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UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 10-K
FORM 10-K
ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 20192020
OR
TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934
For the Transition Period from             to
Commission File No. 1-11778
CHUBB LIMITED
(Exact name of registrant as specified in its charter)
Switzerland98-0091805
(State or other jurisdiction of incorporation or organization)(I.R.S. Employer Identification No.)
Baerengasse 32
Zurich, Switzerland CH-8001
(Address of principal executive offices) (Zip Code)
+41 (0)43 456 76 00
(Registrant’s telephone number, including area code)
Securities registered pursuant to Section 12(b) of the Act:
Title of each classTrading Symbol(s)
Name of each exchange

on which registered
Common Shares, par value CHF 24.15 per shareCBNew York Stock Exchange
Guarantee of Chubb INA Holdings Inc. 0.30% Senior Notes due 2024CB/24ANew York Stock Exchange
Guarantee of Chubb INA Holdings Inc. 0.875% Senior Notes due 2027CB/27New York Stock Exchange
Guarantee of Chubb INA Holdings Inc. 1.55% Senior Notes due 2028CB/28New York Stock Exchange
Guarantee of Chubb INA Holdings Inc. 0.875% Senior Notes due 2029CB/29ANew York Stock Exchange
Guarantee of Chubb INA Holdings Inc. 1.40% Senior Notes due 2031CB/31New York Stock Exchange
Guarantee of Chubb INA Holdings Inc. 2.50% Senior Notes due 2038CB/38ANew 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 ☑ 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 ☑
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 ☑ 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 ☑ No ☐
Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a 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.
Large accelerated filerAccelerated filer
Non-accelerated filerSmaller 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. ☑
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 voting stock held by non-affiliates as of June 28, 201930, 2020 (the last business day of the registrant's most recently completed second fiscal quarter), was approximately $67$57 billion. For the purposes of this computation, shares held by directors and officers of the registrant have been excluded. Such exclusion is not intended, nor shall it be deemed, to be an admission that such persons are affiliates of the registrant.
As of February 13, 202011, 2021, there were 451,907,796450,224,906 Common Shares par value CHF 24.15 of the registrant outstanding.
Documents Incorporated by Reference
Certain portions of the registrant's definitive proxy statement relating to its 20202021 Annual General Meeting of Shareholders are incorporated by reference into Part III of this report.




PART I



ITEM 1. Business
General

Chubb Limited is the Swiss-incorporated holding company of the Chubb Group of Companies. Chubb Limited, which is headquartered in Zurich, Switzerland, and its direct and indirect subsidiaries (collectively, the Chubb Group of Companies, Chubb, we, us, or our) are a global insurance and reinsurance organization, serving the needs of a diverse group of clients worldwide. At December 31, 2019,2020, we had total assets of $177$191 billion and shareholders’ equity of $55$59 billion. Chubb was incorporated in 1985 at which time it opened its first business office in Bermuda and continues to maintain operations in Bermuda. We have grown our business through increased premium volume, expansion of product offerings and geographic reach, and the acquisition of other companies to become a global property and casualty (P&C) leader.

During 2020, we completed the purchase of an additional 16.2 percent ownership interest in Huatai Insurance Group Co., Ltd. (Huatai Group) bringing our aggregate ownership interest from 30.9 percent to 47.1 percent as of December 31, 2020. On December 30, 2019, we acquired Banchile Seguros de Vida, an insurance company providing both life and property and casualty coverages in Chile. The results of Huatai Group and Banchile Seguros de Vida are included in the Overseas General Insurance and Life Insurance segments as appropriate, determined by the type of policy written. Refer to Note 2 to the Consolidated Financial Statements for additional information.

With operations in 54 countries and territories, Chubb provides commercial and personal property and casualty insurance, personal accident and supplemental health insurance (A&H), reinsurance, and life insurance to a diverse group of clients. We offerprovide commercial insurance products and service offerings such as risk management programs, loss control, and engineering and complex claims management. We provide specialized insurance products ranging from Directors & Officers (D&O) and professional liability to various specialty-casualty and umbrella and excess casualty lines to niche areas such as aviation and energy. We also offer personal lines insurance coverage including homeowners, automobile, valuables, umbrella liability, and recreational marine products. In addition, we supply personal accident, supplemental health, and life insurance to individuals in select countries.

We serve multinational corporations, mid-size and small businesses with property and casualty insurance and risk engineering services; affluent and high net worth individuals with substantial assets to protect; individuals purchasing life, personal accident, supplemental health, homeowners, automobile, and specialty personal insurance coverage; companies and affinity groups providing or offering accident and health insurance programs and life insurance to their employees or members; and insurers managing exposures with reinsurance coverage.

At December 31, 2019, we employed approximately 33,000 people. We believe that employee relations are satisfactory.

We make available free of charge through our website (investors.chubb.com, under Financials) our annual report on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K, and amendments to those reports, if any, filed or furnished pursuant to Section 13(a) or 15(d) of the Exchange Act as soon as reasonably practicable after they have been electronically filed with or furnished to the U.S. Securities and Exchange Commission (SEC). Also available through our website (under Investor Relations / Corporate Governance) are our Corporate Governance Guidelines, Code of Conduct, and Charters for the Committees of the Board of Directors (the Board). Printed documents are available by contacting our Investor Relations Department (Telephone: +1 (212) 827-4445, E-mail: investorrelations@chubb.com).

We also use our website as a means of disclosing material, non-public information and for complying with our disclosure obligations under SEC Regulation FD (Fair Disclosure). Accordingly, investors should monitor the Investor Relations portion of our website, in addition to following our press releases, SEC filings, and public conference calls and webcasts. The information contained on, or that may be accessed through, our website is not incorporated by reference into, and is not a part of, this report. The SEC maintains an Internet site (www.sec.gov) that contains reports, proxy and information statements, and other information regarding issuers that file with the SEC.

Customers
For most commercial and personal lines of business we offer, insureds typically use the services of an insurance broker or agent. An insurance broker acts as an agent for the insureds, offering advice on the types and amount of insurance to purchase, and assists in the negotiation of price and terms and conditions. We obtain business from the local and major international insurance brokers and typically pay a commission to brokers for any business accepted and bound. Loss of all or a substantial portion of the business provided by one or more of these brokers could have a material adverse effect on our business. In our

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opinion, no material part of our business is dependent upon a single insured or group of insureds. We do not believe that the loss of any one insured would have a material adverse effect on our financial condition or results of operations, and no one insured or group of affiliated insureds account for as much as 10 percent of our total revenues.



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Competition
Competition in the insurance and reinsurance marketplace is substantial. We compete on an international and regional basis with major U.S., Bermuda, European, and other international insurers and reinsurers and with underwriting syndicates, some of which have greater financial, technological, marketing, distribution and management resources than we do. In addition, capital market participants have created alternative products that are intended to compete with reinsurance products. We also compete with new companies and existing companies that move into the insurance and reinsurance markets. Competitors include other stock companies, mutual companies, alternative risk sharing groups (such as group captives and catastrophe pools), and other underwriting organizations. Competitors sell through various distribution channels and business models, across a broad array of product lines, and with a high level of variation regarding geographic, marketing, and customer segmentation. We compete for business not only on the basis of price but also on the basis of availability of coverage desired by customers and quality of service.

The insurance industry is changing rapidly. Our ability to compete is dependent on a number of factors, particularly our ability to maintain the appropriate financial strength ratings as assigned by independent rating agencies and effectively utilize new technology in our business. Our broad market capabilities in personal, commercial, specialty, and A&H lines made available by our underwriting expertise, business infrastructure, and global presence, help define our competitive advantage. Our strong balance sheet is attractive to businesses, and our strong capital position and global platform affords us opportunities for growth not available to smaller, less diversified insurance companies. Refer to “Segment Information” for competitive environment by segment.

Trademarks and Trade Names
Various trademarks and trade names we use protect names of certain products and services we offer and are important to the extent they provide goodwill and name recognition in the insurance industry. We use commercially reasonable efforts to protect these proprietary rights, including various trade secret and trademark laws. We intend to retain material trademark rights in perpetuity, so long as it satisfies the use and registration requirements of applicable countries. One or more of the trademarks and trade names could be material to our ability to sell our products and services. We have taken appropriate steps to protect our ownership of key names, and we believe it is unlikely that anyone would be able to prevent us from using names in places or circumstances material to our operations.

Human Capital Management
Our employees are critical to our mission to protect the present and build a better future, by providing our customers with the security from risk that allows people and businesses to grow and prosper. To accomplish this mission, we seek to attract and retain the very best insurance professionals and to provide an inclusive and supportive culture that allows all of our employees to reach their full potential as we deliver insurance solutions and claims service for individuals, families and businesses of all sizes. Our highly collaborative, inclusive approach helps us drive better business outcomes. We track and report internally on key talent metrics including employee demographics, critical role succession planning, diversity data, and employee retention and engagement. This information is regularly reported to senior management as well as the Chubb Board of Directors. At December 31, 2020, we employed approximately 31,000 people in 54 countries and territories around the world, including 53 percent in North America, 12 percent in Europe, Eurasia and Africa, 19 percent in Asia, and 16 percent in Latin America. We believe that employee relations are good.

Diversity and inclusion
Diversity and inclusion are integral to Chubb’s culture. We recognize our responsibility to provide opportunity within our own organization, where we aim to foster a diverse and inclusive meritocracy. Our extensive efforts in this area include mentorships, affinity groups, diversity awareness training, and education, open dialogue on race and racism, management development programs, and considering a diverse pool of candidates in recruiting and promotion.

Examples of initiatives include Business Roundtables (our employee affinity groups) and Regional Inclusion Councils, which promote dynamic networking across the business and engage hundreds of employees in constructive dialogue. These circles of support focus on employee onboarding, development and retention and help us build stronger relationships with, and gain deeper insights into, our varied customer and distribution partner communities. Other programs include Chubb Start, which supports the continuous professional development of women who are early in their careers, and Chubb Signatures, a global and regional lecture series for successful senior women, diverse men and inclusion champions to share their unique backgrounds,

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experiences and hard-earned lessons in business. In addition, we remain attuned to demographic shifts within our workforce and society to evaluate and update employee policies, procedures and systems that reflect this commitment. We depend on our culture of leadership accountability to continue progress in diversity and inclusion at Chubb.

Attraction, Development, and Retention
The foundation to Chubb’s long-term success is our disciplined approach to attracting, developing and retaining the next generation of insurance professional and leaders. We strive to be an inclusive meritocracy, where all employees regardless of race, gender or background can thrive. Learning and professional development are central to the Chubb culture, and we are committed to providing opportunities to evolve professionally. Our talent development efforts are for all employee levels and we expect our employees to own and drive their development by availing themselves of the structured and unstructured learning we offer, including on-the-job training, through personal interaction and involvement, or via online and classroom learning. Chubb has made substantial investments for a robust technical and leadership development environment and, where appropriate, fills open positions with internal sourcing of talent.

Compensation and Benefits
Chubb is committed to delivering competitive compensation and benefits to its employees worldwide as a means to attract and retain a highly qualified, experienced, talented and motivated workforce. We vary and adjust our offerings to support the human resources requirements of our business in markets around the world in which we operate. Additionally, we structure our compensation programs for leaders to include a mix of short- and long-term awards, with a focus on linking pay to Chubb's performance and the enhancement of shareholder value over the medium- and long-term.
Segment Information
Chubb operates through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance.

In 2019,2020, consolidated net premiums earned was $31,290 million.$33.1 billion. Additional financial information about our segments, including net premiums earned by geographic region, is included in Note 15 to the Consolidated Financial Statements.

North America Commercial P&C Insurance (41(42 percent of 20192020 Consolidated NPE)

Overview
The North America Commercial P&C Insurance segment comprises operations that provide P&C insurance and services to large, middle market, and small commercial businesses in the U.S., Canada, and Bermuda. This segment includes:
Major Accounts, the retail division focused on large institutional organizations and corporate companies
Commercial Insurance, which includes the retail division focused on middle market customers and small businesses
Westchester and Chubb Bermuda, our wholesale and specialty divisions

Products and Distribution
Major Accounts provides a broad array of commercial lines of products and services, including traditional and specialty P&C, A&H, and risk management, as well as consumer A&H products and services to large U.S. and Canadian-based institutional organizations and corporate companies. Major Accounts distributes its insurance products primarily through a limited number of retail brokers. In addition to using brokers, certain products are also distributed through general agents, independent agents, managing general agents (MGA), managing general underwriters, alliances, affinity groups, and direct marketing operations. Products and services offered include property, professional liability, cyber risk, excess casualty, workers’ compensation, general liability, automobile liability, commercial marine, surety, environmental, construction, medical risk, inland marine, A&H coverages, as well as claims and risk management products and services.


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The Major Accounts operations, which represented approximately 4041 percent of North America Commercial P&C Insurance’s net premiums earned in 2019,2020, are organized into the following distinct business units, each offering specialized products and services targeted at specific markets:
Chubb Global Casualty offers a range of customized risk management primary casualty products designed to help large insureds, including national accounts, address the significant costs of financing and managing risk for workers’ compensation, general liability and automobile liability coverages as well as offering casualty insurance solutions for commercial real estate. Chubb Global Casualty also provides products which insure specific global operating risks of U.S.-based multinational companies and include deductible programs, captive programs, and paid or incurred loss retrospective plans. Within Chubb Global Casualty, Chubb Alternative Risk Solutions Group underwrites contractual indemnification policies which provides prospective coverage for
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loss events within the insured’s policy retention levels and underwrites assumed loss portfolio transfer (LPT) contracts in which insured loss events have occurred prior to the inception of the contract.
Property provides products and services including primary, quota share and excess all-risk insurance, risk management programs and services, commercial, inland marine, and aerospace products.
Casualty Risk provides coverages including umbrella and excess liability, environmental risk, casualty programs for commercial construction related projects for companies and institutions, and medical risk specialty liability products for the healthcare industry.
Surety offers a wide variety of surety products and specializes in underwriting both commercial and contract bonds and has the capacity for bond issuance on an international basis.
Accident & Health (A&H) products include employee benefit plans, occupational accident, student accident, and worldwide travel accident and global medical programs. With respect to products that include supplemental medical and hospital indemnity coverages, we typically pay fixed amounts for claims and are therefore insulated from rising healthcare costs. A&H also provides specialty personal lines products, including credit card enhancement programs (identity theft, rental car collision damage waiver, trip travel, and purchase protection benefits) distributed through affinity groups.
Financial Lines provides management liability and professional liability (D&O and E&O), transactional risk and cyber risk products to public companies as well as to private and not for profit organizations.
ESIS Inc. (ESIS) is an in-house third-party claims administrator that performs claims management and risk control services for domestic and international organizations as well as for the North America Commercial P&C Insurance segment. ESIS services include comprehensive medical managed care; integrated disability services; pre-loss control and risk management; health, safety and environmental consulting; salvage and subrogation; and healthcare recovery services. The net results for ESIS are included in North America Commercial P&C Insurance’s administrative expenses.

The Commercial Insurance operations, which include Small Commercial, represented approximately 40 percent of North America Commercial P&C Insurance’s net premiums earned in 2019.2020. Commercial Insurance provides a broad range of P&C, financial lines, and A&H products targeted to U.S and Canadian-based middle market customers in a variety of industries, while the Small Commercial operations provide a broad range of property and casualty, workers' compensation, small commercial management and professional liability for small businesses based in the U.S.
Commercial Insurance products and services offered include traditional property and casualty lines of business, including Package, which combines property and general liability, workers' compensation, automobile, umbrella; financial lines of business, including professional liability, management liability and cyber risk coverage; and other lines including environmental, A&H, and international coverages. Commercial Insurance distributes its insurance products through a North American network of independent retail agents, and regional, multinational and digital brokers. Generally, our customers purchase insurance through a single retail agent or broker, do not employ a risk management department, and do not retain significant risk through self-insured retentions. The majority of our customers purchase a Package product or a portfolio of products, which is a collection of insurance offerings designed to cover various needs.
Small Commercial Insurance products and services offered include property and casualty lines of business, including a business owner policy which contains property and general liability; financial lines, including professional liability, management liability, cyber risk; and other lines including workers’ compensation, automobile liability, and international coverages. Products are generally offered through a North American network of independent agents and brokers, as well as eTraditional, which are digital platforms where we electronically quote, bind, and issue for agents and brokers. An example of this is the Chubb Marketplace.


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Wholesale and Specialty, which represented approximately 2019 percent of North America Commercial P&C Insurance’s net premiums earned in 2019,2020, comprises Westchester and Chubb Bermuda.
Westchester serves the market for business risks that tend to be hard to place or not easily covered by traditional policies due to unique or complex exposures and provides specialty products for property, casualty, environmental, professional liability, inland marine, product recall, small business, binding and program coverages in the U.S., Canada, and Bermuda. Products are offered through the wholesale distribution channel.
Chubb Bermuda provides commercial insurance products on an excess basis including excess liability, D&O, professional liability, property, and political risk, the latter being written by Sovereign Risk Insurance Ltd., a wholly-owned managing agent. Chubb Bermuda focuses on Fortune 1000 companies and targets risks that are generally low in frequency and high

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in severity. Products are offered primarily through the Bermuda offices of major, internationally recognized insurance brokers.

Competitive Environment
Major Accounts competes against a number of large, global carriers as well as regional competitors and other entities offering risk alternatives such as self-insured retentions and captive programs. The markets in which we compete are subject to significant cycles of fluctuating capacity and wide disparities in price adequacy. We pursue a specialist strategy and focus on market opportunities where we can compete effectively based on service levels and product design, while still achieving an adequate level of profitability. We also achieve a competitive advantage through Major Accounts’ innovative product offerings and our ability to provide multiple products to a single client due to our nationwide local presence. In addition, all our domestic commercial units are able to deliver global products and coverage to customers in concert with our Overseas General Insurance segment.

The Commercial Insurance operations compete against numerous insurance companies ranging from large national carriers to small and mid-size insurers who provide specialty coverages and standard P&C products. Recent competitive developments include the growth of new digital-based distribution models.

Westchester competes against a number of large, national carriers as well as regional competitors and other entities offering risk alternatives such as self-insured retentions and captive programs. Chubb Bermuda competes against international commercial carriers writing business on an excess of loss basis.

North America Personal P&C Insurance (15 percent of 20192020 Consolidated NPE)

Overview
The North America Personal P&C Insurance segment includes the business written by Chubb Personal Risk Services division, which includes high net worth personal lines business, with operations in the U.S. and Canada. This segment provides affluent and high net worth individuals and families with homeowners, automobile and collector cars, valuable articles (including fine arts), personal and excess liability, travel insurance, and recreational marine insurance and services. Our homeowners business, including valuable articles, represented 68 percent of North America Personal P&C Insurance’s net premiums earned in 2019.2020.

Products and Distribution
Chubb Personal Risk Services offers comprehensive personal insurance products and services to meet the evolving needs of high net worth families and individuals. Our seamless customer experience and superior coverage protect not only our clients’ most valuable possessions, but also their standard of living. Our target customers consist of high net worth consumers with insurance needs that typically extend beyond what mass market carriers can offer. These coverages are offered solely through independent regional agents and brokers.

Competitive Environment
Chubb Personal Risk Services competes against insurance companies of varying sizes that sell personal lines products through various distribution channels, including retail agents as well as online distribution channels. We achieve a competitive advantage through our ability to address the specific needs of high net worth families and individuals, to provide superior service to our customers, and to develop and deploy digital production and processes.



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North America Agricultural Insurance (6 percent of 20192020 Consolidated NPE)

Overview
The North America Agricultural Insurance segment comprises our U.S. and Canadian-based businesses that provide a variety of coverages including crop insurance, primarily Multiple Peril Crop Insurance (MPCI) and crop-hail insurance through Rain and Hail Insurance Service, Inc. (Rain and Hail) as well as farm and ranch and specialty P&C commercial insurance products and services through our Chubb Agribusiness unit.

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Products and Distribution
Rain and Hail provides comprehensive MPCI and crop-hail insurance coverages.

MPCI is federally subsidized crop protection from numerous causes of loss, including drought, excessive moisture, freeze, disease and more. The MPCI program is offered in conjunction with the U.S. Department of Agriculture. MPCI products include revenue protection (defined as providing both commodity price and yield coverages), yield protection, margin protection, prevented planting coverage and replant coverage. For additional information on our MPCI program, refer to “Crop Insurance” under Item 7.
Crop-Hail coverage provides crop protection from damage caused by hail and/or fire, with options in some markets for other perils such as wind or theft. Coverage is provided on an acre-by-acre basis and is available in the U.S. and in some parts of Canada. Crop-Hail can be used in conjunction with MPCI or other comprehensive coverages to offset the deductible and provide protection up to the actual cash value of the crop.

Chubb Agribusiness comprises Commercial Agribusiness and Farm and Ranch Agribusiness.

Commercial Agribusiness offers specialty P&C coverages for commercial companies that manufacture, process and distribute agricultural products. Commercial products and services include property, general liability for premises/operations and product liability, commercial automobile, workers' compensation, employment practices liability coverage, built-in coverage for premises pollution, cyber and information security, and product withdrawal.

Farm and Ranch Agribusiness offers an extensive line of coverages for farming operations from Hobby/Gentleman farms to complex corporate farms and equine services including personal use, boarding, and training. Coverages include farm and ranch structures, machinery and other equipment, automobile and other vehicle coverages, and livestock.

Competitive Environment
Rain and Hail primarily operates in a federally regulated program where all approved providers offer the same product forms and rates through independent and/or captive agents. We seek a competitive advantage through our ability to provide superior service to our customers, including the development of digital solutions. Chubb Agribusiness competes against both national and regional competitors offering specialty P&C insurance coverages to companies that manufacture, process, and distribute agricultural products.

Overseas General Insurance (28 percent of 20192020 Consolidated NPE)

Overview
The Overseas General Insurance segment comprises Chubb International and Chubb Global Markets (CGM). CGM, our London-based international specialty and excess and surplus lines business, includes Lloyd's of London (Lloyd's) Syndicate 2488, a wholly-owned Chubb syndicate supported by funds at Lloyd’s provided by Chubb Corporate Members. Syndicate 2488 has an underwriting capacity of £480£550 million for the Lloyd’s 20202021 account year. The syndicate is managed by Chubb’s Lloyd’s managing agency, Chubb Underwriting Agencies Limited.

Products and Distribution
Chubb International maintains a presence in every major insurance market in the world and is organized geographically along product lines as follows: Europe, Asia Pacific and Far East, Eurasia and Africa, and Latin America. Products offered include commercial P&C A&H,lines, including specialty coverages and services, and consumer lines, including A&H and personal lines insurance products and services.products. Chubb International's P&C business is generally written, on both a direct and assumed basis, through major international, regional, and local brokers and agents. Certain European branded products are also offered via an eTraditional digital-commerce platform, Chubb Online, that allowsplatforms, allowing agents and brokers to quote, bind, and issue specialty policies online. Asia Pacific also utilizes similar eTraditional platforms to quote, bind,


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and issue policies.at their convenience. Property insurance products include traditional commercial fire coverage, as well as energy industry-related, marine, construction, and other technical coverages. Principal casualty products are commercial primary and excess casualty, environmental, and general liability. A&H and other consumer lines products are distributed through brokers, agents, direct marketing programs, including thousands of telemarketers, and sponsor relationships. The A&H operations primarily offer personal accident and supplemental medical coverages including accidental death, business/holiday travel, specified disease, disability, medical and hospital indemnity, and income protection. We are not in the primary healthcare business. With respect to our supplemental medical and hospital indemnity products, we typically pay fixed amounts for claims and are therefore largely insulated from the direct impact of rising healthcare costs. Chubb International specialty coverages include D&O, professional indemnity, energy,cyber, surety, aviation, political risk, and specialty personal lines products. Chubb International'sInternational personal lines operations provide specialty a wide range of consumer lines

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products and services designed to meet the needs of specific target markets around the world. Products include high net worth homes, traditional homeowners, automobile, and include property damage, automobile, homeowners,specialty products that cover smart phones, spectacles and personal liability.cyber risk.

Chubb International’s presence in China also includes its 30.947.1 percent ownership interest in Huatai Insurance Group Company Limited (Huatai Group).Group. Huatai Group wholly owns Huatai Property & Casualty Insurance Co., Ltd. (Huatai P&C). Therefore, Chubb owns an approximately 30.947.1 percent indirect ownership interest in Huatai P&C, which provides a range of commercial and personal P&C products in China, including property, professional liability, product liability, employer liability, business interruption, marine cargo, personal accident and specialty risk. These products are marketed through a variety of distribution channels including over 200 licensed sales locations in 28 Chinese provinces. Chubb is in the process of increasing its ownership interest in Huatai Group.

CGM offers products through its parallel distribution network via two legal entities, Chubb European Group SE (CEG) and Chubb Underwriting Agencies Limited, managing agent of Syndicate 2488. CGM uses the Syndicate to underwrite P&C business on a global basis through Lloyd's worldwide licenses. CGM uses CEG to underwrite similar classes of business through its network of U.K. and European licenses, and in the U.S. where it is eligible to write excess and surplus lines business. Factors influencing the decision to place business with the Syndicate or CEG include licensing eligibilities, capitalization requirements, and client/broker preference. All business underwritten by CGM is accessed through registered brokers. The main lines of business include aviation, property, energy, professional lines, marine, financial lines, and political risk, and A&H.risk.

Competitive Environment
Chubb International's primary competitors include U.S.-based companies with global operations, as well as non-U.S. global carriers and indigenous companies in regional and local markets. For the A&H lines of business, locally based competitors also include financial institutions and bank owned insurance subsidiaries. Our international operations have the distinct advantage of being part of one of the few international insurance groups with a global network of licensed companies able to write policies on a locally admitted basis. The principal competitive factors that affect the international operations are underwriting expertise and pricing, relative operating efficiency, product differentiation, producer relations, and the quality of policyholder services. A competitive strength of our international operations is our global network and breadth of insurance programs, which assist individuals and business organizations to meet their risk management objectives, while also having a significant presence in all of the countries in which we operate, giving us the advantage of accessing local technical expertise and regulatory environments, understanding local markets and culture, accomplishing a spread of risk, and offering a global network to service multinational accounts.

CGM is one of the preeminent international specialty insurers in London and is an established lead underwriter on a significant portion of the risks it underwrites for all lines of business. All lines of business face competition, depending on the business class, from Lloyd's syndicates, the London market, and other major international insurers and reinsurers. Competition for international risks is also seen from domestic insurers in the country of origin of the insured. CGM differentiates itself from competitors through long standing experience in its product lines, its multiple insurance entities (Syndicate 2488 and CEG), and the quality of its underwriting and claims service.

Global Reinsurance (2 percent of 20192020 Consolidated NPE)

Overview
The Global Reinsurance segment represents Chubb's reinsurance operations comprising Chubb Tempest Re Bermuda, Chubb Tempest Re USA, Chubb Tempest Re International, and Chubb Tempest Re Canada. Global Reinsurance markets reinsurance products worldwide under the Chubb Tempest Re brand name and provides solutions for small to mid-sized clients and multinational ceding companies. Global Re offers a broad array of traditional and non-traditional (e.g., loss portfolio transfer) property and casualty products.


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Products and Distribution
Global Reinsurance services clients globally through its major units. Major international brokers submit business to one or more of these units' underwriting teams who have built strong relationships with both key brokers and clients by providing a responsive, client-focused approach to risk assessment and pricing. Global Reinsurance’s diversified portfolio is produced through reinsurance intermediaries.

Chubb Tempest Re Bermuda principally provides property catastrophe reinsurance globally to insurers of commercial and personal property. Property catastrophe reinsurance is on an occurrence or aggregate basis and protects a ceding company against an accumulation of losses covered by its issued insurance policies, arising from a common event or occurrence. Chubb Tempest Re Bermuda underwrites reinsurance principally on an excess of loss basis, meaning that its exposure only arises after the ceding

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company's accumulated losses have exceeded the attachment point of the reinsurance policy. Chubb Tempest Re Bermuda also writes other types of reinsurance on a limited basis for selected clients. Chubb Tempest Re Bermuda's business is produced through reinsurance intermediaries.

Chubb Tempest Re USA writes all lines of traditional and specialty P&C reinsurance for the North American market, principally on a treaty basis, with a focus on writing property per risk and casualty reinsurance. Chubb Tempest Re USA underwrites reinsurance on both a proportional and excess of loss basis. This unit's diversified portfolio is produced through reinsurance intermediaries.

Chubb Tempest Re International provides traditional and specialty P&C reinsurance to insurance companies worldwide, with emphasis on non-U.S. and Canadiannon-Canadian risks. Chubb Tempest Re International writes all lines of traditional and specialty reinsurance including property, risk, property catastrophe, casualty, marine, aviation, and specialty through our London- and Zurich-based offices. The London-based office of Chubb Tempest Re International focuses on the development of business sourced through London market brokers. The Zurich-based office focuses on providing reinsurance to continental European insurers via continental European brokers while also serving Asian and Latin American markets. The London- and Zurich-based offices write a diverse book of international business using Syndicate 2488, CEG, and Chubb Insurance (Switzerland) Limited. Chubb Tempest Re International underwrites reinsurance on both a proportional and excess of loss basis.

Chubb Tempest Re Canada offers a full array of traditional and specialty P&C, and reinsurance to the Canadian market, including casualty, property, risk, property catastrophe, surety, and crop hail. Chubb Tempest Re Canada provides coverage through its Canadian company platform and also offers clients access to Syndicate 2488.platform. Chubb Tempest Re Canada underwrites reinsurance on both a proportional and excess of loss basis.

Competitive Environment
The Global Reinsurance segment competes worldwide with major U.S. and non-U.S. reinsurers as well as reinsurance departments of numerous multi-line insurance organizations. In addition, capital markets participants have developed alternative capital sources intended to compete with traditional reinsurance. Additionally, government sponsored or backed catastrophe funds can affect demand for reinsurance. Global Reinsurance is considered a lead reinsurer and is typically involved in the negotiation and quotation of the terms and conditions of the majority of the contracts in which it participates. Global Reinsurance competes effectively in P&C markets worldwide because of itsChubb's strong capital position, analytical capabilities, experienced underwriting team and quality customer service. The key competitors in our markets vary by geographic region and product line. An advantage of our international platform is that we can change our mix of business in response to changes in competitive conditions in the territories in which we operate. Our geographic reach is also sought by multinational ceding companies since our offices, except for Bermuda, provide local reinsurance license capabilities which benefit our clients in dealing with country regulators.

