any Tax Liability; or

(ii)    enter into arrangements to the satisfaction of the Company, his or her employer or former employer (as appropriate) for payment of any Tax Liability.

(b)    The Employee irrevocably undertakes that, at the request of the Company, his or her employer or former employer, the Employee shall join that person in making a valid election to transfer to the Employee the whole or any part of the liability for employer national insurance contributions (or any similar liability for social security contribution in any jurisdiction) which:

(i)    the Company or any employer (or former employer) of the Employee may become liable to pay as a result of any Taxable Event; and

(ii)    may be lawfully transferred from the Company or any employer (or former employer) to the Employee.

(c)    The obligations of the Company under this Agreement shall be conditioned on compliance by the Employee with this Section 7, and the Company shall not deliver any cash payments in respect of the Cash Incentive Units unless and until the Employee has made arrangements satisfactory to the Committee to satisfy his or her obligations under this clause. Unless the Employee pays the Tax Liability to the Company, employer or former employer by cash or cheque, withholding may be effected, at the Company’s option, by withholding amounts payable in connection with the Cash Incentive Units. The Employee acknowledges that the Company, the employer and any former employer have the right to deduct any taxes required to be withheld by law in connection with the Cash Incentive Units from any amounts payable by it to the Employee (including, without limitation, future cash wages). The Employee’s obligations under Section 7(a) shall not be affected by any failure of the Company or employer or former employer to withhold shares or deduct from payments of remuneration under this Section 7(c).

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(d)    In this Section 7 references to “employer” and “former employer” include a company of which the Employee is a director or other officer (or any company of which the Employee was formerly a director or other officer).

8.Privacy and Data Protection.

(a)    The Employee consents to the Company, Subsidiaries and Affiliates holding and processing information about the Employee for legal, personnel, administrative and management purposes and, in particular, holding and processing: (i) health records and any medical reports to monitor sick leave and sick pay, to administer benefits and take decisions as to the Employee’s fitness to work or the need for adjustments in the workplace; (ii) information required to carry out performance reviews, disciplinary and grievance procedures, internal investigations and considering reports (which may be submitted anonymously) under any whistle-blowing procedure; (iii) any information relating to criminal proceedings in which the Employee has been involved; and (iv) to comply with legal requirements and obligations to third parties (“Personal Data”). The Employee agree that the Company may make the Personal Data available to Subsidiaries and Affiliates, those who provide products or services to the Company, Subsidiaries and Affiliates (such as advisers and payroll administrators), regulatory authorities, potential or future employers, governmental or quasi-governmental organisations, current or potential investors and potential purchasers of the Company, Subsidiaries, Affiliates or the business in which the Employee works.

(b)    The Employee consents to the transfer of Personal Data to the Company and to any Subsidiary or Affiliate established outside the European Economic Area, and in particular to the United States. The Employee acknowledges that these countries may not have laws in place to adequately protect the Employee’s privacy. The Employee confirms that he or she understands that all communications (whether by telephone, email or any other means) which are transmitted, undertaken or received using property of the Company or any Subsidiary or Affiliate or on the premises of the Company or any Subsidiary or Affiliate will be treated as work related and are subject to occasional interception, recording and monitoring without further notice. The Employee confirms that he or she does not regard any such communications as private and consents to such interception, recording and monitoring. Interception, recording and monitoring of communications is intended to protect the business interests of the Company and its Subsidiaries and Affiliates (for example, but without limitation, for the purposes of quality control, security of communication and IT systems, record-keeping and evidential requirements, detection and prevention of criminal activity or misconduct and to assist the Company and its Subsidiaries and Affiliates to comply with relevant legal requirements). The Employee acknowledges that intercepted communications may be used as evidence in any disciplinary or legal proceedings.

THE EMPLOYEE CONFIRMS THAT HE OR SHE HAS READ, UNDERSTOOD AND AGREED TO THE PROVISIONS OF THIS SECTION 8 OF HIS OR HER OWN FREE WILL.

9.Notices.

All notices and other communications under this Agreement shall be in writing and shall be given by hand delivery to the other party or by facsimile, courier, or registered airmail (postage prepaid) addressed as follows:

If to the Employee:

At the most recent address
on file at the Company

If to the Company:

Unum Group
1 Fountain Square
Chattanooga, Tennessee 37402
Attention: Executive Compensation, Human Resources

or to such other address or facsimile number as any party shall have furnished to the other in writing in accordance with this Section 9. Notices and communications shall be effective when actually received by the addressee. Notwithstanding the foregoing, the Employee consents to electronic delivery of documents required to be delivered by the Company under the securities laws.

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10.Effect of Agreement.

(a)    This Agreement is personal to the Employee and, without the prior written consent of the Company, shall not be assignable by the Employee otherwise than by will or the laws of descent and distribution. This Agreement shall inure to the benefit of and be enforceable by the Employee’s legal representatives. This Agreement shall inure to the benefit of and be binding upon the Company and its successors and assigns.

(b)    A person who is not a party to this Agreement shall not have any rights under or in connection with it, except where such rights arise as a result of this Agreement for the Company or any employer or former employer of the Employee. The rights of the Employee to surrender, terminate or rescind this Agreement, or agree any variation, waiver or settlement of it, are not subject to the consent of any other person.

11.Laws Applicable to Construction; Consent to Jurisdiction.

(a)    The interpretation, performance and enforcement of this Agreement (including non-contractual disputes or claims) shall be governed and construed by the laws of the State of Delaware without reference to principles of conflict of laws, as applied to contracts executed in and performed wholly within the State of Delaware. In addition to the terms and conditions set forth in this Agreement, the Cash Incentive Units are subject to the terms and conditions of the Plan, which is hereby incorporated by reference. The parties agree that the courts of the State of Delaware shall have non-exclusive jurisdiction to settle any dispute or claim arising out of or in connection with this deed or its subject matter or formation (including non-contractual disputes or claims).

(b)    The Parties irrevocably consent to any process in any legal action or proceedings under this Section 11 being served on it in accordance with the provisions of this Agreement relating to service of notices. Nothing contained in this Agreement shall affect the right to serve process in any other manner permitted by law.

(c)    In addition to the terms and conditions set forth in this Agreement, the Cash Incentive Units are subject to the terms and conditions of the Plan and the Sub-plan, which are hereby incorporated by reference.

12.Severability.

The invalidity or enforceability of any provision of this Agreement shall not affect the validity or enforceability of any other provision of this Agreement.

13.Conflicts and Interpretation.

In the event of any conflict between this Agreement, the Plan or the Sub-plan, the Sub-plan shall control. In the event of any ambiguity in this Agreement, or any matters as to which this Agreement is silent, the Sub-plan shall govern including, without limitation, the provisions thereof pursuant to which the Committee has the power, among others, to (a) interpret the Plan, (b) prescribe, amend and rescind rules and regulations relating to the Plan and Sub-plan, and (c) make all other determinations deemed necessary or advisable for the administration of the Plan and Sub-plan. The Employee hereby acknowledges that a copy of the Plan and the Sub-plan has been made available to him and agrees to be bound by all the terms and provisions thereof. The Employee and the Company each acknowledge that this Agreement (together with the Plan and the Sub-plan) constitutes the entire agreement and supersedes all other agreements and understandings, both written and oral, between the parties or either of them, with respect to the subject matter hereof.

14.Amendment.

The Company may modify, amend or waive the terms of the Cash Incentive Unit award, prospectively or retroactively, but no such modification, amendment or waiver shall materially impair the rights of the Employee without his or her consent, except as required by applicable law, stock exchange rules, tax rules or accounting rules. The waiver by either party of compliance with any provision of this Agreement shall not operate or be construed as a waiver of any other provision of this Agreement, or of any subsequent breach by such party of a provision of this Agreement.

15.Headings.

The headings of Sections herein are included solely for convenience of reference and shall not affect the meaning or interpretation of any of the provisions of this Agreement.

16.Counterparts.

This Agreement may be executed in counterparts, which together shall constitute one and the same original.

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17.Terms of Office or Employment.

(a)    The Employee acknowledges and undertakes that:

(i)    subject to Section 5, his or her rights and obligations as an employee or director of the Company or any of its Affiliates shall not be affected by grant of the Cash Incentive Unit award; and

(ii)    subject to Section 4, the grant of the Cash Incentive Unit award gives the Employee no right or expectation to receive and particular remuneration or future awards under the Plan and Sub-plan.

(b)    The Employee irrevocably waives any rights that may arise to compensation or damages on account of any loss in respect of the Cash Incentive Unit award where such loss arises (or is claimed to arise), in whole or in part, from:

(i)    termination of the Employee’s office or employment with; or

(ii)    notice to terminate the Employee’s office or employment given by or to, the Company, any Affiliate or former Affiliate. This waiver shall apply however termination of office or employment, or the giving of notice, is caused, and however compensation or damages may be claimed.

(c)    The Employee irrevocably waives any rights to compensation or damages that may arise on account of any loss in respect of the Cash Incentive Unit award where such loss arises (or is claimed to arise), in whole or in part, from:

(i)    any company which employs the Employee, or in which the Employee holds office, ceasing to be an Affiliate of the Company; or

(ii)    the transfer of the business in which the Employee is employed from the Company (or any Affiliate of it) to any person which is not the Company (or an Affiliate of it).

This waiver shall apply however the change of status of the relevant company, or the transfer of the relevant business, is caused, and however compensation or damages may be claimed.

18.Confidentiality of Schedule A to this Agreement.

By executing this Agreement, the Employee acknowledges and agrees that the provisions of Schedule A to this Agreement shall be deemed confidential information (except with respect to information that becomes generally available to the public other than as a result of disclosure by the Employee, and then only to such extent), and that the Employee will keep confidential all such provisions and shall not disclose them, directly or indirectly, to any person other than the Employee’s legal advisor as necessary in obtaining legal advice (provided that such advisor is informed of the confidential nature of such provisions and is subject to confidentiality and non-disclosure duties or obligations with respect to such provisions that are no less restrictive than those contained in this Section) or as required by law or legal process.

19.Clawback.

Notwithstanding any provisions in this Agreement to the contrary, the Employee hereby acknowledges and agrees that any amounts paid or provided to the Employee pursuant to this Agreement, which amounts are subject to recovery for any reason under any law, government regulation, stock exchange listing requirement, or any policy adopted by the Company from time to time, will be subject to such deductions and clawback as may be required to be made pursuant to such law, government regulation, stock exchange listing requirement, or policy as in effect from time to time.

20.Disclosures.

Nothing in this Agreement (including Schedule A hereto) shall be construed to restrict the Employee’s ability to make a confidential disclosure of any trade secret or other confidential information, without notice to or approval by the Company, to a government official or an attorney for the sole purpose of reporting or assisting in the investigation of a suspected violation of law and the Employee shall not be held liable under this Agreement or under any federal or state trade secret law for any such disclosure.

8

21.Foreign Jurisdictions.

This Agreement shall be construed, interpreted and applied in such a manner as shall be necessary to comply with any legal or regulatory requirements of any jurisdiction to which the Employee is or becomes subject. The Company hereby delegates to each of the officers of the Company the authority for the interpretation of such matters, whose interpretations shall be final, binding and conclusive on the Employee and all individuals claiming any rights or benefits hereunder.

[Signature Page Follows]

9

IN WITNESS WHEREOF, as of the date first above written, the Company has caused this Agreement to be executed on its behalf by a duly authorized officer and the Employee has hereunto set the Employee’s hand.

Date: [Acceptance Date]	EMPLOYEE: [Participant Name]
	[Signature]
	UNUM GROUP
	By:
		[Signature]
		[Name]
		[Title]

10

Schedule A

Subject to the terms and conditions of the Agreement, the Employee shall earn a percentage of the Cash Incentive Units up to 200%, based on the following three steps.

First, the number of Cash Incentive Units granted as provided in Section 1(a) will be multiplied by the ratio calculated by dividing (x) the Adjusted Book Value as of the end of the Performance Period (determined as of December 31, [Year+2]) by (y) the Adjusted Book Value as of the beginning of the Performance Period (determined as of December 31, [Year-1]). As used herein, “Adjusted Book Value” means, as of any date of determination, the total stockholders’ equity of the Company and its subsidiaries, as reflected on the consolidated balance sheet of the Company and its subsidiaries at such date prepared in accordance with generally accepted accounting principles, adjusted to exclude the value of accumulated other comprehensive income or loss reflected on such consolidated balance sheet; and further adjusted to exclude the impact of (i) adjustments resulting from changes in accounting policy or in legal or regulatory rules or laws; (ii) any acquisitions, divestitures or block reinsurance transactions; (iii) adjustments to the closed block of business; (iv) the effect of changes to strategic asset allocation; (v) debt issuance, repurchasing or retirement, or stock repurchase or issuance; (vi) fees or assessments, including tax assessments, from legislation enacted after the date hereof; (vii) reserve assumption updates; (viii) asset impairments, including, but not limited to, those related to premiums receivable, reinsurance recoverable, property and equipment, right-of-use assets, value of business acquired and goodwill; (ix) restructuring costs; and (x) the effect of a global pandemic or other economic or environmental pressures impacting results.

Second, the product obtained in the first step above will be multiplied by the sum of (x) 1.0 and (y) the Company’s Cumulative Dividend Yield over the Performance Period. As used herein, “Cumulative Dividend Yield” means the sum of cash dividends paid per share of the Company’s common stock over the Performance Period divided by $[ ], the closing price per share on December 31, [Year-1].

Third, the final number of Cash Incentive Units earned will be determined by multiplying the product obtained in the second step above by the TSR Factor as set forth in the chart below based on the TSR Percentile Ranking (as defined below):

TSR Percentile Ranking	TSR Factor
75% or above	1.2
62.5%	1.1
50%	1.0
42.5%	0.9
35% or below	0.8

If the TSR Percentile Ranking is in between the numbers appearing on the chart, the TSR Factor shall be calculated based on straight line interpolation, rounded to the nearest hundredth of a point, with the final number of Cash Incentive Units earned rounded to three decimal places.

For purposes of this third and final step:

“Peer Group” shall mean the following group of peer companies: [List of Peer Companies]. A company shall be removed from the Peer Group if it: (i) ceases to be a domestically domiciled publicly traded company on a national stock exchange or market system, unless such cessation of such listing is due to a low stock price or low trading volume; (ii) has gone private; (iii) has reincorporated in a foreign (e.g., non-U.S.) jurisdiction, regardless of whether it is a reporting company in that or another jurisdiction; or (iv) has been acquired by another company (whether by another company in the Peer Group or otherwise, but not including internal reorganizations) or has sold all or substantially all of its assets. A company that is removed from the Peer Group before the end of the Performance Period will be excluded from the calculation of TSR Percentile Ranking.

“Total Shareholder Return” shall mean total shareholder return as applied to the Company or any company in the Peer Group, determined by comparing the average of the applicable company’s closing stock prices over the 20 trading days immediately preceding the first day of the Performance Period with the average of the applicable company’s closing stock prices over the last 20 trading days of the Performance Period, including dividends and distributions made or, with respect to which a record date has occurred, declared (assuming such dividends or distributions are reinvested in the common stock of the Company or any company in the Peer Group) during the Performance Period.

“TSR Percentile Ranking” shall mean the relative ranking of the Company’s Total Shareholder Return as compared to the Total Shareholder Returns of the Peer Group companies, expressed as a percentile ranking.

A-1

Notwithstanding the forgoing, in no event shall more than 200% of the Cash Incentive Units granted as provided in Section 1(a) be earned under this Schedule A.

Except as provided in Section 18 or 20 of the Agreement, the provisions of this Schedule A are strictly confidential and shall not be disclosed, directly or indirectly, to any person other than the Employee’s legal advisor as necessary in obtaining legal advice (provided that such advisor is informed of the confidential nature of such information and is subject to confidentiality and non-disclosure duties or obligations with respect to such information that are no less restrictive than the provisions of Section) or as required by law or legal process.

A-2

EX-21

EXHIBIT 21

SUBSIDIARIES OF THE REGISTRANT

Subsidiary Name	State or Jurisdiction of Incorporation
AlwaysCare Benefits, Inc.	Louisiana
Claims Services International Limited	England and Wales
Colonial Life & Accident Insurance Company	South Carolina
Duncanson & Holt Europe Ltd.	England and Wales
Duncanson & Holt, Inc.	New York
Fairwind Insurance Company	Vermont
First Look Vision Network, L.L.C.	Missouri
First Unum Life Insurance Company	New York
H&J Capital, L.L.C.	Louisiana
LeaveLogic, Inc.	Delaware
National Dental Plan Limited	England and Wales
Provident Investment Management, LLC	Tennessee
Provident Life and Accident Insurance Company	Tennessee
Provident Life and Casualty Insurance Company	Tennessee
Starmount Life Insurance Company	Maine
Starmount Managed Dental of California, Inc. dba Unum Dental HMO Plan	California
The Paul Revere Life Insurance Company	Massachusetts
UDVAS, LLC	Delaware
Unum European Holding Company Limited	England and Wales
Unum Insurance Company	Maine
Unum Ireland Limited	Ireland
Unum Life Insurance Company of America	Maine
Unum Limited	England and Wales
Unum Select Limited	England and Wales
Unum Zycie Towarzystwo Ubezpieczen i Reasekuracji Spolka Akcyjna	Poland
UnumProvident Finance Company Limited	England and Wales

EX-23

EXHIBIT 23

CONSENT OF ERNST & YOUNG LLP,

INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM

We consent to the incorporation by reference in the following Registration Statements:

1.Registration Statement (Form S-8 No. 333-123422) of Unum Group (formerly UnumProvident Corporation) pertaining to:

a.UnumProvident Corporation Amended and Restated Employee Stock Purchase Plan

b.UnumProvident Corporation Amended and Restated Non-Employee Director Compensation Plan of 2004,

2.Registration Statement (Form S-8 No. 333-145400) of Unum Group pertaining to the Unum Group Stock Incentive Plan of 2007,

3.Registration Statement (Form S-8 No. 333-183733) of Unum Group pertaining to the Unum Group Stock Incentive Plan of 2012 and the Unum Group Stock Incentive Plan of 2017,

4.Registration Statement (Form S-8 No. 333-265246) of Unum Group pertaining to the Unum Group 2022 Stock Incentive Plan,

5.Registration Statement (Form S-8 No. 333-214501) of Unum Group pertaining to the Unum European Holding Company Limited Savings-Related Share Option Scheme of 2016,

6.Registration Statement (Form S-8 No. 333-218226) of Unum Group pertaining to the Unum Group Stock Incentive Plan of 2017,

7.Registration Statement (Form S-8 No. 333-239239) of Unum Group pertaining to the Unum European Holding Company Limited Savings-Related Share Option Scheme 2021 and the Unum Group 2020 Employee Stock Purchase Plan, and

8.Registration Statement (Form S-3 ASR No. 333-248208) of Unum Group;

of our reports dated February 23, 2023, with respect to the consolidated financial statements and schedules of Unum Group and Subsidiaries and the effectiveness of internal control over financial reporting of Unum Group and Subsidiaries included in this Annual Report (Form 10-K) for the year ended December 31, 2022.

/s/ Ernst & Young LLP

Chattanooga, Tennessee

February 23, 2023

EX-24

EXHIBIT 24

POWER OF ATTORNEY

KNOW ALL BY THESE PRESENTS, that each of the undersigned, as a director of Unum Group, a Delaware corporation (the “Company”), hereby appoints Lisa G. Iglesias and J. Paul Jullienne, each with power to act without the other and with full power of substitution and resubstitution, as his or her true and lawful attorney-in-fact and agent for him or her and in his or her name, place, and stead, in any and all capacities, to sign the Company’s Annual Report on Form 10-K for the fiscal year ended December 31, 2022, or such other form or forms as any such attorney-in-fact may deem necessary or advisable, and any and all amendments or supplements thereto, and to file the same, together with all exhibits thereto and any and all other documents in connection therewith, with the U.S. Securities and Exchange Commission pursuant to the Securities Exchange Act of 1934, as amended, and the rules or regulations thereunder, granting unto each said attorney-in-fact and agent full power and authority to do and perform each and every act and thing requisite, necessary, or desirable to be done in connection therewith, as fully and to all intents and purposes as he or she might or could do in person, hereby ratifying and confirming all that said attorneys-in-fact and agents, or any of them or their substitutes or resubstitutes, may lawfully do or cause to be done by virtue hereof.

IN WITNESS WHEREOF, the undersigned have each executed this Power of Attorney as of February 23, 2023.

/s/ Theodore H. Bunting, Jr.	/s/ Timothy F. Keaney
Theodore H. Bunting, Jr.	Timothy F. Keaney
/s/ Susan L. Cross	/s/ Gale V. King
Susan L. Cross	Gale V. King
/s/ Susan D. Devore	/s/ Gloria C. Larson
Susan D. Devore	Gloria C. Larson
/s/ Joseph J. Echevarria	/s/ Richard P. McKenney
Joseph J. Echevarria	Richard P. McKenney
/s/ Cynthia L. Egan	/s/ Ronald P. O'Hanley
Cynthia L. Egan	Ronald P. O'Hanley
/s/ Kevin T. Kabat	/s/ Francis J. Shammo
Kevin T. Kabat	Francis J. Shammo

EX-31.1

EXHIBIT 31.1

CERTIFICATION

I, Richard P. McKenney, certify that:

1. I have reviewed this annual report on Form 10-K of Unum Group;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 23, 2023	/s/ Richard P. McKenney
	Richard P. McKenney
	President and Chief Executive Officer

A signed original of this written statement required by Section 302 of the Sarbanes-Oxley Act of 2002 has been provided to Unum Group and will be retained by Unum Group and furnished to the Securities and Exchange Commission or its staff upon request.

EX-31.2

EXHIBIT 31.2

CERTIFICATION

I, Steven A. Zabel, certify that:

1. I have reviewed this annual report on Form 10-K of Unum Group;

2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3. Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations and cash flows of the registrant as of, and for, the periods presented in this report;

4. The registrant's other certifying officer and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Exchange Act Rules 13a-15(e) and 15d-15(e)) and internal control over financial reporting (as defined in Exchange Act Rules 13a-15(f) and 15d-15(f)) for the registrant and have:

(a) Designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b) Designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c) Evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of the end of the period covered by this report based on such evaluation; and

(d) Disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the registrant's most recent fiscal quarter (the registrant's fourth quarter in the case of an annual report) that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5. The registrant's other certifying officer and I have disclosed, based on our most recent evaluation of internal control over financial reporting, to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a) All significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize and report financial information; and

(b) Any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: February 23, 2023	/s/ Steven A. Zabel
	Steven A. Zabel
	Executive Vice President, Chief Financial Officer

A signed original of this written statement required by Section 302 of the Sarbanes-Oxley Act of 2002 has been provided to Unum Group and will be retained by Unum Group and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.1

EXHIBIT 32.1

STATEMENT OF CHIEF EXECUTIVE OFFICER

OF UNUM GROUP

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

§ 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Unum Group (the Company) on Form 10-K for the period ended December 31, 2022 as filed with the Securities and Exchange Commission on the date hereof (the Report), the undersigned, Richard P. McKenney, President and Chief Executive Officer of the Company, certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 23, 2023	/s/ Richard P. McKenney
	Richard P. McKenney
	President and Chief Executive Officer

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to Unum Group and will be retained by Unum Group and furnished to the Securities and Exchange Commission or its staff upon request.

EX-32.2

EXHIBIT 32.2

STATEMENT OF CHIEF FINANCIAL OFFICER

OF UNUM GROUP

PURSUANT TO 18 U.S.C. SECTION 1350,

AS ADOPTED PURSUANT TO

§ 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Unum Group (the Company) on Form 10-K for the period ended December 31, 2022 as filed with the Securities and Exchange Commission on the date hereof (the Report), the undersigned, Steven A. Zabel, Executive Vice President and Chief Financial Officer of the Company, certifies, pursuant to 18 U.S.C. § 1350, as adopted pursuant to § 906 of the Sarbanes-Oxley Act of 2002, that:

1. The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2. The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: February 23, 2023	/s/ Steven A. Zabel
	Steven A. Zabel
	Executive Vice President, Chief Financial Officer

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to Unum Group and will be retained by Unum Group and furnished to the Securities and Exchange Commission or its staff upon request.

XML

Document and Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2022	Feb. 21, 2023	Jun. 30, 2022
Entity Information [Line Items]
Document Type	10-K
Document Annual Report	true
Amendment Flag	false
Document Period End Date	Dec. 31, 2022
Document Fiscal Year Focus	2022
Current Fiscal Year End Date	--12-31
Document Fiscal Period Focus	FY
Document Transition Report	false
Entity File Number	001-11294
Entity Registrant Name	Unum Group
Entity Central Index Key	0000005513
Entity Incorporation, State or Country Code	DE
Entity Tax Identification Number	62-1598430
Entity Address, Address Line One	1 Fountain Square
Entity Address, City or Town	Chattanooga,
Entity Address, State or Province	TN
Entity Address, Postal Zip Code	37402
City Area Code	423
Local Phone Number	294-1011
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		197,294,182
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Public Float			$ 6,800,000,000
Auditor Firm ID	42
Auditor Name	Ernst & Young LLP
Auditor Location	Chattanooga, Tennessee
NEW YORK STOCK EXCHANGE, INC. | Common Class A
Entity Information [Line Items]
Title of 12(b) Security	Common stock, $0.10 par value
Trading Symbol	UNM
Security Exchange Name	NYSE
NEW YORK STOCK EXCHANGE, INC. | 6.250% Junior Subordinated Notes due 2058
Entity Information [Line Items]
Title of 12(b) Security	6.250% Junior Subordinated Notes due 2058
Trading Symbol	UNMA
Security Exchange Name	NYSE

XML

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Investments
Fixed Maturity Securities - at fair value (amortized cost of $37,825.2; $37,386.7; allowance for credit losses of $—; $—)	$ 34,840.8	$ 43,336.0
Mortgage Loans (net of allowance for credit losses of $9.3; $8.3)	2,435.4	2,560.4
Policy Loans	3,601.2	3,662.9
Other Long-term Investments	1,440.1	1,203.0
Short-term Investments	1,394.8	1,388.0
Total Investments	43,712.3	52,150.3
Other Assets
Cash and Bank Deposits	119.2	75.0
Accounts and Premiums Receivable (net of allowance for credit losses of $32.5; $34.2)	1,482.1	1,519.9
Reinsurance Recoverable (net of allowance for credit losses of $1.7; $2.3)	10,218.6	10,919.3
Accrued Investment Income	615.0	602.7
Deferred Acquisition Costs	2,252.3	2,207.9
Goodwill	347.6	352.2
Property and Equipment	451.7	462.7
Deferred Income Tax Assets, Net	449.8	0.0
Other Assets	1,786.3	1,825.6
Total Assets	61,434.9	70,115.6
Liabilities
Policy and Contract Benefits	1,839.8	1,907.7
Reserves for Future Policy and Contract Benefits	42,330.2	48,007.5
Unearned Premiums	352.7	347.5
Other Policyholders' Funds	1,750.4	1,790.9
Income Tax Payable	190.9	159.1
Deferred Income Tax	9.2	458.4
Short-term debt	2.0	0.0
Long-term Debt	3,427.8	3,442.2
Other Liabilities	2,334.4	2,585.9
Total Liabilities	52,237.4	58,699.2
Commitments and Contingent Liabilities - Note 14
Stockholders' Equity
Common Stock, $0.10 par; authorized: 725,000,000 shares; issued: 308,306,490 and 307,334,853 shares	30.8	30.7
Additional Paid-in Capital	2,441.0	2,408.1
Accumulated Other Comprehensive Income (Loss)	(2,756.6)	354.1
Retained Earnings	12,912.1	11,853.2
Treasury Stock - at cost:110,551,977 and 104,820,670 shares	(3,429.8)	(3,229.7)
Total Stockholders' Equity	9,197.5	11,416.4
Total Liabilities and Stockholders' Equity	$ 61,434.9	$ 70,115.6

XML

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Investments
Amortized Cost of Fixed Maturity Securities	$ 37,825.2	$ 37,386.7
Debt Securities, Available-for-sale, Allowance for Credit Loss for Fixed Maturity Securities	0.0	0.0
Allowance for credit losses for Mortgage Loans	9.3
Other Assets
Premium Receivable, Allowance for Credit Loss	32.5	34.2
Reinsurance Recoverable, Allowance for Credit Loss	$ 1.7	$ 2.3
Stockholders' Equity
Common Stock, Par Value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, Shares Authorized	725,000,000	725,000,000
Common Stock, Shares Issued	308,306,490	307,334,853
Treasury Stock, Shares at Cost	110,551,977	104,820,670

XML

CONSOLIDATED STATEMENTS OF INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Revenue
Premium Income	$ 9,623.4	$ 9,481.0	$ 9,378.1
Net Investment Income	2,122.2	2,213.2	2,360.7
Net Investment Gain (Loss)	(15.7)	76.7	1,199.1
Other Income	261.1	242.9	224.2
Total Revenue	11,991.0	12,013.8	13,162.1
Benefits and Expenses
Benefits and Change in Reserves for Future Benefits	6,936.7	7,598.6	8,972.9
Commissions	1,086.4	1,038.1	1,057.3
Interest and Debt Expense	188.5	185.0	188.2
Cost Related to Early Retirement of Debt	4.2	67.3	0.0
Deferral of Acquisition Costs	(556.9)	(508.1)	(576.2)
Amortization of Deferred Acquisition Costs	591.0	586.1	606.1
Compensation Expense	1,089.5	975.2	953.2
Other Expenses	1,020.2	1,008.6	996.6
Total Benefits and Expenses	10,359.6	10,950.8	12,198.1
Income Before Income Tax	1,631.4	1,063.0	964.0
Income Tax
Current	473.5	212.8	(116.6)
Deferred	(156.3)	26.0	287.6
Total Income Tax	317.2	238.8	171.0
Net Income	$ 1,314.2	$ 824.2	$ 793.0
Net Income Per Common Share
Basic	$ 6.55	$ 4.04	$ 3.89
Assuming Dilution	$ 6.50	$ 4.02	$ 3.89

XML

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Net Income	$ 1,314.2	$ 824.2	$ 793.0
Other Comprehensive Income (Loss)
Change in Net Unrealized Gain (Loss) on Securities Before Adjustment (net of tax expense (benefit) of $(1,890.8); $(346.9); $250.2)	(7,042.9)	(1,301.4)	983.0
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance (net of tax expense (benefit) of $1,100.8; $316.8; $(138.2))	4,056.9	1,195.9	(531.2)
Change in Net Gain (Loss) on Hedges (net of tax benefit of $19.2; $9.8; $23.8)	(71.4)	(36.0)	(90.0)
Change in Foreign Currency Translation Adjustment (net of tax expense (benefit) of $(0.1); $4.2; $(4.3))	(115.2)	(12.6)	20.3
Change in Unrecognized Pension and Postretirement Benefit Costs (net of tax expense (benefit) of $18.9; $42.1; $(34.8))	(61.9)	(134.0)	45.2
Total Other Comprehensive Income (Loss)	(3,110.7)	(20.1)	336.9
Comprehensive Income (Loss)	$ (1,796.5)	$ 804.1	$ 1,129.9

XML

STATEMENT OF COMPREHENSIVE INCOME (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement of Comprehensive Income [Abstract]
Change in Net Unrealized Gain on Securities Before Adjustment, Tax Expense (Benefit)	$ (1,890.8)	$ (346.9)	$ 250.2
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance, Tax Expense (Benefit)	1,100.8	316.8	(138.2)
Change in Net Gain (Loss) on Hedges, Tax Benefit	(19.2)	(9.8)	(23.8)
Other Comprehensive Income (Loss), Foreign Currency Translation, Tax Expense (Benefit)	(0.1)	4.2	(4.3)
Change in Unrecognized Pension and Postretirement Benefit Costs, Tax Expense (Benefit)	$ 18.9	$ 42.1	$ (34.8)

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total		Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Retained Earnings Cumulative Effect, Period of Adoption, Adjusted Balance	Treasury Stock
Balance at Beginning of Year at Dec. 31, 2019			$ 30.6	$ 2,348.1	$ 37.3	$ 10,728.7			$ (3,179.7)
Balance at Beginning of Year (Accounting Standards Update 2016-13) at Dec. 31, 2019							$ (18.9)	$ 10,709.8
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			0.1	28.1
Other Comprehensive Income (Loss)	$ 336.9				336.9
Net Income	793.0					793.0
Dividends to Stockholders (per common share: $1.26; $1.17; $1.14)						(233.2)
Purchases of Treasury Stock	0.0	[1]							0.0
Balance at End of Year at Dec. 31, 2020	10,871.0		30.7	2,376.2	374.2	11,269.6			(3,179.7)
Balance at End of Year (Accounting Standards Update 2016-13) at Dec. 31, 2020							0.0	11,269.6
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			0.0	31.9
Other Comprehensive Income (Loss)	(20.1)				(20.1)
Net Income	824.2					824.2
Dividends to Stockholders (per common share: $1.26; $1.17; $1.14)						(240.6)
Purchases of Treasury Stock	(50.0)	[1]							(50.0)
Balance at End of Year at Dec. 31, 2021	11,416.4		30.7	2,408.1	354.1	11,853.2			(3,229.7)
Balance at End of Year (Accounting Standards Update 2016-13) at Dec. 31, 2021							$ 0.0	$ 11,853.2
Increase (Decrease) in Stockholders' Equity
Common Stock Activity			0.1	32.9
Other Comprehensive Income (Loss)	(3,110.7)				(3,110.7)
Net Income	1,314.2					1,314.2
Dividends to Stockholders (per common share: $1.26; $1.17; $1.14)						(255.3)
Purchases of Treasury Stock	(200.1)	[1]							(200.1)
Balance at End of Year at Dec. 31, 2022	$ 9,197.5		$ 30.8	$ 2,441.0	$ (2,756.6)	$ 12,912.1			$ (3,429.8)

[1] Includes commissions of $0.1 million for the year ended December 31, 2022.

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CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY (Parenthetical) - $ / shares	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Common Stock, Dividends, Per Share, Cash Paid	$ 1.26	$ 1.17	$ 1.14

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CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Cash Flows from Operating Activities
Net Income	$ 1,314.2	$ 824.2	$ 793.0
Adjustments to Reconcile Net Income to Net Cash Provided by Operating Activities
Change in Receivables	566.0	678.0	242.9
Deferral of Acquisition Costs	34.1	78.0	29.9
Change in Insurance Reserves and Liabilities	(282.0)	74.2	1,481.8
Change in Income Taxes	(58.8)	295.3	(31.3)
Change in Other Accrued Liabilities	(113.9)	11.3	160.1
Non-cash Components of Net Investment Income	(247.0)	(254.7)	(120.5)
Net Investment (Gain) Loss	15.7	(76.7)	(1,199.1)
Depreciation	110.5	119.8	113.6
Cash Related to Reinsurance Transaction	0.0	(456.8)	(1,087.2)
Amortization of the Cost of Reinsurance	63.8	79.1	2.6
Other, Net	16.1	15.8	83.5
Net Cash Provided by Operating Activities	1,418.7	1,387.5	469.3
Cash Flows from Investing Activities
Proceeds from Sales of Fixed Maturity Securities	559.5	442.5	990.8
Proceeds from Maturities of Fixed Maturity Securities	1,532.5	2,611.4	2,052.4
Proceeds from Sales and Maturities of Other Investments	445.9	403.1	237.0
Purchase of Fixed Maturity Securities	(2,835.3)	(4,106.3)	(3,169.6)
Purchase of Other Investments	(482.9)	(606.8)	(440.6)
Net Sales (Purchases) of Short-term Investments	(22.6)	76.5	(133.1)
Net Increase (Decrease) in Payables for Collateral on Investments	(50.8)	(50.7)	314.5
Net Purchases of Property and Equipment	(102.2)	(110.3)	(119.1)
Net Cash Used by Investing Activities	(955.9)	(1,340.6)	(267.7)
Cash Flows from Financing Activities
Short-term Debt Repayment	0.0	0.0	(400.0)
Issuance of Long-term Debt	349.2	588.1	494.1
Long-term Debt Repayment	(364.0)	(500.0)	(80.0)
Cost Related to Early Retirement of Debt	3.6	62.8	0.0
Issuance of Common Stock	4.0	3.4	4.4
Repurchase of Common Stock	(200.1)	(50.0)	0.0
Dividends Paid to Stockholders	(254.2)	(239.4)	(231.9)
Proceeds from Policyholder Account Deposits	119.8	128.1	138.4
Payments for Policyholder Account Withdrawals	(72.0)	(80.7)	(74.3)
Cash Received Related to Active Life Volatility Cover Agreement	5.2	40.4	62.1
Other, Net	(2.9)	4.0	(1.5)
Net Cash Used by Financing Activities	(418.6)	(168.9)	(88.7)
Net Increase (Decrease) in Cash and Bank Deposits	44.2	(122.0)	112.9
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Beginning Balance	75.0	197.0	84.1
Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Ending Balance	$ 119.2	$ 75.0	$ 197.0

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Significant Accounting Policies

12 Months Ended

Dec. 31, 2022

Accounting policies and error corrections [Abstract]

Significant Accounting Policies

Basis of Presentation: The accompanying consolidated financial statements of Unum Group and its subsidiaries (the Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). Such accounting principles differ from statutory accounting principles (see Note 16). Intercompany transactions have been eliminated.

Description of Business: We are a leading provider of financial protection benefits in the United States, the United Kingdom, and Poland. Our products include disability, life, accident, critical illness, dental and vision, and other related services. We market our products primarily through the workplace.

We have three principal operating business segments: Unum US, Unum International, and Colonial Life. Our other reporting segments are Closed Block and Corporate. See Note 13 for further discussion of our operating segments.

Use of Estimates: The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.

In accordance with standard practice, we regularly review the methodology used in the development of all key estimates. As a result of this review, in 2022, we updated our estimate of the unearned premium reserve for certain of our product lines to utilize a gross unearned premium reserve rather than a net unearned premium reserve. The effect of this change in estimate was to decrease 2022 premium income by $13.4 million and decrease commissions by $1.0 million. This resulted in a decrease to net income of $9.8 million and a decrease to both basic and diluted earnings per share by $0.05.

Fixed Maturity Securities: Fixed maturity securities include long-term bonds and redeemable preferred stocks. Our fixed maturity securities are classified as available-for-sale and reported at fair value. Changes in the fair value of available-for-sale fixed maturity securities, except for amounts related to impairment and credit losses recognized in earnings, are reported as a component of other comprehensive income. These amounts are net of income tax and valuation adjustments to deferred acquisition costs and reserves for future policy and contract benefits which would have been recorded had the related unrealized gain or loss on these securities been realized. Realized investment gains or losses are based upon specific identification of the investments sold.

Interest income is recorded as part of net investment income when earned, using an effective yield method giving effect to amortization of premium and accretion of discount. Included within fixed maturity securities are mortgage-backed and asset-backed securities.  We recognize investment income on these securities using a constant effective yield based on projected prepayments of the underlying loans and the estimated economic life of the securities.  Actual prepayment experience is reviewed periodically, and effective yields are recalculated when differences arise between prepayments originally projected and the actual prepayments received and currently projected.  The effective yield is recalculated on a retrospective basis, and the adjustment is reflected in net investment income. For fixed maturity securities on which collection of investment income is uncertain, we discontinue the accrual of investment income and recognize investment income when interest and dividends are received. Payment terms specified for fixed maturity securities may include a prepayment penalty for unscheduled payoff of the investment.  Prepayment penalties are recognized as investment income when received.

In determining when a decline in fair value below amortized cost of a fixed maturity security is a credit loss, we evaluate available information, both positive and negative, in reaching our conclusions. In particular, we consider the strength of the issuer's balance sheet, its debt obligations and near-term funding requirements, cash flow and liquidity, the profitability of its core businesses, the availability of marketable assets which could be sold to increase liquidity, its industry fundamentals and regulatory environment, and its access to capital markets. Although all available and applicable factors are considered in our analysis, our expectation of recovering the entire amortized cost basis of the security, whether we intend to sell the security, whether it is more likely than not that we will be required to sell the security before recovery of its amortized cost, and whether the security is current on principal and interest payments are the most critical factors in determining whether impairments represent credit losses. The significance of the decline in value is also an important factor, but we generally do not record an impairment loss based solely on this factor, since often other more relevant factors will impact our evaluation of a security.

For securities with a decline in fair value below amortized cost which we intend to sell or more likely than not will be required to sell before recovery in value, the amortized cost of the investment is written down to fair value through earnings, and an impairment loss is recognized in the current period. For securities that we believe are impaired and which we do not intend to

sell and it is not more likely than not that we will be required to sell before recovery in value, we calculate an allowance for credit losses recognized in earnings which generally represents the difference between the amortized cost of the security and the present value of our best estimate of cash flows expected to be collected, discounted using the effective interest rate implicit in the security at the date of acquisition and limited by the difference between amortized cost and fair value of the security. For fixed maturity securities for which we have recognized an allowance for credit loss through earnings, if through subsequent evaluation there is a significant increase in expected cash flows, the allowance is reduced and is recognized as a reduction to credit losses in the current period. When an allowance for credit losses on a fixed maturity security is recognized, we designate non-accrual status for those securities.  We reverse all previously accrued interest through interest income and use a cash basis method for recognizing any future payments received. See Notes 2 and 3.

Mortgage Loans: Mortgage loans are generally held for investment and are carried at amortized cost less an allowance for expected credit losses. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. Prepayment penalties are recognized as investment income when received. For mortgage loans on which collection of interest income is uncertain, we discontinue the accrual of interest and recognize it in the period when an interest payment is received. We typically do not resume the accrual of interest on mortgage loans on nonaccrual status until there are significant improvements in the underlying financial condition of the borrower. We consider a loan to be delinquent if full payment is not received in accordance with the contractual terms of the loan.

We evaluate each of our mortgage loans individually for impairment and assign an internal credit quality rating based on a comprehensive rating system used to evaluate the credit risk of the loan. Although all available and applicable factors are considered in our analysis, loan-to-value and debt service coverage ratios are the most critical factors in determining impairment. We estimate an allowance for credit losses that we expect to incur over the life of our mortgage loans using a probability of default method. For each loan, we estimate the probability that the loan will default before its maturity (probability of default) and the amount of the loss if the loan defaults (loss given default). These two factors result in an expected loss percentage that is applied to the amortized cost of each loan to determine the expected credit loss. As we are the original underwriter of the mortgage loans, the amortized cost generally equals the principal amount of the loan. We measure losses on defaults of our mortgage loans as the excess amortized cost of the mortgage loan over the fair value of the underlying collateral in the event that we foreclose on the loan or over the expected future cash flows of the loan if we retain the mortgage loan until payoff. We do not purchase mortgage loans with existing credit impairments.

In estimating the probability of default, we consider historical experience, current market conditions, and reasonable and supportable forecasts about the future market conditions. We utilize our historical loan experience in combination with a large third-party industry database for a period of time that aligns with the average life of our loans based on the maturity dates of the loans and prepayment experience. Our model utilizes an industry database of the historical loss experience based on our actual portfolio characteristics such as loan-to-value, debt service coverage, collateral type, geography, and late payment history. In addition, because we actively manage our portfolio, we may extend the term of a loan in certain situations and will accordingly extend the maturity date in the estimate of probability of default. In estimating the loss given default, we primarily consider the type and value of collateral and secondarily the expected liquidation costs and time to recovery.

The primary market factors that we consider in our forecast of future market conditions are gross domestic product, unemployment rates, interest rates, inflation, commercial real estate values, household formation, and retail sales. We also forecast certain loan specific factors such as growth in the fair value and net operating income of collateral by property type. We include our estimate of these factors over a two-year period and for the remainder of the loans’ estimated lives, adjusted for estimated prepayments. Past the two-year forecast period, we revert to the historical assumptions ratably by the end of the fifth year of the loan after which we utilize only historical assumptions.

We utilize various scenarios to estimate our allowance for expected losses ranging from a base case scenario that reflects normal market conditions to a severe case scenario that reflects adverse market conditions. We will adjust our allowance each period to utilize the scenario or weighting of the scenarios that best reflects our view of current market conditions. Additions and reductions to our allowance for credit losses on mortgage loans are reported as a component of net investment gains and losses. See Note 3.

Policy Loans: Policy loans are presented at the unpaid balances directly related to policyholders. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. Included in policy loans are $3,312.5 million and $3,373.7 million of policy loans ceded to reinsurers at December 31, 2022 and 2021, respectively.

Other Long-term Investments: Other long-term investments are comprised primarily of private equity partnerships, real estate, perpetual preferred stock, common stock, and tax credit partnerships.

Our investments in private equity partnerships are passive in nature and represent funds that are primarily invested in private credit, private equity, and real assets. We account for our investments in these partnerships using either the equity method or at fair value through net income depending on the level of ownership and the degree of our influence over partnership operating and financial policies. For investments in partnerships accounted for under the equity method, we report our investments at our share of the partnership's net asset value (NAV) and record our portion of partnership earnings as a component of net investment income. For investments in partnerships accounted for at fair value through net income, we also report our investments at our share of the partnership's NAV as a practical expedient for fair value with increases or decreases recorded as a component of net investment income. Distributions received from the funds arise from income generated by the underlying investments as well as the liquidation of the underlying investments and there is generally not a public market for these investments.

Investment real estate is primarily comprised of property held for the production of income and property held for sale. Property held for the production of income is carried at cost less accumulated depreciation and any write-downs to fair value for impairment losses. Depreciation is recorded on a straight-line basis over the estimated useful life of the asset. A review for impairment is made whenever events or circumstances indicate that the carrying value may not be recoverable. An impairment loss is recognized when the carrying value of the property exceeds the expected undiscounted cash flows generated from the property, at which point the carrying value is written down to an estimated fair value. Real estate held for sale is carried at the lower of depreciated cost or fair value less estimated selling costs and is not further depreciated once classified as such.

Our perpetual preferred stocks are valued at fair value, based on quoted market prices, where available. For preferred stocks not actively traded, fair values are estimated using values obtained from independent pricing services. Our investments in common stock are valued at fair value. Our shares of Federal Home Loan Bank (FHLB) common stock are carried at cost, which approximates fair value.

Tax credit partnerships in which we have invested were formed for the purpose of investing in the construction and rehabilitation of low-income housing.  Because the partnerships are structured such that there is no return of principal, the primary sources of investment return from our tax credit partnerships are tax credits and tax benefits derived from passive losses on the investments, both of which may exhibit variability over the life of the investment.  These partnerships are accounted for using either the proportional or the effective yield method, depending primarily on whether the tax credits are guaranteed through a letter of credit, a tax indemnity agreement, or another similar arrangement. Tax credits received from these partnerships are reported in our consolidated statements of income as either a reduction of premium tax or a reduction of income tax. The amortization of the principal amount invested in these partnerships is reported as a component of either premium tax or income tax.

See Notes 2 and 3 for further discussion of our other long-term investments.

Short-term Investments: Short-term investments are carried at cost. Short-term investments include investments maturing within one year of purchase, such as corporate commercial paper and Treasury bills, bank term deposits, and other cash accounts and cash equivalents earning interest.

Cash and Bank Deposits: Cash and bank deposits include cash on hand and non-interest bearing cash and deposit accounts.

Derivative Financial Instruments: Derivative financial instruments (including certain derivative instruments embedded in other contracts) are recognized as either other long-term investments or other liabilities in our consolidated balance sheets and are reported at fair value. The accounting for a derivative depends on whether it has been designated and qualifies as part of a hedging relationship, and further, on the type of hedging relationship. To qualify for hedge accounting, at the inception of the hedging transaction, we formally document the risk management objective and strategy for undertaking the hedging transaction, as well as the designation of the hedge as either a fair value hedge or a cash flow hedge. Included in this documentation is how the hedging instrument is expected to hedge the designated risk(s) related to specific assets or liabilities on the balance sheet or

to specific forecasted transactions as well as a description of the method that will be used to retrospectively and prospectively assess the hedging instrument's effectiveness.

A derivative designated as a hedging instrument must be assessed as being highly effective in offsetting the designated risk(s) of the hedged item. Hedge effectiveness is formally assessed at inception and periodically throughout the life of the designated hedging relationship, using qualitative and quantitative methods. Qualitative methods include comparison of critical terms of the derivative to the hedged item. Quantitative methods include regression or other statistical analysis of changes in fair value or cash flows associated with the hedge relationship.

Changes in the fair value of a derivative designated as a fair value hedge and changes in the fair value of the hedged item attributable to the risk being hedged are recognized in earnings as a component of net investment gain or loss during the period of change in fair value.  For gains or losses on the derivative instrument that are excluded from the assessment of hedge effectiveness, those gains and losses are recognized in other comprehensive income or loss and amortized into earnings in the same income statement line as the related hedged item. The gain or loss on the termination of a fair value hedge is recognized in earnings as a component of net investment gain or loss during the period in which the termination occurs. When interest rate swaps are used in hedge accounting relationships, periodic settlements are recorded in the same income statement line as the related settlements of the hedged items.

Changes in the fair value of a derivative designated as a cash flow hedge are reported in other comprehensive income and reclassified into earnings and reported on the same income statement line item as the hedged item and in the same period or periods during which the hedged item affects earnings. The gain or loss on the termination of an effective cash flow hedge is reported in other comprehensive income and reclassified into earnings and reported on the same income statement line item as the hedged item and in the same period or periods during which the hedged item affects earnings.

Gains or losses on the termination of ineffective fair value or cash flow hedges are reported in earnings as a component of net investment gain or loss. In the event a hedged item is disposed of or the anticipated transaction being hedged is no longer likely to occur, we will terminate the related derivative and recognize the gain or loss on termination in current earnings as a component of net investment gain or loss. In the event a hedged item is disposed of subsequent to the termination of the hedging transaction, we reclassify any remaining gain or loss on the hedge out of accumulated other comprehensive income into earnings as a component of the same income statement line item wherein we report the gain or loss on disposition of the hedged item.

For a derivative not designated as a hedging instrument, changes in the fair value of the derivative, together with the payment of periodic fees, if applicable, are recognized in the same income statement line item as the hedged item during the period of change in fair value.

Cash flow activity from the settlement of derivative contracts is reported in the consolidated statements of cash flows as a component of proceeds from sales and maturities of other investments.

In our consolidated balance sheets, we do not offset fair value amounts recognized for derivatives executed with the same counterparty under a master netting agreement and fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral arising from those master netting agreements. See Notes 2, 3, and 4.

Fair Value Measurement: Certain assets and liabilities are reported at fair value in our consolidated balance sheets and in our notes to our consolidated financial statements. We define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Therefore, fair value represents an exit price, not an entry price. The exit price objective applies regardless of our intent and/or ability to sell the asset or transfer the liability at the measurement date. Assets or liabilities with readily available actively quoted prices or for which fair value can be measured from actively quoted prices in active markets generally have more pricing observability and less judgment utilized in measuring fair value. When actively quoted prices are not available, fair values are based on quoted prices in markets that are not active, quoted prices for similar but not identical assets or liabilities, or other observable inputs. If observable inputs are not available, unobservable inputs and/or adjustments to observable inputs requiring management judgment are used to determine fair value. We categorize our assets and liabilities measured at estimated fair value into a three-level hierarchy, based on the significance of the inputs. The fair value hierarchy gives the highest priority to inputs which are

unadjusted and represent quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). See Note 2.

Allowance for Credit Losses on Premiums Receivable: We establish an allowance for credit losses on premiums receivable, which is deducted from the gross amount of our receivable balance, to present the net amount we expect to collect on this asset. The allowance is forward-looking in nature and is calculated based on considerations regarding both historical events and future expectations. Periodic changes in the allowance are recorded through earnings.

The allowance on our premiums receivable is primarily determined using an aging analysis as well as historical lapse and delinquency rates by line of business, adjusted for key factors that may impact our future expectation of premium receipts such as changes in customer demographics, business practices, economic conditions, and product offerings. We write off premiums receivable amounts when determined to be uncollectible, which is based on various factors, including the aging of premiums receivable past the due date and specific communication with customers. At December 31, 2022 and 2021, the allowance for expected credit losses on premium receivables was $32.5 million and $34.2 million, respectively, on gross premium receivables of $557.6 million and $530.7 million, respectively. The allowance decreased $1.7 million during the year ended December 31, 2022, and was driven primarily by improvements in the age of premiums receivable. The allowance decreased $4.6 million during the year ended December 31, 2021, driven primarily by improvements in the age of premiums receivable and improvements in unemployment levels.

Deferred Acquisition Costs: Incremental direct costs associated with the successful acquisition of new or renewal insurance contracts have been deferred. Such costs include commissions, other agency compensation, certain selection and policy issue expenses, and certain field expenses. Acquisition costs that do not vary with the production of new business, such as commissions on group products which are generally level throughout the life of the policy, are excluded from deferral. Deferred acquisition costs are subject to recoverability testing at the time of policy issue and loss recognition testing in subsequent years.

Deferred acquisition costs related to non-interest sensitive policies are amortized in proportion to the premium income we expect to receive over the lives of the policies. Deferred acquisition costs related to interest sensitive policies are amortized over the lives of the policies in relation to the present value of estimated gross profits from surrender charges, mortality margins, investment returns, and expense margins. Deviations from projections result in a change to the rate of amortization in the period during which such events occur. Generally, the amortization periods for these policies approximate the estimated lives of the policies.

For certain products, policyholders can elect to modify product benefits, features, rights, or coverages by exchanging a contract for a new contract or by amendment, endorsement, or rider to a contract, or by the election of a feature or coverage within a contract. These transactions are known as internal replacement transactions. Internal replacement transactions wherein the modification does not substantially change the policy are accounted for as continuations of the replaced contracts. Unamortized deferred acquisition costs from the original policy continue to be amortized over the expected life of the new policy, and the costs of replacing the policy are accounted for as policy maintenance costs and expensed as incurred. Internal replacement transactions, principally on group contracts, that result in a policy that is substantially changed are accounted for as an extinguishment of the original policy and the issuance of a new policy. Unamortized deferred acquisition costs on the original policy that was replaced are immediately expensed, and the costs of acquiring the new policy are capitalized and amortized in accordance with our accounting policies for deferred acquisition costs.

Loss recognition and recoverability testing is performed on an annual basis, or more frequently if appropriate, using best estimate assumptions as to future experience as of the date of the test. Insurance contracts are grouped for each major product line within a segment when we perform the loss recognition and recoverability tests. If loss recognition or recoverability testing indicates that deferred acquisition costs are not recoverable, the deficiency is charged to expense.

Goodwill: Goodwill is the excess of the amount paid to acquire a business over the fair value of the net assets acquired. We review the carrying amount of goodwill for impairment on an annual basis, or more frequently if events or changes in circumstances indicate that the carrying amount might not be recoverable. Goodwill impairment testing compares the fair value of a reporting unit with its carrying amount, including goodwill.  If the fair value of the reporting unit to which the goodwill relates is less than the carrying amount of the reporting unit, an impairment charge is recognized for the amount by which the

carrying amount exceeds the fair value of the reporting unit in an amount not to exceed the total amount of goodwill allocated to the reporting unit. 

Property and Equipment: Property and equipment is reported at cost less accumulated depreciation, which is calculated on the straight-line method over the estimated useful life. The accumulated depreciation for property and equipment was $1,328.7 million and $1,259.6 million as of December 31, 2022 and 2021, respectively.

Value of Business Acquired: Value of business acquired represents the present value of future profits recorded in connection with the acquisition of a block of insurance policies. The asset is amortized based upon expected future premium income for non-interest sensitive insurance policies and estimated future gross profits from surrender charges, mortality margins, investment returns, and expense margins for interest sensitive insurance policies. The value of business acquired, which is included in other assets in our consolidated balance sheets, was $62.9 million and $73.1 million at December 31, 2022 and 2021, respectively. The accumulated amortization for value of business acquired was $150.3 million and $157.7 million as of December 31, 2022 and 2021, respectively.

The amortization of value of business acquired, which is included in other expenses in the consolidated statements of income, was $4.9 million, $5.7 million, and $6.1 million for the years ended December 31, 2022, 2021, and 2020, respectively. We periodically review the carrying amount of value of business acquired using the same methods used to evaluate deferred acquisition costs.

Policy and Contract Benefits: Policy and contract benefits represent amounts paid and expected to be paid based on reported losses and estimates of incurred but not reported losses for non-interest sensitive life and accident and health products. For interest sensitive products, benefits are the amounts paid and expected to be paid on insured claims in excess of the policyholders' policy fund balances.

Reserves for Future Policy and Contract Benefits: Policy reserves represent future policy and contract benefits for claims not yet incurred. Policy reserves for non-interest sensitive life and accident and health products are determined using the net level premium method. The reserves are calculated based upon assumptions as to interest, persistency, morbidity, and mortality that were appropriate at the date of issue. Discount rate assumptions are based on actual and expected net investment returns. Persistency assumptions are based on our actual historical experience adjusted for future expectations. Claim incidence and claim resolution rate assumptions related to morbidity and mortality are based on actual experience or industry standards adjusted as appropriate to reflect our actual experience and future expectations. The assumptions vary by plan, year of issue, and policy duration and include a provision for adverse deviation.

Policy reserves for group single premium annuities are developed on a net single premium method. The reserves are calculated based on assumptions as to interest, mortality, and retirement that were appropriate at the date of issue. Mortality assumptions are based upon industry standards adjusted as appropriate to reflect our actual experience and future expectations. The assumptions vary by year of issue.

Policy reserves for interest sensitive products are principally policyholder account values resulting from customer deposits and interest credited less cost of insurance, policy administration expenses, surrender charges, and customer withdrawals.

Policy reserves require ongoing loss recognition testing. We perform loss recognition tests on our policy reserves annually, or more frequently if appropriate, using best estimate assumptions as of the date of the test, without a provision for adverse deviation. We group the policy reserves for each major product line within a segment when we perform the loss recognition tests. If the policy reserves determined using these best estimate assumptions are higher than our existing policy reserves net of any deferred acquisition cost balance, the existing policy reserves are increased or deferred acquisition costs are reduced to immediately recognize the deficiency. This becomes the new basis for policy reserves going forward, subject to future loss recognition testing.

Claim reserves represent future policy and contract benefits for claims that have been incurred or are estimated to have been incurred but not yet reported to us. Our claim reserves relate primarily to disability and long-term care policies and are calculated based on assumptions as to interest and claim resolution rates that are currently appropriate. Claim resolution rate assumptions are based on our actual experience. The interest rate assumptions used for discounting claim reserves are based on

projected portfolio yield rates, after consideration for defaults and investment expenses, for the assets supporting the liabilities for the various product lines. Unlike policy reserves for which assumptions are generally established and locked in at the time of policy issuance, claim reserves are subject to revision as current claim experience and projections of future factors affecting claim experience change. Claim reserves do not include a provision for adverse deviation. See Note 6.

Other Policyholders' Funds: Other policyholders' funds represent customer deposits plus interest credited at contract rates. We control interest rate risk by investing in quality assets which have an aggregate duration that closely matches the expected duration of life liabilities.

Income Tax: Deferred taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial statement purposes and the amounts used for income tax purposes. Deferred taxes have been measured using enacted statutory income tax rates and laws that are currently in effect. We record adjustments to our deferred taxes resulting from tax rate changes through income as of the date of enactment. We record deferred tax assets for tax positions taken in the U.S. and other tax jurisdictions based on our assessment of whether a position is more likely than not to be sustained upon examination based solely on its technical merits.  A valuation allowance is established for deferred tax assets when it is more likely than not that an amount will not be realized. We record tax expense related to Global Intangible Low-Taxed Income in the period in which it is incurred. We follow an aggregate portfolio approach to release disproportionate tax effects from accumulated other comprehensive income upon disposal of an entire business segment's portfolio. See Note 7.

Short-term and Long-term Debt: Debt is generally carried at the unpaid principal balance, net of unamortized discount or premium and deferred debt issuance costs. Short-term debt consists of debt due within the next twelve months, including that portion of debt otherwise classified as long-term. The amortization of the original issue discount or premium as well as deferred debt issuance costs are recognized as a component of interest expense over the period the debt is expected to be outstanding. The carrying amount of long-term debt that is part of a fair value hedge program includes an adjustment to reflect the effect of the change in fair value attributable to the risk being hedged. Net interest settlements for fair value hedges on our long-term debt are recognized as a component of interest expense. See Note 8.

Right-of-Use Asset (ROU) and Lease Liability: ROU assets represent our right to use an underlying asset for a specified lease term and are included in other assets in our consolidated balance sheet. Lease liabilities represent the present value of lease payments that we are obligated to pay arising from a lease and are included in other liabilities in our consolidated balance sheet.

We determine if an arrangement is a lease at inception through a formal process that evaluates our right to control the use of an identified asset for a period of time in exchange for consideration. We account for the lease and non-lease components of our building leases separately and have elected to use the available practical expedient to account for the lease and non-lease components of our equipment leases as a single component. All of our leases are classified as operating. For each operating lease, we calculate a lease liability at commencement date based on the present value of lease payments over the lease term and a corresponding ROU asset, adjusted for lease incentives. We do not recognize right-of-use assets and lease liabilities that arise from short-term leases for any class of underlying asset.

We consider the likelihood of renewal in determining the lease terms for the calculation of the ROU asset and lease liability. As most of our leases do not provide an implicit rate of interest, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. We use the implicit rate of interest when readily determinable.

Operating lease cost is calculated on a straight-line basis over the lease term and is included in other expenses in our consolidated statements of income. We amortize the ROU asset over the lease term on a pattern determined by the difference between the straight-line lease liability expense and the accretion of the imputed interest calculated on the lease liability. See Note 15.

Treasury Stock and Retirement of Common Stock: Treasury stock is reflected as a reduction of stockholders' equity at cost. When shares are retired, the par value is removed from common stock, and the excess of the repurchase price over par is allocated between additional paid-in capital and retained earnings. See Note 10.

Revenue Recognition: Our non-interest sensitive life and accident and health products are long-duration contracts, and premium income is recognized as revenue when due from policyholders. If the contracts are experience rated, the estimated ultimate premium is recognized as revenue over the period of the contract. The estimated ultimate premium, which is revised to reflect current experience, is based on estimated claim costs, expenses, and profit margins.

For interest sensitive products, the amounts collected from policyholders are considered deposits, and only the deductions during the period for cost of insurance, policy administration, and surrenders are included in revenue. Policyholders' funds represent funds deposited by contract holders and are not included in revenue.

Fees from our leave management services and administrative-services only (ASO) business are reported as other income when services are rendered.

Reinsurance: We routinely enter into reinsurance agreements with other insurance companies to spread risk and thereby limit losses from large exposures. For each of our reinsurance agreements, we determine if the agreement provides indemnification against loss or liability relating to insurance risk in accordance with applicable accounting standards. If we determine that a reinsurance agreement does not expose the reinsurer to a reasonable possibility of a significant loss from insurance risk, we record the agreement using the deposit method of accounting.

Reinsurance activity is accounted for on a basis consistent with the terms of the reinsurance contracts and the accounting used for the original policies issued. Premium income and benefits and change in reserves for future benefits are presented in our consolidated statements of income net of reinsurance ceded. Ceded liabilities for policy and contract benefits, future policy and contract benefits, and unearned premiums are reported on a gross basis in our consolidated balance sheets, as are ceded policy loans. Our reinsurance recoverable includes the balances due from reinsurers under the terms of the reinsurance agreements for these ceded balances as well as settlement amounts currently due.

Where applicable, gains or costs recognized on reinsurance transactions are generally deferred and amortized into earnings based upon expected future premium income for non-interest sensitive insurance policies and estimated future gross profits for interest sensitive insurance policies. Gains or costs recognized on reinsurance transactions for non-interest sensitive products for which we no longer receive premiums are generally deferred and amortized into earnings based upon expected claim reserve patterns. The cost of reinsurance included in other assets in our consolidated balance sheets at December 31, 2022 and 2021 was $713.3 million and $777.1 million. The deferred gain on reinsurance included in other liabilities in our consolidated balance sheets at December 31, 2022 and 2021 was $3.1 million and $3.7 million, respectively.

Under ceded reinsurance agreements wherein we are not relieved of our legal liability to our policyholders, if the assuming reinsurer is unable to meet its obligations, we remain contingently liable. We evaluate the financial condition of reinsurers and monitor concentration of credit risk to minimize this exposure. We may also require assets in trust, letters of credit, or other acceptable collateral to support our reinsurance recoverable balances. We estimate an allowance for expected credit losses for our reinsurance recoverable balance using a probability of default approach which incorporates key inputs and assumptions regarding market factors, counterparty credit ratings, and collateral received. When calculating our allowance, we apply these market factors to the net amount of our credit exposure, which considers collateral arrangements such as letters of credit and trust accounts. We evaluate the factors used to determine our allowance on a quarterly basis to consider material changes in our assumptions and make adjustments accordingly. At December 31, 2022 and 2021, the allowance for expected credit losses on reinsurance recoverables was $1.7 million and $2.3 million, respectively. The allowance decreased $0.6 million and $9.4 million during the years ended December 31, 2022, and 2021, respectively. The decreases are primarily due to changes in the composition of the related receivable. See Note 12.

Premium Tax Expense: Premium tax expense is included in other expenses in the consolidated statements of income. For the years ended December 31, 2022, 2021, and 2020, premium tax expense was $169.3 million, $166.0 million, and $175.5 million, respectively.

Stock-Based Compensation: The cost of stock-based compensation is generally measured based on the grant-date fair value of the award. The Black-Scholes options valuation model is used for estimating the fair value of stock options, and the Monte-Carlo valuation model is used for estimating the fair value of performance units. Restricted stock units and stock success units are valued based on the fair value of common stock at the grant date. Stock-based awards are expensed over the requisite service

period, or for performance units over the requisite service period, or remaining service period, if and when it becomes probable that the performance conditions will be satisfied, with an offsetting increase to additional paid-in capital in stockholders' equity. Forfeitures of stock-based awards are recognized as they occur. See Note 11.

Earnings Per Share: We compute basic earnings per share by dividing net income by the weighted average number of common shares outstanding for the period. Earnings per share assuming dilution is computed by dividing net income by the weighted average number of shares outstanding for the period plus the shares representing the dilutive effect of stock-based awards. In computing earnings per share assuming dilution, only potential common shares resulting from stock-based awards that are dilutive (those that reduce earnings per share) are included. We use the treasury stock method to account for the effect of outstanding stock options and nonvested stock awards on the computation of earnings per share assuming dilution. See Note 10.

Translation of Foreign Currency: Revenues and expenses of our foreign operations are translated at average exchange rates. Assets and liabilities are translated at the rate of exchange on the balance sheet dates. The translation gain or loss is generally reported in accumulated other comprehensive income, net of income tax. We do not provide for deferred taxes to the extent unremitted foreign earnings are deemed permanently invested.

Accounting for Participating Individual Life Insurance: Participating policies issued by one of our subsidiaries prior to its 1986 conversion from a mutual to a stock life insurance company will remain participating as long as the policies remain in-force. A Participation Fund Account (PFA) was established for the benefit of all such individual participating life and annuity policies and contracts. The assets of the PFA provide for the benefit, dividend, and certain expense obligations of the participating individual life insurance policies and annuity contracts. The assets of the PFA were $250.2 million and $297.7 million at December 31, 2022 and 2021, respectively.

Accounting Updates Adopted in 2022:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity	The amendments in this update simplified the accounting for convertible instruments by removing certain separation models in the guidance related to convertible instruments and expanded related disclosure requirements. The amendments also revised the requirements for a contract or embedded derivative that is potentially settled in an entity's own stock to be classified as equity and also amended certain guidance related to the computations of earnings per share for convertible instruments and contracts in an entity's own stock. This guidance was applied in the period of adoption.	January 1, 2022	The adoption of this update did not have an effect on our financial position or results of operations, and did not expand our disclosures.

Accounting Updates Adopted in 2021:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes	The amendments in this update simplified the accounting for income taxes by removing certain exceptions in the guidance related to the following: 1. losses in continuing operations when there is income in other items, 2. foreign subsidiaries becoming equity method investments and vice versa, and 3. year-to-date interim period losses exceeding anticipated loss for the year. The amendments also simplified the accounting for income taxes related to the following: 1. franchise taxes partially based on income, 2. step up in the tax basis of goodwill, 3. allocation of tax expense to entities not subject to tax, 4. enacted changes in tax law or rates in interim periods, and 5. employee stock ownership programs and investments in qualified affordable housing projects accounted for using the equity method.	January 1, 2021	The adoption of this update did not have a material effect on our financial position or results of operations.