Life Insurance (8(7 percent of 20192020 Consolidated NPE)

Overview
The Life Insurance segment comprises Chubb's international life operations (Chubb Life), Chubb Tempest Life Re (Chubb Life Re), and the North American supplemental A&H and life business of Combined Insurance.

Products and Distribution
Chubb Life provides individual life and group benefit insurance primarily in Asia, including Hong Kong, Indonesia, South Korea, Taiwan, Thailand, Vietnam, and Vietnam;Myanmar; throughout Latin America; selectively in Europe; Egypt; and in China through a non-consolidated joint venture insurance company.our direct and indirect investments in Huatai Group and Huatai Life Insurance Co., Ltd. (Huatai Life). Chubb Life offers a broad portfolio of protection and savings products including whole life, endowment plans, individual term life, group term life, medical and health, personal accident, credit life, universal life, Group Employee benefits, unit linked contracts, and credit protection insurance for automobile, motorcycle and home loans.


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The policies written by Chubb Life generally provide funds to beneficiaries of insureds after death and/or protection and/or savings benefits while the contract owner is living. Chubb Life sells to consumers through a variety of distribution channels including captive and independent agencies, bancassurance, worksite marketing, retailers, brokers, telemarketing, mobilassurance, and direct to consumer marketing. We continue to expand Chubb Life with a focus on opportunities in developing markets that we believe will result in strong and sustainable operating profits as well as a favorable return on capital commitments over time. Our dedicated captive agency distribution channel, whereby agents sell Chubb Life products exclusively, enables us to maintain direct contact with the individual consumer, promote quality sales practices, and exercise greater control over the future of the business. We have developed a substantial sales force of agents principally located in our Asia-Pacific countries. As of December 31, 2019,2020, Chubb had a 4557.5 percent direct and indirect ownership interest in Huatai Life, Insurance Co., Ltd. (Huatai Life), comprising a 20 percent direct ownership interest as well as a 2537.5 percent indirect ownership interest through Huatai Group, the parent company of Huatai Life. Huatai Life commenced operations in 2005 and has since grown to become one of the larger life insurance foreign joint ventures in China. Huatai Life offers a broad portfolio of insurance products including whole life, universal life, medical and health, personal accident and disability. These products are marketed through a variety of distribution channels including approximately 454 licensed sales locations in 20 Chinese provinces. Chubb is in the process of increasing its ownership interest in Huatai Group. We also have an indirect investment in Huatai Asset Management, a third-party investment management firm, through our direct ownership in Huatai Group.


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Chubb Life Re's core business is a Bermuda-based operation which provides reinsurance to primary life insurers, focusing on guarantees included in certain variable annuity products and also on more traditional mortality reinsurance protection. Chubb Life Re's U.S.-based traditional life reinsurance operation was discontinued for new business in January 2010. Since 2007, Chubb Life Re has not quoted on new opportunities in the variable annuity reinsurance marketplace and our focus has been on managing the current portfolio of risk, both in the aggregate and on a contract basis. This business is managed with a long-term perspective and short-term earningsnet income volatility is expected.

Combined Insurance distributes specialty supplemental A&H and life insurance products targeted to middle income consumers and businesses in the U.S. and Canada. Combined Insurance's substantial North American sales force distributes a wide range of supplemental accident and sickness insurance products, including personal accident, short-term disability, critical illness, Medicare supplement products, and hospital confinement/recovery. Most of these products are primarily fixed-indemnity benefit obligations and are not directly subject to escalating medical cost inflation.

Competitive Environment
Chubb Life's competition differs by location but generally includes multinational insurers, and in some locations, local insurers, joint ventures, or state-owned insurers. Chubb's financial strength and reputation as an entrepreneurial organization with a global presence gives Chubb Life a strong base from which to compete. While Chubb Life Re is not currently quoting on new opportunities in the variable annuity reinsurance marketplace, we continue to monitor developments in this market. Combined Insurance competes for A&H business in the U.S. against numerous A&H and life insurance companies across various industry segments.

Corporate

Corporate results primarily include results of all run-off asbestos and environmental (A&E) exposures, the results of our run-off Brandywine business, the results of Westchester specialty operations for 1996 and prior years, certain other run-off exposures, and income and expenses not attributable to reportable segments and the results of our non-insurance companies. The run-off operations do not actively sell insurance products, but are responsible for the management of existing policies and settlement of related claims.

Our exposure to A&E claims principally arises out of liabilities acquired when we purchased Westchester Specialty in 1998, CIGNA’s P&C business in 1999, and The Chubb Corporation in 2016. The A&E liabilities principally relate to claims arising from bodily-injury claims related to asbestos products and remediation costs associated with hazardous waste sites. 


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Underwriting
Chubb is an underwriting company and we strive to emphasize quality of underwriting rather than volume of business or market share. Our underwriting strategy is to manage risk by employing consistent, disciplined pricing and risk selection. This, coupled with writing a number of less cyclical product lines, has helped us develop flexibility and stability of our business, and has allowed us to maintain a profitable book of business throughout market cycles. Clearly defined underwriting authorities, standards, and guidelines coupled with a strong underwriting audit function are in place in each of our local operations and global profit centers. Global product boards ensure consistency of approach and the establishment of best practices throughout the world. Our priority is to help ensure adherence to criteria for risk selection by maintaining high levels of experience and expertise in our underwriting staff. In addition, we employ a business review structure that helps ensure control of risk quality and appropriate use of policy limits and terms and conditions. Underwriting discipline is at the heart of our operating philosophy.

Actuaries in each region work closely with the underwriting teams to provide additional expertise in the underwriting process. We use internal and external data together with sophisticated analytical, catastrophe loss and risk modeling techniques to ensure an appropriate understanding of risk, including diversification and correlation effects, across different product lines and territories. We recognize that climate changes and weather patterns are integral to our underwriting process and we continually adjust our process to address these changes. This is intended to help ensure that exposures are priced appropriately and resulting losses are contained within our risk tolerance and appetite for individual product lines, businesses, and Chubb as a whole. Our use of such tools and data also reflects an understanding of their inherent limitations and uncertainties.





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We also purchase protection from third parties, including, but not limited to, reinsurance as a tool to diversify risk and limit the net loss potential of catastrophes and large or unusually hazardous risks. For additional information refer to "Risk Factors" under Item 1A, “Reinsurance Protection”, below, “Catastrophe Management” and “Natural Catastrophe Property Reinsurance Program”, under Item 7, and Note 5 to the Consolidated Financial Statements, under Item 8.
Reinsurance Protection
As part of our risk management strategy, we purchase reinsurance protection to mitigate our exposure to losses, including certain catastrophes, to a level consistent with our risk appetite. Although reinsurance agreements contractually obligate our reinsurers to reimburse us for an agreed-upon portion of our gross paid losses, reinsurance does not discharge our primary liability to our insureds and, thus, we ultimately remain liable for the gross direct losses. In certain countries, reinsurer selection is limited by local laws or regulations. In most countries there is more freedom of choice, and the counterparty is selected based upon its financial strength, claims settlement record, management, line of business expertise, and its price for assuming the risk transferred. In support of this process, we maintain a Chubb authorized reinsurer list that stratifies these authorized reinsurers by classes of business and acceptable limits. This list is maintained by our Reinsurance Security Committee (RSC), a committee comprising senior management personnel and a dedicated reinsurer security team. Changes to the list are authorized by the RSC and recommended to the Chair of the Risk and Underwriting Committee. The reinsurers on the authorized list and potential new markets are regularly reviewed and the list may be modified following these reviews. In addition to the authorized list, there is a formal exception process that allows authorized reinsurance buyers to use reinsurers already on the authorized list for higher limits or different lines of business, for example, or other reinsurers not on the authorized list if their use is supported by compelling business reasons for a particular reinsurance program.

A separate policy and process exists for captive reinsurance companies. Generally, these reinsurance companies are established by our clients or our clients have an interest in them. It is generally our policy to obtain collateral equal to the expected losses that may be ceded to the captive. Where appropriate, exceptions to the collateral requirement are granted but only after senior management review. Specific collateral guidelines and an exception process are in place for the North America Commercial P&C Insurance, North America Personal P&C Insurance, and Overseas General Insurance segments, all of which have credit management units evaluating the captive's credit quality and that of their parent company. The credit management units, working with actuaries, determine reasonable exposure estimates (collateral calculations), ensure receipt of collateral in an acceptable form, and coordinate collateral adjustments as and when needed. Financial reviews and expected loss evaluations are performed annually for active captive accounts and as needed for run-off exposures. In addition to collateral, parental guarantees are often used to enhance the credit quality of the captive.

In general, we seek to place our reinsurance with highly rated companies with which we have a strong trading relationship. For additional information refer to “Catastrophe Management” and “Natural Catastrophe Property Reinsurance Program” under Item 7, and Note 5 to the Consolidated Financial Statements, under Item 8.



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Unpaid Losses and Loss Expenses
We establish reserves for unpaid losses and loss expenses, which are estimates of future payments on reported and unreported claims for losses and related expenses, with respect to insured events that have occurred. These reserves are recorded in Unpaid losses and loss expenses in the Consolidated balance sheets. The process of establishing loss and loss expense reserves for P&C claims can be complex and is subject to considerable uncertainty as it requires the use of informed estimates and judgments based on circumstances known at the date of accrual. These estimates and judgments are based on numerous factors, and may be revised as additional experience and other data become available and are reviewed, as new or improved methodologies are developed, or as laws change. Internal actuaries regularly analyze the levels of loss and loss expense reserves, taking into consideration factors that may impact the ultimate settlement value of the unpaid losses and loss expenses. These analyses could result in future changes in the estimates of loss and loss expense reserves or reinsurance recoverables and any such changes would be reflected in our results of operations in the period in which the estimates are changed. Losses and loss expenses are charged to income as incurred. The reserve for unpaid losses and loss expenses represents the estimated ultimate losses and loss expenses less paid losses and loss expenses, and comprises case reserves and incurred but not reported (IBNR) reserves. With the exception of certain structured settlements, for which the timing and amount of future claim payments are reliably determinable, and certain reserves for unsettled claims, our loss reserves are not discounted for the time value of money. In connection with such structured settlements and certain reserves for unsettled claims, we carried net discounted reserves of $74$68 million at December 31, 2019.2020.

For each product line, management, after consultation with internal actuaries, develops a “best estimate” of the ultimate settlement value of the unpaid losses and loss expenses that it believes provides a reasonable estimate of the required reserve. We evaluate our estimates of reserves quarterly in light of developing information. While we are unable at this time to determine

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whether additional reserves may be necessary in the future, we believe that our reserves for unpaid losses and loss expenses are adequate at December 31, 2019.2020. Future additions to reserves, if needed, could have a material adverse effect on our financial condition, results of operations, and cash flows. For additional information refer to “Critical Accounting Estimates – Unpaid losses and loss expenses”, under Item 7, and Note 7 to the Consolidated Financial Statements, under Item 8.
Investments
Our objective is to maximize investment income and total return while ensuring an appropriate level of liquidity, investment quality, and diversification. As such, Chubb's investment portfolio is invested primarily in investment-grade fixed-income securities as measured by the major rating agencies. We do not allow leverage in our investment portfolio.

The critical aspects of the investment process are controlled by Chubb Asset Management, an indirect wholly-owned subsidiary of Chubb. These aspects include asset allocation, portfolio and guideline design, risk management, and oversight of external asset managers. In this regard, Chubb Asset Management:

conducts formal asset allocation modeling for each of the Chubb subsidiaries, providing formal recommendations for the portfolio's structure;
establishes recommended investment guidelines that are appropriate to the prescribed asset allocation targets;
provides the analysis, evaluation, and selection of our external investment advisors;
establishes and develops investment-related analytics to enhance portfolio engineering and risk control;
monitors and aggregates the correlated risk of the overall investment portfolio; and
provides governance over the investment process for each of our operating companies to ensure consistency of approach and adherence to investment guidelines.

Under our guidance and direction, external asset managers conduct security and sector selection and transaction execution. Use of multiple managers benefits Chubb in several ways – it provides us with operational and cost efficiencies, diversity of styles and approaches, innovations in investment research and credit and risk management, all of which enhance the risk adjusted returns of our portfolios.

Chubb Asset Management determines the investment portfolio's allowable, targeted asset allocation and ranges for each of the segments. These asset allocation targets are derived from sophisticated asset and liability modeling that measures correlated histories of returns and volatility of returns. Allowable investment classes are further refined through analysis of our operating environment including expected volatility of cash flows, potential impact on our capital position, and regulatory and rating agency considerations.



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The Board has established a Risk & Finance Committee which helps execute the Board's supervisory responsibilities pertaining to enterprise risk management including investment risk. Under the overall supervision of the Risk & Finance Committee, Chubb's governance over investment management is rigorous and ongoing. Among its responsibilities, the Risk & Finance Committee of the Board:

reviews and approves asset allocation targets and investment policy to ensure that it is consistent with our overall goals, strategies, and objectives;
reviews and approves investment guidelines to ensure that appropriate levels of portfolio liquidity, credit quality, diversification, and volatility are maintained; and
systematically reviews the portfolio's exposures including any potential violations of investment guidelines.

We have long-standing global credit limits for our entire portfolio across the organization and for individual obligors. Exposures are aggregated, monitored, and actively managed by our Global Credit Committee, comprising senior executives, including our Chief Financial Officer, our Chief Risk Officer, our Chief Investment Officer, and our Treasurer.

Within the guidelines and asset allocation parameters established by the Risk & Finance Committee, individual investment committees of the segments determine tactical asset allocation. Additionally, these committees review all investment-related activity that affects their operating company, including the selection of outside investment advisors, proposed asset allocation changes, and the systematic review of investment guidelines.

For additional information regarding the investment portfolio, including breakdowns of the sector and maturity distributions, refer to Note 3 to the Consolidated Financial Statements under Item 8.


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Regulation
Our insurance and reinsurance subsidiaries conduct business globally, including in all 50 states of the United States, and the District of Columbia.Columbia and all U.S. Territories. Our business is subject to varying degrees of regulation and supervision in each of the jurisdictions in which our insurance and reinsurance subsidiaries are domiciled and on a group basis. The laws and regulations of the jurisdictions in which our insurance and reinsurance subsidiaries are domiciled require among other things that these subsidiaries maintain minimum levels of statutory capital, surplus, and liquidity, meet solvency standards, and submit to periodic examinations of their financial condition. The complex regulatory environments in which Chubb operates are subject to change and are regularly monitored.

Group Supervision
In 2012, the Pennsylvania Insurance Department (Department), in consultation with other insurance regulatory bodies that oversee Chubb's insurance activities, convened the first Chubb Supervisory College (College). Regulators from approximately ten jurisdictions attended the College in Philadelphia, Pennsylvania, during which the supervisors reviewed information on Chubb. The Department, in cooperation with the other supervisory college regulators, published a notice of its determination that it is the appropriate group-wide supervisor for Chubb.

Since 2012, the College has convened bi-annually in-person; and,primarily in-person, with the most recent College convened in September 2020, albeit virtually. In July 2017, the College convened its first interim regulators-only College teleconference, with the most recent teleconference held in September 2019. During these meetings, the College reviewed extensive information about Chubb, without material adverse comment. The nextGiven the virtual nature of the September 2020 College, another in-person College is tentatively scheduled for September 20202021 in Philadelphia, Pennsylvania.

The following is an overview of regulations for our operations in Switzerland, the U.S., Bermuda, and other international locations.

Swiss Operations
The Swiss Financial Market Supervisory Authority (FINMA) has the discretion to supervise Chubb on a group-wide basis. However, FINMA acknowledges the Department's assumption of group supervision over us.

In 2008, we formed Chubb Insurance (Switzerland) Limited which offers property and casualty insurance to Swiss companies, A&H insurance for individuals of Swiss Corporations as well as reinsurance predominantly in Continental Europe. We have also formed a reinsurance subsidiary named Chubb Reinsurance (Switzerland) Limited, which we operate as primarily a provider of reinsurance to Chubb entities. Both companies are licensed and governed by FINMA.


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U.S. Operations
Our U.S. insurance subsidiaries are subject to extensive regulation and supervision by the states in which they do business. The laws of the various states establish departments of insurance with broad authority to regulate, among other things: the standards of solvency that must be met and maintained, the licensing of insurers and their producers, approval of policy forms and rates, the nature of and limitations on investments, restrictions on the size of the risks which may be insured under a single policy, deposits of securities for the benefit of policyholders, requirements for the acceptability of reinsurers, periodic examinations of the affairs of insurance companies, the form and content of reports of financial condition required to be filed, and the adequacy of reserves for unearned premiums, losses, and other exposures.

Our U.S. insurance subsidiaries are required to file detailed annual and quarterly reports with state insurance regulators. In addition, our U.S. insurance subsidiaries' operations and financial records are subject to examination at regular intervals by state regulators.

All states have enacted legislation that regulates insurance holding companies. This legislation provides that each U.S. insurance company in the insurance holding company system (system) is required to register with the insurance department of its state of domicile and furnish information concerning the operations of companies within the system that may materially affect the operations, management, or financial condition of the insurers within the system.our U.S. insurers. We are required to file an annual enterprise risk report with the Department, identifying the material risks within our system that could pose enterprise risk to the insurance subsidiaries in the system.our U.S. insurers. All transactions within a system must be fair and equitable. Notice to the insurance departments is required prior to the consummation of transactions affecting the ownership or control of an insurer and of certain material transactions between an insurer and an entity in its system. In addition, certain transactions may not be consummated without the department's prior approval.

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We are also required to file an annual reportannually with the Department a disclosure report that identifies our corporate governance practices and a report reflecting our internal assessment of material risks associated with our current business plan and the sufficiency of our capital resources to support those risks.

Statutory surplus is an important measure used by the regulators and rating agencies to assess our U.S. insurance subsidiaries' ability to support business operations and provide dividend capacity. Our U.S. insurance subsidiaries are subject to various state statutory and regulatory restrictions that limit the amount of dividends that may be paid without prior approval from regulatory authorities. These restrictions differ by state, but are generally based on calculations incorporating statutory surplus, statutory net income, and/or investment income.

The National Association of Insurance Commissioners (NAIC) has a risk-based capital requirement for P&C insurance companies. This risk-based capital formula is used by many state regulatory authorities to identify insurance companies that may be undercapitalized and which merit further regulatory attention. These requirements are designed to monitor capital adequacy using a formula that prescribes a series of risk measurements to determine a minimum capital amount for an insurance company, based on the profile of the individual company. The ratio of a company's actual policyholder surplus to its minimum capital requirement will determine whether any state regulatory action is required. There are progressive risk-based capital failure levels that trigger more stringent regulatory action. If an insurer's policyholders' surplus falls below the Mandatory Control Level (70 percent of the Authorized Control Level, as defined by the NAIC), the relevant insurance commissioner is required to place the insurer under regulatory control.

However, an insurance regulator may allow a P&C company operating below the Mandatory Control Level that is writing no business and is running off its existing business to continue its run-off. Brandywine is running off its liabilities consistent with the terms of an order issued by the Insurance Commissioner of Pennsylvania. This includes periodic reporting obligations to the Department.

Government intervention continued in the insurance and reinsurance markets in relation to terrorism coverage in the U.S. (and through industry initiatives in other countries). The U.S. Terrorism Risk Insurance Act (TRIA), which was enacted in 2002 to ensure the availability of insurance coverage for certain types of terrorist acts in the U.S., was extended in December 2019 through December 31, 2027, and applies to certain of our operations.

From time to time, Chubb and its subsidiaries and affiliates receive inquiries from state agencies and attorneys general, with which we generally comply, seeking information concerning business practices, such as underwriting and non-traditional or loss mitigation insurance products. Moreover, many recent factors, such as consequences of and reactions to industry and economic conditions and focus on domestic issues, have contributed to the potential for change in the legal and regulatory framework


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applicable to Chubb's U.S. operations and businesses. We cannot assure that changes in laws or investigative or enforcement activities in the various states in the U.S. will not have a material adverse impact on our financial condition, results of operations, or business practices.

We are subject to numerous U.S. federal and state laws governing the protection of personal and confidential information of our clients or employees. These laws and regulations are increasing in complexity, and the requirements are extensive and detailed. Numerous states require us to certify our compliance with their data protection laws.

We are subject to the New York Department of Financial Services’ Cybersecurity Regulation (the NYDFS Cybersecurity Regulation) which mandates detailed cybersecurity standards for all institutions, including insurance entities, authorized by the NYDFS to operate in New York. Among the requirements are the maintenance of a cybersecurity program with governance controls, risk-based minimum data security standards for technology systems, cyber breach preparedness and response requirements, including reporting obligations, vendor oversight, training, and program record keeping and certification obligations. Because our North America systems are integrated, our companies domiciled in other states may also be impacted by this requirement.

Additionally, the NAIC adopted an Insurance Data Security Model Law, which requirerequires licensed insurance entities to comply with detailed information security requirements. The NAIC model law is similar in many respects to the NYDFS Cybersecurity Regulation.


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Bermuda Operations
The Insurance Act 1978 of Bermuda and related regulations, as amended (the Insurance Act), regulates the insurance business of our Bermuda domiciled (re)insurance subsidiaries (Bermuda domiciled subsidiaries) and provides that no person may carry on any insurance business in or from within Bermuda unless registered as an insurer by the Bermuda Monetary Authority (BMA). The Insurance Act imposes solvency and liquidity standards and auditing and reporting requirements on Bermuda insurance companies and grants the BMA powers to supervise, investigate, and intervene in the affairs of insurance companies.

Bermuda domiciled subsidiaries must prepare and file with the BMA, audited annual statutory financial statements and audited annual financial statements prepared in accordance with accounting principles generally accepted in the U.S. (GAAP), International Financial Reporting Standards (IFRS), or any such other generally accepted accounting principles as the BMA may recognize. TheseThe GAAP audited financial statements are made public by the BMA. The Insurance Act prescribes rules for the preparation and content of the statutory financial statements that require Bermuda domiciled subsidiaries to give detailed information and analyses regarding premiums, claims, reinsurance, and investments. In addition, each year, the Bermuda domiciled subsidiariesinsurers are required to prepare and publish a Financial Condition Report (FCR). The FCR provides details of measures governing the business operations, corporate governance framework, solvency and financial performance. The FCR must be filedfile with the BMA a capital and requires Bermuda insurance companies to makesolvency return along with an annual statutory financial return. The prescribed form of capital and solvency return is comprised of the FCR publicly available.

Bermuda’s regulatory regime provides a risk-basedBMA’s risk based capital model, termed the Bermuda Solvency Capital Requirement (BSCR), as or an approved internal capital model in lieu thereof; a statutory economic balance sheet; the approved actuary’s opinion; and several prescribed schedules. The BSCR is a tool to assist the BMA both in measuring risk and in determining appropriate levels of capitalization. The BSCR employs a standard mathematical model that correlates the risk underwritten by Bermuda insurers to their capital. The BSCR framework applies a standard measurement format to the risk associated with an insurer's assets, liabilities, and premiums, including a formula to take into account catastrophe risk exposure.

The BMA established risk-based regulatory capital adequacy and solvency margin requirements for Bermuda insurers that mandate that a Bermuda domiciled subsidiary’s Enhanced Capital Requirement (ECR) be calculated by either (a) BSCR, or (b) an internal capital model which the BMA has approved for use for this purpose. The Bermuda domiciled subsidiaries use the BSCR in calculating their solvency requirements. Bermuda statutory reporting rules include an Economic Balance Sheet (EBS) framework. The EBS framework is embedded as part of the BSCR and forms the basis of our ECR.

In order to minimize the risk of a shortfall in capital arising from an unexpected adverse deviation and in moving towards the implementation of a risk based capital approach, the BMA has established a threshold capital level, (termed the Target Capital Level (TCL)), set at 120 percent of ECR, that serves as an early warning tool for the BMA. Failure to maintain statutory capital at least equal to the TCL would likely result in increased BMA regulatory oversight.

Under the BMA’s powers to set standards on public disclosure under the Insurance Act, the Bermuda domiciled subsidiaries are required to prepare and publish a Financial Condition Report (FCR). The FCR provides details of measures governing the business operations, corporate governance framework, solvency and financial performance. The FCR must be filed with the BMA and requires Bermuda insurance companies to make the FCR publicly available.

Under the Insurance Act, Chubb's Bermuda domiciled subsidiaries are prohibited from declaring or paying any dividends of more than 25 percent of total statutory capital and surplus, as shown in its previous financial year unconsolidated statutory balance sheet, unless at least seven days before payment of the dividends, it files with the BMA an affidavit signed by at least two directors of the relevant Chubb Bermuda domiciled subsidiary (one of whom must be a director resident in Bermuda) and by the relevant Chubb Bermuda domiciled subsidiary’s principal representative, that it will continue


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to meet its required solvency margins. Furthermore, Bermuda domiciled subsidiaries may only declare and pay a dividend from retained earnings and a dividend or distribution from contributed surplus if it has no reasonable grounds for believing that it is, or would after the payment be, unable to pay its liabilities as they become due, or if the realizable value of its assets would be less than the aggregate of its liabilities and its issued share capital and share premium accounts.liabilities.

In addition, Chubb's Bermuda domiciled subsidiaries must obtain the BMA's prior approval before reducing total statutory capital, as shown in its previous financial year statutory balance sheet,year's financial statements, by 15 percent or more.


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Other International Operations
The extent of insurance regulation varies significantly among the countries in which non-U.S. Chubb operations conduct business. While each country imposes licensing, solvency, auditing, and financial reporting requirements, the type and extent of the requirements differ substantially. For example:
in some countries, insurers are required to prepare and file monthly and/or quarterly financial reports, and in others, only annual reports;
some regulators require intermediaries to be involved in the sale of insurance products, whereas other regulators permit direct sales contact between the insurer and the customer;
the extent of restrictions imposed upon an insurer's use of local and offshore reinsurance vary;
policy form filing and rate regulation vary by country;
the frequency of contact and periodic on-site examinations by insurance authorities differ by country; and
regulatory requirements relating to insurer dividend policies vary by country.

Significant variations can also be found in the size, structure, and resources of the local regulatory departments that oversee insurance activities. Certain regulators prefer close relationships with all subject insurers and others operate a risk-based approach.

Chubb operates in some countries through subsidiaries and in some countries through branches of subsidiaries. Local capital requirements applicable to a subsidiary generally include its branches. Certain Chubb companies are jointly owned with local companies to comply with legal requirements for local ownership. Other legal requirements include discretionary licensing procedures, compulsory cessions of reinsurance, local retention of funds and records, data privacy and protection program requirements such as the General Data Protection Regulation (GDPR), and foreign exchange controls. Chubb's international companies are also subject to multinational application of certain U.S. laws.

There are various regulatory bodies and initiatives that impact Chubb in multiple international jurisdictions and the potential for significant impact on Chubb could be heightened as a result of recent industry and economic developments.

In 2016, the United Kingdom (UK) voted in a national referendum to withdraw from the EU. In anticipation of the UK leaving the EU, effective January 1, 2019, we redomiciled the headquarters of our European carriers to Paris, France, which is also the principal office for our Continental European operations. Chubb continues to have a substantial presence in London in addition to its offices and operations across the UK and EU.

In 2018, the EU’s General Data Protection Regulation (GDPR) came into effect. The GDPR is a privacy regulation with protection for the personal data of EU residents on a global basis.

Enterprise Risk Management
As an insurer, Chubb is in the business of profitably managing risk for its customers. Since risk management must permeate an organization conducting a global insurance business, we have an established Enterprise Risk Management (ERM) framework that is integrated into management of our businesses and is led by Chubb's senior management. As a result, ERM is a part of the day-to-day management of Chubb and its operations.
Our global ERM framework is broadly multi-disciplinary and its strategic objectives include:

External Risks: identify, analyze, quantify, and where possible, mitigate significant external risks that could materially hamper the financial condition of Chubb and/or the achievement of corporate business objectives over the next 36 months;
Exposure Accumulations: identify and quantify the accumulation of exposure to individual counterparties, products or industry sectors, particularly those that materially extend across or correlate between business units or divisions and/or the balance sheet;
Risk Modeling: develop and use various data-sets, analytical tools, metrics and processes (such as economic capital models and advanced analytics, including catastrophe models to quantify natural catastrophe risk for product pricing, risk management, capital allocation and to simulate and estimate hurricane losses) that help business and corporate leaders make informed underwriting, portfolio management and risk management decisions within a consistent risk/reward framework;
Governance:
establish and coordinate risk guidelines that reflect the corporate appetite for risk;
monitor exposure accumulations relative to established guidelines; and
ensure effective internal risk management communication up to management and the Board, (including our Risk & Finance Committee and our Nominating & Governance Committee),down to the various business units and legal entities, and across the firm; and
Disclosure: develop protocols and processes for risk-related disclosure internally as well as externally to rating agencies, regulators, shareholders and analysts.: identify, analyze, quantify, and where possible, mitigate significant external risks that could materially hamper the financial condition of Chubb and/or the achievement of corporate business objectives over the next 36 months;


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Exposure Accumulations: identify and quantify the accumulation of exposure to individual counterparties, products or industry sectors, particularly those that materially extend across or correlate between business units or divisions and/or the balance sheet;
Risk Modeling: develop and use various data-sets, analytical tools, metrics and processes (including economic capital models and advanced analytics, including catastrophe models to quantify natural catastrophe risk for product pricing, risk management, capital allocation and to simulate and estimate hurricane losses) that help business and corporate leaders make informed underwriting, portfolio management and risk management decisions within a consistent risk/reward framework;
Governance:
establish and coordinate risk guidelines that reflect the corporate appetite for risk;
monitor exposure accumulations relative to established guidelines; and
ensure effective internal risk management communication up to management and the Board, (including our Risk & Finance Committee and our Nominating & Governance Committee),down to the various business units and legal entities, and across the firm; and
Disclosure: develop protocols and processes for risk-related disclosure internally as well as externally to rating agencies, regulators, shareholders and analysts.

Chubb Group's Risk and Underwriting Committee (RUC) reports to and assists the Chief Executive Officer in the oversight and review of the ERM framework which covers the processes and guidelines used to manage the entire landscape of insurance, risk, financial, risk, strategic, risk, and operational risk.risks. The RUC is chaired by Chubb Group’s Chief Risk Officer. The RUC meets at least monthly, and is comprised of Chubb Group's most senior executives which, in addition to the Chair, includingincludes the Chief Executive Officer, the President and Chief Operating Officer, Chief Financial Officer, Chief Investment Officer, Chief Actuary, Chief Claims Officer, General Counsel, President – North America Commercial and Personal Insurance, President – North America Major Accounts and Specialty Insurance, President – Overseas General Insurance, and Chief Underwriting Officer.

The RUC is assisted in its activities by Chubb's Enterprise Risk Unit (ERU) and Product Boards. The ERU is responsible for the collation and analysis of risk insight in two key areas. First,The first relates to external information that provides insight to the RUC on existing or emerging risks that might significantly impact Chubb's key objectives andwhile the second involves internal risk aggregations arising from Chubb's business writings and other activities such as investments and operations. The ERU is independent of the operating units and reports to our Chief Risk Officer. The Product Boards exist to provide oversight for products that we offer globally. A Product Board currently exists for each of Chubb's major product areas. Each Product Board is responsible for ensuring consistency in underwriting and pricing standards, identification of emerging issues, and guidelines for relevant accumulations.

Chubb's Chief Risk Officer also reports to the Board's Risk & Finance Committee, which helps execute the Board's supervisory responsibilities pertaining to ERM. The role of the Risk & Finance Committee includes evaluation of the integrity and effectiveness of our ERM procedures, systems, and information; governance on major policy decisions pertaining to risk aggregation and minimization; and assessment of our major decisions and preparedness levels pertaining to perceived material risks. The Audit Committee meets annually and on an as-needed basis with the Risk & Finance Committee at least annually in order to exercise its duties under New York Stock Exchange Rules.
Others within the overall ERM structure contribute toward accomplishing Chubb's ERM objectives, including regional management, Corporate Underwriting, Internal Audit, Compliance, external consultants, and managers of our internal control processes and procedures.

Tax Matters
Refer to “Risk Factors”, under Item 1A and Note 1 o)o) and Note 8 to the Consolidated Financial Statements, under Item 8.



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Information about our Executive Officers
NameAgePosition
Evan G. Greenberg6566Chairman, President, Chief Executive Officer, and Director
John W. Keogh5556Executive Vice ChairmanPresident and Chief Operating Officer
Philip V. Bancroft6061Executive Vice President and Chief Financial Officer
John J. Lupica5455Vice Chairman; President, North America Major Accounts & Specialty Insurance
Joseph F. Wayland6263Executive Vice President and General Counsel
Sean Ringsted5758Executive Vice President, Chief Digital Officer, and Chief Risk Officer
Timothy A. Boroughs7071Executive Vice President and Chief Investment Officer
Paul J. Krump6061Executive Vice President; President, North America CommercialChairman, Global Underwriting and Personal InsuranceClaims
Juan Luis Ortega4546Executive Vice President; President, Overseas General Insurance








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Evan G. Greenberg has been a director of Chubb Limited since August 2002. Mr. Greenberg was elected Chairman of the Board of Directors in May 2007. Mr. Greenberg was a director of The Coca-Cola Company from February 2011 until his resignation in October 2016. Mr. Greenberg was appointed to the position of President and Chief Executive Officer of Chubb Limited in May 2004, and in June 2003, was appointed President and Chief Operating Officer of Chubb Limited. Mr. Greenberg was appointed to the position of Chief Executive Officer of Chubb Overseas General in April 2002. He joined Chubb as Vice Chairman, Chubb Limited, and Chief Executive Officer of Chubb Tempest Re in November 2001. Prior to joining Chubb, Mr. Greenberg was most recently President and Chief Operating Officer of American International Group (AIG), a position he held from 1997 until 2000. Mr. Greenberg was a director of The Coca-Cola Company from February 2011 until October 2016.

John W. Keogh was appointed Executive Vice ChairmanPresident of Chubb Limited in November 2015. Mr. KeoghDecember 2020, and has served as Chief Operating Officer of Chubb Limited since July 2011 and Vice Chairman of Chubb Limited and Chubb Group Holdings since August 2010.2011. Mr. Keogh joined Chubb in 2006 as ChiefChairman, Insurance – Overseas General. Mr. Keogh was appointed Vice Chairman in 2010 and Executive Officer of Overseas General InsuranceVice Chairman in April 2006 and became Chairman of Overseas General Insurance in August 2010. Prior to2015. Before joining Chubb, Mr. Keogh served asheld a range of positions with increasing responsibility during a 20-year career with American International Group (AIG), including Senior Vice President, Domestic General Insurance, of AIG, and President and Chief Executive Officer of National Union Fire Insurance Company AIG'sof Pittsburgh, an AIG member company that specializes in D&O and fiduciary liability coverages. Mr. Keogh joinedcompany. He began his insurance career as an underwriter with AIG in 1986.  He served in a number of other senior positions there including as Executive Vice President of AIG's Domestic Brokerage Group and as President and Chief Operating Officer of AIG's Lexington Insurance Company unit.  

Philip V. Bancroft was appointed Chief Financial Officer of Chubb Limited in January 2002. For nearly 20 years, Mr. Bancroft worked for PricewaterhouseCoopers LLP. Prior to joining Chubb, he served as partner-in-charge of the New York Regional Insurance Practice. Mr. Bancroft had been a partner with PricewaterhouseCoopers LLP for ten years.

Mr. Bancroft plans to retire on July 1, 2021.

John J. Lupica was appointed President, North America Major Accounts & Specialty Insurance in January 2016,September 2020, and has served as Vice Chairman of Chubb Limited and Chubb Group Holdings insince November 20132013. Prior to his current role, Mr. Lupica served as President, North America Major Accounts and Specialty Insurance since January 2016. Mr. Lupica was appointed Chairman, Insurance - North America, in July 2011. Mr. Lupica had been Chief Operating Officer, Insurance - North America, since 2010 and President of ACE USA since 2006. He also previously served as Division President of U.S. Professional Risk business and U.S. Regional Operations. Mr. Lupica joined Chubbas Executive Vice President of Professional Risk in 2000. Prior to joining Chubb, he served as Senior Vice President for Munich-American Risk Partners, Inc. He also held various management positions at AIG.

Joseph F. Wayland was appointed Executive Vice President of Chubb Limited in January 2016, General Counsel and Secretary of Chubb Limited in July 2013. Mr. Wayland joined Chubb from the law firm of Simpson Thacher & Bartlett LLP, where he was a partner since 1994. From 2010 to 2012, he served in the United States Department of Justice, first as Deputy Assistant Attorney General of the Antitrust Division, and was later appointed as the Acting Assistant Attorney General in charge of that division.

Sean Ringsted was appointed Executive Vice President and Chief Digital Officer in February 2017 and Chief Risk Officer in November 2008. Mr. Ringsted previously served as Chief Actuary of Chubb Limited from November 2008 to January 2017. Mr. Ringsted’s previous roles at Chubb also include Chief Actuary for Chubb Group from 2004 to 2008, Executive Vice President and Chief Risk Officer for Chubb Tempest Re from 2002 to 2004, and Senior Vice President and Chief Actuary for Chubb Tempest Re from 1998 to 2002. Prior to joining Chubb, Mr. Ringsted was a consultant at Tillinghast-Towers Perrin.



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Timothy A. Boroughs was appointed Executive Vice President and Chief Investment Officer of Chubb Group in June 2000. Prior to joining Chubb, Mr. Boroughs was Director of Fixed Income at Tudor Investment Corporation from 1997 to 2000, and Managing Partner and Director of Global Leveraged Investment Activity at Fischer Francis Trees & Watts from 1976 to 1997.

Paul J. Krump was appointed Vice Chairman, Global Underwriting and Claims in September 2020. Prior to his current role, Mr. Krump served as Executive Vice President, Chubb Group and President North America Commercial and Personal Insurance insince January 2016. Prior toBefore Chubb Limited’s January 2016 acquisition of The Chubb Corporation, Mr. Krump was Chief Operating Officer of The Chubb Corporation, responsible for the company’s Commercial, Specialty, Personal and Accident & Health insurance lines; Claims; Global Field Operations; Information Technology; Human Resources; Communications; and External Affairs. Mr. Krump joined The Chubb Corporation in 1982 as a commercial underwriting trainee in the Minneapolis office. He held numerous headquarters and field positions in the United States and Europe, including President of Personal Lines and Claims and President of Commercial and Specialty Lines.
Juan Luis Ortega was appointed Executive Vice President, Chubb Group and President, Overseas General Insurance in August 2019. Mr. Ortega previously served as Senior Vice President, Chubb Group and Regional President of Latin America since 2016 and Regional President of Asia Pacific from 2013 to 2016. Mr. Ortega's previous roles at Chubb also include Senior Vice President, Accident & Health, for the Asia Pacific region from 2011 to 2013 and Senior Vice President and Regional Head of Accident & Health for the Latin America region from 2008 to 2010. Mr. Ortega joined Chubb in 1999 and advanced through a series of accident and health and credit insurance management positions in Miami, Puerto Rico and Mexico, before being named Country President of Chile in 2005.


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ITEM 1A. Risk Factors
Factors that could have a material impact on our results of operations or financial condition are outlined below. Additional risks not presently known to us or that we currently deem insignificant may also impair our business or results of operations as they become known or as facts and circumstances change. Any of the risks described below could result in a material adverse effect on our results of operations or financial condition.

Insurance

Our results of operations or financial condition could be adversely affected by the occurrence of natural and man-made disasters.
We have substantial exposure to losses resulting from natural disasters, man-made catastrophes such as terrorism or cyber-attack, and other catastrophic events, including pandemics. This could impact a variety of our businesses, including our commercial and personal lines, and life and accident and health (A&H) products. Catastrophes can be caused by various events, including hurricanes, typhoons, earthquakes, hailstorms, droughts, explosions, severe winter weather, fires, war, acts of terrorism, nuclear accidents, political instability, and other natural or man-made disasters, including a global or other wide-impact pandemic or a significant cyber-attack. The incidence and severity of catastrophes are inherently unpredictable and our losses from catastrophes could be substantial. In addition, climate change and resultingchanges in global temperatures, weather patterns, and sea levelsmay both increase the frequency and severity of natural catastrophes and the resulting losses in the future and impact our risk modeling assumptions.assumptions. We cannot predict the impact that changing climate conditions, if any, may have on our results of operations or our financial condition. Additionally, we cannot predict how legal, regulatory and/or social responses to concerns around global climate change may impact our business. The occurrence of claims from catastrophic events could result in substantial volatility in our results of operations or financial condition for any fiscal quarter or year. Although we attempt to manage our exposure to such events through the use of underwriting controls, risk models, and the purchase of third-party reinsurance, catastrophic events are inherently unpredictable and the actual nature of such events when they occur could be more frequent or severe than contemplated in our pricing and risk management expectations. As a result, the occurrence of one or more catastrophic events could have an adverse effect on our results of operations and financial condition.

COVID-19 pandemic, the effects of global actions taken to contain its spread, and its economic and societal impact could adversely impact our businesses, invested assets, financial condition, and results of operations.
COVID-19 pandemic (the “virus” or the “pandemic”) is causing significant disruption to public health, the global economy, financial markets, and commercial, social and community activity generally. The pandemic has had a significant effect on our company’s business operations and, depending on the course of the pandemic and government responses, may have a significant effect on current and future financial results. We may experience higher levels of loss and, claims activity in certain lines of business in excess of losses we have already recognized, and our premiums could also be adversely affected by any further suppression of global commercial activity that results in a reduction in insurable assets and other exposure. Financial conditions resulting from the pandemic may also have a negative effect on the value and quality of our portfolio of invested assets, thereby adversely affecting our investment returns and increasing our credit and related risk. Certain lines of our business, such as our variable annuity life reinsurance business, may require additional forms of collateral in the event of a decline in the securities and benchmarks to which those repayment mechanisms are linked.

To protect our employees and in response to the global and regional restrictions on interpersonal contact and travel because of the pandemic, much of our work force may be working remotely, either for extended periods or intermittently, in response to changing health and regulatory conditions, placing increased demands on our IT systems. While we have continued to conduct our business effectively throughout the pandemic, there is no assurance that our ability to continue to function in this environment will not be adversely affected by an extended disruption in the telecommunications and internet infrastructures that support our remote work capability.

If actual claims exceed our loss reserves, our financial results could be adversely affected.
Our results of operations and financial condition depend upon our ability to accurately assess the potential losses associated with the risks that we insure and reinsure. We establish reserves for unpaid losses and loss expenses, which are estimates of future payments of reported and unreported claims for losses and related expenses, with respect to insured events that have occurred at or prior to the balance sheet date. The process of establishing reserves can be highly complex and is subject to considerable variability as it requires the use of informed estimates and judgments.


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Actuarial staff in each of our segments regularly evaluates the levels of loss reserves. Any such evaluation could result in future changes in estimates of losses or reinsurance recoverables and would be reflected in our results of operations in the period in which the estimates are changed. Losses and loss expenses are charged to income as incurred. During the loss settlement period, which can be many years in duration for some of our lines of business, additional facts regarding individual claims and trends often will become known which may result in a change in overall reserves. In addition, application of statistical and actuarial methods may require the adjustment of overall reserves upward or downward from time to time.

Included in our loss reserves are liabilities for latent claims such as asbestos and environmental (A&E), which are principally related to claims arising from remediation costs associated with hazardous waste sites and bodily-injury claims related to exposure to asbestos products and environmental hazards. At December 31, 2019,2020, gross A&E liabilities represented approximately 3.22.8 percent of our gross loss reserves. The estimation of these liabilities is subject to many complex variables including: the current legal environment; specific settlements that may be used as precedents to settle future claims; assumptions regarding trends with respect to claim severity and the frequency of higher severity claims; assumptions regarding the ability to allocate liability among defendants (including bankruptcy trusts) and other insurers; the ability of a claimant to bring a claim in a state in which it has no residency or exposure; the ability of a policyholder to claim the right to non-products coverage; whether high-level excess policies have the potential to be accessed given the policyholder's claim trends and liability situation; payments to unimpaired claimants; and the potential liability of peripheral defendants. Accordingly, the ultimate settlement of losses, arising from either latent or non-latent causes, may be significantly greater or less than the loss and loss expense reserves held at the balance sheet date. In addition, the amount and timing of the settlement of our P&C liabilities are uncertain and our actual payments could be higher than contemplated in our loss reserves owing to the impact of insurance,


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judicial decisions, and/or social inflation. If our loss reserves are determined to be inadequate, we may be required to increase loss reserves at the time of the determination and our net income and capital may be reduced.

The effects of emerging claim and coverage issues on our business are uncertain.
As industry practices and legislative, regulatory, judicial, social, financial, technological and other environmental conditions change, unexpected and unintended issues related to claims and coverage may emerge. These issues may adversely affect our business by either extending coverage beyond our underwriting intent or by increasing the frequency and severity of claims. In some instances, these changes may not become apparent until after we have issued insurance or reinsurance contracts that are affected by the changes. For example, recently enacted "reviver" legislation in certain states does allow civil claims relating to molestation and abuse to be asserted against policyholders that would otherwise be barred by statutes of limitations. As a result, the full extent of liability under our insurance or reinsurance contracts may not be known for many years after issuance.

The failure of any of the loss limitation methods we use could have an adverse effect on our results of operations and financial condition.
We seek to manage our loss exposure by maintaining a disciplined underwriting process throughout our insurance operations. We also look to limit our loss exposure by writing a number of our insurance and reinsurance contracts on an excess of loss basis. Excess of loss insurance and reinsurance indemnifies the insured against losses in excess of a specified amount. In addition, we limit program size for each client and purchase third-party reinsurance for our own account. In the case of our assumed proportional reinsurance treaties, we seek per occurrence limitations or loss and loss expense ratio caps to limit the impact of losses ceded by the client. In proportional reinsurance, the reinsurer shares a proportional part of the premiums and losses of the reinsured. We also seek to limit our loss exposure by geographic diversification. Geographic zone limitations involve significant underwriting judgments, including the determination of the area of the zones and the inclusion of a particular policy within a particular zone's limits.

However, there are inherent limitations in all of these tactics and no assurance can be given against the possibility of an event or series of events that could result in loss levels that could have an adverse effect on our financial condition or results of operations. It is also possible that losses could manifest themselves in ways that we do not anticipate and that our risk mitigation strategies are not designed to address. Additionally, various provisions of our policies, such as limitations or exclusions from coverage or choice of forum negotiated to limit our risks, may not be enforceable in the manner we intend. As a result, one or more natural catastrophes and/or terrorism or other events could result in claims that substantially exceed our expectations, which could have an adverse effect on our results of operations and financial condition.

We may be unable to purchase reinsurance, and/or if we successfully purchase reinsurance, we are subject to the possibility of non-payment.
We purchase protection from third parties including, but not limited to, reinsurance to protect against catastrophes and other sources of volatility, to increase the amount of protection we can provide our clients, and as part of our overall risk management strategy. Our reinsurance business also purchases retrocessional protection which allows a reinsurer to cede to another company

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all or part of the reinsurance originally assumed by the reinsurer. A reinsurer's or retrocessionaire's insolvency or inability or unwillingness to make timely payments under the terms of its reinsurance agreement with us could have an adverse effect on us because we remain liable to the insured. From time to time, market conditions have limited, and in some cases have prevented, insurers and reinsurers from obtaining the types and amounts of reinsurance or retrocessional reinsurance that they consider adequate for their business needs.

There is no guarantee our desired amounts of reinsurance or retrocessional reinsurance will be available in the marketplace in the future. In addition to capacity risk, the remaining capacity may not be on terms we deem appropriate or acceptable or with companies with whom we want to do business. Finally, we face some degree of counterparty risk whenever we purchase reinsurance or retrocessional reinsurance. Consequently, the insolvency of these counterparties, or the inability, or unwillingness of any of our present or future reinsurers to make timely payments to us under the terms of our reinsurance or retrocessional agreements could have an adverse effect on us. At December 31, 2019,2020, we had $15.4$15.8 billion of reinsurance recoverables, net of reserves for uncollectible recoverables.

Certain active Chubb companies are primarily liable for A&E and other exposures they have reinsured to our inactive run-off company Century Indemnity Company (Century). At December 31, 2019,2020, the aggregate reinsurance balances ceded by our active subsidiaries to Century were approximately $1.5$1.6 billion. Should Century's loss reserves experience adverse development in the future and should Century be placed into rehabilitation or liquidation, the reinsurance recoverables due from Century to its affiliates would be payable only after the payment in full of third-party expenses and liabilities, including administrative expenses and direct policy liabilities. Thus, the intercompany reinsurance recoverables would be at risk to the extent of the


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shortage of assets remaining to pay these recoverables. While we believe the intercompany reinsurance recoverables from Century are not impaired at this time, we cannot assure that adverse development with respect to Century's loss reserves, if manifested, will not result in Century's insolvency, which could result in our recognizing a loss to the extent of any uncollectible reinsurance from Century. This could have an adverse effect on our results of operations and financial condition.

Our net income may be volatile because certain products sold by our Life Insurance business expose us to reserve and fair value liability changes that are directly affected by market and other factors and assumptions.
Our pricing, establishment of reserves for future policy benefits and valuation of life insurance and annuity products, including reinsurance programs, are based upon various assumptions, including but not limited to equity market changes, interest rates, mortality rates, morbidity rates, and policyholder behavior. The process of establishing reserves for future policy benefits relies on our ability to accurately estimate insured events that have not yet occurred but that are expected to occur in future periods. Significant deviations in actual experience from assumptions used for pricing and for reserves for future policy benefits could have an adverse effect on the profitability of our products and our business.

Under reinsurance programs covering variable annuity guarantees, we assumed the risk of guaranteed minimum death benefits (GMDB) and guaranteed living benefits (GLB), principally guaranteed minimum income benefits (GMIB), associated with variable annuity contracts. We ceased writing this business in 2007. Our net income is directly impacted by changesthe change in the reservesreserve calculated in connection with the reinsurance of GMDB liability and GLB liabilities. In addition, our net income is directly impacted by the change in the fair value of the GLB liability. Reported liabilities for both GMDB and GLB reinsurance are determined using internal valuation models which require considerable judgment and are subject to significant uncertainty. Additionally, the fair value of GLB liabilities is impacted by market conditions. Refer to the “Critical Accounting Estimates – Guaranteed living benefits (GLB) derivatives” under Item 7 and “Quantitative and Qualitative Disclosures about Market Risk – Reinsurance of GMDB and GLB guarantees” under Item 7A for additional information on the assumptions used in this program. We view our variable annuity reinsurance business as having a similar risk profile to that of catastrophe reinsurance, with the probability of long-term economic loss relatively small at the time of pricing. Adverse changes in market factors and policyholder behavior will have an impact on both Life Insurance underwriting income and consolidated net income.

Payment of obligations under surety bonds could have an adverse effect on our results of operations.
The surety business tends to be characterized by infrequent but potentially high severity losses. The majority of our surety obligations are intended to be performance-based guarantees. When losses occur, they may be mitigated, at times, by recovery rights to the customer’s assets, contract payments, and collateral and bankruptcy recoveries. We have substantial commercial and construction surety exposure for current and prior customers. In that regard, we have exposures related to surety bonds issued on behalf of companies that have experienced or may experience deterioration in creditworthiness. If the financial condition of these companies were adversely affected by the economy or otherwise, we may experience an increase in filed claims and may incur high severity losses, which could have an adverse effect on our results of operations.


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Our exposure to various commercial and contractual counterparties, our reliance on brokers, and certain of our policies may subject us to credit risk.
We have exposure to counterparties through a variety of commercial transactions and arrangements, including reinsurance transactions; agreements with banks, hedge funds and other investment vehicles; and derivative transactions, that expose us to credit risk in the event our counterparty fails to perform its obligations. This includes exposure to financial institutions in the form of secured and unsecured debt instruments and equity securities. Moreover, wea deposit paid deposits in connection with our pending acquisition ofagreement to acquire additional shares of Huatai Insurance Group Company Limited (Huatai Group), which exposes us to risk if the transactions aretransaction is not completed.

In accordance with industry practice, we generally pay amounts owed on claims to brokers who, in turn, remit these amounts to the insured or ceding insurer. Although the law is unsettled and depends upon the facts and circumstances of the particular case, in some jurisdictions, if a broker fails to make such a payment, we might remain liable to the insured or ceding insurer for the deficiency. Conversely, in certain jurisdictions, if a broker does not remit premiums paid for these policies over to us, these premiums might be considered to have been paid and the insured or ceding insurer will no longer be liable to us for those amounts, whether or not we have actually received the premiums from the broker. Consequently, we assume a degree of credit risk associated with a broker with whom we transact business. However, due to the unsettled and fact-specific nature of the law, we are unable to quantify our exposure to this risk. To date, we have not experienced any material losses related to this credit risk.

Under the terms of certain high-deductible policies which we offer, such as workers’ compensation and general liability, our customers are responsible to reimburse us for an agreed-upon dollar amount per claim. In nearly all cases we are required


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under such policies to pay covered claims first, and then seek reimbursement for amounts within the applicable deductible from our customers. This obligation subjects us to credit risk from these customers. While we generally seek to mitigate this risk through collateral agreements and maintain a provision for uncollectible accounts associated with this credit exposure, an increased inability of customers to reimburse us in this context could have an adverse effect on our financial condition and results of operations. In addition, a lack of credit available to our customers could impact our ability to collateralize this risk to our satisfaction, which in turn, could reduce the amount of high-deductible policies we could offer.

Since we depend on a few distribution and bancassurance partners for a large portion of our revenues, loss of business provided by any one of them could adversely affect us.
We market our insurance and reinsurance worldwide primarily through independent insurance agents, insurance and reinsurance brokers, and bancassurance relationships. Accordingly, our business is dependent on the willingness of these agents and brokers to recommend our products to their customers, who may also promote and distribute the products of our competitors. Deterioration in relationships with our agent and broker distribution network or their increased promotion and distribution of our competitors' products could adversely affect our ability to sell our products. Loss of all or a substantial portion of the business provided by one or more of these agents and brokers could have an adverse effect on our business.

Financial

Our investment performance may affect our financial results and our ability to conduct business.
Our investment assets are invested by professional investment management firms under the direction of our management team in accordance with investment guidelines approved by the Risk & Finance Committee of the Board of Directors. Although our investment guidelines stress diversification of risks and conservation of principal and liquidity, our investments are subject to market risks and risks inherent in individual securities. Interest rates areOur investment performance is highly sensitive to many factors, including interest rates, inflation, monetary and fiscal policies, and domestic and international political conditions. Given the risk that London Interbank Offered Rate (LIBOR) will no longer be available, we are monitoring industry efforts via our external investment managers to transition away from LIBOR by the end of 2021. The volatility of our losses may force us to liquidate securities, which may cause us to incur capital losses. Realized and unrealized losses in our investment portfolio would reduce our book value, and if significant, can affect our ability to conduct business.

Volatility in interest rates could impact the performance of our investment portfolio which could have an adverse effect on our investment income and operating results. Although we take measures to manage the risks of investing in a changing interest rate environment, we may not be able to effectively mitigate interest rate sensitivity. Our mitigation efforts include maintaining a high qualityhigh-quality portfolio of primarily fixed income investments with a relatively short duration to reduce the effect of interest rate changes on book value. A significant increase in interest rates would generally have an adverse effect on our book value. Our life insurance investments typically focus on longer duration bonds to better match the obligations of this business. For the life insurance business, policyholder behavior may be influenced by changing interest rate conditions and require a re-balancing of duration to effectively manage our asset/liability position.


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As stated, our fixed income portfolio is primarily invested in high quality, investment-grade securities. However, a smaller portion of the portfolio, approximately 1618 percent at December 31, 2019,2020, is invested in below investment-grade securities. These securities, which pay a higher rate of interest, also have a higher degree of credit or default risk and may also be less liquid in times of economic weakness or market disruptions. While we have put in place procedures to monitor the credit risk and liquidity of our invested assets, it is possible that, in periods of economic weakness (such as recession), we may experience credit or default losses in our portfolio, which could adversely affect our results of operations and financial condition.

As a part of our ongoing analysis of our investment portfolio, we are required to assess whether the fixed maturities we holdcurrent expected credit losses for all held-to-maturity securities and evaluate expected credit losses for available-for-sale securities when fair value is below amortized cost, which we have recorded an unrealized loss have been “other-than-temporarily impaired” under GAAP, which implies an inabilityconsiders reasonable and supportable forecasts of future economic conditions in addition to recover the full economic benefits of these securities. Refer to Note 2 to the Consolidated Financial Statements for additional information.information about past events and current conditions. This analysis requires a high degree of judgmentjudgment. Financial assets with similar risk characteristics and requires us to make certain assessments aboutrelevant historical loss information are included in the potential for recoverydevelopment of the assets we hold.an estimate of expected lifetime losses. Declines in relevant stock and other financial markets and other factors impacting the value of our investments could result in impairments and could adversely affectan adverse effect on our net income and other financial results.

We may require additional capital or financing sources in the future, which may not be available or may be available only on unfavorable terms.
Our future capital and financing requirements depend on many factors, including our ability to write new business successfully and to establish premium rates and reserves at levels sufficient to cover losses, as well as our investment performance and capital expenditure obligations, including with respect to acquisitions. We may need to raise additional funds through financings


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or access funds through existing or new credit facilities or through short-term repurchase agreements. We also from time to time seek to refinance debt or credit as amounts become due or commitments expire. Any equity or debt financing or refinancing, if available at all, may be on terms that are not favorable to us. In the case of equity financings, dilution to our shareholders could result, and in any case, such securities may have rights, preferences, and privileges that are senior to those of our Common Shares. Our access to funds under existing credit facilities is dependent on the ability of the banks that are parties to the facilities to meet their funding commitments. Under Swiss law we would be prohibited from selling shares in an equity financing at a purchase price below our then-current par value. If we cannot obtain adequate capital or sources of credit on favorable terms, or at all, we could be forced to use assets otherwise available for our business operations, and our business, results of operations, and financial condition could be adversely affected.

We may be required to post additional collateral because of changes in our reinsurance liabilities to regulated insurance companies, or because of regulatory changes that affect our companies.
If our reinsurance liabilities increase, including in our property & casualty and variable annuity reinsurance businesses, we may be required to post additional collateral for insurance company clients. In addition, regulatory changes sometimes affect our obligations to post collateral. The need to post this additional collateral, if significant enough, may require us to sell investments at a loss in order to provide securities of suitable credit quality or otherwise secure adequate capital at an unattractive cost. This could adversely impact our net income and liquidity and capital resources.

U.S. and global economic and financial industry events and their consequences could harm our business, our liquidity and financial condition, and our stock price.
The consequences of adverse global or regional market and economic conditions may affect (among other aspects of our business) the demand for and claims made under our products, the ability of customers, counterparties, and others to establish or maintain their relationships with us, our ability to access and efficiently use internal and external capital resources, the availability of reinsurance protection, the risks we assume under reinsurance programs covering variable annuity guarantees, and our investment performance. The increasing impact of climate change could affect our cost of claims, loss ratios, and financial results. Volatility in the U.S. and other securities markets may adversely affect our stock price.

A decline in our financial strength ratings could affect our standing among distribution partners and customers and cause our premiums and earnings to decrease. A decline in our debt ratings could increase our borrowing costs and impact our ability to access capital markets.
Ratings are an important factor in establishing the competitive position of insurance and reinsurance companies. The objective of these rating systems is to provide an opinion of an insurer's financial strength and ability to meet ongoing obligations to its policyholders. A ratings downgrade could result in a substantial loss of business as insureds, ceding companies, and brokers move to other insurers and reinsurers with higher ratings. If one or more of our debt ratings were downgraded, we could also incur higher borrowing costs, and our ability to access the capital markets could be impacted. Additionally, we could be required to post collateral or be faced with the cancellation of policies and resulting premium in certain circumstances. We

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cannot give any assurance regarding whether or to what extent any of the rating agencies might downgrade our ratings in the future.