Accounting Updates Adopted in 2020:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment	This update eliminated the requirement to calculate the implied fair value of goodwill (the second step in the former two-step test) to measure a goodwill impairment charge. Instead, entities should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the excess of the carrying amount over the fair value, with the loss not to exceed the total amount of goodwill allocated to that reporting unit. This guidance was applied in the period of adoption.	January 1, 2020	The adoption of this update did not have an effect on our financial position or results of operations.
ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement	This update amended the fair value measurement guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removed certain disclosures related to Level 1 and Level 2 transfers and removed the discussion regarding valuation processes of Level 3 fair value measurements. The update modified guidance related to investments in certain entities that calculate net asset value to explicitly require disclosure regarding timing of liquidation of the investee's assets and timing of redemption restrictions. The update added disclosures around the changes in unrealized gains and losses in other comprehensive income for recurring Level 3 investments held at the end of the reporting period and adds disclosures regarding certain unobservable inputs on Level 3 fair value measurements. The guidance was applied both retrospectively and prospectively, depending on the specific requirement of the update.	December 31, 2018 for the removal and modification of certain disclosures and January 1, 2020 for the addition of certain disclosures.	The adoption of this update modified our disclosures but did not have an impact on our financial position or results of operations.

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans	This update amends the defined benefit pension and other postretirement benefit guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removes the requirement to disclose the effects of a one-percentage point change in the assumed healthcare cost trend and the requirement to disclose amounts in accumulated other comprehensive income expected to be recognized as part of net periodic benefit cost of the next year. This update adds a requirement to describe the reasons for significant gains and losses related to changes in the benefit obligation for the period. The update also clarifies that the projected benefit obligation (PBO) and accumulated benefit obligation (ABO) and fair value of plan assets are to be disclosed for plans with PBOs or ABOs in excess of plan assets. The guidance was applied retrospectively.	December 31, 2020	The adoption of this update modified our disclosures but did not have an impact on our financial position or results of operations.
ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses	This update amended the guidance on the impairment of financial instruments. The update added an impairment model known as the current expected credit loss model that is based on expected losses rather than incurred losses and will generally result in earlier recognition of allowances for losses. The current expected credit loss model applies to financial instruments such as mortgage loans, fixed maturity securities classified as held-to-maturity, and certain receivables. The update also modified the other-than-temporary impairment model used for available-for-sale fixed maturity securities such that credit losses are recognized as an allowance rather than as a reduction in the amortized cost of the security. The reversal of previously recognized credit losses on available-for-sale fixed maturity securities is allowed under specified circumstances. Additional disclosures are also required, including information used to develop the allowance for losses. The guidance was applied using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. For available-for-sale fixed maturity securities, the update was applied prospectively. Other-than-temporary impairment losses recognized on available-for-sale fixed maturity securities prior to adoption of the update cannot be reversed. This guidance was applied in the period of adoption.	January 1, 2020	The adoption of this update resulted in a cumulative-effect reduction to retained earnings of $18.9 million with a corresponding decrease to mortgage loans of $8.3 million, a decrease to accounts and premiums receivable of $13.5 million and a decrease to deferred income tax of $5.0 million. There were also immaterial impacts to reinsurance recoverable and other liabilities.

Accounting Updates Outstanding:

ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and related amendments

The amendments in this update provide optional guidance, for a limited period of time, to ease the potential burden in accounting for and recognizing the effects of reference rate reform on financial reporting. The guidance allows for various practical expedients and exceptions when applying GAAP to contracts, hedging relationships, and other transactions affected either by discontinued rates as a direct result of reference rate reform or a market-wide change in interest rates used for discounting, margining or contract price alignment, if certain criteria are met. Specifically, the guidance provides certain practical expedients for contract modifications, fair value hedges, and cash flow hedges, and also provides certain exceptions related to changes in the critical terms of a hedging relationship. The guidance also allows for a one-time election to sell or transfer debt securities that were both classified as held-to-maturity prior to January 1, 2020 and reference a rate affected by the reform.

The adoption of this update is permitted as of the beginning of the interim period that includes March 12, 2020 (the issuance date of the update), or any date thereafter, through December 31, 2024, at which point the guidance will sunset. We do not anticipate needing to adopt this guidance, but we will continue to monitor our contracts and hedging relationships throughout the adoption period.

ASU 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts and related amendments

This update significantly amends the accounting and disclosure requirements for long-duration insurance contracts. These changes include a requirement to review, and if necessary, update cash flow assumptions used to measure the liability for future policy benefits for traditional and limited-payment contracts at least annually, with changes recognized in earnings. In addition, an entity will be required to update the discount rate assumption at each reporting date using a yield that is reflective of an upper-medium grade fixed-income instrument, with changes recognized in other comprehensive income (loss) (OCI). These changes result in the elimination of the provision for risk of adverse deviation and premium deficiency (or loss recognition) testing. The update also requires that an entity measure all market risk benefits associated with deposit contracts at fair value, with changes recognized in earnings except for the portion attributable to a change in the instrument-specific credit risk, which is to be recognized in OCI. This update also simplifies the amortization of deferred acquisition costs by requiring amortization on a constant level basis over the expected term of the related contracts. Deferred acquisition costs are required to be written off for unexpected contract terminations but are no longer subject to an impairment test. Significant additional disclosures will also be required, which include disaggregated rollforwards of certain liability balances and the disclosure of qualitative and quantitative information about expected cash flows, estimates, and assumptions. The application of this guidance will vary based upon the specific requirements of the update but will generally result in either a modified retrospective or full retrospective approach with changes applied as of the beginning of the earliest period presented. Early adoption is permitted. The update is effective for periods beginning January 1, 2023.

We will adopt this update effective January 1, 2023 using the modified retrospective approach with changes applied as of the beginning of the earliest period presented or January 1, 2021, also referred to as the transition date. We are continuing to evaluate the effects of implementing this update. The most significant impact at the transition date will be the requirement to update the discount rate assumption to reflect an upper-medium grade fixed-income instrument, which will be generally equivalent to a single-A interest rate matched to the duration of our insurance liabilities and will result in a decrease to accumulated other comprehensive income (loss) (AOCI) within our total stockholders’ equity balance. After the transition date, we will be required to update the discount rate each subsequent reporting period with changes recorded in OCI and expect that this could have a material impact on OCI.

Our modified retrospective adoption of this update during the first quarter of 2023 will result in a decrease to AOCI as of the transition date, January 1, 2021, of approximately $6.7 billion. We expect a decrease to AOCI at December 31, 2021 in a range from approximately $5.4 billion to $5.6 billion. We expect a decrease to AOCI at December 31, 2022 in a range from approximately $0.6 billion to $0.8 billion.

The decrease in AOCI in our recast of 2021 and 2022 is driven primarily by the difference between the discount rate applied under current GAAP, which is based on an expected investment yield from our current investment strategy, and the single-A discount rate that will be required as a part of the update. The most significant impact relates to our longest duration products. Our investment strategy reflects the illiquid nature of the majority of our liability cash flows and, as a result, the yields in our investment portfolios supporting the cash outflows required for these products are generally higher than a single-A yield. In addition, the discount rates currently applied to reserves for our longest duration products, such as long-term care, include an assumption for long-term yields rising to more historical levels.

Our modified retrospective adoption is expected to result in an increase to net income during 2021 and 2022. We expect the increase in 2021 net income to be between approximately $145 million and $175 million, or between $0.70 and $0.85 per diluted per common share. We expect the increase in 2022 net income to be between approximately $80 million and $110 million, or $0.40 and $0.55 per diluted common share.

The net favorable impact of the recast of our net income for 2021 and 2022 shown above is due primarily to the following changes:

•Updating the lifetime cohort net premium ratios (lifetime loss ratio) for actual experience each reporting period will generally cause earnings patterns to be more consistent from period to period, with variances in experience reflected in earnings over the cohort lifetime. This will result in an unfavorable impact to income for 2021 and 2022.

•Alignment of amortization of deferred acquisition costs to a constant level basis and modification of amortization periods to reflect the expected term of the related contracts could result in either higher or lower income for the affected product lines. This will result in a net favorable impact to income for 2021 and 2022.

•Accelerated recognition of the provision for adverse deviation or other differences from current best estimate values for policies issued prior to the transition date and due to not establishing the provision for policies issued on or after the transition date will generally result in higher income most notably in the initial years after the transition date. This will result in a favorable impact to income for 2021 and 2022.

•Establishing reserves for claims incurred on or after the transition date at interest rates prescribed by the update could result in either higher or lower income for the affected product lines depending on the policy issue date and the interest rate environment at that time. This will result in an unfavorable impact to income for 2021 and a favorable impact to income for 2022.

•Updating cash flow assumptions could result in either higher or lower income. This will result in a favorable impact to income for 2021 and 2022.

•Applying non-contemporaneous reinsurance accounting to the second phase of our Closed Block individual disability reinsurance transaction which was completed in the first quarter of 2021. The primary impacts of this change are:

◦Reversing the increase in benefits and change in reserves for future benefits resulting from the realization of previously unrealized investment gains and losses previously recorded in AOCI that will be removed as of the transition date which will have a favorable impact on income for 2021.

◦Remeasuring the ceded reserves as a separate cohort of reserves at interest rates prescribed by the update and the resulting change to the cost of reinsurance. The differential in the discount rate applied to the direct and ceded cohorts of business will result in an unfavorable impact to income for 2021 and 2022 partially offset by a decrease in the amortization of the cost of reinsurance as a result of a lower cost of reinsurance.

We do not have products with market risk benefits. This update will also significantly expand our disclosures.

ASU 2022-02, Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures

The amendments in this update eliminate the troubled debt restructuring recognition and measurement guidance and instead require that an entity evaluate whether the modification represents a new loan or the continuation of an existing loan. The amendments also enhance the disclosure requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. In addition, the amendments in this update require that an entity disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases. The amendments in this update should be applied prospectively, except for the transition method related to the recognition and measurement of troubled debt restructurings, for which an entity has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption.

This update is effective for periods beginning January 1, 2023, and we do not anticipate that the adoption of this update will have an effect on our financial position or results of operations but will expand our disclosures.

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Fair Values of Financial Instruments

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Fair Values of Financial Instruments

Fair Value Measurements for Financial Instruments Carried at Fair Value

We report fixed maturity securities, which are classified as available-for-sale securities, derivative financial instruments, and unrestricted equity securities at fair value in our consolidated balance sheets. We report our investments in private equity partnerships at our share of the partnerships' NAV per share or its equivalent as a practical expedient for fair value. See Note 1.

The degree of judgment utilized in measuring the fair value of financial instruments generally correlates to the level of pricing observability. Financial instruments with readily available active quoted prices or for which fair value can be measured from actively quoted prices in active markets generally have more pricing observability and less judgment utilized in measuring fair value. An active market for a financial instrument is a market in which transactions for an asset or a similar asset occur with sufficient frequency and volume to provide pricing information on an ongoing basis. A quoted price in an active market provides the most reliable evidence of fair value and should be used to measure fair value whenever available. Conversely, financial instruments rarely traded or not quoted have less observability and are measured at fair value using valuation techniques that require more judgment. Pricing observability is generally impacted by a number of factors, including the type of financial instrument, whether the financial instrument is new to the market and not yet established, the characteristics specific to the transaction, and overall market conditions.

We classify financial instruments in accordance with a fair value hierarchy consisting of three levels based on the observability of valuation inputs:

•Level 1 - the highest category of the fair value hierarchy classification wherein inputs are unadjusted and represent quoted prices in active markets for identical assets or liabilities at the measurement date.

•Level 2 - valued using inputs (other than prices included in Level 1) that are either directly or indirectly observable for the asset or liability through correlation with market data at the measurement date and for the duration of the instrument's anticipated life.

•Level 3 - the lowest category of the fair value hierarchy and reflects the judgment of management regarding what market participants would use in pricing assets or liabilities at the measurement date. Financial assets and liabilities categorized as Level 3 are generally those that are valued using unobservable inputs to extrapolate an estimated fair value.

Valuation Methodologies of Financial Instruments Measured at Fair Value

Valuation techniques used for assets and liabilities accounted for at fair value are generally categorized into three types. The market approach uses prices and other relevant information from market transactions involving identical or comparable assets or liabilities. The income approach converts future amounts, such as cash flows or earnings, to a single present amount, or a

discounted amount. The cost approach is based upon the amount that currently would be required to replace the service capacity of an asset, or the current replacement cost.

We use valuation techniques that are appropriate in the circumstances and for which sufficient data are available that can be obtained without undue cost and effort. In some cases, a single valuation technique will be appropriate (for example, when valuing an asset or liability using quoted prices in an active market for identical assets or liabilities). In other cases, multiple valuation techniques will be appropriate. If we use multiple valuation techniques to measure fair value, we evaluate and weigh the results, as appropriate, considering the reasonableness of the range indicated by those results. A fair value measurement is the point within that range that is most representative of fair value in the circumstances.

The selection of the valuation method(s) to apply considers the definition of an exit price and depends on the nature of the asset or liability being valued. For assets and liabilities accounted for at fair value, we generally use valuation techniques consistent with the market approach, and to a lesser extent, the income approach. We believe the market approach provides more observable data than the income approach, considering the type of investments we hold. Our fair value measurements could differ significantly based on the valuation technique and available inputs. When using a pricing service, we obtain the vendor's pricing documentation to ensure we understand their methodologies. We periodically review and approve the selection of our pricing vendors to ensure we are in agreement with their current methodologies. When markets are less active, brokers may rely more on models with inputs based on the information available only to the broker. Our internal investment management professionals, which include portfolio managers and analysts, monitor securities priced by brokers and evaluate their prices for reasonableness based on benchmarking to available primary and secondary market information. In weighing a broker quote as an input to fair value, we place less reliance on quotes that do not reflect the result of market transactions. We also consider the nature of the quote, particularly whether it is a bid or market quote. If prices in an inactive market do not reflect current prices for the same or similar assets, adjustments may be necessary to arrive at fair value. When relevant market data is unavailable, which may be the case during periods of market uncertainty, the income approach can, in suitable circumstances, provide a more appropriate fair value. During 2022, we have applied valuation approaches and techniques on a consistent basis to similar assets and liabilities and consistent with those approaches and techniques used at year end 2021.

Fixed Maturity and Equity Securities

We use observable and unobservable inputs in measuring the fair value of our fixed maturity and equity securities. For securities categorized as Level 1, fair values equal active Trade Reporting and Compliance Engine (TRACE) pricing or unadjusted market maker prices. For securities categorized as Level 2 or Level 3, inputs that may be used in valuing each class of securities at any given time period are disclosed below. Actual inputs used to determine fair values will vary for each reporting period depending on the availability of inputs which may, at times, be affected by the lack of market liquidity.

		Level 2	Level 3
Instrument		Observable Inputs	Unobservable Inputs
United States Government and Government Agencies and Authorities
	Valuation Method	Principally the market approach	Not applicable
	Valuation Techniques / Inputs	Prices obtained from external pricing services
States, Municipalities, and Political Subdivisions
	Valuation Method	Principally the market approach	Principally the market approach
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Analysis of similar bonds, adjusted for comparability
		Relevant reports issued by analysts and rating agencies
		Audited financial statements

		Level 2	Level 3
Instrument		Observable Inputs	Unobservable Inputs
Foreign Governments
	Valuation Method	Principally the market approach	Principally the market approach
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Analysis of similar bonds, adjusted for comparability
		Non-binding broker quotes
		Call provisions
Public Utilities
	Valuation Method	Principally the market and income approaches	Principally the market and income approaches
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Change in benchmark reference
Public Utilities - Continued
		Non-binding broker quotes	Analysis of similar bonds, adjusted for comparability
		Benchmark yields	Discount for size - illiquidity
		Transactional data for new issuances and secondary trades	Volatility of credit
		Security cash flows and structures	Lack of marketability
		Recent issuance / supply
		Audited financial statements
		Security and issuer level spreads
		Security creditor ratings/maturity/capital structure/optionality
		Public covenants
		Comparative bond analysis
		Relevant reports issued by analysts and rating agencies
Mortgage/Asset-Backed Securities
	Valuation Method	Principally the market and income approaches	Principally the market approach
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Analysis of similar bonds, adjusted for comparability
		Non-binding broker quotes	Prices obtained from external pricing services
		Security cash flows and structures
		Underlying collateral
		Prepayment speeds/loan performance/delinquencies
		Relevant reports issued by analysts and rating agencies
		Audited financial statements

		Level 2	Level 3
Instrument		Observable Inputs	Unobservable Inputs
All Other Corporate Bonds
	Valuation Method	Principally the market and income approaches	Principally the market and income approaches
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Change in benchmark reference
		Non-binding broker quotes	Discount for size - illiquidity
		Benchmark yields	Volatility of credit
		Transactional data for new issuances and secondary trades	Lack of marketability
		Security cash flows and structures	Prices obtained from external pricing services
		Recent issuance / supply
		Security and issuer level spreads
		Security creditor ratings/maturity/capital structure/optionality
All Other Corporate Bonds - Continued
		Public covenants
		Comparative bond analysis
		Relevant reports issued by analysts and rating agencies
		Audited financial statements
Redeemable Preferred Stocks
	Valuation Method	Principally the market approach	Principally the market approach
	Valuation Techniques / Inputs	Non-binding broker quotes	Financial statement analysis
		Benchmark yields
		Comparative bond analysis
		Call provisions
		Relevant reports issued by analysts and rating agencies
		Audited financial statements
Perpetual Preferred and Equity Securities
	Valuation Method	Principally the market approach	Principally the market and income approaches
	Valuation Techniques / Inputs	Prices obtained from external pricing services	Financial statement analysis
		Non-binding broker quotes

The management of our investment portfolio includes establishing pricing policy and reviewing the reasonableness of sources and inputs used in developing pricing. We review all prices that vary between multiple pricing vendors by a threshold that is outside a normal market range for the asset type.  In the event we receive a vendor's market price that does not appear reasonable based on our market analysis, we may challenge the price and request further information about the assumptions and

methodologies used by the vendor to price the security. We may change the vendor price based on a better data source such as an actual trade. We also review all prices that did not change from the prior month to ensure that these prices are within our expectations. The overall valuation process for determining fair values may include adjustments to valuations obtained from our pricing sources when they do not represent a valid exit price. These adjustments may be made when, in our judgment and considering our knowledge of the financial conditions and industry in which the issuer operates, certain features of the financial instrument require that an adjustment be made to the value originally obtained from our pricing sources. These features may include the complexity of the financial instrument, the market in which the financial instrument is traded, counterparty credit risk, credit structure, concentration, or liquidity. Additionally, an adjustment to the price derived from a model typically reflects our judgment of the inputs that other participants in the market for the financial instrument being measured at fair value would consider in pricing that same financial instrument. In the event an asset is sold, we test the validity of the fair value determined by our valuation techniques by comparing the selling price to the fair value determined for the asset in the immediately preceding month end reporting period.

Certain of our investments do not have readily determinable market prices and/or observable inputs or may at times be affected by the lack of market liquidity. For these securities, we use internally prepared valuations, including valuations based on estimates of future profitability, to estimate the fair value. Additionally, we may obtain prices from independent third-party brokers to aid in establishing valuations for certain of these securities. Key assumptions used by us to determine fair value for these securities include risk free interest rates, risk premiums, performance of underlying collateral (if any), and other factors involving significant assumptions which may or may not reflect those of an active market.

The parameters and inputs used to validate a price on a security may be adjusted for assumptions about risk and current market conditions on a quarter to quarter basis, as certain features may be more significant drivers of valuation at the time of pricing. Changes to inputs in valuations are not changes to valuation methodologies; rather, the inputs are modified to reflect direct or indirect impacts on asset classes from changes in market conditions.

At December 31, 2022, approximately 13.0 percent of our fixed maturity securities were valued using active trades from TRACE pricing or market maker prices for which there was current market activity in that specific security (comparable to receiving one binding quote).  The prices obtained were not adjusted, and the assets were classified as Level 1.

The remaining 87.0 percent of our fixed maturity securities were valued based on non-binding quotes or other observable and unobservable inputs, as discussed below:

•71.0 percent of our fixed maturity securities were valued based on prices from pricing services that generally use observable inputs such as prices for securities or comparable securities in active markets in their valuation techniques. These assets were classified as Level 2. 

•15.1 percent of our fixed maturity securities were valued based on one or more non-binding broker quotes, if validated by observable market data. When only one price is available, it is used if observable inputs and analysis confirms that it is appropriate. These assets, for which we were able to validate the price using other observable market data, were classified as Level 2.

•0.9 percent of our fixed maturity securities were valued based on prices of comparable securities, internal models, or pricing services or other non-binding quotes with no other observable market data. These assets were classified as either Level 2 or Level 3, with the categorization dependent on whether there was other observable market data.  

Derivatives

Fair values for derivatives other than embedded derivatives in modified coinsurance arrangements are based on market quotes or pricing models and represent the net amount of cash we would have paid or received if the contracts had been settled or closed as of the last day of the period. Credit risk related to the counterparty and the Company is considered in determining the fair values of these derivatives. However, since we have collateralization agreements in place with each counterparty which limits our exposure, any credit risk is immaterial. Therefore, we determined that no adjustments for credit risk were required as of December 31, 2022 or 2021.

Fair values for our embedded derivative in a modified coinsurance arrangement are estimated using internal pricing models and represent the hypothetical value of the duration mismatch of assets and liabilities, interest rate risk, and third party credit risk embedded in the modified coinsurance arrangement.

We consider transactions in inactive markets to be less representative of fair value. We use all available observable inputs when measuring fair value, but when significant unobservable inputs are used, we classify these assets or liabilities as Level 3.

Private Equity Partnerships

Our private equity partnerships represent funds that are primarily invested in private credit, private equity, and real assets, as described below. Distributions received from the funds arise from income generated by the underlying investments as well as the liquidation of the underlying investments. There is generally not a public market for these investments.

The following tables present additional information about our private equity partnerships, including commitments for additional investments which may or may not be funded:

		December 31, 2022
Investment Category		Fair Value		Redemption Term / Redemption Notice	Unfunded Commitments
		(in millions of dollars)			(in millions of dollars)
Private Credit	(a)	$	239.3	Not redeemable	$	90.9
		35.7		Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice	13.4
Total Private Credit		275.0			104.3
Private Equity	(b)	453.6		Not redeemable	377.2
		31.7		Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice	39.1
Total Private Equity		485.3			416.3
Real Assets	(c)	373.9		Not redeemable	256.3
		60.1		Quarterly / 90 days notice	—
Total Real Assets		434.0			256.3
Total Partnerships		$	1,194.3		$	776.9

		December 31, 2021
Investment Category		Fair Value		Redemption Term / Redemption Notice	Unfunded Commitments
		(in millions of dollars)			(in millions of dollars)
Private Credit	(a)	$	240.6	Not redeemable	$	143.7
		38.8		Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice	6.8
Total Private Credit		279.4			150.5
Private Equity	(b)	365.8		Not redeemable	274.3
		18.8		Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice	50.3
Total Private Equity		384.6			324.6
Real Assets	(c)	256.2		Not redeemable	278.1
		58.4		Quarterly / 90 days notice	—
Total Real Assets		314.6			278.1
Total Partnerships		$	978.6		$	753.2

(a)Private Credit - The limited partnerships described in this category employ various investment strategies, generally providing direct lending or other forms of debt financing including first-lien, second-lien, mezzanine, and subordinated loans. The limited partnerships have credit exposure to corporates, physical assets, and/or financial assets within a variety of industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail) in North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 55 percent in the next 3 years, 34 percent during the period from 3 to 5 years, 9 percent during the period from 5 to 10 years, and 2 percent during the period from 10 to 15 years.

(b)Private Equity - The limited partnerships described in this category employ various strategies generally investing in controlling or minority control equity positions directly in companies and/or assets across various industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail), primarily in private markets within North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 35 percent in the next 3 years, 19 percent during the period from 3 to 5 years, 40 percent during the period from 5 to 10 years, and 6 percent during the period from 10 to 15 years.

(c)Real Assets - The limited partnerships described in this category employ various strategies, which include investing in the equity and/or debt financing of physical assets, including infrastructure (energy, power, water/wastewater, communications), transportation (including airports, ports, toll roads, aircraft, railcars) and real estate in North America, Europe, South America, and Asia.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 22 percent in the next 3 years, 28 percent during period from 3 to 5 years and 50 percent during the period from 5 to 10 years.

We record changes in our share of net asset value of the partnerships in net investment income. We receive financial information related to our investments in partnerships and generally record investment income on a one-quarter lag in accordance with our accounting policy.

The following tables present information about financial instruments measured at fair value on a recurring basis by fair value level, based on the observability of the inputs used.

	December 31, 2022
	Level 1		Level 2		Level 3		NAV		Total
	(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities	$	81.7	$	416.5	$	—	$	—	$	498.2
States, Municipalities, and Political Subdivisions	8.7		3,448.3		0.2		—		3,457.2
Foreign Governments	—		827.1		—		—		827.1
Public Utilities	160.1		4,796.8		—		—		4,956.9
Mortgage/Asset-Backed Securities	—		551.3		22.0		—		573.3
All Other Corporate Bonds	4,268.6		20,097.3		158.7		—		24,524.6
Redeemable Preferred Stocks	—		3.5		—		—		3.5
Total Fixed Maturity Securities	4,519.1		30,140.8		180.9		—		34,840.8
Other Long-term Investments
Derivatives
Forwards	—		5.6		—		—		5.6
Foreign Exchange Contracts	—		83.5		—		—		83.5
Total Derivatives	—		89.1		—		—		89.1
Perpetual Preferred and Equity Securities	—		9.6		16.2		—		25.8
Private Equity Partnerships	—		—		—		1,194.3		1,194.3
Total Other Long-term Investments	—		98.7		16.2		1,194.3		1,309.2
Total Financial Instrument Assets Carried at Fair Value	$	4,519.1	$	30,239.5	$	197.1	$	1,194.3	$	36,150.0
Liabilities
Other Liabilities
Derivatives
Forwards	$	—	$	48.5	$	—	$	—	$	48.5
Foreign Exchange Contracts	—		25.5		—		—		25.5
Embedded Derivative in Modified Coinsurance Arrangement	—		—		13.9		—		13.9
Total Derivatives	—		74.0		13.9		—		87.9
Total Financial Instrument Liabilities Carried at Fair Value	$	—	$	74.0	$	13.9	$	—	$	87.9

	December 31, 2021
	Level 1		Level 2		Level 3		NAV		Total
	(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities	$	—	$	580.1	$	—	$	—	$	580.1
States, Municipalities, and Political Subdivisions	—		4,714.1		13.4		—		4,727.5
Foreign Governments	—		1,125.8		20.8		—		1,146.6
Public Utilities	230.8		6,140.7		44.5		—		6,416.0
Mortgage/Asset-Backed Securities	—		451.1		187.2		—		638.3
All Other Corporate Bonds	3,288.7		25,673.2		861.5		—		29,823.4
Redeemable Preferred Stocks	—		4.1		—		—		4.1
Total Fixed Maturity Securities	3,519.5		38,689.1		1,127.4		—		43,336.0
Other Long-term Investments
Derivatives
Foreign Exchange Contracts	—		39.5		—		—		39.5
Total Derivatives	—		39.5		—		—		39.5
Perpetual Preferred and Equity Securities	—		27.9		5.8		—		33.7
Private Equity Partnerships	—		—		—		978.6		978.6
Total Other Long-term Investments	—		67.4		5.8		978.6		1,051.8
Total Financial Instrument Assets Carried at Fair Value	$	3,519.5	$	38,756.5	$	1,133.2	$	978.6	$	44,387.8
Liabilities
Other Liabilities
Derivatives
Foreign Exchange Contracts	$	—	$	35.0	$	—	$	—	$	35.0
Embedded Derivative in Modified Coinsurance Arrangement	—		—		30.1		—		30.1
Total Derivatives	—		35.0		30.1		—		65.1
Total Financial Instrument Liabilities Carried at Fair Value	$	—	$	35.0	$	30.1	$	—	$	65.1

Changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows:

	Year Ended December 31, 2022
	Fair Value Beginning of Year		Total Realized and Unrealized Investment Gains (Losses)  Included in				Purchases		Sales/Maturities		Level 3 Transfers				Fair Value End of Year		Change in Unrealized Gain (Loss) on Securities Held at the End of Period included in
			Earnings		OCI						Into		Out of				OCI		Earnings
	(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions	$	13.4	$	—	$	(0.1)	$	—	$	—	$	0.3	$	(13.4)	$	0.2	$	(0.1)	$	—
Foreign Governments	20.8		—		(0.8)		—		(20.0)		—		—		—		(0.8)		—
Public Utilities	44.5		—		(2.8)		—		(12.8)		15.6		(44.5)		—		(2.8)		—
Mortgage/Asset-Backed Securities	187.2		—		(0.3)		20.7		(10.6)		—		(175.0)		22.0		(0.3)		—
All Other Corporate Bonds	861.5		—		(32.0)		25.3		(102.3)		161.9		(755.7)		158.7		(32.0)		—
Total Fixed Maturity Securities	1,127.4		—		(36.0)		46.0		(145.7)		177.8		(988.6)		180.9		(36.0)		—
Perpetual Preferred and Equity Securities	5.8		3.0		—		7.1		—		0.3		—		16.2		—		3.0
Embedded Derivative in Modified Coinsurance Arrangement	(30.1)		16.2		—		—		—		—		—		(13.9)		—		16.2

	Year Ended December 31, 2021
	Fair Value Beginning of Year		Total Realized and Unrealized Investment Gains (Losses)  Included in				Purchases		Sales/Maturities		Level 3 Transfers				Fair Value End of Year		Change in Unrealized Gain (Loss) on Securities Held at the End of Period included in
			Earnings		OCI						Into		Out of				OCI		Earnings
	(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions	$	15.5	$	—	$	(2.1)	$	—	$	—	$	—	$	—	$	13.4	$	(2.1)	$	—
Foreign Governments	21.8		—		(1.0)		—		—		—		—		20.8		(1.0)		—
Public Utilities	185.7		—		(2.3)		—		(44.0)		36.0		(130.9)		44.5		(2.3)		—
Mortgage/Asset-Backed Securities	81.3		—		(96.0)		—		(72.3)		274.2		—		187.2		(96.0)		—
All Other Corporate Bonds	943.1		—		(24.6)		249.9		(80.2)		77.6		(304.3)		861.5		(24.6)		—
Total Fixed Maturity Securities	1,247.4		—		(126.0)		249.9		(196.5)		387.8		(435.2)		1,127.4		(126.0)		—
Perpetual Preferred and Equity Securities	4.7		0.1		—		1.0		—		—		—		5.8		—		0.1
Embedded Derivative in Modified Coinsurance Arrangement	(39.8)		9.7		—		—		—		—		—		(30.1)		—		9.7

Realized and unrealized investment gains and losses presented in the preceding tables represent gains and losses only for the time during which the applicable financial instruments were classified as Level 3. The transfers between levels resulted primarily from a change in observability of three inputs used to determine fair values of the securities transferred: (1) transactional data for new issuance and secondary trades, (2) broker/dealer quotes and pricing, primarily related to changes in the level of activity in the market and whether the market was considered orderly, and (3) comparable bond metrics from which to perform an analysis. For fair value measurements of financial instruments that were transferred either into or out of Level 3, we reflect the transfers using the fair value at the beginning of the period. We believe this allows for greater transparency, as all changes in fair value that arise during the reporting period of the transfer are disclosed as a component of our Level 3 reconciliation.

The table below provides quantitative information regarding the significant unobservable inputs used in Level 3 fair value measurements derived from internal models. Unobservable inputs for fixed maturity securities are weighted by the fair value of the securities. Certain securities classified as Level 3 are excluded from the table below due to limitations in our ability to obtain the underlying inputs used by external pricing sources.

	December 31, 2022
	Fair Value		Valuation Method	Unobservable Input		Range/Weighted Average
	(in millions of dollars)
Fixed Maturity Securities
All Other Corporate Bonds - Private	$	15.3	Market Approach	Volatility of Credit Market Convention	(a) (b)	5.41% - 5.41% / 5.41% Priced at Par Value
Perpetual Preferred and Equity Securities	16.2		Market Approach	Market Convention	(b)	Priced at Cost, Owner's Equity, or Most Recent Round
Embedded Derivative in Modified Coinsurance Arrangement	(13.9)		Discounted Cash Flows	Projected Liability Cash Flows Weighted Spread of Swap Curve	(d)	Actuarial Assumptions 0.6%

	December 31, 2021
	Fair Value		Valuation Method	Unobservable Input		Range/Weighted Average
	(in millions of dollars)
Fixed Maturity Securities
All Other Corporate Bonds - Private	$	111.8	Market Approach	Volatility of Credit Lack of Marketability	(a) (c)	6.30% - 6.30% / 6.30% 0.14% - 0.73% / 0.51%
Perpetual Preferred and Equity Securities	5.8		Market Approach	Market Convention	(b)	Priced at Cost or Owner's Equity
Embedded Derivative in Modified Coinsurance Arrangement	(30.1)		Discounted Cash Flows	Projected Liability Cash Flows Weighted Spread of Swap Curve	(d)	Actuarial Assumptions 0.7%

(a)Represents basis point adjustments for credit-specific factors

(b)Represents a decision to price based on par value, cost, owner's equity, or the price of the most recent capital funding round when limited data is available

(c)Represents basis point adjustments to apply a discount due to the illiquidity of an investment

(d)Represents various actuarial assumptions required to derive the liability cash flows. Fair value of embedded derivative is most often driven by the change in the weighted average credit spread to the swap curve for the assets backing the hypothetical loan

Other than market convention, the impact of isolated decreases in unobservable inputs will result in a higher estimated fair value, whereas isolated increases in unobservable inputs will result in a lower estimated fair value. The unobservable input for market convention is not sensitive to input movements. The projected liability cash flows used in the fair value measurement of our Level 3 embedded derivative are based on expected claim payments. If claim payments increase, the projected liability cash flows will increase, resulting in a decrease in the fair value of the embedded derivative. Decreases in projected liability cash flows will result in an increase in the fair value of the embedded derivative.

Fair Value Measurements for Financial Instruments Not Carried at Fair Value

The methods and assumptions used to estimate fair values of financial instruments not carried at fair value are discussed as follows:

Mortgage Loans: Fair value of newly originated, seasoned performing, or sub-performing but likely to continue cash flowing loans are calculated using a discounted cash flow analysis. Loans’ cash flows are modeled and appropriately discounted by a rate based on current yields and credit spreads. For sub and non-performing loans where there is some probability the loan will not continue to pay, a price based approach would be used to estimate the loan’s value in the open market utilizing current transaction information from similar loans.

Policy Loans: Fair values for policy loans, net of reinsurance ceded, are estimated using discounted cash flow analyses and interest rates currently being offered to policyholders with similar policies. Carrying amounts for ceded policy loans, which equal $3,312.5 million and $3,373.7 million as of December 31, 2022 and 2021, respectively, approximate fair value and are reported on a gross basis in our consolidated balance sheets. A change in interest rates for ceded policy loans will not impact our financial position because the benefits and risks are fully ceded to reinsuring counterparties.

Miscellaneous Long-term Investments: Carrying amounts for tax credit partnerships equal the unamortized balance of our contractual commitments and approximate fair value. Our shares of Federal Home Loan Bank (FHLB) common stock are carried at cost, which approximates fair value.

Long-term Debt: Fair values for long-term debt are obtained from independent pricing services or discounted cash flow analyses based on current incremental borrowing rates for similar types of borrowing arrangements.

FHLB Funding Agreements: Funding agreements with the FHLB represent cash advances used for the purpose of investing in fixed maturity securities. Carrying amounts approximate fair value.

Unfunded Commitments to Investment Partnerships: Unfunded equity commitments represent amounts that we have committed to fund certain investment partnerships. These commitments are legally binding, subject to the partnerships meeting specified conditions. Carrying amounts of these financial instruments approximate fair value.

The following table presents the carrying amounts and estimated fair values of our financial instruments not measured at fair value and indicates the level in the fair value hierarchy of the estimated fair value measurement based on the observability of the inputs used:

	December 31, 2022
	Estimated Fair Value
	Level 1		Level 2		Level 3		Total		Carrying Value
	(in millions of dollars)
Assets
Mortgage Loans	$	—	$	2,159.5	$	—	$	2,159.5	$	2,435.4
Policy Loans	—		—		3,677.0		3,677.0		3,601.2
Other Long-term Investments
Miscellaneous Long-term Investments	—		17.1		1.3		18.4		18.4
Total Financial Instrument Assets Not Carried at Fair Value	$	—	$	2,176.6	$	3,678.3	$	5,854.9	$	6,055.0
Liabilities
Long-term Debt	$	2,288.9	$	783.1	$	—	$	3,072.0	$	3,427.8
Other Liabilities
Unfunded Commitments	—		0.7		—		0.7		0.7
Payable for Collateral on FHLB Funding Agreements	—		99.1		—		99.1		99.1
Total Financial Instrument Liabilities Not Carried at Fair Value	$	2,288.9	$	882.9	$	—	$	3,171.8	$	3,527.6

	December 31, 2021
	Estimated Fair Value
	Level 1		Level 2		Level 3		Total		Carrying Value
	(in millions of dollars)
Assets
Mortgage Loans	$	—	$	2,677.8	$	—	$	2,677.8	$	2,560.4
Policy Loans	—		—		3,807.1		3,807.1		3,662.9
Other Long-term Investments
Miscellaneous Long-term Investments	—		22.1		9.5		31.6		31.6
Total Financial Instrument Assets Not Carried at Fair Value	$	—	$	2,699.9	$	3,816.6	$	6,516.5	$	6,254.9
Liabilities
Long-term Debt	$	2,237.3	$	1,641.8	$	—	$	3,879.1	$	3,442.2
Other Liabilities
Unfunded Commitments	—		0.7		—		0.7		0.7
Payable for Collateral on FHLB Funding Agreements	—		160.9		—		160.9		160.9
Total Financial Instrument Liabilities Not Carried at Fair Value	$	2,237.3	$	1,803.4	$	—	$	4,040.7	$	3,603.8

The carrying values of financial instruments such as short-term investments, cash and bank deposits, accounts and premiums receivable, accrued investment income, securities lending agreements, and short-term debt approximate fair value due to the short-term nature of the instruments. As such, these financial instruments are not included in the above chart.

Fair values for insurance contracts other than investment contracts are not required to be disclosed. However, the fair values of liabilities under all insurance contracts are taken into consideration in our overall management of interest rate risk, which seeks to minimize exposure to changing interest rates through the matching of investment maturities with amounts due under insurance contracts.

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Investments

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Investments

Fixed Maturity Securities

At December 31, 2022 and 2021, all fixed maturity securities were classified as available-for-sale. The amortized cost and fair values of securities by security type are shown as follows:

	December 31, 2022
	Amortized Cost, Gross of ACL(1)		ACL(1)		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	503.8	$	—	$	20.3	$	25.9	$	498.2
States, Municipalities, and Political Subdivisions	4,006.0		—		87.1		635.9		3,457.2
Foreign Governments	908.1		—		34.9		115.9		827.1
Public Utilities	5,170.9		—		141.0		355.0		4,956.9
Mortgage/Asset-Backed Securities	592.1		—		8.2		27.0		573.3
All Other Corporate Bonds	26,640.3		—		452.1		2,567.8		24,524.6
Redeemable Preferred Stocks	4.0		—		—		0.5		3.5
Total Fixed Maturity Securities	$	37,825.2	$	—	$	743.6	$	3,728.0	$	34,840.8

	December 31, 2021
	Amortized Cost, Gross of ACL(1)		ACL(1)		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	460.1	$	—	$	120.1	$	0.1	$	580.1
States, Municipalities, and Political Subdivisions	4,150.2		—		584.2		6.9		4,727.5
Foreign Governments	952.0		—		215.3		20.7		1,146.6
Public Utilities	5,266.4		—		1,159.4		9.8		6,416.0
Mortgage/Asset-Backed Securities	587.9		—		50.4		—		638.3
All Other Corporate Bonds	25,966.1		—		3,919.9		62.6		29,823.4
Redeemable Preferred Stocks	4.0		—		0.1		—		4.1
Total Fixed Maturity Securities	$	37,386.7	$	—	$	6,049.4	$	100.1	$	43,336.0

(1)Allowance for Credit Losses

The following charts indicate the length of time our fixed maturity securities have been in a gross unrealized loss position.

	December 31, 2022
	Less Than 12 Months				12 Months or Greater
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	246.6	$	22.6	$	12.2	$	3.3
States, Municipalities, and Political Subdivisions	1,920.1		476.1		346.6		159.8
Foreign Governments	160.1		47.9		176.9		68.0
Public Utilities	2,242.2		252.0		255.2		103.0
Mortgage/Asset-Backed Securities	386.6		27.0		0.1		—
All Other Corporate Bonds	15,865.6		1,799.7		2,194.1		768.1
Redeemable Preferred Stocks	3.5		0.5		—		—
Total Fixed Maturity Securities	$	20,824.7	$	2,625.8	$	2,985.1	$	1,102.2

	December 31, 2021
	Less Than 12 Months				12 Months or Greater
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	9.3	$	0.1	$	—	$	—
States, Municipalities, and Political Subdivisions	326.4		6.9		0.4		—
Foreign Governments	234.4		18.9		10.7		1.8
Public Utilities	263.3		9.1		17.6		0.7
Mortgage/Asset-Backed Securities	29.2		—		0.1		—
All Other Corporate Bonds	2,146.3		51.6		199.4		11.0
Total Fixed Maturity Securities	$	3,008.9	$	86.6	$	228.2	$	13.5

The following is a distribution of the maturity dates for fixed maturity securities. The maturity dates have not been adjusted for possible calls or prepayments.

	December 31, 2022
	Amortized Cost, Net of ACL(1)		Unrealized Gain Position				Unrealized Loss Position
			Gross Gain		Fair Value		Gross Loss		Fair Value
	(in millions of dollars)
1 year or less	$	1,133.5	$	2.9	$	339.1	$	5.7	$	791.6
Over 1 year through 5 years	7,090.8		86.7		1,953.2		238.4		4,985.9
Over 5 years through 10 years	10,096.7		294.8		3,538.9		863.8		5,988.8
Over 10 years	18,912.1		351.0		5,013.2		2,593.1		11,656.8
	37,233.1		735.4		10,844.4		3,701.0		23,423.1
Mortgage/Asset-Backed Securities	592.1		8.2		186.6		27.0		386.7
Total Fixed Maturity Securities	$	37,825.2	$	743.6	$	11,031.0	$	3,728.0	$	23,809.8

	December 31, 2021
	Amortized Cost, Net of ACL(1)		Unrealized Gain Position				Unrealized Loss Position
			Gross Gain		Fair Value		Gross Loss		Fair Value
	(in millions of dollars)
1 year or less	$	767.3	$	17.6	$	756.0	$	0.1	$	28.9
Over 1 year through 5 years	6,613.2		540.2		7,050.5		6.0		96.9
Over 5 years through 10 years	10,614.3		1,453.3		10,905.0		26.0		1,136.6
Over 10 years	18,804.0		3,987.9		20,778.4		68.0		1,945.4
	36,798.8		5,999.0		39,489.9		100.1		3,207.8
Mortgage/Asset-Backed Securities	587.9		50.4		609.0		—		29.3
Total Fixed Maturity Securities	$	37,386.7	$	6,049.4	$	40,098.9	$	100.1	$	3,237.1

(1)Allowance for Credit Losses

The following chart depicts an analysis of our fixed maturity security portfolio between investment-grade and below-investment-grade categories as of December 31, 2022:

					Gross Unrealized Loss
	Fair Value		Gross Unrealized Gain		Amount		Percent of Total Gross Unrealized Loss
	(in millions of dollars)
Investment-Grade	$	32,851.0	$	734.6	$	3,545.5	95.1	%
Below-Investment-Grade	1,989.8		9.0		182.5		4.9
Total Fixed Maturity Securities	$	34,840.8	$	743.6	$	3,728.0	100.0	%

The unrealized losses on investment-grade fixed maturity securities principally relate to changes in interest rates or changes in market or sector credit spreads which occurred subsequent to the acquisition of the securities. Below-investment-grade fixed maturity securities are generally more likely to develop credit concerns than investment-grade securities. At December 31, 2022, the unrealized losses in our below-investment-grade fixed maturity securities were generally due to credit spreads in certain industries or sectors and, to a lesser extent, credit concerns related to specific securities. For each specific security in an unrealized loss position, we believe that there are positive factors which mitigate credit concerns and that the securities for which we have not recorded a credit loss will recover in value. We have the ability and intent to continue to hold these securities to recovery of amortized cost and believe that no credit losses have occurred.

As of December 31, 2022, we held 882 individual investment-grade fixed maturity securities and 112 individual below-investment-grade fixed maturity securities that were in an unrealized loss position, of which 262 investment-grade fixed maturity securities and 16 below-investment-grade fixed maturity securities had been in an unrealized loss position continuously for over one year.

In determining when a decline in fair value below amortized cost of a fixed maturity security represents a credit loss, we evaluate the following factors:

•Whether we expect to recover the entire amortized cost basis of the security

•Whether we intend to sell the security or will be required to sell the security before the recovery of its amortized cost basis

•Whether the security is current as to principal and interest payments

•The significance of the decline in value

•Current and future business prospects and trends of earnings

•The valuation of the security's underlying collateral

•Relevant industry conditions and trends relative to their historical cycles

•Market conditions

•Rating agency and governmental actions

•Bid and offering prices and the level of trading activity

•Adverse changes in estimated cash flows for securitized investments

•Changes in fair value subsequent to the balance sheet date

•Any other key measures for the related security

While determining whether a credit loss exists is a judgmental area, we utilize a formal, well-defined, and disciplined process to monitor and evaluate our fixed income investment portfolio, supported by issuer specific research and documentation as of the end of each period. The process results in a thorough evaluation of problem investments and the recording of credit losses on a timely basis for investments determined to have a credit loss. We calculate the allowance for credit losses of fixed maturity securities based on the present value of our best estimate of cash flows expected to be collected, discounted using the effective interest rate implicit in the security at the date of acquisition. When estimating future cash flows, we analyze the strength of the issuer’s balance sheet, its debt obligations and near-term funding arrangements, cash flow and liquidity, the profitability of its core businesses, the availability of marketable assets which could be sold to increase liquidity, its industry fundamentals and regulatory environment, and its access to capital markets.

The following tables present a rollforward of the allowance for credit losses on available-for-sale fixed maturity securities, which were classified as "public utilities" during year ended December 31, 2022 and "all other corporate bonds" during the year ended December 31, 2021, respectively.

	Year Ended December 31
	2022		2021
	(in millions of dollars)
Balance, beginning of period	$	—	$	6.8
Credit losses on securities for which credit losses were not previously recorded	4.6		—
Change in allowance on securities with allowance recorded in previous period	—		0.5
Change in allowance on securities disposed during the period	(4.6)		(7.3)
Balance, end of period	$	—	$	—

In the fourth quarter of 2022, the issuer of a fixed maturity security previously classified as "public utilities" entered into a troubled debt restructuring agreement. In order to maximize recovery of the investment, the debt was restructured by way of principal reduction, interest forgiveness, and a debt to equity conversion. Principal owed was reduced by $4.8 million, semi-annual interest payments for the period beginning June 30, 2022 and ending June 30, 2024 were forgiven, and a portion of the remaining debt was converted to equity. As of December 31, 2022, we have received $4.9 million of an equity stake in the restructured entity, and have recorded receivables for $5.2 million and $2.8 million in cash to be received by March 31, 2023 and

December 31, 2023, respectively. The amortized cost of the fixed maturity security prior to the restructuring was $17.7 million, and the restructuring resulted in a total loss of $4.8 million, which was recognized during 2022.

At December 31, 2022, we had commitments of $58.7 million to fund private placement fixed maturity securities, the amount of which may or may not be funded. 

Variable Interest Entities

We invest in variable interests issued by variable interest entities. These investments, which are passive in nature, include minority ownership interests in private equity partnerships, tax credit partnerships, and special purpose entities. For those variable interests that are not consolidated in our financial statements, we are not the primary beneficiary because we have neither the power to direct the activities that are most significant to economic performance nor the responsibility to absorb a majority of the expected losses. The determination of whether we are the primary beneficiary is performed at the time of our initial investment and at the date of each subsequent reporting period.

As of December 31, 2022, the carrying amount of our variable interest entity investments that are not consolidated in our financial statements was $1,195.3 million, comprised of $1.0 million of tax credit partnerships and $1,194.3 million of private equity partnerships. At December 31, 2021, the carrying amount of our variable interest entity investments that are not consolidated in our financial statements was $987.9 million, comprised of $9.3 million of tax credit partnerships and $978.6 million of private equity partnerships.  These variable interest entity investments are reported as other long-term investments in our consolidated balance sheets.

The Company invests in tax credit partnerships primarily for the receipt of income tax credits and tax benefits derived from passive losses on the investments. Amounts recognized in the consolidated statements of income are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Income Tax Credits	$	8.0	$	21.6	$	33.2
Amortization, Net of Tax	(5.9)		(15.0)		(21.9)
Income Tax Benefit	$	2.1	$	6.6	$	11.3

Contractually, we are a limited partner in these tax credit partnerships, and our maximum exposure to loss is limited to the carrying value of our investment, which includes $0.7 million of unfunded unconditional commitments at December 31, 2022. See Note 2 for commitments to fund private equity partnerships.

Mortgage Loans

Our mortgage loan portfolio is well diversified by both geographic region and property type to reduce risk of concentration. All of our mortgage loans are collateralized by commercial real estate. When issuing a new loan, our general policy is not to exceed a loan-to-value ratio, or the ratio of the loan balance to the estimated fair value of the underlying collateral, of 75 percent. We update the loan-to-value ratios at least every three years for each loan, and properties undergo a general inspection at least every two years. Our general policy for newly issued loans is to have a debt service coverage ratio greater than 1.25 times on a normalized 25 year amortization period. We update our debt service coverage ratios annually.

We carry our mortgage loans at amortized cost less the allowance for expected credit losses. The amortized cost of our mortgage loans was $2,444.7 million and $2,568.7 million at December 31, 2022 and 2021, respectively. The allowance for expected credit losses was $9.3 million and $8.3 million at December 31, 2022 and 2021, respectively. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. We report accrued interest income for our mortgage loans as accrued investment income on our consolidated balance sheets, and the amount of the accrued income was $7.7 million and $8.1 million at December 31, 2022 and 2021, respectively.

The carrying amount of mortgage loans by property type and geographic region are presented below.

	December 31
	2022				2021
	(in millions of dollars)
	Carrying		Percent of		Carrying		Percent of
	Amount		Total		Amount		Total
Property Type
Apartment	$	688.6	28.3	%	$	780.0	30.5	%
Industrial	745.3		30.6		734.4		28.7
Office	423.0		17.4		467.2		18.2
Retail	534.5		21.9		533.3		20.8
Other	44.0		1.8		45.5		1.8
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

Region
New England	$	52.4	2.2	%	$	54.9	2.1	%
Mid-Atlantic	192.4		7.9		214.7		8.4
East North Central	313.0		12.9		298.4		11.7
West North Central	181.4		7.4		193.1		7.5
South Atlantic	539.3		22.1		582.1		22.7
East South Central	101.8		4.2		120.7		4.7
West South Central	212.6		8.7		243.2		9.6
Mountain	298.7		12.3		290.6		11.3
Pacific	543.8		22.3		562.7		22.0
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

The risk in our mortgage loan portfolio is primarily related to vacancy rates. Events or developments, such as economic conditions that impact the ability of the borrowers to ensure occupancy of the property, may have a negative effect on our mortgage loan portfolio, particularly to the extent that our portfolio is concentrated in an affected region or property type. An increase in vacancies increases the probability of default, which would negatively affect our expected losses in our mortgage loan portfolio.

We evaluate each of our mortgage loans individually for impairment and assign an internal credit quality rating based on a comprehensive rating system used to evaluate the credit risk of the loan. The factors we use to derive our internal credit ratings may include the following:

•Loan-to-value ratio based on internal appraisal of property

•Debt service coverage ratio based on current operating income

•Property location, including regional economics, trends, and demographics

•Age, condition, and construction quality of property

•Current and historical occupancy of property

•Lease terms relative to market

•Tenant size and financial strength

•Borrower's financial strength

•Borrower's equity in transaction

•Additional collateral, if any

Although all available and applicable factors are considered in our analysis, loan-to-value and debt service coverage ratios are the most critical factors in determining whether we will initially issue the loan and also in assigning values and determining impairment. We assign an overall rating to each loan using an internal rating scale of AA (highest quality) to B (lowest quality).

We review and adjust, as needed, our internal credit quality ratings on an annual basis. This review process is performed more frequently for mortgage loans deemed to have a higher risk of delinquency.

The following tables present information about mortgage loans by the applicable credit quality indicators:

	December 31
	2022				2021
	(in millions of dollars)
	Carrying Amount		Percent of Total		Carrying Amount		Percent of Total
Internal Rating
AA	$	92.3	3.8	%	$	27.3	1.1	%
A	843.9		34.6		709.6		27.7
BBB	1,458.0		59.9		1,802.6		70.4
BB	41.2		1.7		20.9		0.8
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

Loan-to-Value Ratio(1)
<= 65%	$	1,389.6	57.0	%	$	1,346.1	52.6	%
> 65% <= 75%	937.2		38.5		1,076.8		42.0
> 75% <= 85%	75.0		3.1		114.9		4.5
> 85%	33.6		1.4		22.6		0.9
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

The following table presents the amortized cost of our mortgage loans by year of origination and credit quality indicators for the years ended December 31, 2022 and 2021:

	Year Ended December 31, 2022
	Prior to 2018		2018		2019		2020		2021		2022		Total
	(in millions of dollars)
Internal Rating
AA	$	53.8	$	27.5	$	11.1	$	—	$	—	$	—	$	92.4
A	485.0		123.3		96.8		35.9		80.6		24.0		845.6
BBB	534.0		219.8		236.9		134.0		275.8		64.6		1,465.1
BB	35.7		5.9		—		—		—		—		41.6
Total Amortized Cost	1,108.5		376.5		344.8		169.9		356.4		88.6		2,444.7
Allowance for credit losses	(4.3)		(1.8)		(1.3)		(0.6)		(0.8)		(0.5)		(9.3)
Carrying Amount	$	1,104.2	$	374.7	$	343.5	$	169.3	$	355.6	$	88.1	$	2,435.4
Loan-to-Value Ratio(1)
<=65%	$	782.6	$	189.0	$	193.9	$	81.3	$	128.9	$	16.9	$	1,392.6
>65<=75%	230.2		181.6		150.9		80.1		227.5		71.7		942.0
>75%<=85%	67.5		—		—		8.5		—		—		76.0
>85%	28.2		5.9		—		—		—		—		34.1
Total Amortized Cost	1,108.5		376.5		344.8		169.9		356.4		88.6		2,444.7
Allowance for credit losses	(4.3)		(1.8)		(1.3)		(0.6)		(0.8)		(0.5)		(9.3)
Carrying Amount	$	1,104.2	$	374.7	$	343.5	$	169.3	$	355.6	$	88.1	$	2,435.4

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

	Year Ended December 31, 2021
	Prior to 2017		2017		2018		2019		2020		2021		Total
	(in millions of dollars)
Internal Rating
AA	$	3.3	$	—	$	24.0	$	—	$	—	$	—	$	27.3
A	414.6		68.0		71.1		28.9		17.6		110.6		710.8
BBB	561.2		227.3		283.3		331.9		163.1		242.6		1,809.4
BB	5.0		10.2		6.0		—		—		—		21.2
Total Amortized Cost	984.1		305.5		384.4		360.8		180.7		353.2		2,568.7
Allowance for credit losses	(2.6)		(1.4)		(1.4)		(1.4)		(0.7)		(0.8)		(8.3)
Carrying Amount	$	981.5	$	304.1	$	383.0	$	359.4	$	180.0	$	352.4	$	2,560.4
Loan-to-Value Ratio(1)
<=65%	$	779.1	$	146.9	$	163.0	$	80.7	$	54.3	$	124.7	$	1,348.7
>65<=75%	115.7		115.4		215.4		280.1		126.4		228.5		1,081.5
>75%<=85%	89.3		26.3		—		—		—		—		115.6
>85%	—		16.9		6.0		—		—		—		22.9
Total Amortized Cost	984.1		305.5		384.4		360.8		180.7		353.2		2,568.7
Allowance for credit losses	(2.6)		(1.4)		(1.4)		(1.4)		(0.7)		(0.8)		(8.3)
Carrying Amount	$	981.5	$	304.1	$	383.0	$	359.4	$	180.0	$	352.4	$	2,560.4

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

The following tables present a roll forward of allowance for expected credit losses by loan-to-value ratio for the years ended December 31, 2022 and 2021:

	Year Ended December 31, 2022
	Beginning of Period		Current Period Provisions		Write-Offs		Recoveries		End of Period
	(in millions of dollars)
Loan-to-Value Ratio(1)
<=65%	$	2.6	$	0.4	$	—	$	—	$	3.0
>65<=75%	4.7		—		—		—		4.7
>75%<=85%	0.7		0.4		—		—		1.1
>85%	0.3		0.2		—		—		0.5
Total	$	8.3	$	1.0	$	—	$	—	$	9.3

	Year Ended December 31, 2021
	Beginning of Period		Current Period Provisions		Write-Offs		Recoveries		End of Period
	(in millions of dollars)
Loan-to-Value Ratio(1)
<=65%	$	3.4	$	(0.8)	$	—	$	—	$	2.6
>65<=75%	7.3		(2.6)		—		—		4.7
>75%<=85%	1.3		(0.6)		—		—		0.7
>85%	1.1		(0.8)		—		—		0.3
Total	$	13.1	$	(4.8)	$	—	$	—	$	8.3

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

The increase in our estimate of expected losses during the year ended December 31, 2022 is primarily driven by heightened uncertainty surrounding the future macroeconomic outlook and reflects market conditions as of December 31, 2022.The decrease in our estimate of expected losses during the year ended December 31, 2021 is primarily due to improved economic conditions and recovery from COVID-19, especially as it relates to underlying commercial real estate values, and reflects market conditions at December 31, 2021.

There were no troubled debt restructurings during 2022, 2021 or 2020. At December 31, 2022, we held no mortgage loans that were greater than 90 days past due regarding principal and/or interest payments.

We had no loan foreclosures for the years ended December 31, 2022, 2021, or 2020.

For the years ended December 31, 2022, 2021, and 2020 we had no impaired mortgage loans. We did not recognize any interest income during 2022, 2021 or 2020 on mortgage loans subsequent to impairment.

For the years ended December 31, 2022 and 2021, we had commitments of $5.0 million and $26.3 million, respectively to fund certain commercial mortgage loans. Consistent with how we determine the estimate of current expected credit losses for our funded mortgage loans each period, we estimate expected credit losses for loans that have not been funded but we are committed to fund at the end of each period. For the year ended December 31, 2022, we had a nominal amount of expected credit losses related to unfunded commitments on our consolidated balance sheets. For the year ended December 31, 2021, we had $0.1 million of expected credit losses related to unfunded commitments on our consolidated balance sheets.

Investment Real Estate

Our investment real estate balance was $71.6 million and $119.5 million at December 31, 2022 and 2021, respectively, and the associated accumulated depreciation was $122.1 million and $171.3 million at December 31, 2022 and 2021, respectively. We did not recognize any impairments related to our real estate during 2022 or 2021. For the year ended December 31, 2020, we recognized $36.6 million in impairments related to certain of our real estate held for investment.

During the first quarter of 2022, we reclassified one property previously held for the production of income to property held for sale. The carrying value of the property was $40.1 million and $40.9 million as of December 31, 2022 and December 31, 2021, respectively, and is primarily recorded within our Corporate segment. The estimated fair value less cost to sell is above the carrying value of the property, and we expect to close the sale of the property in the first quarter of 2023.

During the third quarter of 2022, we reclassified one property previously held for the production of income to property held for sale. The property had a carrying value of $0.8 million as of December 31, 2022 and December 31, 2021, respectively, and is recorded within our Corporate segment. The estimated fair value less cost to sell is above the carrying value for this property, and we expect to close the sale of this property during 2023.

During the third quarter of 2022 we reclassified one additional property previously held for the production of income to property held for sale. In November of 2022, we closed on the sale of this property. At the time of sale the carrying value of this property was $3.4 million, and we recognized a nominal realized gain.

Transfers of Financial Assets

To manage our cash position more efficiently, we may enter into repurchase agreements with unaffiliated financial institutions. We generally use repurchase agreements as a means to finance the purchase of invested assets or for short-term general business purposes until projected cash flows become available from our operations or existing investments. Our repurchase agreements are typically outstanding for less than 30 days. We post collateral through our repurchase agreement transactions whereby the counterparty commits to purchase securities with the agreement to resell them to us at a later, specified date. The fair value of collateral posted is generally 102 percent of the cash received.

Our investment policy also permits us to lend fixed maturity securities to unaffiliated financial institutions in short-term securities lending agreements. These agreements increase our investment income with minimal risk. Our securities lending policy requires that a minimum of 102 percent of the fair value of the securities loaned be maintained as collateral. We may

receive cash and/or securities as collateral under these agreements. Cash received as collateral is typically reinvested in short-term investments. If securities are received as collateral, we are not permitted to sell or re-post them.

As of December 31, 2022, the carrying amount of fixed maturity securities loaned to third parties under our securities lending program was $152.4 million, for which we received collateral in the form of cash and securities of $88.5 million and $69.8 million, respectively. As of December 31, 2021, the carrying amount of fixed maturity securities loaned to third parties under our securities lending program was $283.7 million, for which we received collateral in the form of cash and securities of $94.8 million and $198.6 million, respectively. We had no outstanding repurchase agreements at December 31, 2022 or 2021.

The remaining contractual maturities of our securities lending agreements disaggregated by class of collateral pledged are as follows:

	December 31
	2022		2021
	Overnight and Continuous
	(in millions of dollars)
Borrowings
United States Government and Government Agencies and Authorities	$	0.3	$	0.1
State, Municipalities, and Political Subdivisions	—		0.1
Public Utilities	6.3		3.1
All Other Corporate Bonds	81.9		91.5
Total Borrowings	$	88.5	$	94.8
Gross Amount of Recognized Liability for Securities Lending Transactions	88.5		94.8
Amounts Related to Agreements Not Included in Offsetting Disclosure Contained Herein	$	—	$	—

Certain of our U.S. insurance subsidiaries are members of regional FHLBs. Membership, which requires that we purchase a minimum amount of FHLB common stock on which we receive dividends, provides access to low-cost funding. Advances received from the FHLB are used for the purchase of fixed maturity securities. Additional common stock purchases may be required, based on the amount of funds we borrow from the FHLBs. The carrying value of common stock owned, collateral posted, and advances received are as follows:

	December 31
	2022		2021
	(in millions of dollars)
Carrying Value of FHLB Common Stock	$	17.1	$	22.1
Advances from FHLB	99.1		160.9
Carrying Value of Collateral Posted to FHLB
Fixed Maturity Securities	$	527.1	$	786.1
Commercial Mortgage Loans	801.9		930.0
Total Carrying Value of Collateral Posted to FHLB	$	1,329.0	$	1,716.1

Offsetting of Financial Instruments

We enter into master netting agreements with each of our derivative's counterparties. These agreements provide for conditional rights of set-off upon the occurrence of an early termination event. An early termination event is considered a default, and it allows the non-defaulting party to offset its contracts in a loss position against any gain positions or payments due to the defaulting party. Under our agreements, default type events are defined as failure to pay or deliver as contractually agreed, misrepresentation, bankruptcy, or merger without assumption. See Note 4 for further discussion of collateral related to our derivative contracts.

We have securities lending agreements with unaffiliated financial institutions that post collateral to us in return for the use of our fixed maturity securities. A right of set-off exists that allows us to keep and apply collateral received in the event of default by the counterparty. Default within a securities lending agreement would typically occur if the counterparty failed to return the securities borrowed from us as contractually agreed. In addition, if we default by not returning collateral received, the counterparty has a right of set-off against our securities or any other amounts due to us.

Shown below are our financial instruments that either meet the accounting requirements that allow them to be offset in our balance sheets or that are subject to an enforceable master netting arrangement or similar agreement. Our accounting policy is to not offset these financial instruments in our balance sheets. Net amounts disclosed below have been reduced by the amount of collateral pledged to or received from our counterparties.

	December 31, 2022
	Gross Amount						Gross Amount Not
	of Recognized		Gross Amount		Net Amount		Offset in Balance Sheet
	Financial		Offset in		Presented in		Financial		Cash		Net
	Instruments		Balance Sheet		Balance Sheet		Instruments		Collateral		Amount
	(in millions of dollars)
Financial Assets:
Derivatives	$	89.1	$	—	$	89.1	$	(38.0)	$	(49.4)	$	1.7
Securities Lending	152.4		—		152.4		(63.9)		(88.5)		—
Total	$	241.5	$	—	$	241.5	$	(101.9)	$	(137.9)	$	1.7
Financial Liabilities:
Derivatives	$	74.0	$	—	$	74.0	$	(73.2)	$	—	$	0.8
Securities Lending	88.5		—		88.5		(88.5)		—		—
Total	$	162.5	$	—	$	162.5	$	(161.7)	$	—	$	0.8

	December 31, 2021
	Gross Amount						Gross Amount Not
	of Recognized		Gross Amount		Net Amount		Offset in Balance Sheet
	Financial		Offset in		Presented in		Financial		Cash		Net
	Instruments		Balance Sheet		Balance Sheet		Instruments		Collateral		Amount
	(in millions of dollars)
Financial Assets:
Derivatives	$	39.5	$	—	$	39.5	$	(9.8)	$	(28.4)	$	1.3
Securities Lending	283.7		—		283.7		(188.9)		(94.8)		—
Total	$	323.2	$	—	$	323.2	$	(198.7)	$	(123.2)	$	1.3
Financial Liabilities:
Derivatives	$	35.0	$	—	$	35.0	$	(34.0)	$	—	$	1.0
Securities Lending	94.8		—		94.8		(94.8)		—		—
Total	$	129.8	$	—	$	129.8	$	(128.8)	$	—	$	1.0

Net Investment Income

Net investment income reported in our consolidated statements of income is presented below.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities	$	1,849.8	$	1,888.2	$	2,164.0
Derivatives	57.8		68.6		78.7
Mortgage Loans	101.5		105.0		108.9
Policy Loans	20.0		19.7		20.0
Other Long-term Investments
Perpetual Preferred Securities1	5.0		6.9		(2.1)
Private Equity Partnerships2	110.1		165.4		19.8
Other	9.4		5.5		3.9
Short-term Investments	20.0		1.3		10.5
Gross Investment Income	2,173.6		2,260.6		2,403.7
Less Investment Expenses	39.4		35.1		30.6
Less Investment Income on Participation Fund Account Assets	12.0		12.3		12.4
Net Investment Income	$	2,122.2	$	2,213.2	$	2,360.7

1 The net unrealized gain (loss) recognized in net investment income for the year ended December 31, 2022 related to perpetual preferred securities still held at December 31, 2022 was $2.8 million. The net unrealized gain (loss) recognized in net investment income for the years ended December 31, 2021 and 2020 related to perpetual preferred securities still held at year-end was $4.4 million and $(4.6) million, respectively

2 Represents a net unrealized gain for the year ended December 31, 2022 related to private equity partnerships still held at December 31, 2022 of $124.1 million, reduced by net management fees and partnership expenses of $(14.0) million. For the years ended December 31, 2021 and 2020, the net unrealized gain related to private equity partnerships still held at year-end was $177.7 million and $29.1 million, respectively, reduced by net management fees and partnership expenses of $(12.3) million and $(9.3) million, respectively. See Note 2 for further discussion of private equity partnerships.

Investment Gain and Loss

Investment gains and losses are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities
Gross Gains on Sales1	$	2.3	$	76.2	$	1,332.8
Gross Losses on Sales	(28.8)		(11.5)		(20.3)
Credit Losses	(4.6)		(9.3)		(53.6)
Mortgage Loans and Other Invested Assets
Gross Gains on Sales	1.4		5.8		1.9
Gross Losses on Sales	—		—		(0.3)
Impairment Loss	—		—		(36.6)
Change in Allowance for Credit Losses	(1.0)		4.7		(4.6)
Embedded Derivative in Modified Coinsurance Arrangement	16.2		9.7		(17.0)
All Other Derivatives	2.6		3.1		(2.5)
Foreign Currency Transactions	(3.8)		(2.0)		(0.7)
Net Investment Gain (Loss)	$	(15.7)	$	76.7	$	1,199.1

1Gross gains on sales of fixed maturity securities for the year ended December 31, 2021 includes gains of $67.6 million as a result of the second phase of the reinsurance transaction that we completed during the first quarter of 2021. Gross gains on sales of fixed maturity securities for the year ended December 31, 2020 includes gains of $1,302.3 million as a result of the first phase of the reinsurance transaction that we completed during the fourth quarter of 2020. See Note 12 for further discussion.

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Derivative Financial Instruments

12 Months Ended

Dec. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Derivative Financial Instruments

Purpose of Derivatives

We are exposed to certain risks relating to our ongoing business operations. The primary risks managed by using derivative instruments are interest rate risk, risk related to matching duration for our assets and liabilities, foreign currency risk, credit risk, and equity risk. Historically, we have utilized current and forward interest rate swaps, current and forward currency swaps, forward benchmark interest rate locks, currency forward contracts, forward contracts on specific fixed income securities, credit default swaps, and total return swaps. Transactions hedging interest rate risk are primarily associated with our individual and group long-term care and individual and group disability products. All other product portfolios are periodically reviewed to determine if hedging strategies would be appropriate for risk management purposes. We do not use derivative financial instruments for speculative purposes.

Derivatives designated as cash flow hedges and used to reduce our exposure to interest rate and duration risk are as follows:

•Interest rate swaps were used to hedge interest rate risks and to improve the matching of assets and liabilities. An interest rate swap is an agreement in which we agree with other parties to exchange, at specified intervals, the difference between fixed rate and variable rate interest amounts. We used interest rate swaps to hedge the anticipated purchase of fixed maturity securities thereby protecting us from the potential adverse impact of declining interest rates on the associated policy reserves. We also used interest rate swaps to hedge the potential adverse impact of rising interest rates in anticipation of issuing fixed rate long-term debt.

•Forward benchmark interest rate locks are used to minimize interest rate risk associated with the anticipated purchase or disposal of fixed maturity securities or the anticipated issuance of fixed rate long term debt. A forward benchmark interest rate lock is a derivative contract without an initial investment where we and the counterparty agree to purchase or sell a specific benchmark interest rate fixed maturity bond at a future date at a pre-determined price or yield.

Derivatives designated as fair value hedges and previously used to reduce our exposure to interest rate and duration risk included:

•Interest rate swaps were used to effectively convert certain fixed rate, long-term debt into floating rate long-term debt. Under these swap agreements, we received a fixed rate of interest and paid a variable rate of interest.

Derivatives designated as either cash flow or fair value hedges and used to reduce our exposure to foreign currency risk are as follows:

•Foreign currency interest rate swaps are used to hedge the currency risk of certain foreign currency-denominated fixed maturity securities owned for portfolio diversification. Under these swap agreements, we agree to pay, at specified intervals, fixed rate foreign currency-denominated principal and interest payments in exchange for fixed rate payments in the functional currency of the operating segment.

Derivatives not designated as hedging instruments and used to reduce our exposure to foreign currency risk, credit losses on securities owned, and volatility of the underlying deferred assets in our non-qualified defined contribution plan are as follows:

•Foreign currency interest rate swaps previously designated as hedges were used to hedge the currency risk of certain foreign currency-denominated fixed maturity securities owned for portfolio diversification. These derivatives were effective hedges prior to novation to a new counterparty. In conjunction with the novation, these derivatives were de-designated as hedges. We agree to pay, at specified intervals, fixed rate foreign currency-denominated principal and interest payments in exchange for fixed rate payments in the functional currency of the operating segment. We hold offsetting swaps wherein we agree to pay fixed rate principal and interest payments in the functional currency of the operating segment in exchange for fixed rate foreign currency-denominated payments.

•Credit default swaps were used as economic hedges against credit risk but do not qualify for hedge accounting. A credit default swap is an agreement in which we agree with another party to pay, at specified intervals, a fixed-rate fee in exchange for insurance against a credit event on a specific investment. If a defined credit event occurred, our counterparty could have either paid us a net cash settlement, or we could have surrendered the specific investment to them in exchange for cash equal to the full notional amount of the swap. Credit events typically include events such as bankruptcy, failure to pay, or certain types of debt restructuring.

•Foreign currency forward contracts are used to minimize foreign currency risk. A foreign currency forward is a derivative without an initial investment where we and the counterparty agree to exchange a specific amount of currencies, at a specific exchange rate, on a specific date. We use these forward contracts to hedge the currency risk arising from foreign-currency denominated investments.

•Total Return Swaps are used to economically hedge a portion of the liability related to our non-qualified defined contribution plan. A total return swap is an agreement in which we pay a floating rate of interest to the counterparty and receive the total return on a portfolio of exchange traded funds. These swaps are cash settled on the last day of every month and the notional is re-established each month based on periodic distributions from and contributions to the plan assets.

Derivative Risks

The basic types of risks associated with derivatives are market risk (that the value of the derivative will be adversely impacted by changes in the market, primarily the change in interest and exchange rates) and credit risk (that the counterparty will not perform according to the terms of the contract). The market risk of the derivatives should generally offset the market risk associated with the hedged financial instrument or liability. To help limit the credit exposure of the derivatives, we enter into master netting agreements with our counterparties whereby contracts in a gain position can be offset against contracts in a loss position. We also typically enter into bilateral, cross-collateralization agreements with our counterparties to help limit the credit exposure of the derivatives. These agreements require the counterparty in a loss position to submit acceptable collateral with the other counterparty in the event the net loss position meets or exceeds an agreed upon amount. Credit exposure on derivatives is limited to the value of those contracts in a net gain position, including accrued interest receivable less collateral held. At December 31, 2022 and 2021, we had $1.7 million and $1.3 million credit exposure on derivatives, respectively. The table below summarizes the nature and amount of collateral received from and posted to our derivative counterparties.

	December 31
	2022		2021
	(in millions of dollars)
Carrying Value of Collateral Received from Counterparties
Cash	$	49.4	$	32.0
Carrying Value of Collateral Posted to Counterparties
Cash	$	5.1	$	—
Fixed Maturity Securities	39.6		27.6
	$	44.7	$	27.6

See Note 3 for further discussion of our master netting agreements.

The majority of our derivative instruments contain provisions that require us to maintain specified issuer credit ratings and financial strength ratings. Should our ratings fall below these specified levels, we would be in violation of the provisions, and our derivatives counterparties could terminate our contracts and request immediate payment. The aggregate fair value of all derivative instruments with credit risk-related contingent features that were in a liability position was $74.0 million and $35.0 million at December 31, 2022 and 2021, respectively.

Cash Flow Hedges

As of December 31, 2022 and 2021, we had $168.9 million and $181.3 million, respectively, notional amount of receive fixed, pay fixed, open current and forward foreign currency interest rate swaps to hedge fixed income foreign currency-denominated securities.

During 2022 we entered into $779.0 million of notional forward benchmark interest rate locks in order to hedge the anticipated purchase of fixed maturity securities. As of December 31, 2022, we had $764.0 million notional amount of forward benchmark interest rate locks.

During 2021, we entered into a $250.0 million notional forward benchmark interest rate lock in order to hedge the interest rate risk associated with the cash flows related to the early redemption of certain of our debt securities. We terminated the interest rate lock in 2021 and recognized a loss of $1.2 million that was reported as a cost related to the early retirement of debt in our income statement.

During the fourth quarter of 2020 and the first quarter of 2021, in connection with the Closed Block individual disability reinsurance transaction, we reclassified $30.7 million and $0.6 million, respectively, of deferred gains from accumulated other comprehensive income into earnings included in the net investment gain (loss) line item on our income statement. The deferred gains were related to previously terminated interest rate swaps designated as hedging instruments of fixed maturity securities in the Closed Block individual disability product line. See Note 12 for further discussion.

As of December 31, 2022, we expect to amortize approximately $35.4 million of net deferred gains on derivative instruments during the next twelve months. This amount will be reclassified from accumulated other comprehensive income into earnings and reported on the same income statement line item as the hedged item. The income statement line items that will be affected by this amortization are net investment income and interest and debt expense. Additional amounts that may be reclassified from accumulated other comprehensive income into earnings to offset the earnings impact of foreign currency translation of hedged items are not estimable.

As of December 31, 2022, we are hedging the variability of future cash flows associated with forecasted transactions through the year 2052.

Fair Value Hedges

As of December 31, 2022 and 2021, we had $557.8 million and $498.5 million notional amount of receive fixed, pay fixed, open current and forward foreign currency interest rate swaps to hedge fixed income foreign currency-denominated securities.

The following table summarizes the carrying amount of hedged assets and the related cumulative basis adjustments related to our fair value hedges:

	Carrying Amount of Hedged Assets				Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets
	December 31, 2022		December 31, 2021		December 31, 2022		December 31, 2021
	(in millions of dollars)
Fixed maturity securities:
Receive fixed functional currency interest, pay fixed foreign currency interest	$	394.4	$	466.3	$	(24.8)	$	2.0

For the years ended December 31, 2022, 2021, and 2020, $17.6 million, $16.6 million, and $(1.8) million, respectively, of the derivative instruments' gain (loss) was excluded from the assessment of hedge effectiveness. There were no instances wherein we discontinued fair value hedge accounting due to a hedged firm commitment no longer qualifying as a fair value hedge.

Derivatives not Designated as Hedging Instruments

As of December 31, 2022 and 2021, we held $132.0 million and $148.2 million, respectively, notional amount of receive fixed, pay fixed, foreign currency interest rate swaps. These derivatives are not designated as hedges, and as such, changes in fair value related to these derivatives are reported in earnings as a component of net investment gain or loss.

As of December 31, 2022, we held no single name credit default swaps. As of December 31, 2021, we held $11.6 million, respectively, notional amount of single name credit default swaps. We entered into these swaps in order to mitigate the credit risk associated with specific securities owned.

As of December 31, 2022 and 2021, we held $54.3 million and $41.7 million, respectively, notional amount of foreign currency forwards to mitigate the foreign currency risk associated with specific securities owned.

As of December 31, 2022 and 2021, we held $76.9 million and $89.2 million, respectively, notional amount of total return swaps to mitigate the volatility associated with changes in the fair value of the underlying notional assets in our non-qualified defined contribution plan. This derivative is an economic hedge not designated as a hedging instrument, and changes in fair value are reported as a component of other expenses in our income statement.

We have an embedded derivative in a modified coinsurance arrangement for which we include in our net investment gains and losses a calculation intended to estimate the value of the option of our reinsurance counterparty to cancel the reinsurance contract with us. However, neither party can unilaterally terminate the reinsurance agreement except in extreme circumstances resulting from regulatory supervision, delinquency proceedings, or other direct regulatory action. Cash settlements or collateral related to this embedded derivative are not required at any time during the reinsurance contract or at termination of the reinsurance contract. There are no credit-related counterparty triggers, and any accumulated embedded derivative gain or loss reduces to zero over time as the reinsured business winds down.

Locations and Amounts of Derivative Financial Instruments

The following tables summarize the notional amounts and fair values of derivative financial instruments, as reported in our consolidated balance sheets. Derivative assets are included in other long-term investments, while derivative liabilities are included in other liabilities within our consolidated balance sheets. The notional amounts represent the basis upon which our counterparty pay and receive amounts are calculated.

	December 31, 2022
			Derivative Assets		Derivative Liabilities
	Notional Amount		Fair Value		Fair Value
	(in millions of dollars)
Designated as Hedging Instruments
Cash Flow Hedges
Forward Benchmark Interest Rate Locks	$	764.0	$	1.6	$	48.4
Foreign Currency Interest Rate Swaps	168.9		17.5		3.1
Total Cash Flow Hedges	932.9		19.1		51.5
Fair Value Hedges
Foreign Currency Interest Rate Swaps	557.8		66.0		5.4
Total Designated as Hedging Instruments	$	1,490.7	$	85.1	$	56.9
Not Designated as Hedging Instruments
Foreign Currency Forwards	$	54.3	$	4.0	$	0.1
Foreign Currency Interest Rate Swaps	132.0		—		17.0
Total Return Swaps	76.9		—		—
Embedded Derivative in Modified Coinsurance Arrangement	—		—		13.9
Total Not Designated as Hedging Instruments	$	263.2	$	4.0	$	31.0
Total Derivatives	$	1,753.9	$	89.1	$	87.9

	December 31, 2021
			Derivative Assets		Derivative Liabilities
	Notional Amount		Fair Value		Fair Value
	(in millions of dollars)
Designated as Hedging Instruments
Cash Flow Hedges
Foreign Currency Interest Rate Swaps	$	181.3	$	16.2	$	7.0
Fair Value Hedges
Foreign Currency Interest Rate Swaps	498.5		21.9		5.7
Total Designated as Hedging Instruments	$	679.8	$	38.1	$	12.7
Not Designated as Hedging Instruments
Credit Default Swaps	$	11.6	$	—	$	—
Foreign Currency Forwards	41.7		—		—
Foreign Currency Interest Rate Swaps	148.2		1.4		22.3
Total Return Swaps	89.2		—		—
Embedded Derivative in Modified Coinsurance Arrangement	—		—		30.1
Total Not Designated as Hedging Instruments	$	290.7	$	1.4	$	52.4
Total Derivatives	$	970.5	$	39.5	$	65.1

The following tables summarize the location of gains and losses of derivative financial instruments designated as hedging instruments, as reported in our consolidated statements of income.

	Year Ended December 31, 2022
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,122.2	$	(15.7)	$	188.5
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	200.0		—		2.9
Derivatives Designated as Hedging Instruments	51.0		—		—
Foreign Exchange Contracts:
Hedged items	12.3		(2.3)		—
Derivatives Designated as Hedging Instruments	(0.8)		1.8		—
Forward Benchmark Interest Rate Locks:
Hedged items	0.5		—		—
Gain (Loss) on Fair Value Hedging Relationships
Foreign Exchange Contracts:
Hedged items	11.6		(26.8)		—
Derivatives Designated as Hedging Instruments	7.3		26.8		—

	Year Ended December 31, 2021
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,213.2	$	76.7	$	185.0
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	220.4		2.7		29.2
Derivatives Designated as Hedging Instruments	64.6		2.0		5.0
Foreign Exchange Contracts:
Hedged items	13.0		(0.1)		—
Derivatives Designated as Hedging Instruments	1.8		(0.1)		—
Gain (Loss) on Fair Value Hedging Relationships
Foreign Exchange Contracts:
Hedged items	9.8		(22.3)		—
Derivatives Designated as Hedging Instruments	4.6		22.3		—

	Year Ended December 31, 2020
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,360.7	$	1,199.1	$	188.2
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	286.1		397.7		29.2
Derivatives Designated as Hedging Instruments	75.9		32.0		1.7
Foreign Exchange Contracts:
Hedged items	12.1		(0.1)		—
Derivatives Designated as Hedging Instruments	2.5		0.1		—
Gain (Loss) on Fair Value Hedging Relationships
Interest Rate Swaps:
Hedged items	—		(0.6)		10.1
Derivatives Designated as Hedging Instruments	—		0.6		(0.9)
Foreign Exchange Contracts:
Hedged items	7.1		23.3		—
Derivatives Designated as Hedging Instruments	2.8		(23.3)		—

The following table summarizes the location of gains and losses of derivative financial instruments designated as cash flow hedging instruments, as reported in our consolidated statements of comprehensive income (loss).

		Year Ended December 31
		2022		2021		2020
		(in millions of dollars)
Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives
Forwards		$	(49.8)	$	(0.6)	$	—
Foreign Exchange Contracts		7.4		2.2		(5.4)
	Total	$	(42.4)	$	1.6	$	(5.4)

The following table summarizes the location of gains and losses on our derivatives not designated as hedging instruments, as reported in our consolidated statements of income.

		Year Ended December 31
		2022		2021		2020
		(in millions of dollars)
Net Investment Gain (Loss)
	Credit Default Swaps	$	—	$	(0.3)	$	(0.5)
	Foreign Exchange Contracts	2.7		3.4		(2.0)
	Embedded Derivative in Modified Coinsurance Arrangement	16.2		9.7		(17.0)
	Total	$	18.9	$	12.8	$	(19.5)
Other Expenses
	(Gain) Loss on Total Return Swaps	$	18.9	$	(8.5)	$	—

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Accumulated Other Comprehensive Income (Loss)

12 Months Ended

Dec. 31, 2022

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Accumulated Other Comprehensive Income (Loss)

Components of our accumulated other comprehensive income (loss), after tax, and related changes are as follows:

	Net Unrealized Gain (Loss) on Securities		Net Gain (Loss) on Hedges		Foreign Currency Translation Adjustment		Unrecognized Pension and Postretirement Benefit Costs		Total
	(in millions of dollars)
Balances at December 31, 2019	$	615.9	$	187.8	$	(281.6)	$	(484.8)	$	37.3
Other Comprehensive Income (Loss) Before Reclassifications	405.6		(5.7)		20.3		(60.8)		359.4
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	46.2		(84.3)		—		15.6		(22.5)
Net Other Comprehensive Income (Loss)	451.8		(90.0)		20.3		(45.2)		336.9
Balances at December 31, 2020	1,067.7		97.8		(261.3)		(530.0)		374.2
Other Comprehensive Income (Loss) Before Reclassifications	(169.9)		14.7		(12.6)		116.3		(51.5)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	64.4		(50.7)		—		17.7		31.4
Net Other Comprehensive Income (Loss)	(105.5)		(36.0)		(12.6)		134.0		(20.1)
Balances at December 31, 2021	962.2		61.8		(273.9)		(396.0)		354.1
Other Comprehensive Income (Loss) Before Reclassifications	(3,009.2)		(30.4)		(115.2)		49.7		(3,105.1)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	23.2		(41.0)		—		12.2		(5.6)
Net Other Comprehensive Income (Loss)	(2,986.0)		(71.4)		(115.2)		61.9		(3,110.7)
Balances at December 31, 2022	$	(2,023.8)	$	(9.6)	$	(389.1)	$	(334.1)	$	(2,756.6)

The net unrealized gain (loss) on securities consists of the following components:

	December 31								Change for the Year Ended December 31
	2022		2021		2020		2019		2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities	$	(2,984.4)	$	5,949.3	$	7,597.6	$	6,364.4	$	(8,933.7)	$	(1,648.3)	$	1,233.2
Deferred Acquisition Costs	11.3		(70.4)		(85.1)		(62.7)		81.7		14.7		(22.4)
Reserves for Future Policy and Contract Benefits	566.7		(4,659.5)		(6,225.6)		(5,803.1)		5,226.2		1,566.1		(422.5)
Reinsurance Recoverable	(18.1)		132.1		200.2		424.7		(150.2)		(68.1)		(224.5)
Income Tax	400.7		(389.3)		(419.4)		(307.4)		790.0		30.1		(112.0)
Total	$	(2,023.8)	$	962.2	$	1,067.7	$	615.9	$	(2,986.0)	$	(105.5)	$	451.8

Amounts reclassified from accumulated other comprehensive income (loss) were recognized in our consolidated statements of income as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Net Unrealized Loss on Securities
Net Investment Gain (Loss)
Gain (Loss) on Sales on Securities	$	(24.8)	$	60.8	$	1,279.7
Credit Losses on Fixed Maturity Securities	(4.6)		(9.3)		(53.6)
Loss on Benefits and Change in Reserves for Future Benefits	—		(133.1)		(1,284.5)
	(29.4)		(81.6)		(58.4)
Income Tax Benefit	(6.2)		(17.2)		(12.2)
Total	$	(23.2)	$	(64.4)	$	(46.2)
Net Gain (Loss) on Hedges
Net Investment Income
Gain on Interest Rate Swaps and Forwards	$	51.1	$	60.6	$	74.1
Gain (Loss) on Foreign Exchange Contracts	(1.0)		1.7		2.0
Net Investment Gain (Loss)
Gain on Interest Rate Swaps	—		2.0		32.0
Gain (Loss) on Foreign Exchange Contracts	1.8		(0.1)		0.1
Interest and Debt Expense
Loss on Interest Rate Swaps	—		—		(1.5)
	51.9		64.2		106.7
Income Tax Expense	10.9		13.5		22.4
Total	$	41.0	$	50.7	$	84.3
Unrecognized Pension and Postretirement Benefit Costs
Other Expenses
Amortization of Net Actuarial Loss	$	(15.7)	$	(22.6)	$	(19.8)
Amortization of Prior Service Credit	0.2		0.2		0.1
Curtailment Gain	—		—		(0.1)
	(15.5)		(22.4)		(19.8)
Income Tax Benefit	(3.3)		(4.7)		(4.2)
Total	$	(12.2)	$	(17.7)	$	(15.6)

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Liability for Unpaid Claims and Claim Adjustment Expenses

12 Months Ended

Dec. 31, 2022

Insurance [Abstract]

Liability for Unpaid Claims and Claims Adjustment Expenses Disclosure

Changes in the liability for unpaid claims and claim adjustment expenses are as follows:

	2022		2021		2020
	(in millions of dollars)
Balance at January 1	$	23,664.7	$	24,180.2	$	23,076.7
Less Reinsurance Recoverable	8,697.8		8,378.9		2,246.8
Net Balance at January 1	14,966.9		15,801.3		20,829.9
Incurred Related to
Current Year	6,721.3		7,252.6		6,327.8
Prior Years
Interest	595.6		683.4		997.8
All Other Incurred	(646.0)		(719.5)		878.7
Foreign Currency	(235.9)		(23.4)		65.9
Total Incurred	6,435.0		7,193.1		8,270.2
Paid Related to
Current Year	(3,062.9)		(3,263.4)		(2,727.0)
Prior Years	(3,786.0)		(3,774.1)		(4,430.3)
Total Paid	(6,848.9)		(7,037.5)		(7,157.3)
Reserves Ceded Pursuant to Reinsurance Transaction	—		(990.0)		(6,141.5)
Net Balance at December 31	14,553.0		14,966.9		15,801.3
Plus Reinsurance Recoverable	8,279.8		8,697.8		8,378.9
Balance at December 31	$	22,832.8	$	23,664.7	$	24,180.2

The majority of the net balances are related to disability claims with long-tail payouts on which interest earned on assets backing liabilities is an integral part of pricing and reserving. Interest accrued on prior year reserves has been calculated on the opening reserve balance less one-half of the year’s claim payments relative to prior years at our average reserve discount rate for the respective periods.

"Incurred Related to Prior Years - All Other Incurred" shown in the preceding chart reflects the current year development of the prior year unpaid claims and claim adjustment expenses. For all years presented this line item includes reserve assumption updates as discussed in the following paragraphs. For 2021 and 2020, this amount includes the increase in benefits and change in reserves for future benefits resulting from the realization of previously unrealized investment gains and losses as a result of both phases of the Closed Block individual disability reinsurance transaction. Excluding the reserve assumption updates and impacts from the reinsurance transaction, the variability exhibited year over year is primarily caused by the level of claim resolutions in the period relative to the long-term expectations reflected in the reserves, primarily in our Unum US group long-term disability and Closed Block long-term care product lines. Our claim resolution rate assumption used in determining reserves is our expectation of the resolution rate we will experience over the life of the block of business and will vary from actual experience in any one period, both favorably and unfavorably.

Reserve Assumption Updates

During 2022, we completed our annual review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during 2022, we updated our reserve assumptions to reflect our current estimate of future benefits obligations and determined that our claim reserves in our Unum US group long-term disability product line and our waiver of premium reserves for our Unum US group life product line should be reduced by $121.0 million and $34.0 million, respectively, due primarily to sustained improvement in claim recovery trends since our last assumption update, partially offset by lower social security benefit offsets for our group long-term disability product line. As a result, a reduction of approximately $155.0 million, which can be primarily attributed to prior year incurred claims, impacts the results shown in the preceding chart. We also increased our claim reserves for the reinsured portion of our Closed Block individual disability product line by $193.9 million resulting primarily from updates to mortality assumptions for the advanced age portion of our claimant population. This increase is entirely related to the block that was ceded as a part of the Closed Block individual disability reinsurance transaction with Commonwealth Annuity and Life Insurance Company (Commonwealth). As a result, the increase in the Closed Block individual disability claim reserves had no impact on the net activity shown in the preceding chart.

During 2021, we completed our annual review of policy and claim reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during 2021, we updated our reserve assumptions and determined that our claim reserves should be reduced by $215.0 million in our Unum US group long-term disability product line due primarily to sustained improvement in claim recovery trends since our last assumption update. We also increased our claim reserves for our Closed Block long-term care and individual disability product lines by $2.1 million and $6.4 million, respectively, to reflect our current estimate of future benefit obligations. As a result, a net reduction of approximately $206.5 million, which can be primarily attributed to prior year incurred claims, impacts the results shown in the preceding chart. We also increased policy reserves in our Closed Block group pension product line by $25.1 million as a result of this review which did not affect the results shown in the preceding chart.

During 2020, we completed our annual review of policy reserve adequacy, which incorporated our most recent experience and included a review of all material assumptions. Based on our analysis, during 2020, we updated our interest rate and premium rate increase reserve assumptions and determined that our Closed Block long-term care policy and claim reserves should be increased by $151.5 million, of which $7.0 million was related to our liability for unpaid claims and claims adjustment expenses, which can be primarily attributed to prior year incurred claims, thereby impacting the results shown in the preceding chart. We also increased policy reserves in our Closed Block group pension product line by $17.5 million as a result of this review which did not affect the results shown in the preceding chart.

Closed Block Individual Disability Reinsurance Transaction

In connection with the first phase of the Closed Block individual disability reinsurance transaction that closed in December 2020, we recorded a reinsurance recoverable of $6,141.5 million representing the ceded reserves related to the cohort of policies on claim status as of July 1, 2020 (DLR cohort) and an increase in benefits and change in reserves for future benefits of $1,284.5 million resulting from the realization of previously unrealized investment gains and losses recorded in accumulated other comprehensive income (loss). In connection with the second phase of the Closed Block individual disability transaction that closed in March 2021, we recorded a reinsurance recoverable of $990.0 million representing the ceded reserves related to the cohort of policies on claim status as of January 1, 2021 and an increase in benefits and change in reserves for future benefits of $133.1 million resulting from the realization of previously unrealized investment gains and losses recorded in accumulated other comprehensive income (loss). These impacts are reflected in the chart shown above and the reconciliation shown below. See Note 12 for further discussion regarding the total impacts of the Closed Block individual disability reinsurance transaction.

Reconciliation

A reconciliation of policy and contract benefits and reserves for future policy and contract benefits as reported in our consolidated balance sheets to the liability for unpaid claims and claim adjustment expenses is as follows:

	December 31
	2022		2021		2020
	(in millions of dollars)
Policy and Contract Benefits	$	1,839.8	$	1,907.7	$	1,855.4
Reserves for Future Policy and Contract Benefits	42,330.2		48,007.5		49,653.0
Total	44,170.0		49,915.2		51,508.4
Less:
Life Reserves for Future Policy and Contract Benefits	8,428.5		8,457.1		8,371.7
Accident and Health Active Life Reserves	13,475.4		13,133.9		12,730.9
Adjustment Related to Unrealized Investment Gains (Losses)	(566.7)		4,659.5		6,225.6
Liability for Unpaid Claims and Claim Adjustment Expenses	$	22,832.8	$	23,664.7	$	24,180.2

The adjustment related to unrealized investment gains and losses reflects the changes that would be necessary to policyholder liabilities if the unrealized investment gains and losses related to the corresponding available-for-sale securities had been realized. Changes in this adjustment are reported as a component of other comprehensive income or loss.

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Income Tax

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Income Tax Disclosure

Total income tax expense (benefit) is allocated as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Net Income	$	317.2	$	238.8	$	171.0
Stockholders' Equity - Accumulated Other Comprehensive Income (Loss)
Change in Net Unrealized Gain (Loss) on Securities Before Adjustment	(1,890.8)		(346.9)		250.2
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance	1,100.8		316.8		(138.2)
Change in Net Gain (Loss) on Hedges	(19.2)		(9.8)		(23.8)
Change in Foreign Currency Translation Adjustment	(0.1)		4.2		(4.3)
Change in Unrecognized Pension and Postretirement Benefit Costs	18.9		42.1		(34.8)
Total	$	(473.2)	$	245.2	$	220.1

A reconciliation of the income tax provision at the U.S. federal statutory rate to the income tax rate as reported in our consolidated statements of income is as follows:

	Year Ended December 31
	2022		2021		2020
Statutory Income Tax	21.0	%	21.0	%	21.0	%
Net Operating Loss Carryback	—		(0.7)		(3.8)
Tax Exempt Income	(1.1)		(1.1)		(0.8)
Tax Credits	(0.3)		(0.9)		(1.3)
Policyholder Reserves	(1.9)		2.4		0.7
Other Items, Net	1.7		1.8		1.9
Effective Tax	19.4	%	22.5	%	17.7	%

Our net deferred tax asset (liability) consists of the following.

	December 31
	2022		2021
	(in millions of dollars)
Deferred Tax Asset
Invested Assets	$	664.9	$	—
Reserves	—		889.7
Employee Benefits	158.3		176.6
Other	34.4		57.5
Gross Deferred Tax Asset	857.6		1,123.8
Less: Valuation Allowance	10.3		12.7
Net Deferred Tax Asset	847.3		1,111.1
Deferred Tax Liability
Deferred Acquisition Costs	113.1		134.9
Fixed Assets	48.9		71.1
Invested Assets	—		1,144.9
Reserves	43.2		—
Cost of Reinsurance	156.8		171.6
Other	44.7		47.0
Gross Deferred Tax Liability	406.7		1,569.5
Net Deferred Tax Asset (Liability)	$	440.6	$	(458.4)

Our consolidated statements of income include amounts subject to both domestic and foreign taxation. The income and related tax expense (benefit) are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Income Before Tax
Domestic	$	1,492.8	$	957.0	$	924.7
Foreign	138.6		106.0		39.3
Total	$	1,631.4	$	1,063.0	$	964.0
Current Tax Expense (Benefit)
Federal	$	306.5	$	180.7	$	(98.4)
State and Local	12.7		2.6		1.5
Foreign	154.3		29.5		(19.7)
Total	473.5		212.8		(116.6)
Deferred Tax Expense (Benefit)
Federal	20.9		13.3		250.5
State and Local	1.1		(2.2)		1.0
Foreign	(178.3)		14.9		36.1
Total	(156.3)		26.0		287.6
Total Tax Expense	$	317.2	$	238.8	$	171.0

On June 10, 2021, the Finance Act 2021 was enacted, resulting in a U.K. tax increase from 19 percent to 25 percent, effective April 1, 2023, which resulted in $24.2 million of additional tax expense in operating earnings for the revaluation of our deferred tax assets and liabilities in 2021. On July 22, 2020, the Finance Act 2020 was enacted, resulting in a U.K. tax rate increase from 17 percent to 19 percent, retroactively effective April 1, 2020, which resulted in $9.3 million of additional tax expense for the revaluation of our deferred tax assets and liabilities in 2020. In addition, we recorded a tax benefit of $36.5 million in 2020 for tax losses that were carried back to a tax year in which the U.S. statutory tax rate was 35 percent pursuant to the Coronavirus Aid, Relief, and Economic Security Act (CARES Act).

As of December 31, 2022, our plans for future repatriations of cash from our foreign subsidiaries can include no more than the amount of capital above that which is required by U.K. regulatory capital requirements.  The remainder of our investment in our foreign subsidiaries is indefinitely reinvested.

Our consolidated statements of income include the following changes in unrecognized tax benefits.

	December 31
	2022		2021		2020
	(in millions of dollars)
Balance at Beginning of Year	$	198.8	$	219.7	$	241.0
Decreases for Tax Positions Related to Prior Years	(21.0)		(20.9)		(21.0)
Lapse of the Applicable Statute of Limitations	(0.4)		—		(0.3)
Balance at End of Year	177.4		198.8		219.7
Less Tax Attributable to Temporary Items Included Above	(63.5)		(84.7)		(105.9)
Total Unrecognized Tax Benefits That if Recognized Would Affect the Effective Tax Rate	$	113.9	$	114.1	$	113.8

In 2018, we recorded $261.1 million gross unrecognized tax benefits for a policyholder reserves position taken on our 2017 federal tax return, which if recognized, would decrease our tax expense by $112.9 million. The balances of unrecognized tax benefits for which the ultimate deductibility is highly certain but for which there is uncertainty about the timing of such deductibility are $63.5 million at December 31, 2022, $84.7 million at December 31, 2021, and $105.9 million at December 31, 2020. It is reasonably possible that this item could reverse in the next 12 months following review by the IRS. We recognize interest expense and penalties, if applicable, related to unrecognized tax benefits in tax expense. We recognized $7.8 million, $5.5 million, and $7.8 million of interest expense related to unrecognized tax benefits during 2022, 2021, and 2020, respectively. The liability for net interest expense on uncertain tax positions was approximately $34.0 million, $26.2 million, and $20.6 million as of December 31, 2022, 2021, and 2020, respectively.

We file federal and state income tax returns in the United States and in foreign jurisdictions. Tax year 2017 and tax years subsequent to 2018 remain subject to examination by the IRS. All major foreign jurisdictions remain subject to examination for tax years subsequent to 2020 with the exception of Poland for which tax years subsequent to 2016 remain subject to examination. We believe sufficient provision has been made for all potential adjustments for years that are not closed by the statute of limitations in all major tax jurisdictions and that any such adjustments would not have a material adverse effect on our financial position, liquidity, or results of operations.

We file state income tax returns in nearly every state in the United States. Tax years subsequent to 2016 remain subject to examination depending on the statute of limitation established by the various states, which is generally three to four years.

As of December 31, 2022, we have no federal net operating loss or capital loss carryforwards. We have net operating loss carryforwards for state and local income tax of approximately $187.6 million, most of which is expected to expire unused between 2023 and 2042.

We record valuation allowances to reduce deferred tax assets to the amount that is more likely than not to be realized.  Our valuation allowance was $10.3 million and $12.7 million at December 31, 2022 and 2021, respectively, the majority of which related to our cumulative deferred state income tax benefits. The de minimis remaining amount of our valuation allowance relates to unrealized tax losses on buildings which we own and occupy in the U.K. We recorded a decrease in our valuation allowance of $2.4 million during 2022 and a decrease of $1.8 million in 2021, primarily in other comprehensive income.

Total income taxes paid during 2022 were $375 million. Total income taxes refunded during 2021 were $51 million. Total income taxes paid during 2020 were $200 million.

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Debt

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Debt

Debt consists of the following:

			December 31
			2022		2021
	Interest Rates	Maturities	(in millions of dollars)
Outstanding Principal
Senior Notes issued 1998	6.750 - 7.250%	2028	$	335.8	$	335.8
Senior Notes issued 2002	7.375%	2032	39.5		39.5
Senior Notes issued 2012 and 2016	5.750%	2042	500.0		500.0
Senior Notes issued 2014	4.000%	2024	—		350.0
Senior Notes issued 2015	3.875%	2025	275.0		275.0
Senior Notes issued 2019	4.000%	2029	400.0		400.0
Senior Notes issued 2019	4.500%	2049	450.0		450.0
Senior Notes issued 2021	4.125%	2051	600.0		600.0
Medium-term Notes issued 1990 - 1996	7.000 - 7.190%	2023 - 2028	18.5		20.5
Junior Subordinated Debt Securities issued 1998	7.405%	2038	189.7		203.7
Junior Subordinated Debt Securities issued 2018	6.250%	2058	300.0		300.0
Term Loan issued 2022	Variable	2027	350.0		—
Less:
Unamortized Net Premium			2.5		2.3
Unamortized Debt Issuance Costs			(33.2)		(34.6)
Total Long-term Debt			$	3,427.8	$	3,442.2
Short-term Debt
Medium-term Notes Issued 1990	7.000%	2023	2.0		—
Total Debt			$	3,429.8	$	3,442.2

Long-term debt is comprised of our unsecured notes, which consist of our senior notes, medium-term notes, and term loan facility, and rank highest in priority, followed by our junior subordinated debt securities. The senior notes are callable and may be redeemed, in whole or in part, at any time. The term loan facility is callable and may be redeemed at par at any time. The medium-term notes are non-callable and the junior subordinated debt securities are callable under limited, specified circumstances.

The aggregate contractual principal maturities are $2.0 million in 2023, $275.0 million in 2025, $350.0 million in 2027 and $2,833.5 million thereafter.

Unsecured Notes

In August 2022, we redeemed $350.0 million aggregate principal amount of our 4.000% senior notes due 2024, for which we incurred costs of $3.0 million and has been recorded within cost related to the early retirement of debt in the consolidated statements of income and is included within our Corporate segment.

In June 2021, we issued $600.0 million of 4.125% senior notes due 2051. The notes are callable at or above par and rank equally in the right of payment with all of our other unsecured and unsubordinated debt.

In September 2020, our $400.0 million 5.625% senior unsecured notes matured.

In May 2020, we issued $500.0 million of 4.500% senior notes due 2025. In June 2021, we purchased and retired these senior notes, for which we incurred costs of $67.3 million and has been recorded within cost related to the early retirement of debt in the consolidated statements of income and is included within our Corporate segment.

Term Loan Facility

In August 2022, we entered into a five-year $350.0 million senior unsecured delayed draw term loan facility with a syndicate of lenders. Also in August 2022 , we drew the entire amount of the term loan facility, which is scheduled to mature in August 2027. Amounts due under the term loan facility incur interest based on the prime rate, the federal funds rate, or the Secured Overnight Financing Rate (SOFR). The proceeds from the term loan facility were used to redeem $350.0 million aggregate principal amount of our 4.000% senior notes due 2024.

Borrowings under the term loan facility are subject to financial covenants, negative covenants, and events of default that are customary. The term loan facility includes financial covenants based on our leverage ratio and consolidated net worth.

Senior Secured Notes

In 2007, Northwind Holdings, LLC (Northwind Holdings), a wholly-owned subsidiary of Unum Group, issued $800.0 million of insured, senior secured notes, bearing interest at a floating rate equal to the three month LIBOR plus 0.78% (the Northwind notes) in a private offering.

Northwind Holdings made periodic principal payments on the Northwind notes of $45.0 million in 2020. In December 2020, Northwind Holdings redeemed the remaining $35.0 million of principal on the Northwind notes, and was released of any contractual collateral requirements.

Fair Value Hedges

As of December 31, 2019, we had $250.0 million notional amount of an interest rate swap which effectively converted certain of our unsecured senior notes into floating rate debt. Under this agreement, we received a fixed rate of interest and paid a variable rate of interest, based off of three-month LIBOR. During 2020, the $250.0 million notional amount of the interest rate swap matured in conjunction with the maturity of the hedged debt. See Note 4 for further information on the interest rate swap.

Junior Subordinated Debt Securities

In 1998, Provident Financing Trust I (the Trust), a 100 percent-owned finance subsidiary of Unum Group, issued $300.0 million of 7.405% capital securities due 2038 in a public offering. These capital securities are fully and unconditionally guaranteed by Unum Group, have a liquidation value of $1,000 per capital security, and have a mandatory redemption feature under certain circumstances. In connection with the capital securities offering, Unum Group issued to the Trust 7.405% junior subordinated deferrable interest debentures due 2038. The Trust is a variable interest entity of which Unum Group is not the primary beneficiary. Accordingly, the capital securities issued by the Trust are not included in our consolidated financial statements and our liability represents the junior subordinated debt securities owed to the trust which is recorded in long-term debt. The sole assets of the Trust are the junior subordinated debt securities. The retirement of any liquidation amount regarding the capital securities by the Trust results in a corresponding retirement of principal amount of the junior subordinated debt securities.

In September 2022, pursuant to privately negotiated transactions, we purchased, and the Trust retired, $14.0 million aggregate liquidation amount of the Trust's 7.405% capital securities due 2038, which resulted in the reduction of a corresponding principal amount of our 7.405% junior subordinated debt securities due 2038 then held by the Trust. We incurred costs of $1.2 million related to the early retirement of the junior subordinated debt securities.

Interest Paid

Interest paid on long-term and short-term debt and related securities during 2022, 2021, and 2020 was $172.9 million, $181.6 million, and $178.1 million, respectively.

Credit Facilities

In April 2022, we amended and restated our existing credit agreement providing for a five-year $500.0 million senior unsecured revolving credit facility with a syndicate of lenders. The credit facility, which was previously set to expire in April 2024, was extended through April 2027. We may request that the lenders’ aggregate commitments of $500.0 million under the facility be increased by up to an additional $200.0 million. Certain of our traditional U.S. life insurance subsidiaries, Unum Life Insurance Company of America (Unum America), Provident Life and Accident Insurance Company (Provident), and Colonial Life & Accident Insurance Company, joined the agreement and may borrow under the credit facility, and we can elect to add additional insurance subsidiaries to the facility at any later date. Any obligation of a subsidiary under the credit facility is several only and not joint and is subject to an unconditional guarantee by Unum Group. We may also request, on up to two occasions, that the lenders' commitment termination dates be extended by one year. The credit facility also provides for the issuance of letters of credit subject to certain terms and limitations. The credit facility provides for borrowings at an interest rate based on the prime rate, the federal funds rate or the SOFR. At December 31, 2022, there were no borrowed amounts outstanding under the credit facility and letters of credit totaling $0.4 million had been issued.

In the third quarter of 2021, we terminated our three-year, $100.0 million unsecured revolving credit facility, which was originally set to expire in April 2022. There were no letters of credit issued from the credit facility and there were no borrowed amounts outstanding at the time of termination. Also in the third quarter of 2021, we entered into a new five-year, £75 million unsecured standby letter of credit facility with the same syndicate of lenders, pursuant to which a syndicated letter of credit was issued in favor of Unum Limited (as beneficiary), our U.K. insurance subsidiary, and is available for drawings up to £75 million until its scheduled expiration in July 2026. The credit facility provides for borrowings at an interest rate based either on the prime rate or federal funds rate. No amounts have been drawn on the letter of credit. If drawings are made in the future, we may elect to borrow such amounts from the lenders pursuant to term loans made under the credit facility.

Borrowings under the credit facilities are subject to financial covenants, negative covenants, and events of default that are customary. The two primary financial covenants include limitations based on our leverage ratio and consolidated net worth. We are also subject to covenants that limit subsidiary indebtedness.

Facility Agreement for Contingent Issuance of Senior Notes

During November 2021, we entered into a 20-year facility agreement with a Delaware trust in connection with the sale by the trust of $400.0 million of pre-capitalized trust securities in a Rule 144A private placement. The trust invested the proceeds from the sale of the trust securities in a portfolio of principal and interest strips of U.S. Treasury securities. The facility agreement provides us the right to issue and sell to the trust, on one or more occasions, up to an aggregate principal amount outstanding at any one time of $400.0 million of our 4.046% senior notes which would be due August 15, 2041 in exchange for U.S. Treasury securities held by the trust. These senior notes will not be issued unless and until the issuance right is exercised. In return, we will pay a semi-annual facility fee to the trust at a rate of 2.225% per year on the unexercised portion of the maximum amount of senior notes that we could issue and sell to the trust and we will reimburse the trust for its expenses. We may also direct the trust to grant the right to exercise the issuance right with respect to all or a designated amount of the senior notes to one or more assignees (who are our consolidated subsidiaries or persons to whom we have an obligation).

The issuance right will be exercised automatically in full upon our failure to make certain payments to the trust, such as paying the facility fee or reimbursing the trust for its expenses, if the failure to pay is not cured within 30 days, or upon certain bankruptcy events involving the company. We are also required to exercise the issuance right in full if our consolidated stockholders’ equity, excluding accumulated other comprehensive income, falls below $2.0 billion, subject to adjustment from time to time in certain cases, and upon certain other events described in the facility agreement.

Prior to any involuntary exercise of the issuance right, we have the right to repurchase any or all of the 4.046% senior notes then held by the trust in exchange for U.S. Treasury securities. We may redeem any outstanding 4.046% senior notes, in whole or in part, prior to their maturity. Prior to February 15, 2041, the redemption price will equal the greater of par or a make-whole redemption price. On or after February 15, 2041, any outstanding 4.046% senior notes may be redeemed at par.

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Employee Benefit Plans

12 Months Ended

Dec. 31, 2022

Retirement Benefits [Abstract]

Pension and Other Postretirement Benefits Disclosure

Defined Benefit Pension and Other Postretirement Benefit (OPEB) Plans

We sponsor several defined benefit pension and OPEB plans for our employees, including non-qualified pension plans. The U.S. qualified and non-qualified defined benefit pension plans comprise the majority of our total benefit obligation and benefit cost. We maintain a separate defined benefit plan for eligible employees in our U.K. operation. The U.S. defined benefit pension plans were closed to new entrants on December 31, 2013, the OPEB plan was closed to new entrants on December 31, 2012, and the U.K. plan was closed to new entrants on December 31, 2002.

Amortization Period of Actuarial Gain or Loss and Prior Service Cost or Credit

Because all participants in the U.S. and U.K. pension plans are considered inactive, we amortize the net actuarial gain or loss and prior service credit or cost for these plans over the average remaining life expectancy of the plans. As of December 31, 2022, the estimate of the average remaining life expectancy of the plans was approximately 24 years for the U.S. plan and 28 years for the U.K. plan. For the OPEB plan, we amortize the net actuarial gain or loss and prior service credit or cost for this plan over the average remaining future working lifetime for active participants in the plan. As of December 31, 2022, the estimate of the average remaining future working lifetime was approximately 2 years for the OPEB plan.

The following table provides the changes in the benefit obligation and fair value of plan assets and the funded status of the plans.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Change in Benefit Obligation
Benefit Obligation at Beginning of Year	$	2,207.5	$	2,277.2	$	278.3	$	300.0	$	110.3	$	120.5
Service Cost	7.7		9.6		—		—		—		—
Interest Cost	67.2		65.0		5.0		4.2		3.0		3.0
Plan Participant Contributions	—		—		—		—		0.1		0.1
Actuarial Gain (1)	(604.1)		(57.9)		(92.4)		(18.0)		(19.4)		(3.0)
Benefits and Expenses Paid	(92.8)		(86.4)		(5.4)		(5.2)		(10.1)		(10.3)
Change in Foreign Exchange Rates	—		—		(27.6)		(2.7)		—		—
Benefit Obligation at End of Year	$	1,585.5	$	2,207.5	$	157.9	$	278.3	$	83.9	$	110.3
Accumulated Benefit Obligation at December 31	$	1,585.5	$	2,207.5	$	158.0	$	276.5	N/A		N/A
Change in Fair Value of Plan Assets
Fair Value of Plan Assets at Beginning of Year	$	1,801.7	$	1,710.9	$	303.7	$	294.1	$	9.0	$	9.3
Actual Return on Plan Assets	(410.6)		167.6		(128.4)		18.0		0.1		0.1
Employer Contributions	10.0		9.6		—		—		9.4		9.8
Plan Participant Contributions	—		—		—		—		0.1		0.1
Benefits and Expenses Paid	(92.8)		(86.4)		(5.4)		(5.2)		(10.1)		(10.3)
Change in Foreign Exchange Rates	—		—		(29.4)		(3.2)		—		—
Fair Value of Plan Assets at End of Year	$	1,308.3	$	1,801.7	$	140.5	$	303.7	$	8.5	$	9.0
Underfunded (Overfunded) Status	$	277.2	$	405.8	$	17.4	$	(25.4)	$	75.4	$	101.3

(1) The actuarial gains recognized in 2022 and 2021 for the U.S., OPEB, and U.K. plans were primarily driven by increases in the discount rate assumption.

The amounts recognized in our consolidated balance sheets for our pension and OPEB plans at December 31, 2022 and 2021 are as follows.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Current Liability	$	8.8	$	8.4	$	—	$	—	$	1.1	$	1.4
Noncurrent Liability	268.4		397.4		17.4		—		74.3		99.9
Noncurrent Asset	—		—		—		(25.4)		—		—
Underfunded (Overfunded) Status	$	277.2	$	405.8	$	17.4	$	(25.4)	$	75.4	$	101.3
Unrecognized Pension and Postretirement Benefit Costs
Net Actuarial Gain (Loss)	$	(517.8)	$	(621.8)	$	(83.7)	$	(42.9)	$	31.6	$	13.6
Prior Service Credit (Cost)	(0.6)		(0.6)		(0.2)		(0.2)		2.5		2.7
	(518.4)		(622.4)		(83.9)		(43.1)		34.1		16.3
Income Tax	213.5		239.2		19.5		9.1		1.1		4.9
Total Included in Accumulated Other Comprehensive Income (Loss)	$	(304.9)	$	(383.2)	$	(64.4)	$	(34.0)	$	35.2	$	21.2

The following table provides the changes recognized in other comprehensive income for the years ended December 31, 2022 and 2021.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Accumulated Other Comprehensive Income (Loss) at Beginning of Year	$	(383.2)	$	(494.6)	$	(34.0)	$	(54.7)	$	21.2	$	19.3
Net Actuarial Gain (Loss)
Amortization	16.3		21.3		0.4		1.3		(1.0)		—
All Other Changes	87.7		124.8		(41.2)		26.3		19.0		2.6
Prior Service Credit (Cost)
Amortization	—		—		—		—		(0.2)		(0.2)
Change in Income Tax	(25.7)		(34.7)		10.4		(6.9)		(3.8)		(0.5)
Accumulated Other Comprehensive Income (Loss) at End of Year	$	(304.9)	$	(383.2)	$	(64.4)	$	(34.0)	$	35.2	$	21.2

Plan Assets

The objective of our U.S. pension and OPEB plans is to maximize long-term return, within acceptable risk levels, in a manner that is consistent with the fiduciary standards of the Employee Retirement Income Security Act (ERISA), while maintaining sufficient liquidity to pay current benefits and expenses.

Our U.S. qualified defined benefit pension plan assets include a diversified blend of domestic, international, global, and emerging market equity securities, fixed income securities, opportunistic credit securities, real estate investments, alternative investments, and cash equivalents.  Equity securities are comprised of funds and individual securities that are benchmarked against the respective indices specified below. International and global equity funds may allocate a certain percentage of assets to forward currency contracts. Fixed income securities include funds and U.S. government and agency asset-backed securities, treasury futures contracts, corporate investment-grade bonds, private placement securities, and bonds issued by states or other municipalities. Opportunistic credits consist of investments in funds that hold varied fixed income investments purchased at

depressed values with the intention to later sell those investments for a gain. Real estate investments consist primarily of funds that hold commercial real estate investments. Alternative investments, which include private equity direct investments and private equity funds of funds, utilize proprietary strategies that are intended to have a low correlation to the U.S. stock market. Prohibited investments include, but are not limited to, unlisted securities, options, short sales, and investments in securities issued by Unum Group or its affiliates. The invested asset classes, asset types, and benchmark indices for our U.S. qualified defined benefit pension plan is as follows. We target approximately 38 percent to equity securities, 30 percent to fixed income securities, and 32 percent to opportunistic credits, alternative, and real estate investments.

Asset Class	Asset Type	Benchmark Indices
Equity Securities	Collective funds; Individual holdings	Morgan Stanley Capital International (MSCI) World Index
Fixed Income	Collective funds; Individual holdings	Bloomberg Barclays Long Corporate Index; Custom Index
Opportunistic Credits	Collective fund	Custom Index
Real Estate	Collective fund	Custom Index
Alternative Investments (Private Equity)	Fund of funds; Direct investments	Custom Index

The investment strategy for our U.K. pension includes increasing the funded ratio in a risk-controlled manner where the risk taken in the investment strategy reduces as the funded status of the plan increases. Assets for our U.K. pension plan are invested in a portfolio of diversified growth assets as well as a portfolio of fixed income and index-linked securities. The portfolio of growth assets consists of funds invested primarily in global equity securities, investment-grade and below-investment-grade fixed interest securities, including emerging market securities as well as diversified alternatives. The portfolio of fixed interest and index-linked securities are invested primarily in leveraged interest rate and inflation-linked gilt funds of varying durations designed to broadly match the interest rate and inflation sensitivities of the plan's liabilities. At December 31, 2022, our target allocation was approximately 50 percent to growth assets and 50 percent to fixed interest and index-linked securities. When the funded status of the plan increases, we utilize a de-risking framework whereby the allocation to fixed interest and index-linked securities increases and the allocation to growth assets is lowered. Simultaneously, the hedge ratio of interest rate and inflation risk will increase with the intention of reducing funding level volatility. There are no categories of investments that are specifically prohibited by the U.K. plan, but there are general guidelines that ensure prudent investment action is taken. Such guidelines include the prevention of the plan from using derivatives for speculative purposes and limiting the concentration of risk in any one type of investment.

Assets for the OPEB plan are invested in life insurance contracts issued by one of our insurance subsidiaries. The assets support life insurance benefits payable to certain former retirees covered under the OPEB plan. The terms of these contracts are consistent in all material respects with those the subsidiary offers to unaffiliated parties that are similarly situated. There are no categories of investments specifically prohibited by the OPEB plan.

We believe our investment portfolios are well diversified by asset class and sector, with no undue risk concentrations in any one category.

The categorization of fair value measurements by input level for the invested assets in our U.S. pension plans is shown below. The carrying values of investment-related receivables and payables approximate fair value due to the short-term nature of the securities and are not included in the following chart. Investments valued using net asset value (NAV) as a practical expedient are not required to be categorized by input level, but these investments are included as follows to reconcile to total invested assets. Certain prior year amounts were reclassified to conform to current year presentation.

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Equity Securities:
Global	$	57.4	$	—	$	—	$	405.7	$	463.1
Fixed Income Securities:
U.S. Government and Agencies1	194.0		21.7		—		—		215.7
Corporate	—		—		—		129.6		129.6
Non-U.S. Emerging Markets	—		—		—		54.0		54.0
Opportunistic Credits	—		—		—		132.3		132.3
Real Estate	—		—		—		164.2		164.2
Alternative Investments:
Private Equity Direct Investments	—		—		—		74.5		74.5
Private Equity Funds of Funds	—		—		—		47.6		47.6
Cash Equivalents	20.5		—		—		—		20.5
Total Invested Assets	$	271.9	$	21.7	$	—	$	1,007.9	$	1,301.5

1 U.S. Government and Agencies Fixed Income Securities includes derivative assets.

	December 31, 2021
	Quoted Prices in Active  Markets for  Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Equity Securities:
U.S. Large Cap	$	—	$	—	$	—	$	144.9	$	144.9
U.S. Small Cap	32.8		—		—		30.5		63.3
Global	—		—		—		388.7		388.7
Emerging Markets	—		—		—		59.8		59.8
Fixed Income Securities:
U.S. Government and Agencies1	419.3		—		—		—		419.3
Corporate	—		—		—		103.3		103.3
Opportunistic Credits	—		—		—		212.5		212.5
Real Estate	—		—		—		247.1		247.1
Alternative Investments:
Private Equity Direct Investments	—		—		—		80.4		80.4
Private Equity Funds of Funds	—		—		—		50.5		50.5
Cash Equivalents	31.9		—		—		—		31.9
Total Invested Assets	$	484.0	$	—	$	—	$	1,317.7	$	1,801.7

1 U.S. Government and Agencies Fixed Income Securities includes derivative assets.

Level 1 investments consist of individual holdings that are valued based on unadjusted quoted prices from active markets for identical securities. Level 2 investments consist of individual holdings that are valued using either directly or indirectly observable inputs other than quoted prices from active markets.

Certain equity, opportunistic credit, fixed-income securities, and real estate investments are valued based on the NAV of the underlying holdings as of the reporting date. We made no adjustments to the NAV for 2022 or 2021. These investments have no unfunded commitments and no specific redemption restrictions.

Alternative investments are valued based on NAV in a period ranging from one month to one quarter in arrears. We evaluate the need for adjustments to the NAV based on market conditions and discussions with fund managers in the period subsequent to the valuation date and prior to issuance of the financial statements. We made no adjustments to the NAV for 2022 or 2021. The private equity direct investments and private equity funds of funds generally cannot be redeemed by investors. Distributions of capital from the sale of underlying fund assets may occur at any time, but are generally concentrated between five and eight years from the formation of the fund. At December 31, 2022 and 2021, these investments had unfunded commitments of $24.5 million and $28.5 million, respectively.

The categorization of fair value measurements by input level for the invested assets in our U.K. pension plan is shown below. Investments valued using NAV as a practical expedient are not required to be categorized by input level, but these investments are included as follows to reconcile to total invested assets.

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Diversified Growth Assets	$	32.3	$	—	$	—	$	8.3	$	40.6
Fixed Income and Index-linked Securities	70.6		—		—		—		70.6
Alternative Investments	—		—		—		28.1		28.1
Cash Equivalents	1.9		—		—		—		1.9
Total Invested Assets	$	104.8	$	—	$	—	$	36.4	$	141.2

	December 31, 2021
	Quoted Prices in Active  Markets for  Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Diversified Growth Assets	$	113.1	$	—	$	—	$	44.2	$	157.3
Fixed Income and Index-linked Securities	124.1		—		—		—		124.1
Alternative Investments	—		—		—		18.2		18.2
Cash Equivalents	4.1		—		—		—		4.1
Total Invested Assets	$	241.3	$	—	$	—	$	62.4	$	303.7

The level 1 diversified growth assets and fixed interest and index-linked securities consist of individual funds that are valued based on unadjusted quoted prices from active markets for identical securities. Certain diversified growth assets were valued based on the NAV of the underlying holdings as of the reporting date. Alternative investments are valued based on NAV one quarter in arrears. We evaluate the need for adjustments to the NAV of the alternative investments based on an evaluation of cash flows in the period subsequent to the valuation date and prior to issuance of the financial statements. We made no adjustments to the NAV for 2022 or 2021. These investments generally cannot be redeemed by investors. These investments had unfunded commitments at December 31, 2022 and 2021 of $17.3 million and $28.1 million, respectively.

The categorization of fair value measurements by input level for the assets in our OPEB plan is as follows:

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in millions of dollars)
Assets
Life Insurance Contracts	$	—	$	—	$	8.5	$	8.5

	December 31, 2021
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in millions of dollars)
Assets
Life Insurance Contracts	$	—	$	—	$	9.0	$	9.0

The fair value is represented by the actuarial present value of future cash flows of the contracts.

Changes in our OPEB plan assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2022 and 2021 are as follows:

	Year Ended December 31, 2022
	Beginning of Year		Actual Return on Plan Assets		Contributions		Net Benefits and Expenses Paid		End of Year
	(in millions of dollars)
Life Insurance Contracts	$	9.0	$	0.1	$	9.5	$	(10.1)	$	8.5

	Year Ended December 31, 2021
	Beginning of Year		Actual Return on Plan Assets		Contributions		Net Benefits and Expenses Paid		End of Year
	(in millions of dollars)
Life Insurance Contracts	$	9.3	$	0.1	$	9.9	$	(10.3)	$	9.0

For the years ended December 31, 2022 and 2021, the actual return on plan assets relates solely to investments still held at the reporting date. There were no transfers into or out of Level 3 during 2022 or 2021.

Measurement Assumptions

We use a December 31 measurement date for each of our plans. The weighted average assumptions used in the measurement of our benefit obligations as of December 31 and our net periodic benefit costs for the years ended December 31 are as follows:

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
Benefit Obligations
Discount Rate	5.70	%	3.10	%	4.80	%	2.00	%	5.70	%	2.90	%
Rate of Compensation Increase	N/A		N/A		2.50	%	2.90	%	N/A		N/A
Net Periodic Benefit Cost
Discount Rate	3.10	%	2.90	%	2.00	%	1.40	%	2.90	%	2.60	%
Expected Return on Plan Assets	6.00	%	6.00	%	4.20	%	3.50	%	5.75	%	5.75	%
Rate of Compensation Increase	N/A		N/A		2.90	%	2.80	%	N/A		N/A

We set the discount rate assumption annually for each of our retirement-related benefit plans at the measurement date to reflect the yield on a portfolio of high quality fixed income corporate debt instruments matched against projected cash flows for future benefits.

Our long-term rate of return on plan assets assumption is selected from a range of probable return outcomes from an analysis of the asset portfolio.  Our expectations for the future investment returns of the asset categories are based on a combination of historical market performance, evaluations of investment forecasts obtained from external consultants and economists, and current market yields. The methodology underlying the return assumption includes the various elements of the expected return for each asset class such as long-term rates of return, volatility of returns, and the correlation of returns between various asset classes. The expected return for the total portfolio is calculated based on the plan's strategic asset allocation.  Investment risk is measured and monitored on an ongoing basis through annual liability measurements, periodic asset/liability studies, and quarterly investment portfolio reviews.  Risk tolerance is established through consideration of plan liabilities, plan funded status, and corporate financial condition.

Our mortality rate assumption reflects our best estimate, as of the measurement date, of the life expectancies of plan participants in order to determine the expected length of time for benefit payments. We derive our assumptions from industry mortality tables.

The expected return assumption for the life insurance reserve for our OPEB plan is based on full investment in fixed income securities with an average book yield of 4.31 percent and 4.59 percent in 2022 and 2021, respectively.

The rate of compensation increase assumption for our U.K. pension plan is generally based on periodic studies of compensation trends.

At December 31, 2022 and 2021, the annual rates of increase in the per capita cost of covered postretirement health care benefits assumed for the next calendar year are 7.00 percent and 6.25 percent, respectively, for benefits payable to both retirees prior to Medicare eligibility as well as Medicare eligible retirees. The rates are assumed to change gradually to 5.00 percent by 2031 for measurement at December 31, 2022 and remain at that level thereafter. The annual rates of increase in the per capita cost of covered postretirement health benefits do not apply to retirees whose postretirement health care benefits are provided through an exchange.

Net Periodic Benefit Cost

The following table provides the components of the net periodic benefit cost (credit) for the years ended December 31.

	Pension Benefits
	U.S. Plans						U.K. Plan						OPEB
	2022		2021		2020		2022		2021		2020		2022		2021		2020
	(in millions of dollars)
Service Cost	$	7.7	$	9.6	$	11.0	$	—	$	—	$	—	$	—	$	—	$	—
Interest Cost	67.2		65.0		73.0		5.0		4.2		4.9		3.0		3.0		4.1
Expected Return on Plan Assets	(105.9)		(100.6)		(106.7)		(10.9)		(9.8)		(9.5)		(0.5)		(0.5)		(0.5)
Amortization of:
Net Actuarial Loss (Gain)	16.3		21.3		18.7		0.4		1.3		1.1		(1.0)		—		—
Prior Service Cost (Credit)	—		—		0.1		—		—		—		(0.2)		(0.2)		(0.2)
Curtailment Gain	—		—		—		—		—		0.1		—		—		—
Total Net Periodic Benefit Cost (Credit)	$	(14.7)	$	(4.7)	$	(3.9)	$	(5.5)	$	(4.3)	$	(3.4)	$	1.3	$	2.3	$	3.4

The service cost component of net periodic pension and postretirement benefit cost (credit) is included as a component of compensation expense in our consolidated statements of income. All other components of net periodic pension and postretirement benefit cost (credit) are included in other expenses.

Benefit Payments

The following table provides expected benefit payments, which reflect expected future service, as appropriate.

	Pension Benefits
	U.S. Plans		U.K. Plan		OPEB
	(in millions of dollars)
Year					Gross		Subsidy Payments		Net
2023	$	84.9	$	5.4	$	10.0	$	0.1	$	9.9
2024	88.2		5.5		9.4		0.1		9.3
2025	92.1		5.7		9.0		0.1		8.9
2026	96.5		5.8		8.5		—		8.5
2027	100.6		6.0		8.1		—		8.1
2028-2032	550.6		32.4		34.0		0.1		33.9

Funding Policy

The funding policy for our U.S. qualified defined benefit pension plan is to contribute an amount at least equal to the minimum contributions required under ERISA and other applicable laws, but generally not greater than the maximum amount that can be deducted for federal income tax purposes. We had no regulatory contribution requirements for our U.S. qualified defined benefit pension plan in 2022 and made no amount of voluntary contributions during 2022. We do not expect to have regulatory contribution requirements for our U.S. qualified defined benefit pension plan in 2023, but we reserve the right to make voluntarily contributions during 2023. The funding policy for our U.S. non-qualified defined benefit pension plan, which is not subject to ERISA, is to contribute the amount necessary to satisfy the liabilities of the plan as they come due to participants. We expect to make contributions to the U.S. non-qualified defined benefit pension plan of approximately $9 million to fund the benefit payments in 2023.

We had no regulatory contribution requirements for our U.K. defined benefit pension plan in 2022 and made no amount of voluntary contributions during 2022. We do not expect to have regulatory contribution requirements for our U.K. defined benefit pension plan in 2023, but we reserve the right to make voluntarily contributions during 2023.

Our OPEB plan represents a non-vested, non-guaranteed obligation, and current regulations do not require specific funding levels for these benefits, which are comprised of retiree life, medical, and dental benefits. It is our practice to use general assets to pay medical and dental claims as they come due in lieu of utilizing plan assets for the medical and dental benefit portions of our OPEB plan.

Defined Contribution Plans

We offer a 401(k) plan to all eligible U.S. employees under which a portion of employee contributions is matched. We match dollar-for-dollar up to 5.0 percent of base salary and any recognized sales and performance-based incentive compensation for employee contributions into the plan. We also make an additional non-elective contribution of 4.5 percent of earnings for all eligible employees and made a separate transition contribution for eligible employees who met certain age and years of service criteria as of December 31, 2013. The separate transition contributions continued through December 31, 2020, at which point they ended. The 401(k) plan remains in compliance with ERISA guidelines and continues to qualify for a “safe harbor” from most annual discrimination testing.

We also offer a defined contribution plan to all eligible U.K. employees and offer related employer contributions. If an employee elects to make a minimum contribution of at least 1.0 percent of their base salary, we match with a contribution of 8.0 percent. We increase our contribution to a maximum of 12.0 percent as the employee increases their contribution from 1.0 percent to 5.0 percent. We do not increase our contribution percentage on employee contributions in excess of 5.0 percent.

During the years ended December 31, 2022, 2021, and 2020, we recognized costs of $70.9 million, $71.0 million, and $83.4 million, respectively, for our U.S. defined contribution plan. We recognized costs of $4.9 million, $4.9 million, and $5.0 million in 2022, 2021, and 2020, respectively, for our U.K. defined contribution plan.

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Stockholders' Equity and Earnings Per Common Share

12 Months Ended

Dec. 31, 2022

Stockholders' Equity and Earnings Per Common Share [Abstract]

Earnings Per Share Disclosure

Earnings Per Common Share

Net income per common share is determined as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars, except share data)
Numerator
Net Income	$	1,314.2	$	824.2	$	793.0
Denominator (000s)
Weighted Average Common Shares - Basic	200,647.2		204,232.9		203,642.0
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	1,462.2		615.0		113.3
Weighted Average Common Shares - Assuming Dilution	202,109.4		204,847.9		203,755.3
Net Income Per Common Share
Basic	$	6.55	$	4.04	$	3.89
Assuming Dilution	$	6.50	$	4.02	$	3.89

We compute basic earnings per share by dividing net income by the weighted average number of common shares outstanding for the period. In computing earnings per share assuming dilution, we include potential common shares that are dilutive (those that

reduce earnings per share). We use the treasury stock method to account for the effect of outstanding stock options, nonvested stock success units, nonvested restricted stock units, and nonvested performance share units on the computation of diluted earnings per share. Under this method, the potential common shares from stock options, nonvested stock success units, and nonvested restricted stock units will each have a dilutive effect, as individually measured, when the average market price of Unum Group common stock during the period exceeds the exercise price of the stock options and the grant price of the nonvested stock success units and nonvested restricted stock units. Potential common shares from performance based share units will have a dilutive effect as the attainment of performance conditions is progressively achieved during the vesting period. Potential common shares not included in the computation of diluted earnings per share because the impact would be antidilutive, approximated 0.1 million, 1.1 million, and 1.6 million for the years ended December 31, 2022, 2021, and 2020, respectively. See Note 11 for further discussion of our stock-based compensation plans.

Stockholders' Equity Disclosure

Common Stock

As part of our capital deployment strategy, we may repurchase shares of Unum Group's common stock, as authorized by our board of directors. The timing and amount of repurchase activity is based on market conditions and other considerations, including the level of available cash, alternative uses for cash, and our stock price. In October 2021, our board of directors authorized the repurchase of up to $250.0 million of Unum Group's outstanding common stock. The October 2021 share repurchase program expired on December 31, 2022, at which point there was no remaining repurchase amount under the program. During 2020 and the first nine months of 2021, there was no authorized share repurchase program.

In December 2022, our board of directors authorized the repurchase of up to $200.0 million of Unum Group's outstanding common stock beginning on January 1, 2023. In February 2023, our board of directors authorized an increase to the share repurchase program such that we are now authorized to repurchase up to $250.0 million of Unum Group's outstanding common stock. This share repurchase program has an expiration date of December 31, 2023.

Common stock repurchases, which are accounted for using the cost method and classified as treasury stock until otherwise retired, were as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions)
Shares Repurchased	5.7		1.9		—
Cost of Shares Repurchased1	$	200.1	$	50.0	$	—

1 Includes commissions of $0.1 million for the year ended December 31, 2022.

In February 2022, we entered into an accelerated share repurchase agreement with a financial counterparty to repurchase $50.0 million of Unum Group's common stock in aggregate. As part of this transaction, we paid $50.0 million to the financial counterparty and received an initial delivery of 1.3 million shares of our common stock, which represented approximately 75 percent of the total delivery under the agreement. We simultaneously entered into a forward contract indexed to the price of Unum Group common stock, which subjected the transaction to a future price adjustment. Under the terms of the share repurchase agreement, we were to receive, or be required to pay, a price adjustment based on the volume weighted average price of Unum Group common stock during the term of the agreement, less a discount. Any price adjustment payable to us was to be settled in shares of Unum Group common stock. Any price adjustment we would have been required to pay would have been settled in either cash or common stock at our option. The final price adjustment settlement, along with the delivery of the remaining shares, occurred in April 2022, resulting in the delivery to us of 0.4 million additional shares. In total, we repurchased 1.7 million shares pursuant to the February 2022 accelerated share repurchase agreement. During the year ended December 31, 2022, we repurchased 4.0 million shares in open market transactions at a cost of $150.1 million.