Our ability to pay dividends and/or to make payments on indebtedness may be constrained by our holding company structure.
Chubb Limited is a holding company that owns shares of its operating insurance and reinsurance subsidiaries along with several loans receivable from affiliates. Beyond this it does not itself have any significant operations or liquid assets. Repayment of loans receivable, guarantee fees and dividends and other permitted distributions from our insurance subsidiaries are its primary sources of funds to meet ongoing cash requirements, including any future debt service payments, other expenses, repurchases of its shares, and to pay dividends to our shareholders. Some of our insurance subsidiaries are subject to significant regulatory restrictions limiting their ability to declare and pay dividends. The inability of our insurance subsidiaries to pay dividends (or other intercompany amounts due, such as intercompany debt obligations) in an amount sufficient to enable us to meet our cash requirements at the holding company level could have an adverse effect on our operations and our ability to repurchase shares and pay dividends to our shareholders.

Swiss law imposes certain restrictions on our ability to repurchase our shares.
Swiss law imposes certain withholding tax and other restrictions on a Swiss company’s ability to return earnings or capital to its shareholders, including through the repurchase of its own shares. We may only repurchase shares to the extent that sufficient freely distributable reserves are available. In addition, Swiss law requires that the total par value of Chubb's acquisition of treasury shares must not be in excess of 10 percent of its total share capital. As a result, in order to maintain our share repurchase program, our shareholders must periodically authorize, through ballot item approval at our annual general meeting,


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a reduction in our share capital through the cancellation of designated blocks of repurchased shares held in treasury. If our shareholders do not approve the cancellation of previously repurchased shares, we may be unable to return capital to shareholders through share repurchases in the future. Furthermore, our current repurchase program relies on a Swiss tax ruling. Any future revocation or loss of our Swiss tax ruling or the inability to conduct repurchases in accordance with the ruling could also jeopardize our ability to continue repurchasing our shares.

Our operating results and shareholders' equity may be adversely affected by currency fluctuations.
Our reporting currency is the U.S. dollar. In general, we match assets and liabilities in local currencies. Where possible, capital levels in local currencies are limited to satisfy minimum regulatory requirements and to support local insurance operations. The principal currencies creating foreign exchange risk are the euro, British pound, sterling, the euro, theCanadian dollar, Chinese yuan, Australian dollar, Mexican peso, the Brazilian real, the Korean won, the Canadian dollar, the Japanese yen, the Thai baht, the Australian dollar, and the Hong Kong dollar. At December 31, 2019,2020, approximately16.6 21.4 percent of our net assets were denominated in foreign currencies. We may experience losses resulting from fluctuations in the values of non-U.S. currencies, which could adversely impact our results of operations and financial condition.

Operational

The regulatory and political regimes under which we operate, and their volatility, could have an adverse effect on our business.
We may from time to time face challenges resulting from changes in applicable law and regulations in particular jurisdictions, or changes in approach to oversight of our business from insurance or other regulators.

Our insurance and reinsurance subsidiaries conduct business globally. Our businesses in each jurisdiction are subject to varying degrees of regulation and supervision. The laws and regulations of the jurisdictions in which our insurance and reinsurance subsidiaries are domiciled require, among other things, maintenance of minimum levels of statutory capital, surplus, and liquidity; various solvency standards; and periodic examinations of subsidiaries' financial condition. In some jurisdictions, laws and regulations also restrict payments of dividends and reductions of capital. Applicable statutes, regulations, and policies may also restrict the ability of these subsidiaries to write insurance and reinsurance policies, to make certain investments, and to distribute funds. The purpose of insurance laws and regulations generally is to protect policyholders and ceding insurance companies, not our shareholders. For example, some jurisdictions have enacted various consumer protection laws that make it more burdensome for insurance companies to sell policies and interact with customers in personal lines businesses. Failure to comply with such regulations can lead to significant penalties and reputational injury.

The foreign and U.S. federal and state laws and regulations that are applicable to our operations are complex and may increase the costs of regulatory compliance or subject our business to the possibility of regulatory actions or proceedings. Laws and regulations not specifically related to the insurance industry include trade sanctions that relate to certain countries, anti-money laundering laws, and anti-corruption laws. The insurance industry is also affected by political, judicial, and legal developments that may create new and expanded regulations and theories of liability. The current economic and financial climates present

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additional uncertainties and risks relating to increased regulation and the potential for increased involvement of the U.S. and other governments in the financial services industry.

Regulators in countries where we have operations are workingcontinue to work with the International Association of Insurance Supervisors (IAIS) to consider changes to insurance company supervision, including with respect to group supervision and solvency requirements. The IAIS has developed a Common Framework for the Supervision of Internationally Active Insurance Groups (ComFrame), which is focused on the effective group-wide supervision of international active insurance groups (IAIGs), such as Chubb. As part of ComFrame, the IAIS has announced plans to developis developing an international capital standard for insurance groups.such IAIGs. The details of ComFrame including this global capital standard and its applicability to Chubb are evolving and uncertain at this time. In addition, Chubb businesses across the EU are subject to Solvency II, a capital and risk management regime, and our Bermuda businesses are subject to an equivalent of the EU's Solvency II regime. Also applicable to Chubb businesses are the requirements of the Swiss Financial Market Supervisory Authority (FINMA) whose regulations include Swiss Solvency Tests. There are also Risk Based Capital (RBC) requirements in the U.S. which are also subject to revision in response to global developments. While it is not certain how or ifThe impact to Chubb of these actions will impact Chubb,developments remains uncertain, although currently we do not currently expect that our capital management strategies, results of operations and financial condition will be materially affected by these regulatory changes.

Evolving privacy and data security regulations could adversely affect our business.
We are subject to numerous U.S. federal and state laws and non-U.S. regulations governing the protection of personal and confidential information of our clients and employees, including in relation to medical records, credit card data and financial


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information. These laws and regulations are increasing in complexity and number, change frequently, sometimes conflict, and could expose Chubb to significant monetary damages, regulatory enforcement actions, fines and/or criminal prosecution in one or more jurisdictions.

We are subject to the New York Department of Financial Services’ Cybersecurity Regulation (the NYDFS Cybersecurity Regulation) which mandates detailed cybersecurity standards for all institutions, including insurance entities, authorized by the NYDFS to operate in New York. The NYDFS Cybersecurity Regulation has increased our compliance costs and could increase the risk of noncompliance and subject us to regulatory enforcement actions and penalties, as well as reputation risk.

Additionally, in 2017, the National Association of Insurance Commissioners (NAIC) adopted an Insurance Data Security Model Law, which requires licensed insurance entities to comply with detailed information security requirements. ItA number of states have enacted it into law, and it is not yet known whether or not, and to what extent, additional states legislatures or insurance regulators where we operate will enact the Insurance Data Security Model Law in whole or in part, or in a modified form.it. Such enactments, especially if inconsistent between states or with existing laws and regulations could raise compliance costs or increase the risk of noncompliance, with the attendant risk of being subject to regulatory enforcement actions and penalties, as well as reputational harm.

The EU General Data Protection Regulation (the “GDPR”), which became effective in 2018, is a comprehensive regulation applying across all EU member states. All our business units (regardless of whether they are located in the EU) may be subject to the GDPR when personal data is processed in relation to the offer of goods and services to individuals within the EU. Our failure to comply with GDPR and other countries’ privacy or data security-related laws, rules or regulations could result in significant penalties imposed by regulators, which could have an adverse effect on our business, financial condition and results of operations.

Significant other comprehensive privacy laws have been enacted by other jurisdictions, most notably the California Consumer Privacy Act (CCPA), the California Privacy Rights Act (CPRA), and Brazil’s Lei Geral de Protecao de Dados (LGPD), which may affect our use of data and could affect our operations and subject us to fines and actions for noncompliance. In the U.S., several other states are considering similar legislation, and there are ongoing discussions regarding a National Privacy Law. New laws similar to the GDPR and the CCPA are expected to be enacted in coming years in various countries and jurisdictions in which we operate.

PoliticalEconomic uncertainty in either or both of the United Kingdom ("U.K.") and the European Union may lead to volatility("EU"), and/or operational uncertainty between them, may have an adverse effect on our business, our liquidity and financial condition, and our stock price.
On June 23, 2016, the United Kingdom (U.K.) voted in a national referendum to withdraw from the European Union (EU). On March 29, 2017, the U.K. government gave notice to the EU, under Article 50(2) of the Treaty on EU, of the U.K.’s intention to withdraw from the EU. The U.K. ratified the withdrawal agreement and ceased to be a Member Statemember of the EU (Brexit) on January 31, 2020.

We have significant operations in2020 ("Brexit"). Economic relations between the U.K. and the EU are now governed by a Trade and Cooperation Agreement which is limited in scope to primarily the trade of goods, transport, energy links and fishing. Uncertainties remain relating to certain aspects of the U.K.'s future economic, trading and legal relationships with the EU and with other countries, including with respect to financial services industries such as ours. Moreover, free movement of persons, services and capital between the U.K. and the EU member states that, operationally, have been affected by Brexit. In anticipationended on January 1, 2021, which has meant the loss to U.K./EU service sectors of the automatic right to offer such services across the EU and U.K. The overall

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macroeconomic impact of Brexit - an impact which inevitably affects the volume of business we redomiciledtransact in Europe - is not yet clear. Throughout both the headquarters of our European carriers to France effective January 1, 2019. Paris is the principal office for our Continental European operations. WeEU and U.K., we have a significant investment thereinvestments in both financial and human resources, as well as a large portfolio of commercial and consumer insurance business throughout France. Following Brexit, Chubbbusiness. On an operational level, we have already redomiciled our primary European carriers from the U.K. to France although we will continue to have a substantial presence in London in addition to its offices and operations across the U.K. and the EU.

Prior to Brexit, the rules governing the EU Single Market (which is made up of the 27 other EU member states and to some extent, Iceland, Liechtenstein, and Norway (together, the European Economic Area or EEA)) permitted U.K. insurers (as well as EEA insurers operating as passported brancheselsewhere in the U.K., such as our French companies Chubb European Group SE and ACE Europe Life SE), to underwrite risks from the U.K. into EEA member states via a “passport” prior to Brexit.

The withdrawal agreement between the U.K. and the EU includes, following Brexit, a transition or implementation period to avoid a "cliff edge" Brexit, meaning that the U.K. remains subject to, and has the benefit of, all EU legislation, including passporting rights, until December 31, 2020. This period is intended to enable the EU and the U.K. to negotiate a trade agreement for the post-Brexit relationship between the U.K. and the EU and can, pursuant to the withdrawal agreement, be extended beyond the end of 2020 with the consent of both the U.K. and the EU. However, the U.K. government included a section in the European Union (United Kingdom Withdrawal Agreement) Act 2020 that has made it illegal for the U.K. Parliament to seek an extension of the transition or implementation period from the EU. To the extent, therefore, that it proves impossible to negotiate a trade agreement between the U.K. and the EU by December 31, 2020, there remains a risk that a "cliff edge" Brexit may nevertheless arise, including the benefits of passporting rights.


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Even if a free trade agreement is concluded between the U.K. and the EU prior to the end of the transition or implementation period, such free trade agreement
may not maintain the passporting rights of U.K. insurers, nor deem relevant U.K. regulations to be equivalent to those of the EU. In the event that, following the end of the transition or implementation period, U.K. insurers are unable to access the EU Single Market via a passporting arrangement, a regulatory equivalence regime or other similar arrangement, such insurers may not be able to underwrite risks into EEA member states except through local branches incorporated in the EEA. Such branches might require local authorization, regulatory and prudential supervision, and capital to be deposited.

Our worldwide operations, particularly in developing nations, expose us to global geopolitical developments that could have an adverse effect on our business, liquidity, results of operations, and financial condition.
With operations in 54 countries and territories, we provide insurance and reinsurance products and services to a diverse group of clients worldwide, including operations in various developing nations. Both current and future foreign operations could be adversely affected by unfavorable geopolitical developments including law changes; tax changes; changes in trade policies; changes to visa or immigration policies; regulatory restrictions; government leadership changes; political events and upheaval; sociopolitical instability; social, political or economic instability resulting from climate change; and nationalization of our operations without compensation. Adverse activity in any one country could negatively impact operations, increase our loss exposure under certain of our insurance products, and could, otherwise, have an adverse effect on our business, liquidity, results of operations, and financial condition depending on the magnitude of the events and our net financial exposure at that time in that country.

A failure in our operational systems or infrastructure or those of third parties, including due to security breaches or cyber-attacks, could disrupt business, damage our reputation, and cause losses.
Our operations rely on the secure processing, storage, and transmission of confidential and other information and assets, including in our computer systems and networks and those of third-party service providers. Our business depends on effective information security and systems and the integrity and timeliness of the data our information systems use to run our business. Our ability to adequately price products and services, to establish reserves, to provide effective, efficient and secure service to our customers, to value our investments and to timely and accurately report our financial results also depends significantly on the integrity and availability of the data we maintain, including that within our information systems, as well as data in and assets held through third-party service providers and systems. Although we have implemented administrative and technical controls and have taken protective actions to reduce the risk of cyber incidents and to protect our information technology and assets, and although we additionally endeavor to modify such procedures as circumstances warrant and negotiate agreements with third-party providers to protect our assets, such measures may be insufficient to prevent unauthorized access, computer viruses, malware or other malicious code or cyber-attack, business compromise attacks, catastrophic events, system failures and disruptions, employee errors or malfeasance, third party (including outsourced service providers) errors or malfeasance, loss of assets and other events that could have security consequences (each, a Security Event). As the breadth and complexity of our security infrastructure continues to grow, the potential risk of a Security Event increases. Such an event or events may jeopardize Chubb's or its clients' or counterparties' confidential and other information processed and stored within Chubb, and transmitted through its computer systems and networks, or otherwise cause interruptions, delays, or malfunctions in Chubb's, its clients', its counterparties', or third parties' operations, or result in data loss or loss of assets which could result in significant losses, reputational damage or an adverse effect on our operations and critical business functions. Chubb may be required to expend significant additional resources to modify our protective measures or to investigate and remediate vulnerabilities or other exposures and to pursue recovery of lost data or assets and we may be subject to litigation and financial losses that are either not insured against or not fully covered by insurance maintained.

Despite the contingency plans and facilities we have in place and our efforts to observe the regulatory requirements surrounding information security, our ability to conduct business may be adversely affected by a disruption of the infrastructure that supports our business in the communities in which we are located, or of outsourced services or functions. This may include a disruption involving electrical, communications, transportation, or other services used by Chubb. If a disruption occurs in one location and Chubb employees in that location are unable to occupy our offices and conduct business or communicate with or travel to other locations, our ability to service and interact with clients may suffer and we may not be able to successfully implement contingency plans that depend on communication or travel.

We use analytical models to assist our decision making in key areas such as underwriting, claims, reserving, and catastrophe risks but actual results could differ materially from the model outputs and related analyses.
We use various modeling techniques (e.g., scenarios, predictive, stochastic and/or forecasting) and data analytics to analyze and estimate exposures, loss trends and other risks associated with our assets and liabilities. We use the modeled outputs and


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related analyses to assist us in decision-making (e.g., underwriting, pricing, claims, reserving, reinsurance, and catastrophe risk) and to maintain competitive advantage. The modeled outputs and related analyses are subject to various assumptions, uncertainties, model errors and the inherent limitations of any statistical analysis, including the use of historical internal and industry data. In addition, the modeled outputs and related analyses may from time to time contain inaccuracies, perhaps in

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material respects, including as a result of inaccurate inputs or applications thereof. Climate change may make modeled outcomes less certain or produce new, non-modeled risks.Consequently, actual results may differ materially from our modeled results. If, based upon these models or other factors, we misprice our products or underestimate the frequency and/or severity of loss events, or overestimate the risks we are exposed to, new business growth and retention of our existing business may be adversely affected which could have an adverse effect on our results of operations and financial condition.

We could be adversely affected by the loss of one or more key executives or by an inability to attract and retain qualified personnel.
Our success depends on our ability to retain the services of our existing key executives and to attract and retain additional qualified personnel in the future. The loss of the services of any of our key executives or the inability to hire and retain other highly qualified personnel in the future could adversely affect our ability to conduct or grow our business. This risk may be particularly acute for us relative to some of our competitors because some of our senior executives work in countries where they are not citizens and work permit and immigration issues could adversely affect the ability to retain or hire key persons. We do not maintain key person life insurance policies with respect to our employees.

Employee error and misconduct may be difficult to detect and prevent and could adversely affect our business, results of operations, and financial condition.
Losses may result from, among other things, fraud, errors, failure to document transactions properly, failure to obtain proper internal authorization, failure to comply with underwriting or other internal guidelines, or failure to comply with regulatory requirements. It is not always possible to deter or prevent employee misconduct and the precautions that we take to prevent and detect this activity may not be effective in all cases. Resultant losses could adversely affect our business, results of operations, and financial condition.

Strategic

The continually changing landscape, including competition, technology and products, and existing and new market entrants could reduce our margins and adversely impact our business and results of operations.
Insurance and reinsurance markets are highly competitive. We compete on an international and regional basis with major U.S., Bermuda, European, and other international insurers and reinsurers and with underwriting syndicates, some of which have greater financial, technological, marketing, distribution and/or management resources than we do. In addition, capital market participants have created alternative products that are intended to compete with reinsurance products. We also compete with new companies and existing companies that move into the insurance and reinsurance markets.If competition, or technological or other changes to the insurance markets in which we operate, limits our ability to retain existing business or write new business at adequate rates or on appropriate terms, our business and results of operations could be materially and adversely affected. Increased competition could also result in fewer submissions, lower premium rates, and less favorable policy terms and conditions, which could reduce our profit margins and adversely impact our net income and shareholders' equity.

Recent technological advancements in the insurance industry and information technology industry present new and fast-evolving competitive risks as participants seek to increase transaction speeds, lower costs and create new opportunities. Advancements in technology are occurring in underwriting, claims, distribution and operations at a pace that may quicken, including as companies increase use of data analytics and technology as part of their business strategy. We will be at a competitive disadvantage if, over time, our competitors are more effective than us in their utilization of technology and evolving data analytics. If we do not anticipate or keep pace with these technological and other changes impacting the insurance industry, it could also limit our ability to compete in desired markets.

Insurance and reinsurance markets are historically cyclical, and we expect to experience periods with excess underwriting capacity and unfavorable premium rates.
The insurance and reinsurance markets have historically been cyclical, characterized by periods of intense price competition due to excessive underwriting capacity as well as periods when shortages of capacity permitted favorable premium levels. An increase in premium levels is often offset by an increasing supply of insurance and reinsurance capacity, either by capital provided by new entrants or by the commitment of additional capital by existing insurers or reinsurers, which may cause prices to decrease. Any of these factors could lead to a significant reduction in premium rates, less favorable policy terms, and fewer submissions for our underwriting services. In addition to these considerations, changes in the frequency and severity of losses


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suffered by insureds and insurers may affect the cycles of the insurance and reinsurance markets significantly, as could periods of economic weakness (such as recession).


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The integration of acquired companies may not be as successful as we anticipate.
Acquisitions involve numerous operational, strategic, financial, accounting, legal, tax, and other risks; potential liabilities associated with the acquired businesses; and uncertainties related to design, operation and integration of acquired businesses’ internal controls over financial reporting. Difficulties in integrating an acquired company, along with its personnel, may result in the acquired company performing differently than we expected, in operational challenges or in our failure to realize anticipated expense-related efficiencies. This may also apply to companies in which we acquire majority ownership. Our existing businesses could also be negatively impacted by acquisitions. In addition, goodwill and intangible assets recorded in connection with insurance company acquisitions may be impaired if premium growth, underwriting profitability, agency retention and policy persistency, among other factors, differ from expectations.

There is also the potential that proposed acquisitions that have been publicly announced will not be consummated, even if a definitive agreement has been signed by the parties. If an agreement is terminated before closing, the result would be that our proposed acquisition would not occur, which could, among other things, expose us to damages or liability and adversely impact our stock price and future operations.

We may be subject to U.S. tax and Bermuda tax which may have an adverse effect on our results of operations and shareholder investment.
Chubb Limited and our non-U.S. subsidiaries operate in a manner so that none of these companies should be subject to U.S. tax (other than U.S. excise tax on insurance and reinsurance premium income attributable to insuring or reinsuring U.S. risks and U.S. withholding tax on some types of U.S. source investment income), because none of these companies should be treated as engaged in a trade or business within the U.S. However, because there is considerable uncertainty as to the activities that constitute being engaged in a trade or business within the U.S., we cannot be certain that the Internal Revenue Service (IRS) will not contend successfully that Chubb Limited or its non-U.S. subsidiaries are engaged in a trade or business in the U.S. If Chubb Limited or any of its non-U.S. subsidiaries were considered to be engaged in a trade or business in the U.S., such entity could be subject to U.S. corporate income and branch profits taxes on the portion of its earnings effectively connected to such U.S. business, in which case our results of operations and our shareholders' investments could be adversely affected.

The Bermuda Minister of Finance, under the Exempted Undertakings Tax Protection Act 1966 of Bermuda, as amended, has given Chubb Limited and its Bermuda insurance subsidiaries a written assurance that if any legislation is enacted in Bermuda that would impose tax computed on profits or income, or computed on any capital asset, gain, or appreciation, or any tax in the nature of estate duty or inheritance tax, then the imposition of any such tax would not be applicable to those companies or any of their respective operations, shares, debentures, or other obligations until March 31, 2035, except insofar as such tax would apply to persons ordinarily resident in Bermuda or is payable by us in respect of real property owned or leased by us in Bermuda. We cannot be certain that we will not be subject to any Bermuda tax after March 31, 2035.

We could be adversely affected by certain features of the 2017 U.S. tax reform legislation.
New taxTax legislation known as the Tax Cuts and Jobs Act (2017 Tax Act) was enacted in the U.S. on December 22, 2017. In addition to reducing the U.S. corporate income tax rate from 35 percent to 21 percent, it fundamentally changed many elements of the pre-2017 Tax Act U.S. tax law and introduced several new concepts to tax multinational corporations such as us. Among the most notable new rules are the Base Erosion and Anti-Abuse Tax (commonly called BEAT), which may apply as a result of payments by U.S. taxpayers to non-U.S. affiliates, and the Global Intangible Low Taxed Income (GILTI) addition to Subpart F income, which for insurance groups potentially expands U.S. taxation on the earnings of foreign subsidiaries. The 2017 Tax Act also included a one-time reduced-rate transition tax in 2017 on previously untaxed post-1986 earnings of foreign subsidiaries of U.S. corporations. The 2017 Tax Act, which was generally effective in 2018, is a complex law with many significant new provisions. During 2018 and 2019,Since enactment, the IRS and U.S. Treasury Department issuedhave continued to issue rulings, notices, and proposed and final regulations to assist taxpayers in understanding and implementing the new provisions. There may be changes betweenSome of this guidance and final regulationsremains subject to be issuedcomment or in 2020. Thus,proposed form; thus, there are many uncertainties relating to its ultimate application and effects on our company.

The Biden Administration and several members of the U.S. Congress have suggested enacting legislation intended to modify aspects of the 2017 Tax Act. This legislation may include increases to the corporate income tax rate, as well as modifications to the GILTI provisions. It is possible that such legislation or other legislation could be enacted in the future and could have an adverse impact on us or our shareholders.


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The Organization for Economic Cooperation and Development (OECD) and the European Union (EU) are considering measures that might change long standing tax principles that could increase our taxes.
The OECD has published a framework for taxation that in many respects is different than long standing international tax principles. This framework is a proposal that we expect to develop further in 20202021 as it is designed by the OECD Secretariat. This framework is an alternative to digital services taxes that several countries have enacted or are considering. These changes could redefine what income is taxed in which country and institute a global minimum tax. These proposals may be completed


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by the end of 2020r later which could be adopted by OECD countries in 20212022 or later years. As countries unilaterally amend their tax laws to adopt certain parts of the OECD framework, this may increase the company’s income taxes and cause uncertainties related to our income taxes.

The OECD has also published an action plan several years ago to address base erosion and profit shifting (BEPS) impacting its member countries and other jurisdictions. It is possible that jurisdictions in which we do business could continue to react to the BEPS initiative or their own concerns by enacting tax legislation that could adversely affect us or our shareholders.

Several multilateral organizations, including the EU and the OECD have, in recent years, expressed concern about some countries not participating in adequate tax information exchange arrangements and have threatened those that do not agree to cooperate with punitive sanctions by member countries. It is still unclear what all these sanctions might be, which countries might adopt them, and when or if they might be imposed. We cannot assure, however, that the Tax Information Exchange Agreements (TIEAs) that have been entered into by Switzerland and Bermuda will be sufficient to preclude all of the sanctions described above, which, if ultimately adopted, could adversely affect us or our shareholders.

Shareholders

There are provisions in our charter documents that may reduce the voting rights and diminish the value of our Common Shares.
Our Articles of Association generally provide that shareholders have one vote for each Common Share held by them and are entitled to vote at all meetings of shareholders. However, the voting rights exercisable by a shareholder may be limited so that certain persons or groups are not deemed to hold 10 percent or more of the voting power conferred by our Common Shares. Moreover, these provisions could have the effect of reducing the voting power of some shareholders who would not otherwise be subject to the limitation by virtue of their direct share ownership. The Board of Directors may refuse to register holders of shares as shareholders with voting rights based on certain grounds, including if the holder would, directly or indirectly, formally, constructively or beneficially own (as described in Articles 8 and 14 of our Articles of Association) or otherwise control voting rights with respect to 10 percent or more of the registered share capital recorded in the commercial register. In addition, the Board of Directors shall reject entry of holders of registered shares as shareholders with voting rights in the share register or shall decide on their deregistration when the acquirer or shareholder upon request does not expressly state that she/he has acquired or holds the shares in her/his own name and for her/his account.

Applicable laws may make it difficult to effect a change of control of our company.
Before a person can acquire control of a U.S. insurance company, prior written approval must be obtained from the insurance commissioner of the state where the domestic insurer is domiciled. Prior to granting approval of an application to acquire control of a domestic insurer, the state insurance commissioner will consider such factors as the financial strength of the applicant, the integrity and management of the applicant's Board of Directors and executive officers, the acquirer's plans for the future operations of the domestic insurer, and any anti-competitive results that may arise from the consummation of the acquisition of control. Generally, state statutes provide that control over a domestic insurer is presumed to exist if any person, directly or indirectly, owns, controls, holds with the power to vote, or holds proxies representing 10 percent or more of the voting securities of the domestic insurer. Because a person acquiring 10 percent or more of our Common Shares would indirectly control the same percentage of the stock of our U.S. insurance subsidiaries, the insurance change of control laws of various U.S. jurisdictions would likely apply to such a transaction. Laws of other jurisdictions in which one or more of our existing subsidiaries are, or a future subsidiary may be, organized or domiciled may contain similar restrictions on the acquisition of control of Chubb.

While our Articles of Association limit the voting power of any shareholder to less than 10 percent, we cannot assure that the applicable regulatory body would agree that a shareholder who owned 10 percent or more of our Common Shares did not, because of the limitation on the voting power of such shares, control the applicable insurance subsidiary.

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


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Shareholder voting requirements under Swiss law may limit our flexibility with respect to certain aspects of capital management.
Swiss law allows our shareholders to authorize share capital which can be issued by the Board of Directors without shareholder approval, but this authorization must be renewed by the shareholders every two years. Swiss law also does not provide as much flexibility in the various terms that can attach to different classes of stock as permitted in other jurisdictions. Swiss law also reserves for approval by shareholders many corporate actions over which the Board of Directors had authority prior to our re-


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domesticationre-domestication to Switzerland. For example, dividends must be approved by shareholders. While we do not believe that Swiss law requirements relating to our capital management will have an adverse effect on Chubb, we cannot assure that situations will not arise where such flexibility would have provided substantial benefits to our shareholders.

Chubb Limited is a Swiss company; it may be difficult to enforce judgments against it or its directors and executive officers.
Chubb Limited is incorporated pursuant to the laws of Switzerland. In addition, certain of our directors and officers reside outside the U.S. and all or a substantial portion of our assets and the assets of such persons are located in jurisdictions outside the U.S. As such, it may be difficult or impossible to effect service of process within the U.S. upon those persons or to recover against us or them on judgments of U.S. courts, including judgments predicated upon civil liability provisions of the U.S. federal securities laws.

Chubb has been advised by its Swiss counsel that there is doubt as to whether the courts in Switzerland would enforce:
judgments of U.S. courts based upon the civil liability provisions of the U.S. federal securities laws obtained in actions against it or its directors and officers, who reside outside the U.S.; or
original actions brought in Switzerland against these persons or Chubb predicated solely upon U.S. federal securities laws.

Chubb has also been advised by its Swiss counsel that there is no treaty in effect between the U.S. and Switzerland providing for this enforcement and there are grounds upon which Swiss courts may not enforce judgments of U.S. courts. Some remedies available under the laws of U.S. jurisdictions, including some remedies available under the U.S. federal securities laws, would not be allowed in Swiss courts as contrary to that nation's public policy.

Shareholders may be subject to Swiss withholding taxes on the payment of dividends.
Our dividends are generally subject to a Swiss withholding tax at a rate of 35 percent; however, payment of a dividend in the form of a par value reduction or qualifying capital contribution reserve reduction is not subject to Swiss withholding tax. We have previously obtained shareholder approval for dividends to be paid in such form. We currently intendIt is our practice to recommend to shareholders that they annually approve the payment of dividends in such form but we cannot assure that our shareholders will continue to approve a reduction in such form each year or that we will be able to meet the other legal requirements for a reduction in par value, or that Swiss withholding tax rules will not be changed in the future. We estimate we would be able to pay dividends in such form, and thus exempt from Swiss withholding tax until 2028–2033. This range may vary depending upon changes in annual dividends, special dividends, certain share repurchases, fluctuations in U.S. dollar/Swiss franc exchange rate, changes in par value or qualifying capital contribution reserves or changes or new interpretations to Swiss corporate or tax law or regulations.

Under certain circumstances, U.S. shareholders may be subject to adverse U.S. federal income tax consequences.
Under certain circumstances, a U.S. person who owns or is deemed to own 10 percent or more of the voting power or value of a foreign corporation that is a “controlled foreign corporation” (CFC) (a foreign corporation in which 10 percent U.S. shareholders own or are deemed to own more than 50 percent of the voting power or value of the stock of a foreign corporation or more than 25 percent of certain foreign insurance corporations) for any period during a taxable year must include in gross income for U.S. federal income tax purposes a pro rata share of the CFC's "subpart F income". We believe that because of the dispersion of our share ownership it is unlikely that any U.S. person who acquires shares of Chubb Limited directly or indirectly through one or more foreign entities should be required to include any subpart F income in income under the CFC rules of U.S. tax law.