In November 2021, we entered into an accelerated repurchase agreement with terms similar to the previously discussed February 2022 accelerated share repurchase agreement. Pursuant to this agreement, we paid $50.0 million to a financial counterparty and received an initial delivery of 1.4 million shares of our common stock. We simultaneously entered into a forward contract indexed to the price of Unum Group common stock, which resulted in the delivery to us of 0.5 million additional shares also in November 2021. In total, we repurchased 1.9 million shares pursuant to the accelerated repurchase agreement. During 2021, there were no shares repurchased in open market transactions.

Preferred Stock

Unum Group has 25.0 million shares of preferred stock authorized with a par value of $0.10 per share. No preferred stock has been issued to date.

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Stock-Based Compensation

12 Months Ended

Dec. 31, 2022

Share-Based Payment Arrangement [Abstract]

Disclosure of Compensation Related Costs, Share-based Payments

Description of Stock Plans

Under the 2022 Stock Incentive Plan (the 2022 Plan), up to 6.8 million shares of common stock are available for awards to our employees, officers, consultants, and directors.  Awards may be in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, performance share units, and other stock-based awards.  Each award, under the 2022 plan is counted as 1.00 share. The exercise price for stock options issued cannot be less than the fair value of the underlying common stock as of the grant date. The maximum term of each stock option or stock appreciation right is ten years after the date of grant.  At December 31, 2022, approximately 6.6 million shares were available for future grants under the 2022 Plan.

Under the Stock Incentive Plan of 2017 (the 2017 Plan), which was terminated in May 2022 for the purposes of any further grants, up to 17.0 million shares of common stock were available for awards to our employees, officers, consultants, and directors. Awards could be in the form of stock options, stock appreciation rights, restricted stock, restricted stock units, performance share units, and other stock-based awards. Each full-value award under the 2017 plan, defined as any award other than a stock option or stock appreciation right, were counted as 1.76 shares. Awards granted before the termination of the 2017 Plan remain outstanding in accordance with the plan's terms. Any shares subject to an outstanding award under the 2017 Plan that, after March 15, 2022, is not issued because the award is forfeited, terminates, expires or lapses without being exercised (as applicable), or is settled for cash, will become available for issuance under the 2022 Plan. Stock options had a term of eight years after the date of grant and fully vest after three years.

We issue new shares of common stock for all of our stock plan vestings and exercises.

Stock Success Units (SSUs)

SSUs are classified as equity. As of both December 31, 2022 and 2021, there were 208 thousand shares of SSUs outstanding with a weighted average grant date fair value of $18.78 per share. There were no issuances of SSUs during 2022 or 2021. During 2020, we issued SSUs with a weighted average grant date fair value per share of $18.78. SSUs vest over a six year period, beginning at the date of grant. One-third of the SSUs are eligible for accelerated vesting on a cumulative basis at the end of each of the one-, three-, and five-year service periods that began on January 1, 2021, if certain performance goals are achieved. Forfeitable dividends on SSUs are accrued in the form of cash. Compensation cost for SSUs subject to accelerated vesting due to the achievement of certain performance conditions at the end of the one-, three-, and five-year service periods is recognized over the implicit service period.

No SSUs vested or were forfeited during 2022. The total fair value of SSUs that vested during 2021 was $1.9 million. No SSUs vested during 2020. At December 31, 2022, we had $1.7 million of unrecognized compensation cost related to SSUs that will be recognized over a remaining weighted average period of 1.2 years.

Performance Share Units (PSUs)

PSUs are classified as equity. There were no new issuances of PSUs during 2022 or 2021. During 2020, we issued PSUs with a weighted average grant date fair value per share of $23.49. Vesting for the PSUs occurred at the end of a three-year period and was contingent upon our achievement of prospective company performance goals and our total shareholder return relative to a board-approved peer group during the three-year period. Actual performance, including modification for relative total shareholder return, could have resulted in the ultimate award of 40 percent to 180 percent of the initial number of PSUs issued, with the potential for no award if company performance goals had not been achieved during the three-year period. Forfeitable dividend equivalents on PSUs were accrued as cash.

We had no outstanding PSUs at December 31, 2022. We had 308 thousand PSUs outstanding at December 31, 2021 with a weighted average grant date fair value of $23.58 per share. There was a decrease of 75 thousand shares granted during 2022 with a weighted average grant date fair value of $40.67 per share, which reflects the application of the performance factor to the 2019 PSU grant that was less than 100 percent. 256 thousand shares vested during 2022 with a weighted average grant date fair value of $16.29 per share. Included in the 2022 vested amount is the application of the performance factor to the 2019 PSU grant, which occurred during the first quarter of 2022. There were 2 thousand shares forfeited during 2022 with a weighted average grant date fair value of $23.58 per share.

PSU shares represent aggregate initial target awards and accrued dividend equivalents and do not reflect potential increases or decreases resulting from the application of the performance factor determined after the end of the performance periods. At December 31, 2022, the three-year performance period for the 2020 PSU grant was completed and the related shares vested, but the performance factor had not yet been applied. The performance factor will be applied during the first quarter of 2023, with distribution of the stock at that time.

The total fair value of shares vested during 2022, 2021, and 2020 was $4.2 million, $6.6 million, and $6.5 million, respectively. At December 31, 2022, we had no unrecognized compensation cost related to PSUs as there are no remaining PSUs outstanding. The estimated compensation expense was adjusted for actual performance experience and was recognized ratably during the service period when it became probable that the performance conditions would be satisfied. Compensation cost for PSUs subject to accelerated vesting at the date of retirement eligibility was recognized over the implicit service period.

The fair value of PSUs is estimated on the date of initial grant using the Monte-Carlo simulation model. Key assumptions used to value PSUs granted during 2020 are as follows:

	Year Ended December 31, 2020
Expected Volatility (based on our and our peer group historical daily stock prices)	23	%
Expected Life (equals the performance period)	3 years
Risk Free Interest Rate (based on U.S. Treasury yields at the date of grant)	0.85	%

Cash Incentive Units (CIUs)

Activity for CIUs classified as a liability is as follows:

		Weighted Average
	Units	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	7,223	$	1.07
Granted	8,024	1.09
Outstanding at December 31, 2022	15,247	1.08

During 2022 and 2021, we issued CIUs with a weighted average grant date fair value per unit of $1.09 and $1.07, respectively. During 2020, no CIUs were issued. CIUs are denominated and settled in cash. Vesting for the CIUs occurs at the end of a three-year period and is based upon prospective company performance measures and our total shareholder return relative to a board-approved peer group during the three-year period. Actual performance, including modification for relative total shareholder return, may result in the ultimate award of 0 percent to 200 percent of the initial number of CIUs issued.

CIUs in the preceding table represent aggregate initial target awards and do not reflect potential increases or decreases resulting from the application of the performance factor determined after the end of the performance periods. No CIUs have vested as of December 31, 2022.

At December 31, 2022, we had approximately $9.6 million of unrecognized compensation cost related to CIUs that will be recognized over a weighted average period of one year. The estimated compensation expense is adjusted for actual performance experience and is recognized ratably during the service period, or remaining service period, if and when it becomes probable that the performance conditions will be satisfied. Compensation cost for CIUs subject to accelerated vesting at the date of retirement eligibility is recognized over the implicit service period.

The fair value of CIUs is estimated at each reporting period using the Monte-Carlo simulation model. Key assumptions used to value CIUs granted during current year are as follows:

	Year Ended December 31
	2022		2021
Expected Volatility (based on our and our peer group historical daily stock prices)	30	%	50	%
Expected Life (equals the performance period)	3 years		3 years
Risk Free Interest Rate (based on U.S. Treasury yields at the date of grant)	4.26	%	0.71	%

Restricted Stock Units (RSUs)

Activity for RSUs classified as equity is as follows:

		Weighted Average
	Shares	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	2,016	$	26.63
Granted	1,323	28.21
Vested	(1,018)	27.51
Forfeited	(139)	26.19
Outstanding at December 31, 2022	2,182	27.20

During 2022, 2021, and 2020, we issued RSUs with a weighted average grant date fair value per share of $28.21, $27.02, and $22.71, respectively.  RSUs vest over a one to three-year service period, beginning at the date of grant, and the compensation cost is recognized ratably during the vesting period.  Forfeitable dividend equivalents on RSUs are accrued as cash.

Compensation cost for RSUs subject to accelerated vesting at the date of retirement eligibility is recognized over the implicit service period.

The total fair value of shares vested during 2022, 2021, and 2020 was $28.0 million, $23.9 million, and $25.1 million, respectively. At December 31, 2022, we had $31.9 million of unrecognized compensation cost related to RSUs that will be recognized over a weighted average period of 0.8 years.

Cash-Settled RSUs

Activity for cash-settled RSUs classified as a liability is as follows:

		Weighted Average
	Shares	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	46	$	23.31
Vested	(23)	23.31
Outstanding at December 31, 2022	23	23.31

During 2020, we issued cash-settled RSUs with a weighted average grant date fair value per share of $22.94. There were no issuances of cash-settled RSUs during 2022 or 2021. Cash-settled RSUs vest over a one to three-year service period, beginning at the date of grant, and the compensation cost is recognized ratably during the vesting period. Forfeitable dividends on cash-settled RSUs are accrued in the form of cash. Compensation cost for cash-settled RSUs subject to accelerated vesting at the date of retirement eligibility is recognized over the implicit service period. The total fair value of cash-settled RSUs that vested during 2022 and 2021 was $0.7 million and $0.6 million, respectively. No cash-settled RSUs vested during 2020.

The amount payable per unit awarded is equal to the price per share of Unum Group's common stock at settlement of the award, and as such, we measure the value of the award each reporting period based on the current stock price. The effects of changes in the stock price during the service period are recognized as compensation cost over the service period. Changes in the amount of the liability due to stock price changes after the service period are recognized as compensation cost during the period in which the changes occur. At December 31, 2022, we had $0.2 million of unrecognized compensation cost related to cash-settled RSUs that will be recognized over a weighted average period of 0.1 years.

Stock Options

There were no stock options granted or vested in the years 2020 through 2022. There were no options exercised in 2022, and the intrinsic value of options exercised in both 2021 and 2020 was $0.1 million. As of December 31, 2021, we have no unrecognized compensation cost related to stock options as there are no exercisable stock options outstanding. Stock options vested over a one to three-year service period, beginning at the date of grant, and the compensation cost was recognized ratably during the vesting period. Compensation cost for stock options subject to accelerated vesting at the date of retirement eligibility was recognized over the implicit service period.

Expense

Compensation expense for the stock based plans, as reported in our consolidated statements of income, is as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Performance Share Units	$	5.7	$	3.3	$	5.6
Cash Incentive Units	12.8		3.2		—
Restricted Stock Units and Cash-Settled Restricted Stock Units	32.7		25.5		23.9
Stock Success Units	0.9		2.8		0.4
Other	0.6		0.6		0.5
Total Compensation Expense, Before Income Tax	$	52.7	$	35.4	$	30.4
Total Compensation Expense, Net of Income Tax	$	47.3	$	31.1	$	26.1

Cash received under all share-based payment arrangements for the years ended December 31, 2022, 2021, and 2020 was $4.2 million, $3.8 million, and $4.4 million, respectively.

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Reinsurance

12 Months Ended

Dec. 31, 2022

Reinsurance Disclosures [Abstract]

Reinsurance

Reinsurance activity related to both our premium income and changes in reserves for future benefits are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Direct Premium Income	$	9,900.5	$	9,742.8	$	9,621.9
Reinsurance Assumed	78.7		90.6		94.1
Reinsurance Ceded	(355.8)		(352.4)		(337.9)
Net Premium Income	$	9,623.4	$	9,481.0	$	9,378.1
Ceded Benefits and Change in Reserves for Future Benefits	$	1,034.6	$	862.5	$	628.8

In December 2020, Provident, The Paul Revere Life Insurance Company (Paul Revere Life), and Unum America, wholly-owned domestic insurance subsidiaries of Unum Group and collectively referred to as "the ceding companies", each entered into separate reinsurance agreements with Commonwealth Annuity and Life Insurance Company (Commonwealth), to reinsure on a coinsurance basis effective as of July 1, 2020 approximately 75 percent of the Closed Block individual disability business, primarily direct business written by the ceding companies. In March 2021, we completed the second phase of the reinsurance transaction, pursuant to which the ceding companies and Commonwealth amended and restated their respective reinsurance agreements to reinsure on a coinsurance and modified coinsurance basis effective as of January 1, 2021, a substantial portion of the remaining Closed Block individual disability business that was not ceded in December 2020, primarily business previously assumed by the ceding companies. Commonwealth has established and will maintain collateralized trust accounts for the benefit of the ceding companies to secure its obligations under the relevant reinsurance agreement. In connection with the first phase of the reinsurance transaction which occurred in December 2020, the ceding companies paid a total ceding commission to Commonwealth of $437.7 million and transferred additional assets consisting primarily of fixed maturity securities and cash totaling $6,669.8 million. In connection with the second phase of the reinsurance transaction which occurred in March 2021, Commonwealth paid a total ceding commission to the ceding companies of $18.2 million. Also in connection with the second phase, the ceding companies transferred additional assets consisting primarily of fixed maturity securities and cash to Commonwealth of $767.0 million.

In December 2020, Provident Life and Casualty Insurance Company (PLC), also a wholly-owned domestic insurance subsidiary of Unum Group, entered into an agreement with Commonwealth whereby PLC will provide a 12-year volatility cover to

Commonwealth for the active life cohort (ALR cohort). As part of this agreement, PLC received a payment from Commonwealth of approximately $62 million. In March 2021, PLC and Commonwealth amended and restated this agreement to incorporate the ALR cohort related to the additional business that was reinsured between the ceding companies and Commonwealth as part of the second phase of the transaction. As part of the amended and restated volatility cover, PLC received a payment from Commonwealth of approximately $18 million. At the end of the 12-year coverage period in 2032, Commonwealth will retain the remaining incidence and claims risk on the ALR cohort of the ceded business. Under this volatility cover, annual settlements will be made equal to the difference between the actual and estimated cash flows and reserve changes during the year. Upon expiration of the 12-year period, a terminal settlement will be made based on the final disabled life reserves. As a result of the volatility cover, the reinsurance agreement covering the ALR cohort does not pass risk transfer requirements under GAAP and is accounted for under the deposit method.

As a result of the reinsurance transaction, we recognized the following items for the first phase in December 2020 and the second phase in March 2021, respectively:

•Net realized investment gains totaling $1,302.3 million and $67.6 million related to the transfer of investments.

•Increase in benefits and change in reserves for future benefits of $1,284.5 million and $133.1 million resulting from the realization of previously unrealized investment gains and losses recorded in accumulated other comprehensive income.

•Transaction costs totaling $21.0 million and $6.2 million.

•Reinsurance recoverable of $6,141.5 million and $990.0 million related to the policies on claim status (DLR cohort).

•Cost of reinsurance, or prepaid reinsurance premium, of $815.7 million and $43.1 million related to the DLR cohort.

•Deposit asset of $88.2 million and $5.0 million related to the ALR cohort.

•Tax benefit of $36.5 million, in connection with the first phase.

•Payable of $307.2 million related to the portfolio of invested assets associated with the business ceded on a modified coinsurance basis, in connection with the second phase.

The cost of reinsurance is amortized over the expected run-off pattern of the ceded reserves for the DLR cohort and we recognized $63.8 million, $79.1 million, and $2.6 million in amortization expense for 2022, 2021, and 2020, respectively. The deposit asset is adjusted over the 12-year period of the volatility cover based on cash flows related to the ALR cohort, settlement payments as determined above, and accretion of interest and will result in an amount equal to the expected disabled life reserve for the ALR cohort at the expiration of the volatility cover. Both the cost of reinsurance and the deposit asset are reported in Other Assets within our Consolidated Balance Sheets.

As of December 31, 2022, Commonwealth accounted for 59 percent of the total reinsurance recoverable and the majority of our total cost of reinsurance. Commonwealth has an A rating by A.M. Best Company (AM Best) and has also established collateralized trust accounts for our benefit to secure its obligations. In addition, nine other major companies, which account for approximately 36 percent of our reinsurance recoverable, are also rated A or better by either AM Best or Standard & Poor's Ratings Services (S&P), or are fully securitized by letters of credit or investment-grade fixed maturity securities held in trust. Approximately 4 percent of our reinsurance recoverable is primarily related to business reinsured with other companies also rated A- or better by AM Best or S&P, with overseas entities with equivalent ratings, or backed by letters of credit or trust agreements, or through reinsurance arrangements wherein we retain the assets in our general account. Less than one percent of our reinsurance recoverable is held by companies either rated below A- by AM Best or S&P, or not rated.

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Segment Information

12 Months Ended

Dec. 31, 2022

Segment Reporting [Abstract]

Segment Information

We have three principal operating business segments: Unum US, Unum International, and Colonial Life. Our other segments are Closed Block and Corporate.

The Unum US segment is comprised of group disability, group life and accidental death and dismemberment, and supplemental and voluntary lines of business. The group disability line of business includes long-term and short-term disability, medical stop-loss, and fee-based service products. The supplemental and voluntary line of business includes voluntary benefits, individual disability, and dental and vision products. These products are marketed through our field sales personnel who work in conjunction with independent brokers and consultants.

The Unum International segment is comprised of our operations in both the United Kingdom and Poland. Our Unum UK products include insurance for group long-term disability, group life, and supplemental lines of business which include dental, individual disability, and critical illness products. Our Unum Poland products include insurance for individual and group life with accident and health riders. Unum International's products are sold primarily through field sales personnel and independent brokers and consultants.

The Colonial Life segment includes insurance for accident, sickness, and disability products, which includes our dental and

vision products, life products, and cancer and critical illness products marketed to employees, on both a group and an individual basis, at the workplace through an independent contractor agent sales force and brokers.

The Closed Block segment consists of group and individual long-term care, and other insurance products no longer actively marketed. We discontinued offering individual long-term care in 2009 and group long-term care in 2012. Other insurance products include individual disability, group pension, individual life and corporate-owned life insurance, reinsurance pools and management operations, and other miscellaneous product lines. In December 2020, we entered into the first phase of a reinsurance agreement to reinsure the majority of our Closed Block individual disability products to a third party. In March 2021, we completed the second phase of the reinsurance transaction to reinsure a portion of the remaining Closed Block individual disability business that was not ceded in December 2020. See Note 12 for further discussion.

The Corporate segment includes investment income on corporate assets not specifically allocated to a line of business, interest expense on corporate debt, and certain other corporate income and expenses not allocated to a line of business.

Impairment Loss on Internal-Use Software

During 2021, we recognized an impairment loss of $12.1 million for previously capitalized internal-use software that we no longer plan to utilize. We determined that this internal-use software would no longer be developed in order to focus our efforts on the development of software that better supports our long-term strategic goals. The impairment loss reduced the carrying value of the internal-use software to zero and has been recorded within other expenses in the consolidated statements of income and is included within our Corporate segment.

Costs Related to Organizational Design Update

During 2020, we realigned certain parts of our organizational structure by shifting resources to accelerate growth, fund priority investments, and simplify and improve our business practices. In connection with this update, we incurred charges of $23.3 million, which primarily consisted of employee severance and benefit costs as well as certain costs related to lease terminations and the disposal of certain fixed assets. These costs were recorded within either compensation expense or other expenses in the consolidated statements of income and were included within our Corporate segment. This update did not result in the exit or disposal of any of our lines of business.

Segment information is shown below. Certain prior year amounts were reclassified to conform to current year presentation.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	1,911.7	$	1,827.8	$	1,828.5
Group Short-term Disability	926.3		864.0		799.2
Group Life and Accidental Death & Dismemberment
Group Life	1,669.1		1,641.9		1,640.5
Accidental Death & Dismemberment	173.7		165.1		163.9
Supplemental and Voluntary
Voluntary Benefits	840.6		846.7		875.2
Individual Disability	461.1		459.8		456.0
Dental and Vision	275.8		272.7		255.6
	6,258.3		6,078.0		6,018.9
Unum International
Unum UK
Group Long-term Disability	376.9		401.9		364.9
Group Life	138.2		112.3		108.5
Supplemental	114.0		112.6		99.8
Unum Poland	89.7		90.2		79.6
	718.8		717.0		652.8
Colonial Life
Accident, Sickness, and Disability	948.9		953.3		975.1
Life	401.1		384.7		376.4
Cancer and Critical Illness	352.0		352.2		360.5
	1,702.0		1,690.2		1,712.0
Closed Block
Long-term Care	697.4		704.3		666.9
All Other	246.9		291.5		327.5
	944.3		995.8		994.4
Total Premium Income	$	9,623.4	$	9,481.0	$	9,378.1

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Year Ended December 31, 2022
Premium Income	$	6,258.3	$	718.8	$	1,702.0	$	944.3	$	—	$	9,623.4
Net Investment Income	676.3		170.1		152.7		1,070.6		52.5		2,122.2
Other Income	196.3		0.9		1.1		58.0		4.8		261.1
Adjusted Operating Revenue	$	7,130.9	$	889.8	$	1,855.8	$	2,072.9	$	57.3	$	12,006.7
Adjusted Operating Income (Loss)	$	970.7	$	127.0	$	374.6	$	247.9	$	(164.3)	$	1,555.9
Interest and Debt Expense	$	—	$	—	$	—	$	—	$	192.7	$	192.7
Depreciation and Amortization	$	370.6	$	22.0	$	303.5	$	4.7	$	0.6	$	701.4
Year Ended December 31, 2021
Premium Income	$	6,078.0	$	717.0	$	1,690.2	$	995.8	$	—	$	9,481.0
Net Investment Income	721.6		132.7		172.0		1,159.0		27.9		2,213.2
Other Income	170.0		0.6		1.0		65.1		6.2		242.9
Adjusted Operating Revenue	$	6,969.6	$	850.3	$	1,863.2	$	2,219.9	$	34.1	$	11,937.1
Adjusted Operating Income (Loss)	$	464.9	$	105.7	$	329.2	$	394.7	$	(177.9)	$	1,116.6
Interest and Debt Expense	$	—	$	—	$	—	$	—	$	185.0	$	185.0
Depreciation and Amortization	$	400.9	$	21.0	$	275.4	$	5.1	$	0.7	$	703.1
Year Ended December 31, 2020
Premium Income	$	6,018.9	$	652.8	$	1,712.0	$	994.4	$	—	$	9,378.1
Net Investment Income	720.3		104.6		155.7		1,370.3		9.8		2,360.7
Other Income	154.9		0.5		1.1		66.6		1.1		224.2
Adjusted Operating Revenue	$	6,894.1	$	757.9	$	1,868.8	$	2,431.3	$	10.9	$	11,963.0
Adjusted Operating Income (Loss)	$	825.4	$	76.6	$	335.4	$	241.4	$	(200.8)	$	1,278.0
Interest and Debt Expense	$	—	$	—	$	—	$	3.1	$	185.1	$	188.2
Depreciation and Amortization	$	421.7	$	20.1	$	273.9	$	5.9	$	0.7	$	722.3

			Unum		Colonial
	Unum US		International		Life		Total
	(in millions of dollars)
Deferred Acquisition Costs
Year Ended December 31, 2022
Beginning of Year	$	1,096.2	$	35.4	$	1,076.3	$	2,207.9
Capitalization	273.1		12.0		271.8		556.9
Amortization	(294.9)		(7.6)		(288.5)		(591.0)
Adjustment Related to Unrealized Investment Gains and Losses	15.0		—		66.7		81.7
Foreign Currency	—		(3.2)		—		(3.2)
End of Year	$	1,089.4	$	36.6	$	1,126.3	$	2,252.3
Year Ended December 31, 2021
Beginning of Year	$	1,168.7	$	32.0	$	1,071.9	$	2,272.6
Capitalization	242.7		12.8		252.6		508.1
Amortization	(319.0)		(8.0)		(259.1)		(586.1)
Adjustment Related to Unrealized Investment Gains and Losses	3.8		—		10.9		14.7
Foreign Currency	—		(1.4)		—		(1.4)
End of Year	$	1,096.2	$	35.4	$	1,076.3	$	2,207.9
Year Ended December 31, 2020
Beginning of Year	$	1,223.0	$	26.4	$	1,074.6	$	2,324.0
Capitalization	291.5		12.1		272.6		576.2
Amortization	(341.0)		(7.4)		(257.7)		(606.1)
Adjustment Related to Unrealized Investment Gains and Losses	(4.8)		—		(17.6)		(22.4)
Foreign Currency	—		0.9		—		0.9
End of Year	$	1,168.7	$	32.0	$	1,071.9	$	2,272.6

	December 31
	2022		2021
	(in millions of dollars)
Assets
Unum US	$	16,278.7	$	18,696.3
Unum International	3,154.9		4,086.5
Colonial Life	4,448.9		4,895.9
Closed Block	34,241.2		38,287.9
Corporate	3,311.2		4,149.0
Total Assets	$	61,434.9	$	70,115.6

Revenue is primarily derived from sources in the United States, the United Kingdom, and Poland. There are no material revenues or assets attributable to foreign operations other than those reported in our Unum International segment.

We report goodwill in our Unum US, Unum International, and Colonial Life segments, which are the segments expected to benefit from the originating business combinations. At December 31, 2022 and 2021 goodwill was $347.6 million and $352.2 million, respectively, with $280.0 million attributable to Unum US in each year, $39.9 million and $44.5 million, respectively, attributable to Unum International, and $27.7 million attributable to Colonial Life in each year.

Stockholders' equity is allocated to the operating segments on the basis of an internal allocation formula that reflects the volume and risk components of each operating segment's business and aligns allocated equity with our target capital levels for regulatory and rating agency purposes. We modify this formula periodically to recognize changes in the views of capital requirements.

We measure and analyze our segment performance on the basis of "adjusted operating revenue" and "adjusted operating income" or "adjusted operating loss", which differ from total revenue and income before income tax as presented in our consolidated statements of income due to the exclusion of investment gains and losses and the amortization of the cost of reinsurance as well as other items specified in the reconciliations below. We believe adjusted operating revenue and adjusted operating income or loss are better performance measures and better indicators of the revenue and profitability and underlying trends in our business. These performance measures are in accordance with GAAP guidance for segment reporting, but they should not be viewed as a substitute for total revenue, income before income tax, or net income. 

Investment gains or losses primarily include realized investment gains or losses, expected investment credit losses, and gains or losses on derivatives. Investment gains or losses depend on market conditions and do not necessarily relate to decisions regarding the underlying business of our segments. Our investment focus is on investment income to support our insurance liabilities as opposed to the generation of investment gains or losses. Although we may experience investment gains or losses which will affect future earnings levels, a long-term focus is necessary to maintain profitability over the life of the business since our underlying business is long-term in nature, and we need to earn the interest rates assumed in calculating our liabilities.

As previously discussed in Note 12, we have exited a substantial portion of our Closed Block individual disability product line through the two phases of the reinsurance transaction that were executed in December 2020 and March 2021. As a result, we exclude the amortization of the cost of reinsurance that was recognized upon the exit of the business related to the DLR cohort of policies. We believe that the exclusion of the amortization of the cost of reinsurance provides a better view of our results from our ongoing businesses.

We may, at other times, exclude certain other items from our discussion of financial ratios and metrics in order to enhance the understanding and comparability of our operational performance and the underlying fundamentals but this exclusion is not an indication that similar items may not recur and does not replace net income or net loss as a measure of our overall profitability.

See above and Notes 3, 6, 8, 12, and 15 for further discussion regarding the items specified in the reconciliation below.

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
	2022		2021		2020
	(in millions of dollars)
Total Revenue	$	11,991.0	$	12,013.8	$	13,162.1
Excluding:
Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Adjusted Operating Revenue	$	12,006.7	$	11,937.1	$	11,963.0
Income Before Income Tax	$	1,631.4	$	1,063.0	$	964.0
Excluding:
Net Investment Gains and Losses
Net Realized Investment Gain Related to Reinsurance Transaction	—		67.6		1,302.3
Net Investment Gain (Loss), Other	(15.7)		9.1		(103.2)
Total Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Items Related to Closed Block Individual Disability Reinsurance Transaction
Change in Benefit Reserves and Transaction Costs	—		(139.3)		(1,305.5)
Amortization of the Cost of Reinsurance	(63.8)		(79.1)		(2.6)
Total Items Related to Closed Block Individual Disability Reinsurance Transaction	(63.8)		(218.4)		(1,308.1)
Net Reserve Change Related to Reserve Assumption Updates	155.0		181.4		(169.0)
Impairment Loss on Internal-Use Software	—		(12.1)		—
Cost Related to Early Retirement of Debt	—		(67.3)		—
Impairment Loss on ROU Asset	—		(13.9)		(12.7)
Costs Related to Organizational Design Update	—		—		(23.3)
Adjusted Operating Income	$	1,555.9	$	1,116.6	$	1,278.0

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Commitments and Contingent Liabilities

12 Months Ended

Dec. 31, 2022

Commitments and Contingencies Disclosure [Abstract]

Commitments and Contingencies Disclosure

Commitments

See Notes 2 and 3 for further discussion on certain investment commitments of the Company.

Contingent Liabilities

We are a defendant in a number of litigation matters that have arisen in the normal course of business, including the matters discussed below. Further, state insurance regulatory authorities and other federal and state authorities regularly make inquiries and conduct investigations concerning our compliance with applicable insurance and other laws and regulations. Given the complexity and scope of our litigation and regulatory matters, it is not possible to predict the ultimate outcome of all pending investigations or legal proceedings or provide reasonable estimates of potential losses, except if noted in connection with specific matters.

In some of these matters, no specified amount is sought. In others, very large or indeterminate amounts, including punitive and treble damages, are asserted. There is a wide variation of pleading practice permitted in the United States courts with respect to requests for monetary damages, including some courts in which no specified amount is required and others which allow the plaintiff to state only that the amount sought is sufficient to invoke the jurisdiction of that court. Further, some jurisdictions permit plaintiffs to allege damages well in excess of reasonably possible verdicts. Based on our extensive experience and that of others in the industry with respect to litigating or resolving claims through settlement over an extended period of time, we believe that the monetary damages asserted in a lawsuit or claim bear little relation to the merits of the case, or the likely disposition value. Therefore, the specific monetary relief sought is not stated.

Unless indicated otherwise in the descriptions below, reserves have not been established for litigation and contingencies. An estimated loss is accrued when it is both probable that a liability has been incurred and the amount of the loss can be reasonably estimated.

Claims Handling Matters

We and our insurance subsidiaries, in the ordinary course of our business, are engaged in claim litigation where disputes arise as a result of a denial or termination of benefits. Most typically these lawsuits are filed on behalf of a single claimant or policyholder, and in some of these individual actions punitive damages are sought, such as claims alleging bad faith in the handling of insurance claims. For our general claim litigation, we maintain reserves based on experience to satisfy judgments and settlements in the normal course. We expect that the ultimate liability, if any, with respect to general claim litigation, after consideration of the reserves maintained, will not be material to our consolidated financial condition. Nevertheless, given the inherent unpredictability of litigation, it is possible that an adverse outcome in certain claim litigation involving punitive damages could, from time to time, have a material adverse effect on our consolidated results of operations in a period, depending on the results of operations for the particular period.

From time to time class action allegations are pursued where the claimant or policyholder purports to represent a larger number of individuals who are similarly situated. Since each insurance claim is evaluated based on its own merits, there is rarely a single act or series of actions which can properly be addressed by a class action. Nevertheless, we monitor these cases closely and defend ourselves appropriately where these allegations are made.

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Leases

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Lessee, Operating Leases

We lease certain buildings and equipment under various noncancellable operating lease agreements. In addition, we have sub-lease agreements on a limited number of our building lease agreements. We generally have the option to renew the majority of our building leases and equipment leases at the end of the lease term at the fair rental value at the time of renewal.

We do not have any lease agreements or sub-lease agreements that contain variable lease payments. In addition, we do not have lease agreements or sub-lease agreements that contain residual value guarantees or impose any financial restrictions or covenants with the lessors.

Operating lease information is as follows:

	Year Ended December 31
	2022			2021			2020
	(in millions of dollars)
Lease Cost
Operating Lease Cost	$	19.6		$	35.2		$	48.6
Sublease Income	(1.1)			(1.0)			(1.3)
Total Lease Cost	$	18.5		$	34.2		$	47.3
Other Information
Cash Paid for Amounts Included in the Measurement of Lease Liabilities	$	23.1		$	29.9		$	30.8
Weighted-Average Remaining Lease Term	6 years			6 years			6 years
Weighted-Average Discount Rate	4.32		%	4.45		%	4.37		%

As of December 31, 2022, aggregate undiscounted minimum lease payments and the reconciliation to our lease liability are as follows (in millions of dollars):

2023	$	18.2
2024	14.4
2025	11.1
2026	9.1
2027	8.3
2028 and Thereafter	17.4
Total	78.5
Less Imputed Interest	10.6
Lease Liability	$	67.9

The right-of-use asset was $37.7 million and $49.1 million at December 31, 2022 and 2021, respectively.

During 2021 and 2020, we recognized impairment losses of $13.9 million and $12.7 million, respectively, on the ROU asset related to one of our operating leases for office space that we do not plan to continue using to support our general operations. The impairment losses were recorded as a result of a decrease in the fair value of the ROU asset compared to its carrying value. The fair value of the ROU asset was determined based on a discounted cash flow model utilizing estimated market rates for sub-lease rentals. The impairment losses for each period are recorded within other expenses in the consolidated statements of income and are included within our Corporate segment.

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Statutory Financial Information

12 Months Ended

Dec. 31, 2022

Statutory Financial Information [Abstract]

Statutory Financial Information

Statutory Net Income, Capital and Surplus, and Dividends

Statutory net income for U.S. life insurance companies is reported in conformity with statutory accounting principles prescribed by the National Association of Insurance Commissioners (NAIC) and adopted by applicable domiciliary state laws. The commissioners of the states of domicile have the right to permit other specific practices that may deviate from prescribed practices. In connection with a financial examination of Unum America, which closed at the end of the second quarter of 2020, the Maine Bureau of Insurance (MBOI) concluded that Unum America’s long-term care statutory reserves were deficient by $2,100.0 million as of December 31, 2018, the financial statement date of the examination period. The amount reserves are deficient may increase or decrease over time based on changes in assumed reinvestment rates, policyholder inventories, rate increase activity, and the underlying growth in the locked in statutory reserve basis as well as updates to other long term actuarial assumptions. The MBOI granted permission to Unum America on May 1, 2020, to phase in the additional statutory reserves over seven years beginning with year-end 2020 and ending with year-end 2026. Additional information regarding the Unum America premium deficiency reserve (PDR) is as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Premium Deficiency Reserve
Gross Premium Deficiency Reserve1	$	2,851.0	$	2,977.0	$	2,290.0
Cumulative Gross Premium Deficiency Reserve Recognized	1,191.0		667.0		229.0
Remaining Premium Deficiency Reserve to be Recognized	$	1,660.0	$	2,310.0	$	2,061.0
1The gross PDR decreased by $126.0 million due primarily to premium rate increase activity and underlying growth in the locked-in statutory reserve basis during 2022. The gross PDR increased by $687.0 million and $190.0 million during 2021 and 2020, respectively, due primarily to changes in the assumed reinvestment rate. The increase for 2020 was from the original $2,100.0 million reserve deficiency as of December 31, 2018.

The phase in amounts for 2022, 2021, and 2020 were funded using cash flows from operations and capital contributions from Unum Group. This strengthening is incorporated by using explicitly agreed upon margins into our existing assumptions for annual statutory reserve adequacy testing. These actions add margin to Unum America's best estimate assumptions. Our long-term care reserves and financial results reported under generally accepted accounting principles are not affected by the MBOI’s examination conclusion. We plan to fund the additional statutory reserves with expected cash flows and capital contributions from Unum Group. If the permitted practice was not granted by the MBOI to phase in these additional statutory reserves, the impact to the risk-based capital ratio would have triggered a regulatory event. Our other traditional U.S. life insurance subsidiaries have no prescribed or permitted statutory accounting practices that differ materially from statutory accounting principles prescribed by the NAIC.

Unum America cedes certain blocks of business to Fairwind Insurance Company (Fairwind), which is an affiliated captive reinsurance subsidiary (captive reinsurer) domiciled in the United States, with Unum Group as the ultimate parent. This captive reinsurer was established for the limited purpose of reinsuring risks attributable to specified policies issued or reinsured by Unum America.

Fairwind, which is domiciled in the state of Vermont, is required to follow GAAP in accordance with Vermont reporting requirements for pure captive insurance companies, unless the commissioner permits the use of some other basis of accounting. Fairwind has permission from Vermont to follow accounting practices that are generally consistent with current NAIC statutory accounting principles for its insurance reserves and invested assets supporting reserves. All other assets and liabilities are accounted for in accordance with GAAP, as prescribed by Vermont, which includes the full recognition of deferred tax assets which are more likely than not to be realized. Statutory accounting principles have a stricter limitation for the recognition of deferred tax assets. The impact of following the prescribed and permitted practices of Vermont rather than statutory accounting principles prescribed by the NAIC resulted in higher capital and surplus for Fairwind of approximately $351 million and $360 million as of December 31, 2022 and 2021 respectively. The 2022, 2021, and 2020 results for Fairwind include the $524.0 million, $438 million, and $229 million increases to long-term care statutory reserves assumed from Unum America.

In December 2020, prior to entering into the reinsurance transaction with Commonwealth, Provident, Paul Revere Life, and Unum America recaptured their respective reinsurance agreements with Northwind Reinsurance Company (Northwind Re), a wholly-owned domestic special purpose reinsurance subsidiary. See Note 12 for further discussion regarding the reinsurance transaction with Commonwealth.

Northwind Re was established for the limited purpose of reinsuring risks attributable to specified policies issued or reinsured by the aforementioned companies, and had no material state prescribed accounting practices that differ from statutory accounting principles prescribed by the NAIC. As a result of the recapture of the reinsurance agreements during 2020, no insurance risk remained in Northwind Re. In 2021, Northwind Re obtained a Certificate of Dormancy from the Vermont Department of Financial Regulation authorizing it to exist as a dormant captive insurance company, leaving Fairwind as the only remaining active captive reinsurer. During 2022, Northwind Re was merged with one of our non-insurance U.S. holding companies, Northwind Holdings, with Northwind Holdings remaining as the surviving company. Subsequently during 2022, Northwind Holdings was merged into Unum Group.

The operating results and capital and surplus of our traditional U.S. life insurance subsidiaries and our captive reinsurers, prepared in accordance with prescribed or permitted accounting practices of the NAIC or states of domicile, are presented separately below.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Combined Net Income (Loss)
Traditional U.S. Life Insurance Subsidiaries	$	965.4	$	779.5	$	646.8
Captive Reinsurers	$	(432.2)	$	(159.0)	$	(201.0)
Combined Net Gain (Loss) from Operations, After Tax
Traditional U.S. Life Insurance Subsidiaries	$	965.4	$	681.1	$	726.2
Captive Reinsurers	$	(428.6)	$	(247.4)	$	(149.4)

	December 31
	2022		2021
	(in millions of dollars)
Combined Capital and Surplus
Traditional U.S. Life Insurance Subsidiaries	$	3,816.3	$	3,950.3
Captive Reinsurers	$	1,229.6	$	1,258.4

Solvency II, an European Union directive that is part of retained U.K. law pursuant to the European Union (Withdrawal) Act 2018, prescribes capital requirements and risk management standards for the European insurance industry. As derived from the most recent annual financial statements for December 31, 2021, based on Solvency II requirements, regulatory net gain and own funds available of our United Kingdom insurance subsidiary, Unum Limited, were £121.8 million and £631.0 million, respectively.

Risk-based capital (RBC) standards for U.S. life insurance companies are prescribed by the NAIC. The domiciliary states of our U.S. insurance subsidiaries have all adopted a version of the RBC model formula of the NAIC, which prescribes a system for assessing the adequacy of statutory capital and surplus for all life and health insurers. The basis of the system is a risk-based formula that applies prescribed factors to the various risk elements in a life and health insurer's business to report a minimum capital requirement proportional to the amount of risk assumed by the insurer. The life and health RBC formula is designed to measure annually (i) the risk of loss from asset defaults and asset value fluctuations, (ii) the risk of loss from adverse mortality and morbidity experience, (iii) the risk of loss from mismatching of asset and liability cash flow due to changing interest rates, and (iv) business risks. The formula is used as an early warning tool to identify companies that are potentially inadequately capitalized. State insurance laws grant insurance regulators the authority to require various actions by, or take various actions

against, insurers whose total adjusted capital does not meet or exceed certain RBC levels. The total adjusted capital of each of our U.S. insurance subsidiaries at December 31, 2022 is in excess of those RBC levels.

Restrictions under applicable state insurance laws limit the amount of dividends that can be paid to a parent company from its insurance subsidiaries in any 12-month period without prior approval by regulatory authorities. For life insurance companies domiciled in the U.S., that limitation generally equals, depending on the state of domicile, either ten percent of an insurer's statutory surplus with respect to policyholders as of the preceding year end or the statutory net gain from operations, excluding net realized capital gains and losses, of the preceding year. The payment of dividends to a parent company from a life insurance subsidiary is generally further limited to the amount of unassigned funds.

Based on the restrictions under current law, approximately $991 million is available, without prior approval by regulatory authorities, during 2023 for the payment of dividends to Unum Group from its traditional U.S. life insurance subsidiaries. The ability of our captive insurer to pay dividends to Unum Group will depend on the satisfaction of applicable regulatory requirements and on the performance of the business reinsured by Fairwind.

We also have the ability to receive dividends from our foreign subsidiaries, primarily in the U.K., for which the payment may be subject to applicable insurance company regulations and capital guidance. Approximately £80 million is considered distributable from Unum Limited during 2023, subject to local solvency standards and regulatory approval.

Deposits

At December 31, 2022 and 2021, our U.S. life insurance subsidiaries had on deposit with U.S. regulatory authorities securities with a book value of $118.8 million and $117.7 million, respectively, held for the protection of policyholders.

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Schedule I - Summary of Investments, Other Than Investments in Related Parties Schedule I - Summary of Investments, Other Than Investments in Related Parties

12 Months Ended

Dec. 31, 2022

SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Abstract]

Summary of Investments, Other Than Investments in Related Parties

SCHEDULE I--SUMMARY OF INVESTMENTS -

OTHER THAN INVESTMENTS IN RELATED PARTIES

as of December 31, 2022

Unum Group and Subsidiaries

Type of Investment	Cost or Amortized Cost (1)		Fair Value		Amount shown on the balance sheet
	(in millions of dollars)
Fixed Maturity Securities:
Bonds
United States Government and Government Agencies and Authorities	$	503.8	$	498.2	$	498.2
States, Municipalities, and Political Subdivisions	4,006.0		3,457.2		3,457.2
Foreign Governments	908.1		827.1		827.1
Public Utilities	5,170.9		4,956.9		4,956.9
Mortgage/Asset-Backed Securities	592.1		573.3		573.3
All Other Corporate Bonds	26,640.3		24,524.6		24,524.6
Redeemable Preferred Stocks	4.0		3.5		3.5
Total Fixed Maturity Securities	37,825.2		34,840.8		34,840.8
Mortgage Loans	2,444.7				2,435.4
Policy Loans	3,601.2				3,601.2
Other Long-term Investments
Derivatives	—				89.1		(2)
Perpetual Preferred Equity Securities	23.1				25.8		(3)
Private Equity Partnerships	1,032.2				1,194.3		(3)
Miscellaneous Long-term Investments	130.9				130.9
Short-term Investments	1,394.8				1,394.8
Total Investments	$	46,452.1			$	43,712.3

(1)The amortized cost for fixed maturity securities and mortgage loans represents original cost reduced by repayments, write-downs from declines in fair value, amortization of premiums, and/or accretion of discounts. The amortized cost for these investments does not include allowance for expected credit losses.

(2)Derivatives are carried at fair value.

(3)The difference between amortized cost and carrying value for private equity partnerships and perpetual preferred equity securities primarily results from changes in the partnership owner's equity and the security's market valuation since acquisition, respectively.

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Schedule II Condensed Finacial Information of Registrant

12 Months Ended

Dec. 31, 2022

Condensed Financial Information Disclosure [Abstract]

Condensed Financial Information of Parent Company Only Disclosure

SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT

Unum Group (Parent Company)

BALANCE SHEETS

	December 31
	2022		2021
	(in millions of dollars)
Assets
Fixed Maturity Securities - at fair value (amortized cost: $748.1; $826.4)	$	657.7	$	820.8
Other Long-term Investments	19.3		10.3
Short-term Investments	845.8		629.5
Investment in Subsidiaries	11,278.2		13,711.1
Deferred Income Tax	114.9		144.5
Other Assets	555.5		508.1
Total Assets	$	13,471.4	$	15,824.3
Liabilities and Stockholders' Equity
Liabilities
Short-term Debt	$	2.0	$	—
Long-term Debt	3,427.8		3,442.2
Pension and Postretirement Benefits	352.6		507.1
Other Liabilities	491.5		458.6
Total Liabilities	4,273.9		4,407.9
Stockholders' Equity
Common Stock, $0.10 par
Authorized: 725,000,000 shares
Issued: 308,306,490 and 307,334,853 shares	30.8		30.7
Additional Paid-in Capital	2,441.0		2,408.1
Accumulated Other Comprehensive Income (Loss)	(2,756.6)		354.1
Retained Earnings	12,912.1		11,853.2
Treasury Stock - at cost: 110,551,977 and 104,820,670 shares	(3,429.8)		(3,229.7)
Total Stockholders' Equity	9,197.5		11,416.4
Total Liabilities and Stockholders' Equity	$	13,471.4	$	15,824.3

SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Continued)

Unum Group (Parent Company)

STATEMENTS OF OPERATIONS

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Cash Dividends from Subsidiaries	$	1,306.6	$	909.8	$	974.6
Non-Cash Dividends from Subsidiaries	23.0		719.6		—
Other Income	81.8		53.5		51.7
Total Revenue	1,411.4		1,682.9		1,026.3
Interest and Debt Expense	188.5		185.9		187.1
Cost Related to Early Retirement of Debt	4.2		67.3		—
Other Expenses	35.6		39.1		51.1
Total Expenses	228.3		292.3		238.2
Income of Parent Company Before Income Tax	1,183.1		1,390.6		788.1
Income Tax Expense (Benefit)	14.7		(24.1)		(15.3)
Income of Parent Company	1,168.4		1,414.7		803.4
Equity in Undistributed Earnings (Loss) of Subsidiaries	145.8		(590.5)		(10.4)
Net Income	1,314.2		824.2		793.0
Other Comprehensive Income (Loss), Net of Tax	(3,110.7)		(20.1)		336.9
Comprehensive Income (Loss)	$	(1,796.5)	$	804.1	$	1,129.9

SCHEDULE II--CONDENSED FINANCIAL INFORMATION OF REGISTRANT (Continued)

Unum Group (Parent Company)

STATEMENTS OF CASH FLOWS

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Cash Provided by Operating Activities	$	1,250.2	$	861.0	$	964.0
Cash Flows from Investing Activities
Proceeds from Sales and Maturities of Fixed Maturity Securities	192.1		245.5		138.8
Proceeds from Sales and Maturities of Other Investments	7.4		20.1		46.6
Purchase of Fixed Maturity Securities	(102.7)		(2.0)		(384.7)
Purchase of Other Investments	(32.0)		(0.9)		(22.0)
Net Sales (Purchases) of Short-term Investments	(209.6)		(465.0)		440.6
Cash Distributions to Subsidiaries	(540.2)		(300.9)		(965.5)
Net Purchases of Property and Equipment	(94.0)		(91.3)		(81.6)
Cash Used by Investing Activities	(779.0)		(594.5)		(827.8)
Cash Flows from Financing Activities
Short-term Debt Repayment	—		—		(400.0)
Issuance of Long-term Debt	349.2		588.1		494.1
Long-term Debt Repayment	(364.0)		(500.0)		—
Cost Related to Early Retirement of Debt	(3.6)		(62.8)		—
Issuance of Common Stock	4.0		3.4		4.4
Repurchase of Common Stock	(200.1)		(50.0)		—
Dividends Paid to Stockholders	(254.2)		(239.4)		(231.9)
Other, Net	0.7		(1.6)		(1.4)
Cash Used by Financing Activities	(468.0)		(262.3)		(134.8)
Increase in Cash	$	3.2	$	4.2	$	1.4

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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

Segment	Deferred Acquisition Costs		Reserves for Future Policy Contract Benefits		Unearned Premiums		Policy and Contract Benefits
	(in millions of dollars)
December 31, 2022
Unum US	$	1,089.4	$	9,129.9	$	50.5	$	1,245.8
Unum International	36.6		2,074.7		130.4		165.2
Colonial Life	1,126.3		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 International	35.4		2,765.5		131.8		171.2
Colonial Life	1,076.3		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

Segment	Premium 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 International	718.8		170.1		564.8		7.6		190.4		504.1
Colonial Life	1,702.0		152.7		803.1		288.5		389.6		1,221.8
Closed Block	944.3		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 International	717.0		132.7		556.2		8.0		180.4		520.6
Colonial Life	1,690.2		172.0		910.4		259.1		364.5		1,223.3
Closed Block	995.8		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 International	652.8		104.6		500.9		7.4		173.0		456.0
Colonial Life	1,712.0		155.7		906.5		257.7		369.2		1,252.4
Closed Block	994.4		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.

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Schedule IV Reinsurance

12 Months Ended

Dec. 31, 2022

SEC Schedule, 12-17, Insurance Companies, Reinsurance [Abstract]

Supplemental Schedule of Reinsurance Premiums for Insurance Companies

SCHEDULE IV--REINSURANCE

Unum Group and Subsidiaries

	Gross Amount		Ceded to Other Companies		Assumed from Other Companies		Net Amount		Percentage Amount Assumed to Net
	(in millions of dollars)
Year Ended December 31, 2022
Life Insurance in Force	$	1,057,312.2	$	35,773.9	$	931.9	$	1,022,470.2	0.1	%
Premium Income:
Life Insurance	$	2,711.2	$	155.1	$	6.5	$	2,562.6	0.3	%
Accident, Health, and Other Insurance	7,189.3		200.7		72.2		7,060.8		1.0	%
Total	$	9,900.5	$	355.8	$	78.7	$	9,623.4	0.8	%
Year Ended December 31, 2021
Life Insurance in Force	$	1,007,562.2	$	37,794.6	$	920.3	$	970,687.9	0.1	%
Premium Income:
Life Insurance	$	2,550.7	$	150.2	$	7.6	$	2,408.1	0.3	%
Accident, Health, and Other Insurance	7,192.1		202.2		83.0		7,072.9		1.2	%
Total	$	9,742.8	$	352.4	$	90.6	$	9,481.0	1.0	%
Year Ended December 31, 2020
Life Insurance in Force	$	979,755.7	$	41,550.9	$	896.4	$	939,101.2	0.1	%
Premium Income:
Life Insurance	$	2,536.8	$	141.9	$	8.0	$	2,402.9	0.3	%
Accident, Health, and Other Insurance	7,085.1		196.0		86.1		6,975.2		1.2	%
Total	$	9,621.9	$	337.9	$	94.1	$	9,378.1	1.0	%

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Schedule V Valuation and Qualifying Accounts

12 Months Ended

Dec. 31, 2022

SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]

Schedule of Valuation and Qualifying Accounts Disclosure

SCHEDULE V--VALUATION AND QUALIFYING ACCOUNTS

Unum Group and Subsidiaries

Description	Balance at Beginning of Year1		Additions Charged to Costs and Expenses		Additions Charged to Other Accounts2		Deductions3		Balance at End of Year
	(in millions of dollars)
Year Ended December 31, 2022
Allowance for expected credit losses (deducted from accounts and premiums receivable)	$	34.2	$	10.8	$	—	$	12.5	$	32.5
Allowance for expected credit losses (deducted from reinsurance recoverable)	$	2.3	$	—	$	—	$	0.6	$	1.7
Year Ended December 31, 2021
Allowance for expected credit losses (deducted from accounts and premiums receivable)	$	38.8	$	18.2	$	—	$	22.8	$	34.2
Allowance for expected credit losses (deducted from reinsurance recoverable)	$	11.7	$	0.7	$	—	$	10.1	$	2.3
Year Ended December 31, 2020
Real Estate reserve (deducted from other long-term investments)	$	0.3	$	—	$	—	$	0.3	$	—
Allowance for expected credit losses (deducted from accounts and premiums receivable)	$	23.8	$	34.2	$	0.1	$	19.3	$	38.8
Allowance for doubtful accounts (deducted from reinsurance recoverable)	$	1.8	$	10.1	$	—	$	0.2	$	11.7

1 In 2020, ASC 326 "Financial Instruments - Credit Losses" was adopted resulting in a beginning balance adjustment of $13.5 million to increase the Allowance for expected credit losses (deducted from accounts and premiums receivable) and a $1.8 million beginning balance adjustment to increase the Allowance for expected credit losses (deducted from reinsurance recoverable).

2 Additions charged to other accounts are comprised of amounts related to fluctuations in the foreign currency exchange rate.

3 Deductions include amounts deemed to reduce exposure of expected losses on premium and accounts receivables and reinsurance recoverable, probable losses on Real Estate reserve, amounts deemed uncollectible, and amounts related to fluctuations in the foreign currency exchange rate.

Certain items not reported above include the allowance for expected credit losses on mortgage loans, the allowance for credit losses on fixed maturity securities, and the deferred tax asset valuation allowance. See Notes 3 and 7 of the "Notes to Consolidated Financial Statements" contained herein in Item 8 for a discussion of these items.

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Signficant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2022

Accounting policies and error corrections [Abstract]

Basis of Presentation

Basis of Presentation: The accompanying consolidated financial statements of Unum Group and its subsidiaries (the Company) have been prepared in accordance with U.S. generally accepted accounting principles (GAAP). Such accounting principles differ from statutory accounting principles (see Note 16). Intercompany transactions have been eliminated.

Use of Estimates

Use of Estimates: The preparation of financial statements in conformity with GAAP requires us to make estimates and assumptions that affect amounts reported in the financial statements and accompanying notes. Such estimates and assumptions could change in the future as more information becomes known, which could impact the amounts reported and disclosed herein.

In accordance with standard practice, we regularly review the methodology used in the development of all key estimates. As a result of this review, in 2022, we updated our estimate of the unearned premium reserve for certain of our product lines to utilize a gross unearned premium reserve rather than a net unearned premium reserve. The effect of this change in estimate was to decrease 2022 premium income by $13.4 million and decrease commissions by $1.0 million. This resulted in a decrease to net income of $9.8 million and a decrease to both basic and diluted earnings per share by $0.05.

Fixed Maturity Securities

Fixed Maturity Securities: Fixed maturity securities include long-term bonds and redeemable preferred stocks. Our fixed maturity securities are classified as available-for-sale and reported at fair value. Changes in the fair value of available-for-sale fixed maturity securities, except for amounts related to impairment and credit losses recognized in earnings, are reported as a component of other comprehensive income. These amounts are net of income tax and valuation adjustments to deferred acquisition costs and reserves for future policy and contract benefits which would have been recorded had the related unrealized gain or loss on these securities been realized. Realized investment gains or losses are based upon specific identification of the investments sold.

Interest income is recorded as part of net investment income when earned, using an effective yield method giving effect to amortization of premium and accretion of discount. Included within fixed maturity securities are mortgage-backed and asset-backed securities.  We recognize investment income on these securities using a constant effective yield based on projected prepayments of the underlying loans and the estimated economic life of the securities.  Actual prepayment experience is reviewed periodically, and effective yields are recalculated when differences arise between prepayments originally projected and the actual prepayments received and currently projected.  The effective yield is recalculated on a retrospective basis, and the adjustment is reflected in net investment income. For fixed maturity securities on which collection of investment income is uncertain, we discontinue the accrual of investment income and recognize investment income when interest and dividends are received. Payment terms specified for fixed maturity securities may include a prepayment penalty for unscheduled payoff of the investment.  Prepayment penalties are recognized as investment income when received.

In determining when a decline in fair value below amortized cost of a fixed maturity security is a credit loss, we evaluate available information, both positive and negative, in reaching our conclusions. In particular, we consider the strength of the issuer's balance sheet, its debt obligations and near-term funding requirements, cash flow and liquidity, the profitability of its core businesses, the availability of marketable assets which could be sold to increase liquidity, its industry fundamentals and regulatory environment, and its access to capital markets. Although all available and applicable factors are considered in our analysis, our expectation of recovering the entire amortized cost basis of the security, whether we intend to sell the security, whether it is more likely than not that we will be required to sell the security before recovery of its amortized cost, and whether the security is current on principal and interest payments are the most critical factors in determining whether impairments represent credit losses. The significance of the decline in value is also an important factor, but we generally do not record an impairment loss based solely on this factor, since often other more relevant factors will impact our evaluation of a security.

For securities with a decline in fair value below amortized cost which we intend to sell or more likely than not will be required to sell before recovery in value, the amortized cost of the investment is written down to fair value through earnings, and an impairment loss is recognized in the current period. For securities that we believe are impaired and which we do not intend to

sell and it is not more likely than not that we will be required to sell before recovery in value, we calculate an allowance for credit losses recognized in earnings which generally represents the difference between the amortized cost of the security and the present value of our best estimate of cash flows expected to be collected, discounted using the effective interest rate implicit in the security at the date of acquisition and limited by the difference between amortized cost and fair value of the security. For fixed maturity securities for which we have recognized an allowance for credit loss through earnings, if through subsequent evaluation there is a significant increase in expected cash flows, the allowance is reduced and is recognized as a reduction to credit losses in the current period. When an allowance for credit losses on a fixed maturity security is recognized, we designate non-accrual status for those securities.  We reverse all previously accrued interest through interest income and use a cash basis method for recognizing any future payments received. See Notes 2 and 3.

Mortgage Loans

Mortgage Loans: Mortgage loans are generally held for investment and are carried at amortized cost less an allowance for expected credit losses. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. Prepayment penalties are recognized as investment income when received. For mortgage loans on which collection of interest income is uncertain, we discontinue the accrual of interest and recognize it in the period when an interest payment is received. We typically do not resume the accrual of interest on mortgage loans on nonaccrual status until there are significant improvements in the underlying financial condition of the borrower. We consider a loan to be delinquent if full payment is not received in accordance with the contractual terms of the loan.

We evaluate each of our mortgage loans individually for impairment and assign an internal credit quality rating based on a comprehensive rating system used to evaluate the credit risk of the loan. Although all available and applicable factors are considered in our analysis, loan-to-value and debt service coverage ratios are the most critical factors in determining impairment. We estimate an allowance for credit losses that we expect to incur over the life of our mortgage loans using a probability of default method. For each loan, we estimate the probability that the loan will default before its maturity (probability of default) and the amount of the loss if the loan defaults (loss given default). These two factors result in an expected loss percentage that is applied to the amortized cost of each loan to determine the expected credit loss. As we are the original underwriter of the mortgage loans, the amortized cost generally equals the principal amount of the loan. We measure losses on defaults of our mortgage loans as the excess amortized cost of the mortgage loan over the fair value of the underlying collateral in the event that we foreclose on the loan or over the expected future cash flows of the loan if we retain the mortgage loan until payoff. We do not purchase mortgage loans with existing credit impairments.

In estimating the probability of default, we consider historical experience, current market conditions, and reasonable and supportable forecasts about the future market conditions. We utilize our historical loan experience in combination with a large third-party industry database for a period of time that aligns with the average life of our loans based on the maturity dates of the loans and prepayment experience. Our model utilizes an industry database of the historical loss experience based on our actual portfolio characteristics such as loan-to-value, debt service coverage, collateral type, geography, and late payment history. In addition, because we actively manage our portfolio, we may extend the term of a loan in certain situations and will accordingly extend the maturity date in the estimate of probability of default. In estimating the loss given default, we primarily consider the type and value of collateral and secondarily the expected liquidation costs and time to recovery.

The primary market factors that we consider in our forecast of future market conditions are gross domestic product, unemployment rates, interest rates, inflation, commercial real estate values, household formation, and retail sales. We also forecast certain loan specific factors such as growth in the fair value and net operating income of collateral by property type. We include our estimate of these factors over a two-year period and for the remainder of the loans’ estimated lives, adjusted for estimated prepayments. Past the two-year forecast period, we revert to the historical assumptions ratably by the end of the fifth year of the loan after which we utilize only historical assumptions.

We utilize various scenarios to estimate our allowance for expected losses ranging from a base case scenario that reflects normal market conditions to a severe case scenario that reflects adverse market conditions. We will adjust our allowance each period to utilize the scenario or weighting of the scenarios that best reflects our view of current market conditions. Additions and reductions to our allowance for credit losses on mortgage loans are reported as a component of net investment gains and losses. See Note 3.

Policy Loans

Policy Loans: Policy loans are presented at the unpaid balances directly related to policyholders. Interest income is accrued on the principal amount of the loan based on the loan's contractual interest rate. Included in policy loans are $3,312.5 million and $3,373.7 million of policy loans ceded to reinsurers at December 31, 2022 and 2021, respectively.

Investments

Other Long-term Investments: Other long-term investments are comprised primarily of private equity partnerships, real estate, perpetual preferred stock, common stock, and tax credit partnerships.

Our investments in private equity partnerships are passive in nature and represent funds that are primarily invested in private credit, private equity, and real assets. We account for our investments in these partnerships using either the equity method or at fair value through net income depending on the level of ownership and the degree of our influence over partnership operating and financial policies. For investments in partnerships accounted for under the equity method, we report our investments at our share of the partnership's net asset value (NAV) and record our portion of partnership earnings as a component of net investment income. For investments in partnerships accounted for at fair value through net income, we also report our investments at our share of the partnership's NAV as a practical expedient for fair value with increases or decreases recorded as a component of net investment income. Distributions received from the funds arise from income generated by the underlying investments as well as the liquidation of the underlying investments and there is generally not a public market for these investments.

Investment real estate is primarily comprised of property held for the production of income and property held for sale. Property held for the production of income is carried at cost less accumulated depreciation and any write-downs to fair value for impairment losses. Depreciation is recorded on a straight-line basis over the estimated useful life of the asset. A review for impairment is made whenever events or circumstances indicate that the carrying value may not be recoverable. An impairment loss is recognized when the carrying value of the property exceeds the expected undiscounted cash flows generated from the property, at which point the carrying value is written down to an estimated fair value. Real estate held for sale is carried at the lower of depreciated cost or fair value less estimated selling costs and is not further depreciated once classified as such.

Our perpetual preferred stocks are valued at fair value, based on quoted market prices, where available. For preferred stocks not actively traded, fair values are estimated using values obtained from independent pricing services. Our investments in common stock are valued at fair value. Our shares of Federal Home Loan Bank (FHLB) common stock are carried at cost, which approximates fair value.

Tax credit partnerships in which we have invested were formed for the purpose of investing in the construction and rehabilitation of low-income housing.  Because the partnerships are structured such that there is no return of principal, the primary sources of investment return from our tax credit partnerships are tax credits and tax benefits derived from passive losses on the investments, both of which may exhibit variability over the life of the investment.  These partnerships are accounted for using either the proportional or the effective yield method, depending primarily on whether the tax credits are guaranteed through a letter of credit, a tax indemnity agreement, or another similar arrangement. Tax credits received from these partnerships are reported in our consolidated statements of income as either a reduction of premium tax or a reduction of income tax. The amortization of the principal amount invested in these partnerships is reported as a component of either premium tax or income tax.

See Notes 2 and 3 for further discussion of our other long-term investments.

Short-term Investments: Short-term investments are carried at cost. Short-term investments include investments maturing within one year of purchase, such as corporate commercial paper and Treasury bills, bank term deposits, and other cash accounts and cash equivalents earning interest.

Cash and Bank Deposits

Cash and Bank Deposits: Cash and bank deposits include cash on hand and non-interest bearing cash and deposit accounts.

Derivative Financial Instruments

Derivative Financial Instruments: Derivative financial instruments (including certain derivative instruments embedded in other contracts) are recognized as either other long-term investments or other liabilities in our consolidated balance sheets and are reported at fair value. The accounting for a derivative depends on whether it has been designated and qualifies as part of a hedging relationship, and further, on the type of hedging relationship. To qualify for hedge accounting, at the inception of the hedging transaction, we formally document the risk management objective and strategy for undertaking the hedging transaction, as well as the designation of the hedge as either a fair value hedge or a cash flow hedge. Included in this documentation is how the hedging instrument is expected to hedge the designated risk(s) related to specific assets or liabilities on the balance sheet or

to specific forecasted transactions as well as a description of the method that will be used to retrospectively and prospectively assess the hedging instrument's effectiveness.

A derivative designated as a hedging instrument must be assessed as being highly effective in offsetting the designated risk(s) of the hedged item. Hedge effectiveness is formally assessed at inception and periodically throughout the life of the designated hedging relationship, using qualitative and quantitative methods. Qualitative methods include comparison of critical terms of the derivative to the hedged item. Quantitative methods include regression or other statistical analysis of changes in fair value or cash flows associated with the hedge relationship.

Changes in the fair value of a derivative designated as a fair value hedge and changes in the fair value of the hedged item attributable to the risk being hedged are recognized in earnings as a component of net investment gain or loss during the period of change in fair value.  For gains or losses on the derivative instrument that are excluded from the assessment of hedge effectiveness, those gains and losses are recognized in other comprehensive income or loss and amortized into earnings in the same income statement line as the related hedged item. The gain or loss on the termination of a fair value hedge is recognized in earnings as a component of net investment gain or loss during the period in which the termination occurs. When interest rate swaps are used in hedge accounting relationships, periodic settlements are recorded in the same income statement line as the related settlements of the hedged items.

Changes in the fair value of a derivative designated as a cash flow hedge are reported in other comprehensive income and reclassified into earnings and reported on the same income statement line item as the hedged item and in the same period or periods during which the hedged item affects earnings. The gain or loss on the termination of an effective cash flow hedge is reported in other comprehensive income and reclassified into earnings and reported on the same income statement line item as the hedged item and in the same period or periods during which the hedged item affects earnings.

Gains or losses on the termination of ineffective fair value or cash flow hedges are reported in earnings as a component of net investment gain or loss. In the event a hedged item is disposed of or the anticipated transaction being hedged is no longer likely to occur, we will terminate the related derivative and recognize the gain or loss on termination in current earnings as a component of net investment gain or loss. In the event a hedged item is disposed of subsequent to the termination of the hedging transaction, we reclassify any remaining gain or loss on the hedge out of accumulated other comprehensive income into earnings as a component of the same income statement line item wherein we report the gain or loss on disposition of the hedged item.

For a derivative not designated as a hedging instrument, changes in the fair value of the derivative, together with the payment of periodic fees, if applicable, are recognized in the same income statement line item as the hedged item during the period of change in fair value.

Cash flow activity from the settlement of derivative contracts is reported in the consolidated statements of cash flows as a component of proceeds from sales and maturities of other investments.

In our consolidated balance sheets, we do not offset fair value amounts recognized for derivatives executed with the same counterparty under a master netting agreement and fair value amounts recognized for the right to reclaim cash collateral or the obligation to return cash collateral arising from those master netting agreements. See Notes 2, 3, and 4.

Fair Value Measurement

Fair Value Measurement: Certain assets and liabilities are reported at fair value in our consolidated balance sheets and in our notes to our consolidated financial statements. We define fair value as the price that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants at the measurement date. Therefore, fair value represents an exit price, not an entry price. The exit price objective applies regardless of our intent and/or ability to sell the asset or transfer the liability at the measurement date. Assets or liabilities with readily available actively quoted prices or for which fair value can be measured from actively quoted prices in active markets generally have more pricing observability and less judgment utilized in measuring fair value. When actively quoted prices are not available, fair values are based on quoted prices in markets that are not active, quoted prices for similar but not identical assets or liabilities, or other observable inputs. If observable inputs are not available, unobservable inputs and/or adjustments to observable inputs requiring management judgment are used to determine fair value. We categorize our assets and liabilities measured at estimated fair value into a three-level hierarchy, based on the significance of the inputs. The fair value hierarchy gives the highest priority to inputs which are unadjusted and represent quoted prices in active markets for identical assets or liabilities (Level 1) and the lowest priority to unobservable inputs (Level 3). See Note 2.

Allowance for Credit Losses on Premiums Receivable

Allowance for Credit Losses on Premiums Receivable: We establish an allowance for credit losses on premiums receivable, which is deducted from the gross amount of our receivable balance, to present the net amount we expect to collect on this asset. The allowance is forward-looking in nature and is calculated based on considerations regarding both historical events and future expectations. Periodic changes in the allowance are recorded through earnings.

The allowance on our premiums receivable is primarily determined using an aging analysis as well as historical lapse and delinquency rates by line of business, adjusted for key factors that may impact our future expectation of premium receipts such as changes in customer demographics, business practices, economic conditions, and product offerings. We write off premiums receivable amounts when determined to be uncollectible, which is based on various factors, including the aging of premiums receivable past the due date and specific communication with customers. At December 31, 2022 and 2021, the allowance for expected credit losses on premium receivables was $32.5 million and $34.2 million, respectively, on gross premium receivables of $557.6 million and $530.7 million, respectively. The allowance decreased $1.7 million during the year ended December 31, 2022, and was driven primarily by improvements in the age of premiums receivable. The allowance decreased $4.6 million during the year ended December 31, 2021, driven primarily by improvements in the age of premiums receivable and improvements in unemployment levels.

Deferred Acquisition Costs

Deferred Acquisition Costs: Incremental direct costs associated with the successful acquisition of new or renewal insurance contracts have been deferred. Such costs include commissions, other agency compensation, certain selection and policy issue expenses, and certain field expenses. Acquisition costs that do not vary with the production of new business, such as commissions on group products which are generally level throughout the life of the policy, are excluded from deferral. Deferred acquisition costs are subject to recoverability testing at the time of policy issue and loss recognition testing in subsequent years.

Deferred acquisition costs related to non-interest sensitive policies are amortized in proportion to the premium income we expect to receive over the lives of the policies. Deferred acquisition costs related to interest sensitive policies are amortized over the lives of the policies in relation to the present value of estimated gross profits from surrender charges, mortality margins, investment returns, and expense margins. Deviations from projections result in a change to the rate of amortization in the period during which such events occur. Generally, the amortization periods for these policies approximate the estimated lives of the policies.

For certain products, policyholders can elect to modify product benefits, features, rights, or coverages by exchanging a contract for a new contract or by amendment, endorsement, or rider to a contract, or by the election of a feature or coverage within a contract. These transactions are known as internal replacement transactions. Internal replacement transactions wherein the modification does not substantially change the policy are accounted for as continuations of the replaced contracts. Unamortized deferred acquisition costs from the original policy continue to be amortized over the expected life of the new policy, and the costs of replacing the policy are accounted for as policy maintenance costs and expensed as incurred. Internal replacement transactions, principally on group contracts, that result in a policy that is substantially changed are accounted for as an extinguishment of the original policy and the issuance of a new policy. Unamortized deferred acquisition costs on the original policy that was replaced are immediately expensed, and the costs of acquiring the new policy are capitalized and amortized in accordance with our accounting policies for deferred acquisition costs.

Loss recognition and recoverability testing is performed on an annual basis, or more frequently if appropriate, using best estimate assumptions as to future experience as of the date of the test. Insurance contracts are grouped for each major product line within a segment when we perform the loss recognition and recoverability tests. If loss recognition or recoverability testing indicates that deferred acquisition costs are not recoverable, the deficiency is charged to expense.

Goodwill

Goodwill: Goodwill is the excess of the amount paid to acquire a business over the fair value of the net assets acquired. We review the carrying amount of goodwill for impairment on an annual basis, or more frequently if events or changes in circumstances indicate that the carrying amount might not be recoverable. Goodwill impairment testing compares the fair value of a reporting unit with its carrying amount, including goodwill.  If the fair value of the reporting unit to which the goodwill relates is less than the carrying amount of the reporting unit, an impairment charge is recognized for the amount by which the carrying amount exceeds the fair value of the reporting unit in an amount not to exceed the total amount of goodwill allocated to the reporting unit.

Property and Equipment

Property and Equipment: Property and equipment is reported at cost less accumulated depreciation, which is calculated on the straight-line method over the estimated useful life. The accumulated depreciation for property and equipment was $1,328.7 million and $1,259.6 million as of December 31, 2022 and 2021, respectively.

Value of Business Acquired

Value of Business Acquired: Value of business acquired represents the present value of future profits recorded in connection with the acquisition of a block of insurance policies. The asset is amortized based upon expected future premium income for non-interest sensitive insurance policies and estimated future gross profits from surrender charges, mortality margins, investment returns, and expense margins for interest sensitive insurance policies. The value of business acquired, which is included in other assets in our consolidated balance sheets, was $62.9 million and $73.1 million at December 31, 2022 and 2021, respectively. The accumulated amortization for value of business acquired was $150.3 million and $157.7 million as of December 31, 2022 and 2021, respectively.

The amortization of value of business acquired, which is included in other expenses in the consolidated statements of income, was $4.9 million, $5.7 million, and $6.1 million for the years ended December 31, 2022, 2021, and 2020, respectively. We periodically review the carrying amount of value of business acquired using the same methods used to evaluate deferred acquisition costs.

Policy and Contract Benefits

Policy and Contract Benefits: Policy and contract benefits represent amounts paid and expected to be paid based on reported losses and estimates of incurred but not reported losses for non-interest sensitive life and accident and health products. For interest sensitive products, benefits are the amounts paid and expected to be paid on insured claims in excess of the policyholders' policy fund balances.

Reserves for Policy and Contract Benefits

Reserves for Future Policy and Contract Benefits: Policy reserves represent future policy and contract benefits for claims not yet incurred. Policy reserves for non-interest sensitive life and accident and health products are determined using the net level premium method. The reserves are calculated based upon assumptions as to interest, persistency, morbidity, and mortality that were appropriate at the date of issue. Discount rate assumptions are based on actual and expected net investment returns. Persistency assumptions are based on our actual historical experience adjusted for future expectations. Claim incidence and claim resolution rate assumptions related to morbidity and mortality are based on actual experience or industry standards adjusted as appropriate to reflect our actual experience and future expectations. The assumptions vary by plan, year of issue, and policy duration and include a provision for adverse deviation.

Policy reserves for group single premium annuities are developed on a net single premium method. The reserves are calculated based on assumptions as to interest, mortality, and retirement that were appropriate at the date of issue. Mortality assumptions are based upon industry standards adjusted as appropriate to reflect our actual experience and future expectations. The assumptions vary by year of issue.

Policy reserves for interest sensitive products are principally policyholder account values resulting from customer deposits and interest credited less cost of insurance, policy administration expenses, surrender charges, and customer withdrawals.

Policy reserves require ongoing loss recognition testing. We perform loss recognition tests on our policy reserves annually, or more frequently if appropriate, using best estimate assumptions as of the date of the test, without a provision for adverse deviation. We group the policy reserves for each major product line within a segment when we perform the loss recognition tests. If the policy reserves determined using these best estimate assumptions are higher than our existing policy reserves net of any deferred acquisition cost balance, the existing policy reserves are increased or deferred acquisition costs are reduced to immediately recognize the deficiency. This becomes the new basis for policy reserves going forward, subject to future loss recognition testing.

Claim reserves represent future policy and contract benefits for claims that have been incurred or are estimated to have been incurred but not yet reported to us. Our claim reserves relate primarily to disability and long-term care policies and are calculated based on assumptions as to interest and claim resolution rates that are currently appropriate. Claim resolution rate assumptions are based on our actual experience. The interest rate assumptions used for discounting claim reserves are based on

projected portfolio yield rates, after consideration for defaults and investment expenses, for the assets supporting the liabilities for the various product lines. Unlike policy reserves for which assumptions are generally established and locked in at the time of policy issuance, claim reserves are subject to revision as current claim experience and projections of future factors affecting claim experience change. Claim reserves do not include a provision for adverse deviation. See Note 6.

Policyholders' Funds

Other Policyholders' Funds: Other policyholders' funds represent customer deposits plus interest credited at contract rates. We control interest rate risk by investing in quality assets which have an aggregate duration that closely matches the expected duration of life liabilities.

Income Tax

Income Tax: Deferred taxes reflect the net tax effects of temporary differences between the carrying amounts of assets and liabilities for financial statement purposes and the amounts used for income tax purposes. Deferred taxes have been measured using enacted statutory income tax rates and laws that are currently in effect. We record adjustments to our deferred taxes resulting from tax rate changes through income as of the date of enactment. We record deferred tax assets for tax positions taken in the U.S. and other tax jurisdictions based on our assessment of whether a position is more likely than not to be sustained upon examination based solely on its technical merits.  A valuation allowance is established for deferred tax assets when it is more likely than not that an amount will not be realized. We record tax expense related to Global Intangible Low-Taxed Income in the period in which it is incurred. We follow an aggregate portfolio approach to release disproportionate tax effects from accumulated other comprehensive income upon disposal of an entire business segment's portfolio. See Note 7.

Short-term and Long-term Debt

Short-term and Long-term Debt: Debt is generally carried at the unpaid principal balance, net of unamortized discount or premium and deferred debt issuance costs. Short-term debt consists of debt due within the next twelve months, including that portion of debt otherwise classified as long-term. The amortization of the original issue discount or premium as well as deferred debt issuance costs are recognized as a component of interest expense over the period the debt is expected to be outstanding. The carrying amount of long-term debt that is part of a fair value hedge program includes an adjustment to reflect the effect of the change in fair value attributable to the risk being hedged. Net interest settlements for fair value hedges on our long-term debt are recognized as a component of interest expense. See Note 8.

Right-of-Use Asset (ROU) and Lease Liability

Right-of-Use Asset (ROU) and Lease Liability: ROU assets represent our right to use an underlying asset for a specified lease term and are included in other assets in our consolidated balance sheet. Lease liabilities represent the present value of lease payments that we are obligated to pay arising from a lease and are included in other liabilities in our consolidated balance sheet.

We determine if an arrangement is a lease at inception through a formal process that evaluates our right to control the use of an identified asset for a period of time in exchange for consideration. We account for the lease and non-lease components of our building leases separately and have elected to use the available practical expedient to account for the lease and non-lease components of our equipment leases as a single component. All of our leases are classified as operating. For each operating lease, we calculate a lease liability at commencement date based on the present value of lease payments over the lease term and a corresponding ROU asset, adjusted for lease incentives. We do not recognize right-of-use assets and lease liabilities that arise from short-term leases for any class of underlying asset.

We consider the likelihood of renewal in determining the lease terms for the calculation of the ROU asset and lease liability. As most of our leases do not provide an implicit rate of interest, we use our incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. We use the implicit rate of interest when readily determinable.

Operating lease cost is calculated on a straight-line basis over the lease term and is included in other expenses in our consolidated statements of income. We amortize the ROU asset over the lease term on a pattern determined by the difference between the straight-line lease liability expense and the accretion of the imputed interest calculated on the lease liability. See Note 15.

Separation of Lease and Nonlease Components

We account for the lease and non-lease components of our building leases separately and have elected to use the available practical expedient to account for the lease and non-lease components of our equipment leases as a single component.

Short-term Leases

We do not recognize right-of-use assets and lease liabilities that arise from short-term leases for any class of underlying asset.

Treasury Stock and Retirement of Common Stock

Treasury Stock and Retirement of Common Stock: Treasury stock is reflected as a reduction of stockholders' equity at cost. When shares are retired, the par value is removed from common stock, and the excess of the repurchase price over par is allocated between additional paid-in capital and retained earnings. See Note 10.

Revenue Recognition

Revenue Recognition: Our non-interest sensitive life and accident and health products are long-duration contracts, and premium income is recognized as revenue when due from policyholders. If the contracts are experience rated, the estimated ultimate premium is recognized as revenue over the period of the contract. The estimated ultimate premium, which is revised to reflect current experience, is based on estimated claim costs, expenses, and profit margins.

For interest sensitive products, the amounts collected from policyholders are considered deposits, and only the deductions during the period for cost of insurance, policy administration, and surrenders are included in revenue. Policyholders' funds represent funds deposited by contract holders and are not included in revenue.

Revenue from Service Fees

Fees from our leave management services and administrative-services only (ASO) business are reported as other income when services are rendered.

Reinsurance

Reinsurance: We routinely enter into reinsurance agreements with other insurance companies to spread risk and thereby limit losses from large exposures. For each of our reinsurance agreements, we determine if the agreement provides indemnification against loss or liability relating to insurance risk in accordance with applicable accounting standards. If we determine that a reinsurance agreement does not expose the reinsurer to a reasonable possibility of a significant loss from insurance risk, we record the agreement using the deposit method of accounting.

Reinsurance activity is accounted for on a basis consistent with the terms of the reinsurance contracts and the accounting used for the original policies issued. Premium income and benefits and change in reserves for future benefits are presented in our consolidated statements of income net of reinsurance ceded. Ceded liabilities for policy and contract benefits, future policy and contract benefits, and unearned premiums are reported on a gross basis in our consolidated balance sheets, as are ceded policy loans. Our reinsurance recoverable includes the balances due from reinsurers under the terms of the reinsurance agreements for these ceded balances as well as settlement amounts currently due.

Where applicable, gains or costs recognized on reinsurance transactions are generally deferred and amortized into earnings based upon expected future premium income for non-interest sensitive insurance policies and estimated future gross profits for interest sensitive insurance policies. Gains or costs recognized on reinsurance transactions for non-interest sensitive products for which we no longer receive premiums are generally deferred and amortized into earnings based upon expected claim reserve patterns. The cost of reinsurance included in other assets in our consolidated balance sheets at December 31, 2022 and 2021 was $713.3 million and $777.1 million. The deferred gain on reinsurance included in other liabilities in our consolidated balance sheets at December 31, 2022 and 2021 was $3.1 million and $3.7 million, respectively.

Under ceded reinsurance agreements wherein we are not relieved of our legal liability to our policyholders, if the assuming reinsurer is unable to meet its obligations, we remain contingently liable. We evaluate the financial condition of reinsurers and monitor concentration of credit risk to minimize this exposure. We may also require assets in trust, letters of credit, or other acceptable collateral to support our reinsurance recoverable balances. We estimate an allowance for expected credit losses for our reinsurance recoverable balance using a probability of default approach which incorporates key inputs and assumptions regarding market factors, counterparty credit ratings, and collateral received. When calculating our allowance, we apply these market factors to the net amount of our credit exposure, which considers collateral arrangements such as letters of credit and trust accounts. We evaluate the factors used to determine our allowance on a quarterly basis to consider material changes in our assumptions and make adjustments accordingly. At December 31, 2022 and 2021, the allowance for expected credit losses on reinsurance recoverables was $1.7 million and $2.3 million, respectively. The allowance decreased $0.6 million and $9.4 million during the years ended December 31, 2022, and 2021, respectively. The decreases are primarily due to changes in the composition of the related receivable. See Note 12.

Premium Tax Expense

Premium Tax Expense: Premium tax expense is included in other expenses in the consolidated statements of income. For the years ended December 31, 2022, 2021, and 2020, premium tax expense was $169.3 million, $166.0 million, and $175.5 million, respectively.

Stock-Based Compensation

Stock-Based Compensation: The cost of stock-based compensation is generally measured based on the grant-date fair value of the award. The Black-Scholes options valuation model is used for estimating the fair value of stock options, and the Monte-Carlo valuation model is used for estimating the fair value of performance units. Restricted stock units and stock success units are valued based on the fair value of common stock at the grant date. Stock-based awards are expensed over the requisite service period, or for performance units over the requisite service period, or remaining service period, if and when it becomes probable that the performance conditions will be satisfied, with an offsetting increase to additional paid-in capital in stockholders' equity. Forfeitures of stock-based awards are recognized as they occur. See Note 11.

Earnings Per Share

Earnings Per Share: We compute basic earnings per share by dividing net income by the weighted average number of common shares outstanding for the period. Earnings per share assuming dilution is computed by dividing net income by the weighted average number of shares outstanding for the period plus the shares representing the dilutive effect of stock-based awards. In computing earnings per share assuming dilution, only potential common shares resulting from stock-based awards that are dilutive (those that reduce earnings per share) are included. We use the treasury stock method to account for the effect of outstanding stock options and nonvested stock awards on the computation of earnings per share assuming dilution. See Note 10.

Translation of Foreign Curency

Translation of Foreign Currency: Revenues and expenses of our foreign operations are translated at average exchange rates. Assets and liabilities are translated at the rate of exchange on the balance sheet dates. The translation gain or loss is generally reported in accumulated other comprehensive income, net of income tax. We do not provide for deferred taxes to the extent unremitted foreign earnings are deemed permanently invested.

Accounting for Participating Individual Life Insurance

Accounting for Participating Individual Life Insurance: Participating policies issued by one of our subsidiaries prior to its 1986 conversion from a mutual to a stock life insurance company will remain participating as long as the policies remain in-force. A Participation Fund Account (PFA) was established for the benefit of all such individual participating life and annuity policies and contracts. The assets of the PFA provide for the benefit, dividend, and certain expense obligations of the participating individual life insurance policies and annuity contracts. The assets of the PFA were $250.2 million and $297.7 million at December 31, 2022 and 2021, respectively.

Accounting Updates Outstanding

Accounting Updates Outstanding:

ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and related amendments

The amendments in this update provide optional guidance, for a limited period of time, to ease the potential burden in accounting for and recognizing the effects of reference rate reform on financial reporting. The guidance allows for various practical expedients and exceptions when applying GAAP to contracts, hedging relationships, and other transactions affected either by discontinued rates as a direct result of reference rate reform or a market-wide change in interest rates used for discounting, margining or contract price alignment, if certain criteria are met. Specifically, the guidance provides certain practical expedients for contract modifications, fair value hedges, and cash flow hedges, and also provides certain exceptions related to changes in the critical terms of a hedging relationship. The guidance also allows for a one-time election to sell or transfer debt securities that were both classified as held-to-maturity prior to January 1, 2020 and reference a rate affected by the reform.

The adoption of this update is permitted as of the beginning of the interim period that includes March 12, 2020 (the issuance date of the update), or any date thereafter, through December 31, 2024, at which point the guidance will sunset. We do not anticipate needing to adopt this guidance, but we will continue to monitor our contracts and hedging relationships throughout the adoption period.

ASU 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts and related amendments

This update significantly amends the accounting and disclosure requirements for long-duration insurance contracts. These changes include a requirement to review, and if necessary, update cash flow assumptions used to measure the liability for future policy benefits for traditional and limited-payment contracts at least annually, with changes recognized in earnings. In addition, an entity will be required to update the discount rate assumption at each reporting date using a yield that is reflective of an upper-medium grade fixed-income instrument, with changes recognized in other comprehensive income (loss) (OCI). These changes result in the elimination of the provision for risk of adverse deviation and premium deficiency (or loss recognition) testing. The update also requires that an entity measure all market risk benefits associated with deposit contracts at fair value, with changes recognized in earnings except for the portion attributable to a change in the instrument-specific credit risk, which is to be recognized in OCI. This update also simplifies the amortization of deferred acquisition costs by requiring amortization on a constant level basis over the expected term of the related contracts. Deferred acquisition costs are required to be written off for unexpected contract terminations but are no longer subject to an impairment test. Significant additional disclosures will also be required, which include disaggregated rollforwards of certain liability balances and the disclosure of qualitative and quantitative information about expected cash flows, estimates, and assumptions. The application of this guidance will vary based upon the specific requirements of the update but will generally result in either a modified retrospective or full retrospective approach with changes applied as of the beginning of the earliest period presented. Early adoption is permitted. The update is effective for periods beginning January 1, 2023.

We will adopt this update effective January 1, 2023 using the modified retrospective approach with changes applied as of the beginning of the earliest period presented or January 1, 2021, also referred to as the transition date. We are continuing to evaluate the effects of implementing this update. The most significant impact at the transition date will be the requirement to update the discount rate assumption to reflect an upper-medium grade fixed-income instrument, which will be generally equivalent to a single-A interest rate matched to the duration of our insurance liabilities and will result in a decrease to accumulated other comprehensive income (loss) (AOCI) within our total stockholders’ equity balance. After the transition date, we will be required to update the discount rate each subsequent reporting period with changes recorded in OCI and expect that this could have a material impact on OCI.

Our modified retrospective adoption of this update during the first quarter of 2023 will result in a decrease to AOCI as of the transition date, January 1, 2021, of approximately $6.7 billion. We expect a decrease to AOCI at December 31, 2021 in a range from approximately $5.4 billion to $5.6 billion. We expect a decrease to AOCI at December 31, 2022 in a range from approximately $0.6 billion to $0.8 billion.

The decrease in AOCI in our recast of 2021 and 2022 is driven primarily by the difference between the discount rate applied under current GAAP, which is based on an expected investment yield from our current investment strategy, and the single-A discount rate that will be required as a part of the update. The most significant impact relates to our longest duration products. Our investment strategy reflects the illiquid nature of the majority of our liability cash flows and, as a result, the yields in our investment portfolios supporting the cash outflows required for these products are generally higher than a single-A yield. In addition, the discount rates currently applied to reserves for our longest duration products, such as long-term care, include an assumption for long-term yields rising to more historical levels.

Our modified retrospective adoption is expected to result in an increase to net income during 2021 and 2022. We expect the increase in 2021 net income to be between approximately $145 million and $175 million, or between $0.70 and $0.85 per diluted per common share. We expect the increase in 2022 net income to be between approximately $80 million and $110 million, or $0.40 and $0.55 per diluted common share.

The net favorable impact of the recast of our net income for 2021 and 2022 shown above is due primarily to the following changes:

•Updating the lifetime cohort net premium ratios (lifetime loss ratio) for actual experience each reporting period will generally cause earnings patterns to be more consistent from period to period, with variances in experience reflected in earnings over the cohort lifetime. This will result in an unfavorable impact to income for 2021 and 2022.

•Alignment of amortization of deferred acquisition costs to a constant level basis and modification of amortization periods to reflect the expected term of the related contracts could result in either higher or lower income for the affected product lines. This will result in a net favorable impact to income for 2021 and 2022.

•Accelerated recognition of the provision for adverse deviation or other differences from current best estimate values for policies issued prior to the transition date and due to not establishing the provision for policies issued on or after the transition date will generally result in higher income most notably in the initial years after the transition date. This will result in a favorable impact to income for 2021 and 2022.

•Establishing reserves for claims incurred on or after the transition date at interest rates prescribed by the update could result in either higher or lower income for the affected product lines depending on the policy issue date and the interest rate environment at that time. This will result in an unfavorable impact to income for 2021 and a favorable impact to income for 2022.

•Updating cash flow assumptions could result in either higher or lower income. This will result in a favorable impact to income for 2021 and 2022.

•Applying non-contemporaneous reinsurance accounting to the second phase of our Closed Block individual disability reinsurance transaction which was completed in the first quarter of 2021. The primary impacts of this change are:

◦Reversing the increase in benefits and change in reserves for future benefits resulting from the realization of previously unrealized investment gains and losses previously recorded in AOCI that will be removed as of the transition date which will have a favorable impact on income for 2021.

◦Remeasuring the ceded reserves as a separate cohort of reserves at interest rates prescribed by the update and the resulting change to the cost of reinsurance. The differential in the discount rate applied to the direct and ceded cohorts of business will result in an unfavorable impact to income for 2021 and 2022 partially offset by a decrease in the amortization of the cost of reinsurance as a result of a lower cost of reinsurance.

We do not have products with market risk benefits. This update will also significantly expand our disclosures.

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Significant Accounting Policies (Tables)

12 Months Ended

Dec. 31, 2022

Accounting policies and error corrections [Abstract]

New Accounting Pronouncements and Changes in Accounting Principles

Accounting Updates Adopted in 2022:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2020-06, Debt—Debt with Conversion and Other Options (Subtopic 470-20) and Derivatives and Hedging—Contracts in Entity's Own Equity (Subtopic 815-40): Accounting for Convertible Instruments and Contracts in an Entity's Own Equity	The amendments in this update simplified the accounting for convertible instruments by removing certain separation models in the guidance related to convertible instruments and expanded related disclosure requirements. The amendments also revised the requirements for a contract or embedded derivative that is potentially settled in an entity's own stock to be classified as equity and also amended certain guidance related to the computations of earnings per share for convertible instruments and contracts in an entity's own stock. This guidance was applied in the period of adoption.	January 1, 2022	The adoption of this update did not have an effect on our financial position or results of operations, and did not expand our disclosures.

Accounting Updates Adopted in 2021:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2019-12, Income Taxes (Topic 740): Simplifying the Accounting for Income Taxes	The amendments in this update simplified the accounting for income taxes by removing certain exceptions in the guidance related to the following: 1. losses in continuing operations when there is income in other items, 2. foreign subsidiaries becoming equity method investments and vice versa, and 3. year-to-date interim period losses exceeding anticipated loss for the year. The amendments also simplified the accounting for income taxes related to the following: 1. franchise taxes partially based on income, 2. step up in the tax basis of goodwill, 3. allocation of tax expense to entities not subject to tax, 4. enacted changes in tax law or rates in interim periods, and 5. employee stock ownership programs and investments in qualified affordable housing projects accounted for using the equity method.	January 1, 2021	The adoption of this update did not have a material effect on our financial position or results of operations.

Accounting Updates Adopted in 2020:

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2017-04, Intangibles—Goodwill and Other (Topic 350): Simplifying the Test for Goodwill Impairment	This update eliminated the requirement to calculate the implied fair value of goodwill (the second step in the former two-step test) to measure a goodwill impairment charge. Instead, entities should perform the goodwill impairment test by comparing the fair value of a reporting unit with its carrying amount and recognize an impairment charge for the excess of the carrying amount over the fair value, with the loss not to exceed the total amount of goodwill allocated to that reporting unit. This guidance was applied in the period of adoption.	January 1, 2020	The adoption of this update did not have an effect on our financial position or results of operations.
ASU 2018-13, Fair Value Measurement (Topic 820): Disclosure Framework—Changes to the Disclosure Requirements for Fair Value Measurement	This update amended the fair value measurement guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removed certain disclosures related to Level 1 and Level 2 transfers and removed the discussion regarding valuation processes of Level 3 fair value measurements. The update modified guidance related to investments in certain entities that calculate net asset value to explicitly require disclosure regarding timing of liquidation of the investee's assets and timing of redemption restrictions. The update added disclosures around the changes in unrealized gains and losses in other comprehensive income for recurring Level 3 investments held at the end of the reporting period and adds disclosures regarding certain unobservable inputs on Level 3 fair value measurements. The guidance was applied both retrospectively and prospectively, depending on the specific requirement of the update.	December 31, 2018 for the removal and modification of certain disclosures and January 1, 2020 for the addition of certain disclosures.	The adoption of this update modified our disclosures but did not have an impact on our financial position or results of operations.

Standard	Description	Date of Adoption	Effect on Financial Statements
ASU 2018-14, Compensation—Retirement Benefits—Defined Benefit Plans—General (Subtopic 715-20): Disclosure Framework—Changes to the Disclosure Requirements for Defined Benefit Plans	This update amends the defined benefit pension and other postretirement benefit guidance by removing or clarifying certain existing disclosure requirements, while also adding new disclosure requirements. Specifically, this update removes the requirement to disclose the effects of a one-percentage point change in the assumed healthcare cost trend and the requirement to disclose amounts in accumulated other comprehensive income expected to be recognized as part of net periodic benefit cost of the next year. This update adds a requirement to describe the reasons for significant gains and losses related to changes in the benefit obligation for the period. The update also clarifies that the projected benefit obligation (PBO) and accumulated benefit obligation (ABO) and fair value of plan assets are to be disclosed for plans with PBOs or ABOs in excess of plan assets. The guidance was applied retrospectively.	December 31, 2020	The adoption of this update modified our disclosures but did not have an impact on our financial position or results of operations.
ASU 2018-19, Codification Improvements to Topic 326, Financial Instruments—Credit Losses	This update amended the guidance on the impairment of financial instruments. The update added an impairment model known as the current expected credit loss model that is based on expected losses rather than incurred losses and will generally result in earlier recognition of allowances for losses. The current expected credit loss model applies to financial instruments such as mortgage loans, fixed maturity securities classified as held-to-maturity, and certain receivables. The update also modified the other-than-temporary impairment model used for available-for-sale fixed maturity securities such that credit losses are recognized as an allowance rather than as a reduction in the amortized cost of the security. The reversal of previously recognized credit losses on available-for-sale fixed maturity securities is allowed under specified circumstances. Additional disclosures are also required, including information used to develop the allowance for losses. The guidance was applied using a modified retrospective approach through a cumulative-effect adjustment to retained earnings as of the beginning of the period of adoption. For available-for-sale fixed maturity securities, the update was applied prospectively. Other-than-temporary impairment losses recognized on available-for-sale fixed maturity securities prior to adoption of the update cannot be reversed. This guidance was applied in the period of adoption.	January 1, 2020	The adoption of this update resulted in a cumulative-effect reduction to retained earnings of $18.9 million with a corresponding decrease to mortgage loans of $8.3 million, a decrease to accounts and premiums receivable of $13.5 million and a decrease to deferred income tax of $5.0 million. There were also immaterial impacts to reinsurance recoverable and other liabilities.

Accounting Updates Outstanding:

ASU 2020-04, Reference Rate Reform (Topic 848): Facilitation of the Effects of Reference Rate Reform on Financial Reporting and related amendments

The amendments in this update provide optional guidance, for a limited period of time, to ease the potential burden in accounting for and recognizing the effects of reference rate reform on financial reporting. The guidance allows for various practical expedients and exceptions when applying GAAP to contracts, hedging relationships, and other transactions affected either by discontinued rates as a direct result of reference rate reform or a market-wide change in interest rates used for discounting, margining or contract price alignment, if certain criteria are met. Specifically, the guidance provides certain practical expedients for contract modifications, fair value hedges, and cash flow hedges, and also provides certain exceptions related to changes in the critical terms of a hedging relationship. The guidance also allows for a one-time election to sell or transfer debt securities that were both classified as held-to-maturity prior to January 1, 2020 and reference a rate affected by the reform.

The adoption of this update is permitted as of the beginning of the interim period that includes March 12, 2020 (the issuance date of the update), or any date thereafter, through December 31, 2024, at which point the guidance will sunset. We do not anticipate needing to adopt this guidance, but we will continue to monitor our contracts and hedging relationships throughout the adoption period.

ASU 2018-12, Financial Services—Insurance (Topic 944): Targeted Improvements to the Accounting for Long-Duration Contracts and related amendments

This update significantly amends the accounting and disclosure requirements for long-duration insurance contracts. These changes include a requirement to review, and if necessary, update cash flow assumptions used to measure the liability for future policy benefits for traditional and limited-payment contracts at least annually, with changes recognized in earnings. In addition, an entity will be required to update the discount rate assumption at each reporting date using a yield that is reflective of an upper-medium grade fixed-income instrument, with changes recognized in other comprehensive income (loss) (OCI). These changes result in the elimination of the provision for risk of adverse deviation and premium deficiency (or loss recognition) testing. The update also requires that an entity measure all market risk benefits associated with deposit contracts at fair value, with changes recognized in earnings except for the portion attributable to a change in the instrument-specific credit risk, which is to be recognized in OCI. This update also simplifies the amortization of deferred acquisition costs by requiring amortization on a constant level basis over the expected term of the related contracts. Deferred acquisition costs are required to be written off for unexpected contract terminations but are no longer subject to an impairment test. Significant additional disclosures will also be required, which include disaggregated rollforwards of certain liability balances and the disclosure of qualitative and quantitative information about expected cash flows, estimates, and assumptions. The application of this guidance will vary based upon the specific requirements of the update but will generally result in either a modified retrospective or full retrospective approach with changes applied as of the beginning of the earliest period presented. Early adoption is permitted. The update is effective for periods beginning January 1, 2023.

We will adopt this update effective January 1, 2023 using the modified retrospective approach with changes applied as of the beginning of the earliest period presented or January 1, 2021, also referred to as the transition date. We are continuing to evaluate the effects of implementing this update. The most significant impact at the transition date will be the requirement to update the discount rate assumption to reflect an upper-medium grade fixed-income instrument, which will be generally equivalent to a single-A interest rate matched to the duration of our insurance liabilities and will result in a decrease to accumulated other comprehensive income (loss) (AOCI) within our total stockholders’ equity balance. After the transition date, we will be required to update the discount rate each subsequent reporting period with changes recorded in OCI and expect that this could have a material impact on OCI.

Our modified retrospective adoption of this update during the first quarter of 2023 will result in a decrease to AOCI as of the transition date, January 1, 2021, of approximately $6.7 billion. We expect a decrease to AOCI at December 31, 2021 in a range from approximately $5.4 billion to $5.6 billion. We expect a decrease to AOCI at December 31, 2022 in a range from approximately $0.6 billion to $0.8 billion.

The decrease in AOCI in our recast of 2021 and 2022 is driven primarily by the difference between the discount rate applied under current GAAP, which is based on an expected investment yield from our current investment strategy, and the single-A discount rate that will be required as a part of the update. The most significant impact relates to our longest duration products. Our investment strategy reflects the illiquid nature of the majority of our liability cash flows and, as a result, the yields in our investment portfolios supporting the cash outflows required for these products are generally higher than a single-A yield. In addition, the discount rates currently applied to reserves for our longest duration products, such as long-term care, include an assumption for long-term yields rising to more historical levels.

Our modified retrospective adoption is expected to result in an increase to net income during 2021 and 2022. We expect the increase in 2021 net income to be between approximately $145 million and $175 million, or between $0.70 and $0.85 per diluted per common share. We expect the increase in 2022 net income to be between approximately $80 million and $110 million, or $0.40 and $0.55 per diluted common share.

The net favorable impact of the recast of our net income for 2021 and 2022 shown above is due primarily to the following changes:

•Updating the lifetime cohort net premium ratios (lifetime loss ratio) for actual experience each reporting period will generally cause earnings patterns to be more consistent from period to period, with variances in experience reflected in earnings over the cohort lifetime. This will result in an unfavorable impact to income for 2021 and 2022.

•Alignment of amortization of deferred acquisition costs to a constant level basis and modification of amortization periods to reflect the expected term of the related contracts could result in either higher or lower income for the affected product lines. This will result in a net favorable impact to income for 2021 and 2022.

•Accelerated recognition of the provision for adverse deviation or other differences from current best estimate values for policies issued prior to the transition date and due to not establishing the provision for policies issued on or after the transition date will generally result in higher income most notably in the initial years after the transition date. This will result in a favorable impact to income for 2021 and 2022.

•Establishing reserves for claims incurred on or after the transition date at interest rates prescribed by the update could result in either higher or lower income for the affected product lines depending on the policy issue date and the interest rate environment at that time. This will result in an unfavorable impact to income for 2021 and a favorable impact to income for 2022.

•Updating cash flow assumptions could result in either higher or lower income. This will result in a favorable impact to income for 2021 and 2022.

•Applying non-contemporaneous reinsurance accounting to the second phase of our Closed Block individual disability reinsurance transaction which was completed in the first quarter of 2021. The primary impacts of this change are:

◦Reversing the increase in benefits and change in reserves for future benefits resulting from the realization of previously unrealized investment gains and losses previously recorded in AOCI that will be removed as of the transition date which will have a favorable impact on income for 2021.

◦Remeasuring the ceded reserves as a separate cohort of reserves at interest rates prescribed by the update and the resulting change to the cost of reinsurance. The differential in the discount rate applied to the direct and ceded cohorts of business will result in an unfavorable impact to income for 2021 and 2022 partially offset by a decrease in the amortization of the cost of reinsurance as a result of a lower cost of reinsurance.

We do not have products with market risk benefits. This update will also significantly expand our disclosures.

ASU 2022-02, Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures

The amendments in this update eliminate the troubled debt restructuring recognition and measurement guidance and instead require that an entity evaluate whether the modification represents a new loan or the continuation of an existing loan. The amendments also enhance the disclosure requirements related to certain modifications of receivables made to borrowers experiencing financial difficulty. In addition, the amendments in this update require that an entity disclose current-period gross write-offs by year of origination for financing receivables and net investment in leases. The amendments in this update should be applied prospectively, except for the transition method related to the recognition and measurement of troubled debt restructurings, for which an entity has the option to apply a modified retrospective transition method, resulting in a cumulative-effect adjustment to retained earnings in the period of adoption.

This update is effective for periods beginning January 1, 2023, and we do not anticipate that the adoption of this update will have an effect on our financial position or results of operations but will expand our disclosures.

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Fair Values of Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2022

Fair Value Disclosures [Abstract]

Fair Value, Investments, Entities that Calculate Net Asset Value Per Share

The following tables present additional information about our private equity partnerships, including commitments for additional investments which may or may not be funded:

		December 31, 2022
Investment Category		Fair Value		Redemption Term / Redemption Notice	Unfunded Commitments
		(in millions of dollars)			(in millions of dollars)
Private Credit	(a)	$	239.3	Not redeemable	$	90.9
		35.7		Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice	13.4
Total Private Credit		275.0			104.3
Private Equity	(b)	453.6		Not redeemable	377.2
		31.7		Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice	39.1
Total Private Equity		485.3			416.3
Real Assets	(c)	373.9		Not redeemable	256.3
		60.1		Quarterly / 90 days notice	—
Total Real Assets		434.0			256.3
Total Partnerships		$	1,194.3		$	776.9

		December 31, 2021
Investment Category		Fair Value		Redemption Term / Redemption Notice	Unfunded Commitments
		(in millions of dollars)			(in millions of dollars)
Private Credit	(a)	$	240.6	Not redeemable	$	143.7
		38.8		Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice	6.8
Total Private Credit		279.4			150.5
Private Equity	(b)	365.8		Not redeemable	274.3
		18.8		Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice	50.3
Total Private Equity		384.6			324.6
Real Assets	(c)	256.2		Not redeemable	278.1
		58.4		Quarterly / 90 days notice	—
Total Real Assets		314.6			278.1
Total Partnerships		$	978.6		$	753.2

(a)Private Credit - The limited partnerships described in this category employ various investment strategies, generally providing direct lending or other forms of debt financing including first-lien, second-lien, mezzanine, and subordinated loans. The limited partnerships have credit exposure to corporates, physical assets, and/or financial assets within a variety of industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail) in North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 55 percent in the next 3 years, 34 percent during the period from 3 to 5 years, 9 percent during the period from 5 to 10 years, and 2 percent during the period from 10 to 15 years.

(b)Private Equity - The limited partnerships described in this category employ various strategies generally investing in controlling or minority control equity positions directly in companies and/or assets across various industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail), primarily in private markets within North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 35 percent in the next 3 years, 19 percent during the period from 3 to 5 years, 40 percent during the period from 5 to 10 years, and 6 percent during the period from 10 to 15 years.

(c)Real Assets - The limited partnerships described in this category employ various strategies, which include investing in the equity and/or debt financing of physical assets, including infrastructure (energy, power, water/wastewater, communications), transportation (including airports, ports, toll roads, aircraft, railcars) and real estate in North America, Europe, South America, and Asia.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 22 percent in the next 3 years, 28 percent during period from 3 to 5 years and 50 percent during the period from 5 to 10 years.

Fair Values by Fair Value Hierarchy Input Level

The following tables present information about financial instruments measured at fair value on a recurring basis by fair value level, based on the observability of the inputs used.

	December 31, 2022
	Level 1		Level 2		Level 3		NAV		Total
	(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities	$	81.7	$	416.5	$	—	$	—	$	498.2
States, Municipalities, and Political Subdivisions	8.7		3,448.3		0.2		—		3,457.2
Foreign Governments	—		827.1		—		—		827.1
Public Utilities	160.1		4,796.8		—		—		4,956.9
Mortgage/Asset-Backed Securities	—		551.3		22.0		—		573.3
All Other Corporate Bonds	4,268.6		20,097.3		158.7		—		24,524.6
Redeemable Preferred Stocks	—		3.5		—		—		3.5
Total Fixed Maturity Securities	4,519.1		30,140.8		180.9		—		34,840.8
Other Long-term Investments
Derivatives
Forwards	—		5.6		—		—		5.6
Foreign Exchange Contracts	—		83.5		—		—		83.5
Total Derivatives	—		89.1		—		—		89.1
Perpetual Preferred and Equity Securities	—		9.6		16.2		—		25.8
Private Equity Partnerships	—		—		—		1,194.3		1,194.3
Total Other Long-term Investments	—		98.7		16.2		1,194.3		1,309.2
Total Financial Instrument Assets Carried at Fair Value	$	4,519.1	$	30,239.5	$	197.1	$	1,194.3	$	36,150.0
Liabilities
Other Liabilities
Derivatives
Forwards	$	—	$	48.5	$	—	$	—	$	48.5
Foreign Exchange Contracts	—		25.5		—		—		25.5
Embedded Derivative in Modified Coinsurance Arrangement	—		—		13.9		—		13.9
Total Derivatives	—		74.0		13.9		—		87.9
Total Financial Instrument Liabilities Carried at Fair Value	$	—	$	74.0	$	13.9	$	—	$	87.9

	December 31, 2021
	Level 1		Level 2		Level 3		NAV		Total
	(in millions of dollars)
Assets
Fixed Maturity Securities
United States Government and Government Agencies and Authorities	$	—	$	580.1	$	—	$	—	$	580.1
States, Municipalities, and Political Subdivisions	—		4,714.1		13.4		—		4,727.5
Foreign Governments	—		1,125.8		20.8		—		1,146.6
Public Utilities	230.8		6,140.7		44.5		—		6,416.0
Mortgage/Asset-Backed Securities	—		451.1		187.2		—		638.3
All Other Corporate Bonds	3,288.7		25,673.2		861.5		—		29,823.4
Redeemable Preferred Stocks	—		4.1		—		—		4.1
Total Fixed Maturity Securities	3,519.5		38,689.1		1,127.4		—		43,336.0
Other Long-term Investments
Derivatives
Foreign Exchange Contracts	—		39.5		—		—		39.5
Total Derivatives	—		39.5		—		—		39.5
Perpetual Preferred and Equity Securities	—		27.9		5.8		—		33.7
Private Equity Partnerships	—		—		—		978.6		978.6
Total Other Long-term Investments	—		67.4		5.8		978.6		1,051.8
Total Financial Instrument Assets Carried at Fair Value	$	3,519.5	$	38,756.5	$	1,133.2	$	978.6	$	44,387.8
Liabilities
Other Liabilities
Derivatives
Foreign Exchange Contracts	$	—	$	35.0	$	—	$	—	$	35.0
Embedded Derivative in Modified Coinsurance Arrangement	—		—		30.1		—		30.1
Total Derivatives	—		35.0		30.1		—		65.1
Total Financial Instrument Liabilities Carried at Fair Value	$	—	$	35.0	$	30.1	$	—	$	65.1

Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs

Changes in assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) are as follows:

	Year Ended December 31, 2022
	Fair Value Beginning of Year		Total Realized and Unrealized Investment Gains (Losses)  Included in				Purchases		Sales/Maturities		Level 3 Transfers				Fair Value End of Year		Change in Unrealized Gain (Loss) on Securities Held at the End of Period included in
			Earnings		OCI						Into		Out of				OCI		Earnings
	(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions	$	13.4	$	—	$	(0.1)	$	—	$	—	$	0.3	$	(13.4)	$	0.2	$	(0.1)	$	—
Foreign Governments	20.8		—		(0.8)		—		(20.0)		—		—		—		(0.8)		—
Public Utilities	44.5		—		(2.8)		—		(12.8)		15.6		(44.5)		—		(2.8)		—
Mortgage/Asset-Backed Securities	187.2		—		(0.3)		20.7		(10.6)		—		(175.0)		22.0		(0.3)		—
All Other Corporate Bonds	861.5		—		(32.0)		25.3		(102.3)		161.9		(755.7)		158.7		(32.0)		—
Total Fixed Maturity Securities	1,127.4		—		(36.0)		46.0		(145.7)		177.8		(988.6)		180.9		(36.0)		—
Perpetual Preferred and Equity Securities	5.8		3.0		—		7.1		—		0.3		—		16.2		—		3.0
Embedded Derivative in Modified Coinsurance Arrangement	(30.1)		16.2		—		—		—		—		—		(13.9)		—		16.2

	Year Ended December 31, 2021
	Fair Value Beginning of Year		Total Realized and Unrealized Investment Gains (Losses)  Included in				Purchases		Sales/Maturities		Level 3 Transfers				Fair Value End of Year		Change in Unrealized Gain (Loss) on Securities Held at the End of Period included in
			Earnings		OCI						Into		Out of				OCI		Earnings
	(in millions of dollars)
Fixed Maturity Securities
States, Municipalities, and Political Subdivisions	$	15.5	$	—	$	(2.1)	$	—	$	—	$	—	$	—	$	13.4	$	(2.1)	$	—
Foreign Governments	21.8		—		(1.0)		—		—		—		—		20.8		(1.0)		—
Public Utilities	185.7		—		(2.3)		—		(44.0)		36.0		(130.9)		44.5		(2.3)		—
Mortgage/Asset-Backed Securities	81.3		—		(96.0)		—		(72.3)		274.2		—		187.2		(96.0)		—
All Other Corporate Bonds	943.1		—		(24.6)		249.9		(80.2)		77.6		(304.3)		861.5		(24.6)		—
Total Fixed Maturity Securities	1,247.4		—		(126.0)		249.9		(196.5)		387.8		(435.2)		1,127.4		(126.0)		—
Perpetual Preferred and Equity Securities	4.7		0.1		—		1.0		—		—		—		5.8		—		0.1
Embedded Derivative in Modified Coinsurance Arrangement	(39.8)		9.7		—		—		—		—		—		(30.1)		—		9.7

Realized and unrealized investment gains and losses presented in the preceding tables represent gains and losses only for the time during which the applicable financial instruments were classified as Level 3. The transfers between levels resulted primarily from a change in observability of three inputs used to determine fair values of the securities transferred: (1) transactional data for new issuance and secondary trades, (2) broker/dealer quotes and pricing, primarily related to changes in the level of activity in the market and whether the market was considered orderly, and (3) comparable bond metrics from which to perform an analysis. For fair value measurements of financial instruments that were transferred either into or out of Level 3, we reflect the transfers using the fair value at the beginning of the period. We believe this allows for greater transparency, as all changes in fair value that arise during the reporting period of the transfer are disclosed as a component of our Level 3 reconciliation.

Quantitative Information Regarding Significant Unobservable Inputs

The table below provides quantitative information regarding the significant unobservable inputs used in Level 3 fair value measurements derived from internal models. Unobservable inputs for fixed maturity securities are weighted by the fair value of the securities. Certain securities classified as Level 3 are excluded from the table below due to limitations in our ability to obtain the underlying inputs used by external pricing sources.

	December 31, 2022
	Fair Value		Valuation Method	Unobservable Input		Range/Weighted Average
	(in millions of dollars)
Fixed Maturity Securities
All Other Corporate Bonds - Private	$	15.3	Market Approach	Volatility of Credit Market Convention	(a) (b)	5.41% - 5.41% / 5.41% Priced at Par Value
Perpetual Preferred and Equity Securities	16.2		Market Approach	Market Convention	(b)	Priced at Cost, Owner's Equity, or Most Recent Round
Embedded Derivative in Modified Coinsurance Arrangement	(13.9)		Discounted Cash Flows	Projected Liability Cash Flows Weighted Spread of Swap Curve	(d)	Actuarial Assumptions 0.6%

	December 31, 2021
	Fair Value		Valuation Method	Unobservable Input		Range/Weighted Average
	(in millions of dollars)
Fixed Maturity Securities
All Other Corporate Bonds - Private	$	111.8	Market Approach	Volatility of Credit Lack of Marketability	(a) (c)	6.30% - 6.30% / 6.30% 0.14% - 0.73% / 0.51%
Perpetual Preferred and Equity Securities	5.8		Market Approach	Market Convention	(b)	Priced at Cost or Owner's Equity
Embedded Derivative in Modified Coinsurance Arrangement	(30.1)		Discounted Cash Flows	Projected Liability Cash Flows Weighted Spread of Swap Curve	(d)	Actuarial Assumptions 0.7%

(a)Represents basis point adjustments for credit-specific factors

(b)Represents a decision to price based on par value, cost, owner's equity, or the price of the most recent capital funding round when limited data is available

(c)Represents basis point adjustments to apply a discount due to the illiquidity of an investment

(d)Represents various actuarial assumptions required to derive the liability cash flows. Fair value of embedded derivative is most often driven by the change in the weighted average credit spread to the swap curve for the assets backing the hypothetical loan

Carrying Amount and Fair Value of Financial Instruments

The following table presents the carrying amounts and estimated fair values of our financial instruments not measured at fair value and indicates the level in the fair value hierarchy of the estimated fair value measurement based on the observability of the inputs used:

	December 31, 2022
	Estimated Fair Value
	Level 1		Level 2		Level 3		Total		Carrying Value
	(in millions of dollars)
Assets
Mortgage Loans	$	—	$	2,159.5	$	—	$	2,159.5	$	2,435.4
Policy Loans	—		—		3,677.0		3,677.0		3,601.2
Other Long-term Investments
Miscellaneous Long-term Investments	—		17.1		1.3		18.4		18.4
Total Financial Instrument Assets Not Carried at Fair Value	$	—	$	2,176.6	$	3,678.3	$	5,854.9	$	6,055.0
Liabilities
Long-term Debt	$	2,288.9	$	783.1	$	—	$	3,072.0	$	3,427.8
Other Liabilities
Unfunded Commitments	—		0.7		—		0.7		0.7
Payable for Collateral on FHLB Funding Agreements	—		99.1		—		99.1		99.1
Total Financial Instrument Liabilities Not Carried at Fair Value	$	2,288.9	$	882.9	$	—	$	3,171.8	$	3,527.6

	December 31, 2021
	Estimated Fair Value
	Level 1		Level 2		Level 3		Total		Carrying Value
	(in millions of dollars)
Assets
Mortgage Loans	$	—	$	2,677.8	$	—	$	2,677.8	$	2,560.4
Policy Loans	—		—		3,807.1		3,807.1		3,662.9
Other Long-term Investments
Miscellaneous Long-term Investments	—		22.1		9.5		31.6		31.6
Total Financial Instrument Assets Not Carried at Fair Value	$	—	$	2,699.9	$	3,816.6	$	6,516.5	$	6,254.9
Liabilities
Long-term Debt	$	2,237.3	$	1,641.8	$	—	$	3,879.1	$	3,442.2
Other Liabilities
Unfunded Commitments	—		0.7		—		0.7		0.7
Payable for Collateral on FHLB Funding Agreements	—		160.9		—		160.9		160.9
Total Financial Instrument Liabilities Not Carried at Fair Value	$	2,237.3	$	1,803.4	$	—	$	4,040.7	$	3,603.8

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Investments (Tables)

12 Months Ended

Dec. 31, 2022

Investments, Debt and Equity Securities [Abstract]

Amortized Cost and Fair Values of Securities by Security Type

At December 31, 2022 and 2021, all fixed maturity securities were classified as available-for-sale. The amortized cost and fair values of securities by security type are shown as follows:

	December 31, 2022
	Amortized Cost, Gross of ACL(1)		ACL(1)		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	503.8	$	—	$	20.3	$	25.9	$	498.2
States, Municipalities, and Political Subdivisions	4,006.0		—		87.1		635.9		3,457.2
Foreign Governments	908.1		—		34.9		115.9		827.1
Public Utilities	5,170.9		—		141.0		355.0		4,956.9
Mortgage/Asset-Backed Securities	592.1		—		8.2		27.0		573.3
All Other Corporate Bonds	26,640.3		—		452.1		2,567.8		24,524.6
Redeemable Preferred Stocks	4.0		—		—		0.5		3.5
Total Fixed Maturity Securities	$	37,825.2	$	—	$	743.6	$	3,728.0	$	34,840.8

	December 31, 2021
	Amortized Cost, Gross of ACL(1)		ACL(1)		Gross Unrealized Gain		Gross Unrealized Loss		Fair Value
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	460.1	$	—	$	120.1	$	0.1	$	580.1
States, Municipalities, and Political Subdivisions	4,150.2		—		584.2		6.9		4,727.5
Foreign Governments	952.0		—		215.3		20.7		1,146.6
Public Utilities	5,266.4		—		1,159.4		9.8		6,416.0
Mortgage/Asset-Backed Securities	587.9		—		50.4		—		638.3
All Other Corporate Bonds	25,966.1		—		3,919.9		62.6		29,823.4
Redeemable Preferred Stocks	4.0		—		0.1		—		4.1
Total Fixed Maturity Securities	$	37,386.7	$	—	$	6,049.4	$	100.1	$	43,336.0

(1)Allowance for Credit Losses

Distribution of the Maturity Dates for Fixed Maturity Securities

The following is a distribution of the maturity dates for fixed maturity securities. The maturity dates have not been adjusted for possible calls or prepayments.

	December 31, 2022
	Amortized Cost, Net of ACL(1)		Unrealized Gain Position				Unrealized Loss Position
			Gross Gain		Fair Value		Gross Loss		Fair Value
	(in millions of dollars)
1 year or less	$	1,133.5	$	2.9	$	339.1	$	5.7	$	791.6
Over 1 year through 5 years	7,090.8		86.7		1,953.2		238.4		4,985.9
Over 5 years through 10 years	10,096.7		294.8		3,538.9		863.8		5,988.8
Over 10 years	18,912.1		351.0		5,013.2		2,593.1		11,656.8
	37,233.1		735.4		10,844.4		3,701.0		23,423.1
Mortgage/Asset-Backed Securities	592.1		8.2		186.6		27.0		386.7
Total Fixed Maturity Securities	$	37,825.2	$	743.6	$	11,031.0	$	3,728.0	$	23,809.8

	December 31, 2021
	Amortized Cost, Net of ACL(1)		Unrealized Gain Position				Unrealized Loss Position
			Gross Gain		Fair Value		Gross Loss		Fair Value
	(in millions of dollars)
1 year or less	$	767.3	$	17.6	$	756.0	$	0.1	$	28.9
Over 1 year through 5 years	6,613.2		540.2		7,050.5		6.0		96.9
Over 5 years through 10 years	10,614.3		1,453.3		10,905.0		26.0		1,136.6
Over 10 years	18,804.0		3,987.9		20,778.4		68.0		1,945.4
	36,798.8		5,999.0		39,489.9		100.1		3,207.8
Mortgage/Asset-Backed Securities	587.9		50.4		609.0		—		29.3
Total Fixed Maturity Securities	$	37,386.7	$	6,049.4	$	40,098.9	$	100.1	$	3,237.1

Distribution by External Credit Rating for Fixed Maturity Securities

The following chart depicts an analysis of our fixed maturity security portfolio between investment-grade and below-investment-grade categories as of December 31, 2022:

					Gross Unrealized Loss
	Fair Value		Gross Unrealized Gain		Amount		Percent of Total Gross Unrealized Loss
	(in millions of dollars)
Investment-Grade	$	32,851.0	$	734.6	$	3,545.5	95.1	%
Below-Investment-Grade	1,989.8		9.0		182.5		4.9
Total Fixed Maturity Securities	$	34,840.8	$	743.6	$	3,728.0	100.0	%

Debt Securities, Available-for-sale, Allowance for Credit Loss

The following tables present a rollforward of the allowance for credit losses on available-for-sale fixed maturity securities, which were classified as "public utilities" during year ended December 31, 2022 and "all other corporate bonds" during the year ended December 31, 2021, respectively.

	Year Ended December 31
	2022		2021
	(in millions of dollars)
Balance, beginning of period	$	—	$	6.8
Credit losses on securities for which credit losses were not previously recorded	4.6		—
Change in allowance on securities with allowance recorded in previous period	—		0.5
Change in allowance on securities disposed during the period	(4.6)		(7.3)
Balance, end of period	$	—	$	—

Low Income Housing Tax Credits

The Company invests in tax credit partnerships primarily for the receipt of income tax credits and tax benefits derived from passive losses on the investments. Amounts recognized in the consolidated statements of income are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Income Tax Credits	$	8.0	$	21.6	$	33.2
Amortization, Net of Tax	(5.9)		(15.0)		(21.9)
Income Tax Benefit	$	2.1	$	6.6	$	11.3

Mortgage Loans by Property Type and Geographic Region

The carrying amount of mortgage loans by property type and geographic region are presented below.

	December 31
	2022				2021
	(in millions of dollars)
	Carrying		Percent of		Carrying		Percent of
	Amount		Total		Amount		Total
Property Type
Apartment	$	688.6	28.3	%	$	780.0	30.5	%
Industrial	745.3		30.6		734.4		28.7
Office	423.0		17.4		467.2		18.2
Retail	534.5		21.9		533.3		20.8
Other	44.0		1.8		45.5		1.8
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

Region
New England	$	52.4	2.2	%	$	54.9	2.1	%
Mid-Atlantic	192.4		7.9		214.7		8.4
East North Central	313.0		12.9		298.4		11.7
West North Central	181.4		7.4		193.1		7.5
South Atlantic	539.3		22.1		582.1		22.7
East South Central	101.8		4.2		120.7		4.7
West South Central	212.6		8.7		243.2		9.6
Mountain	298.7		12.3		290.6		11.3
Pacific	543.8		22.3		562.7		22.0
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value

The following tables present information about mortgage loans by the applicable credit quality indicators:

	December 31
	2022				2021
	(in millions of dollars)
	Carrying Amount		Percent of Total		Carrying Amount		Percent of Total
Internal Rating
AA	$	92.3	3.8	%	$	27.3	1.1	%
A	843.9		34.6		709.6		27.7
BBB	1,458.0		59.9		1,802.6		70.4
BB	41.2		1.7		20.9		0.8
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

Loan-to-Value Ratio(1)
<= 65%	$	1,389.6	57.0	%	$	1,346.1	52.6	%
> 65% <= 75%	937.2		38.5		1,076.8		42.0
> 75% <= 85%	75.0		3.1		114.9		4.5
> 85%	33.6		1.4		22.6		0.9
Total	$	2,435.4	100.0	%	$	2,560.4	100.0	%

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

Mortgage Loans by Credit Quality Indicators

The following table presents the amortized cost of our mortgage loans by year of origination and credit quality indicators for the years ended December 31, 2022 and 2021:

	Year Ended December 31, 2022
	Prior to 2018		2018		2019		2020		2021		2022		Total
	(in millions of dollars)
Internal Rating
AA	$	53.8	$	27.5	$	11.1	$	—	$	—	$	—	$	92.4
A	485.0		123.3		96.8		35.9		80.6		24.0		845.6
BBB	534.0		219.8		236.9		134.0		275.8		64.6		1,465.1
BB	35.7		5.9		—		—		—		—		41.6
Total Amortized Cost	1,108.5		376.5		344.8		169.9		356.4		88.6		2,444.7
Allowance for credit losses	(4.3)		(1.8)		(1.3)		(0.6)		(0.8)		(0.5)		(9.3)
Carrying Amount	$	1,104.2	$	374.7	$	343.5	$	169.3	$	355.6	$	88.1	$	2,435.4
Loan-to-Value Ratio(1)
<=65%	$	782.6	$	189.0	$	193.9	$	81.3	$	128.9	$	16.9	$	1,392.6
>65<=75%	230.2		181.6		150.9		80.1		227.5		71.7		942.0
>75%<=85%	67.5		—		—		8.5		—		—		76.0
>85%	28.2		5.9		—		—		—		—		34.1
Total Amortized Cost	1,108.5		376.5		344.8		169.9		356.4		88.6		2,444.7
Allowance for credit losses	(4.3)		(1.8)		(1.3)		(0.6)		(0.8)		(0.5)		(9.3)
Carrying Amount	$	1,104.2	$	374.7	$	343.5	$	169.3	$	355.6	$	88.1	$	2,435.4

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

	Year Ended December 31, 2021
	Prior to 2017		2017		2018		2019		2020		2021		Total
	(in millions of dollars)
Internal Rating
AA	$	3.3	$	—	$	24.0	$	—	$	—	$	—	$	27.3
A	414.6		68.0		71.1		28.9		17.6		110.6		710.8
BBB	561.2		227.3		283.3		331.9		163.1		242.6		1,809.4
BB	5.0		10.2		6.0		—		—		—		21.2
Total Amortized Cost	984.1		305.5		384.4		360.8		180.7		353.2		2,568.7
Allowance for credit losses	(2.6)		(1.4)		(1.4)		(1.4)		(0.7)		(0.8)		(8.3)
Carrying Amount	$	981.5	$	304.1	$	383.0	$	359.4	$	180.0	$	352.4	$	2,560.4
Loan-to-Value Ratio(1)
<=65%	$	779.1	$	146.9	$	163.0	$	80.7	$	54.3	$	124.7	$	1,348.7
>65<=75%	115.7		115.4		215.4		280.1		126.4		228.5		1,081.5
>75%<=85%	89.3		26.3		—		—		—		—		115.6
>85%	—		16.9		6.0		—		—		—		22.9
Total Amortized Cost	984.1		305.5		384.4		360.8		180.7		353.2		2,568.7
Allowance for credit losses	(2.6)		(1.4)		(1.4)		(1.4)		(0.7)		(0.8)		(8.3)
Carrying Amount	$	981.5	$	304.1	$	383.0	$	359.4	$	180.0	$	352.4	$	2,560.4

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

Financing Receivable, Allowance for Credit Loss

The following tables present a roll forward of allowance for expected credit losses by loan-to-value ratio for the years ended December 31, 2022 and 2021:

	Year Ended December 31, 2022
	Beginning of Period		Current Period Provisions		Write-Offs		Recoveries		End of Period
	(in millions of dollars)
Loan-to-Value Ratio(1)
<=65%	$	2.6	$	0.4	$	—	$	—	$	3.0
>65<=75%	4.7		—		—		—		4.7
>75%<=85%	0.7		0.4		—		—		1.1
>85%	0.3		0.2		—		—		0.5
Total	$	8.3	$	1.0	$	—	$	—	$	9.3

	Year Ended December 31, 2021
	Beginning of Period		Current Period Provisions		Write-Offs		Recoveries		End of Period
	(in millions of dollars)
Loan-to-Value Ratio(1)
<=65%	$	3.4	$	(0.8)	$	—	$	—	$	2.6
>65<=75%	7.3		(2.6)		—		—		4.7
>75%<=85%	1.3		(0.6)		—		—		0.7
>85%	1.1		(0.8)		—		—		0.3
Total	$	13.1	$	(4.8)	$	—	$	—	$	8.3

(1)Loan-to Value Ratio utilizes the most recent internal appraisal of the property

Remaining Contractual Maturity of Securities Lending Agreements

The remaining contractual maturities of our securities lending agreements disaggregated by class of collateral pledged are as follows:

	December 31
	2022		2021
	Overnight and Continuous
	(in millions of dollars)
Borrowings
United States Government and Government Agencies and Authorities	$	0.3	$	0.1
State, Municipalities, and Political Subdivisions	—		0.1
Public Utilities	6.3		3.1
All Other Corporate Bonds	81.9		91.5
Total Borrowings	$	88.5	$	94.8
Gross Amount of Recognized Liability for Securities Lending Transactions	88.5		94.8
Amounts Related to Agreements Not Included in Offsetting Disclosure Contained Herein	$	—	$	—

Federal Home Loan Bank Common Stock Carrying Amounts, Amounts Posted, and Advances Received

The carrying value of common stock owned, collateral posted, and advances received are as follows:

	December 31
	2022		2021
	(in millions of dollars)
Carrying Value of FHLB Common Stock	$	17.1	$	22.1
Advances from FHLB	99.1		160.9
Carrying Value of Collateral Posted to FHLB
Fixed Maturity Securities	$	527.1	$	786.1
Commercial Mortgage Loans	801.9		930.0
Total Carrying Value of Collateral Posted to FHLB	$	1,329.0	$	1,716.1

Schedule of Financial Instrument and Derivative Offsetting

Shown below are our financial instruments that either meet the accounting requirements that allow them to be offset in our balance sheets or that are subject to an enforceable master netting arrangement or similar agreement. Our accounting policy is to not offset these financial instruments in our balance sheets. Net amounts disclosed below have been reduced by the amount of collateral pledged to or received from our counterparties.

	December 31, 2022
	Gross Amount						Gross Amount Not
	of Recognized		Gross Amount		Net Amount		Offset in Balance Sheet
	Financial		Offset in		Presented in		Financial		Cash		Net
	Instruments		Balance Sheet		Balance Sheet		Instruments		Collateral		Amount
	(in millions of dollars)
Financial Assets:
Derivatives	$	89.1	$	—	$	89.1	$	(38.0)	$	(49.4)	$	1.7
Securities Lending	152.4		—		152.4		(63.9)		(88.5)		—
Total	$	241.5	$	—	$	241.5	$	(101.9)	$	(137.9)	$	1.7
Financial Liabilities:
Derivatives	$	74.0	$	—	$	74.0	$	(73.2)	$	—	$	0.8
Securities Lending	88.5		—		88.5		(88.5)		—		—
Total	$	162.5	$	—	$	162.5	$	(161.7)	$	—	$	0.8

	December 31, 2021
	Gross Amount						Gross Amount Not
	of Recognized		Gross Amount		Net Amount		Offset in Balance Sheet
	Financial		Offset in		Presented in		Financial		Cash		Net
	Instruments		Balance Sheet		Balance Sheet		Instruments		Collateral		Amount
	(in millions of dollars)
Financial Assets:
Derivatives	$	39.5	$	—	$	39.5	$	(9.8)	$	(28.4)	$	1.3
Securities Lending	283.7		—		283.7		(188.9)		(94.8)		—
Total	$	323.2	$	—	$	323.2	$	(198.7)	$	(123.2)	$	1.3
Financial Liabilities:
Derivatives	$	35.0	$	—	$	35.0	$	(34.0)	$	—	$	1.0
Securities Lending	94.8		—		94.8		(94.8)		—		—
Total	$	129.8	$	—	$	129.8	$	(128.8)	$	—	$	1.0

Net Investment Income

Net investment income reported in our consolidated statements of income is presented below.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities	$	1,849.8	$	1,888.2	$	2,164.0
Derivatives	57.8		68.6		78.7
Mortgage Loans	101.5		105.0		108.9
Policy Loans	20.0		19.7		20.0
Other Long-term Investments
Perpetual Preferred Securities1	5.0		6.9		(2.1)
Private Equity Partnerships2	110.1		165.4		19.8
Other	9.4		5.5		3.9
Short-term Investments	20.0		1.3		10.5
Gross Investment Income	2,173.6		2,260.6		2,403.7
Less Investment Expenses	39.4		35.1		30.6
Less Investment Income on Participation Fund Account Assets	12.0		12.3		12.4
Net Investment Income	$	2,122.2	$	2,213.2	$	2,360.7

1 The net unrealized gain (loss) recognized in net investment income for the year ended December 31, 2022 related to perpetual preferred securities still held at December 31, 2022 was $2.8 million. The net unrealized gain (loss) recognized in net investment income for the years ended December 31, 2021 and 2020 related to perpetual preferred securities still held at year-end was $4.4 million and $(4.6) million, respectively

2 Represents a net unrealized gain for the year ended December 31, 2022 related to private equity partnerships still held at December 31, 2022 of $124.1 million, reduced by net management fees and partnership expenses of $(14.0) million. For the years ended December 31, 2021 and 2020, the net unrealized gain related to private equity partnerships still held at year-end was $177.7 million and $29.1 million, respectively, reduced by net management fees and partnership expenses of $(12.3) million and $(9.3) million, respectively. See Note 2 for further discussion of private equity partnerships.

^[1]

Realized Investment Gains and Losses Reported in Consolidated Statements of Income

Investment Gain and Loss

Investment gains and losses are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities
Gross Gains on Sales1	$	2.3	$	76.2	$	1,332.8
Gross Losses on Sales	(28.8)		(11.5)		(20.3)
Credit Losses	(4.6)		(9.3)		(53.6)
Mortgage Loans and Other Invested Assets
Gross Gains on Sales	1.4		5.8		1.9
Gross Losses on Sales	—		—		(0.3)
Impairment Loss	—		—		(36.6)
Change in Allowance for Credit Losses	(1.0)		4.7		(4.6)
Embedded Derivative in Modified Coinsurance Arrangement	16.2		9.7		(17.0)
All Other Derivatives	2.6		3.1		(2.5)
Foreign Currency Transactions	(3.8)		(2.0)		(0.7)
Net Investment Gain (Loss)	$	(15.7)	$	76.7	$	1,199.1

1Gross gains on sales of fixed maturity securities for the year ended December 31, 2021 includes gains of $67.6 million as a result of the second phase of the reinsurance transaction that we completed during the first quarter of 2021. Gross gains on sales of fixed maturity securities for the year ended December 31, 2020 includes gains of $1,302.3 million as a result of the first phase of the reinsurance transaction that we completed during the fourth quarter of 2020. See Note 12 for further discussion.

Schedule of Unrealized Loss on Investments

The following charts indicate the length of time our fixed maturity securities have been in a gross unrealized loss position.

	December 31, 2022
	Less Than 12 Months				12 Months or Greater
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	246.6	$	22.6	$	12.2	$	3.3
States, Municipalities, and Political Subdivisions	1,920.1		476.1		346.6		159.8
Foreign Governments	160.1		47.9		176.9		68.0
Public Utilities	2,242.2		252.0		255.2		103.0
Mortgage/Asset-Backed Securities	386.6		27.0		0.1		—
All Other Corporate Bonds	15,865.6		1,799.7		2,194.1		768.1
Redeemable Preferred Stocks	3.5		0.5		—		—
Total Fixed Maturity Securities	$	20,824.7	$	2,625.8	$	2,985.1	$	1,102.2

	December 31, 2021
	Less Than 12 Months				12 Months or Greater
	Fair Value		Gross Unrealized Loss		Fair Value		Gross Unrealized Loss
	(in millions of dollars)
United States Government and Government Agencies and Authorities	$	9.3	$	0.1	$	—	$	—
States, Municipalities, and Political Subdivisions	326.4		6.9		0.4		—
Foreign Governments	234.4		18.9		10.7		1.8
Public Utilities	263.3		9.1		17.6		0.7
Mortgage/Asset-Backed Securities	29.2		—		0.1		—
All Other Corporate Bonds	2,146.3		51.6		199.4		11.0
Total Fixed Maturity Securities	$	3,008.9	$	86.6	$	228.2	$	13.5

[1] Represents a net unrealized gain for the year ended December 31, 2022 related to private equity partnerships still held at December 31, 2022 of $124.1 million, reduced by net management fees and partnership expenses of $(14.0) million. For the years ended December 31, 2021 and 2020, the net unrealized gain related to private equity partnerships still held at year-end was $177.7 million and $29.1 million, respectively, reduced by net management fees and partnership expenses of $(12.3) million and $(9.3) million, respectively. See Note 2 for further discussion of private equity partnerships.