Separately, any U.S. persons who hold shares may be subject to U.S. federal income taxation at ordinary income tax rates on their proportionate share of our Related Person Insurance Income (RPII). If the RPII of any of our non-U.S. insurance subsidiaries (each a "Non-U.S. Insurance Subsidiary") were to equal or exceed 20 percent of that company's gross insurance income in any taxable year and direct or indirect insureds (and persons related to those insureds) own directly or indirectly through foreign entities 20 percent or more of the voting power or value of Chubb Limited, then a U.S. person who owns any shares of Chubb Limited (directly or indirectly through foreign entities) on the last day of the taxable year would be required to include in his or her income for U.S. federal income tax purposes such person's pro rata share of such company's RPII for the taxable year. In addition, any RPII that is includible in the income of a U.S. tax-exempt organization may be treated as unrelated

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business taxable income. We believe that the gross RPII of each Non-U.S. Insurance Subsidiary did not in prior years of operation and is not expected in the foreseeable future to equal or exceed 20 percent of each such company's gross insurance income. Likewise, we do not expect the direct or indirect insureds of each Non-U.S. Insurance Subsidiary (and persons related to such insureds) to directly or indirectly own 20 percent or more of either the voting power or value of our shares. However, we cannot be certain that this will be the case because some of the factors which determine the extent of RPII may be beyond our control. If these thresholds are met or exceeded, any U.S. person’s investment in Chubb Limited could be adversely affected.


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A U.S. tax-exempt organization may recognize unrelated business taxable income if a portion of our insurance income is allocated to the organization. This generally would be the case if either (i) Chubb Limited is considered a CFC and the tax-exempt shareholder is a 10 percent U.S. shareholder or (ii) there is RPII, certain exceptions do not apply, and the tax-exempt organization, directly (or indirectly through foreign entities) owns any shares of Chubb Limited. Although we do not believe that any U.S. tax-exempt organization should be allocated such insurance income, we cannot be certain that this will be the case. Potential U.S. tax-exempt investors are advised to consult their tax advisors.

U.S. persons who hold shares will be subject to adverse tax consequences if we are considered to be a Passive Foreign Investment Company (PFIC) for U.S. federal income tax purposes.
If Chubb Limited is considered a PFIC for U.S. federal income tax purposes, a U.S. person who holds Chubb Limited shares will be subject to adverse U.S. federal income tax consequences in which case their investment could be adversely affected. In addition, if Chubb Limited were considered a PFIC, upon the death of any U.S. individual owning shares, such individual's heirs or estate would not be entitled to a "step-up" in the basis of the shares which might otherwise be available under U.S. federal income tax laws. We believe that we are not, have not been, and currently do not expect to become, a PFIC for U.S. federal income tax purposes. We cannot assure, however, that we will not be deemed a PFIC by the IRS. Recently enacted U.S. federal tax law and recentlyrecent final and proposed regulations issued by the IRS and U.S. Treasury Department contain new rules that may affect the application of the PFIC provisions to an insurance company. FinalThe final regulations or pronouncements interpreting or clarifying these rules may be forthcoming. We cannot predict what impact, if any, such guidanceare effective for tax years beginning after January 15, 2021 and would have on an investor that is subjectnot apply to U.S. federal income taxation.us until 2022. Any shareholder electing to apply certain provisions of the newly finalized or proposed PFIC regulations prior to the effective date could be adversely affected by an investment in us. Shareholders are advised to consult their tax advisors.

ITEM 1B. Unresolved Staff Comments
There are currently no unresolved SEC staff comments regarding our periodic or current reports.

ITEM 2. Properties
We maintain office facilities around the world including in North America, Europe (including our principal executive offices in Switzerland), Bermuda, Latin America, Asia Pacific, and the Far East. Most of our office facilities are leased, although we own major facilities in Hamilton, Bermuda, and in the U.S., including in Philadelphia, Pennsylvania; Wilmington, Delaware; Whitehouse Station, New Jersey; and Simsbury, Connecticut. Management considers its office facilities suitable and adequate for the current level of operations.

ITEM 3. Legal Proceedings
The information required with respect to Item 3 is included in Note 10 h) to the Consolidated Financial Statements, which is hereby incorporated herein by reference.

ITEM 4. Mine Safety Disclosures
Item 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

Our Common Shares have been listed on the New York Stock Exchange since March 25, 1993, with a current par value of CHF 24.15 per share. The trading symbol for our Common Shares is "CB.""CB".

We have paid dividends each quarter since we became a public company in 1993. In 20192020 and 2018,2019, our annual dividends were paid by way of a distribution from capital contribution reserves (Additional paid-in capital) through the transfer of dividends from Additional paid-in capital to Retained earnings (free reserves) as approved by our shareholders.

Chubb Limited is a holding company whose principal sources of income are dividends and investment income from its operating subsidiaries. The ability of the operating subsidiaries to pay dividends to us and our ability to pay dividends to our shareholders are each subject to legal and regulatory restrictions. The recommendation and payment of future dividends will be based on the determination of the Board of Directors (Board) and will be dependent upon shareholder approval, profits and financial requirements of Chubb and other factors, including legal restrictions on the payment of dividends and other such factors as the Board deems relevant. Refer to Part I, Item 1A and Part II, Item 7 for additional information.

The number of record holders of Common Shares as of February 13, 202011, 2021 was 6,902.6,598. This is not the actual number of beneficial owners of Chubb's Common Shares since most of our shareholders hold their shares through a stockbroker, bank or other nominee rather than directly in their own names.

Refer to Part III, Item 12 for information relating to compensation plans under which equity securities are authorized for issuance.

Issuer's Repurchases of Equity Securities for the Three Months Ended December 31, 2019
2020
Period
Total Number of Shares Purchased (1)

 
Average Price
Paid per Share

 
Total Number of Shares Purchased as Part of Publicly Announced Plans (2)

 
Approximate Dollar Value of Shares that May Yet be Purchased Under Publicly Announced Plans (3)

October 1 through October 31703,138
 $153.65
 700,900
 $151 million
November 1 through November 30677,640
 $151.41
 670,000
 $1.55 billion
December 1 through December 31654,352
 $153.84
 653,500
 $1.45 billion
Total2,035,130
 $152.97
 2,024,400
  
(1)
This represents open market share repurchases and the surrender to Chubb of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock issued to employees and the exercise of options by employees.
(2)
The aggregate value of shares purchased in the three months ended December 31, 2019 as part of the publicly announced planswas $310 million.
(3)
Refer to Note 11 to the Consolidated Financial Statements for more information on the Chubb Limited securities repurchase authorizations. In November 2019, the Board authorized the repurchase of up to $1.5 billion of Chubb's Common Shares from November 21, 2019 through December 31, 2020. The $1.5 billion December 2018 Board authorization remained effective through December 31, 2019, and was used in advance of the $1.5 billion share repurchase authorized in November 2019. For the period January 1, 2020 through February 26, 2020, we repurchased 947,400 Common Shares for a total of $151 million in a series of open market transactions. As of February 26, 2020, $1.30 billion in share repurchase authorization remained through December 31, 2020.

Period
Total Number of Shares Purchased (1)
Average Price
Paid per Share
Total Number of Shares Purchased as Part of Publicly Announced Plan (2)
Approximate Dollar Value of Shares that May Yet be Purchased Under Publicly Announced Plans (3)
October 1 through October 31144,550 $131.11 140,000 $1.11  billion
November 1 through November 30886,702 $143.52 883,000 $2.48  billion
December 1 through December 31296,858 $152.73 295,000 $1.50 billion
Total1,328,110 $144.23 1,318,000 

(1)This column represents open market share repurchases and the surrender to Chubb of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock issued to employees and to cover the cost of the exercise of options by employees through stock swaps.

(2)The aggregate value of shares purchased in the three months ended December 31, 2020 as part of the publicly announced plan was $190 million.

(3)In November 2020, the Board authorized the repurchase of up to $1.5 billion of Chubb's Common Shares from November 19, 2020 through December 31, 2021. Subsequently, in February 2021, the Board approved an increase to the November 2020 share repurchase program of $1.0 billion to a total of $2.5 billion, effective through December 31, 2021. The $1.5 billion November 2019 Board authorization remained effective through December 31, 2020. Repurchases through December 31, 2020 were made under this authorization. For the period January 1, 2021 through February 24, 2021, we repurchased 1,971,000 Common Shares for a total of $327 million in a series of open market transactions under the share repurchase program authorized in November 2020. As of February 24, 2021, $2.17 billion in share repurchase authorization remained through December 31, 2021. Refer to Note 11 to the Consolidated Financial Statements for more information on the Chubb Limited securities repurchase authorizations.












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Performance Graph
Set forth below is a line graph comparing the dollar change in the cumulative total shareholder return on Chubb's Common Shares from December 31, 2014,2015, through December 31, 2019,2020, as compared to the cumulative total return of the Standard & Poor's 500 Stock Index and the cumulative total return of the Standard & Poor's Property-Casualty Insurance Index. The cumulative total shareholder return is a concept used to compare the performance of a company's stock over time and is the ratio of the stock price change plus the cumulative amount of dividends over the specified time period (assuming dividend reinvestment), to the stock price at the beginning of the time period. The chart depicts the value on December 31, 2015, 2016, 2017, 2018, 2019, and 2019,2020, of a $100 investment made on December 31, 2014,2015, with all dividends reinvested.

chart-a63cd71b30bef31dafaa02.jpg
cb-20201231_g1.jpg
12/31/201512/31/201612/31/201712/31/201812/31/201912/31/2020
Chubb Limited$100$116$130$118$145$147
S&P 500 Index$100$112$136$130$171$203
S&P 500 P&C Index$100$116$142$135$170$182

 12/31/201412/31/201512/31/201612/31/201712/31/201812/31/2019
Chubb Limited$100$104$120$136$123$151
S&P 500 Index$100$101$114$138$132$174
S&P 500 P&C Index$100$110$127$155$148$186


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ITEM 6. Selected Financial Data

On January 14, 2016, we completed the acquisition of The Chubb Corporation (Chubb Corp). The results of operations of Chubb Corp are included in our results from the acquisition date forward (i.e., after January 14, 2016 and only in the 2016, 2017, 2018 and 2019 columns) within the table below.Not required.

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(in millions of U.S. dollars, except per share data and ratios)2019
 2018
 2017
 2016
 2015
Operations data:         
Net premiums earned – excluding Life Insurance segment$28,947
 $27,846
 $26,933
 $26,694
 $15,266
Net premiums earned – Life Insurance segment2,343
 2,218
 2,101
 2,055
 1,947
Total net premiums earned31,290
 30,064
 29,034
 28,749
 17,213
Net investment income3,426
 3,305
 3,125
 2,865
 2,194
Losses and loss expenses18,730
 18,067
 18,454
 16,052
 9,484
Policy benefits740
 590
 676
 588
 543
Policy acquisition costs and administrative expenses9,183
 8,798
 8,614
 8,985
 5,211
Net income4,454
 3,962
 3,861
 4,135
 2,834
Weighted-average shares outstanding – diluted459
 467
 471
 466
 329
Diluted earnings per share$9.71
 $8.49
 $8.19
 $8.87
 $8.62
Balance sheet data (at end of period):         
Total investments$109,234
 $100,968
 $102,444
 $99,094
 $66,251
Total assets176,943
 167,771
 167,022
 159,786
 102,306
Net unpaid losses and loss expenses48,509
 48,271
 49,165
 47,832
 26,562
Net future policy benefits5,617
 5,304
 5,137
 4,854
 4,620
Long-term debt13,559
 12,087
 11,556
 12,610
 9,389
Trust preferred securities308
 308
 308
 308
 307
Total liabilities121,612
 117,459
 115,850
 111,511
 73,171
Shareholders' equity55,331
 50,312
 51,172
 48,275
 29,135
Book value per share$122.42
 $109.56
 $110.32
 $103.60
 $89.77
Selected data:         
Loss and loss expense ratio (1)
62.1% 62.1% 65.8% 57.7% 58.1%
Underwriting and administrative expense ratio (2)
28.5% 28.5% 28.9% 30.6% 29.2%
Combined ratio (3)
90.6% 90.6% 94.7% 88.3% 87.3%
Cash dividends per share$2.98
 $2.90
 $2.82
 $2.74
 $2.66

(1)
The Loss and loss expense ratio is calculated by dividing losses and loss expenses, excluding the Life Insurance segment, by Net premiums earned – excluding Life Insurance segment. Losses and loss expenses for the Life Insurance segment were $757 million, $766 million, $739 million, $663 million, and $601 million for the years ended December 31, 2019, 2018, 2017, 2016, and 2015, respectively.
(2)
The Underwriting and administrative expense ratio is calculated by dividing the policy acquisition costs and administrative expenses, excluding the Life Insurance segment, by Net premiums earned – excluding Life Insurance segment. Policy acquisition costs and administrative expenses for the Life Insurance segment were $943 million, $867 million, $833 million, $816 million, and $767 million for the years ended December 31, 2019, 2018, 2017, 2016, and 2015, respectively.
(3)
The combined ratio is the sum of Loss and loss expense ratio and the Underwriting and administrative expense ratio.


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ITEM 7. Management's Discussion and Analysis of Financial Condition and Results of Operations

The following is a discussion of our financial condition and results of operations financial condition, and liquidity and capital resources as of and for the yearyears ended December 31, 2020 and 2019 and comparisons between 2020 and 2019. This discussion should be read in conjunction with the consolidated financial statementsConsolidated Financial Statements and related Notes, under Item 8 of this Form 10-K. Comparisons between 2019 and 2018 have been omitted from this Form 10-K, but can be found in "Management's Discussion and Analysis of Financial Condition and Results of Operations" in Part II, Item 7 of our Form 10-K for the year ended December 31, 2019.

All comparisons in this discussion are to the corresponding prior year unless otherwise indicated. All dollar amounts are rounded. However, percent changes and ratios are calculated using whole dollars. Accordingly, calculations using rounded dollars may differ.



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35


Forward-Looking Statements
The Private Securities Litigation Reform Act of 1995 provides a “safe harbor” for forward-looking statements. Any written or oral statements made by us or on our behalf may include forward-looking statements that reflect our current views with respect to future events and financial performance. The words “believe,” “anticipate,” “estimate,” “project,” “should,” “plan,” “expect,” “intend,” “hope,” “feel,” “foresee,” “will likely result,” “will continue,” and variations thereof and similar expressions, identify forward-looking statements. These forward-looking statements are subject to certain risks, uncertainties, and other factors that could, should potential events occur, cause actual results to differ materially from such statements. These risks, uncertainties, and other factors, which are described in more detail under Part I, Item 1A, under Risk Factors, starting on page 19 and elsewhere herein and in other documents we file with the U.S. Securities and Exchange Commission (SEC), include but are not limited to:

actual amount of new and renewal business, premium rates, underwriting margins, market acceptance of our products, and risks associated with the introduction of new products and services and entering new markets; the competitive environment in which we operate, including trends in pricing or in policy terms and conditions, which may differ from our projections and changes in market conditions that could render our business strategies ineffective or obsolete;
losses arising out of natural or man-made catastrophes such as hurricanes, typhoons, earthquakes, floods, climate change (including effects on weather patterns; greenhouse gases; sea, land and air temperatures; sea levels; and rain and snow), nuclear accidents, or terrorism which could be affected by:
the number of insureds and ceding companies affected;
the amount and timing of losses actually incurred and reported by insureds;
the impact of these losses on our reinsurers and the amount and timing of reinsurance recoverable actually received;
the cost of building materials and labor to reconstruct properties or to perform environmental remediation following a catastrophic event; and
complex coverage and regulatory issues such as whether losses occurred from storm surge or flooding and related lawsuits;
actions that rating agencies may take from time to time, such as financial strength or credit ratings downgrades or placing these ratings on credit watch negative or the equivalent;
the ability to collect reinsurance recoverable, credit developments of reinsurers, and any delays with respect thereto and changes in the cost, quality, or availability of reinsurance;
catastrophes; actual loss experience from insured or reinsured events and the timing of claim payments;
the uncertainties of the loss-reserving and claims-settlement processes, including the difficulties associated with assessing environmental damage and asbestos-related latent injuries, the impact of aggregate-policy-coverage limits, the impact of bankruptcy protection sought by various asbestos producers and other related businesses, and the timing of loss payments;
infection rates and severity of COVID-19 and related risks, and their effects on our business operations and claims activity, and any adverse impact to our insureds, brokers, agents, and employees; actual claims may exceed our best estimate of ultimate insurance losses incurred through December 31, 2020 which could change including as a result of, among other things, the impact of legislative or regulatory actions taken in response to COVID-19;
changes in the distribution or placement of risks due to increased consolidation of insurance and reinsurance brokers; material differences between actual and expected assessments for guaranty funds and mandatory pooling arrangements; the ability to collect reinsurance recoverable, credit developments of reinsurers, and any delays with respect thereto and changes in the cost, quality, or availability of reinsurance;
uncertainties relating to governmental, legislative and regulatory policies, developments, actions, investigations, and treaties; judicial decisions and rulings, new theories of liability, legal tactics, and settlement terms; the effects of data privacy or cyber laws or regulation; global political conditions and possible business disruption or economic contraction that may result from such events;
developments in global financial markets, including changes in interest rates, stock markets, and other financial markets; increased government involvement or intervention in the financial services industry; the cost and availability of financing, and foreign currency exchange rate fluctuations; changing rates of inflation; and other general economic and business conditions, including the depth and duration of potential recession;
the availability of borrowings and letters of credit under our credit facilities; the adequacy of collateral supporting funded high deductible programs; the amount of dividends received from subsidiaries;
changes to our assessment as to whether it is more likely than not that we will be required to sell, or have the intent to sell, available for sale fixed maturity investments before their anticipated recovery;
infection rates and severity of pandemics and their effectsactions that rating agencies may take from time to time, such as financial strength or credit ratings downgrades or placing these ratings on our business operations and claims activity;
developments in global financial markets, including changes in interest rates, stock markets, and other financial markets, increased government involvement or intervention in the financial services industry, the cost and availability of financing, and foreign currency exchange rate fluctuations (which we refer to in this report as foreign exchange and foreign currency exchange), which could affect our statement of operations, investment portfolio, financial condition, and financing plans;
general economic and business conditions resulting from volatility in the stock and credit markets and the depth and duration of potential recession;
global political conditions, the occurrence of any terrorist attacks, including any nuclear, radiological, biological, or chemical events,watch negative or the outbreak and effects of war, and possible business disruption or economic contraction that may result from such events;equivalent;
the potential impact of the United Kingdom’s vote to withdraw from the European Union, including political, regulatory, social, and economic uncertainty and market and exchange rate volatility;
judicial decisions and rulings, new theories of liability, legal tactics, and settlement terms;


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the effects of public company bankruptcies and/orand accounting restatements, as well as disclosures by and investigations of public companies relating to possible accounting irregularities, and other corporate governance issues, including the effects of such events on:issues;
the capital markets;
the markets for directors and officers (D&O) and errors and omissions (E&O) insurance; and
claims and litigation arising out of such disclosures or practices by other companies;
uncertainties relating to governmental, legislative and regulatory policies, developments, actions, investigations, and treaties, which, among other things, could subject us to insurance regulation or taxation in additional jurisdictions or affect our current operations;
the effects of data privacy or cyber laws or regulation on our current or future business;
the actual amount of new and renewal business, market acceptance of our products, and risks associated with the introduction of new products and services and entering new markets, including regulatory constraints on exit strategies;
the competitive environment in which we operate, including trends in pricing or in policy terms and conditions, which may differ from our projections and changes in market conditions that could render our business strategies ineffective or obsolete;
acquisitions made by us performing differently than expected, our failure to realize anticipated expense-related efficiencies or growth from acquisitions, the impact of acquisitions on our pre-existing organization, or announced acquisitions not closing;
risks and uncertainties relating to our planned purchases of additional interests in Huatai Insurance Group Company LimitedCo., Ltd. (Huatai Group), including our ability to receive Chinese insurance regulatory approval and complete the purchases;
risks associated with being a Swiss corporation, including reduced flexibility with respect to certain aspects of capital management and the potential for additional regulatory burdens; share repurchase plans and share cancellations;
the potential impact from government-mandated insurance coverage for acts of terrorism;
the availability of borrowings and letters of credit under our credit facilities;
the adequacy of collateral supporting funded high deductible programs;
changes in the distribution or placement of risks due to increased consolidation of insurance and reinsurance brokers;
material differences between actual and expected assessments for guaranty funds and mandatory pooling arrangements;
the effects of investigations into market practices in the property and casualty (P&C) industry;
changing rates of inflation and other economic conditions, for example, recession;
the amount of dividends received from subsidiaries;
loss of the services of any of our executive officers without suitable replacements being recruited in a reasonable time frame;

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the ability of our technology resources, including information systems and security, to perform as anticipated such as with respect to preventing material information technology failures or third-party infiltrations or hacking resulting in consequences adverse to Chubb or its customers or partners;
the ability of our company to increase use of data analytics and technology as part of our business strategy and adapt to new technologies; and
management’s response to these factors and actual events (including, but not limited to, those described above).
The words “believe,” “anticipate,” “estimate,” “project,” “should,” “plan,” “expect,” “intend,” “hope,” “feel,” “foresee,” “will likely result,” or “will continue,” and variations thereof and similar expressions, identify forward-looking statements. You are cautioned not to place undue reliance on these forward-looking statements, which speak only as of their dates. We undertake no obligation to publicly update or review any forward-looking statements, whether as a result of new information, future events or otherwise.


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Overview
We operate through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. For more information on our segments refer to “Segment Information” under Item 1.

We have grown our business through increased premium volume, expansion of product offerings and geographic reach, and acquisitions of other companies. Refer to Note 2 to the Consolidated Financial Statements for our most recent acquisitions.

Our product and geographic diversification differentiatesdifferentiate us from the vast majority of our competitors and has been a source of stability during periods of industry volatility. Our long-term business strategy focuses on sustained growth in book value achieved through a combination of underwriting and investment income. By doing so, we provide value to our clients and shareholders through use of our substantial capital base in the insurance and reinsurance markets.

We are organized along a profit center structure by line of business and territory that does not necessarily correspond to corporate legal entities. Profit centers can access various legal entities subject to licensing and other regulatory rules. Profit centers are expected to generate underwriting income and appropriate risk-adjusted returns. Our corporate structure has facilitated the development of management talent by giving each profit center's senior management team the necessary autonomy within underwriting authorities to make operating decisions and create products and coverages needed by its target customer base. We are focused on delivering underwriting profit by only writing policies which we believe adequately compensate us for the risk we accept.

Our insurance and reinsurance operations generate gross revenues from two principal sources: premiums and investment income. Cash flow is generated from premiums collected and investment income received less paid losses and loss expenses, policy acquisition costs, and administrative expenses. Invested assets are substantially held in liquid, investment grade fixed income securities of relatively short duration. Claims payments in any short-term period are highly unpredictable due to the random nature of loss events and the timing of claims awards or settlements. The value of investments held to pay future claims is subject to market forces such as the level of interest rates, stock market volatility, and credit events such as corporate defaults. The actual cost of claims is also volatile based on loss trends, inflation rates, court awards, and catastrophes. We believe that our cash balance, our highly liquid investments, credit facilities, and reinsurance protection provide sufficient liquidity to meet unforeseen claim demands that might occur in the year ahead. Refer to “Liquidity” and “Capital Resources” for additional information.
information    .

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Financial Highlights for the Year Ended December 31, 20192020

Net income was $4,454 million$3.5 billion compared with $3,962$4.5 billion in 2019, including after-tax catastrophe losses of $2.8 billion compared with $966 million in 2018.2019.
The COVID-19 global pandemic and related economic conditions adversely impacted our results of operations and growth in 2020, including:
Net catastrophe losses included a COVID-19 charge of $1,396 million pre-tax ($1,193 million after-tax), generated primarily from entertainment and commercial property-related business interruption, liability insurance products, and workers’ compensation. These COVID-19 losses added 4.5 percentage points to the P&C combined ratio.
Net premiums written in consumer lines globally declined by 1.9 percent, or 0.9 percent on a constant-dollar basis, principally reflecting the impact of COVID-19. A&H lines experienced negative growth globally and were down 10.6 percent for the year. Partially offsetting the decline was our U.S. high net worth personal lines business, which grew 2.8 percent in 2020.
Net premiums written were $32.3$33.8 billion, up 5.54.8 percent, or 7.05.5 percent on a constant-dollar basis.
The North America Agricultural Insurance segment combined ratio was 95.1basis with 9.3 percent compared with 75.5 percentgrowth in 2018, orcommercial lines and a decline of $296 million0.9 percent in underwriting income, principally dueconsumer lines. Refer to the downward revisionpage 49 for more detail.
Net premiums earned were $33.1 billion, up 5.8 percent, or 6.5 percent on a constant-dollar basis with growth in the 2019 crop year margin estimate reflecting preventive planting claims due to the impactcommercial lines of wet weather conditions8.9 percent and crop yield shortfalls resulting from poor growing conditions.consumer lines of 2.5 percent.
P&C combined ratio was 96.1 percent compared with 90.6 percent in both 2019 and 2018.2019. P&C current accident year combined ratio excluding catastrophe losses was 89.286.7 percent compared with 88.089.2 percent in 2018, reflecting2019.
Total pre-tax and after-tax catastrophe losses, including reinstatement premiums, were $3.3 billion and $2.8 billion, respectively, compared with $1.2 billion and $966 million, respectively, in 2019. Refer to the increase in the North America Agricultural Insurance segment combined ratio noted above.Consolidated Operating Results section for additional information on our catastrophe losses.
Total pre-tax and after-tax catastrophe losses, including reinstatement premiums, were $1,187 million (4.1 percentage points of the combined ratio) and $966 million, respectively, compared with $1,626 million (5.9 percentage points of the combined ratio) and $1,354 million, respectively, in 2018. Refer to the Consolidated Operating Results section for additional information on our catastrophe losses.
Total pre-tax and after-tax favorable prior period development were $395 million (1.2 percentage points of the combined ratio) and $357 million, respectively, compared with $792 million (2.7 percentage points of the combined ratio) and $624 million, respectively, in 2019.
Operating cash flow was $9.8 billion compared with $896 million (3.3 percentage points$6.3 billion in 2019, an increase of $3.4 billion primarily due to higher premiums collected and reduced payment activity due to the combined ratio) and $706 million, respectively, in 2018. Pre-tax favorable prior period development in 2018 included favorable reinsurance settlements of $205 millioneconomic slowdown related to legacy run-off exposures.COVID-19 pandemic. Refer to the Liquidity section for additional information on our cash flows.


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Operating cash flow was $6,342 million compared with $5,480 million in 2018, an increase of $862 million primarily due to higher underwriting cash flow. Refer to the Liquidity section for additional information on our cash flows.
Net investment income was $3,426$3,375 million compared with $3,305$3,426 million in 2018.2019.
Share repurchases totaled $516 million, or approximately 3.6 million shares for the year, at an average purchase price of $143.91 per share.
Shareholders’ equity increased 7.4 percent during the year, principally reflecting strong underlying growth and realized and unrealized gains in our investment portfolio.$1,531 million, or approximately 10.4 million shares for the year, at an average purchase price of $146.61 per share.

Outlook

Our premium growth in 2020 reflected increases in commercial P&C lines globally from new business, positive rate increases and higher renewal retention. This growth was tempered by decreases in consumer lines, primarily from outside North America, reflecting the adverse impact of the economic contraction resulting from the COVID-19 pandemic.

Looking forward, we are off to a good start to the year in the first quarter with both growth and the level of commercial P&C rate increases resembling the underwriting conditions of the fourth quarter. We completed 2019 with net premiums written growth of 5.5 percent, or 7.0 percent on a constant-dollar basis. Premium growth accelerated globally withexpect the current pricingmarket condition to continue which will allow us to continue to grow revenue and expand underwriting environment, which hasmargins in our commercial lines. For consumer lines, growth globally in the fourth quarter of 2020 continued to improve in morebe impacted by the pandemic's effects on consumer-related activities. Our international personal lines of business and more territories. We plan to use our global presenceA&H business together shrank eight percent. We expect growth to capitalize onreturn in these market conditions inbusinesses as the year ahead, while continuing to focus on our long-term strategic growth initiatives.progresses.

Our net investment income increased 3.6 percent in 2019, reflecting strong operating cash flow and a higher invested asset base. There are several factors that impact the variability in investment income, including interest rates and private equity distributions. Nevertheless, we expect our quarterly pre-tax net investment income in 2020 to be in the range of $852 million to $862 million, including the expected amortization of the fair value adjustment on acquired invested assets, at current exchange rates, of approximately $33 million per quarter. Excluding the amortization of the fair value adjustment on acquired invested assets, we expect quarterly pre-tax adjusted net investment income in 2020 to be in the range of $885 million to $895 million. The estimate of amortization expense of the fair value adjustment on acquired invested assets could vary materially based on current market conditions, bond calls, overall duration of the acquired investment portfolio, and foreign exchange.

DuringIn 2019, Chubb increased itsentered into agreements to acquire an additional 22.4 percent ownership interest in Huatai Group and is committed to acquire additional interests withthrough two separate purchases. The first purchase, which was for a 15.3 percent interest, was completed in July 2020. We expect that the goalsecond purchase, which was for a 7.1 percent interest, will be completed in the future, contingent upon important conditions. Separately, in November 2020, we completed the purchase of majority and beyond ownership. To that end, Chubb entered into agreements to purchase an additional 22.4incremental 0.9 percent ownership interest in Huatai Group, through separate purchasesbringing Chubb’s aggregate ownership interest to 47.1 percent as of 15.3 percent and 7.1 percent, respectively, each contingent upon regulatory approvals and other important conditions. At the completion ofDecember 31, 2020. We continue to apply equity method accounting until we complete the 7.1 percent purchase, which is expected by the end of 2021, Chubb is expectedwill result in majority ownership at which point we expect to apply consolidation accounting.