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Derivative Financial Instruments (Tables)

12 Months Ended

Dec. 31, 2022

Derivative Instruments and Hedging Activities Disclosure [Abstract]

Nature and Amount of Collateral Received From and Posted To Derivative Counterparty

The table below summarizes the nature and amount of collateral received from and posted to our derivative counterparties.

	December 31
	2022		2021
	(in millions of dollars)
Carrying Value of Collateral Received from Counterparties
Cash	$	49.4	$	32.0
Carrying Value of Collateral Posted to Counterparties
Cash	$	5.1	$	—
Fixed Maturity Securities	39.6		27.6
	$	44.7	$	27.6

Fair Value Hedges Carrying Amount of Hedged Assets and Liabilities and Cumulative Basis Adjustments

The following table summarizes the carrying amount of hedged assets and the related cumulative basis adjustments related to our fair value hedges:

	Carrying Amount of Hedged Assets				Cumulative Amount of Fair Value Hedging Adjustment Included in the Carrying Amount of the Hedged Assets
	December 31, 2022		December 31, 2021		December 31, 2022		December 31, 2021
	(in millions of dollars)
Fixed maturity securities:
Receive fixed functional currency interest, pay fixed foreign currency interest	$	394.4	$	466.3	$	(24.8)	$	2.0

Location and Fair Values of Derivative Financial Instruments

The following tables summarize the notional amounts and fair values of derivative financial instruments, as reported in our consolidated balance sheets. Derivative assets are included in other long-term investments, while derivative liabilities are included in other liabilities within our consolidated balance sheets. The notional amounts represent the basis upon which our counterparty pay and receive amounts are calculated.

	December 31, 2022
			Derivative Assets		Derivative Liabilities
	Notional Amount		Fair Value		Fair Value
	(in millions of dollars)
Designated as Hedging Instruments
Cash Flow Hedges
Forward Benchmark Interest Rate Locks	$	764.0	$	1.6	$	48.4
Foreign Currency Interest Rate Swaps	168.9		17.5		3.1
Total Cash Flow Hedges	932.9		19.1		51.5
Fair Value Hedges
Foreign Currency Interest Rate Swaps	557.8		66.0		5.4
Total Designated as Hedging Instruments	$	1,490.7	$	85.1	$	56.9
Not Designated as Hedging Instruments
Foreign Currency Forwards	$	54.3	$	4.0	$	0.1
Foreign Currency Interest Rate Swaps	132.0		—		17.0
Total Return Swaps	76.9		—		—
Embedded Derivative in Modified Coinsurance Arrangement	—		—		13.9
Total Not Designated as Hedging Instruments	$	263.2	$	4.0	$	31.0
Total Derivatives	$	1,753.9	$	89.1	$	87.9

	December 31, 2021
			Derivative Assets		Derivative Liabilities
	Notional Amount		Fair Value		Fair Value
	(in millions of dollars)
Designated as Hedging Instruments
Cash Flow Hedges
Foreign Currency Interest Rate Swaps	$	181.3	$	16.2	$	7.0
Fair Value Hedges
Foreign Currency Interest Rate Swaps	498.5		21.9		5.7
Total Designated as Hedging Instruments	$	679.8	$	38.1	$	12.7
Not Designated as Hedging Instruments
Credit Default Swaps	$	11.6	$	—	$	—
Foreign Currency Forwards	41.7		—		—
Foreign Currency Interest Rate Swaps	148.2		1.4		22.3
Total Return Swaps	89.2		—		—
Embedded Derivative in Modified Coinsurance Arrangement	—		—		30.1
Total Not Designated as Hedging Instruments	$	290.7	$	1.4	$	52.4
Total Derivatives	$	970.5	$	39.5	$	65.1

Location of Gains and Losses on Derivative Instruments Designated as Cash Flow Hedging Instruments

The following tables summarize the location of gains and losses of derivative financial instruments designated as hedging instruments, as reported in our consolidated statements of income.

	Year Ended December 31, 2022
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,122.2	$	(15.7)	$	188.5
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	200.0		—		2.9
Derivatives Designated as Hedging Instruments	51.0		—		—
Foreign Exchange Contracts:
Hedged items	12.3		(2.3)		—
Derivatives Designated as Hedging Instruments	(0.8)		1.8		—
Forward Benchmark Interest Rate Locks:
Hedged items	0.5		—		—
Gain (Loss) on Fair Value Hedging Relationships
Foreign Exchange Contracts:
Hedged items	11.6		(26.8)		—
Derivatives Designated as Hedging Instruments	7.3		26.8		—

	Year Ended December 31, 2021
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,213.2	$	76.7	$	185.0
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	220.4		2.7		29.2
Derivatives Designated as Hedging Instruments	64.6		2.0		5.0
Foreign Exchange Contracts:
Hedged items	13.0		(0.1)		—
Derivatives Designated as Hedging Instruments	1.8		(0.1)		—
Gain (Loss) on Fair Value Hedging Relationships
Foreign Exchange Contracts:
Hedged items	9.8		(22.3)		—
Derivatives Designated as Hedging Instruments	4.6		22.3		—

	Year Ended December 31, 2020
	Net Investment Income		Net Investment Gain (Loss)		Interest and Debt Expense
	(in millions of dollars)
Total Income and Expense Presented in the Consolidated Statements of Income of Which Hedged Items are Recorded	$	2,360.7	$	1,199.1	$	188.2
Gain (Loss) on Cash Flow Hedging Relationships
Interest Rate Swaps:
Hedged items	286.1		397.7		29.2
Derivatives Designated as Hedging Instruments	75.9		32.0		1.7
Foreign Exchange Contracts:
Hedged items	12.1		(0.1)		—
Derivatives Designated as Hedging Instruments	2.5		0.1		—
Gain (Loss) on Fair Value Hedging Relationships
Interest Rate Swaps:
Hedged items	—		(0.6)		10.1
Derivatives Designated as Hedging Instruments	—		0.6		(0.9)
Foreign Exchange Contracts:
Hedged items	7.1		23.3		—
Derivatives Designated as Hedging Instruments	2.8		(23.3)		—

Schedule of Cash Flow Hedges Included in Accumulated Other Comprehensive Income (Loss)

The following table summarizes the location of gains and losses of derivative financial instruments designated as cash flow hedging instruments, as reported in our consolidated statements of comprehensive income (loss).

		Year Ended December 31
		2022		2021		2020
		(in millions of dollars)
Gain (Loss) Recognized in Other Comprehensive Income (Loss) on Derivatives
Forwards		$	(49.8)	$	(0.6)	$	—
Foreign Exchange Contracts		7.4		2.2		(5.4)
	Total	$	(42.4)	$	1.6	$	(5.4)

Gains and Losses on Derivatives Not Designated as Hedging Instruments

The following table summarizes the location of gains and losses on our derivatives not designated as hedging instruments, as reported in our consolidated statements of income.

		Year Ended December 31
		2022		2021		2020
		(in millions of dollars)
Net Investment Gain (Loss)
	Credit Default Swaps	$	—	$	(0.3)	$	(0.5)
	Foreign Exchange Contracts	2.7		3.4		(2.0)
	Embedded Derivative in Modified Coinsurance Arrangement	16.2		9.7		(17.0)
	Total	$	18.9	$	12.8	$	(19.5)
Other Expenses
	(Gain) Loss on Total Return Swaps	$	18.9	$	(8.5)	$	—

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Accumulated Other Comprehensive Income (Tables)

12 Months Ended

Dec. 31, 2022

Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Accumulated Other Comprehensive Income (Loss)

Components of our accumulated other comprehensive income (loss), after tax, and related changes are as follows:

	Net Unrealized Gain (Loss) on Securities		Net Gain (Loss) on Hedges		Foreign Currency Translation Adjustment		Unrecognized Pension and Postretirement Benefit Costs		Total
	(in millions of dollars)
Balances at December 31, 2019	$	615.9	$	187.8	$	(281.6)	$	(484.8)	$	37.3
Other Comprehensive Income (Loss) Before Reclassifications	405.6		(5.7)		20.3		(60.8)		359.4
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	46.2		(84.3)		—		15.6		(22.5)
Net Other Comprehensive Income (Loss)	451.8		(90.0)		20.3		(45.2)		336.9
Balances at December 31, 2020	1,067.7		97.8		(261.3)		(530.0)		374.2
Other Comprehensive Income (Loss) Before Reclassifications	(169.9)		14.7		(12.6)		116.3		(51.5)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	64.4		(50.7)		—		17.7		31.4
Net Other Comprehensive Income (Loss)	(105.5)		(36.0)		(12.6)		134.0		(20.1)
Balances at December 31, 2021	962.2		61.8		(273.9)		(396.0)		354.1
Other Comprehensive Income (Loss) Before Reclassifications	(3,009.2)		(30.4)		(115.2)		49.7		(3,105.1)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	23.2		(41.0)		—		12.2		(5.6)
Net Other Comprehensive Income (Loss)	(2,986.0)		(71.4)		(115.2)		61.9		(3,110.7)
Balances at December 31, 2022	$	(2,023.8)	$	(9.6)	$	(389.1)	$	(334.1)	$	(2,756.6)

Schedule of Components of Unrealized Gain (Loss) on Securities

The net unrealized gain (loss) on securities consists of the following components:

	December 31								Change for the Year Ended December 31
	2022		2021		2020		2019		2022		2021		2020
	(in millions of dollars)
Fixed Maturity Securities	$	(2,984.4)	$	5,949.3	$	7,597.6	$	6,364.4	$	(8,933.7)	$	(1,648.3)	$	1,233.2
Deferred Acquisition Costs	11.3		(70.4)		(85.1)		(62.7)		81.7		14.7		(22.4)
Reserves for Future Policy and Contract Benefits	566.7		(4,659.5)		(6,225.6)		(5,803.1)		5,226.2		1,566.1		(422.5)
Reinsurance Recoverable	(18.1)		132.1		200.2		424.7		(150.2)		(68.1)		(224.5)
Income Tax	400.7		(389.3)		(419.4)		(307.4)		790.0		30.1		(112.0)
Total	$	(2,023.8)	$	962.2	$	1,067.7	$	615.9	$	(2,986.0)	$	(105.5)	$	451.8

Schedule of Reclassification out of Accumulated Other Comprehensive Income (Loss)

Amounts reclassified from accumulated other comprehensive income (loss) were recognized in our consolidated statements of income as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Net Unrealized Loss on Securities
Net Investment Gain (Loss)
Gain (Loss) on Sales on Securities	$	(24.8)	$	60.8	$	1,279.7
Credit Losses on Fixed Maturity Securities	(4.6)		(9.3)		(53.6)
Loss on Benefits and Change in Reserves for Future Benefits	—		(133.1)		(1,284.5)
	(29.4)		(81.6)		(58.4)
Income Tax Benefit	(6.2)		(17.2)		(12.2)
Total	$	(23.2)	$	(64.4)	$	(46.2)
Net Gain (Loss) on Hedges
Net Investment Income
Gain on Interest Rate Swaps and Forwards	$	51.1	$	60.6	$	74.1
Gain (Loss) on Foreign Exchange Contracts	(1.0)		1.7		2.0
Net Investment Gain (Loss)
Gain on Interest Rate Swaps	—		2.0		32.0
Gain (Loss) on Foreign Exchange Contracts	1.8		(0.1)		0.1
Interest and Debt Expense
Loss on Interest Rate Swaps	—		—		(1.5)
	51.9		64.2		106.7
Income Tax Expense	10.9		13.5		22.4
Total	$	41.0	$	50.7	$	84.3
Unrecognized Pension and Postretirement Benefit Costs
Other Expenses
Amortization of Net Actuarial Loss	$	(15.7)	$	(22.6)	$	(19.8)
Amortization of Prior Service Credit	0.2		0.2		0.1
Curtailment Gain	—		—		(0.1)
	(15.5)		(22.4)		(19.8)
Income Tax Benefit	(3.3)		(4.7)		(4.2)
Total	$	(12.2)	$	(17.7)	$	(15.6)

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Liability for Unpaid Claims and Claim Adjustment Expenses (Tables)

12 Months Ended

Dec. 31, 2022

Insurance [Abstract]

Schedule of Liability for Unpaid Claims and Claims Adjustment Expense

Changes in the liability for unpaid claims and claim adjustment expenses are as follows:

	2022		2021		2020
	(in millions of dollars)
Balance at January 1	$	23,664.7	$	24,180.2	$	23,076.7
Less Reinsurance Recoverable	8,697.8		8,378.9		2,246.8
Net Balance at January 1	14,966.9		15,801.3		20,829.9
Incurred Related to
Current Year	6,721.3		7,252.6		6,327.8
Prior Years
Interest	595.6		683.4		997.8
All Other Incurred	(646.0)		(719.5)		878.7
Foreign Currency	(235.9)		(23.4)		65.9
Total Incurred	6,435.0		7,193.1		8,270.2
Paid Related to
Current Year	(3,062.9)		(3,263.4)		(2,727.0)
Prior Years	(3,786.0)		(3,774.1)		(4,430.3)
Total Paid	(6,848.9)		(7,037.5)		(7,157.3)
Reserves Ceded Pursuant to Reinsurance Transaction	—		(990.0)		(6,141.5)
Net Balance at December 31	14,553.0		14,966.9		15,801.3
Plus Reinsurance Recoverable	8,279.8		8,697.8		8,378.9
Balance at December 31	$	22,832.8	$	23,664.7	$	24,180.2

Reconciliation of Policy and Contract Benefits and Reserves for Future Policy and Contract Benefits to Balance Sheet Amounts

A reconciliation of policy and contract benefits and reserves for future policy and contract benefits as reported in our consolidated balance sheets to the liability for unpaid claims and claim adjustment expenses is as follows:

	December 31
	2022		2021		2020
	(in millions of dollars)
Policy and Contract Benefits	$	1,839.8	$	1,907.7	$	1,855.4
Reserves for Future Policy and Contract Benefits	42,330.2		48,007.5		49,653.0
Total	44,170.0		49,915.2		51,508.4
Less:
Life Reserves for Future Policy and Contract Benefits	8,428.5		8,457.1		8,371.7
Accident and Health Active Life Reserves	13,475.4		13,133.9		12,730.9
Adjustment Related to Unrealized Investment Gains (Losses)	(566.7)		4,659.5		6,225.6
Liability for Unpaid Claims and Claim Adjustment Expenses	$	22,832.8	$	23,664.7	$	24,180.2

The adjustment related to unrealized investment gains and losses reflects the changes that would be necessary to policyholder liabilities if the unrealized investment gains and losses related to the corresponding available-for-sale securities had been realized. Changes in this adjustment are reported as a component of other comprehensive income or loss.

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Income Tax (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Components of Income Tax Expense (Benefit)

Total income tax expense (benefit) is allocated as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Net Income	$	317.2	$	238.8	$	171.0
Stockholders' Equity - Accumulated Other Comprehensive Income (Loss)
Change in Net Unrealized Gain (Loss) on Securities Before Adjustment	(1,890.8)		(346.9)		250.2
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance	1,100.8		316.8		(138.2)
Change in Net Gain (Loss) on Hedges	(19.2)		(9.8)		(23.8)
Change in Foreign Currency Translation Adjustment	(0.1)		4.2		(4.3)
Change in Unrecognized Pension and Postretirement Benefit Costs	18.9		42.1		(34.8)
Total	$	(473.2)	$	245.2	$	220.1

Schedule of Effective Income Tax Rate Reconciliation

A reconciliation of the income tax provision at the U.S. federal statutory rate to the income tax rate as reported in our consolidated statements of income is as follows:

	Year Ended December 31
	2022		2021		2020
Statutory Income Tax	21.0	%	21.0	%	21.0	%
Net Operating Loss Carryback	—		(0.7)		(3.8)
Tax Exempt Income	(1.1)		(1.1)		(0.8)
Tax Credits	(0.3)		(0.9)		(1.3)
Policyholder Reserves	(1.9)		2.4		0.7
Other Items, Net	1.7		1.8		1.9
Effective Tax	19.4	%	22.5	%	17.7	%

Schedule of Deferred Tax Assets and Liabilities

Our net deferred tax asset (liability) consists of the following.

	December 31
	2022		2021
	(in millions of dollars)
Deferred Tax Asset
Invested Assets	$	664.9	$	—
Reserves	—		889.7
Employee Benefits	158.3		176.6
Other	34.4		57.5
Gross Deferred Tax Asset	857.6		1,123.8
Less: Valuation Allowance	10.3		12.7
Net Deferred Tax Asset	847.3		1,111.1
Deferred Tax Liability
Deferred Acquisition Costs	113.1		134.9
Fixed Assets	48.9		71.1
Invested Assets	—		1,144.9
Reserves	43.2		—
Cost of Reinsurance	156.8		171.6
Other	44.7		47.0
Gross Deferred Tax Liability	406.7		1,569.5
Net Deferred Tax Asset (Liability)	$	440.6	$	(458.4)

Schedule of Income before Income Tax, Domestic and Foreign

Our consolidated statements of income include amounts subject to both domestic and foreign taxation. The income and related tax expense (benefit) are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Income Before Tax
Domestic	$	1,492.8	$	957.0	$	924.7
Foreign	138.6		106.0		39.3
Total	$	1,631.4	$	1,063.0	$	964.0
Current Tax Expense (Benefit)
Federal	$	306.5	$	180.7	$	(98.4)
State and Local	12.7		2.6		1.5
Foreign	154.3		29.5		(19.7)
Total	473.5		212.8		(116.6)
Deferred Tax Expense (Benefit)
Federal	20.9		13.3		250.5
State and Local	1.1		(2.2)		1.0
Foreign	(178.3)		14.9		36.1
Total	(156.3)		26.0		287.6
Total Tax Expense	$	317.2	$	238.8	$	171.0

Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible

Our consolidated statements of income include the following changes in unrecognized tax benefits.

	December 31
	2022		2021		2020
	(in millions of dollars)
Balance at Beginning of Year	$	198.8	$	219.7	$	241.0
Decreases for Tax Positions Related to Prior Years	(21.0)		(20.9)		(21.0)
Lapse of the Applicable Statute of Limitations	(0.4)		—		(0.3)
Balance at End of Year	177.4		198.8		219.7
Less Tax Attributable to Temporary Items Included Above	(63.5)		(84.7)		(105.9)
Total Unrecognized Tax Benefits That if Recognized Would Affect the Effective Tax Rate	$	113.9	$	114.1	$	113.8

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Debt (Tables)

12 Months Ended

Dec. 31, 2022

Debt Disclosure [Abstract]

Schedule of Debt

Debt consists of the following:

			December 31
			2022		2021
	Interest Rates	Maturities	(in millions of dollars)
Outstanding Principal
Senior Notes issued 1998	6.750 - 7.250%	2028	$	335.8	$	335.8
Senior Notes issued 2002	7.375%	2032	39.5		39.5
Senior Notes issued 2012 and 2016	5.750%	2042	500.0		500.0
Senior Notes issued 2014	4.000%	2024	—		350.0
Senior Notes issued 2015	3.875%	2025	275.0		275.0
Senior Notes issued 2019	4.000%	2029	400.0		400.0
Senior Notes issued 2019	4.500%	2049	450.0		450.0
Senior Notes issued 2021	4.125%	2051	600.0		600.0
Medium-term Notes issued 1990 - 1996	7.000 - 7.190%	2023 - 2028	18.5		20.5
Junior Subordinated Debt Securities issued 1998	7.405%	2038	189.7		203.7
Junior Subordinated Debt Securities issued 2018	6.250%	2058	300.0		300.0
Term Loan issued 2022	Variable	2027	350.0		—
Less:
Unamortized Net Premium			2.5		2.3
Unamortized Debt Issuance Costs			(33.2)		(34.6)
Total Long-term Debt			$	3,427.8	$	3,442.2
Short-term Debt
Medium-term Notes Issued 1990	7.000%	2023	2.0		—
Total Debt			$	3,429.8	$	3,442.2

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Employee Benefit Plans (Tables)

12 Months Ended

Dec. 31, 2022

Defined Benefit Plans and Other Postretirement Benefit Plans

Schedule of Changes in Projected Benefit Obligations and Fair Value of Plan Assets

The following table provides the changes in the benefit obligation and fair value of plan assets and the funded status of the plans.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Change in Benefit Obligation
Benefit Obligation at Beginning of Year	$	2,207.5	$	2,277.2	$	278.3	$	300.0	$	110.3	$	120.5
Service Cost	7.7		9.6		—		—		—		—
Interest Cost	67.2		65.0		5.0		4.2		3.0		3.0
Plan Participant Contributions	—		—		—		—		0.1		0.1
Actuarial Gain (1)	(604.1)		(57.9)		(92.4)		(18.0)		(19.4)		(3.0)
Benefits and Expenses Paid	(92.8)		(86.4)		(5.4)		(5.2)		(10.1)		(10.3)
Change in Foreign Exchange Rates	—		—		(27.6)		(2.7)		—		—
Benefit Obligation at End of Year	$	1,585.5	$	2,207.5	$	157.9	$	278.3	$	83.9	$	110.3
Accumulated Benefit Obligation at December 31	$	1,585.5	$	2,207.5	$	158.0	$	276.5	N/A		N/A
Change in Fair Value of Plan Assets
Fair Value of Plan Assets at Beginning of Year	$	1,801.7	$	1,710.9	$	303.7	$	294.1	$	9.0	$	9.3
Actual Return on Plan Assets	(410.6)		167.6		(128.4)		18.0		0.1		0.1
Employer Contributions	10.0		9.6		—		—		9.4		9.8
Plan Participant Contributions	—		—		—		—		0.1		0.1
Benefits and Expenses Paid	(92.8)		(86.4)		(5.4)		(5.2)		(10.1)		(10.3)
Change in Foreign Exchange Rates	—		—		(29.4)		(3.2)		—		—
Fair Value of Plan Assets at End of Year	$	1,308.3	$	1,801.7	$	140.5	$	303.7	$	8.5	$	9.0
Underfunded (Overfunded) Status	$	277.2	$	405.8	$	17.4	$	(25.4)	$	75.4	$	101.3

(1) The actuarial gains recognized in 2022 and 2021 for the U.S., OPEB, and U.K. plans were primarily driven by increases in the discount rate assumption.

Schedule of Amounts Recognized in Balance Sheet

The amounts recognized in our consolidated balance sheets for our pension and OPEB plans at December 31, 2022 and 2021 are as follows.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Current Liability	$	8.8	$	8.4	$	—	$	—	$	1.1	$	1.4
Noncurrent Liability	268.4		397.4		17.4		—		74.3		99.9
Noncurrent Asset	—		—		—		(25.4)		—		—
Underfunded (Overfunded) Status	$	277.2	$	405.8	$	17.4	$	(25.4)	$	75.4	$	101.3
Unrecognized Pension and Postretirement Benefit Costs
Net Actuarial Gain (Loss)	$	(517.8)	$	(621.8)	$	(83.7)	$	(42.9)	$	31.6	$	13.6
Prior Service Credit (Cost)	(0.6)		(0.6)		(0.2)		(0.2)		2.5		2.7
	(518.4)		(622.4)		(83.9)		(43.1)		34.1		16.3
Income Tax	213.5		239.2		19.5		9.1		1.1		4.9
Total Included in Accumulated Other Comprehensive Income (Loss)	$	(304.9)	$	(383.2)	$	(64.4)	$	(34.0)	$	35.2	$	21.2

Schedule of Amounts Recognized in Other Comprehensive Income (Loss)

The following table provides the changes recognized in other comprehensive income for the years ended December 31, 2022 and 2021.

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
	(in millions of dollars)
Accumulated Other Comprehensive Income (Loss) at Beginning of Year	$	(383.2)	$	(494.6)	$	(34.0)	$	(54.7)	$	21.2	$	19.3
Net Actuarial Gain (Loss)
Amortization	16.3		21.3		0.4		1.3		(1.0)		—
All Other Changes	87.7		124.8		(41.2)		26.3		19.0		2.6
Prior Service Credit (Cost)
Amortization	—		—		—		—		(0.2)		(0.2)
Change in Income Tax	(25.7)		(34.7)		10.4		(6.9)		(3.8)		(0.5)
Accumulated Other Comprehensive Income (Loss) at End of Year	$	(304.9)	$	(383.2)	$	(64.4)	$	(34.0)	$	35.2	$	21.2

Schedule of Assumptions Used

We use a December 31 measurement date for each of our plans. The weighted average assumptions used in the measurement of our benefit obligations as of December 31 and our net periodic benefit costs for the years ended December 31 are as follows:

	Pension Benefits
	U.S. Plans				U.K. Plan				OPEB
	2022		2021		2022		2021		2022		2021
Benefit Obligations
Discount Rate	5.70	%	3.10	%	4.80	%	2.00	%	5.70	%	2.90	%
Rate of Compensation Increase	N/A		N/A		2.50	%	2.90	%	N/A		N/A
Net Periodic Benefit Cost
Discount Rate	3.10	%	2.90	%	2.00	%	1.40	%	2.90	%	2.60	%
Expected Return on Plan Assets	6.00	%	6.00	%	4.20	%	3.50	%	5.75	%	5.75	%
Rate of Compensation Increase	N/A		N/A		2.90	%	2.80	%	N/A		N/A

Schedule of Net Benefit Costs

Net Periodic Benefit Cost

The following table provides the components of the net periodic benefit cost (credit) for the years ended December 31.

	Pension Benefits
	U.S. Plans						U.K. Plan						OPEB
	2022		2021		2020		2022		2021		2020		2022		2021		2020
	(in millions of dollars)
Service Cost	$	7.7	$	9.6	$	11.0	$	—	$	—	$	—	$	—	$	—	$	—
Interest Cost	67.2		65.0		73.0		5.0		4.2		4.9		3.0		3.0		4.1
Expected Return on Plan Assets	(105.9)		(100.6)		(106.7)		(10.9)		(9.8)		(9.5)		(0.5)		(0.5)		(0.5)
Amortization of:
Net Actuarial Loss (Gain)	16.3		21.3		18.7		0.4		1.3		1.1		(1.0)		—		—
Prior Service Cost (Credit)	—		—		0.1		—		—		—		(0.2)		(0.2)		(0.2)
Curtailment Gain	—		—		—		—		—		0.1		—		—		—
Total Net Periodic Benefit Cost (Credit)	$	(14.7)	$	(4.7)	$	(3.9)	$	(5.5)	$	(4.3)	$	(3.4)	$	1.3	$	2.3	$	3.4

Schedule of Expected Benefit Payments

The following table provides expected benefit payments, which reflect expected future service, as appropriate.

	Pension Benefits
	U.S. Plans		U.K. Plan		OPEB
	(in millions of dollars)
Year					Gross		Subsidy Payments		Net
2023	$	84.9	$	5.4	$	10.0	$	0.1	$	9.9
2024	88.2		5.5		9.4		0.1		9.3
2025	92.1		5.7		9.0		0.1		8.9
2026	96.5		5.8		8.5		—		8.5
2027	100.6		6.0		8.1		—		8.1
2028-2032	550.6		32.4		34.0		0.1		33.9

Pension Plan | UNITED STATES

Defined Benefit Plans and Other Postretirement Benefit Plans

Defined Benefit Plan, Plan Assets, Category

The categorization of fair value measurements by input level for the invested assets in our U.S. pension plans is shown below. The carrying values of investment-related receivables and payables approximate fair value due to the short-term nature of the securities and are not included in the following chart. Investments valued using net asset value (NAV) as a practical expedient are not required to be categorized by input level, but these investments are included as follows to reconcile to total invested assets. Certain prior year amounts were reclassified to conform to current year presentation.

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Equity Securities:
Global	$	57.4	$	—	$	—	$	405.7	$	463.1
Fixed Income Securities:
U.S. Government and Agencies1	194.0		21.7		—		—		215.7
Corporate	—		—		—		129.6		129.6
Non-U.S. Emerging Markets	—		—		—		54.0		54.0
Opportunistic Credits	—		—		—		132.3		132.3
Real Estate	—		—		—		164.2		164.2
Alternative Investments:
Private Equity Direct Investments	—		—		—		74.5		74.5
Private Equity Funds of Funds	—		—		—		47.6		47.6
Cash Equivalents	20.5		—		—		—		20.5
Total Invested Assets	$	271.9	$	21.7	$	—	$	1,007.9	$	1,301.5

1 U.S. Government and Agencies Fixed Income Securities includes derivative assets.

	December 31, 2021
	Quoted Prices in Active  Markets for  Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Equity Securities:
U.S. Large Cap	$	—	$	—	$	—	$	144.9	$	144.9
U.S. Small Cap	32.8		—		—		30.5		63.3
Global	—		—		—		388.7		388.7
Emerging Markets	—		—		—		59.8		59.8
Fixed Income Securities:
U.S. Government and Agencies1	419.3		—		—		—		419.3
Corporate	—		—		—		103.3		103.3
Opportunistic Credits	—		—		—		212.5		212.5
Real Estate	—		—		—		247.1		247.1
Alternative Investments:
Private Equity Direct Investments	—		—		—		80.4		80.4
Private Equity Funds of Funds	—		—		—		50.5		50.5
Cash Equivalents	31.9		—		—		—		31.9
Total Invested Assets	$	484.0	$	—	$	—	$	1,317.7	$	1,801.7

1 U.S. Government and Agencies Fixed Income Securities includes derivative assets.

Pension Plan | UNITED KINGDOM

Defined Benefit Plans and Other Postretirement Benefit Plans

Defined Benefit Plan, Plan Assets, Category

The categorization of fair value measurements by input level for the invested assets in our U.K. pension plan is shown below. Investments valued using NAV as a practical expedient are not required to be categorized by input level, but these investments are included as follows to reconcile to total invested assets.

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Diversified Growth Assets	$	32.3	$	—	$	—	$	8.3	$	40.6
Fixed Income and Index-linked Securities	70.6		—		—		—		70.6
Alternative Investments	—		—		—		28.1		28.1
Cash Equivalents	1.9		—		—		—		1.9
Total Invested Assets	$	104.8	$	—	$	—	$	36.4	$	141.2

	December 31, 2021
	Quoted Prices in Active  Markets for  Identical Assets (Level 1)		Significant  Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		NAV as a Practical Expedient		Total
	(in millions of dollars)
Invested Assets
Diversified Growth Assets	$	113.1	$	—	$	—	$	44.2	$	157.3
Fixed Income and Index-linked Securities	124.1		—		—		—		124.1
Alternative Investments	—		—		—		18.2		18.2
Cash Equivalents	4.1		—		—		—		4.1
Total Invested Assets	$	241.3	$	—	$	—	$	62.4	$	303.7

Other Postretirement Benefit Plans

Defined Benefit Plans and Other Postretirement Benefit Plans

Defined Benefit Plan, Plan Assets, Category

The categorization of fair value measurements by input level for the assets in our OPEB plan is as follows:

	December 31, 2022
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in millions of dollars)
Assets
Life Insurance Contracts	$	—	$	—	$	8.5	$	8.5

	December 31, 2021
	Quoted Prices in Active Markets for Identical Assets (Level 1)		Significant Other Observable Inputs (Level 2)		Significant Unobservable Inputs (Level 3)		Total
	(in millions of dollars)
Assets
Life Insurance Contracts	$	—	$	—	$	9.0	$	9.0

Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets

Changes in our OPEB plan assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3) during the years ended December 31, 2022 and 2021 are as follows:

	Year Ended December 31, 2022
	Beginning of Year		Actual Return on Plan Assets		Contributions		Net Benefits and Expenses Paid		End of Year
	(in millions of dollars)
Life Insurance Contracts	$	9.0	$	0.1	$	9.5	$	(10.1)	$	8.5

	Year Ended December 31, 2021
	Beginning of Year		Actual Return on Plan Assets		Contributions		Net Benefits and Expenses Paid		End of Year
	(in millions of dollars)
Life Insurance Contracts	$	9.3	$	0.1	$	9.9	$	(10.3)	$	9.0

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Stockholders' Equity and Earnings Per Common Share (Tables)

12 Months Ended

Dec. 31, 2022

Stockholders' Equity and Earnings Per Common Share [Abstract]

Schedule of Basic and Diluted Earnings Per Share

Net income per common share is determined as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars, except share data)
Numerator
Net Income	$	1,314.2	$	824.2	$	793.0
Denominator (000s)
Weighted Average Common Shares - Basic	200,647.2		204,232.9		203,642.0
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	1,462.2		615.0		113.3
Weighted Average Common Shares - Assuming Dilution	202,109.4		204,847.9		203,755.3
Net Income Per Common Share
Basic	$	6.55	$	4.04	$	3.89
Assuming Dilution	$	6.50	$	4.02	$	3.89

Treasury Stock Transactions

Common stock repurchases, which are accounted for using the cost method and classified as treasury stock until otherwise retired, were as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions)
Shares Repurchased	5.7		1.9		—
Cost of Shares Repurchased1	$	200.1	$	50.0	$	—

1 Includes commissions of $0.1 million for the year ended December 31, 2022.

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Stock-Based Compensation (Tables)

12 Months Ended

Dec. 31, 2022

Share-based Compensation Arrangement by Share-based Payment Award

Schedule of Compensation Cost for Share-based Payment Arrangements

Compensation expense for the stock based plans, as reported in our consolidated statements of income, is as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Performance Share Units	$	5.7	$	3.3	$	5.6
Cash Incentive Units	12.8		3.2		—
Restricted Stock Units and Cash-Settled Restricted Stock Units	32.7		25.5		23.9
Stock Success Units	0.9		2.8		0.4
Other	0.6		0.6		0.5
Total Compensation Expense, Before Income Tax	$	52.7	$	35.4	$	30.4
Total Compensation Expense, Net of Income Tax	$	47.3	$	31.1	$	26.1

Performance Share Units

Share-based Compensation Arrangement by Share-based Payment Award

Valuation Assumptions on PSU Grants

The fair value of PSUs is estimated on the date of initial grant using the Monte-Carlo simulation model. Key assumptions used to value PSUs granted during 2020 are as follows:

	Year Ended December 31, 2020
Expected Volatility (based on our and our peer group historical daily stock prices)	23	%
Expected Life (equals the performance period)	3 years
Risk Free Interest Rate (based on U.S. Treasury yields at the date of grant)	0.85	%

Cash Incentive Units (CIUs)

Share-based Compensation Arrangement by Share-based Payment Award

Activity for CIUs

Activity for CIUs classified as a liability is as follows:

		Weighted Average
	Units	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	7,223	$	1.07
Granted	8,024	1.09
Outstanding at December 31, 2022	15,247	1.08

Schedule of Cash-based Payment Award, Cash-incentive Units, Valuation Assumptions

The fair value of CIUs is estimated at each reporting period using the Monte-Carlo simulation model. Key assumptions used to value CIUs granted during current year are as follows:

	Year Ended December 31
	2022		2021
Expected Volatility (based on our and our peer group historical daily stock prices)	30	%	50	%
Expected Life (equals the performance period)	3 years		3 years
Risk Free Interest Rate (based on U.S. Treasury yields at the date of grant)	4.26	%	0.71	%

Restricted Stock Units (RSUs)

Share-based Compensation Arrangement by Share-based Payment Award

Activity for Restricted Stock Units

Activity for RSUs classified as equity is as follows:

		Weighted Average
	Shares	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	2,016	$	26.63
Granted	1,323	28.21
Vested	(1,018)	27.51
Forfeited	(139)	26.19
Outstanding at December 31, 2022	2,182	27.20

Cash Settled RSUs

Share-based Compensation Arrangement by Share-based Payment Award

Share-based Payment Arrangement, Cash-Settled Restricted Stock Units, Activity

Activity for cash-settled RSUs classified as a liability is as follows:

		Weighted Average
	Shares	Grant Date
	(000s)	Fair Value
Outstanding at December 31, 2021	46	$	23.31
Vested	(23)	23.31
Outstanding at December 31, 2022	23	23.31

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Reinsurance (Tables)

12 Months Ended

Dec. 31, 2022

Reinsurance Disclosures [Abstract]

Effects of Reinsurance

Reinsurance activity related to both our premium income and changes in reserves for future benefits are as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Direct Premium Income	$	9,900.5	$	9,742.8	$	9,621.9
Reinsurance Assumed	78.7		90.6		94.1
Reinsurance Ceded	(355.8)		(352.4)		(337.9)
Net Premium Income	$	9,623.4	$	9,481.0	$	9,378.1
Ceded Benefits and Change in Reserves for Future Benefits	$	1,034.6	$	862.5	$	628.8

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Segment Information (Tables)

12 Months Ended

Dec. 31, 2022

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.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Premium Income
Unum US
Group Disability
Group Long-term Disability	$	1,911.7	$	1,827.8	$	1,828.5
Group Short-term Disability	926.3		864.0		799.2
Group Life and Accidental Death & Dismemberment
Group Life	1,669.1		1,641.9		1,640.5
Accidental Death & Dismemberment	173.7		165.1		163.9
Supplemental and Voluntary
Voluntary Benefits	840.6		846.7		875.2
Individual Disability	461.1		459.8		456.0
Dental and Vision	275.8		272.7		255.6
	6,258.3		6,078.0		6,018.9
Unum International
Unum UK
Group Long-term Disability	376.9		401.9		364.9
Group Life	138.2		112.3		108.5
Supplemental	114.0		112.6		99.8
Unum Poland	89.7		90.2		79.6
	718.8		717.0		652.8
Colonial Life
Accident, Sickness, and Disability	948.9		953.3		975.1
Life	401.1		384.7		376.4
Cancer and Critical Illness	352.0		352.2		360.5
	1,702.0		1,690.2		1,712.0
Closed Block
Long-term Care	697.4		704.3		666.9
All Other	246.9		291.5		327.5
	944.3		995.8		994.4
Total Premium Income	$	9,623.4	$	9,481.0	$	9,378.1

Selected Operating Statement Data by Segment

	Unum US		Unum International		Colonial Life		Closed Block		Corporate		Total
	(in millions of dollars)
Year Ended December 31, 2022
Premium Income	$	6,258.3	$	718.8	$	1,702.0	$	944.3	$	—	$	9,623.4
Net Investment Income	676.3		170.1		152.7		1,070.6		52.5		2,122.2
Other Income	196.3		0.9		1.1		58.0		4.8		261.1
Adjusted Operating Revenue	$	7,130.9	$	889.8	$	1,855.8	$	2,072.9	$	57.3	$	12,006.7
Adjusted Operating Income (Loss)	$	970.7	$	127.0	$	374.6	$	247.9	$	(164.3)	$	1,555.9
Interest and Debt Expense	$	—	$	—	$	—	$	—	$	192.7	$	192.7
Depreciation and Amortization	$	370.6	$	22.0	$	303.5	$	4.7	$	0.6	$	701.4
Year Ended December 31, 2021
Premium Income	$	6,078.0	$	717.0	$	1,690.2	$	995.8	$	—	$	9,481.0
Net Investment Income	721.6		132.7		172.0		1,159.0		27.9		2,213.2
Other Income	170.0		0.6		1.0		65.1		6.2		242.9
Adjusted Operating Revenue	$	6,969.6	$	850.3	$	1,863.2	$	2,219.9	$	34.1	$	11,937.1
Adjusted Operating Income (Loss)	$	464.9	$	105.7	$	329.2	$	394.7	$	(177.9)	$	1,116.6
Interest and Debt Expense	$	—	$	—	$	—	$	—	$	185.0	$	185.0
Depreciation and Amortization	$	400.9	$	21.0	$	275.4	$	5.1	$	0.7	$	703.1
Year Ended December 31, 2020
Premium Income	$	6,018.9	$	652.8	$	1,712.0	$	994.4	$	—	$	9,378.1
Net Investment Income	720.3		104.6		155.7		1,370.3		9.8		2,360.7
Other Income	154.9		0.5		1.1		66.6		1.1		224.2
Adjusted Operating Revenue	$	6,894.1	$	757.9	$	1,868.8	$	2,431.3	$	10.9	$	11,963.0
Adjusted Operating Income (Loss)	$	825.4	$	76.6	$	335.4	$	241.4	$	(200.8)	$	1,278.0
Interest and Debt Expense	$	—	$	—	$	—	$	3.1	$	185.1	$	188.2
Depreciation and Amortization	$	421.7	$	20.1	$	273.9	$	5.9	$	0.7	$	722.3

Deferred Policy Acquisition Costs by Segment

			Unum		Colonial
	Unum US		International		Life		Total
	(in millions of dollars)
Deferred Acquisition Costs
Year Ended December 31, 2022
Beginning of Year	$	1,096.2	$	35.4	$	1,076.3	$	2,207.9
Capitalization	273.1		12.0		271.8		556.9
Amortization	(294.9)		(7.6)		(288.5)		(591.0)
Adjustment Related to Unrealized Investment Gains and Losses	15.0		—		66.7		81.7
Foreign Currency	—		(3.2)		—		(3.2)
End of Year	$	1,089.4	$	36.6	$	1,126.3	$	2,252.3
Year Ended December 31, 2021
Beginning of Year	$	1,168.7	$	32.0	$	1,071.9	$	2,272.6
Capitalization	242.7		12.8		252.6		508.1
Amortization	(319.0)		(8.0)		(259.1)		(586.1)
Adjustment Related to Unrealized Investment Gains and Losses	3.8		—		10.9		14.7
Foreign Currency	—		(1.4)		—		(1.4)
End of Year	$	1,096.2	$	35.4	$	1,076.3	$	2,207.9
Year Ended December 31, 2020
Beginning of Year	$	1,223.0	$	26.4	$	1,074.6	$	2,324.0
Capitalization	291.5		12.1		272.6		576.2
Amortization	(341.0)		(7.4)		(257.7)		(606.1)
Adjustment Related to Unrealized Investment Gains and Losses	(4.8)		—		(17.6)		(22.4)
Foreign Currency	—		0.9		—		0.9
End of Year	$	1,168.7	$	32.0	$	1,071.9	$	2,272.6

Assets by Segment

	December 31
	2022		2021
	(in millions of dollars)
Assets
Unum US	$	16,278.7	$	18,696.3
Unum International	3,154.9		4,086.5
Colonial Life	4,448.9		4,895.9
Closed Block	34,241.2		38,287.9
Corporate	3,311.2		4,149.0
Total Assets	$	61,434.9	$	70,115.6

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
	2022		2021		2020
	(in millions of dollars)
Total Revenue	$	11,991.0	$	12,013.8	$	13,162.1
Excluding:
Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Adjusted Operating Revenue	$	12,006.7	$	11,937.1	$	11,963.0
Income Before Income Tax	$	1,631.4	$	1,063.0	$	964.0
Excluding:
Net Investment Gains and Losses
Net Realized Investment Gain Related to Reinsurance Transaction	—		67.6		1,302.3
Net Investment Gain (Loss), Other	(15.7)		9.1		(103.2)
Total Net Investment Gain (Loss)	(15.7)		76.7		1,199.1
Items Related to Closed Block Individual Disability Reinsurance Transaction
Change in Benefit Reserves and Transaction Costs	—		(139.3)		(1,305.5)
Amortization of the Cost of Reinsurance	(63.8)		(79.1)		(2.6)
Total Items Related to Closed Block Individual Disability Reinsurance Transaction	(63.8)		(218.4)		(1,308.1)
Net Reserve Change Related to Reserve Assumption Updates	155.0		181.4		(169.0)
Impairment Loss on Internal-Use Software	—		(12.1)		—
Cost Related to Early Retirement of Debt	—		(67.3)		—
Impairment Loss on ROU Asset	—		(13.9)		(12.7)
Costs Related to Organizational Design Update	—		—		(23.3)
Adjusted Operating Income	$	1,555.9	$	1,116.6	$	1,278.0

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Leases (Tables)

12 Months Ended

Dec. 31, 2022

Leases [Abstract]

Lease, Cost

Operating lease information is as follows:

	Year Ended December 31
	2022			2021			2020
	(in millions of dollars)
Lease Cost
Operating Lease Cost	$	19.6		$	35.2		$	48.6
Sublease Income	(1.1)			(1.0)			(1.3)
Total Lease Cost	$	18.5		$	34.2		$	47.3
Other Information
Cash Paid for Amounts Included in the Measurement of Lease Liabilities	$	23.1		$	29.9		$	30.8
Weighted-Average Remaining Lease Term	6 years			6 years			6 years
Weighted-Average Discount Rate	4.32		%	4.45		%	4.37		%

Lessee, Operating Lease, Liability, Maturity

As of December 31, 2022, aggregate undiscounted minimum lease payments and the reconciliation to our lease liability are as follows (in millions of dollars):

2023	$	18.2
2024	14.4
2025	11.1
2026	9.1
2027	8.3
2028 and Thereafter	17.4
Total	78.5
Less Imputed Interest	10.6
Lease Liability	$	67.9

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Statutory Financial Information (Tables)

12 Months Ended

Dec. 31, 2022

Statutory Financial Information [Abstract]

Statutory Permitted Practices Disclosure

Additional information regarding the Unum America premium deficiency reserve (PDR) is as follows:

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Premium Deficiency Reserve
Gross Premium Deficiency Reserve1	$	2,851.0	$	2,977.0	$	2,290.0
Cumulative Gross Premium Deficiency Reserve Recognized	1,191.0		667.0		229.0
Remaining Premium Deficiency Reserve to be Recognized	$	1,660.0	$	2,310.0	$	2,061.0
1The gross PDR decreased by $126.0 million due primarily to premium rate increase activity and underlying growth in the locked-in statutory reserve basis during 2022. The gross PDR increased by $687.0 million and $190.0 million during 2021 and 2020, respectively, due primarily to changes in the assumed reinvestment rate. The increase for 2020 was from the original $2,100.0 million reserve deficiency as of December 31, 2018.

Statutory Earnings and Surplus

The operating results and capital and surplus of our traditional U.S. life insurance subsidiaries and our captive reinsurers, prepared in accordance with prescribed or permitted accounting practices of the NAIC or states of domicile, are presented separately below.

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Combined Net Income (Loss)
Traditional U.S. Life Insurance Subsidiaries	$	965.4	$	779.5	$	646.8
Captive Reinsurers	$	(432.2)	$	(159.0)	$	(201.0)
Combined Net Gain (Loss) from Operations, After Tax
Traditional U.S. Life Insurance Subsidiaries	$	965.4	$	681.1	$	726.2
Captive Reinsurers	$	(428.6)	$	(247.4)	$	(149.4)

	December 31
	2022		2021
	(in millions of dollars)
Combined Capital and Surplus
Traditional U.S. Life Insurance Subsidiaries	$	3,816.3	$	3,950.3
Captive Reinsurers	$	1,229.6	$	1,258.4

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Schedule II Condensed Financial Information of Registrant (Tables) - Parent Company

12 Months Ended

Dec. 31, 2022

Condensed Financial Statements, Captions

Condensed Financial Information of Parent Company Only Balance Sheets

BALANCE SHEETS

	December 31
	2022		2021
	(in millions of dollars)
Assets
Fixed Maturity Securities - at fair value (amortized cost: $748.1; $826.4)	$	657.7	$	820.8
Other Long-term Investments	19.3		10.3
Short-term Investments	845.8		629.5
Investment in Subsidiaries	11,278.2		13,711.1
Deferred Income Tax	114.9		144.5
Other Assets	555.5		508.1
Total Assets	$	13,471.4	$	15,824.3
Liabilities and Stockholders' Equity
Liabilities
Short-term Debt	$	2.0	$	—
Long-term Debt	3,427.8		3,442.2
Pension and Postretirement Benefits	352.6		507.1
Other Liabilities	491.5		458.6
Total Liabilities	4,273.9		4,407.9
Stockholders' Equity
Common Stock, $0.10 par
Authorized: 725,000,000 shares
Issued: 308,306,490 and 307,334,853 shares	30.8		30.7
Additional Paid-in Capital	2,441.0		2,408.1
Accumulated Other Comprehensive Income (Loss)	(2,756.6)		354.1
Retained Earnings	12,912.1		11,853.2
Treasury Stock - at cost: 110,551,977 and 104,820,670 shares	(3,429.8)		(3,229.7)
Total Stockholders' Equity	9,197.5		11,416.4
Total Liabilities and Stockholders' Equity	$	13,471.4	$	15,824.3

Condensed Financial Information of Parent Company Only Statement of Earnings

STATEMENTS OF OPERATIONS

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Cash Dividends from Subsidiaries	$	1,306.6	$	909.8	$	974.6
Non-Cash Dividends from Subsidiaries	23.0		719.6		—
Other Income	81.8		53.5		51.7
Total Revenue	1,411.4		1,682.9		1,026.3
Interest and Debt Expense	188.5		185.9		187.1
Cost Related to Early Retirement of Debt	4.2		67.3		—
Other Expenses	35.6		39.1		51.1
Total Expenses	228.3		292.3		238.2
Income of Parent Company Before Income Tax	1,183.1		1,390.6		788.1
Income Tax Expense (Benefit)	14.7		(24.1)		(15.3)
Income of Parent Company	1,168.4		1,414.7		803.4
Equity in Undistributed Earnings (Loss) of Subsidiaries	145.8		(590.5)		(10.4)
Net Income	1,314.2		824.2		793.0
Other Comprehensive Income (Loss), Net of Tax	(3,110.7)		(20.1)		336.9
Comprehensive Income (Loss)	$	(1,796.5)	$	804.1	$	1,129.9

Condensed Financial Information of Parent Company Only Statements of Cash Flows

STATEMENTS OF CASH FLOWS

	Year Ended December 31
	2022		2021		2020
	(in millions of dollars)
Cash Provided by Operating Activities	$	1,250.2	$	861.0	$	964.0
Cash Flows from Investing Activities
Proceeds from Sales and Maturities of Fixed Maturity Securities	192.1		245.5		138.8
Proceeds from Sales and Maturities of Other Investments	7.4		20.1		46.6
Purchase of Fixed Maturity Securities	(102.7)		(2.0)		(384.7)
Purchase of Other Investments	(32.0)		(0.9)		(22.0)
Net Sales (Purchases) of Short-term Investments	(209.6)		(465.0)		440.6
Cash Distributions to Subsidiaries	(540.2)		(300.9)		(965.5)
Net Purchases of Property and Equipment	(94.0)		(91.3)		(81.6)
Cash Used by Investing Activities	(779.0)		(594.5)		(827.8)
Cash Flows from Financing Activities
Short-term Debt Repayment	—		—		(400.0)
Issuance of Long-term Debt	349.2		588.1		494.1
Long-term Debt Repayment	(364.0)		(500.0)		—
Cost Related to Early Retirement of Debt	(3.6)		(62.8)		—
Issuance of Common Stock	4.0		3.4		4.4
Repurchase of Common Stock	(200.1)		(50.0)		—
Dividends Paid to Stockholders	(254.2)		(239.4)		(231.9)
Other, Net	0.7		(1.6)		(1.4)
Cash Used by Financing Activities	(468.0)		(262.3)		(134.8)
Increase in Cash	$	3.2	$	4.2	$	1.4

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Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2022 USD ($) Integer $ / shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2020 USD ($) $ / shares	Jan. 01, 2021 USD ($)
New Accounting Pronouncements or Change in Accounting Principle
Number of Operating Segments | Integer	3
Premium Income	$ 9,623,400,000	$ 9,481,000,000	$ 9,378,100,000
Commissions	1,086,400,000	1,038,100,000	1,057,300,000
Ceded Policy Loans	3,312,500,000	3,373,700,000
Premium Receivable, Allowance for Credit Loss	32,500,000	34,200,000
Premiums Receivable, Gross	557,600,000	530,700,000
Premium Receivable, Credit Loss Expense (Reversal)	(1,700,000)	(4,600,000)
Accumulated Depreciation for Property and Equipment	1,328,700,000	1,259,600,000
Value of Business Acquired	62,900,000	73,100,000
Accumulated Amortization of Value of Business Acquired	150,300,000	157,700,000
Amortization of Value of Business Acquired	4,900,000	5,700,000	6,100,000
Prepaid Reinsurance Premiums	713,300,000	777,100,000
Deferred Gain on Reinsurance	3,100,000	3,700,000
Reinsurance Recoverable, Allowance for Credit Loss	1,700,000	2,300,000
Reinsurance Recoverable, Credit Loss Expense (Reversal)	(600,000)	(9,400,000)
Premium Tax Expense	169,300,000	166,000,000	175,500,000
Participation Fund Account Assets (PFA)	250,200,000	297,700,000
Net Income	$ 1,314,200,000	$ 824,200,000	$ 793,000,000.0
Diluted Earnings Per Share | $ / shares	$ 6.50	$ 4.02	$ 3.89
Accumulated Other Comprehensive Income (Loss)	$ (2,756,600,000)	$ 354,100,000
Basic Earnings Per Share | $ / shares	$ 6.55	$ 4.04	$ 3.89
Pro Forma | Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Accumulated Other Comprehensive Income (Loss)				$ 6,700,000,000
Minimum | Pro Forma | Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Net Income	$ 80,000,000	$ 145,000,000
Diluted Earnings Per Share | $ / shares	$ 0.40	$ 0.70
Accumulated Other Comprehensive Income (Loss)	$ 600,000,000	$ 5,400,000,000
Maximum | Pro Forma | Accounting Standards Update 2018-12 | Cumulative Effect, Period of Adoption, Adjustment
New Accounting Pronouncements or Change in Accounting Principle
Net Income	$ 110,000,000	$ 175,000,000
Diluted Earnings Per Share | $ / shares	$ 0.55	$ 0.85
Accumulated Other Comprehensive Income (Loss)	$ 800,000,000	$ 5,600,000,000
Change in Accounting Method Accounted for as Change in Estimate
New Accounting Pronouncements or Change in Accounting Principle
Premium Income	(13,400,000)
Commissions	(1,000,000.0)
Net Income	$ (9,800,000)
Diluted Earnings Per Share | $ / shares	$ 0.05
Basic Earnings Per Share | $ / shares	$ 0.05

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Fair Values of Financial Instruments Private Equity Partnerships (Details) - Private Equity Partnerships - USD ($) $ in Millions		Dec. 31, 2022	Dec. 31, 2021
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments		$ 1,194.3	$ 978.6
Alternative Investments, Unfunded Commitments		776.9	753.2
Private Credit
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments		275.0	279.4
Alternative Investments, Unfunded Commitments		104.3	150.5
Private Credit | Not Redeemable
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments	[1]	239.3	240.6
Alternative Investments, Unfunded Commitments		90.9	143.7
Private Credit | Initial 2 year lock on each new investment / Quarterly after 2 year lock with 90 days notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments		35.7	38.8
Alternative Investments, Unfunded Commitments		13.4	6.8
Private Equity Limited Partnership
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments		485.3	384.6
Alternative Investments, Unfunded Commitments		416.3	324.6
Private Equity Limited Partnership | Not Redeemable
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments	[2]	453.6	365.8
Alternative Investments, Unfunded Commitments		377.2	274.3
Private Equity Limited Partnership | Initial 5.5 year lock on each new investment / Quarterly after 5.5 year lock with 90 days notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments		31.7	18.8
Alternative Investments, Unfunded Commitments		39.1	50.3
Real Assets
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments		434.0	314.6
Alternative Investments, Unfunded Commitments		256.3	278.1
Real Assets | Not Redeemable
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments	[3]	373.9	256.2
Alternative Investments, Unfunded Commitments		256.3	278.1
Real Assets | Quarterly / 90 days notice
Fair Value, Investments, Entities that Calculate Net Asset Value Per Share
Alternative Investments		60.1	58.4
Alternative Investments, Unfunded Commitments		$ 0.0	$ 0.0

[1] Private Credit - The limited partnerships described in this category employ various investment strategies, generally providing direct lending or other forms of debt financing including first-lien, second-lien, mezzanine, and subordinated loans. The limited partnerships have credit exposure to corporates, physical assets, and/or financial assets within a variety of industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail) in North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 55 percent in the next 3 years, 34 percent during the period from 3 to 5 years, 9 percent during the period from 5 to 10 years, and 2 percent during the period from 10 to 15 years.

[2] Private Equity - The limited partnerships described in this category employ various strategies generally investing in controlling or minority control equity positions directly in companies and/or assets across various industries (including manufacturing, healthcare, energy, business services, technology, materials, and retail), primarily in private markets within North America and, to a lesser extent, outside of North America.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 35 percent in the next 3 years, 19 percent during the period from 3 to 5 years, 40 percent during the period from 5 to 10 years, and 6 percent during the period from 10 to 15 years.

[3] Real Assets - The limited partnerships described in this category employ various strategies, which include investing in the equity and/or debt financing of physical assets, including infrastructure (energy, power, water/wastewater, communications), transportation (including airports, ports, toll roads, aircraft, railcars) and real estate in North America, Europe, South America, and Asia.  As of December 31, 2022, the estimated remaining life of the investments that do not allow for redemptions is approximately 22 percent in the next 3 years, 28 percent during period from 3 to 5 years and 50 percent during the period from 5 to 10 years.

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Fair Value Measurements by Input Level (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Assets
Fixed Maturity Securities	$ 34,840.8	$ 43,336.0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets	$ 89.1	39.5
Equity Securities	25.8	33.7
Other Long-term Investments	1,440.1	1,203.0
Assets, Fair Value Disclosure	$ 36,150.0	44,387.8
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		65.1
Liabilities, Fair Value Disclosure	$ 87.9	65.1
Forwards
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Foreign Exchange Contracts
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		35.0
Embedded Derivative in Modified Coinsurance Arrangement
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		30.1
Fair Value, Measurements, Recurring
Assets
Other Long-term Investments	$ 1,309.2	1,051.8
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	$ 4,519.1	3,519.5
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		0.0
Equity Securities	$ 0.0	0.0
Other Long-term Investments	0.0	0.0
Assets, Fair Value Disclosure	4,519.1	3,519.5
Liabilities
Liabilities, Fair Value Disclosure	$ 0.0	0.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Forwards
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Foreign Exchange Contracts
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		0.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1 | Embedded Derivative in Modified Coinsurance Arrangement
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		0.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	$ 30,140.8	38,689.1
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		39.5
Equity Securities	$ 9.6	27.9
Other Long-term Investments	98.7	67.4
Assets, Fair Value Disclosure	30,239.5	38,756.5
Liabilities
Liabilities, Fair Value Disclosure	$ 74.0	35.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Forwards
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Foreign Exchange Contracts
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		35.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2 | Embedded Derivative in Modified Coinsurance Arrangement
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		0.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	$ 180.9	1,127.4
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		0.0
Equity Securities	$ 16.2	5.8
Other Long-term Investments	16.2	5.8
Assets, Fair Value Disclosure	197.1	1,133.2
Liabilities
Liabilities, Fair Value Disclosure	$ 13.9	30.1
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Forwards
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Foreign Exchange Contracts
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		0.0
Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3 | Embedded Derivative in Modified Coinsurance Arrangement
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		30.1
Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	$ 0.0	0.0
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		0.0
Equity Securities	$ 0.0	0.0
Other Long-term Investments	1,194.3	978.6
Assets, Fair Value Disclosure	1,194.3	978.6
Liabilities
Liabilities, Fair Value Disclosure	$ 0.0	0.0
Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share | Forwards
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share | Foreign Exchange Contracts
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		0.0
Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share | Embedded Derivative in Modified Coinsurance Arrangement
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		0.0
United States Government and Government Agencies and Authorities
Assets
Fixed Maturity Securities	$ 498.2	580.1
United States Government and Government Agencies and Authorities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	81.7	0.0
United States Government and Government Agencies and Authorities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	416.5	580.1
United States Government and Government Agencies and Authorities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	0.0	0.0
United States Government and Government Agencies and Authorities | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	0.0	0.0
States, Municipalities, and Political Subdivisions
Assets
Fixed Maturity Securities	3,457.2	4,727.5
States, Municipalities, and Political Subdivisions | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	8.7	0.0
States, Municipalities, and Political Subdivisions | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	3,448.3	4,714.1
States, Municipalities, and Political Subdivisions | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	0.2	13.4
States, Municipalities, and Political Subdivisions | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	0.0	0.0
Foreign Governments
Assets
Fixed Maturity Securities	827.1	1,146.6
Foreign Governments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	0.0	0.0
Foreign Governments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	827.1	1,125.8
Foreign Governments | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	0.0	20.8
Foreign Governments | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	0.0	0.0
Public Utilities
Assets
Fixed Maturity Securities	4,956.9	6,416.0
Public Utilities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	160.1	230.8
Public Utilities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	4,796.8	6,140.7
Public Utilities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	0.0	44.5
Public Utilities | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	0.0	0.0
Mortgage/Asset-backed Securities
Assets
Fixed Maturity Securities	573.3	638.3
Mortgage/Asset-backed Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	0.0	0.0
Mortgage/Asset-backed Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	551.3	451.1
Mortgage/Asset-backed Securities | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	22.0	187.2
Mortgage/Asset-backed Securities | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	0.0	0.0
All Other Corporate Bonds
Assets
Fixed Maturity Securities	24,524.6	29,823.4
All Other Corporate Bonds | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	4,268.6	3,288.7
All Other Corporate Bonds | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	20,097.3	25,673.2
All Other Corporate Bonds | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	158.7	861.5
All Other Corporate Bonds | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	0.0	0.0
Redeemable Preferred Stocks
Assets
Fixed Maturity Securities	3.5	4.1
Redeemable Preferred Stocks | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Fixed Maturity Securities	0.0	0.0
Redeemable Preferred Stocks | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Fixed Maturity Securities	3.5	4.1
Redeemable Preferred Stocks | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Fixed Maturity Securities	0.0	0.0
Redeemable Preferred Stocks | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Fixed Maturity Securities	$ 0.0	0.0
Forwards
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Forwards | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Forwards | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Forwards | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Forwards | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Foreign Exchange Contracts
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		39.5
Foreign Exchange Contracts | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		0.0
Foreign Exchange Contracts | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		39.5
Foreign Exchange Contracts | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		0.0
Foreign Exchange Contracts | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other Long-term Investments
Derivative Assets		0.0
Private Equity Partnerships
Assets
Alternative Investments	$ 1,194.3	978.6
Private Equity Partnerships | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Alternative Investments	0.0	0.0
Private Equity Partnerships | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Alternative Investments	0.0	0.0
Private Equity Partnerships | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Alternative Investments	0.0	0.0
Private Equity Partnerships | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Alternative Investments	$ 1,194.3	978.6
Derivatives | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 1
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		0.0
Derivatives | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 2
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		35.0
Derivatives | Fair Value, Measurements, Recurring | Fair Value, Inputs, Level 3
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		30.1
Derivatives | Fair Value, Measurements, Recurring | Fair Value Measured at Net Asset Value Per Share
Assets
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Other Liabilities
Liabilities
Derivative Liabilities		$ 0.0

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Changes in Assets and Liabilities Measured at Fair Value on a Recurring Basis using Significant Unobservable Inputs (Level 3) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Embedded Derivative in Modified Coinsurance Arrangement
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation
Derivatives Measured with Unobservable Inputs, Beginning Balance	$ (30.1)	$ (39.8)
Derivative Liability Gain (Loss) Included in Earnings	16.2	9.7
Derivative Liability Gain (Loss) Included in OCI	0.0	0.0
Derivative Purchases	0.0	0.0
Derivative Sales	0.0	0.0
Derivative Transfers Into Level 3	0.0	0.0
Derivative Transfers Out of Level 3	0.0	0.0
Derivatives Measured with Unobservable Inputs, Ending Balance	(13.9)	(30.1)
Fair Value, Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0.0	0.0
Fair Value, Net Derivative Asset (Liability), Recurring Basis, Still Held, Unrealized Gain (Loss)	16.2	9.7
States, Municipalities, and Political Subdivisions
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Assets Measured with Unobservable Inputs, Beginning Balance	13.4	15.5
Investment Gain (Loss) included in Earnings	0.0	0.0
Investment Gain (Loss) included in OCI	(0.1)	(2.1)
Investment Purchases	0.0	0.0
Investment Sales	0.0	0.0
Investment Level 3 Transfers Into	0.3	0.0
Investment Level 3 Transfers Out of	13.4	0.0
Assets Measured with Unobservable Inputs, Ending Balance	0.2	13.4
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0.1	2.1
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0.0	0.0
Foreign Governments
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Assets Measured with Unobservable Inputs, Beginning Balance	20.8	21.8
Investment Gain (Loss) included in Earnings	0.0	0.0
Investment Gain (Loss) included in OCI	(0.8)	(1.0)
Investment Purchases	0.0	0.0
Investment Sales	(20.0)	0.0
Investment Level 3 Transfers Into	0.0	0.0
Investment Level 3 Transfers Out of	0.0	0.0
Assets Measured with Unobservable Inputs, Ending Balance	0.0	20.8
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0.8	1.0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0.0	0.0
Public Utilities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Assets Measured with Unobservable Inputs, Beginning Balance	44.5	185.7
Investment Gain (Loss) included in Earnings	0.0	0.0
Investment Gain (Loss) included in OCI	(2.8)	(2.3)
Investment Purchases	0.0	0.0
Investment Sales	(12.8)	(44.0)
Investment Level 3 Transfers Into	15.6	36.0
Investment Level 3 Transfers Out of	44.5	130.9
Assets Measured with Unobservable Inputs, Ending Balance	0.0	44.5
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	2.8	2.3
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0.0	0.0
Mortgage/Asset-backed Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Assets Measured with Unobservable Inputs, Beginning Balance	187.2	81.3
Investment Gain (Loss) included in Earnings	0.0	0.0
Investment Gain (Loss) included in OCI	(0.3)	(96.0)
Investment Purchases	20.7	0.0
Investment Sales	(10.6)	(72.3)
Investment Level 3 Transfers Into	0.0	274.2
Investment Level 3 Transfers Out of	175.0	0.0
Assets Measured with Unobservable Inputs, Ending Balance	22.0	187.2
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0.3	96.0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0.0	0.0
All Other Corporate Bonds
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Assets Measured with Unobservable Inputs, Beginning Balance	861.5	943.1
Investment Gain (Loss) included in Earnings	0.0	0.0
Investment Gain (Loss) included in OCI	(32.0)	(24.6)
Investment Purchases	25.3	249.9
Investment Sales	(102.3)	(80.2)
Investment Level 3 Transfers Into	161.9	77.6
Investment Level 3 Transfers Out of	755.7	304.3
Assets Measured with Unobservable Inputs, Ending Balance	158.7	861.5
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	32.0	24.6
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0.0	0.0
Fixed Maturity Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Assets Measured with Unobservable Inputs, Beginning Balance	1,127.4	1,247.4
Investment Gain (Loss) included in Earnings	0.0	0.0
Investment Gain (Loss) included in OCI	(36.0)	(126.0)
Investment Purchases	46.0	249.9
Investment Sales	(145.7)	(196.5)
Investment Level 3 Transfers Into	177.8	387.8
Investment Level 3 Transfers Out of	988.6	435.2
Assets Measured with Unobservable Inputs, Ending Balance	180.9	1,127.4
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	36.0	126.0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	0.0	0.0
Perpetual Preferred Securities
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Assets Measured with Unobservable Inputs, Beginning Balance	5.8	4.7
Investment Gain (Loss) included in Earnings	3.0	0.1
Investment Gain (Loss) included in OCI	0.0	0.0
Investment Purchases	7.1	1.0
Investment Sales	0.0	0.0
Investment Level 3 Transfers Into	0.3	0.0
Investment Level 3 Transfers Out of	0.0	0.0
Assets Measured with Unobservable Inputs, Ending Balance	16.2	5.8
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss), OCI	0.0	0.0
Fair Value, Asset, Recurring Basis, Still Held, Unrealized Gain (Loss)	$ 3.0	$ 0.1