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Critical Accounting Estimates
Our consolidated financial statementsConsolidated Financial Statements include amounts that, either by their nature or due to requirements of generally accepted accounting principles in the U.S. (GAAP), are determined using best estimates and assumptions. While we believe that the amounts included in our consolidated financial statementsConsolidated Financial Statements reflect our best judgment, actual amounts could ultimately materially differ from those currently presented. We believe the items that require the most subjective and complex estimates are:

unpaid loss and loss expense reserves, including long-tail asbestos and environmental (A&E) reserves and non-A&E casualty exposures;
future policy benefits reserves;
the valuation of value of business acquired (VOBA) and amortization of deferred policy acquisition costs and VOBA;
the assessment of risk transfer for certain structured insurance and reinsurance contracts;
reinsurance recoverable, including a provisionvaluation allowance for uncollectible reinsurance;
the valuation of our investment portfolio and assessment of other-than-temporary impairments (OTTI);valuation allowance for expected credit losses;
the valuation of deferred income taxes;
the valuation of derivative instruments related to guaranteed living benefits (GLB); and
the assessment of goodwill for impairment.

We believe our accounting policies for these items are of critical importance to our consolidated financial statements.Consolidated Financial Statements. The following discussion provides more information regarding the estimates and assumptions required to arrive at these amounts and should be read in conjunction with the sections entitled: Prior Period Development, Asbestos and Environmental (A&E), Reinsurance Recoverable on Ceded Reinsurance, Investments, and Net Realized and Unrealized Gains (Losses), and Other Income and Expense Items..



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Unpaid losses and loss expenses
As an insurance and reinsurance company, we are required by applicable laws and regulations and GAAP to establish loss and loss expense reserves for the estimated unpaid portion of the ultimate liability for losses and loss expenses under the terms of our policies and agreements with our insured and reinsured customers. At December 31, 2019,2020, our gross unpaid loss and loss expense reserves were $62.7$67.8 billion and our net unpaid loss and loss expense reserves were $48.5$53.2 billion. With the exception of certain structured settlements, for which the timing and amount of future claim payments are reliably determinable, and certain reserves for unsettled claims, our loss reserves are not discounted for the time value of money. In connection with such structured settlements and certain reserves for unsettled claims, we carried net discounted reserves of $74$68 million and $73$74 million at December 31, 20192020 and 2018,2019, respectively.

The following table presents a roll-forward of our unpaid losses and loss expenses:
December 31, 2019  December 31, 2018 December 31, 2020December 31, 2019
(in millions of U.S. dollars)Gross Losses
 
Reinsurance Recoverable(1)

 Net Losses
 Gross Losses
 
Reinsurance Recoverable(1)

 Net Losses
(in millions of U.S. dollars)Gross Losses
Reinsurance Recoverable(1)
Net LossesGross Losses
Reinsurance Recoverable(1)
Net Losses
Balance, beginning of year$62,960
 $14,689
 $48,271
 $63,179
 $14,014
 $49,165
Balance, beginning of year$62,690 $14,181 $48,509 $62,960 $14,689 $48,271 
Losses and loss expenses incurred23,657
 4,927
 18,730
 23,645
 5,578
 18,067
Losses and loss expenses incurred26,711 5,001 21,710 23,657 4,927 18,730 
Losses and loss expenses paid(23,911) (5,438) (18,473) (23,079) (4,739) (18,340)Losses and loss expenses paid(22,053)(4,619)(17,434)(23,911)(5,438)(18,473)
Other (including foreign exchange translation)(16) 3
 (19) (785) (164) (621)Other (including foreign exchange translation)463 84 379 (16)(19)
Balance, end of year$62,690
 $14,181
 $48,509
 $62,960
 $14,689
 $48,271
Balance, end of year$67,811 $14,647 $53,164 $62,690 $14,181 $48,509 
(1)
(1)Net of valuation allowance for uncollectible reinsurance.

Net of provision for uncollectible reinsurance.

The estimate of the liabilities includes provisions for claims that have been reported but are unpaid at the balance sheet date (case reserves) and for obligations on claims that have been incurred but not reported (IBNR) at the balance sheet date. IBNR may also include provisions to account for the possibility that reported claims may settle for amounts that differ from the established case reserves. Loss reserves also include an estimate of expenses associated with processing and settling unpaid

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claims (loss expenses). Our loss reserves comprise approximately 8078 percent casualty-related business, which typically encompasses long-tail risks, and other risks where a high degree of judgment is required.

The process of establishing loss reserves for property and casualty claims can be complex and is subject to considerable uncertainty as it requires the use of informed estimates and judgments based on circumstances underlying the insured losses known at the date of accrual. For example, the reserves established for high excess casualty claims, asbestos and environmental claims, claims from major catastrophic events, or for our various product lines each require different assumptions and judgments to be made. Necessary judgments are based on numerous factors and may be revised as additional experience and other data become available and are reviewed, as new or improved methods are developed, or as laws change. Hence, ultimate loss payments may differ from the estimate of the ultimate liabilities made at the balance sheet date. Changes to our previous estimates of prior period loss reserves impact the reported calendar year underwriting results adversely if our estimates increase or favorably if our estimates decrease. The potential for variation in loss reserve estimates is impacted by numerous factors. Reserve estimates for casualty lines are particularly uncertain given the lengthy reporting patterns and corresponding need for IBNR.

Case reserves for those claims reported by insureds or ceding companies to us prior to the balance sheet date and where we have sufficient information are determined by our claims personnel as appropriate based on the circumstances of the claim(s), standard claim handling practices, and professional judgment. Furthermore, for our Brandywine run-off operations and our
assumed reinsurance operation, Global Reinsurance, we may adjust the case reserves as notified by the ceding company if the judgment of our respective claims department differs from that of the cedant.

With respect to IBNR reserves and those claims that have been incurred but not reported prior to the balance sheet date, there is, by definition, limited actual information to form the case reserve estimate and reliance is placed upon historical loss experience and actuarial methods to estimate the ultimate loss obligations and the corresponding amount of IBNR. IBNR reserve estimates are generally calculated by first projecting the ultimate amount of losses for a product line and subtracting paid losses and case reserves for reported claims. The judgments involved in projecting the ultimate losses may pertain to the use and interpretation of various standard actuarial reserving methods that place reliance on the extrapolation of actual historical data, loss development patterns, industry data, and other benchmarks as appropriate. The estimate of the required IBNR reserve also requires judgment by actuaries and management to reflect the impact of more contemporary and subjective factors, both qualitative and quantitative. Among some of these factors that might be considered are changes in business mix or


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volume, changes in ceded reinsurance structures, changes in claims handling practices, reported and projected loss trends, inflation, the legal environment, and the terms and conditions of the contracts sold to our insured parties.

Determining management's best estimate
Our recorded reserves represent management's best estimate of the provision for unpaid claims as of the balance sheet date, and establishing them involves a process that includes collaboration with various relevant parties in the company. For information on our reserving process, refer to Note 7 to the Consolidated Financial Statements.

Sensitivity to underlying assumptions
While we believe that our reserve for unpaid losses and loss expenses at December 31, 2019,2020, is adequate, new information or emerging trends that differ from our assumptions may lead to future development of losses and loss expenses that is significantly greater or less than the recorded reserve, which could have a material effect on future operating results. As noted previously, our best estimate of required loss reserves for most portfolios is judgmentally selected for each origin year after considering the results from a number of reserving methods and is not a purely mechanical process. Therefore, it is difficult to convey, in a simple and quantitative manner, the impact that a change to a single assumption will have on our best estimate. In the examples below, we attempt to give an indication of the potential impact by isolating a single change for a specific reserving method that would be pertinent in establishing the best estimate for the product line described. We consider each of the following sensitivity analyses to represent a reasonably likely deviation in the underlying assumption.

North America Commercial P&C Insurance - Workers' Compensation
Given the long reporting and paid development patterns for workers' compensation business, the development factors used to project actual current losses to ultimate losses for our current exposure require considerable judgment that could be material to consolidated loss and loss expense reserves. Specifically, adjusting ground up ultimate losses by a one percentpercentage point change in the tail factor (i.e., 1.04 changed to either 1.05 or 1.03) would cause a change of approximately $823$910 million, either positive or negative, for the projected net loss and loss expense reserves. This represents an impact of about 8.89.5 percent relative to recorded net loss and loss expense reserves of approximately $9.4$9.6 billion.


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North America Commercial P&C Insurance – Liability
As is the case for Workers’ Compensation above, given the long reporting and paid development patterns, the development factors used to project actual current losses to ultimate losses for our current exposure require considerable judgment that could be material to consolidated loss and loss expense reserves. Specifically, for our main U.S. Excess/Umbrella portfolios, a five percentage point change in the tail factor (e.g., 1.10 changed to either 1.15 or 1.05) would cause a change of approximately $546 million, either positive or negative, for the projected net loss and loss expense reserves. This represents an impact of about 19.7 percent relative to recorded net loss and loss expense reserves of approximately $2.8 billion for these portfolios.

The reserve portfolio for our Chubb Bermuda operations contains exposure to predominantly high excess liability coverage on an occurrence-first-reported basis (typically with attachment points in excess of $325 million and gross limits of up to $150 million) and D&O and other professional liability coverage on a claims-made basis (typically with attachment points in excess of $125 million and gross limits of up to $75 million). Due to the layer of exposure covered, the expected frequency for this book is very low. As a result of the low frequency/high severity nature of the book, a small difference in the actual vs. expected claim frequency, either positive or negative, could result in a material change to the projected ultimate loss if such change in claim frequency was related to a policy where close to maximum limits were deployed.

North America Personal P&C Insurance
Due to the relatively short-tailed nature of many of the coverages involved (e.g., homeowners property damage), most of the incurred losses in Personal Lines are resolved within a few years of occurrence. As shown in our loss triangle disclosure, the vast majority (over(approximately 95 percent) of Personal Lines net ultimate losses and allocated loss adjustment expenses are typically paid within five years of the accident date and over 80 percent within two years. Even though there are significant reserves associated with some liability exposures such as personal excess/umbrella liability, our incurred loss triangle also shows a roughly consistent pattern of only relatively minor movements in incurred estimates over time by accident year especially after twenty-four months of maturity. While the liability exposures are subject to additional uncertainties from more protracted resolution times, the main drivers of volatility in the Personal Lines business are relatively short-term in nature and relate to things like natural catastrophes, non-catastrophe weather events, man-made risks, and individual large loss volatility from other fortuitous claim events.

North America Agricultural Insurance
Approximately 6659 percent of the reserves for this segment are from the crop related lines, which all have short payout patterns, with the majority of the liabilities expected to be resolved in the ensuing twelve months. Claim reserves for our Multiple Peril Crop Insurance (MPCI) product are set on a case-by-case basis and our aggregate exposure is subject to state level risk sharing formulae as well as third-party reinsurance. The majority of the development risk arises out of the accuracy of case reserve estimates and the time needed for final crop conditions to be assessed. We do not view our Agriculture reserves as substantially influenced by the general assumptions and risks underlying more typical P&C reserve estimates.



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Overseas General Insurance
Certain long-tail lines, such as casualty and professional lines, are particularly susceptible to changes in loss trend and claim inflation. Heightened perceptions of tort and settlement awards around the world can increase the demand for these products as well as contributing to the uncertainty in the reserving estimates. Our reserving methods rely on loss development patterns estimated from historical data and while we attempt to adjust such factors for known changes in the current tort environment, it is possible that such factors may not entirely reflect all recent trends in tort environments. For example, when applying the reported loss development method, the lengthening of our selected loss development patterns by six months would increase reserve estimates on long-tail casualty and professional lines for accident years 20172018 and prior by approximately $525$590 million. This represents an impact of 14.415.4 percent relative to recorded net loss and loss expense reserves of approximately $3.6$3.8 billion.

Global Reinsurance
Typically, there is inherent uncertainty around the length of paid and reported development patterns, especially for certain casualty lines such as excess workers' compensation or general liability, which may take decades to fully develop. This uncertainty is accentuated by the need to supplement client development patterns with industry development patterns due to the sometimes low statistical credibility of the data. The underlying source and selection of the final development patterns can thus have a significant impact on the selected ultimate
At December 31, 2020, net unpaid losses and loss expenses. For example, a 20 percent shortening or lengtheningexpenses for the Global Reinsurance segment aggregated to $1.5 billion, consisting of the development patterns used for U.S. long-tail lines would cause the loss reserve estimate derived by the reported Bornhuetter-Ferguson method for these lines to change by approximately $285 million. This represents an impact$772 million of 43 percent relative to recorded net losscase reserves and loss expense reserves$740 million of approximately $670 million.

Assumed reinsurance
AtIBNR. In comparison, at December 31, 2019, net unpaid losses and loss expenses for the Global Reinsurance segment aggregated to $1.4 billion, consisting of $769 million of case reserves and $664 million of IBNR. In comparison, at December 31, 2018, net unpaid losses and loss expenses for the Global Reinsurance segment aggregated to $1.6 billion, consisting of $807 million of case reserves and $807 million of IBNR.

For our catastrophe business, we principally estimate unpaid losses and loss expenses on an event basis by considering various sources of information, including specific loss estimates reported by our cedants, ceding company and overall industry loss estimates reported by our brokers, and our internal data regarding reinsured exposures related to the geographical location of the

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event. Our internal data analysis enables us to establish catastrophe reserves for known events with more certainty at an earlier date than would be the case if we solely relied on reports from third parties to determine carried reserves.

For our casualty reinsurance business, we generally rely on ceding companies to report claims and then use that data as a key input to estimate unpaid losses and loss expenses. Due to the reliance on claims information reported by ceding companies, as well as other factors, the estimation of unpaid losses and loss expenses for assumed reinsurance includes certain risks and uncertainties that are unique relative to our direct insurance business. These include, but are not necessarily limited to, the following:

The reported claims information could be inaccurate;
Typically, a lag exists between the reporting of a loss event to a ceding company and its reporting to us as a reinsurance claim. The use of a broker to transmit financial information from a ceding company to us increases the reporting lag. Because most of our reinsurance business is produced by brokers, ceding companies generally first submit claim and other financial information to brokers, who then report the proportionate share of such information to each reinsurer of a particular treaty. The reporting lag generally results in a longer period of time between the date a claim is incurred and the date a claim is reported compared with direct insurance operations. Therefore, the risk of delayed recognition of loss reserve development is higher for assumed reinsurance than for direct insurance lines; and
The historical claims data for a particular reinsurance contract can be limited relative to our insurance business in that there may be less historical information available. Further, for certain coverages or products, such as excess of loss contracts, there may be relatively few expected claims in a particular year so the actual number of claims may be susceptible to significant variability. In such cases, the actuary often relies on industry data from several recognized sources.

We mitigate the above risks in several ways. In addition to routine analytical reviews of ceding company reports to ensure reported claims information appears reasonable, we perform regular underwriting and claims audits of certain ceding companies to ensure reported claims information is accurate, complete, and timely. As appropriate, audit findings are used to adjust claims


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in the reserving process. We also use our knowledge of the historical development of losses from individual ceding companies to adjust the level of adequacy we believe exists in the reported ceded losses.

On occasion, there will be differences between our carried loss reserves and unearned premium reserves and the amount of loss reserves and unearned premium reserves reported by the ceding companies. This is due to the fact that we receive consistent and timely information from ceding companies only with respect to case reserves. For IBNR, we use historical experience and other statistical information, depending on the type of business, to estimate the ultimate loss. We estimate our unearned premium reserve by applying estimated earning patterns to net premiums written for each treaty based upon that treaty's coverage basis (i.e., risks attaching or losses occurring). At December 31, 2019,2020, the case reserves, net of retrocessions, reported to us by our ceding companies were $758$762 million, compared with the $769$772 million we recorded.  Our policy is to post additional case reserves in addition to the amounts reported by our cedants when our evaluation of the ultimate value of a reported claim is different than the evaluation of that claim by our cedant.

Typically, there is inherent uncertainty around the length of paid and reported development patterns, especially for certain casualty lines such as excess workers' compensation or general liability, which may take decades to fully develop. This uncertainty is accentuated by the need to supplement client development patterns with industry development patterns due to the sometimes low statistical credibility of the data. The underlying source and selection of the final development patterns can thus have a significant impact on the selected ultimate net losses and loss expenses. For example, a 20 percent shortening or lengthening of the development patterns used for U.S. long-tail lines would cause the loss reserve estimate derived by the reported Bornhuetter-Ferguson method for these lines to change by approximately $245 million. This represents an impact of 37 percent relative to recorded net loss and loss expense reserves of approximately $655 million.

Corporate
Within Corporate, we also have exposure to certain liability reinsurance lines that have been in run-off since 1994. Unpaid losses and loss expenses relating to this run-off reinsurance business resides within the Brandywine Division reported within Corporate. Most of the remaining unpaid loss and loss expense reserves for the run-off reinsurance business relate to A&E claims. Refer to the “Asbestos and Environmental (A&E)” section for additional information.

Asbestos and environmental reserves
Included in our liabilities for losses and loss expenses are amounts for A&E (A&E liabilities). The A&E liabilities principally relate to claims arising from bodily-injury claims related to asbestos products and remediation costs associated with hazardous waste sites. The estimation of our A&E liabilities is particularly sensitive to future changes in the legal, social, and economic environment. We have not assumed any such future changes in setting the value of our A&E liabilities, which include provisions for both reported and IBNR claims.

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There are many complex variables that we consider when estimating the reserves for our inventory of asbestos accounts and these variables may directly impact the predicted outcome. We believe the most significant variables relating to our A&E liabilities include the current legal environment; specific settlements that may be used as precedents to settle future claims; assumptions regarding trends with respect to claim severity and the frequency of higher severity claims; assumptions regarding the ability to allocate liability among defendants (including bankruptcy trusts) and other insurers; the ability of a claimant to bring a claim in a state in which they have no residency or exposure; the ability of a policyholder to claim the right to unaggregated coverage; whether high-level excess policies have the potential to be accessed given the policyholder's claim trends and liability situation; payments to unimpaired claimants; and, the potential liability of peripheral defendants. Based on the policies, the facts, the law, and a careful analysis of the impact that these factors will likely have on any given account, we estimate the potential liability for indemnity, policyholder defense costs, and coverage litigation expense.

The results in asbestos cases announced by other carriers or defendants may well have little or no relevance to us because coverage exposures are highly dependent upon the specific facts of individual coverage and resolution status of disputes among carriers, policyholders, and claimants.

For additional information refer to the “Asbestos and Environmental (A&E)” section and to Note 7 to the Consolidated Financial Statements.

Future policy benefits reserves
We issue contracts in our Overseas General Insurance and Life Insurance segments that are classified as long-duration. These contracts generally include accident and supplemental health products, term and whole life products, endowment products, and annuities. In accordance with GAAP, we establish reserves for contracts determined to be long-duration based on approved actuarial methods that include assumptions related to expenses, mortality, morbidity, persistency and investment yields withyields. For traditional long-duration contracts, these assumptions also include a factorprovision for adverse deviation. These assumptionsdeviation (PAD), and are “locked in” at the inception of the contract, meaning we use our original assumptions throughout the life of the policy and do not subsequently modify them unless we deem the reserves to be inadequate.inadequate; while for non-traditional long-duration contracts, the assumptions do not include a PAD and are unlocked at each reporting date. The future policy benefits reserves balance is regularly evaluated for a premium deficiency. If experience is less favorable than assumptions, additional liabilities may be required, resulting in a charge to policyholder benefits and claims.

Valuation of value of business acquired (VOBA), and amortization of deferred policy acquisition costs and VOBA
As part of the acquisition of businesses that sell long-duration contracts, such as life products, we established an intangible asset related to VOBA, which represented the fair value of the future profits of the in-force contracts. The valuation of VOBA at the time of acquisition is derived from similar assumptions to those used to establish the associated future policy benefits


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reserves. The most significant input in this calculation is the discount rate used to arrive at the present value of the net cash flows. We amortize deferred policy acquisition costs associated with long-duration contracts and VOBA (collectively policy acquisition costs) over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to estimates of expected gross profits. The estimated life is established at the inception of the contracts or upon acquisition and is based on current persistency assumptions. Policy acquisition costs, which consist of commissions, premium taxes, and certain underwriting costs related directly to the successful acquisition of a new or renewal insurance contract, are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable costs are expensed in the period identified.

Risk transfer
In the ordinary course of business, we both purchase (or cede) and sell (or assume) reinsurance protection. We discontinued the purchase of all finite risk reinsurance contracts, as a matter of policy, in 2002. For both ceded and assumed reinsurance, risk transfer requirements must be met in order to use reinsurance accounting, principally resulting in the recognition of cash flows under the contract as premiums and losses. If risk transfer requirements are not met, a contract is to be accounted for as a deposit, typically resulting in the recognition of cash flows under the contract through a deposit asset or liability and not as revenue or expense. To meet risk transfer requirements, a reinsurance contract must include both insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. We also apply similar risk transfer requirements to determine whether certain commercial insurance contracts should be accounted for as insurance or a deposit. Contracts that include fixed premium (i.e., premium not subject to adjustment based on loss experience under the contract) for fixed coverage generally transfer risk and do not require judgment.


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Reinsurance and insurance contracts that include both significant risk sharing provisions, such as adjustments to premiums or loss coverage based on loss experience, and relatively low policy limits, as evidenced by a high proportion of maximum premium assessments to loss limits, can require considerable judgment to determine whether or not risk transfer requirements are met. For such contracts, often referred to as finite or structured products, we require that risk transfer be specifically assessed for each contract by developing expected cash flow analyses at contract inception. To support risk transfer, the cash flow analyses must demonstrate that a significant loss is reasonably possible, such as a scenario in which the ratio of the net present value of losses divided by the net present value of premiums equals or exceeds 110 percent. For purposes of cash flow analyses, we generally use a risk-free rate of return consistent with the expected average duration of loss payments. In addition, to support insurance risk, we must prove the reinsurer's risk of loss varies with that of the reinsured and/or support various scenarios under which the assuming entity can recognize a significant loss.

To ensure risk transfer requirements are routinely assessed, qualitative and quantitative risk transfer analyses and memoranda supporting risk transfer are developed by underwriters for all structured products. We have established protocols for structured products that include criteria triggering an accounting review of the contract prior to quoting. If any criterion is triggered, a contract must be reviewed by a committee established by each of our segments with reporting oversight, including peer review, from our global Structured Transaction Review Committee.

With respect to ceded reinsurance, we entered into a few multi-year excess of loss retrospectively-rated contracts, principally in 2002. These contracts primarily provided severity protection for specific product divisions. Because traditional one-year reinsurance coverage had become relatively costly, these contracts were generally entered into in order to secure a more cost-effective reinsurance program. All of these contracts transferred risk and were accounted for as reinsurance. In addition, we maintain a few aggregate excess of loss reinsurance contracts that were principally entered into prior to 2003, such as the National Indemnity Company (NICO) contracts referred to in the section entitled, “Asbestos and Environmental (A&E)”. We have not purchased any other retroactive ceded reinsurance contracts since 1999.

With respect to assumed reinsurance and insurance contracts, products giving rise to judgments regarding risk transfer were primarily sold by our financial solutions business. Although we have significantly curtailed writing financial solutions business, several contracts remain in-force and principally include multi-year retrospectively-rated contracts and loss portfolio transfers. Because transfer of insurance risk is generally a primary client motivation for purchasing these products, relatively few insurance and reinsurance contracts have historically been written for which we concluded that risk transfer criteria had not been met. For certain insurance contracts that have been reported as deposits, the insured desired to self-insure a risk but was required, legally or otherwise, to purchase insurance so that claimants would be protected by a licensed insurance company in the event of non-payment from the insured.



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Reinsurance recoverable
Reinsurance recoverable includes balances due to us from reinsurance companies for paid and unpaid losses and loss expenses and is presented net of a provisionvaluation allowance for uncollectible reinsurance. The provisionvaluation allowance for uncollectible reinsurance is determined based upon a review of the financial condition of the reinsurers and other factors. Ceded reinsurance contracts do not relieve our primary obligation to our policyholders. Consequently, an exposure exists with respect to reinsurance recoverable to the extent that any reinsurer is unable or unwilling to meet its obligations or disputes the liabilities assumed under the reinsurance contracts. We determine the reinsurance recoverable on unpaid losses and loss expenses using actuarial estimates as well as a determination of our ability to cede unpaid losses and loss expenses under existing reinsurance contracts.

The recognition of a reinsurance recoverable asset requires two key judgments. The first judgment involves our estimation based on the amount of gross reserves and the percentage of that amount which may be ceded to reinsurers. Ceded IBNR, which is a major component of the reinsurance recoverable on unpaid losses and loss expenses, is generally developed as part of our loss reserving process and, consequently, its estimation is subject to similar risks and uncertainties as the estimation of gross IBNR (refer to “Critical Accounting Estimates – Unpaid losses and loss expenses”). The second judgment involves our estimate of the amount of the reinsurance recoverable balance that we may ultimately be unable to recover from reinsurers due to insolvency, contractual dispute, or for other reasons. Estimated uncollectible amounts are reflected in a provisionvaluation allowance that reduces the reinsurance recoverable asset and, in turn, shareholders' equity. Changes in the provisionvaluation allowance for uncollectible reinsurance are reflected in net income.


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Although the obligation of individual reinsurers to pay their reinsurance obligations is based on specific contract provisions, the collectability of such amounts requires estimation by management. The majority of the recoverable balance will not be due for collection until sometime in the future, and the duration of our recoverables may be longer than the duration of our direct exposures. Over this period of time, economic conditions and operational performance of a particular reinsurer may impact their ability to meet these obligations and while they may continue to acknowledge their contractual obligation to do so, they may not have the financial resources or willingness to fully meet their obligation to us.

To estimate the provisionvaluation allowance for uncollectible reinsurance, the reinsurance recoverable must first be determined for each reinsurer. This determination is based on a process rather than an estimate, although an element of judgment must be applied. As part of the process, ceded IBNR is allocated to reinsurance contracts because ceded IBNR is not generally calculated on a contract by contract basis. The allocations are generally based on premiums ceded under reinsurance contracts, adjusted for actual loss experience and historical relationships between gross and ceded losses. If actual premium and loss experience vary materially from historical experience, the allocation of reinsurance recoverable by reinsurer will be reviewed and may change. While such change is unlikely to result in a large percentage change in the provisionvaluation allowance for uncollectible reinsurance, it could, nevertheless, have a material effect on our net income in the period recorded.

Generally, we use a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and forward looking default factors used to estimate the probability that the reinsurer may be unable to meet its future obligations in full. In 2020, we adopted new guidance on the accounting for expected credit losses of reinsurance recoverable. For additional information, refer to Note 1 s) to the Consolidated Financial Statements under Item 8. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held by us with the same legal entity for which we believe there is a right of offset. We do not currently include multi-beneficiary trusts. However, we have several reinsurers that have established multi-beneficiary trusts for which certain of our companies are beneficiaries. The determination of the default factor is principally based on the financial strength rating of the reinsurer and a corresponding default factor applicable to the financial strength rating. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. Significant considerations and assumptions include, but are not necessarily limited to, the following:

For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the judgment exercised by management to determine the provisionvaluation allowance for uncollectible reinsurance of each reinsurer is typically limited because the financial rating is based on a published source and the default factor we apply is based on a historical default factor of a major rating agency applicable to the particular rating class. Default factors applied for financial ratings of AAA, AA, A, BBB, BB, B, and CCC, are 0.8 percent, 1.2 percent, 1.7 percent, 4.9 percent, 19.6 percent, 34.0 percent, and 62.2 percent, respectively. Because our model is predicated on the historical default factors of a major rating agency, we do not generally consider alternative factors. However, when a recoverable is expected to be paid in a brief period of time by a highly-rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;


45


For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent or affiliated company, we may determine a rating equivalent based on our analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which our ceded reserve is below a certain threshold, we generally apply a default factor of 34.0 percent;
For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting provisionvaluation allowance for uncollectible reinsurance based on specific facts and circumstances surrounding each company. Upon initial notification of an insolvency, we generally recognize expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the provisionvaluation allowance for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the provisionvaluation allowance for uncollectible reinsurance by establishing a default factor pursuant to information received; and
For captives and other recoverables, management determines the provisionvaluation allowance for uncollectible reinsurance based on the specific facts and circumstances.

44


The following table summarizes reinsurance recoverables and the provisionvaluation allowance for uncollectible reinsurance for each type of recoverable balance at December 31, 2019:2020:
Gross Reinsurance Recoverables on Losses and Loss ExpensesRecoverables (net of Usable Collateral)
Valuation Allowance for Uncollectible Reinsurance (1)
(in millions of U.S. dollars)
Type
Reinsurers with credit ratings$12,479 $10,814 $179 
Reinsurers not rated290 154 57 
Reinsurers under supervision and insolvent reinsurers64 60 35 
Captives2,107 372 11 
Other - structured settlements and pools966 965 32 
Total$15,906 $12,365 $314 
  Gross Reinsurance Recoverables on Losses and Loss Expenses
 Recoverables (net of Usable Collateral)
  
    
Provision for Uncollectible Reinsurance (1)

(in millions of U.S. dollars)   
Type      
Reinsurers with credit ratings $11,460
 $10,043
 $156
Reinsurers not rated 321
 190
 66
Reinsurers under supervision and insolvent reinsurers 81
 79
 37
Captives 2,647
 378
 20
Other - structured settlements and pools 988
 978
 37
Total $15,497
 $11,668
 $316
(1)The valuation allowance for uncollectible reinsurance is based on a default analysis applied to gross reinsurance recoverables, net of approximately $3.5 billion of collateral at December 31, 2020.
(1)

The provision for uncollectible reinsurance is based on a default analysis applied to gross reinsurance recoverables, net of approximately $3.8 billion of collateral at December 31, 2019.

At December 31, 2019,2020, the use of different assumptions within our approach could have a material effect on the provisionvaluation allowance for uncollectible reinsurance. To the extent the creditworthiness of our reinsurers werewas to deteriorate due to an adverse event affecting the reinsurance industry, such as a large number of major catastrophes, actual uncollectible amounts could be significantly greater than our provisionvaluation allowance for uncollectible reinsurance. Such an event could have a material adverse effect on our financial condition, results of operations, and our liquidity. Given the various considerations used to estimate our uncollectible provision,valuation allowance, we cannot precisely quantify the effect a specific industry event may have on the provisionvaluation allowance for uncollectible reinsurance. However, based on the composition (particularly the average credit quality) of the reinsurance recoverable balance at December 31, 2019,2020, we estimate that a ratings downgrade of one notch for all rated reinsurers (e.g., from A to A- or A- to BBB+) could increase our provisionvaluation allowance for uncollectible reinsurance by approximately $66$81 million or approximately 0.40.5 percent of the gross reinsurance recoverable balance, assuming no other changes relevant to the calculation. While a ratings downgrade would result in an increase in our provisionvaluation allowance for uncollectible reinsurance and a charge to earnings in that period, a downgrade in and of itself does not imply that we will be unable to collect all of the ceded reinsurance recoverable from the reinsurers in question. Refer to Note 5 to the Consolidated Financial Statements for additional information.

Fair value measurements
Accounting guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets (Level 1 inputs) and the lowest priority to unobservable data (Level 3 inputs). Level 2 includes inputs, other than quoted prices within Level 1, that are observable for assets or liabilities either directly or indirectly. Refer to Note 4 and Note 13 to the Consolidated Financial Statements for information on our fair value measurements.



46


Other-than-temporary impairments (OTTI)investment portfolio credit losses
Each quarter, we reviewevaluate current expected credit losses (CECL) for fixed maturity securities in an unrealized loss position (impaired securities), includingclassified as held to maturity and expected credit losses (ECL) for fixed maturities andmaturity securities lending collateral to identify impaired securities to be specifically evaluatedclassified as available for a potential OTTI.sale. Because our investment portfolio is the largest component of consolidated assets, OTTICECL and ECL could be material to our financial condition and results of operations. Refer to NoteNotes 1 e) and 3 c) to the Consolidated Financial Statements for a description of the OTTI process.more information.

Deferred income taxes
At December 31, 2019,2020, our net deferred tax liability was $804$892 million. Our deferred tax assets and liabilities primarily result from temporary differences between the amounts recorded in our consolidated financial statementsConsolidated Financial Statements and the tax basis of our assets and liabilities. We determine deferred tax assets and liabilities separately for each tax-paying component (an individual entity or group of entities that is consolidated for tax purposes) in each tax jurisdiction. The realization of deferred tax assets depends upon the existence of sufficient taxable income within the carryback or carryforward periods under the tax law in the applicable tax jurisdiction. There may be changes in tax laws in a number of countries where we transact business that impact our deferred tax assets and liabilities.
 

45

At each balance sheet date, management assesses the need to establish a valuation allowance that reduces deferred tax assets when it is more likely than not that all, or some portion, of the deferred tax assets will not be realized. The determination of the need for a valuation allowance is based on all available information including projections of future taxable income, principally derived from business plans and where appropriate available tax planning strategies. Projections of future taxable income incorporate assumptions of future business and operations that are apt to differ from actual experience. If our assumptions and estimates that resulted in our forecast of future taxable income prove to be incorrect, an additional valuation allowance could become necessary, which could have a material adverse effect on our financial condition, results of operations, and liquidity. At December 31, 2019,2020, the valuation allowance of $114$83 million reflects management's assessment that it is more likely than not that a portion of the deferred tax assets will not be realized due to the inability of certain foreign subsidiaries to generate sufficient taxable income.


Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts
Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States. We ceased writing this business in 2007. Guarantees which are payable on death are referred to as guaranteed minimum death benefits (GMDB). Guarantees on living benefits (GLB) consist mainly of guaranteed minimum income benefits (GMIB). For further description of this product and related accounting treatment, refer to Note 1 j) to the Consolidated Financial Statements.

Guaranteed living benefits (GLB) derivatives
Our GLB reinsurance is classified as a derivative for accounting purposes and therefore carried at fair value. We believe that the most meaningful presentation of these GLB derivatives is as follows:
Estimates of the average modeled value of future cash outflows is recorded as incurred losses (i.e., benefit reserves). Cash inflows or revenue are reported as net premiums earned and changes in the benefit reserves are reflected as Policy benefits expense in the Consolidated statements of operations, which is included in underwriting income.
The incremental difference between the fair value of GLB reinsurance contracts and benefit reserves is reflected in Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets and related changesChanges in fair value are reflected in Net realized gains (losses) in the Consolidated statements of operations.

Determination of GLB fair value
The fair value of GLB reinsurance is estimated using an internal valuation model, which includes current market information and estimates of policyholder behavior from the perspective of a theoretical market participant that would assume these liabilities. All of our treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of more timely market information. Due to the inherent uncertainties of the assumptions used in the valuation models to determine the fair value of these derivative products, actual experience may differ materially from the estimates reflected in our Consolidated Financial Statements.



47


We intend to hold these derivative contracts to maturity (i.e., the expiration of the underlying liabilities through lapse, annuitization, death, or expiration of the reinsurance contract). To partially offset the risk of changes in the fair value of GLB reinsurance contracts, we invest in derivative hedge instruments. At maturity,

For further information on the cumulative realized gainsestimates and losses (excluding cumulative hedge gains or losses) fromassumptions used in determining the fair value changes of GLB reinsurance, contracts willrefer to Note 4 to the Consolidated Financial Statements. For a sensitivity discussion of the effect of changes in interest rates, equity indices, and other assumptions on the fair value of GLBs, and the estimated resulting impact on our net income, refer to zero because, over time, the insurance liability will be increased or decreased to equal our obligation.Item 7A.

Determination of GLB and GMDB benefit reserves
Management established benefit reserves based on a long-term benefit ratio (or loss ratio) calculated using assumptions reflecting management’s best estimate of the future short-term and long-term performance of the GMDBvariable annuity line of business. Despite the long-term nature of the risk, the benefit ratio calculation is impacted by short-term market movements that may be judged by management to be transient. Management regularly examines both qualitative and quantitative analysis, including a review of the differential between the benefit ratio used at the most recent valuation date and the benefit ratio calculated on subsequent dates. Management regularly evaluates its estimates and uses judgment to determine the extent to which assumptions underlying the benefit ratio calculation should be adjusted. For the year ended December 31, 2019,2020, management determined that no change to the benefit ratio was warranted.

For further information on the estimates and assumptions used in determining the fair value

46

Table of GLB reinsurance, refer to Note 4 to the Consolidated Financial Statements. For a sensitivity discussion of the effect of changes in interest rates, equity indices, and other assumptions on the fair value of GLBs, and the estimated resulting impact on our net income, refer to Item 7A.Contents

Risk Management
We employ a strategy to manage the financial market and policyholder behavior risks embedded in the reinsurance of variable annuity (VA) guarantees. Risk management begins with underwriting a prospective client and guarantee design, with particular focus on protecting our position from policyholder options that, because of anti-selective behavior, could adversely impact our obligation.

A second layer of risk management is the structure of the reinsurance contracts. All VA guarantee reinsurance contracts include some form of annual or aggregate claim limit(s) primarily designed to reduce our exposure to severe equity market and/orand interest rate declines (which would cause an increase in expected claims).

A third layer of risk management is the hedging strategy which looks to mitigate both long-term economic loss over time as well as dampen income statement volatility. We owned financial market instruments as part of the hedging strategy with a fair value asset (liability)liability of $(13)$17 million and $23$13 million at December 31, 20192020 and 2018,2019, respectively. The instruments are substantially collateralized on a daily basis.

We also limit the aggregate amount of variable annuity reinsurance guarantee risk we are willing to assume. The last substantive transactions were quoted in late 2007. The aggregate number of policyholders is currently decreasing through policyholder withdrawals, annuitizations, and deaths at a rate of 5 percent to 15 percent per annum.

Note that GLB claims cannot occur for any reinsured policy until it has reached the end of its “waiting period”. As shown in the table below, 92of December 31, 2020, 93 percent of the policies we reinsure reached the end of their “waiting periods” in 2019 and prior..
Year of first payment eligibility
Percent of living benefit
account values

2019 and prior92%
20201%
20212%
2022%
20231%
2024 and after4%
Total100%


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The following table presents the historical cash flows under these policies for the periods indicated. The amounts represent accrued past premium received and claims paid, split by benefit type.
(in millions of U.S. dollars)2019  2018  2017 
GMDB
 GLB
 Total
 GMDB
 GLB
 Total
 GMDB
 GLB
 Total
Premium received$40
 $91
 $131
 $47
 $96
 $143
 $49
 $110
 $159
Less paid claims34
 91
 125
 32
 49
 81
 31
 54
 85
Net cash received$6
 $
 $6
 $15
 $47
 $62
 $18
 $56
 $74

Collateral
Chubb holdsmaintains collateral, including letters of credit (LOC), on behalf of most of its clients in the form of qualified assets in trust or letters of credit, typically in an amount sufficient for the client to obtain statutory reserve credit for the reinsurance. The timing of the calculation and amount of the collateral varies by client according to the particulars of the reinsurance treaty and the statutory reserve guidelines of the client's domicile. Refer to "Credit Facilities" for a discussion of the LOC related to our variable annuity program.

Goodwill impairment assessment
Goodwill, which represents the excess of acquisition cost over the estimated fair value of net assets acquired, was $15.4 billion and $15.3 billion at both December 31, 2020 and 2019, and 2018.respectively. Goodwill is assigned to applicable reporting units of acquired entities at the time of acquisition. Our reporting units are the same as our reportable segments. For goodwill balances by reporting units, refer to Note 6 to the Consolidated Financial Statements.

Goodwill is not amortized but is subject to a periodic evaluation for impairment at least annually, or earlier if there are any indications of possible impairment. Impairment is tested at the reporting unit level. The impairment evaluation first uses a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If a reporting unit fails this qualitative assessment, a single quantitative analysis is used to measure and record the amount of the impairment.

In assessing the fair value of a reporting unit, we make assumptions and estimates about the profitability attributable to our reporting units, including:
short-term and long-term growth rates; and
estimated cost of equity and changes in long-term risk-free interest rates.

If our assumptions and estimates made in assessing the fair value of acquired entities change, we could be required to write-down the carrying value of goodwill which could be material to our results of operations in the period the charge is taken. Based on our impairment testing for 2019,2020, we determined no impairment was required and none of our reporting units was at risk for impairment.



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Consolidated Operating Results – Years Ended December 31, 2020, 2019, 2018, and 20172018
 % Change
(in millions of U.S. dollars, except for percentages)2020201920182020 vs. 20192019 vs. 2018
Net premiums written$33,820 $32,275 $30,579 4.8 %5.5 %
Net premiums written - constant dollars (1)
5.5 %7.0 %
Net premiums earned33,117 31,290 30,064 5.8 %4.1 %
Net investment income3,375 3,426 3,305 (1.5)%3.6 %
Net realized gains (losses)(498)(530)(652)(6.1)%(18.8)%
Total revenues35,994 34,186 32,717 5.3 %4.5 %
Losses and loss expenses21,710 18,730 18,067 15.9 %3.7 %
Policy benefits784 740 590 5.9 %25.5 %
Policy acquisition costs6,547 6,153 5,912 6.4 %4.1 %
Administrative expenses2,979 3,030 2,886 (1.7)%5.0 %
Interest expense516 552 641 (6.4)%(13.9)%
Other (income) expense(994)(596)(434)66.8 %37.2 %
Amortization of purchased intangibles290 305 339 (4.9)%(10.2)%
Chubb integration expenses 23 59 NM(61.7)%
Total expenses31,832 28,937 28,060 10.0 %3.1 %
Income before income tax4,162 5,249 4,657 (20.7)%12.7 %
Income tax expense629 795 695 (20.8)%14.3 %
Net income$3,533 $4,454 $3,962 (20.7)%12.4 %
NM – not meaningful
(1)On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency exchange rates as the comparable current period.

     % Change 
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018
 2018 vs. 2017
Net premiums written$32,275
 $30,579
 $29,244
 5.5 % 4.6 %
Net premiums earned31,290
 30,064
 29,034
 4.1 % 3.5 %
Net investment income3,426
 3,305
 3,125
 3.6 % 5.8 %
Net realized gains (losses)(530) (652) 84
 (18.8)% NM
Total revenues34,186
 32,717
 32,243
 4.5 % 1.5 %
Losses and loss expenses18,730
 18,067
 18,454
 3.7 % (2.1)%
Policy benefits740
 590
 676
 25.5 % (12.7)%
Policy acquisition costs6,153
 5,912
 5,781
 4.1 % 2.3 %
Administrative expenses3,030
 2,886
 2,833
 5.0 % 1.9 %
Interest expense552
 641
 607
 (13.9)% 5.6 %
Other (income) expense(596) (434) (400) 37.2 % 8.5 %
Amortization of purchased intangibles305
 339
 260
 (10.2)% 30.4 %
Chubb integration expenses23
 59
 310
 (61.7)% (81.0)%
Total expenses28,937
 28,060
 28,521
 3.1 % (1.6)%
Income before income tax5,249
 4,657
 3,722
 12.7 % 25.1 %
Income tax expense (benefit)795
 695
 (139) 14.3 % NM
Net income$4,454
 $3,962
 $3,861
 12.4 % 2.6 %
Net premiums written - constant dollars (1)

      7.0 % 4.1 %
Net premiums earned - constant dollars (1)

      5.5 % 3.1 %
NM – not meaningful         
(1)
On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period. 

Net Premiums Written
2019 vs. 2018
Net premiums written reflect the premiums we retain after purchasing reinsurance protection. Consolidated net premiums written increased $1.7 billion in 2019, or $2.1 billion on a constant-dollar basis, reflecting growth across most segments.48

Net premiums written in our North America Commercial P&C Insurance segment increased$890 million (7.1 percent) in 2019, reflecting positive rate increases, new business written and strong retention across most retail lines, including property, financial lines, excess casualty, risk management, and commercial package, as well as in our wholesale and high excess Bermuda lines, and in our small commercial businesses.
Net premiums written in our North America Personal P&C Insurance segment increased$113 million (2.4 percent) in 2019, primarily due to strong retention and rate and exposure increases across most lines, partially offset by a $44 million benefit in 2018 related to the harmonization of our legacy premium registration systems, which unfavorably impacted growth by approximately 0.9 percentage points.
Net premiums written in our North America Agricultural Insurance segment increased$233 million (14.8 percent) in 2019, primarily due to growth in our MPCI business and growth in our Chubb Agribusiness. Growth in our MPCI premium was driven primarily by higher retention as a result of the premium sharing formulas under the U.S. government, as well as the non-renewal of a quota-share treaty effective with the current crop year and an increase in current year production. Under the MPCI premium sharing formula under the U.S. government, we cede additional premiums to the government during profitable years. In 2018, the program was more profitable which resulted in higher cessions compared to 2019.
Net premiums written in our Overseas General Insurance segment increased$360 million (4.0 percent) in 2019, or $722 million (8.4 percent) on a constant-dollar basis, reflecting growth across all regions and most lines of business. P&C lines growth was across all regions and was principally due to positive rate increases and new business in property, casualty, and financial lines. Personal lines growth was driven by new business principally in Latin America and Europe. Accident and health (A&H) lines growth was principally in Asia and Latin America driven by new business.


50


Net premiums written in our Global Reinsurance segment decreased$22 million (3.2 percent) in 2019, or $12 million (1.7 percent) on a constant-dollar basis, as an increase in new business written in property and marine lines was more than offset by an increase in ceded retrocessions, reductions in the international motor line, and higher reinstatement premiums collected in the prior year.
Net premiums written in our Life Insurance segment increased $122 million (5.3 percent) in 2019, or $143 million (6.4 percent) on a constant-dollar basis, primarily reflecting growth in our Asian and Latin American international life operations and North American Combined Insurance supplemental A&H program, partially offset by our life reinsurance business, which continues to decline as no new life reinsurance business is being written.

Net Premiums Written% Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018C$ 2020 vs. 2019
Commercial casualty$6,177 $5,654 $5,204 9.2 %8.7 %9.3 %
Workers' compensation2,015 2,098 2,094 (4.0)%0.1 %(4.0)%
Professional liability4,201 3,697 3,527 13.6 %4.8 %14.0 %
Surety531 639 635 (16.9)%0.6 %(14.5)%
Commercial multiple peril (1)
1,047 983 910 6.6 %8.0 %6.6 %
Property and other short-tail lines5,231 4,468 4,016 17.1 %11.3 %18.3 %
Total Commercial P&C19,202 17,539 16,386 9.5 %7.0 %10.0 %
Agriculture1,846 1,810 1,577 2.0 %14.8 %2.0 %
Personal automobile1,550 1,786 1,695 (13.2)%5.4 %(10.0)%
Personal homeowners3,627 3,513 3,391 3.2 %3.6 %3.5 %
Personal other1,656 1,514 1,508 9.4 %0.3 %9.8 %
Total Personal lines6,833 6,813 6,594 0.3 %3.3 %1.5 %
Total Property and Casualty lines27,881 26,162 24,557 6.6 %6.5 %7.2 %
Global A&H lines (2)
3,859 4,315 4,277 (10.6)%0.9 %(9.7)%
Reinsurance lines731 649 671 12.6 %(3.2)%12.1 %
Life1,349 1,149 1,074 17.4 %7.0 %18.4 %
Total consolidated$33,820 $32,275 $30,579 4.8 %5.5 %5.5 %
2018 vs. 2017(1)Commercial multiple peril represents retail package business (property and general liability).
Consolidated net premiums written increased $1.3 billion(2)For purposes of this schedule only, A&H results from our Combined North America and International businesses, normally included in 2018, or $1.2 billion (4.1 percent) on a constant-dollar basis, reflecting growth across most segments.

Net premiums written inthe Life Insurance and Overseas General Insurance segments, respectively, as well as the A&H results of our North America Commercial P&C Insurance segment, increased $466 million (3.9 percent)are included in 2018 reflecting positive rate increases, new business written, and strong renewals across a number of lines. Retail casualty and risk management, A&H, retail property, and continued growth in our small commercial business represented $339 million of the $466 million increase. In addition, the year-over-year increase in large structured transactions was $195 million. This growth was partially offset by merger-related underwriting actions of $123 million and premium reductions from planned portfolio management in our retail and wholesale brokerage financial lines ($62 million).
Net premiums written in our North America Personal P&C Insurance segment increased $141 million (3.1 percent) for 2018, primarily due to strong retention and new business growth in homeowners and complementary products such as automobiles and valuables. In addition, the non-renewal of a quota share treaty in the second quarter of 2017 covering the acquired Fireman's Fund homeowners and automobile businesses added $47 million of additional net premiums written in 2018. These increases were partially offset by the addition of California to the homeowners quota share reinsurance treaty, effective October 1, 2018 ($47 million), which included a non-recurring unearned premium reserves (UPR) transfer of $32 million.
Net premiums written in our North America Agricultural Insurance segment increased $61 million (4.0 percent) in 2018, primarily due to growth in our MPCI business and growth in our Chubb Agribusiness. The growth in MPCI premium was driven by policy count growth and the year-over-year impact of the premium sharing formulas under the U.S. government. In 2017, the program was more profitable which resulted in higher cessions compared to 2018. The increase was partially offset by lower volatility factors, which are a component of the policy pricing that measures the likelihood the commodity price will fluctuate over the crop year and reduces the premium we charge.
Net premiums written in our Overseas General Insurance segment increased $552 million (6.6 percent) in 2018, or $448 million (5.3 percent) on a constant-dollar basis, reflecting growth across most regions and lines of business. P&C lines growth was across all regions, principally in small commercial property and general casualty lines reflecting new business, and in middle market driven by new business and rate increases. Personal lines growth was principally in our automobile line in Mexico driven by new business, as well as in our specialty lines in Asia.Global A&H lines growth was principally in Asia driven by new business.above.
Net premiums written in our Global Reinsurance segment decreased $14 million (2.1 percent) in 2018, or $22 million (3.3 percent) on a constant-dollar basis, primarily due to higher reinstatement premiums collected in the prior year principally relating to the 2017 natural catastrophes ($15 million year-over-year decrease) and lower renewals, which is reflective of competitive market conditions primarily in catastrophe and catastrophe exposed lines of business, partially offset by new business written in the casualty line of business.
Net premiums written in our Life Insurance segment increased $129 million (6.1 percent) in 2018, or $123 million (5.7 percent) on a constant-dollar basis, primarily due to growth in our North American Combined Insurance supplemental A&H program business, and Asian and Latin American international life operations, partially offset by our life reinsurance business, which continues to decline as no new life reinsurance business is being written.


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Net Premiums Written By Line of Business
         % Change
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 
C$ (1)
2018

 
C$ (1) 2019 vs. 2018

Commercial casualty

$5,654
 $5,204
 $4,721
 $5,154
 9.7 %
Workers' compensation

2,098
 2,094
 2,067
 2,094
 0.1 %
Professional liability

3,697
 3,527
 3,547
 3,479
 6.3 %
Surety639
 635
 627
 622
 2.7 %
Commercial multiple peril (2)
983
 910
 879
 910
 8.0 %
Property and other short-tail lines4,468
 4,016
 3,819
 3,930
 13.7 %
Total Commercial P&C (3)
17,539
 16,386
 15,660
 16,189
 8.3 %
          
Agriculture1,810
 1,577
 1,516
 1,577
 14.8 %
          
Personal automobile1,786
 1,695
 1,563
 1,685
 6.0 %
Personal homeowners3,513
 3,391
 3,302
 3,383
 3.9 %
Personal other1,514
 1,508
 1,441
 1,454
 4.0 %
Total Personal lines6,813
 6,594
 6,306
 6,522
 4.4 %
Total Property and Casualty lines26,162
 24,557
 23,482
 24,288
 7.7 %
         

Global A&H lines (4)
4,315
 4,277
 4,056
 4,157
 3.8 %
Reinsurance lines649
 671
 685
 661
 (1.7)%
Life1,149
 1,074
 1,021
 1,059
 8.5 %
Total consolidated$32,275
 $30,579
 $29,244
 $30,165
 7.0 %
(1)
On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period.
(2)
Commercial multiple peril represents retail package business (property and general liability).
(3)
2018 included a reclassification of $56 million from Workers’ compensation and $1 million from Commercial multiple peril to Commercial casualty ($48 million) and Property and other short-tail lines ($9 million) to better align the reporting with current year. There is no impact to total Commercial P&C.
(4)
For purposes of this schedule only, A&H results from our Combined North America and International businesses, normally included in the Life Insurance and Overseas General Insurance segments, respectively, as well as the A&H results of our North America Commercial P&C segment, are included in Global A&H lines above.

The increase in net premiums written in 20192020 principally reflects positive growth across mostin commercial P&C lines globally, partially offset by negative growth in consumer P&C lines primarily from outside North America. The increase in net premiums written principally reflected new business, positive rate increases and higher renewal retention. This growth was tempered by the adverse impact of business.the economic contraction resulting from the COVID-19 pandemic, principally in consumer P&C lines.
The growth in commercial casualty was due to new business, and rate improvement in North America. In addition, commercial casualty grew internationally due to positive rate increases and new business across Europe, as well as growth in Australia.North America, Asia and Europe, partially offset by the adverse impact of the COVID-19 pandemic, including $58 million of exposure adjustments on in-force policies which depressed growth by 1.1 percentage points.
Growth in workers'Workers' compensation was adversely impacted by competitive market conditions in North America.and by the adverse impact of the economic contraction resulting from the COVID-19 pandemic. The decrease included $121 million of exposure adjustments on in-force policies which depressed growth by 5.8 percentage points.
The increase in professional liability was due to growthnew business and positive rate increases primarily in North America, Asia and Europe.
Surety decreased in North America and new business in Australia and Europe. Professional liability also had positive rate increases and retention in Australia.
Surety increasedLatin America due to new business in North America.market conditions and the adverse impact of the economic contraction resulting from the COVID-19 pandemic.
Commercial multiple peril increased due to new businessstrong renewal retention and higher renewal businesspositive rate increases in North America. The increase was partially offset by the adverse impact of the economic contraction resulting from the COVID-19 pandemic.
Property and other short-tail lines increased due to growthnew business and positive rate increases primarily in North America. In addition, propertyAmerica and other short-tailEurope.
Personal lines increased internationally, primarily due to newpositive rate increases and strong renewal retention in homeowners business in Australia and across Europe,North America, as well as positive rate increases internationally.
Our personal lines increased due to strong retention and rate and exposure increasesgrowth in Europe. In addition, North America. Personal lines also increased due to growthAmerica benefited from the favorable year-over-year impact of reinstatement premiums. The increase was partially offset by the impact of the COVID-19 pandemic, which caused declines in automobile business in Latin America and Europe.North America.
Global A&H lines increaseddecreased in all regions, principally from less travel volume due to growth in our North American Combined Insurance supplemental A&H program, along with new business in Asia and Latin America.the COVID-19 pandemic.
The increase in Life was primarily driven by growth in Latin America, principally driven by our Asianexpanded presence in Chile, and Latin Americanin the Asian international life operations.
For additional information on net premiums written, refer to the segment results discussions.


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52


Net Premiums EarnedNorth America Agricultural Insurance
2019 vs. 2018
Net premiums earnedApproximately 59 percent of the reserves for short-duration contracts, typically P&C contracts, generally reflectthis segment are from the portioncrop related lines, which all have short payout patterns, with the majority of net premiums written that were recorded as revenuesthe liabilities expected to be resolved in the ensuing twelve months. Claim reserves for the period as the exposure periods expire. Net premiums earned for long-duration contracts, typically traditional life contracts, generallyour Multiple Peril Crop Insurance (MPCI) product are recognized as earned when due from policyholders. Net premiums earned increased $1.2 billion, or $1.6 billionset on a constant-dollarcase-by-case basis and our aggregate exposure is subject to state level risk sharing formulae as well as third-party reinsurance. The majority of the development risk arises out of the accuracy of case reserve estimates and the time needed for final crop conditions to be assessed. We do not view our Agriculture reserves as substantially influenced by the general assumptions and risks underlying more typical P&C reserve estimates.

Overseas General Insurance
Certain long-tail lines, such as casualty and professional lines, are particularly susceptible to changes in 2019, reflectingloss trend and claim inflation. Heightened perceptions of tort and settlement awards around the growthworld can increase the demand for these products as well as contributing to the uncertainty in net premiums written described above, including the reserving estimates. Our reserving methods rely on loss development patterns estimated from historical data and while we attempt to adjust such factors for known changes in the current tort environment, it is possible that such factors may not entirely reflect all recent trends in tort environments. For example, when applying the reported loss development method, the lengthening of our selected loss development patterns by six months would increase reserve estimates on long-tail casualty and professional lines for accident years 2018 and prior by approximately $590 million. This represents an impact of premiums that were fully earned when written (e.g., large structured transactions and audit and retrospective premium adjustments).

2018 vs. 2017
Net premiums earned increased $1.0 billion, or $912 million on a constant-dollar basis in 2018, primarily due15.4 percent relative to the same factors driving the increase inrecorded net premiums written as described above. Net premiums earned were favorably impacted by the year-over-year increase in large structured transactions ($163 million), a number of which were earned immediately when written. These retroactive transactions did not impact premiums earned in 2019 as they were fully earned in 2018.

P&C Combined Ratio
In evaluating our segments excluding Life Insurance financial performance, we use the P&C combined ratio, the loss and loss expense ratio,reserves of approximately $3.8 billion.

Global Reinsurance
At December 31, 2020, net unpaid losses and loss expenses for the policy acquisition cost ratio,Global Reinsurance segment aggregated to $1.5 billion, consisting of $772 million of case reserves and $740 million of IBNR. In comparison, at December 31, 2019, net unpaid losses and loss expenses for the Global Reinsurance segment aggregated to $1.4 billion, consisting of $769 million of case reserves and $664 million of IBNR.

For our catastrophe business, we principally estimate unpaid losses and loss expenses on an event basis by considering various sources of information, including specific loss estimates reported by our cedants, ceding company and overall industry loss estimates reported by our brokers, and our internal data regarding reinsured exposures related to the geographical location of the

40

event. Our internal data analysis enables us to establish catastrophe reserves for known events with more certainty at an earlier date than would be the case if we solely relied on reports from third parties to determine carried reserves.

For our casualty reinsurance business, we generally rely on ceding companies to report claims and then use that data as a key input to estimate unpaid losses and loss expenses. Due to the reliance on claims information reported by ceding companies, as well as other factors, the estimation of unpaid losses and loss expenses for assumed reinsurance includes certain risks and uncertainties that are unique relative to our direct insurance business. These include, but are not necessarily limited to, the following:

The reported claims information could be inaccurate;
Typically, a lag exists between the reporting of a loss event to a ceding company and its reporting to us as a reinsurance claim. The use of a broker to transmit financial information from a ceding company to us increases the reporting lag. Because most of our reinsurance business is produced by brokers, ceding companies generally first submit claim and other financial information to brokers, who then report the proportionate share of such information to each reinsurer of a particular treaty. The reporting lag generally results in a longer period of time between the date a claim is incurred and the administrative expense ratio. date a claim is reported compared with direct insurance operations. Therefore, the risk of delayed recognition of loss reserve development is higher for assumed reinsurance than for direct insurance lines; and
The historical claims data for a particular reinsurance contract can be limited relative to our insurance business in that there may be less historical information available. Further, for certain coverages or products, such as excess of loss contracts, there may be relatively few expected claims in a particular year so the actual number of claims may be susceptible to significant variability. In such cases, the actuary often relies on industry data from several recognized sources.

We calculate these ratiosmitigate the above risks in several ways. In addition to routine analytical reviews of ceding company reports to ensure reported claims information appears reasonable, we perform regular underwriting and claims audits of certain ceding companies to ensure reported claims information is accurate, complete, and timely. As appropriate, audit findings are used to adjust claims in the reserving process. We also use our knowledge of the historical development of losses from individual ceding companies to adjust the level of adequacy we believe exists in the reported ceded losses.

On occasion, there will be differences between our carried loss reserves and unearned premium reserves and the amount of loss reserves and unearned premium reserves reported by dividing the respective expense amountsceding companies. This is due to the fact that we receive consistent and timely information from ceding companies only with respect to case reserves. For IBNR, we use historical experience and other statistical information, depending on the type of business, to estimate the ultimate loss. We estimate our unearned premium reserve by applying estimated earning patterns to net premiums earned. We do not calculatewritten for each treaty based upon that treaty's coverage basis (i.e., risks attaching or losses occurring). At December 31, 2020, the case reserves, net of retrocessions, reported to us by our ceding companies were $762 million, compared with the $772 million we recorded.  Our policy is to post additional case reserves in addition to the amounts reported by our cedants when our evaluation of the ultimate value of a reported claim is different than the evaluation of that claim by our cedant.