XML

Quantitative Information Regarding Significant Unobservable Inputs (Details) $ in Millions		Dec. 31, 2022 USD ($) Rate	Dec. 31, 2021 USD ($) Rate
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities | $		$ 25.8	$ 33.7
Fair Value, Inputs, Level 3 | Discounted Cash Flow | Embedded Derivative in Modified Coinsurance Arrangement
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative in Modified Coinsurance Arrangement | $	[1]	$ (13.9)	$ (30.1)
Fair Value, Inputs, Level 3 | Discounted Cash Flow | Embedded Derivative in Modified Coinsurance Arrangement | Weighted Average | Input Measurement, Spread of Swap Curve
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Embedded Derivative Liability, Measurement Input		0.006	0.007
Fair Value, Inputs, Level 3 | All Other Corporate Bonds | Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
All Other Corporate Bonds - Private | $	[2]	$ 15.3	$ 111.8	[3],[4]
Fair Value, Inputs, Level 3 | All Other Corporate Bonds | Market Approach | Minimum | Volatility of Credit
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
All Other Corporate Bonds - Private, Measurement Input		0.0541	0.0630
Fair Value, Inputs, Level 3 | All Other Corporate Bonds | Market Approach | Minimum | Lack of Marketability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
All Other Corporate Bonds - Private, Measurement Input			0.0014
Fair Value, Inputs, Level 3 | All Other Corporate Bonds | Market Approach | Maximum | Volatility of Credit
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
All Other Corporate Bonds - Private, Measurement Input		0.0541	0.0630
Fair Value, Inputs, Level 3 | All Other Corporate Bonds | Market Approach | Maximum | Lack of Marketability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
All Other Corporate Bonds - Private, Measurement Input			0.0073
Fair Value, Inputs, Level 3 | All Other Corporate Bonds | Market Approach | Weighted Average | Volatility of Credit
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
All Other Corporate Bonds - Private, Measurement Input		0.0541	0.0630
Fair Value, Inputs, Level 3 | All Other Corporate Bonds | Market Approach | Weighted Average | Lack of Marketability
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
All Other Corporate Bonds - Private, Measurement Input			0.0051
Fair Value, Inputs, Level 3 | Perpetual Preferred Securities | Market Approach
Fair Value Measurement Inputs and Valuation Techniques [Line Items]
Equity Securities | $	[4]	$ 16.2	$ 5.8

[1] (d)Represents various actuarial assumptions required to derive the liability cash flows. Fair value of embedded derivative is most often driven by the change in the weighted average credit spread to the swap curve for the assets backing the hypothetical loan

[2] Represents a decision to price based on par value, cost, owner's equity, or the price of the most recent capital funding round when limited data is available

[3] Represents basis point adjustments for credit-specific factors

[4] Represents basis point adjustments to apply a discount due to the illiquidity of an investment

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Fair Values of Financial Instruments Carrying Amounts and Estimated Fair value of Financial Instruments Not Measured at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage Loans	$ 2,435.4	$ 2,560.4
Policy Loans	3,601.2	3,662.9
Long-term Debt	3,427.8	3,442.2
Unfunded Commitments	0.7
Liabilities, Fair Value Disclosure	87.9	65.1
Fair Value, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage Loans, Fair Value Disclosure	2,159.5	2,677.8
Mortgage Loans	2,435.4	2,560.4
Policy Loans, Fair Value Disclosure	3,677.0	3,807.1
Policy Loans	3,601.2	3,662.9
Miscellaneous Long-Term Investments, Fair Value Disclosure	18.4	31.6
Miscellaneous Long-Term Investments	18.4	31.6
Financial Instruments, Financial Assets Fair Value Disclosure	5,854.9	6,516.5
Total Financial Instrument Assets Not Carried at Fair Value	6,055.0	6,254.9
Long-term Debt, Fair Value Disclosure	3,072.0	3,879.1
Long-term Debt	3,427.8	3,442.2
Unfunded Commitments	0.7	0.7
Federal Home Loan Bank Funding Agreements, Fair Value Disclosure	99.1	160.9
Federal Home Loan Bank Funding Agreements	99.1	160.9
Liabilities, Fair Value Disclosure	3,171.8	4,040.7
Total Financial Instrument Liabilities Not Carried at Fair Value	3,527.6	3,603.8
Fair Value, Inputs, Level 1 | Fair Value, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage Loans, Fair Value Disclosure	0.0	0.0
Policy Loans, Fair Value Disclosure	0.0	0.0
Miscellaneous Long-Term Investments, Fair Value Disclosure	0.0	0.0
Financial Instruments, Financial Assets Fair Value Disclosure	0.0	0.0
Long-term Debt, Fair Value Disclosure	2,288.9	2,237.3
Unfunded Commitments	0.0	0.0
Federal Home Loan Bank Funding Agreements, Fair Value Disclosure	0.0	0.0
Liabilities, Fair Value Disclosure	2,288.9	2,237.3
Fair Value, Inputs, Level 2 | Fair Value, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage Loans, Fair Value Disclosure	2,159.5	2,677.8
Policy Loans, Fair Value Disclosure	0.0	0.0
Miscellaneous Long-Term Investments, Fair Value Disclosure	17.1	22.1
Financial Instruments, Financial Assets Fair Value Disclosure	2,176.6	2,699.9
Long-term Debt, Fair Value Disclosure	783.1	1,641.8
Unfunded Commitments	0.7	0.7
Federal Home Loan Bank Funding Agreements, Fair Value Disclosure	99.1	160.9
Liabilities, Fair Value Disclosure	882.9	1,803.4
Fair Value, Inputs, Level 3 | Fair Value, Nonrecurring
Fair Value, Balance Sheet Grouping, Financial Statement Captions
Mortgage Loans, Fair Value Disclosure	0.0	0.0
Policy Loans, Fair Value Disclosure	3,677.0	3,807.1
Miscellaneous Long-Term Investments, Fair Value Disclosure	1.3	9.5
Financial Instruments, Financial Assets Fair Value Disclosure	3,678.3	3,816.6
Long-term Debt, Fair Value Disclosure	0.0	0.0
Unfunded Commitments	0.0	0.0
Federal Home Loan Bank Funding Agreements, Fair Value Disclosure	0.0	0.0
Liabilities, Fair Value Disclosure	$ 0.0	$ 0.0

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Fair Value of Financial Instruments Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Ceded Policy Loans	$ 3,312.5	$ 3,373.7
Fair Value, Inputs, Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Percentage of Total Fair Value of Fixed Maturities Securities	13.00%
Fair Value, Inputs, Level 2 | Pricing Service
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Percentage of Total Fair Value of Fixed Maturities Securities	71.00%
Fair Value, Inputs, Level 2 | Other Observable Market Data
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Percentage of Total Fair Value of Fixed Maturities Securities	15.10%
Fair Value Inputs Other Than Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Percentage of Total Fair Value of Fixed Maturities Securities	87.00%
Fair Value Inputs Level 2 Or Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis
Percentage of Total Fair Value of Fixed Maturities Securities	0.90%

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Amortized Cost and Fair Values of Securities by Security Type (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2020
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	$ 37,825.2	$ 37,386.7
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	743.6
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,728.0
Debt Securities, Available-for-sale, Total	34,840.8	43,336.0
United States Government and Government Agencies and Authorities
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	503.8	460.1
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	20.3	120.1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	25.9	0.1
Debt Securities, Available-for-sale, Total	498.2	580.1
States, Municipalities, and Political Subdivisions
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	4,006.0	4,150.2
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	87.1	584.2
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	635.9	6.9
Debt Securities, Available-for-sale, Total	3,457.2	4,727.5
Foreign Governments
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	908.1	952.0
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	34.9	215.3
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	115.9	20.7
Debt Securities, Available-for-sale, Total	827.1	1,146.6
Public Utilities
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	5,170.9	5,266.4
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	141.0	1,159.4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	355.0	9.8
Debt Securities, Available-for-sale, Total	4,956.9	6,416.0
Mortgage/Asset-backed Securities
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	592.1	587.9
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	8.2	50.4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	27.0	0.0
Debt Securities, Available-for-sale, Total	573.3	638.3
All Other Corporate Bonds
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	26,640.3	25,966.1
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0	$ 6.8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	452.1	3,919.9
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	2,567.8	62.6
Debt Securities, Available-for-sale, Total	24,524.6	29,823.4
Redeemable Preferred Stocks
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	4.0	4.0
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	0.0	0.1
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	0.5	0.0
Debt Securities, Available-for-sale, Total	3.5	4.1
Fixed Maturity Securities
Debt Securities, Available-for-sale
Amortized Cost of Fixed Maturity Securities	37,825.2	37,386.7
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	743.6	6,049.4
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	3,728.0	100.1
Debt Securities, Available-for-sale, Total	$ 34,840.8	$ 43,336.0

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Length of Time Fixed Maturity Securities had been in a Gross Unrealized Loss Position (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
United States Government and Government Agencies and Authorities
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	$ 246.6	$ 9.3
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	22.6	0.1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	12.2	0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	3.3	0.0
States, Municipalities, and Political Subdivisions
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	1,920.1	326.4
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	476.1	6.9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	346.6	0.4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	159.8	0.0
Foreign Governments
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	160.1	234.4
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	47.9	18.9
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	176.9	10.7
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	68.0	1.8
Public Utilities
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	2,242.2	263.3
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	252.0	9.1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	255.2	17.6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	103.0	0.7
Mortgage/Asset-backed Securities
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	386.6	29.2
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	27.0	0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0.1	0.1
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0.0	0.0
All Other Corporate Bonds
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	15,865.6	2,146.3
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	1,799.7	51.6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,194.1	199.4
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	768.1	11.0
Redeemable Preferred Stocks
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	3.5
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	0.5
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	0.0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	0.0
Fixed Maturity Securities
Debt Securities, Available-for-sale, Unrealized Loss Position
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months	20,824.7	3,008.9
Debt Securities, Available-for-Sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss	2,625.8	86.6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer	2,985.1	228.2
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss	$ 1,102.2	$ 13.5

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Investments Distribution of the Maturity Dates for Fixed Maturity Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses, Fiscal Year Maturity [Abstract]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Amortized Cost	$ 1,133.5	$ 767.3
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year One Through Five, Net	7,090.8	6,613.2
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 5 Through 10, Net	10,096.7	10,614.3
Debt Securities, Available-for-Sale, Amortized Cost, Maturity, Allocated and Single Maturity Date, after Year 10, Net	18,912.1	18,804.0
Available for sale Securities Debt Maturities Amortized Cost Gross Subtotal, Net	37,233.1	36,798.8
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Amortized Cost, Net	592.1	587.9
Debt Securities, Available-for-sale, Amortized Cost, Net of Allowance for Credit Losses	37,825.2	37,386.7
Available for Sale Securities Unrealized Gain Position Gross Gain [Abstract]
Available For Sale Securities Debt Maturities Within One Year Unrealized Gain Position Gross Gain	2.9	17.6
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Gain Position Gross Gain	86.7	540.2
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Gain Position Gross Gain	294.8	1,453.3
Available For Sale Securities Debt Maturities After Ten Years Unrealized Gain Position Gross Gain	351.0	3,987.9
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Gain Gross Subtotal	735.4	5,999.0
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Gain Position Gross Gain	8.2	50.4
Available for sale Securities, Debt Maturities Unrealized Gain Position Gross Gain	743.6	6,049.4
Available for Sale Securities Unrealized Loss Position Gross Loss [Abstract]
Available For Sale Securities Debt Maturities Within One Year Unrealized Loss Position Gross Loss	5.7	0.1
Available For Sale Securities Debt Maturities After One Through Five Years Unrealized Loss Position Gross Loss	238.4	6.0
Available For Sale Securities Debt Maturities After Five Through Ten Years Unrealized Loss Position Gross Loss	863.8	26.0
Available For Sale Securities Debt Maturities After Ten Years Unrealized Loss Position Gross Loss	2,593.1	68.0
Available For Sale Securities Debt Maturities Unrealized Gain Position Gross Loss Gross Subtotal	3,701.0	100.1
Available For Sale Securities Debt Maturities Without Single Maturity Date Unrealized Loss Position Gross Loss	27.0	0.0
Available For Sale Securities Unrealized Loss Position Gross Loss Subtotal	3,728.0	100.1
Fair Value Maturity Distribution [Abstract]
Debt Securities, Available-for-sale, Total	34,840.8	43,336.0
Available for Sale Securities Unrealized Gain Position Fair Value
Fair Value Maturity Distribution [Abstract]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	339.1	756.0
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	1,953.2	7,050.5
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	3,538.9	10,905.0
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	5,013.2	20,778.4
Available for sale Securities Debt Maturities Fair Value Gross Subtotal	10,844.4	39,489.9
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	186.6	609.0
Debt Securities, Available-for-sale, Total	11,031.0	40,098.9
Available for Sale Securities Unrealized Loss Position Fair Value
Fair Value Maturity Distribution [Abstract]
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, within One Year, Fair Value	791.6	28.9
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after One Through Five Years, Fair Value	4,985.9	96.9
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after Five Through Ten Years, Fair Value	5,988.8	1,136.6
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, after 10 Years, Fair Value	11,656.8	1,945.4
Available for sale Securities Debt Maturities Fair Value Gross Subtotal	23,423.1	3,207.8
Debt Securities, Available-for-sale, Maturity, without Single Maturity Date, Fair Value	386.7	29.3
Debt Securities, Available-for-sale, Total	$ 23,809.8	$ 3,237.1

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Investments Distribution by External Credit Rating for Fixed Maturity Securities (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Securities, Available-for-sale
Fixed Maturity Securities	$ 34,840.8	$ 43,336.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	743.6
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 3,728.0
Fixed maturity securities in unrealized loss position percent of total	100.00%
External Credit Rating, Investment Grade
Debt Securities, Available-for-sale
Fixed Maturity Securities	$ 32,851.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	734.6
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 3,545.5
Fixed maturity securities in unrealized loss position percent of total	95.10%
External Credit Rating, Below-Investment-Grade
Debt Securities, Available-for-sale
Fixed Maturity Securities	$ 1,989.8
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	9.0
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	$ 182.5
Fixed maturity securities in unrealized loss position percent of total	4.90%

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Debt Securities, Available-for-sale, Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Jan. 01, 2020
Debt Securities, Available-for-sale, Allowance for Credit Loss
Debt Securities, Available-for-sale, Allowance for Credit Loss	$ 0.0	$ 0.0
All Other Corporate Bonds
Debt Securities, Available-for-sale, Allowance for Credit Loss
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	0.0	$ 6.8
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded		0.0
Change in allowance due to change in intent to hold securities to maturity		0.5
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	(7.3)
Public Utilities
Debt Securities, Available-for-sale, Allowance for Credit Loss
Debt Securities, Available-for-sale, Allowance for Credit Loss	0.0	$ 0.0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Not Previously Recorded	4.6
Change in allowance due to change in intent to hold securities to maturity	0.0
Debt Securities, Available-for-sale, Allowance for Credit Loss, Securities Sold	$ (4.6)

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Investments Low Income Housing Tax Credits (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Low Income Housing Tax Credits [Abstract]
Affordable Housing Tax Credits	$ 8.0	$ 21.6	$ 33.2
Amortization of Affordable Housing Tax Credit Investments	(5.9)	(15.0)	(21.9)
Tax Benefits from Low Income Housing Investments	$ 2.1	$ 6.6	$ 11.3

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Mortgage Loans by Property Type and Geographic Region (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Mortgage Loans on Real Estate
Mortgage Loans	$ 2,435.4	$ 2,560.4
Percent of Total	100.00%	100.00%
New England
Mortgage Loans on Real Estate
Mortgage Loans	$ 52.4	$ 54.9
Percent of Total	2.20%	2.10%
Mid-Atlantic
Mortgage Loans on Real Estate
Mortgage Loans	$ 192.4	$ 214.7
Percent of Total	7.90%	8.40%
East North Central
Mortgage Loans on Real Estate
Mortgage Loans	$ 313.0	$ 298.4
Percent of Total	12.90%	11.70%
West North Central
Mortgage Loans on Real Estate
Mortgage Loans	$ 181.4	$ 193.1
Percent of Total	7.40%	7.50%
South Atlantic
Mortgage Loans on Real Estate
Mortgage Loans	$ 539.3	$ 582.1
Percent of Total	22.10%	22.70%
East South Central
Mortgage Loans on Real Estate
Mortgage Loans	$ 101.8	$ 120.7
Percent of Total	4.20%	4.70%
West South Central
Mortgage Loans on Real Estate
Mortgage Loans	$ 212.6	$ 243.2
Percent of Total	8.70%	9.60%
Mountain
Mortgage Loans on Real Estate
Mortgage Loans	$ 298.7	$ 290.6
Percent of Total	12.30%	11.30%
Pacific
Mortgage Loans on Real Estate
Mortgage Loans	$ 543.8	$ 562.7
Percent of Total	22.30%	22.00%
Apartment
Mortgage Loans on Real Estate
Mortgage Loans	$ 688.6	$ 780.0
Percent of Total	28.30%	30.50%
Industrial
Mortgage Loans on Real Estate
Mortgage Loans	$ 745.3	$ 734.4
Percent of Total	30.60%	28.70%
Office
Mortgage Loans on Real Estate
Mortgage Loans	$ 423.0	$ 467.2
Percent of Total	17.40%	18.20%
Retail
Mortgage Loans on Real Estate
Mortgage Loans	$ 534.5	$ 533.3
Percent of Total	21.90%	20.80%
Other Property
Mortgage Loans on Real Estate
Mortgage Loans	$ 44.0	$ 45.5
Percent of Total	1.80%	1.80%

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Schedule of Participating Mortgage Loans by Internal Credit Rating and Loan to Value (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Mortgage Loans on Real Estate
Mortgage Loans	$ 2,435.4	$ 2,560.4
Percent of Total	100.00%	100.00%
Loan to Value Ratio Below or Equal to 65 Percent
Mortgage Loans on Real Estate
Mortgage Loans	$ 1,389.6	$ 1,346.1
Percent of Total	57.00%	52.60%
Loan To Value Ratio Above 65 To 75 Percent
Mortgage Loans on Real Estate
Mortgage Loans	$ 937.2	$ 1,076.8
Percent of Total	38.50%	42.00%
Loan To Value Ratio Above 75 To 85 Percent
Mortgage Loans on Real Estate
Mortgage Loans	$ 75.0	$ 114.9
Percent of Total	3.10%	4.50%
Loan To Value Ratio Above 85 Percent
Mortgage Loans on Real Estate
Mortgage Loans	$ 33.6	$ 22.6
Percent of Total	1.40%	0.90%
Total
Mortgage Loans on Real Estate
Percent of Total	100.00%	100.00%
AA Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans	$ 92.3	$ 27.3
Percent of Total	3.80%	1.10%
A Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans	$ 843.9	$ 709.6
Percent of Total	34.60%	27.70%
BBB Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans	$ 1,458.0	$ 1,802.6
Percent of Total	59.90%	70.40%
BB Credit Rating
Mortgage Loans on Real Estate
Mortgage Loans	$ 41.2	$ 20.9
Percent of Total	1.70%	0.80%
Total
Mortgage Loans on Real Estate
Percent of Total	100.00%	100.00%

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Mortgage Loans Sorted by Applicable Credit Quality Indicators (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Financing Receivable, Credit Quality Indicator
Financing Receivable, Allowance for Credit Loss	$ (9.3)
Mortgage Loans	2,435.4	$ 2,560.4
Loan to Value Ratio Below or Equal to 65 Percent
Financing Receivable, Credit Quality Indicator
Mortgage Loans	1,389.6	1,346.1
Loan To Value Ratio Above 65 To 75 Percent
Financing Receivable, Credit Quality Indicator
Mortgage Loans	937.2	1,076.8
Loan To Value Ratio Above 75 To 85 Percent
Financing Receivable, Credit Quality Indicator
Mortgage Loans	75.0	114.9
Loan To Value Ratio Above 85 Percent
Financing Receivable, Credit Quality Indicator
Mortgage Loans	33.6	22.6
Originated Five or More Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Mortgage Loans	1,104.2	981.5
Originated Four Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Mortgage Loans	374.7	304.1
Originated Three Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Mortgage Loans	343.5	383.0
Originated Two Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Mortgage Loans	169.3	359.4
Originated in Fiscal Year before Latest Fiscal Year
Financing Receivable, Credit Quality Indicator
Mortgage Loans	355.6	180.0
Originated in Current Fiscal Year
Financing Receivable, Credit Quality Indicator
Mortgage Loans	88.1	352.4
AA Credit Rating
Financing Receivable, Credit Quality Indicator
Mortgage Loans	92.3	27.3
A Credit Rating
Financing Receivable, Credit Quality Indicator
Mortgage Loans	843.9	709.6
BBB Credit Rating
Financing Receivable, Credit Quality Indicator
Mortgage Loans	1,458.0	1,802.6
BB Credit Rating
Financing Receivable, Credit Quality Indicator
Mortgage Loans	41.2	20.9
Commercial Real Estate
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	1,108.5	984.1
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	376.5	305.5
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	344.8	384.4
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	169.9	360.8
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	356.4	180.7
Financing Receivable, Year One, Originated, Current Fiscal Year	88.6	353.2
Financing Receivable, before Allowance for Credit Loss	2,444.7	2,568.7
Financing Receivable, Allowance for Credit Loss	(9.3)	(8.3)
Commercial Real Estate | Loan to Value Ratio Below or Equal to 65 Percent
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	782.6	779.1
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	189.0	146.9
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	193.9	163.0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	81.3	80.7
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	128.9	54.3
Financing Receivable, Year One, Originated, Current Fiscal Year	16.9	124.7
Financing Receivable, before Allowance for Credit Loss	1,392.6	1,348.7
Financing Receivable, Allowance for Credit Loss	(3.0)	(2.6)	$ (3.4)
Commercial Real Estate | Loan To Value Ratio Above 65 To 75 Percent
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	230.2	115.7
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	181.6	115.4
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	150.9	215.4
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	80.1	280.1
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	227.5	126.4
Financing Receivable, Year One, Originated, Current Fiscal Year	71.7	228.5
Financing Receivable, before Allowance for Credit Loss	942.0	1,081.5
Financing Receivable, Allowance for Credit Loss	(4.7)	(4.7)	(7.3)
Commercial Real Estate | Loan To Value Ratio Above 75 To 85 Percent
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	67.5	89.3
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	0.0	26.3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0.0	0.0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	8.5	0.0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0.0	0.0
Financing Receivable, Year One, Originated, Current Fiscal Year	0.0	0.0
Financing Receivable, before Allowance for Credit Loss	76.0	115.6
Financing Receivable, Allowance for Credit Loss	(1.1)	(0.7)	(1.3)
Commercial Real Estate | Loan To Value Ratio Above 85 Percent
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	28.2	0.0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5.9	16.9
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0.0	6.0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0.0	0.0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0.0	0.0
Financing Receivable, Year One, Originated, Current Fiscal Year	0.0	0.0
Financing Receivable, before Allowance for Credit Loss	34.1	22.9
Financing Receivable, Allowance for Credit Loss	(0.5)	(0.3)	$ (1.1)
Commercial Real Estate | Originated Five or More Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Financing Receivable, Allowance for Credit Loss	(4.3)	(2.6)
Commercial Real Estate | Originated Four Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Financing Receivable, Allowance for Credit Loss	(1.8)	(1.4)
Commercial Real Estate | Originated Three Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Financing Receivable, Allowance for Credit Loss	(1.3)	(1.4)
Commercial Real Estate | Originated Two Years before Last Fiscal Year
Financing Receivable, Credit Quality Indicator
Financing Receivable, Allowance for Credit Loss	(0.6)	(1.4)
Commercial Real Estate | Originated in Fiscal Year before Latest Fiscal Year
Financing Receivable, Credit Quality Indicator
Financing Receivable, Allowance for Credit Loss	(0.8)	(0.7)
Commercial Real Estate | Originated in Current Fiscal Year
Financing Receivable, Credit Quality Indicator
Financing Receivable, Allowance for Credit Loss	(0.5)	(0.8)
Commercial Real Estate | AA Credit Rating
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	53.8	3.3
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	27.5	0.0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	11.1	24.0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0.0	0.0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0.0	0.0
Financing Receivable, Year One, Originated, Current Fiscal Year	0.0	0.0
Financing Receivable, before Allowance for Credit Loss	92.4	27.3
Commercial Real Estate | A Credit Rating
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	485.0	414.6
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	123.3	68.0
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	96.8	71.1
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	35.9	28.9
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	80.6	17.6
Financing Receivable, Year One, Originated, Current Fiscal Year	24.0	110.6
Financing Receivable, before Allowance for Credit Loss	845.6	710.8
Commercial Real Estate | BBB Credit Rating
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	534.0	561.2
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	219.8	227.3
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	236.9	283.3
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	134.0	331.9
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	275.8	163.1
Financing Receivable, Year One, Originated, Current Fiscal Year	64.6	242.6
Financing Receivable, before Allowance for Credit Loss	1,465.1	1,809.4
Commercial Real Estate | BB Credit Rating
Financing Receivable, Credit Quality Indicator
Financing Receivable, Originated, More than Five Years before Current Fiscal Year	35.7	5.0
Financing Receivable, Year Five, Originated, Four Years before Current Fiscal Year	5.9	10.2
Financing Receivable, Year Four, Originated, Three Years before Current Fiscal Year	0.0	6.0
Financing Receivable, Year Three, Originated, Two Years before Current Fiscal Year	0.0	0.0
Financing Receivable, Year Two, Originated, Fiscal Year before Current Fiscal Year	0.0	0.0
Financing Receivable, Year One, Originated, Current Fiscal Year	0.0	0.0
Financing Receivable, before Allowance for Credit Loss	$ 41.6	$ 21.2

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Mortgage Loans, Allowance for Credit Losses Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ 9.3
Commercial Real Estate
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Beginning Balance	8.3
Financing Receivable, Allowance for Credit Loss, Ending Balance	9.3	$ 8.3
Commercial Real Estate | Loan to Value Ratio Below or Equal to 65 Percent
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Beginning Balance	2.6	3.4
Financing Receivable, Credit Loss, Expense (Reversal)	0.4	(0.8)
Financing Receivable, Allowance for Credit Loss, Writeoff	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Recovery	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance	3.0	2.6
Commercial Real Estate | Loan To Value Ratio Above 65 To 75 Percent
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Beginning Balance	4.7	7.3
Financing Receivable, Credit Loss, Expense (Reversal)	0.0	(2.6)
Financing Receivable, Allowance for Credit Loss, Writeoff	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Recovery	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance	4.7	4.7
Commercial Real Estate | Loan To Value Ratio Above 75 To 85 Percent
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Beginning Balance	0.7	1.3
Financing Receivable, Credit Loss, Expense (Reversal)	0.4	(0.6)
Financing Receivable, Allowance for Credit Loss, Writeoff	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Recovery	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance	1.1	0.7
Commercial Real Estate | Loan To Value Ratio Above 85 Percent
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Beginning Balance	0.3	1.1
Financing Receivable, Credit Loss, Expense (Reversal)	0.2	(0.8)
Financing Receivable, Allowance for Credit Loss, Writeoff	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Recovery	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance	0.5	0.3
Commercial Real Estate | Loan to Value Ratio Total
Financing Receivable, Allowance for Credit Loss
Financing Receivable, Allowance for Credit Loss, Beginning Balance	8.3	13.1
Financing Receivable, Credit Loss, Expense (Reversal)	1.0	(4.8)
Financing Receivable, Allowance for Credit Loss, Writeoff	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Recovery	0.0	0.0
Financing Receivable, Allowance for Credit Loss, Ending Balance	$ 9.3	$ 8.3

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Investments Remaining Contractual Maturity of Security Lending Agreements (Details) - Overnight and Continuous - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Transfer of Certain Financial Assets Accounted for as Secured Borrowings
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	$ 88.5	$ 94.8
Securities Loaned and Securities Sold under Agreement to Repurchase, Gross Including Not Subject to Master Netting Arrangement	88.5	94.8
Secured Borrowings, Gross, Difference, Amount	0.0	0.0
United States Government and Government Agencies and Authorities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0.3	0.1
States, Municipalities, and Political Subdivisions
Transfer of Certain Financial Assets Accounted for as Secured Borrowings
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	0.0	0.1
Public Utilities
Transfer of Certain Financial Assets Accounted for as Secured Borrowings
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	6.3	3.1
All Other Corporate Bonds
Transfer of Certain Financial Assets Accounted for as Secured Borrowings
Securities Loaned, Including Not Subject to Master Netting Arrangement and Assets other than Securities Transferred	$ 81.9	$ 91.5

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Investments Federal Home Loan Bank Carrying Amount, Collateral Posted and Advances Received (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances
Federal Home Loan Bank Common Stock	$ 17.1	$ 22.1
Federal Home Loan Bank, Advances	99.1	160.9
Federal Home Loan Bank, Collateral Posted to FHLB	1,329.0	1,716.1
Fixed Maturity Securities
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances
Federal Home Loan Bank, Collateral Posted to FHLB	527.1	786.1
Commercial Mortgage Loans
Federal Home Loan Bank Carrying Value of Common Stock, Collateral Posted and Advances
Federal Home Loan Bank, Collateral Posted to FHLB	$ 801.9	$ 930.0

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Investments Schedule of Financial Instrument and Derivative Offsetting (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Offsetting Derivative Assets
Derivative Asset, Fair Value, Gross Asset	$ 89.1	$ 39.5
Derivative Liabilities Offsetting Derivative Assets in Balance Sheet	0.0	0.0
Net Derivative Assets Reported in Balance Sheet	89.1	39.5
Securities Received as Collateral on Derivative Assets	(38.0)	(9.8)
Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash Not Offset	(49.4)	(28.4)
Derivative Assets Net of Collateral	1.7	1.3
Offsetting Securities Borrowed
Securities Received as Collateral on Securities Borrowed	(88.5)	(94.8)
Cash Received as Collateral on Securities Borrowed	0.0	0.0
Offsetting Financial Assets
Gross Financial Assets	241.5	323.2
Financial Liabilities Offsetting Financial Assets in Balance Sheet	0.0	0.0
Net Financial Assets Reported in Balance Sheet	241.5	323.2
Securities Received as Collateral on Financial Assets	(101.9)	(198.7)
Cash Received as Collateral on Financial Assets	(137.9)	(123.2)
Financial Assets Net of Collateral	1.7	1.3
Offsetting Derivative Liabilities
Net Derivative Liabilities Reported in Balance Sheet		65.1
Offsetting Securities Loaned
Gross Securities Loaned	(152.4)	(283.7)
Assets Offsetting Securities Loaned in Balance Sheet	0.0	0.0
Securities Loaned	(152.4)	(283.7)
Securities Given as Collateral on Securities Loaned	(63.9)	(188.9)
Cash Given as Collateral on Securities Loaned	(88.5)	(94.8)
Securities Loaned Net of Collateral	0.0	0.0
Offsetting Financial Liabilities
Gross Financial Liability	162.5	129.8
Financial Assets Offsetting Financial Liabilities in Balance Sheet	0.0	0.0
Net Financial Liabilities Reported in Balance Sheet	162.5	129.8
Securities Given as Collateral on Financial Liabilities	(161.7)	(128.8)
Cash Given as Collateral on Financial Liabilities	0.0	0.0
Financial Liabilities Net of Collateral	0.8	1.0
Security Borrowed, Subject to Master Netting Arrangement, before Offset	88.5	94.8
Security Borrowed, Subject to Master Netting Arrangement, Liability Offset	0.0	0.0
Securities Borrowed	88.5	94.8
Security Borrowed, Including Not Subject to Master Netting Arrangement, after Offset and Deduction	0.0	0.0
Miscellaneous Long-term Investments
Offsetting Derivative Assets
Derivative Asset, Fair Value, Gross Asset	89.1	39.5
Over the Counter
Offsetting Derivative Liabilities
Gross Derivative Liability	74.0	35.0
Derivative Assets Offsetting Derivative Liabilities in Balance Sheet	0.0	0.0
Net Derivative Liabilities Reported in Balance Sheet	74.0	35.0
FMS Collateral Posted to Counterparties	(73.2)	(34.0)
Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset	0.0	0.0
Derivative Liabilities Net of Collateral	$ 0.8	$ 1.0

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Investments Investment Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Net Investment Income
Investment Income, Interest and Dividend	$ 2,173.6		$ 2,260.6		$ 2,403.7
Less Investment Expenses	39.4		35.1		30.6
Less Investment Income on PFA Assets	12.0		12.3		12.4
Net Investment Income	2,122.2		2,213.2		2,360.7
Fixed Maturity Securities
Net Investment Income
Investment Income, Interest and Dividend	1,849.8		1,888.2		2,164.0
Derivatives
Net Investment Income
Investment Income, Interest and Dividend	57.8		68.6		78.7
Mortgage Loans
Net Investment Income
Investment Income, Interest and Dividend	101.5		105.0		108.9
Policy Loans
Net Investment Income
Investment Income, Interest and Dividend	20.0		19.7		20.0
Perpetual Preferred Securities
Net Investment Income
Investment Income, Interest and Dividend	5.0	[1]	6.9	[1]	(2.1)
Private Equity Partnerships
Net Investment Income
Investment Income, Interest and Dividend	110.1		165.4		19.8
Other Long-term Investments
Net Investment Income
Investment Income, Interest and Dividend	9.4		5.5		3.9
Short-term Investments
Net Investment Income
Investment Income, Interest and Dividend	$ 20.0		$ 1.3		$ 10.5

[1] The net unrealized gain (loss) recognized in net investment income for the year ended December 31, 2022 related to perpetual preferred securities still held at December 31, 2022 was $2.8 million. The net unrealized gain (loss) recognized in net investment income for the years ended December 31, 2021 and 2020 related to perpetual preferred securities still held at year-end was $4.4 million and $(4.6) million, respectively

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Investment Gains and Losses Reported in Consolidated Statements of Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Fixed Maturity Securities
Debt Securities, Available-for-sale, Realized Gain	$ 2.3	[1]	$ 76.2	$ 1,332.8
Gross Losses on Sales	(28.8)		(11.5)	(20.3)
Credit Losses	(4.6)		(9.3)	(53.6)
Mortgage Loans and Other Invested Assets
Gross Gains on Sales	1.4		5.8	1.9
Gross Losses on Sales	0.0		0.0	(0.3)
Impairment Loss	0.0		0.0	(36.6)
Credit Losses	(1.0)		4.7	(4.6)
Gain (Loss) on Embedded Derivative	16.2		9.7	(17.0)
All Other Derivatives	2.6		3.1	(2.5)
Foreign Currency Transactions	(3.8)		(2.0)	(0.7)
Net Investment Gain (Loss)	$ (15.7)		$ 76.7	$ 1,199.1

[1] Gross gains on sales of fixed maturity securities for the year ended December 31, 2021 includes gains of $67.6 million as a result of the second phase of the reinsurance transaction that we completed during the first quarter of 2021. Gross gains on sales of fixed maturity securities for the year ended December 31, 2020 includes gains of $1,302.3 million as a result of the first phase of the reinsurance transaction that we completed during the fourth quarter of 2020. See Note 12 for further discussion.

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Investments - Additional Information (Detail)		12 Months Ended
		Dec. 31, 2022 USD ($) Integer	Dec. 31, 2021 USD ($) Integer	Dec. 31, 2020 USD ($) Integer
Schedule of Investments
Other Long-term Investments		$ 1,440,100,000	$ 1,203,000,000
Unfunded Commitments		700,000
Financing Receivable, Allowance for Credit Losses		9,300,000
Accrued Investment Income		615,000,000.0	602,700,000
Foreclosed Real Estate Expense		0	0	$ 0
Committments to Fund Commercial Mortgage Loans		5,000,000	26,300,000
Real Estate Investment Property, Net		71,600,000	119,500,000
Real Estate Investment Property, Accumulated Depreciation		122,100,000	171,300,000
Impairment of Real Estate		0	0	36,600,000
Real Estate Held-for-sale		$ 40,900,000
Repurchase agreements - Typical Days outstanding		30
Minimum percent of the fair value of securities loaned or securities purchased under repurchase agreements be maintained as collateral		102.00%
Gross Securities Loaned		$ 152,400,000	283,700,000
Outstanding Repurchase Agreements		0	0
Financing Receivable, Troubled Debt Restructuring, Postmodification		8,000,000.0
Securities Loaned		152,400,000	283,700,000
Net Investment Gain (Loss)		(15,700,000)	76,700,000	1,199,100,000
Real Estate Investment
Schedule of Investments
Net Investment Gain (Loss)		0
Perpetual Preferred Securities
Schedule of Investments
Unrealized Gain (Loss) on Investments	[1]	2,800,000	4,400,000	$ (4,600,000)
Off Balance Sheet Amount
Schedule of Investments
Cash Collateral for Borrowed Securities		88,500,000	94,800,000
Securities Received as Collateral		69,800,000	198,600,000
Commercial Real Estate
Schedule of Investments
Financing Receivable, before Allowance for Credit Loss		2,444,700,000	2,568,700,000
Financing Receivable, Allowance for Credit Losses		9,300,000	8,300,000
Accrued Investment Income		$ 7,700,000	$ 8,100,000
Financing Receivable, Modifications, Number of Contracts | Integer		0	0	0
Financing Receivable, Recorded Investment, 90 Days Past Due and Still Accruing		$ 0
Impaired Financing Receivable, with No Related Allowance, Average Recorded Investment		0	$ 0	$ 0
Unfunded Mortgage Loan Commitments
Schedule of Investments
Allowance for Credit Losses, Unfunded Mortgage Loan Commitments			100,000
Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments
Other Long-term Investments		1,195,300,000	987,900,000
Tax Credit Partnership | Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments
Other Long-term Investments		1,000,000	9,300,000
Private Equity Partnerships | Variable Interest Entity, Not Primary Beneficiary
Schedule of Investments
Other Long-term Investments		1,194,300,000	978,600,000
Investment Real Estate
Schedule of Investments
Impairment of Real Estate		0	$ 0
Private Placement Fixed Maturity
Schedule of Investments
Fair Value Disclosure, off-Balance-Sheet Risks, Amount, Liability		58,700,000
Public Utilities | Principal Forgiveness
Schedule of Investments
Financing Receivable, Troubled Debt Restructuring		4,800,000
Private Equity Partnerships
Schedule of Investments
Financing Receivable, Troubled Debt Restructuring, Postmodification		$ 4,900,000
External Credit Rating, Investment Grade
Schedule of Investments
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions		882
Number of Fixed Maturity Securities in an Unrealized Loss Position Continuously for Over One Year		262
External Credit Rating, Below-Investment-Grade
Schedule of Investments
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions		112
Number of Fixed Maturity Securities in an Unrealized Loss Position Continuously for Over One Year		16

[1] The net unrealized gain (loss) recognized in net investment income for the year ended December 31, 2022 related to perpetual preferred securities still held at December 31, 2022 was $2.8 million. The net unrealized gain (loss) recognized in net investment income for the years ended December 31, 2021 and 2020 related to perpetual preferred securities still held at year-end was $4.4 million and $(4.6) million, respectively

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Derivative Financial Instruments Nature and Amount of Collateral Received From and Posted To Our Derivative Counterparties (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative
Cash Collateral from Counterparties	$ 49.4	$ 28.4
Derivative Liability, Subject to Master Netting Arrangement, Deduction of Financial Instrument Not Offset	44.7	27.6
Cash
Derivative
Cash Collateral from Counterparties	49.4	32.0
Cash Collateral Posted to Counterparties	5.1	0.0
Fixed Maturity Securities
Derivative
FMS Collateral Posted to Counterparties	$ 39.6	$ 27.6

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Derivative Financial Instruments Fair Value Hedges Carrying Amount of Hedged Assets and Liabilities and Cumulative Basis Adjustments (Details) - Interest Rate Swaps - Receive Fixed/Pay Fixed - Designated as Hedging Instrument - Fair Value Hedging - Fixed Maturity Securities - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative Instruments and Hedging Activities Disclosures
Hedged Asset, Fair Value Hedge	$ 394.4	$ 466.3
Hedged Asset, Fair Value Hedge, Cumulative Increase (Decrease)	$ (24.8)	$ 2.0

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Location and Fair Values of Derivative Financial Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Derivative
Derivative, Notional Amount	$ 1,753.9	$ 970.5
Asset Derivatives Fair Value	89.1	39.5
Other Long-term Investments
Derivative
Asset Derivatives Fair Value	89.1	39.5
Other Liabilities
Derivative
Liability Derivatives Fair Value	87.9	65.1
Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	1,490.7	679.8
Designated as Hedging Instrument | Cash Flow Hedging
Derivative
Derivative, Notional Amount	932.9
Designated as Hedging Instrument | Forwards | Cash Flow Hedging
Derivative
Derivative, Notional Amount	764.0
Designated as Hedging Instrument | Interest Rate Swaps | Cash Flow Hedging
Derivative
Derivative, Notional Amount	168.9	181.3
Designated as Hedging Instrument | Interest Rate Swaps | Fair Value Hedging
Derivative
Derivative, Notional Amount	557.8	498.5
Designated as Hedging Instrument | Other Long-term Investments
Derivative
Asset Derivatives Fair Value	85.1	38.1
Designated as Hedging Instrument | Other Long-term Investments | Cash Flow Hedging
Derivative
Asset Derivatives Fair Value	19.1
Designated as Hedging Instrument | Other Long-term Investments | Forwards | Cash Flow Hedging
Derivative
Asset Derivatives Fair Value	1.6
Designated as Hedging Instrument | Other Long-term Investments | Interest Rate Swaps | Cash Flow Hedging
Derivative
Asset Derivatives Fair Value	17.5	16.2
Designated as Hedging Instrument | Other Long-term Investments | Interest Rate Swaps | Fair Value Hedging
Derivative
Asset Derivatives Fair Value	66.0	21.9
Designated as Hedging Instrument | Other Liabilities
Derivative
Liability Derivatives Fair Value	56.9	12.7
Designated as Hedging Instrument | Other Liabilities | Cash Flow Hedging
Derivative
Liability Derivatives Fair Value	51.5
Designated as Hedging Instrument | Other Liabilities | Forwards | Cash Flow Hedging
Derivative
Liability Derivatives Fair Value	48.4
Designated as Hedging Instrument | Other Liabilities | Interest Rate Swaps | Cash Flow Hedging
Derivative
Liability Derivatives Fair Value	3.1	7.0
Designated as Hedging Instrument | Other Liabilities | Interest Rate Swaps | Fair Value Hedging
Derivative
Liability Derivatives Fair Value	5.4	5.7
Not Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	263.2	290.7
Not Designated as Hedging Instrument | Forwards
Derivative
Derivative, Notional Amount	54.3	41.7
Not Designated as Hedging Instrument | Interest Rate Swaps
Derivative
Derivative, Notional Amount	132.0	148.2
Not Designated as Hedging Instrument | Total Return Swap
Derivative
Derivative, Notional Amount	76.9	89.2
Not Designated as Hedging Instrument | Embedded Derivative in Modified Coinsurance Arrangement
Derivative
Derivative, Notional Amount	0.0	0.0
Not Designated as Hedging Instrument | Credit Default Swaps
Derivative
Derivative, Notional Amount		11.6
Not Designated as Hedging Instrument | Other Long-term Investments
Derivative
Asset Derivatives Fair Value	4.0	1.4
Not Designated as Hedging Instrument | Other Long-term Investments | Forwards
Derivative
Asset Derivatives Fair Value	4.0	0.0
Not Designated as Hedging Instrument | Other Long-term Investments | Interest Rate Swaps
Derivative
Asset Derivatives Fair Value	0.0	1.4
Not Designated as Hedging Instrument | Other Long-term Investments | Total Return Swap
Derivative
Asset Derivatives Fair Value	0.0	0.0
Not Designated as Hedging Instrument | Other Long-term Investments | Embedded Derivative in Modified Coinsurance Arrangement
Derivative
Asset Derivatives Fair Value	0.0	0.0
Not Designated as Hedging Instrument | Other Long-term Investments | Credit Default Swaps
Derivative
Asset Derivatives Fair Value		0.0
Not Designated as Hedging Instrument | Other Liabilities
Derivative
Liability Derivatives Fair Value	31.0	52.4
Not Designated as Hedging Instrument | Other Liabilities | Forwards
Derivative
Liability Derivatives Fair Value	0.1	0.0
Not Designated as Hedging Instrument | Other Liabilities | Interest Rate Swaps
Derivative
Liability Derivatives Fair Value	17.0	22.3
Not Designated as Hedging Instrument | Other Liabilities | Total Return Swap
Derivative
Liability Derivatives Fair Value	0.0	0.0
Not Designated as Hedging Instrument | Other Liabilities | Embedded Derivative in Modified Coinsurance Arrangement
Derivative
Liability Derivatives Fair Value	$ 13.9	30.1
Not Designated as Hedging Instrument | Other Liabilities | Credit Default Swaps
Derivative
Liability Derivatives Fair Value		$ 0.0

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Derivative Financial Instruments Location of Gains and Losses Designated as Hedging Instruments, Consolidated Statements of Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss)
Net Investment Income	$ 2,122.2	$ 2,213.2	$ 2,360.7
Net Investment Gain (Loss)	(15.7)	76.7	1,199.1
Interest and Debt Expense	188.5	185.0	188.2
Derivative, Gain (Loss) on Derivative, Net	(2.6)	(3.1)	2.5
Designated as Hedging Instrument | Interest Rate Swaps | Net Investment Income | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Net Investment Income	200.0	220.4	286.1
Derivative, Gain (Loss) on Derivative, Net	51.0	64.6	75.9
Designated as Hedging Instrument | Interest Rate Swaps | Net Investment Income | Fair Value Hedging
Derivative Instruments, Gain (Loss)
Net Investment Income			0.0
Derivative, Gain (Loss) on Derivative, Net			0.0
Designated as Hedging Instrument | Interest Rate Swaps | Net Realized Investment Gain (Loss) | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Net Investment Gain (Loss)	0.0	2.7	397.7
Derivative, Gain (Loss) on Derivative, Net	0.0	2.0	32.0
Designated as Hedging Instrument | Interest Rate Swaps | Net Realized Investment Gain (Loss) | Fair Value Hedging
Derivative Instruments, Gain (Loss)
Net Investment Gain (Loss)			(0.6)
Derivative, Gain (Loss) on Derivative, Net			0.6
Designated as Hedging Instrument | Interest Rate Swaps | Interest and Debt Expense | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Interest and Debt Expense	2.9	29.2	29.2
Derivative, Gain (Loss) on Derivative, Net	0.0	5.0	1.7
Designated as Hedging Instrument | Interest Rate Swaps | Interest and Debt Expense | Fair Value Hedging
Derivative Instruments, Gain (Loss)
Interest and Debt Expense			10.1
Derivative, Gain (Loss) on Derivative, Net			(0.9)
Designated as Hedging Instrument | Foreign Exchange Contracts | Net Investment Income | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Net Investment Income	12.3	13.0	12.1
Derivative, Gain (Loss) on Derivative, Net	(0.8)	1.8	2.5
Designated as Hedging Instrument | Foreign Exchange Contracts | Net Investment Income | Fair Value Hedging
Derivative Instruments, Gain (Loss)
Net Investment Income	11.6	9.8	7.1
Derivative, Gain (Loss) on Derivative, Net	7.3	4.6	2.8
Designated as Hedging Instrument | Foreign Exchange Contracts | Net Realized Investment Gain (Loss) | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Net Investment Gain (Loss)	(2.3)	(0.1)	(0.1)
Derivative, Gain (Loss) on Derivative, Net	1.8	(0.1)	0.1
Designated as Hedging Instrument | Foreign Exchange Contracts | Net Realized Investment Gain (Loss) | Fair Value Hedging
Derivative Instruments, Gain (Loss)
Net Investment Gain (Loss)	(26.8)	(22.3)	23.3
Derivative, Gain (Loss) on Derivative, Net	26.8	22.3	(23.3)
Designated as Hedging Instrument | Foreign Exchange Contracts | Interest and Debt Expense | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Interest and Debt Expense	0.0	0.0	0.0
Derivative, Gain (Loss) on Derivative, Net	0.0	0.0	0.0
Designated as Hedging Instrument | Foreign Exchange Contracts | Interest and Debt Expense | Fair Value Hedging
Derivative Instruments, Gain (Loss)
Interest and Debt Expense	0.0	0.0	0.0
Derivative, Gain (Loss) on Derivative, Net	0.0	$ 0.0	$ 0.0
Designated as Hedging Instrument | Forwards | Net Investment Income | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Net Investment Income	0.5
Designated as Hedging Instrument | Forwards | Net Realized Investment Gain (Loss) | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Net Investment Gain (Loss)	0.0
Designated as Hedging Instrument | Forwards | Interest and Debt Expense | Cash Flow Hedging
Derivative Instruments, Gain (Loss)
Interest and Debt Expense	$ 0.0

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Location of Gains and Losses on Derivative Instruments Designated as Cash Flow Hedging Instruments (Detail) - Designated as Hedging Instrument - Cash Flow Hedging - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ (42.4)	$ 1.6	$ (5.4)
Forwards
Derivative Instruments, Gain (Loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	(49.8)	(0.6)	0.0
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax	$ 7.4	$ 2.2	$ (5.4)

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Gains and Losses on Derivatives Not Designated as Hedging Instruments (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative Instruments, Gain (Loss)
Net Gain (Loss) on Derivatives	$ 2.6	$ 3.1	$ (2.5)
Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Net Gain (Loss) on Derivatives	18.9	12.8	(19.5)
Credit Default Swaps | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Net Gain (Loss) on Derivatives	0.0	(0.3)	(0.5)
Foreign Exchange Contracts | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Net Gain (Loss) on Derivatives	2.7	3.4	(2.0)
Embedded Derivative in Modified Coinsurance Arrangement | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Net Gain (Loss) on Derivatives	16.2	9.7	(17.0)
Total Return Swap | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss)
Net Gain (Loss) on Derivatives	$ 18.9	$ (8.5)	$ 0.0

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Derivative Financial Instruments - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Derivative
Aggregate fair value of all derivative instruments with credit risk-related contingent features in a liability position	$ 74.0	$ 35.0
Interest Rate Cash Flow Hedge Gain (Loss) Reclassified to Earnings, Net		0.6	$ 30.7
Approximate amount of net deferred gains on derivative instruments expected to be amortized during the next twelve months	35.4
Component of Derivative Gain (Loss) Excluded from the Assessment of Hedge Effectiveness	17.6	16.6	(1.8)
Discontinued Hedge Accounting Due to Instrument No Longer Qualifying as Fair Value Hedge	0.0	0.0	$ 0.0
Derivative, Notional Amount	1,753.9	970.5
Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	1,490.7	679.8
Not Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	263.2	290.7
Cash Flow Hedging | Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	932.9
Interest Rate Swaps | Not Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	132.0	148.2
Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	168.9	181.3
Interest Rate Swaps | Fair Value Hedging | Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	557.8	498.5
Credit Risk Contract | Credit Default Swaps | Not Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	0.0	11.6
Forwards | Not Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	54.3	41.7
Forwards | Cash Flow Hedging | Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	764.0
Derivative, Loss on Derivative	1.2
Notional Amount Of Derivatives Terminations		250.0
Notional Amount Of Derivatives Additions	779.0	250.0
Total Return Swap | Not Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	76.9	89.2
Receive Fixed/Pay Fixed | Interest Rate Swaps | Not Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	132.0	148.2
Receive Fixed/Pay Fixed | Interest Rate Swaps | Cash Flow Hedging | Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	168.9	181.3
Receive Fixed/Pay Fixed | Interest Rate Swaps | Fair Value Hedging | Designated as Hedging Instrument
Derivative
Derivative, Notional Amount	557.8	498.5
Credit Exposure
Derivative
Credit Exposure on Derivatives	$ 1.7	$ 1.3

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Schedule of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accumulated Other Comprehensive Income (Loss)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	$ (2,756.6)	$ 354.1	$ 374.2	$ 37.3
Other Comprehensive Income (Loss) Before Reclassifications	(3,105.1)	(51.5)	359.4
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	5.6	(31.4)	22.5
Total Other Comprehensive Income (Loss)	(3,110.7)	(20.1)	336.9
Net Unrealized Gain (Loss) on Securities
Accumulated Other Comprehensive Income (Loss)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(2,023.8)	962.2	1,067.7	615.9
Other Comprehensive Income (Loss) Before Reclassifications	(3,009.2)	(169.9)	405.6
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	(23.2)	(64.4)	(46.2)
Total Other Comprehensive Income (Loss)	(2,986.0)	(105.5)	451.8
Net Gain on Hedges
Accumulated Other Comprehensive Income (Loss)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(9.6)	61.8	97.8	187.8
Other Comprehensive Income (Loss) Before Reclassifications	(30.4)	14.7	(5.7)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	41.0	50.7	84.3
Total Other Comprehensive Income (Loss)	(71.4)	(36.0)	(90.0)
Foreign Currency Translation Adjustment
Accumulated Other Comprehensive Income (Loss)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(389.1)	(273.9)	(261.3)	(281.6)
Other Comprehensive Income (Loss) Before Reclassifications	(115.2)	(12.6)	20.3
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	0.0	0.0	0.0
Total Other Comprehensive Income (Loss)	(115.2)	(12.6)	20.3
Unrecognized Pension and Postretirement Benefit Costs
Accumulated Other Comprehensive Income (Loss)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	(334.1)	(396.0)	(530.0)	$ (484.8)
Other Comprehensive Income (Loss) Before Reclassifications	49.7	116.3	(60.8)
Amounts Reclassified from Accumulated Other Comprehensive Income or Loss	(12.2)	(17.7)	(15.6)
Total Other Comprehensive Income (Loss)	$ 61.9	$ 134.0	$ (45.2)

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Schedule of Components of Unrealized Gain (Loss) on Securities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Change in Components of Net Unrealized Gain on Securities
Change in Net Unrealized Gain on Securities	$ (7,042.9)	$ (1,301.4)	$ 983.0
Fixed Maturity Securities
Change in Components of Net Unrealized Gain on Securities
Beginning of Year Balance	5,949.3	7,597.6	6,364.4
Change in Net Unrealized Gain on Securities	(8,933.7)	(1,648.3)	1,233.2
End of Year Balance	(2,984.4)	5,949.3	7,597.6
Deferred Acquisition Costs
Change in Components of Net Unrealized Gain on Securities
Beginning of Year Balance	(70.4)	(85.1)	(62.7)
Change in Net Unrealized Gain on Securities	81.7	14.7	(22.4)
End of Year Balance	11.3	(70.4)	(85.1)
Reserve for Future Policy and Contract Benefits
Change in Components of Net Unrealized Gain on Securities
Beginning of Year Balance	(4,659.5)	(6,225.6)	(5,803.1)
Change in Net Unrealized Gain on Securities	5,226.2	1,566.1	(422.5)
End of Year Balance	566.7	(4,659.5)	(6,225.6)
Reinsurance Recoverable
Change in Components of Net Unrealized Gain on Securities
Beginning of Year Balance	132.1	200.2	424.7
Change in Net Unrealized Gain on Securities	(150.2)	(68.1)	(224.5)
End of Year Balance	(18.1)	132.1	200.2
Income Tax
Change in Components of Net Unrealized Gain on Securities
Beginning of Year Balance	(389.3)	(419.4)	(307.4)
Change in Net Unrealized Gain on Securities	790.0	30.1	(112.0)
End of Year Balance	400.7	(389.3)	(419.4)
Net Unrealized Gain (Loss) on Securities
Change in Components of Net Unrealized Gain on Securities
Beginning of Year Balance	962.2	1,067.7	615.9
Change in Net Unrealized Gain on Securities	(2,986.0)	(105.5)	451.8
End of Year Balance	$ (2,023.8)	$ 962.2	$ 1,067.7

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Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Net Investment Gain (Loss)	$ (15.7)	$ 76.7	$ 1,199.1
Benefits and Change in Reserves for Future Benefits	(6,936.7)	(7,598.6)	(8,972.9)
Net Investment Income	2,122.2	2,213.2	2,360.7
Interest and Debt Expense	(188.5)	(185.0)	(188.2)
Other Expenses	(1,020.2)	(1,008.6)	(996.6)
Income Tax Expense (Benefit)	317.2	238.8	171.0
Net Income	1,314.2	824.2	793.0
Reclassification out of Accumulated Other Comprehensive Income | Net Unrealized Gain (Loss) on Securities
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Net Investment Gain (Loss)	(24.8)	60.8	1,279.7
Other-Than-Temporary Impairment Loss	(4.6)	(9.3)	(53.6)
Benefits and Change in Reserves for Future Benefits	0.0	(133.1)	(1,284.5)
Income Before Income Tax	(29.4)	(81.6)	(58.4)
Income Tax Expense (Benefit)	(6.2)	(17.2)	(12.2)
Net Income	(23.2)	(64.4)	(46.2)
Reclassification out of Accumulated Other Comprehensive Income | Net Gain on Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Income Before Income Tax	51.9	64.2	106.7
Income Tax Expense (Benefit)	10.9	13.5	22.4
Net Income	41.0	50.7	84.3
Reclassification out of Accumulated Other Comprehensive Income | Net Gain on Hedges | Interest Rate Swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Net Investment Gain (Loss)	0.0	2.0	32.0
Net Investment Income	51.1	60.6	74.1
Interest and Debt Expense	0.0	0.0	(1.5)
Reclassification out of Accumulated Other Comprehensive Income | Net Gain on Hedges | Foreign Exchange Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Net Investment Gain (Loss)	1.8	(0.1)	0.1
Net Investment Income	(1.0)	1.7	2.0
Reclassification out of Accumulated Other Comprehensive Income | Net Actuarial Loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Other Expenses	(15.7)	(22.6)	(19.8)
Reclassification out of Accumulated Other Comprehensive Income | Prior Service Credit
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Other Expenses	0.2	0.2	0.1
Reclassification out of Accumulated Other Comprehensive Income | Curtailment Gain
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Other Expenses	0.0	0.0	(0.1)
Reclassification out of Accumulated Other Comprehensive Income | Unrecognized Pension and Postretirement Benefit Costs
Reclassification Adjustment out of Accumulated Other Comprehensive Income
Income Before Income Tax	(15.5)	(22.4)	(19.8)
Income Tax Expense (Benefit)	(3.3)	(4.7)	(4.2)
Net Income	$ (12.2)	$ (17.7)	$ (15.6)

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Liability for Unpaid Claims and Claims Adjustment Expense (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Causes of Increase (Decrease) in Liability for Unpaid Claims and Claims Adjustment Expense
Balance at January 1	$ 23,664.7	$ 24,180.2	$ 23,076.7
Less Reinsurance Recoverable	8,697.8	8,378.9	2,246.8
Net Balance at January 1	14,966.9	15,801.3	20,829.9
Incurred Related to
Current Year	6,721.3	7,252.6	6,327.8
Paid Related to
Current Year	(3,062.9)	(3,263.4)	(2,727.0)
Prior Years	(3,786.0)	(3,774.1)	(4,430.3)
Total Paid	(6,848.9)	(7,037.5)	(7,157.3)
Reserves Ceded Pursuant to Reinsurance Transaction	0.0	(990.0)	(6,141.5)
Net Balance at December 31	14,553.0	14,966.9	15,801.3
Plus Reinsurance Recoverable	8,279.8	8,697.8	8,378.9
Balance at December 31	22,832.8	23,664.7	24,180.2
Amount Related to Interest
Incurred Related to
Prior Years	595.6	683.4	997.8
Incurred Claims
Incurred Related to
Prior Years	(646.0)	(719.5)	878.7
Foreign Currency
Incurred Related to
Prior Years	(235.9)	(23.4)	65.9
Operating Expense
Incurred Related to
Total Incurred	$ 6,435.0	$ 7,193.1	$ 8,270.2

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Reconciliation of Policy and Contract Benefits and Reserves for Future Policy and Contract Benefits (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Insurance [Abstract]
Policy and Contract Benefits	$ 1,839.8	$ 1,907.7	$ 1,855.4
Reserves for Future Policy and Contract Benefits	42,330.2	48,007.5	49,653.0
Total Policy and Contract Benefits and Reserves for Future Policy and Contract Benefits	44,170.0	49,915.2	51,508.4
Life Reserves for Future Policy and Contract Benefits	8,428.5	8,457.1	8,371.7
Accident and Health Active Life Reserves	13,475.4	13,133.9	12,730.9
Adjustment Related to Unrealized Investment Gains and Losses	(566.7)	4,659.5	6,225.6
Liability for Unpaid Claims and Claim Adjustment Expense	$ 22,832.8	$ 23,664.7	$ 24,180.2	$ 23,076.7

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Liability for Unpaid Claims - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021	Dec. 16, 2020	Dec. 31, 2019
Liability for Unpaid Claims and CAE Narrative Information
Unum US Group Long-term Disability Reserve Reduction, Before Tax	$ 121.0	$ 215.0
Closed Block Long-term Care Reserve Increase, Before Tax		2.1
Closed Block Individual Disability Reserve Increase, Before Tax		6.4
Net Reduction in Unpaid Claims as a Result of Assumption Updates, Before Tax	155.0	206.5
Long-term Care Reserve Increase, Before Tax			$ 151.5
Reinsurance Recoverables, Incurred but Not Reported Claims	8,279.8	8,697.8	8,378.9			$ 2,246.8
Unum US Group Life Reserve Reduction, Before Tax	$ 34.0
Closed Block Individual Disability Reinsurance Transaction
Liability for Unpaid Claims and CAE Narrative Information
Increase in Benefits and Change in Reserves for Future Benefits		133.1	1,284.5
Reinsurance Recoverables, Incurred but Not Reported Claims				$ 990.0	$ 6,141.5
Closed Block Individual Disability Reinsurance Transaction | Phase 1
Liability for Unpaid Claims and CAE Narrative Information
Increase in Benefits and Change in Reserves for Future Benefits			1,284.5
Reinsurance Recoverables, Incurred but Not Reported Claims			6,141.5
Closed Block Individual Disability Reinsurance Transaction | Phase 2
Liability for Unpaid Claims and CAE Narrative Information
Increase in Benefits and Change in Reserves for Future Benefits		133.1
Reinsurance Recoverables, Incurred but Not Reported Claims		$ 990.0
Claim Reserve
Liability for Unpaid Claims and CAE Narrative Information
Long-term Care Reserve Increase, Before Tax			$ 7.0

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Income Tax Expense (Benefit) (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax [Abstract]
Income Tax Expense	$ 317.2	$ 238.8	$ 171.0
Other Comprehensive Income (Loss), Tax
Change in Net Unrealized Gain on Securities Before Adjustment	(1,890.8)	(346.9)	250.2
Change in Adjustment to Deferred Acquisition Costs and Reserves for Future Policy and Contract Benefits, Net of Reinsurance	1,100.8	316.8	(138.2)
Change in Net Gain on Hedges	(19.2)	(9.8)	(23.8)
Change in Foreign Currency Translation Adjustment	(0.1)	4.2	(4.3)
Change in Unrecognized Pension and Postretirement Benefit Costs	18.9	42.1	(34.8)
Total	$ (473.2)	$ 245.2	$ 220.1

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Reconciliation of income tax computed at US Federal tax rates (Detail)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax [Abstract]
Statutory Income Tax	21.00%	21.00%	21.00%
Net Operating Loss Carryback	0.00%	(0.70%)	(3.80%)
Tax Exempt Income	(1.10%)	(1.10%)	(0.80%)
Tax Credits	(0.30%)	(0.90%)	(1.30%)
Policyholder Reserves	(1.90%)	2.40%	0.70%
Other Items, Net	1.70%	1.80%	1.90%
Effective Tax	19.40%	22.50%	17.70%

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Schedule of deferred income tax assets and liabilities (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Income Tax [Abstract]
Deferred Tax Assets, Investments	$ 664.9	$ 0.0
Deferred Tax Asset, Reserves	0.0	889.7
Deferred Tax Asset, Employee Benefits	158.3	176.6
Deferred Tax Asset, Other	34.4	57.5
Deferred Tax Assets, Gross, Total	857.6	1,123.8
Less: Valuation Allowance	10.3	12.7
Deferred Tax Assets, Net of Valuation Allowance, Total	847.3	1,111.1
Deferred Tax Liabilities for Deferred Acquisition Cost	113.1	134.9
Deferred Tax Liabilities for Fixed Assets	48.9	71.1
Deferred Tax Liabilities on Invested Assets	0.0	1,144.9
Deferred Tax Liabilities, Other Comprehensive Income	43.2	0.0
Deferred Tax Liabilities on Cost of Reinsurance	156.8	171.6
Deferred Tax Liability, Other	44.7	47.0
Gross Deferred Tax Liability	406.7	1,569.5
Deferred Income Tax	$ 440.6
Deferred Tax Liabilities, Net, Total		$ (458.4)

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Schedule of Income subject to domestic and foreign taxation (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax [Abstract]
Income Before Tax, Domestic	$ 1,492.8	$ 957.0	$ 924.7
Income Before Tax, Foreign	138.6	106.0	39.3
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,631.4	1,063.0	964.0
Current Tax Expense (Benefit), Domestic	306.5	180.7	(98.4)
Current State and Local Tax Expense (Benefit)	12.7	2.6	1.5
Current Tax Expense (Benefit), Foreign	154.3	29.5	(19.7)
Income Tax (Benefit) - Current	473.5	212.8	(116.6)
Deferred Tax Expense (Benefit), Federal	20.9	13.3	250.5
Deferred State and Local Income Tax Expense (Benefit)	1.1	(2.2)	1.0
Deferred Tax Expense (Benefit), Foreign	(178.3)	14.9	36.1
Deferred Income Tax Expense (Benefit)	(156.3)	26.0	287.6
Income Tax Expense	$ 317.2	$ 238.8	$ 171.0

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Unrecognized tax benefits (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax [Abstract]
Balance at Beginning of Year	$ 198.8	$ 219.7	$ 241.0
Decreases for Tax Positions Related to Prior Years	(21.0)	(20.9)	(21.0)
Lapse of the Applicable Statute of Limitations	(0.4)	0.0	(0.3)
Balance at End of Year	177.4	198.8	219.7
Less Tax Attributable to Temporary Items Included Above	(63.5)	(84.7)	(105.9)
Total Unrecognized Tax Benefits that if Recognized Would Affect the Effective Tax Rate	$ 113.9	$ 114.1	$ 113.8

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Income Tax Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2018
Federal Income Tax Note
Income Taxes Receivable, Net Operating Loss, CARES Act			$ 36.5
Less Tax Attributable to Temporary Items Included Above	$ (63.5)	$ (84.7)	(105.9)
Unrecognized Tax Benefits, Interest on Income Taxes Expense	7.8	5.5	7.8
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	34.0	26.2	20.6
Valuation Allowance on Deferred Tax Assets	10.3	12.7
Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount	2.4	1.8
Income Taxes Paid, Net	375.0	51.0	200.0
Tax Year 2017
Federal Income Tax Note
Increases for Tax Positions Related to Prior Years				$ 261.1
Foreign Tax Authority | Her Majesty's Revenue and Customs (HMRC)
Federal Income Tax Note
Tax Expense for Revaluation of Tax Assets and Liabilities due to Finance Bill 2019-21		$ 24.2	$ 9.3
State and Local Jurisdiction
Federal Income Tax Note
Operating Loss Carryforwards	$ 187.6

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Debt Schedule (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument
Long-term Debt, Excluding Current Maturities	$ 3,427.8	$ 3,442.2
Debt Instrument, Unamortized Premium (Discount), Net	2.5	2.3
Debt Issuance Costs, Noncurrent, Net	(33.2)	(34.6)
Long-term Debt	3,429.8	3,442.2
Five-Year Term Loan Facility
Debt Instrument
Line of Credit Facility, Fair Value of Amount Outstanding	350.0	0.0
Notes Issued in 1998 with 2028 Maturity Date | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	335.8	335.8
Notes Issued in 2002 | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	39.5	39.5
Notes Payable due 2042 | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	500.0	500.0
Notes Issued in 2014 | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	0.0	350.0
Notes Issued in 2015 | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	275.0	275.0
Notes Issued in 2019 | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	400.0	400.0
Notes Issued in 2019 due 2049 | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	450.0	450.0
Notes Issued in 2021 due 2051 | Senior Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	600.0	600.0
Notes Issued 1990 to 1996 | Medium-term Notes
Debt Instrument
Short-term Debt, outstanding principal	2.0	0.0
Notes Issued 1990 to 1996 | Medium-term Notes
Debt Instrument
Long-term Debt, Excluding Current Maturities	18.5	20.5
Notes Issued in 1998 with 2038 Maturity Date | Junior Subordinated Debt
Debt Instrument
Long-term Debt, Excluding Current Maturities	189.7	203.7
Notes Issued in 2018 with a 2058 Maturity Date | Junior Subordinated Debt
Debt Instrument
Long-term Debt, Excluding Current Maturities	$ 300.0	$ 300.0

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Debt - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2007	Dec. 31, 1998	Dec. 31, 2019
Debt Additional Information
Repayments of Principal in 2023	$ 2.0
Repayments of Principal in 2025	275.0
Repayments of Principal in 2027	350.0
Repayments of Principal Thereafter	$ 2,833.5
Unum Group Percentage Ownership of Provident Financing Trust	100.00%
Derivative, Notional Amount	$ 1,753.9	$ 970.5
Interest Paid, Including Capitalized Interest, Operating and Investing Activities	172.9	181.6	$ 178.1
Five-year Unsecured Revolving Credit Facility
Debt Additional Information
Letters of Credit Outstanding	0.4
Line of Credit Facility, Maximum Borrowing Capacity	500.0
Line of Credit Facility, Additional Borrowing Capacity If Requested	200.0
Parent Company | Five-year Unsecured Revolving Credit Facility
Debt Additional Information
Letters of Credit Outstanding	0.0
Parent Company | Facility agreement for contingent issuance of senior notes
Debt Additional Information
Line of Credit Facility, Maximum Borrowing Capacity	$ 400.0
Line of Credit Facility, Commitment Fee Percentage	2.225%
Debt Instrument, Covenant Description	2.0 billion
Notes Issued in 1998 with 2038 Maturity Date | Junior Subordinated Debt
Debt Additional Information
Stated Interest Rate of Debt					7.405%
Proceeds from Issuance of Senior Long-term Debt					$ 300.0
Liquidation value per capital security	$ 1,000
7.405% junior subordinated debt securities due 2038
Debt Additional Information
Debt Instrument, Repurchased Face Amount	$ 14.0
Costs Related to Early Retirement of Debt	1.2
Notes 5.625 Due 2020
Debt Additional Information
Debt Instrument, Repurchased Face Amount		400.0
4.500% Senior Notes due 2025
Debt Additional Information
Costs Related to Early Retirement of Debt	67.3
4.500% Senior Notes due 2025 | Senior Notes
Debt Additional Information
Proceeds from Issuance of Debt		500.0
Secured Notes Issued in 2007 | Senior Notes
Debt Additional Information
Extinguishment of Debt, Amount		$ 35.0
4.125% Senior Notes due 2051 | Senior Notes
Debt Additional Information
Proceeds from Issuance of Debt	$ 600.0
Stated Interest Rate of Debt	4.125%
4.000% Notes due 2024
Debt Additional Information
Stated Interest Rate of Debt	4.00%
Debt Instrument, Repurchased Face Amount	$ 350.0
Costs Related to Early Retirement of Debt	$ 3.0
Senior Notes | Notes 5.625 Due 2020
Debt Additional Information
Stated Interest Rate of Debt		5.625%
Senior Notes | 4.500% Senior Notes due 2025
Debt Additional Information
Stated Interest Rate of Debt		4.50%
Junior Subordinated Debt | Junior Subordinated Notes Payable Due 2038
Debt Additional Information
Stated Interest Rate of Debt					7.405%
Receive Fixed/Pay Variable | Interest Rate Swaps
Debt Additional Information
Notional Amount Of Derivatives Terminations			$ 250.0
Derivative, Notional Amount						$ 250.0
Northwind Holdings LLC
Debt Additional Information
Proceeds from Issuance of Senior Long-term Debt				$ 800.0
Periodic Principal Payments		$ 45.0
Basis Spread on LIBOR				0.78%

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Employee Benefit Plans Change in Projected Benefit Obligation Amount (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan | UNITED STATES
Defined Benefit Plan, Change in Benefit Obligation
Benefit Obligation at Beginning of Year	$ 2,207.5	$ 2,277.2
Service Cost	7.7	9.6	$ 11.0
Interest Cost	67.2	65.0	73.0
Plan Participant Contributions	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(604.1)	(57.9)
Benefits and Expenses Paid	(92.8)	(86.4)
Change in Foreign Exchange Rates	0.0	0.0
Benefit Obligation at End of Year	1,585.5	2,207.5	2,277.2
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair Value of Plan Assets at Beginning of Year	1,801.7	1,710.9
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	(410.6)	167.6
Employer Contributions to Defined Benefit Plan	10.0	9.6
Plan Participant Contributions	0.0	0.0
Benefits and Expenses Paid	(92.8)	(86.4)
Effect of Foreign Exchange Rates on Plan Assets	0.0	0.0
Fair Value of Plan Assets at End of Year	1,308.3	1,801.7	1,710.9
Accumulated Benefit Obligation	1,585.5	2,207.5
Funded Status of Plan	277.2	405.8
Pension Plan | UNITED KINGDOM
Defined Benefit Plan, Change in Benefit Obligation
Benefit Obligation at Beginning of Year	278.3	300.0
Service Cost	0.0	0.0	0.0
Interest Cost	5.0	4.2	4.9
Plan Participant Contributions	0.0	0.0
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(92.4)	(18.0)
Benefits and Expenses Paid	(5.4)	(5.2)
Change in Foreign Exchange Rates	(27.6)	(2.7)
Benefit Obligation at End of Year	157.9	278.3	300.0
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair Value of Plan Assets at Beginning of Year	303.7	294.1
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	(128.4)	18.0
Employer Contributions to Defined Benefit Plan	0.0	0.0
Plan Participant Contributions	0.0	0.0
Benefits and Expenses Paid	(5.4)	(5.2)
Effect of Foreign Exchange Rates on Plan Assets	(29.4)	(3.2)
Fair Value of Plan Assets at End of Year	140.5	303.7	294.1
Accumulated Benefit Obligation	158.0	276.5
Funded Status of Plan	17.4	(25.4)
Other Postretirement Benefit Plans
Defined Benefit Plan, Change in Benefit Obligation
Benefit Obligation at Beginning of Year	110.3	120.5
Service Cost	0.0	0.0	0.0
Interest Cost	3.0	3.0	4.1
Plan Participant Contributions	0.1	0.1
Defined Benefit Plan, Benefit Obligation, Actuarial Gain (Loss)	(19.4)	(3.0)
Benefits and Expenses Paid	(10.1)	(10.3)
Change in Foreign Exchange Rates	0.0	0.0
Benefit Obligation at End of Year	83.9	110.3	120.5
Defined Benefit Plan, Change in Fair Value of Plan Assets
Fair Value of Plan Assets at Beginning of Year	9.0	9.3
Defined Benefit Plan, Plan Assets, Increase (Decrease) for Actual Return (Loss)	0.1	0.1
Employer Contributions to Defined Benefit Plan	9.4	9.8
Plan Participant Contributions	0.1	0.1
Benefits and Expenses Paid	(10.1)	(10.3)
Effect of Foreign Exchange Rates on Plan Assets	0.0	0.0
Fair Value of Plan Assets at End of Year	8.5	9.0	$ 9.3
Funded Status of Plan	$ 75.4	$ 101.3

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Employee Benefit Plans Amounts Recognized in Balance Sheet (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans
Current Pension Liability	$ 8.8	$ 8.4
Noncurrent Pension Liability	268.4	397.4
Noncurrent Pension Asset	0.0	0.0
Funded Status of Plan	277.2	405.8
Net Actuarial Gain (Loss) in Balance Sheet	(517.8)	(621.8)
Prior Service Credit in Balance Sheet	(0.6)	(0.6)
Pension Recognized in Balance Sheet, Gross of Deferred Tax	(518.4)	(622.4)
Pension Deferred Tax Asset in Balance Sheet	213.5	239.2
Pension Recognized in Balance Sheet, Net of Deferred Tax	(304.9)	(383.2)	$ (494.6)
Pension Plan | UNITED KINGDOM
Defined Benefit Plans and Other Postretirement Benefit Plans
Current Pension Liability	0.0	0.0
Noncurrent Pension Liability	17.4	0.0
Noncurrent Pension Asset	0.0	(25.4)
Funded Status of Plan	17.4	(25.4)
Net Actuarial Gain (Loss) in Balance Sheet	(83.7)	(42.9)
Prior Service Credit in Balance Sheet	(0.2)	(0.2)
Pension Recognized in Balance Sheet, Gross of Deferred Tax	(83.9)	(43.1)
Pension Deferred Tax Asset in Balance Sheet	19.5	9.1
Pension Recognized in Balance Sheet, Net of Deferred Tax	(64.4)	(34.0)	(54.7)
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Current Pension Liability	1.1	1.4
Noncurrent Pension Liability	74.3	99.9
Noncurrent Pension Asset	0.0	0.0
Funded Status of Plan	75.4	101.3
Net Actuarial Gain (Loss) in Balance Sheet	31.6	13.6
Prior Service Credit in Balance Sheet	2.5	2.7
Pension Recognized in Balance Sheet, Gross of Deferred Tax	34.1	16.3
Pension Deferred Tax Asset in Balance Sheet	1.1	4.9
Pension Recognized in Balance Sheet, Net of Deferred Tax	$ 35.2	$ 21.2	$ 19.3

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Employee Benefit Plans Amounts Recognized in Other Comprehensive Income (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans
Pension Recognized in Balance Sheet, Net of Deferred Tax, Beginning of Year	$ (383.2)	$ (494.6)
Amortization of Net Actuarial Loss (Gain)	16.3	21.3	$ 18.7
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	87.7	124.8
Amortization of Prior Service Cost (Credit)	0.0	0.0	0.1
Change in Unrecognized Pension and Postretirement Benefit Costs, Tax Expense	(25.7)	(34.7)
Pension Recognized in Balance Sheet, Net of Deferred Tax, End of Year	(304.9)	(383.2)	(494.6)
Pension Plan | UNITED KINGDOM
Defined Benefit Plans and Other Postretirement Benefit Plans
Pension Recognized in Balance Sheet, Net of Deferred Tax, Beginning of Year	(34.0)	(54.7)
Amortization of Net Actuarial Loss (Gain)	0.4	1.3	1.1
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	(41.2)	26.3
Amortization of Prior Service Cost (Credit)	0.0	0.0	0.0
Change in Unrecognized Pension and Postretirement Benefit Costs, Tax Expense	10.4	(6.9)
Pension Recognized in Balance Sheet, Net of Deferred Tax, End of Year	(64.4)	(34.0)	(54.7)
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Pension Recognized in Balance Sheet, Net of Deferred Tax, Beginning of Year	21.2	19.3
Amortization of Net Actuarial Loss (Gain)	(1.0)	0.0	0.0
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, before Tax	19.0	2.6
Amortization of Prior Service Cost (Credit)	(0.2)	(0.2)	(0.2)
Change in Unrecognized Pension and Postretirement Benefit Costs, Tax Expense	(3.8)	(0.5)
Pension Recognized in Balance Sheet, Net of Deferred Tax, End of Year	$ 35.2	$ 21.2	$ 19.3

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Employee Benefit Plans US Pension Assets, Fair Value Measurement by Input Level (Details) - UNITED STATES - Pension Plan - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
U.S. Large Cap
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		$ 144.9
U.S. Large Cap | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
U.S. Large Cap | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
U.S. Large Cap | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
U.S. Large Cap | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		144.9
U.S. Small Cap
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		63.3
U.S. Small Cap | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		32.8
U.S. Small Cap | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
U.S. Small Cap | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
U.S. Small Cap | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		30.5
Global
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	$ 463.1	388.7
Global | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	57.4	0.0
Global | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Global | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Global | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	405.7	388.7
Emerging Markets
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		59.8
Emerging Markets | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
Emerging Markets | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
Emerging Markets | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		0.0
Emerging Markets | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount		59.8
U.S. Government and Agencies
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	215.7	419.3
U.S. Government and Agencies | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	194.0	419.3
U.S. Government and Agencies | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	21.7	0.0
U.S. Government and Agencies | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
U.S. Government and Agencies | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Corporate
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	129.6	103.3
Corporate | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Corporate | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Corporate | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Corporate | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	129.6	103.3
Foreign Emerging Market Fixed Income Securities
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	54.0
Foreign Emerging Market Fixed Income Securities | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0
Foreign Emerging Market Fixed Income Securities | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0
Foreign Emerging Market Fixed Income Securities | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0
Foreign Emerging Market Fixed Income Securities | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	54.0
Opportunistic Credits
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	132.3	212.5
Opportunistic Credits | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Opportunistic Credits | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Opportunistic Credits | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Opportunistic Credits | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	132.3	212.5
Real Estate
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	164.2	247.1
Real Estate | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Real Estate | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Real Estate | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Real Estate | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	164.2	247.1
Private Equity Direct Investments
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	74.5	80.4
Private Equity Direct Investments | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Private Equity Direct Investments | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Private Equity Direct Investments | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Private Equity Direct Investments | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	74.5	80.4
Private Equity Funds of Funds
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	47.6	50.5
Private Equity Funds of Funds | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Private Equity Funds of Funds | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Private Equity Funds of Funds | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Private Equity Funds of Funds | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	47.6	50.5
Cash Equivalents
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	20.5	31.9
Cash Equivalents | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	20.5	31.9
Cash Equivalents | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Cash Equivalents | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Cash Equivalents | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Total Invested Assets
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	1,301.5	1,801.7
Total Invested Assets | Fair Value, Inputs, Level 1
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	271.9	484.0
Total Invested Assets | Fair Value, Inputs, Level 2
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	21.7	0.0
Total Invested Assets | Fair Value, Inputs, Level 3
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Total Invested Assets | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plan Disclosure
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	$ 1,007.9	$ 1,317.7

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Employee Benefit Plans UK Pension Assets, Fair Value Measurement by Input Level (Details) - Pension Plan - UNITED KINGDOM - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Diversified Growth Assets
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	$ 40.6	$ 157.3
Diversified Growth Assets | Fair Value, Inputs, Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	32.3	113.1
Diversified Growth Assets | Fair Value, Inputs, Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Diversified Growth Assets | Fair Value, Inputs, Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Diversified Growth Assets | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	8.3	44.2
Fixed Income and Index-linked Securities
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	70.6	124.1
Fixed Income and Index-linked Securities | Fair Value, Inputs, Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	70.6	124.1
Fixed Income and Index-linked Securities | Fair Value, Inputs, Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Fixed Income and Index-linked Securities | Fair Value, Inputs, Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Fixed Income and Index-linked Securities | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Alternative Investments
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	28.1	18.2
Alternative Investments | Fair Value, Inputs, Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Alternative Investments | Fair Value, Inputs, Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Alternative Investments | Fair Value, Inputs, Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Alternative Investments | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	28.1	18.2
Cash Equivalents
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	1.9	4.1
Cash Equivalents | Fair Value, Inputs, Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	1.9	4.1
Cash Equivalents | Fair Value, Inputs, Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Cash Equivalents | Fair Value, Inputs, Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Cash Equivalents | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Total Invested Assets
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	141.2	303.7
Total Invested Assets | Fair Value, Inputs, Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	104.8	241.3
Total Invested Assets | Fair Value, Inputs, Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Total Invested Assets | Fair Value, Inputs, Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	0.0	0.0
Total Invested Assets | Fair Value Measured at Net Asset Value Per Share
Defined Benefit Plans and Other Postretirement Benefit Plans
Defined Benefit Plan, Plan Assets, Investment within Plan Asset Category, Amount	$ 36.4	$ 62.4

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Employee Benefit Plans OPEB Plan Assets, Fair Value Measurements by Input Level (Details) - Other Postretirement Benefit Plans - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Defined Benefit Plans and Other Postretirement Benefit Plans
Life Settlement Contracts, Fair Value Method, Face Value	$ 8.5	$ 9.0
Fair Value, Inputs, Level 1
Defined Benefit Plans and Other Postretirement Benefit Plans
Life Settlement Contracts, Fair Value Method, Face Value	0.0	0.0
Fair Value, Inputs, Level 2
Defined Benefit Plans and Other Postretirement Benefit Plans
Life Settlement Contracts, Fair Value Method, Face Value	0.0	0.0
Fair Value, Inputs, Level 3
Defined Benefit Plans and Other Postretirement Benefit Plans
Life Settlement Contracts, Fair Value Method, Face Value	$ 8.5	$ 9.0

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Employee Benefit Plans OPEB Changes in Assets Measured at Fair Value Using Signficant Unobservable Inputs (Details) - Other Postretirement Benefit Plans - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Fair Value of Plan Assets at Beginning of Year	$ 9.0	$ 9.3
Fair Value of Plan Assets at End of Year	8.5	9.0
Fair Value, Inputs, Level 3 | Life Insurance Contracts
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation
Fair Value of Plan Assets at Beginning of Year	9.0	9.3
Actual Return on Plan Assets Still Held	0.1	0.1
Plan Participant Contributions	9.5	9.9
Defined Benefit Plan, Plan Assets, Benefits Paid	10.1	10.3
Fair Value of Plan Assets at End of Year	$ 8.5	$ 9.0

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Employee Benefit Plans Measurement Assumptions (Details)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Pension Plan | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	5.70%	3.10%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	3.10%	2.90%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	6.00%	6.00%
Pension Plan | UNITED KINGDOM
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	4.80%	2.00%
Rate of Compensation Increase Assumptions Used Calculating Benefit Obligation	2.50%	2.90%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	2.00%	1.40%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	4.20%	3.50%
Rate of Compensation Increase Assumptions Used Calculating Net Periodic Benefit Cost	2.90%	2.80%
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Discount Rate Assumptions Used Calculating Benefit Obligation	5.70%	2.90%
Discount Rate Assumptions Used Calculating Net Periodic Benefit Cost	2.90%	2.60%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets	5.75%	5.75%

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Employee Benefit Plans Net Periodic Benefit Cost (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Plan | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans
Service Cost	$ 7.7	$ 9.6	$ 11.0
Interest Cost	67.2	65.0	73.0
Expected Return on Plan Assets	(105.9)	(100.6)	(106.7)
Amortization of Net Actuarial Loss (Gain)	16.3	21.3	18.7
Amortization of Prior Service Cost (Credit)	0.0	0.0	0.1
Curtailment Gain	0.0	0.0	0.0
Net Periodic Benefit Cost	(14.7)	(4.7)	(3.9)
Pension Plan | UNITED KINGDOM
Defined Benefit Plans and Other Postretirement Benefit Plans
Service Cost	0.0	0.0	0.0
Interest Cost	5.0	4.2	4.9
Expected Return on Plan Assets	(10.9)	(9.8)	(9.5)
Amortization of Net Actuarial Loss (Gain)	0.4	1.3	1.1
Amortization of Prior Service Cost (Credit)	0.0	0.0	0.0
Curtailment Gain	0.0	0.0	0.1
Net Periodic Benefit Cost	(5.5)	(4.3)	(3.4)
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Service Cost	0.0	0.0	0.0
Interest Cost	3.0	3.0	4.1
Expected Return on Plan Assets	(0.5)	(0.5)	(0.5)
Amortization of Net Actuarial Loss (Gain)	(1.0)	0.0	0.0
Amortization of Prior Service Cost (Credit)	(0.2)	(0.2)	(0.2)
Curtailment Gain	0.0	0.0	0.0
Net Periodic Benefit Cost	$ 1.3	$ 2.3	$ 3.4

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Employee Benefit Plans Expected Benefit Payments (Details) $ in Millions	Dec. 31, 2022 USD ($)
Pension Plan | UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans
Benefit Payments in Year One	$ 84.9
Benefit Payments in Year Two	88.2
Benefit Payments in Year Three	92.1
Benefit Payments in Year Four	96.5
Benefit Payments in Year Five	100.6
Benefit Payments in Five Fiscal Years Thereafter	550.6
Pension Plan | UNITED KINGDOM
Defined Benefit Plans and Other Postretirement Benefit Plans
Benefit Payments in Year One	5.4
Benefit Payments in Year Two	5.5
Benefit Payments in Year Three	5.7
Benefit Payments in Year Four	5.8
Benefit Payments in Year Five	6.0
Benefit Payments in Five Fiscal Years Thereafter	32.4
Other Postretirement Benefit Plans
Defined Benefit Plans and Other Postretirement Benefit Plans
Benefit Payments in Year One	10.0
Prescription Drug Subsidy Receipts in Year One	0.1
Net OPEB Payments in Year One	9.9
Benefit Payments in Year Two	9.4
Prescription Drug Subsidy Receipts in Year Two	0.1
Net OPEB Payments in Year Two	9.3
Benefit Payments in Year Three	9.0
Prescription Drug Subsidy Receipts in Year Three	0.1
Net OPEB Payments in Year Three	8.9
Benefit Payments in Year Four	8.5
Prescription Drug Subsidy Receipts in Year Four	0.0
Net OPEB Payments in Year Four	8.5
Benefit Payments in Year Five	8.1
Prescription Drug Subsidy Receipts in Year Five	0.0
Net OPEB Payments in Year Five	8.1
Benefit Payments in Five Fiscal Years Thereafter	34.0
Prescription Drug Subsidy Receipts in Five Fiscal Years Thereafter	0.1
Net OPEB Payments in Five Fiscal Years Thereafter	$ 33.9

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Employee Benefit Plans - Additional Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension and Other Postretirement Benefits Disclosure
Health Care Cost Trend Rate Assumed for Next Fiscal Year	7.00%	6.25%
Ultimate Health Care Cost Trend Rate	5.00%
Defined Benefit Plan, Year Health Care Cost Trend Rate Reaches Ultimate Trend Rate	2031
Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Average Remaining Life Expectancy of Plan Participants	24 years
Alternative Investments, Unfunded Commitments	$ 24.5	$ 28.5
Pension Plan | UNITED KINGDOM
Pension and Other Postretirement Benefits Disclosure
Average Remaining Life Expectancy of Plan Participants	28 years
Alternative Investments, Unfunded Commitments	$ 17.3	28.1
Other Postretirement Benefit Plans
Pension and Other Postretirement Benefits Disclosure
Average Remaining Expected Working Life of Plan Participants	2 years
Investment Level 3 Transfers Into	$ 0.0	0.0
Investment Level 3 Transfers Out of	$ 0.0	$ 0.0
Interest Rate During Period	4.31%	4.59%
Other Postretirement Benefit Plans | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Matching Contribution Percent of Employees' Gross Pay	5.00%
Employer Discretionary Contribution Percentage of earnings	4.50%
Cost Recognized	$ 70.9	$ 71.0	$ 83.4
Other Postretirement Benefit Plans | UNITED KINGDOM
Pension and Other Postretirement Benefits Disclosure
Defined Contribution Plan, Minimum Employee Contribution Eligible for Matching	1.00%
Defined Contribution Plan, Maximum Employee Contribution Eligible for Matching	5.00%
Cost Recognized	$ 4.9	$ 4.9	$ 5.0
Equity Securities | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	38.00%
Fixed Maturity Securities | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	30.00%
Diversified Growth Assets | Pension Plan | UNITED KINGDOM
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	50.00%
Alternative Investments | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	32.00%
Fixed Income and Index-linked Securities | Pension Plan | UNITED KINGDOM
Pension and Other Postretirement Benefits Disclosure
Defined Benefit Plan, Plan Assets, Target Allocation, Percentage	50.00%
Minimum | Other Postretirement Benefit Plans | UNITED KINGDOM
Pension and Other Postretirement Benefits Disclosure
Matching Contribution Percent of Employees' Gross Pay	8.00%
Minimum | Private Equity Funds of Funds | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Private Equity Partnership Future Liquidation Term	5 years
Maximum | Other Postretirement Benefit Plans | UNITED KINGDOM
Pension and Other Postretirement Benefits Disclosure
Matching Contribution Percent of Employees' Gross Pay	12.00%
Maximum | Private Equity Funds of Funds | Pension Plan | UNITED STATES
Pension and Other Postretirement Benefits Disclosure
Private Equity Partnership Future Liquidation Term	8 years

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Basic and Diluted Earnings Per Share (Detail) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Numerator
Net Income	$ 1,314.2	$ 824.2	$ 793.0
Denominator
Weighted Average Common Shares - Basic	200,647,200	204,232,900	203,642,000
Dilution for Assumed Exercises of Stock Options and Nonvested Stock Awards	1,462,200	615,000.0	113,300
Weighted Average Common Shares - Assuming Dilution	202,109,400	204,847,900	203,755,300
Net Income Per Common Share
Basic	$ 6.55	$ 4.04	$ 3.89
Assuming Dilution	$ 6.50	$ 4.02	$ 3.89

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Treasury Stock Transactions (Details) - USD ($) shares in Millions, $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Class of Stock Disclosures [Abstract]
Number of Treasury Shares Repurchased		5.7	1.9	0.0
Cost of Shares Repurchased	[1]	$ 200.1	$ 50.0	$ 0.0
Commission Paid on Stock Repurchases		$ 0.1

[1] Includes commissions of $0.1 million for the year ended December 31, 2022.

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Stockholders' Equity and Earnings Per Common Share - Additional Information (Detail) - USD ($) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Feb. 21, 2023	Dec. 01, 2022	Oct. 25, 2021
Stockholders Equity and Earnings Per Common Share Additional Information [Line Items]
Antidilutive Securities Excluded from Computation of Earnings Per Share		100,000	1,100,000	1,600,000
Cost of Shares Repurchased	[1]	$ 200.1	$ 50.0	$ 0.0
Number of Treasury Shares Repurchased		5,700,000	1,900,000	0
Authorized Shares of Preferred Stock		25,000,000
Par Value Per Share of Preferred Stock		$ 0.10
Issued Shares of Preferred Stock		0
Accelerated Share Repurchase Agreement [Member]
Stockholders Equity and Earnings Per Common Share Additional Information [Line Items]
Cost of Shares Repurchased		$ 50.0	$ 50.0
Number of Treasury Shares Repurchased		1,700,000	1,900,000
Open Market Share Repurchases [Member]
Stockholders Equity and Earnings Per Common Share Additional Information [Line Items]
Cost of Shares Repurchased		$ 150.1
Number of Treasury Shares Repurchased		4,000,000	0
Repurchase Program Authorized in October 2021 [Member]
Stockholders Equity and Earnings Per Common Share Additional Information [Line Items]
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program							$ 250.0
Remaining Amount of Treasury Share Repurchases Authorized Under Stock Repurchase Program		$ 0.0
Repurchase Program Authorized in December 2022 [Member]
Stockholders Equity and Earnings Per Common Share Additional Information [Line Items]
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program						$ 200.0
Repurchase Program Authorized in February 2023 [Member] | Subsequent Event
Stockholders Equity and Earnings Per Common Share Additional Information [Line Items]
Authorized Amount of Treasury Share Repurchases Under Stock Repurchase Program					$ 250.0

[1] Includes commissions of $0.1 million for the year ended December 31, 2022.

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Stock-Based Compensation - Valuation Assumptions on PSU Grants (Details) - Performance Share Units	12 Months Ended
	Dec. 31, 2020 Rate
Share-based Compensation Arrangement by Share-based Payment Award
Expected Volatility Rate	23.00%
Expected Life	3 years
Risk Free Interest Rate	0.85%

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Stock-Based Compensation - Activity for CIUs (Details) - Cash Incentive Units (CIUs) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Share-based Compensation Arrangement by Share-based Payment Award, Liability Instruments, Nonvested, Number of Shares
Shares Outstanding Beginning Balance	7,223
Shares Granted	8,024
Shares Outstanding Ending Balance	15,247	7,223
Weighted Average Grant Date Fair Value at Beginning of Period	$ 1.07
Weighted Average Grant Date Fair Value of Shares Granted	1.09	$ 1.07
Weighted Average Grant Date Fair Value at End of Period	$ 1.08	$ 1.07

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Stock-Based Compensation - Valuation Assumptions on CIU Grants (Details) - Cash Incentive Units (CIUs)	12 Months Ended
	Dec. 31, 2022 Rate	Dec. 31, 2021 Rate
Share-based Compensation Arrangement by Share-based Payment Award
Expected Volatility Rate	30.00%	50.00%
Expected Life	3 years	3 years
Risk Free Interest Rate	4.26%	0.71%

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Stock-Based Compensation - Nonvested Stock Awards Classified in Equity (Details) - Restricted Stock Units (RSUs) - $ / shares shares in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares
Shares Outstanding Beginning Balance	2,016
Shares Granted	1,323
Shares Vested	(1,018)
Shares Forfeited	(139)
Shares Outstanding Ending Balance	2,182	2,016
Weighted Average Grant Date Fair Value at Beginning of Period	$ 26.63
Weighted Average Grant Date Fair Value of Shares Granted	28.21	$ 27.02	$ 22.71
Weighted Average Grant Date Fair Value of Shares Vested	27.51
Weighted Average Grant Date Fair Value of Shares Forfeited	26.19
Weighted Average Grant Date Fair Value at End of Period	$ 27.20	$ 26.63

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Stock-Based Compensation - Activity for Cash-Settled RSUs (Details) - Cash Settled RSUs shares in Thousands	12 Months Ended
	Dec. 31, 2022 $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award, Liability Instruments, Nonvested, Number of Shares
Shares Outstanding Beginning Balance | shares	46
Shares Vested | shares	(23)
Shares Outstanding Ending Balance | shares	23
Weighted Average Grant Date Fair Value at Beginning of Period | $ / shares	$ 23.31
Weighted Average Grant Date Fair Value of Shares Vested | $ / shares	23.31
Weighted Average Grant Date Fair Value at End of Period | $ / shares	$ 23.31

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Stock-Based Compensation Expense (Details) - USD ($)	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense, Before Tax	$ 52,700,000	$ 35,400,000	$ 30,400,000
Allocated Share-based Compensation Expense, Net of Tax	47,300,000	31,100,000	26,100,000
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense, Before Tax	5,700,000	3,300,000	5,600,000
Cash Incentive Units (CIUs)
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense, Before Tax	12,800,000	3,200,000	0
Restricted Stock Units and Cash-Settled Awards
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense, Before Tax	32,700,000	25,500,000	23,900,000
Stock Success Units (SSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense, Before Tax	900,000	2,800,000	400,000
Other Awards
Share-based Compensation Arrangement by Share-based Payment Award
Allocated Share-based Compensation Expense, Before Tax	$ 600,000	$ 600,000	$ 500,000

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Stock-Based Compensation - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award
Fair Value of Options Vested	$ 0.0	$ 0.0	$ 0.0
Intrinsic Value of Options Exercised	0.0	0.1	0.1
Cash Received Under Share-based Payment Arrangements	$ 4.2	$ 3.8	$ 4.4
Stock Incentive Plan 2017
Share-based Compensation Arrangement by Share-based Payment Award
Number of Shares Authorized	17,000,000
Number of Shares for Each Full Value Award	1.76
Total Duration of the Stock Incentive Plan	8 years
Award Vesting Period	3 years
Stock Incentive Plan 2022
Share-based Compensation Arrangement by Share-based Payment Award
Number of Shares Authorized	6,800,000
Number of Shares for Each Full Value Award	1.00
Total Duration of the Stock Incentive Plan	10 years
Number of Shares Available for Grant	6,600,000
Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Weighted Average Grant Date Fair Value of Shares Granted	$ 40.67		$ 23.49
Shares Outstanding	0	308,000
Shares Granted	(75,000)
Award Vesting Period	3 years
Shares Forfeited	(2,000)
Shares Vested	(256,000)
Fair Value of Awards Vested During the Period	$ 4.2	$ 6.6	$ 6.5
Compensation Cost Not yet Recognized	$ 0.0
Weighted Average Grant Date Fair Value		$ 23.58
Weighted Average Grant Date Fair Value of Shares Vested	$ 16.29
Weighted Average Grant Date Fair Value of Shares Forfeited	23.58
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Weighted Average Grant Date Fair Value of Shares Granted	$ 28.21	$ 27.02	$ 22.71
Shares Outstanding	2,182,000	2,016,000
Shares Granted	1,323,000
Shares Forfeited	(139,000)
Shares Vested	(1,018,000)
Fair Value of Awards Vested During the Period	$ 28.0	$ 23.9	$ 25.1
Compensation Cost Not yet Recognized	$ 31.9
Period for Recognition of Compensation Cost Not Yet Recognized	9 months 18 days
Weighted Average Grant Date Fair Value	$ 27.20	$ 26.63
Weighted Average Grant Date Fair Value of Shares Vested	27.51
Weighted Average Grant Date Fair Value of Shares Forfeited	$ 26.19
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Stock Option Compensation Not yet Recognized	$ 0.0
Shares Exercisable	0
Stock Success Units (SSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Weighted Average Grant Date Fair Value of Shares Granted	$ 18.78	$ 18.78	$ 18.78
Shares Outstanding	208,000	208,000
Shares Granted	0	0
Award Vesting Period	6 years
Shares Forfeited	0
Shares Vested	0		0
Fair Value of Awards Vested During the Period		$ 1.9
Compensation Cost Not yet Recognized	$ 1.7
Period for Recognition of Compensation Cost Not Yet Recognized	1 year 2 months 12 days
Cash Settled RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Compensation Cost Not yet Recognized	$ 0.2
Period for Recognition of Compensation Cost Not Yet Recognized	1 month 6 days
Weighted Average Grant Date Fair Value of Shares Granted	$ 0	$ 22.94
Share-Based Compensation Arrangement by Share-Based Payment Award, Liability Instruments, Vested in Period, Fair Value	$ 0.7	$ 0.6
Cash Incentive Units (CIUs)
Share-based Compensation Arrangement by Share-based Payment Award
Award Vesting Period	3 years
Compensation Cost Not yet Recognized	$ 9.6
Period for Recognition of Compensation Cost Not Yet Recognized	1 year
Weighted Average Grant Date Fair Value of Shares Granted	$ 1.09	$ 1.07
Shares Granted	8,024,000
Minimum | Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of Stock-based Awards Possible to be Earned	40.00%
Minimum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Award Vesting Period	1 year
Minimum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Award Vesting Period	1 year
Minimum | Cash Settled RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Award Vesting Period	1 year
Minimum | Cash Incentive Units (CIUs)
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of Stock-based Awards Possible to be Earned	0.00%
Maximum | Performance Share Units
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of Stock-based Awards Possible to be Earned	180.00%
Maximum | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award
Award Vesting Period	3 years
Maximum | Stock Options
Share-based Compensation Arrangement by Share-based Payment Award
Award Vesting Period	3 years
Maximum | Cash Settled RSUs
Share-based Compensation Arrangement by Share-based Payment Award
Award Vesting Period	3 years
Maximum | Cash Incentive Units (CIUs)
Share-based Compensation Arrangement by Share-based Payment Award
Percentage of Stock-based Awards Possible to be Earned	200.00%

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Reinsurance - Premium Income Data (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance Disclosures [Abstract]
Direct Premium Income	$ 9,900.5	$ 9,742.8	$ 9,621.9
Reinsurance Assumed	78.7	90.6	94.1
Reinsurance Ceded	(355.8)	(352.4)	(337.9)
Premium Income	9,623.4	9,481.0	9,378.1
Ceded Benefits and Change in Reserves for Future Benefits	$ 1,034.6	$ 862.5	$ 628.8

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Reinsurance - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Mar. 31, 2021 USD ($)	Dec. 16, 2020 USD ($)	Dec. 31, 2019 USD ($)
Negative Ceding Commission		$ 18.2	$ 437.7
Net Realized Gain Related to the Transfer of Investments	$ (15.7)	76.7	1,199.1
Transaction Costs Related to Reinsurance Transaction	1,020.2	1,008.6	996.6
Reinsurance Recoverables, Incurred but Not Reported Claims	8,279.8	8,697.8	8,378.9			$ 2,246.8
Prepaid Reinsurance Premiums	$ 713.3	777.1
Income Taxes Receivable, Net Operating Loss, CARES Act			36.5
Number of companies that make up majority of reinsurance recoverable	9
Closed Block Individual Disability Reinsurance Transaction
Net Realized Gain Related to the Transfer of Investments		67.6	1,302.3
Increase in Benefits and Change in Reserves for Future Benefits		133.1	1,284.5
Transaction Costs Related to Reinsurance Transaction		6.2	21.0
Reinsurance Recoverables, Incurred but Not Reported Claims				$ 990.0	$ 6,141.5
Prepaid Reinsurance Premiums				43.1	815.7
Deposit Contracts, Assets				$ 5.0	$ 88.2
Amortization of Prepaid Reinsurance Premium	$ 63.8	$ 79.1	$ 2.6
AM Best A Rating or Better | Reinsurer Concentration Risk | Reinsurance Recoverable | Commonwealth Annuity and Life Insurance Company
Percentage of Concentration Risk	59.00%
AM Best A Rating or Better | Reinsurer Concentration Risk | Reinsurance Recoverable | Top 9 Reinsurers
Percentage of Concentration Risk	36.00%
AM Best, A- Rating | Reinsurer Concentration Risk | Reinsurance Recoverable | Other Reinsurers
Percentage of Concentration Risk	4.00%
AM Best, Below A- or Not Rated | Reinsurer Concentration Risk | Reinsurance Recoverable | Other Reinsurers
Percentage of Concentration Risk	1.00%

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Premium Income by Major Line of Business within Each Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information
Premium Income	$ 9,623.4	$ 9,481.0	$ 9,378.1
Accident, Sickness, and Disability
Segment Reporting Information
Premium Income	7,060.8	7,072.9	6,975.2
Life
Segment Reporting Information
Premium Income	2,562.6	2,408.1	2,402.9
Operating Segments
Segment Reporting Information
Premium Income	9,623.4	9,481.0	9,378.1
Operating Segments | Unum US
Segment Reporting Information
Premium Income	6,258.3	6,078.0	6,018.9
Operating Segments | Unum US | Group Long-term Disability
Segment Reporting Information
Premium Income	1,911.7	1,827.8	1,828.5
Operating Segments | Unum US | Group Short-term Disability
Segment Reporting Information
Premium Income	926.3	864.0	799.2
Operating Segments | Unum US | Group Life
Segment Reporting Information
Premium Income	1,669.1	1,641.9	1,640.5
Operating Segments | Unum US | Accidental Death & Dismemberment
Segment Reporting Information
Premium Income	173.7	165.1	163.9
Operating Segments | Unum US | Voluntary Benefits
Segment Reporting Information
Premium Income	840.6	846.7	875.2
Operating Segments | Unum US | Individual Disability
Segment Reporting Information
Premium Income	461.1	459.8	456.0
Operating Segments | Unum US | Dental and Vision
Segment Reporting Information
Premium Income	275.8	272.7	255.6
Operating Segments | Unum International
Segment Reporting Information
Premium Income	718.8	717.0	652.8
Operating Segments | Unum International | Group Long-term Disability
Segment Reporting Information
Premium Income	376.9	401.9	364.9
Operating Segments | Unum International | Group Life
Segment Reporting Information
Premium Income	138.2	112.3	108.5
Operating Segments | Unum International | Supplemental
Segment Reporting Information
Premium Income	114.0	112.6	99.8
Operating Segments | Unum International | Unum Poland
Segment Reporting Information
Premium Income	89.7	90.2	79.6
Operating Segments | Colonial Life
Segment Reporting Information
Premium Income	1,702.0	1,690.2	1,712.0
Operating Segments | Colonial Life | Accident, Sickness, and Disability
Segment Reporting Information
Premium Income	948.9	953.3	975.1
Operating Segments | Colonial Life | Life
Segment Reporting Information
Premium Income	401.1	384.7	376.4
Operating Segments | Colonial Life | Cancer and Critical Illness Colonial
Segment Reporting Information
Premium Income	352.0	352.2	360.5
Operating Segments | Closed Block
Segment Reporting Information
Premium Income	944.3	995.8	994.4
Operating Segments | Closed Block | Long-term Care
Segment Reporting Information
Premium Income	697.4	704.3	666.9
Operating Segments | Closed Block | Other Insurance Product Line
Segment Reporting Information
Premium Income	$ 246.9	$ 291.5	$ 327.5

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Selected Operating Statement Data by Segment (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information
Premium Income	$ 9,623.4	$ 9,481.0	$ 9,378.1
Net Investment Income	2,122.2	2,213.2	2,360.7
Other Income	261.1	242.9	224.2
Interest and Debt Expense	188.5	185.0	188.2
Operating Segments
Segment Reporting Information
Premium Income	9,623.4	9,481.0	9,378.1
Net Investment Income	2,122.2	2,213.2	2,360.7
Other Income	261.1	242.9	224.2
Adjusted Operating Revenue	12,006.7	11,937.1	11,963.0
Adjusted Operating Income (Loss)	1,555.9	1,116.6	1,278.0
Interest and Debt Expense	192.7	185.0	188.2
Depreciation and Amortization	701.4	703.1	722.3
Operating Segments | Unum US
Segment Reporting Information
Premium Income	6,258.3	6,078.0	6,018.9
Other Income	196.3	170.0	154.9
Adjusted Operating Revenue	7,130.9	6,969.6	6,894.1
Adjusted Operating Income (Loss)	970.7	464.9	825.4
Interest and Debt Expense	0.0	0.0	0.0
Depreciation and Amortization	370.6	400.9	421.7
Operating Segments | Unum International
Segment Reporting Information
Premium Income	718.8	717.0	652.8
Net Investment Income	170.1
Other Income	0.9	0.6	0.5
Adjusted Operating Revenue	889.8	850.3	757.9
Adjusted Operating Income (Loss)	127.0	105.7	76.6
Interest and Debt Expense	0.0	0.0	0.0
Depreciation and Amortization	22.0	21.0	20.1
Operating Segments | Colonial Life
Segment Reporting Information
Premium Income	1,702.0	1,690.2	1,712.0
Other Income	1.1	1.0	1.1
Adjusted Operating Revenue	1,855.8	1,863.2	1,868.8
Adjusted Operating Income (Loss)	374.6	329.2	335.4
Interest and Debt Expense	0.0	0.0	0.0
Depreciation and Amortization	303.5	275.4	273.9
Operating Segments | Closed Block
Segment Reporting Information
Premium Income	944.3	995.8	994.4
Other Income	58.0	65.1	66.6
Adjusted Operating Revenue	2,072.9	2,219.9	2,431.3
Adjusted Operating Income (Loss)	247.9	394.7	241.4
Interest and Debt Expense	0.0	0.0	3.1
Depreciation and Amortization	4.7	5.1	5.9
Operating Segments | Corporate and Other Segment
Segment Reporting Information
Premium Income	0.0	0.0	0.0
Other Income	4.8	6.2	1.1
Adjusted Operating Revenue	57.3	34.1	10.9
Adjusted Operating Income (Loss)	(164.3)	(177.9)	(200.8)
Interest and Debt Expense	192.7	185.0	185.1
Depreciation and Amortization	$ 0.6	$ 0.7	$ 0.7

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Segment Information Deferred Acquisition Costs by Segment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Movement Analysis of Deferred Policy Acquisition Costs
Deferred Acquisition Costs at Beginning of Year	$ 2,207.9
Deferred Policy Acquisition Costs, Amortization Expense	(591.0)	$ (586.1)	$ (606.1)
Deferred Acquisition Costs at End of Year	2,252.3	2,207.9
Operating Segments
Movement Analysis of Deferred Policy Acquisition Costs
Deferred Acquisition Costs at Beginning of Year	2,207.9	2,272.6	2,324.0
Deferral of Acquisition Costs	556.9	508.1	576.2
Deferred Policy Acquisition Costs, Amortization Expense	(591.0)	(586.1)	(606.1)
Adjustment Related to Unrealized Investment Gains and Losses	81.7	14.7	(22.4)
Deferred Policy Acquisition Costs Foreign Currency Translation Adjustment And Other	(3.2)	(1.4)	0.9
Deferred Acquisition Costs at End of Year	2,252.3	2,207.9	2,272.6
Operating Segments | Unum US
Movement Analysis of Deferred Policy Acquisition Costs
Deferred Acquisition Costs at Beginning of Year	1,096.2	1,168.7	1,223.0
Deferral of Acquisition Costs	273.1	242.7	291.5
Deferred Policy Acquisition Costs, Amortization Expense	(294.9)	(319.0)	(341.0)
Adjustment Related to Unrealized Investment Gains and Losses	15.0	3.8	(4.8)
Deferred Policy Acquisition Costs Foreign Currency Translation Adjustment And Other	0.0	0.0	0.0
Deferred Acquisition Costs at End of Year	1,089.4	1,096.2	1,168.7
Operating Segments | Unum International
Movement Analysis of Deferred Policy Acquisition Costs
Deferred Acquisition Costs at Beginning of Year	35.4	32.0	26.4
Deferral of Acquisition Costs	12.0	12.8	12.1
Deferred Policy Acquisition Costs, Amortization Expense	(7.6)	(8.0)	(7.4)
Adjustment Related to Unrealized Investment Gains and Losses	0.0	0.0	0.0
Deferred Policy Acquisition Costs Foreign Currency Translation Adjustment And Other	(3.2)	(1.4)	0.9
Deferred Acquisition Costs at End of Year	36.6	35.4	32.0
Operating Segments | Colonial Life
Movement Analysis of Deferred Policy Acquisition Costs
Deferred Acquisition Costs at Beginning of Year	1,076.3	1,071.9	1,074.6
Deferral of Acquisition Costs	271.8	252.6	272.6
Deferred Policy Acquisition Costs, Amortization Expense	(288.5)	(259.1)	(257.7)
Adjustment Related to Unrealized Investment Gains and Losses	66.7	10.9	(17.6)
Deferred Policy Acquisition Costs Foreign Currency Translation Adjustment And Other	0.0	0.0	0.0
Deferred Acquisition Costs at End of Year	$ 1,126.3	$ 1,076.3	$ 1,071.9

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Assets by Segment (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information
Total Assets	$ 61,434.9	$ 70,115.6
Operating Segments | Unum US
Segment Reporting Information
Total Assets	16,278.7	18,696.3
Operating Segments | Unum International
Segment Reporting Information
Total Assets	3,154.9	4,086.5
Operating Segments | Colonial Life
Segment Reporting Information
Total Assets	4,448.9	4,895.9
Operating Segments | Closed Block
Segment Reporting Information
Total Assets	34,241.2	38,287.9
Operating Segments | Corporate and Other Segment
Segment Reporting Information
Total Assets	$ 3,311.2	$ 4,149.0

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Reconciliation of Total Revenue and Income Before Income Tax to Operating Revenue and Operating Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting, Revenue Reconciling Item
Total Revenue	$ 11,991.0	$ 12,013.8	$ 13,162.1
Net Investment Gain (Loss)	(15.7)	76.7	1,199.1
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,631.4	1,063.0	964.0
Operating Lease, Impairment Loss		(13.9)	(12.7)
Closed Block Individual Disability Reinsurance Transaction
Segment Reporting, Revenue Reconciling Item
Net Investment Gain (Loss)		67.6	1,302.3
Amortization of the Cost of Reinsurance	(63.8)	(79.1)	(2.6)
Operating Segments
Segment Reporting, Revenue Reconciling Item
Total Revenue	11,991.0	12,013.8	13,162.1
Net Investment Gain (Loss)	(15.7)	76.7	1,199.1
Adjusted Operating Revenue	12,006.7	11,937.1	11,963.0
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest	1,631.4	1,063.0	964.0
Net Reserve Decrease Related to Reserve Assumption Updates, Before Tax	155.0	181.4	(169.0)
Capitalized Computer Software, Impairments	0.0	(12.1)	0.0
Costs Related to Early Retirement of Debt	0.0	(67.3)	0.0
Operating Lease, Impairment Loss	0.0	(13.9)	(12.7)
Costs Related to Organizational Design Update			(23.3)
Adjusted Operating Income	1,555.9	1,116.6	1,278.0
Operating Segments | Closed Block Individual Disability Reinsurance Transaction
Segment Reporting, Revenue Reconciling Item
Net Investment Gain (Loss)	0.0	67.6	1,302.3
Change in Benefit Reserves and Transaction Costs	0.0	139.3	1,305.5
Amortization of the Cost of Reinsurance	(63.8)	(79.1)	(2.6)
Operating Segments | Unrelated to Significant Transaction
Segment Reporting, Revenue Reconciling Item
Net Investment Gain (Loss)	$ (15.7)	$ 9.1	$ (103.2)

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Segment Information Segments - Additional Information (Detail) $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($) Integer	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Segment Reporting [Abstract]
Number of Operating Segments | Integer	3
Supplementary Insurance Information, by Segment
Goodwill	$ 347.6	$ 352.2
Operating Segments
Supplementary Insurance Information, by Segment
Capitalized Computer Software, Impairments	0.0	12.1	$ 0.0
Costs Related to Organizational Design Update			$ (23.3)
Unum US
Supplementary Insurance Information, by Segment
Goodwill	280.0	280.0
Unum International
Supplementary Insurance Information, by Segment
Goodwill	39.9	44.5
Colonial Life
Supplementary Insurance Information, by Segment
Goodwill	$ 27.7	$ 27.7

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Leases, Cost (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Leases [Abstract]
Operating Lease Cost	$ 19.6	$ 35.2	$ 48.6
Sublease Income	1.1	1.0	1.3
Total Lease Cost	18.5	34.2	47.3
Cash Paid for Amounts Included in the Measurement of Lease Liabilities	$ 23.1	$ 29.9	$ 30.8
Weighted-Average Remaining Lease Term	6 years	6 years	6 years
Weighted-Average Discount Rate	4.32%	4.45%	4.37%

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Lessee, Operating Lease, Liability, Payment, Due (Details) $ in Millions	Dec. 31, 2022 USD ($)
Leases [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	$ 18.2
Lessee, Operating Lease, Liability, Payments, Due Year Two	14.4
Lessee, Operating Lease, Liability, Payments, Due Year Three	11.1
Lessee, Operating Lease, Liability, Payments, Due Year Four	9.1
Lessee, Operating Lease, Liability, Payments, Due Year Five	8.3
Lessee, Operating Lease, Liability, Payments, Due after Year Five	17.4
Lessee, Operating Lease, Liability, Payments, Due	78.5
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	$ 10.6
Operating Lease, Liability	Other Liabilities

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Leases - Additional Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2022
Leases [Abstract]
Operating Lease, Impairment Loss	$ 13.9	$ 12.7
Operating Lease, Right-of-Use-Asset	Other Assets		Other Assets

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Statutory Permitted Practice Information (Detail) - Unum Life Insurance Company of America - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statutory Accounting Practices
Statutory Accounting Practices, Permitted Practice, Cumulative Amount	$ 1,191.0	$ 667.0	$ 229.0
Statutory Accounting Practices, Permitted Practice, Reserve Deficiency	$ 1,660.0	$ 2,310.0	$ 2,061.0

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Statutory Financial Information (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Traditional U.S. Life Insurance Subsidiaries
Statutory Accounting Practices
Statutory Net Income (Loss)	$ 965.4	$ 779.5	$ 646.8
Statutory Combined Net Gain (Loss) from Operations	965.4	681.1	726.2
Statutory Combined Capital and Surplus	3,816.3	3,950.3
Captive Reinsurers
Statutory Accounting Practices
Statutory Net Income (Loss)	(432.2)	(159.0)	(201.0)
Statutory Combined Net Gain (Loss) from Operations	(428.6)	(247.4)	$ (149.4)
Statutory Combined Capital and Surplus	$ 1,229.6	$ 1,258.4

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Statutory Financial Information - Additional Details (Detail) £ in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 GBP (£)	Dec. 31, 2020 USD ($)	Dec. 31, 2022 GBP (£)	Dec. 31, 2021 GBP (£)
Unum Life Insurance Company of America
Statutory Accounting Practices
Statutory Accounting Practices, Permitted Practice, Amount	$ 524.0	$ 438.0		$ 229.0
Fairwind Insurance Company
Statutory Accounting Practices
Statutory Accounting Practices, Permitted Practice, Amount	351.0	360.0
Unum Limited
Statutory Accounting Practices
Statutory Net Income | £			£ 121.8
Statutory Combined Capital and Surplus | £						£ 631.0
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments | £					£ 80.0
Traditional U.S. Life Insurance Subsidiaries
Statutory Accounting Practices
Statutory Net Income	965.4	779.5		$ 646.8
Statutory Combined Capital and Surplus	3,816.3	3,950.3
Statutory Accounting Practices, Statutory Amount Available for Dividend Payments	991.0
Cash and Securities Segregated under Federal and Other Regulations	$ 118.8	$ 117.7

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Schedule I - Summary of Investments, Other Than Investments in Related Parties Schedule I - Summary of Investments, Other Than Investments in Related Parties (Details) $ in Millions	Dec. 31, 2022 USD ($)
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	$ 46,452.1	[1]
Amount Shown on the Balance Sheet	43,712.3
Commercial Real Estate
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Amount Shown on the Balance Sheet	2,435.4
United States Government and Government Agencies and Authorities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	503.8	[1]
Fair Value of Investments	498.2
Amount Shown on the Balance Sheet	498.2
States, Municipalities, and Political Subdivisions
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	4,006.0	[1]
Fair Value of Investments	3,457.2
Amount Shown on the Balance Sheet	3,457.2
Foreign Governments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	908.1	[1]
Fair Value of Investments	827.1
Amount Shown on the Balance Sheet	827.1
Public Utilities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	5,170.9	[1]
Fair Value of Investments	4,956.9
Amount Shown on the Balance Sheet	4,956.9
Mortgage/Asset-backed Securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	592.1	[1]
Fair Value of Investments	573.3
Amount Shown on the Balance Sheet	573.3
All Other Corporate Bonds
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	26,640.3	[1]
Fair Value of Investments	24,524.6
Amount Shown on the Balance Sheet	24,524.6
Redeemable Preferred Stocks
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	4.0	[1]
Fair Value of Investments	3.5
Amount Shown on the Balance Sheet	3.5
Fixed Maturities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	37,825.2	[1]
Fair Value of Investments	34,840.8
Amount Shown on the Balance Sheet	34,840.8
Policy Loans
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	3,601.2	[1]
Amount Shown on the Balance Sheet	3,601.2
Derivatives
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	0.0	[1]
Amount Shown on the Balance Sheet	89.1	[2]
Perpetual Preferred Securities
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	23.1	[1]
Amount Shown on the Balance Sheet	25.8	[3]
Private Equity Partnerships
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	1,032.2
Amount Shown on the Balance Sheet	1,194.3	[3]
Miscellaneous Long-term Investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	130.9	[1]
Amount Shown on the Balance Sheet	130.9	[4]
Short-term Investments
SEC Schedule, 12-15, Insurance Companies, Summary of Investments, Other than Investments in Related Parties [Line Items]
Cost or Amortized Cost of Investments	1,394.8	[1]
Amount Shown on the Balance Sheet	$ 1,394.8

[1] The amortized cost for fixed maturity securities and mortgage loans represents original cost reduced by repayments, write-downs from declines in fair value, amortization of premiums, and/or accretion of discounts. The amortized cost for these investments does not include allowance for expected credit losses.

[2] Derivatives are carried at fair value.

[3] The difference between amortized cost and carrying value for private equity partnerships and perpetual preferred equity securities primarily results from changes in the partnership owner's equity and the security's market valuation since acquisition, respectively.

[4] The difference between amortized cost and carrying value for private equity partnerships and perpetual preferred equity securities primarily results from changes in the partnership owner's equity and the security's market valuation since acquisition, respectively.

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Parent Company Balance Sheet (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Balance Sheet Statements, Captions
Amortized Cost of Fixed Maturity Securities	$ 37,825.2	$ 37,386.7
Assets
Fixed Maturity Securities - at fair value (amortized cost: $748.1; $826.4)	34,840.8	43,336.0
Other Long-term Investments	1,440.1	1,203.0
Short-term Investments	1,394.8	1,388.0
Deferred Income Tax Assets, Net	449.8	0.0
Other Assets	1,786.3	1,825.6
Total Assets	61,434.9	70,115.6
Liabilities
Short-term debt	2.0	0.0
Long-term Debt	3,427.8	3,442.2
Other Liabilities	2,334.4	2,585.9
Total Liabilities	52,237.4	58,699.2
Stockholders' Equity
Common Stock	30.8	30.7
Additional Paid-in Capital	2,441.0	2,408.1
Accumulated Other Comprehensive Income	(2,756.6)	354.1
Retained Earnings	12,912.1	11,853.2
Treasury Stock	(3,429.8)	(3,229.7)
Total Stockholders' Equity	9,197.5	11,416.4	$ 10,871.0
Total Liabilities and Stockholders' Equity	61,434.9	70,115.6
Parent Company
Condensed Balance Sheet Statements, Captions
Amortized Cost of Fixed Maturity Securities	748.1	826.4
Assets
Fixed Maturity Securities - at fair value (amortized cost: $748.1; $826.4)	657.7	820.8
Other Long-term Investments	19.3	10.3
Short-term Investments	845.8	629.5
Investments in Subsidiaries	11,278.2	13,711.1
Deferred Income Tax Assets, Net	114.9	144.5
Other Assets	555.5	508.1
Total Assets	13,471.4	15,824.3
Liabilities
Short-term debt	2.0	0.0
Long-term Debt	3,427.8	3,442.2
Pension and Postretirement Benefits	352.6	507.1
Other Liabilities	491.5	458.6
Total Liabilities	4,273.9	4,407.9
Stockholders' Equity
Common Stock	30.8	30.7
Additional Paid-in Capital	2,441.0	2,408.1
Accumulated Other Comprehensive Income	(2,756.6)	354.1
Retained Earnings	12,912.1	11,853.2
Treasury Stock	(3,429.8)	(3,229.7)
Total Stockholders' Equity	9,197.5	11,416.4
Total Liabilities and Stockholders' Equity	$ 13,471.4	$ 15,824.3

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Parent Company Balance Sheet Captions (Detail) - $ / shares	Dec. 31, 2022	Dec. 31, 2021
Stockholders' Equity
Common Stock, Par Value (in dollars per share)	$ 0.10	$ 0.10
Common Stock, Shares Authorized	725,000,000	725,000,000
Common Stock, Shares Issued	308,306,490	307,334,853
Treasury Stock, Shares at Cost	110,551,977	104,820,670

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Parent Company Statement of Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Income Statements, Captions
Other Income	$ 261.1	$ 242.9	$ 224.2
Total Revenue	11,991.0	12,013.8	13,162.1
Cost Related to Early Retirement of Debt	4.2	67.3	0.0
Income Tax Expense (Benefit)	317.2	238.8	171.0
Net Income	1,314.2	824.2	793.0
Other Comprehensive Income (Loss), Net of Tax	(3,110.7)	(20.1)	336.9
Comprehensive Income (Loss)	(1,796.5)	804.1	1,129.9
Parent Company
Condensed Income Statements, Captions
Other Income	81.8	53.5	51.7
Total Revenue	1,411.4	1,682.9	1,026.3
Interest and Debt Expense	188.5	185.9	187.1
Cost Related to Early Retirement of Debt	4.2	67.3	0.0
Other Expenses	35.6	39.1	51.1
Operating Expenses, Total	228.3	292.3	238.2
Income Before Income Tax	1,183.1	1,390.6	788.1
Income Tax Expense (Benefit)	14.7	(24.1)	(15.3)
Income of Parent Company	1,168.4	1,414.7	803.4
Equity in Undistributed Earnings (Loss) of Subsidiaries	145.8	(590.5)	(10.4)
Net Income	1,314.2	824.2	793.0
Other Comprehensive Income (Loss), Net of Tax	(3,110.7)	(20.1)	336.9
Comprehensive Income (Loss)	(1,796.5)	804.1	1,129.9
Parent Company | Cash Dividend
Condensed Income Statements, Captions
Dividends from Subsidiaries	1,306.6	909.8	974.6
Parent Company | Non-Cash Dividend
Condensed Income Statements, Captions
Dividends from Subsidiaries	$ 23.0	$ 719.6	$ 0.0

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Parent Company Cash Flow Statement (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Condensed Cash Flow Statements, Captions
Cash Provided by Operating Activities	$ 1,418.7	$ 1,387.5	$ 469.3
Cash Flows from Investing Activities
Proceeds from Maturities of Fixed Maturity Securities	1,532.5	2,611.4	2,052.4
Proceeds from Sales and Maturities of Other Investments	445.9	403.1	237.0
Purchase of Fixed Maturity Securities	(2,835.3)	(4,106.3)	(3,169.6)
Purchase of Other Investments	(482.9)	(606.8)	(440.6)
Net Sales (Purchases) of Short-term Investments	(22.6)	76.5	(133.1)
Net Purchases of Property and Equipment	(102.2)	(110.3)	(119.1)
Cash Used by Investing Activities	(955.9)	(1,340.6)	(267.7)
Cash Flows from Financing Activities
Short-term Debt Repayment	0.0	0.0	(400.0)
Issuance of Long-term Debt	349.2	588.1	494.1
Long-term Debt Repayment	(364.0)	(500.0)	(80.0)
Cost Related to Early Retirement of Debt	3.6	62.8	0.0
Issuance of Common Stock	4.0	3.4	4.4
Repurchase of Common Stock	(200.1)	(50.0)	0.0
Dividends Paid to Stockholders	(254.2)	(239.4)	(231.9)
Other, Net	(2.9)	4.0	(1.5)
Cash Used by Financing Activities	(418.6)	(168.9)	(88.7)
Net Increase (Decrease) in Cash and Bank Deposits	44.2	(122.0)	112.9
Parent Company
Condensed Cash Flow Statements, Captions
Cash Provided by Operating Activities	1,250.2	861.0	964.0
Cash Flows from Investing Activities
Proceeds from Maturities of Fixed Maturity Securities	192.1	245.5	138.8
Proceeds from Sales and Maturities of Other Investments	7.4	20.1	46.6
Purchase of Fixed Maturity Securities	(102.7)	(2.0)	(384.7)
Purchase of Other Investments	(32.0)	(0.9)	(22.0)
Net Sales (Purchases) of Short-term Investments	(209.6)	(465.0)	440.6
Cash Distributions to Subsidiaries	(540.2)	(300.9)	(965.5)
Net Purchases of Property and Equipment	(94.0)	(91.3)	(81.6)
Cash Used by Investing Activities	(779.0)	(594.5)	(827.8)
Cash Flows from Financing Activities
Short-term Debt Repayment	0.0	0.0	(400.0)
Issuance of Long-term Debt	349.2	588.1	494.1
Long-term Debt Repayment	(364.0)	(500.0)	0.0
Cost Related to Early Retirement of Debt	3.6	62.8	0.0
Issuance of Common Stock	4.0	3.4	4.4
Repurchase of Common Stock	(200.1)	(50.0)	0.0
Dividends Paid to Stockholders	(254.2)	(239.4)	(231.9)
Other, Net	0.7	(1.6)	(1.4)
Cash Used by Financing Activities	(468.0)	(262.3)	(134.8)
Net Increase (Decrease) in Cash and Bank Deposits	$ 3.2	$ 4.2	$ 1.4

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Schedule III Supplementary Insurance Information (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021		Dec. 31, 2020
Supplementary Insurance Information, by Segment
Deferred Acquisition Costs		$ 2,252.3		$ 2,207.9
Reserves for Future Policy Contract Benefits		42,330.2		48,007.5
Unearned Premiums		352.7		347.5
Policy and Contract Benefits		1,839.8		1,907.7
Premium Income		9,623.4		9,481.0		$ 9,378.1
Net Investment Income	[1]	2,122.2		2,213.2		2,360.7
Benefits and Change in Reserves for Future Benefits		6,936.7	[2]	7,598.6		8,972.9	[2]
Amortization of Deferred Acquisition Costs		591.0		586.1		606.1
All Other Expenses	[3]	2,831.9		2,766.1		2,619.1
Unum US
Supplementary Insurance Information, by Segment
Deferred Acquisition Costs		1,089.4		1,096.2
Reserves for Future Policy Contract Benefits		9,129.9		10,959.4
Unearned Premiums		50.5		41.5
Policy and Contract Benefits		1,245.8		1,262.5
Premium Income		6,258.3		6,078.0		6,018.9
Net Investment Income	[1]	676.3		721.6		720.3
Benefits and Change in Reserves for Future Benefits		3,941.5	[2]	4,338.8	[2]	4,138.7
Amortization of Deferred Acquisition Costs		294.9		319.0		341.0
All Other Expenses		1,768.8		1,631.9		1,589.0
Premiums Written	[4]	4,335.7		4,168.9		4,088.6
Unum International
Supplementary Insurance Information, by Segment
Deferred Acquisition Costs		36.6		35.4
Reserves for Future Policy Contract Benefits		2,074.7		2,765.5
Unearned Premiums		130.4		131.8
Policy and Contract Benefits		165.2		171.2
Premium Income		718.8		717.0		652.8
Net Investment Income	[1]	170.1		132.7		104.6
Benefits and Change in Reserves for Future Benefits		564.8		556.2		500.9
Amortization of Deferred Acquisition Costs		7.6		8.0		7.4
All Other Expenses		190.4		180.4		173.0
Premiums Written	[4]	504.1		520.6		456.0
Colonial Life
Supplementary Insurance Information, by Segment
Deferred Acquisition Costs		1,126.3		1,076.3
Reserves for Future Policy Contract Benefits		2,750.2		2,730.1
Unearned Premiums		35.2		36.3
Policy and Contract Benefits		181.5		210.3
Premium Income		1,702.0		1,690.2		1,712.0
Net Investment Income	[1]	152.7		172.0		155.7
Benefits and Change in Reserves for Future Benefits		803.1		910.4		906.5
Amortization of Deferred Acquisition Costs		288.5		259.1		257.7
All Other Expenses		389.6		364.5		369.2
Premiums Written	[4]	1,221.8		1,223.3		1,252.4
Closed Block
Supplementary Insurance Information, by Segment
Deferred Acquisition Costs		0.0		0.0
Reserves for Future Policy Contract Benefits		28,375.4		31,552.5
Unearned Premiums		136.6		137.9
Policy and Contract Benefits		247.3		263.7
Premium Income		944.3		995.8		994.4
Net Investment Income	[1]	1,070.6		1,159.0		1,370.3
Benefits and Change in Reserves for Future Benefits		1,627.3		1,793.2	[2]	3,426.8	[2]
Amortization of Deferred Acquisition Costs		0.0		0.0		0.0
All Other Expenses		261.5		284.0		240.2
Premiums Written	[4]	936.8		983.0		979.3
Corporate and Other Segment
Supplementary Insurance Information, by Segment
Premium Income		0.0		0.0		0.0
Net Investment Income	[1]	52.5		27.9		9.8
Benefits and Change in Reserves for Future Benefits		0.0		0.0		0.0
Amortization of Deferred Acquisition Costs		0.0		0.0		0.0
All Other Expenses		221.6		305.3		247.7
Premiums Written	[4]	$ 0.0		$ 0.0		$ 0.0

[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.

[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.

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Schedule IV Reinsurance (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reinsurance Premiums for Insurance Companies, by Product Segment
Direct Premiums, Life Insurance in Force	$ 1,057,312.2	$ 1,007,562.2	$ 979,755.7
Ceded Premiums, Life Insurance in Force	35,773.9	37,794.6	41,550.9
Assumed Premiums, Life Insurance in Force	931.9	920.3	896.4
Premiums, Net, Life Insurance in Force	$ 1,022,470.2	$ 970,687.9	$ 939,101.2
Life Insurance in Force Premiums, Percentage Assumed to Net	0.10%	0.10%	0.10%
Gross Amount	$ 9,900.5	$ 9,742.8	$ 9,621.9
Reinsurance Ceded	355.8	352.4	337.9
Assumed Premiums Earned	78.7	90.6	94.1
Net Amount	$ 9,623.4	$ 9,481.0	$ 9,378.1
Percentage of Amount Assumed to Net	0.80%	1.00%	1.00%
Life Insurance
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross Amount	$ 2,711.2	$ 2,550.7	$ 2,536.8
Reinsurance Ceded	155.1	150.2	141.9
Assumed Premiums Earned	6.5	7.6	8.0
Net Amount	$ 2,562.6	$ 2,408.1	$ 2,402.9
Percentage of Amount Assumed to Net	0.30%	0.30%	0.30%
Accident, Health, and Other Insurance
Reinsurance Premiums for Insurance Companies, by Product Segment
Gross Amount	$ 7,189.3	$ 7,192.1	$ 7,085.1
Reinsurance Ceded	200.7	202.2	196.0
Assumed Premiums Earned	72.2	83.0	86.1
Net Amount	$ 7,060.8	$ 7,072.9	$ 6,975.2
Percentage of Amount Assumed to Net	1.00%	1.20%	1.20%

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Schedule V Valuation and Qualifying Accounts (Detail) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Allowance for expected credit losses (deducted from accounts and premiums receivable)
Valuation and Qualifying Accounts Disclosure
Balance at Beginning of Year		$ 34.2	$ 38.8
Additions Charged to Costs and Expenses		10.8	18.2	$ 34.2
Additions Charged to Other Accounts	[1]	0.0	0.0	0.1
Deductions	[2]	12.5	22.8	19.3
Balance at End of Year		32.5	34.2	38.8
Allowance for expected credit losses (deducted from accounts and premiums receivable) | Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjusted Balance
Valuation and Qualifying Accounts Disclosure
Balance at Beginning of Year	[3]			23.8
Allowance for expected credit losses (deducted from reinsurance recoverable)
Valuation and Qualifying Accounts Disclosure
Balance at Beginning of Year		2.3	11.7
Additions Charged to Costs and Expenses		0.0	0.7	10.1
Additions Charged to Other Accounts	[1]	0.0	0.0	0.0
Deductions	[2]	0.6	10.1	0.2
Balance at End of Year		$ 1.7	2.3	11.7
Allowance for expected credit losses (deducted from reinsurance recoverable) | Accounting Standards Update 2016-13 | Cumulative Effect, Period of Adoption, Adjusted Balance
Valuation and Qualifying Accounts Disclosure
Balance at Beginning of Year	[3]			1.8
Real Estate reserve (deducted from other long-term investments)
Valuation and Qualifying Accounts Disclosure
Balance at Beginning of Year			$ 0.0	0.3
Additions Charged to Costs and Expenses				0.0
Additions Charged to Other Accounts	[1]			0.0
Deductions	[2]			0.3
Balance at End of Year				$ 0.0

[1] Additions charged to other accounts are comprised of amounts related to fluctuations in the foreign currency exchange rate.

[2] Deductions include amounts deemed to reduce exposure of expected losses on premium and accounts receivables and reinsurance recoverable, probable losses on Real Estate reserve, amounts deemed uncollectible, and amounts related to fluctuations in the foreign currency exchange rate.

[3] In 2020, ASC 326 "Financial Instruments - Credit Losses" was adopted resulting in a beginning balance adjustment of $13.5 million to increase the Allowance for expected credit losses (deducted from accounts and premiums receivable) and a $1.8 million beginning balance adjustment to increase the Allowance for expected credit losses (deducted from reinsurance recoverable).