Typically, there is inherent uncertainty around the length of paid and reported development patterns, especially for certain casualty lines such as excess workers' compensation or general liability, which may take decades to fully develop. This uncertainty is accentuated by the need to supplement client development patterns with industry development patterns due to the sometimes low statistical credibility of the data. The underlying source and selection of the final development patterns can thus have a significant impact on the selected ultimate net losses and loss expenses. For example, a 20 percent shortening or lengthening of the development patterns used for U.S. long-tail lines would cause the loss reserve estimate derived by the reported Bornhuetter-Ferguson method for these ratios for the Life Insurance segment as we do not use these measureslines to monitor or manage that segment. The P&C combined ratio is determinedchange by adding theapproximately $245 million. This represents an impact of 37 percent relative to recorded net loss and loss expense ratio,reserves of approximately $655 million.

Corporate
Within Corporate, we also have exposure to certain liability reinsurance lines that have been in run-off since 1994. Unpaid losses and loss expenses relating to this run-off reinsurance business resides within the policy acquisition cost ratio, andBrandywine Division reported within Corporate. Most of the administrative expense ratio. A P&C combined ratio under 100 percent indicates underwriting income, and a combined ratio exceeding 100 percent indicates underwriting loss.
 2019
 2018
 2017
Loss and loss expense ratio62.1% 62.1% 65.8%
Policy acquisition cost ratio19.1% 19.2% 19.5%
Administrative expense ratio9.4% 9.3% 9.4%
P&C Combined ratio90.6% 90.6% 94.7%

Theremaining unpaid loss and loss expense ratio decreased 3.7 percentage pointsreserves for the run-off reinsurance business relate to A&E claims.

The A&E liabilities principally relate to claims arising from bodily-injury claims related to asbestos products and remediation costs associated with hazardous waste sites. The estimation of our A&E liabilities is particularly sensitive to future changes in 2018 principally duethe legal, social, and economic environment. We have not assumed any such future changes in setting the value of our A&E liabilities, which include provisions for both reported and IBNR claims.

41


There are many complex variables that we consider when estimating the reserves for our inventory of asbestos accounts and these variables may directly impact the predicted outcome. We believe the most significant variables relating to our A&E liabilities include the current legal environment; specific settlements that may be used as precedents to settle future claims; assumptions regarding trends with respect to claim severity and the frequency of higher severity claims; assumptions regarding the ability to allocate liability among defendants (including bankruptcy trusts) and other insurers; the ability of a claimant to bring a claim in a state in which they have no residency or exposure; the ability of a policyholder to claim the right to unaggregated coverage; whether high-level excess policies have the potential to be accessed given the policyholder's claim trends and liability situation; payments to unimpaired claimants; and, the potential liability of peripheral defendants. Based on the policies, the facts, the law, and a careful analysis of the impact that these factors will likely have on any given account, we estimate the potential liability for indemnity, policyholder defense costs, and coverage litigation expense.

The results in asbestos cases announced by other carriers or defendants may well have little or no relevance to us because coverage exposures are highly dependent upon the specific facts of individual coverage and resolution status of disputes among carriers, policyholders, and claimants.

For additional information refer to the following:
Lower catastrophe losses;
Integration-related claims handling expense savings;
Partially offset by increased frequency“Asbestos and severity of homeowners losses in our North America Personal P&C Insurance segment, primarily non-catastrophe water related eventsEnvironmental (A&E)” section and large fire losses which are trending above our expectations, and higher non-catastrophe large losses in our North America Commercial P&C Insurance segment.

Policy acquisition costs consist of commissions, premium taxes, and certain underwriting costs directly related to the successful acquisition of a new or renewal insurance contract. Our policy acquisition cost ratio decreased 0.3 percentage points in 2018 principally due to increased cessions under certain reinsurance agreements that resulted in higher ceded acquisition costs benefits than in the prior year.

Catastrophe Losses and Prior Period Development
Catastrophe losses exclude reinstatement premiums which are additional premiums paid on certain reinsurance agreements in order to reinstate coverage that had been exhausted by loss occurrences. The reinstatement premium amount is typically a pro rata portion of the original ceded premium paid based on how much of the reinsurance limit had been exhausted. Prior period development is net of related adjustments which typically relate to either profit commission reserves or policyholder dividend reserves based on actual claim experience that develops after the policy period ends. The expense adjustments correlate to the prior period loss development on these same policies. Refer to the Non-GAAP Reconciliation section for further information on reinstatement premiums on catastrophe losses and adjustments to prior period development.


53


(in millions of U.S dollars)2019
 2018
 2017
Catastrophe losses (excludes reinstatement premiums)$1,175
 $1,622
 $2,753
Favorable prior period development$792
 $896
 $829

We generally define catastrophe loss events consistent with the definition of the Property Claims Service (PCS) for events in the U.S. and Canada. PCS defines a catastrophe as an event that causes damage of $25 million or more in insured property losses and affects a significant number of insureds. For events outside of the U.S. and Canada, we generally use a similar definition. The tables below represent catastrophe loss estimates for events that occurred in the related calendar year only. Changes in catastrophe loss estimates in the current calendar year that relate to loss events that occurred in previous calendar years are considered prior period development and are excluded from the tables below.

The following table presents catastrophe losses and reinstatement premiums (RIPs) collected (expensed) in 2019:

 Catastrophe Loss Charge by Event 
 North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 Global
Reinsurance

 Total excluding RIPs
 RIPs collected (expensed)
 Total including RIPs
        
        
(in millions of U.S. dollars)       
Net losses               
U.S. flooding, hail, tornadoes, and wind events$220
 $202
 $7
 $
 $9
 $438
 $
 $438
Tornado in Dallas, Texas55
 145
 
 
 2
 202
 (11) 213
Winter-related storms74
 110
 1
 6
 2
 193
 
 193
Hurricane Dorian26
 30
 
 10
 8
 74
 1
 73
California wildfires11
 45
 
 
 
 56
 
 56
Typhoon Hagibis
 
 
 20
 17
 37
 1
 36
Civil unrest in Hong Kong and Chile
 
 
 33
 
 33
 (4) 37
International weather-related events1
 2
 
 30
 
 33
 
 33
Tropical Storm Imelda26
 4
 
 
 1
 31
 
 31
Australia storms
 
 
 27
 1
 28
 
 28
Typhoon Faxai
 
 
 15
 10
 25
 1
 24
Hurricane Barry3
 4
 
 
 
 7
 
 7
Australia wildfires
 
 
 5
 
 5
 
 5
Other5
 1
 
 6
 1
 13
 
 13
Total$421
 $543
 $8
 $152
 $51
 $1,175
    
RIPs collected (expensed)
 (11) 
 (4) 3
   (12)  
Total before income tax$421
 $554
 $8
 $156
 $48
     $1,187
Income tax benefit              221
Total after income tax              $966











54



The following table presents catastrophe losses and reinstatement premiums (RIPs) collected (expensed) in 2018:
 Catastrophe Loss Charge by Event 
 North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 
Global
Reinsurance

 Total excluding RIPs
 RIPs collected (expensed)
 Total including RIPs
 
 
(in millions of U.S. dollars)
Net losses               
Hurricane Michael$187
 $16
 $6
 $6
 $85
 $300
 $15
 $285
U.S. flooding, hail, tornadoes, and wind events (1)
162
 157
 7
 
 6
 332
 
 332
Northeast winter storms43
 117
 
 
 5
 165
 
 165
California wildfires51
 61
 1
 1
 58
 172
 (23) 195
Hurricane Florence109
 29
 7
 15
 14
 174
 1
 173
California mudslides4
 120
 
 1
 
 125
 
 125
Colorado rain and hail storm7
 65
 
 1
 
 73
 
 73
International weather-related events
 
 
 182
 31
 213
 2
 211
Other16
 46
 
 
 6
 68
 1
 67
Total$579
 $611
 $21
 $206
 $205
 $1,622
    
RIPs collected (expensed)
 (26) 
 
 22
   (4)  
Total before income tax$579
 $637
 $21
 $206
 $183
     $1,626
Income tax benefit              272
Total after income tax              $1,354
(1)
This grouping comprised of 34 separate events, principally impacting the southern and northeastern regions of the U.S.

The following table presents catastrophe losses and reinstatement premiums (RIPs) collected (expensed) in 2017:
 Catastrophe Loss Charge by Event 
 North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 
Global
Reinsurance

 Total excluding RIPs
 RIPs collected (expensed)
 Total including RIPs
 
 
(in millions of U.S. dollars)
Net losses               
N. California wildfires$61
 $151
 $
 $2
 $42
 $256
 $(21) $277
S. California wildfires23
 134
 
 
 
 157
 
 157
Hurricane Harvey391
 175
 1
 40
 48
 655
 5
 650
Hurricane Irma464
 206
 2
 79
 159
 910
 30
 880
Hurricane Maria50
 
 
 89
 55
 194
 (7) 201
Mexico Earthquakes
 
 
 25
 
 25
 
 25
Other231
 205
 15
 96
 9
 556
 
 556
Total$1,220
 $871
 $18
 $331
 $313
 $2,753
    
RIPs collected (expensed)(4) (22) 
 (4) 37
   7
  
Total before income tax$1,224
 $893
 $18
 $335
 $276
     $2,746
Income tax benefit              575
Total after income tax              $2,171



55


Prior period development (PPD) arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years.

Pre-tax net favorable prior period development for the year ended 2019 was $792 million, which included favorable development of $80 million in our crop insurance business and adverse development of $116 million related to legacy run-off exposures, principally asbestos and environmental liabilities. The remaining favorable development of $828 million comprised 92 percent long-tail lines, principally from accident years 2015 and prior, and 8 percent short-tail lines.

Net favorable prior period development for the year ended 2018 was $896 million, which included favorable reinsurance settlements of $205 million related to legacy run-off exposures, $197 million favorable development related to the 2017 catastrophe events, and favorable development of $110 million in our crop insurance business. There were $216 million of adverse development related to legacy run-off exposures, principally asbestos and environmental liabilities. The remaining favorable development of $600 million comprised 82 percent long-tail lines, principally for the 2014 and prior accident years, and 18 percent short-tail lines.

Refer to the Prior Period Development section in Note 7 to the Consolidated Financial Statements for additional information.Statements.

Current Accident Year (CAY) Loss Ratio excluding Catastrophe Losses (CATs)
The following table presents the impact of catastrophe losses and prior period development on our loss and loss expense ratio. Refer to the Non-GAAP Reconciliation section for additional information.Future policy benefits reserves
 2019
 2018
 2017
Loss and loss expense ratio62.1 % 62.1 % 65.8 %
Catastrophe losses(4.1)% (5.8)% (10.2)%
Favorable prior period development2.8 % 3.3 % 3.2 %
CAY loss ratio excluding catastrophe losses

60.8 % 59.6 % 58.8 %

2019 vs. 2018
The CAY loss ratio excluding catastrophe losses increased 1.2 percentage points in 2019 principally due to the following:
Downward revision in the 2019 crop year margin estimate reflecting preventive planting claims due to the impact of wet weather conditions and crop yield shortfalls resulting from poor growing conditions;
Change in mix of business and earned price changes modestly below loss trends in certain classes of our business;
Partially offset by the adverse impact of elevated homeowners losses in the prior year.

2018 vs. 2017
The CAY loss ratio excluding catastrophe losses increased 0.8 percentage points in 2018 principally due to the following:
Increased frequency and severity of homeowners lossesWe issue contracts in our North America Personal P&COverseas General Insurance segment, primarily non-catastrophe water related events and large fire losses;
Higher non-catastrophe large losses in our North America Commercial P&CLife Insurance segment;
Partially offset by integration-related claims handling expense savings realized.

CAY P&C Combined Ratio excluding CATs
 2019
 2018
 2017
CAY Loss and loss expense ratio ex CATs60.8% 59.6% 58.8%
CAY Policy acquisition cost ratio ex CATs19.1% 19.2% 19.4%
CAY Administrative expense ratio ex CATs9.3% 9.2% 9.4%
CAY P&C combined ratio ex CATs89.2% 88.0% 87.6%



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Policy benefits
Policy benefits represent losses on contractssegments that are classified as long-duration andlong-duration. These contracts generally include accident and supplemental health products, term and whole life products, endowment products, and annuities. In accordance with GAAP, we establish reserves for contracts determined to be long-duration based on approved actuarial methods that include assumptions related to expenses, mortality, morbidity, persistency and investment yields. For traditional long-duration contracts, these assumptions also include a provision for adverse deviation (PAD), and are “locked in” at the inception of the contract, meaning we use our original assumptions throughout the life of the policy and do not subsequently modify them unless we deem the reserves to be inadequate; while for non-traditional long-duration contracts, the assumptions do not include a PAD and are unlocked at each reporting date. The future policy benefits reserves balance is regularly evaluated for a premium deficiency. If experience is less favorable than assumptions, additional liabilities may be required, resulting in a charge to policyholder benefits and claims.

Valuation of value of business acquired (VOBA), and amortization of deferred policy acquisition costs and VOBA
As part of the acquisition of businesses that sell long-duration contracts, such as life products, we established an intangible asset related to VOBA, which represented the fair value of the future profits of the in-force contracts. The valuation of VOBA at the time of acquisition is derived from similar assumptions to those used to establish the associated future policy benefits reserves. The most significant input in this calculation is the discount rate used to arrive at the present value of the net cash flows. We amortize deferred policy acquisition costs associated with long-duration contracts and VOBA (collectively policy acquisition costs) over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to estimates of expected gross profits. The estimated life is established at the inception of the contracts or upon acquisition and is based on current persistency assumptions. Policy acquisition costs, which consist of commissions, premium taxes, and certain underwriting costs related directly to the successful acquisition of a new or renewal insurance contract, are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable costs are expensed in the period identified.

Risk transfer
In the ordinary course of business, we both purchase (or cede) and sell (or assume) reinsurance protection. We discontinued the purchase of all finite risk reinsurance contracts, as a matter of policy, in 2002. For both ceded and assumed reinsurance, risk transfer requirements must be met in order to use reinsurance accounting, principally resulting in the recognition of cash flows under the contract as premiums and losses. If risk transfer requirements are not met, a contract is to be accounted for as a deposit, typically resulting in the recognition of cash flows under the contract through a deposit asset or liability and not as revenue or expense. To meet risk transfer requirements, a reinsurance contract must include both insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. We also apply similar risk transfer requirements to determine whether certain commercial insurance contracts should be accounted for as insurance or a deposit. Contracts that include fixed premium (i.e., premium not subject to adjustment based on loss experience under the contract) for fixed coverage generally transfer risk and do not require judgment.


42

Reinsurance and insurance contracts that include both significant risk sharing provisions, such as adjustments to premiums or loss coverage based on loss experience, and relatively low policy limits, as evidenced by a high proportion of maximum premium assessments to loss limits, can require considerable judgment to determine whether or not risk transfer requirements are met. For such contracts, often referred to as finite or structured products, we require that risk transfer be specifically assessed for each contract by developing expected cash flow analyses at contract inception. To support risk transfer, the cash flow analyses must demonstrate that a significant loss is reasonably possible, such as a scenario in which the ratio of the net present value of losses divided by the net present value of premiums equals or exceeds 110 percent. For purposes of cash flow analyses, we generally use a risk-free rate of return consistent with the expected average duration of loss payments. In addition, to support insurance risk, we must prove the reinsurer's risk of loss varies with that of the reinsured and/or support various scenarios under which the assuming entity can recognize a significant loss.

To ensure risk transfer requirements are routinely assessed, qualitative and quantitative risk transfer analyses and memoranda supporting risk transfer are developed by underwriters for all structured products. We have established protocols for structured products that include criteria triggering an accounting review of the contract prior to quoting. If any criterion is triggered, a contract must be reviewed by a committee established by each of our segments with reporting oversight, including peer review, from our global Structured Transaction Review Committee.

With respect to ceded reinsurance, we entered into a few multi-year excess of loss retrospectively-rated contracts, principally in 2002. These contracts primarily provided severity protection for specific product divisions. Because traditional one-year reinsurance coverage had become relatively costly, these contracts were generally entered into in order to secure a more cost-effective reinsurance program. All of these contracts transferred risk and were accounted for as reinsurance. In addition, we maintain a few aggregate excess of loss reinsurance contracts that were principally entered into prior to 2003, such as the National Indemnity Company (NICO) contracts referred to in the section entitled, “Asbestos and Environmental (A&E)”. We have not purchased any other retroactive ceded reinsurance contracts since 1999.

With respect to assumed reinsurance and insurance contracts, products giving rise to judgments regarding risk transfer were primarily sold by our financial solutions business. Although we have significantly curtailed writing financial solutions business, several contracts remain in-force and principally include multi-year retrospectively-rated contracts and loss portfolio transfers. Because transfer of insurance risk is generally a primary client motivation for purchasing these products, relatively few insurance and reinsurance contracts have historically been written for which we concluded that risk transfer criteria had not been met. For certain insurance contracts that have been reported as deposits, the insured desired to self-insure a risk but was required, legally or otherwise, to purchase insurance so that claimants would be protected by a licensed insurance company in the event of non-payment from the insured.

Reinsurance recoverable
Reinsurance recoverable includes balances due to us from reinsurance companies for paid and unpaid losses and loss expenses and is presented net of a valuation allowance for uncollectible reinsurance. The valuation allowance for uncollectible reinsurance is determined based upon a review of the financial condition of the reinsurers and other factors. Ceded reinsurance contracts do not relieve our primary obligation to our policyholders. Consequently, an exposure exists with respect to reinsurance recoverable to the extent that any reinsurer is unable or unwilling to meet its obligations or disputes the liabilities assumed under the reinsurance contracts. We determine the reinsurance recoverable on unpaid losses and loss expenses using actuarial estimates as well as a determination of our ability to cede unpaid losses and loss expenses under existing reinsurance contracts.

The recognition of a reinsurance recoverable asset requires two key judgments. The first judgment involves our estimation based on the amount of gross reserves and the percentage of that amount which may be ceded to reinsurers. Ceded IBNR, which is a major component of the reinsurance recoverable on unpaid losses and loss expenses, is generally developed as part of our loss reserving process and, consequently, its estimation is subject to similar risks and uncertainties as the estimation of gross IBNR (refer to “Critical Accounting Estimates – Unpaid losses and loss expenses”). The second judgment involves our estimate of the amount of the reinsurance recoverable balance that we may ultimately be unable to recover from reinsurers due to insolvency, contractual dispute, or for other reasons. Estimated uncollectible amounts are reflected in a valuation allowance that reduces the reinsurance recoverable asset and, in turn, shareholders' equity. Changes in the valuation allowance for uncollectible reinsurance are reflected in net income.


43

Although the obligation of individual reinsurers to pay their reinsurance obligations is based on specific contract provisions, the collectability of such amounts requires estimation by management. The majority of the recoverable balance will not be due for collection until sometime in the future, and the duration of our recoverables may be longer than the duration of our direct exposures. Over this period of time, economic conditions and operational performance of a particular reinsurer may impact their ability to meet these obligations and while they may continue to acknowledge their contractual obligation to do so, they may not have the financial resources or willingness to fully meet their obligation to us.

To estimate the valuation allowance for uncollectible reinsurance, the reinsurance recoverable must first be determined for each reinsurer. This determination is based on a process rather than an estimate, although an element of judgment must be applied. As part of the process, ceded IBNR is allocated to reinsurance contracts because ceded IBNR is not generally calculated on a contract by contract basis. The allocations are generally based on premiums ceded under reinsurance contracts, adjusted for actual loss experience and historical relationships between gross and ceded losses. If actual premium and loss experience vary materially from historical experience, the allocation of reinsurance recoverable by reinsurer will be reviewed and may change. While such change is unlikely to result in a large percentage change in the valuation allowance for uncollectible reinsurance, it could, nevertheless, have a material effect on our net income in the period recorded.

Generally, we use a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and forward looking default factors used to estimate the probability that the reinsurer may be unable to meet its future obligations in full. In 2020, we adopted new guidance on the accounting for expected credit losses of reinsurance recoverable. For additional information, refer to Note 1 s) to the Consolidated Financial Statements under Item 8. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held by us with the same legal entity for which we believe there is a right of offset. We do not currently include multi-beneficiary trusts. However, we have several reinsurers that have established multi-beneficiary trusts for which certain of our companies are beneficiaries. The determination of the default factor is principally based on the financial strength rating of the reinsurer and a corresponding default factor applicable to the financial strength rating. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. Significant considerations and assumptions include, but are not necessarily limited to, the following:

For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the judgment exercised by management to determine the valuation allowance for uncollectible reinsurance of each reinsurer is typically limited because the financial rating is based on a published source and the default factor we apply is based on a historical default factor of a major rating agency applicable to the particular rating class. Default factors applied for financial ratings of AAA, AA, A, BBB, BB, B, and CCC, are 0.8 percent, 1.2 percent, 1.7 percent, 4.9 percent, 19.6 percent, 34.0 percent, and 62.2 percent, respectively. Because our model is predicated on the historical default factors of a major rating agency, we do not generally consider alternative factors. However, when a recoverable is expected to be paid in a brief period of time by a highly-rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;
For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent or affiliated company, we may determine a rating equivalent based on our analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which our ceded reserve is below a certain threshold, we generally apply a default factor of 34.0 percent;
For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting valuation allowance for uncollectible reinsurance based on specific facts and circumstances surrounding each company. Upon initial notification of an insolvency, we generally recognize expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the valuation allowance for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the valuation allowance for uncollectible reinsurance by establishing a default factor pursuant to information received; and
For captives and other recoverables, management determines the valuation allowance for uncollectible reinsurance based on the specific facts and circumstances.

44


The following table summarizes reinsurance recoverables and the valuation allowance for uncollectible reinsurance for each type of recoverable balance at December 31, 2020:
Gross Reinsurance Recoverables on Losses and Loss ExpensesRecoverables (net of Usable Collateral)
Valuation Allowance for Uncollectible Reinsurance (1)
(in millions of U.S. dollars)
Type
Reinsurers with credit ratings$12,479 $10,814 $179 
Reinsurers not rated290 154 57 
Reinsurers under supervision and insolvent reinsurers64 60 35 
Captives2,107 372 11 
Other - structured settlements and pools966 965 32 
Total$15,906 $12,365 $314 
(1)The valuation allowance for uncollectible reinsurance is based on a default analysis applied to gross reinsurance recoverables, net of approximately $3.5 billion of collateral at December 31, 2020.

AtDecember 31, 2020, the use of different assumptions within our approach could have a material effect on the valuation allowance for uncollectible reinsurance. To the extent the creditworthiness of our reinsurers was to deteriorate due to an adverse event affecting the reinsurance industry, such as a large number of major catastrophes, actual uncollectible amounts could be significantly greater than our valuation allowance for uncollectible reinsurance. Such an event could have a material adverse effect on our financial condition, results of operations, and our liquidity. Given the various considerations used to estimate our uncollectible valuation allowance, we cannot precisely quantify the effect a specific industry event may have on the valuation allowance for uncollectible reinsurance. However, based on the composition (particularly the average credit quality) of the reinsurance recoverable balance at December 31, 2020, we estimate that a ratings downgrade of one notch for all rated reinsurers (e.g., from A to A- or A- to BBB+) could increase our valuation allowance for uncollectible reinsurance by approximately $81 million or approximately 0.5 percent of the gross reinsurance recoverable balance, assuming no other changes relevant to the calculation. While a ratings downgrade would result in an increase in our valuation allowance for uncollectible reinsurance and a charge to earnings in that period, a downgrade in and of itself does not imply that we will be unable to collect all of the ceded reinsurance recoverable from the reinsurers in question. Refer to Note 5 to the Life Insurance segment operatingConsolidated Financial Statements for additional information.

Fair value measurements
Accounting guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets (Level 1 inputs) and the lowest priority to unobservable data (Level 3 inputs). Level 2 includes inputs, other than quoted prices within Level 1, that are observable for assets or liabilities either directly or indirectly. Refer to Note 4 and Note 13 to the Consolidated Financial Statements for information on our fair value measurements.

Assessment of investment portfolio credit losses
Each quarter, we evaluate current expected credit losses (CECL) for fixed maturity securities classified as held to maturity and expected credit losses (ECL) for fixed maturity securities classified as available for sale. Because our investment portfolio is the largest component of consolidated assets, CECL and ECL could be material to our financial condition and results sectionof operations. Refer to Notes 1 e) and 3 to the Consolidated Financial Statements for further discussion.more information.

Policy benefits were $740 million, $590 millionDeferred income taxes
At December 31, 2020, our net deferred tax liability was $892 million. Our deferred tax assets and $676 million in 2019, 2018 and 2017, respectively, which included separate account liabilities (gains) losses of $44 million, $(38) million and $97 million, respectively. The offsetting movements of these liabilities areprimarily result from temporary differences between the amounts recorded in Other (income) expenseour Consolidated Financial Statements and the tax basis of our assets and liabilities. We determine deferred tax assets and liabilities separately for each tax-paying component (an individual entity or group of entities that is consolidated for tax purposes) in each tax jurisdiction. The realization of deferred tax assets depends upon the existence of sufficient taxable income within the carryback or carryforward periods under the tax law in the applicable tax jurisdiction. There may be changes in tax laws in a number of countries where we transact business that impact our deferred tax assets and liabilities.

45

At each balance sheet date, management assesses the need to establish a valuation allowance that reduces deferred tax assets when it is more likely than not that all, or some portion, of the deferred tax assets will not be realized. The determination of the need for a valuation allowance is based on all available information including projections of future taxable income, principally derived from business plans and where appropriate available tax planning strategies. Projections of future taxable income incorporate assumptions of future business and operations that are apt to differ from actual experience. If our assumptions and estimates that resulted in our forecast of future taxable income prove to be incorrect, an additional valuation allowance could become necessary, which could have a material adverse effect on our financial condition, results of operations, and liquidity. At December 31, 2020, the valuation allowance of $83 million reflects management's assessment that it is more likely than not that a portion of the deferred tax assets will not be realized due to the inability of certain subsidiaries to generate sufficient taxable income.

Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts
Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States. We ceased writing this business in 2007. Guarantees which are payable on death are referred to as guaranteed minimum death benefits (GMDB). Guarantees on living benefits (GLB) consist mainly of guaranteed minimum income benefits (GMIB). For further description of this product and related accounting treatment, refer to Note 1 j) to the Consolidated Financial Statements.

Guaranteed living benefits (GLB) derivatives
Our GLB reinsurance is classified as a derivative for accounting purposes and therefore carried at fair value. Changes in fair value are reflected in Net realized gains (losses) in the Consolidated statements of operations. Excluding

Determination of GLB fair value
The fair value of GLB reinsurance is estimated using an internal valuation model, which includes current market information and estimates of policyholder behavior from the separateperspective of a theoretical market participant that would assume these liabilities. All of our treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account gainsvalue, market volatility, expected annuitization rates and losses, Policy benefits were $696 millionother policyholder behavior, and changes in 2019, comparedpolicyholder mortality. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of more timely market information. Due to the inherent uncertainties of the assumptions used in the valuation models to determine the fair value of these derivative products, actual experience may differ materially from the estimates reflected in our Consolidated Financial Statements.

We intend to hold these derivative contracts to maturity (i.e., the expiration of the underlying liabilities through lapse, annuitization, death, or expiration of the reinsurance contract). To partially offset the risk of changes in the fair value of GLB reinsurance contracts, we invest in derivative hedge instruments.

For further information on the estimates and assumptions used in determining the fair value of GLB reinsurance, refer to Note 4 to the Consolidated Financial Statements. For a sensitivity discussion of the effect of changes in interest rates, equity indices, and other assumptions on the fair value of GLBs, and the estimated resulting impact on our net income, refer to Item 7A.

Determination of GMDB benefit reserves
Management established benefit reserves based on a long-term benefit ratio (or loss ratio) calculated using assumptions reflecting management’s best estimate of the future performance of the GMDBvariable annuity line of business. Despite the long-term nature of the risk, the benefit ratio calculation is impacted by short-term market movements that may be judged by management to be transient. Management regularly examines both qualitative and quantitative analysis, including a review of the differential between the benefit ratio used at the most recent valuation date and the benefit ratio calculated on subsequent dates. Management regularly evaluates its estimates and uses judgment to determine the extent to which assumptions underlying the benefit ratio calculation should be adjusted. For the year ended December 31, 2020, management determined that no change to the benefit ratio was warranted.


46

Risk Management
We employ a strategy to manage the financial market and policyholder behavior risks embedded in the reinsurance of variable annuity (VA) guarantees. Risk management begins with $628underwriting a prospective client and guarantee design, with particular focus on protecting our position from policyholder options that, because of anti-selective behavior, could adversely impact our obligation.

A second layer of risk management is the structure of the reinsurance contracts. All VA guarantee reinsurance contracts include some form of annual or aggregate claim limit(s) primarily designed to reduce our exposure to severe equity market and interest rate declines (which would cause an increase in expected claims).

A third layer of risk management is the hedging strategy which looks to mitigate both long-term economic loss over time as well as dampen income statement volatility. We owned financial market instruments as part of the hedging strategy with a fair value liability of $17 million and $579$13 million at December 31, 2020 and 2019, respectively. The instruments are substantially collateralized on a daily basis.

We also limit the aggregate amount of variable annuity reinsurance guarantee risk we are willing to assume. The last substantive transactions were quoted in 2018late 2007. The aggregate number of policyholders is currently decreasing through policyholder withdrawals, annuitizations, and 2017, respectively.deaths at a rate of 5 percent to 15 percent per annum.

Note that GLB claims cannot occur for any reinsured policy until it has reached the end of its “waiting period”. As of December 31, 2020, 93 percent of the policies we reinsure reached the end of their “waiting periods”.

Collateral
Chubb maintains collateral, including letters of credit (LOC), on behalf of most of its clients in the form of qualified assets in trust or letters of credit, typically in an amount sufficient for the client to obtain statutory reserve credit for the reinsurance. The timing of the calculation and amount of the collateral varies by client according to the particulars of the reinsurance treaty and the statutory reserve guidelines of the client's domicile. Refer to the respective sections that follow"Credit Facilities" for a discussion of Net investment income, Interest expense, Other (income) expense, Net realized gainsthe LOC related to our variable annuity program.

Goodwill impairment assessment
Goodwill, which represents the excess of acquisition cost over the estimated fair value of net assets acquired, was $15.4 billion and losses, Amortization$15.3 billion at December 31, 2020 and 2019, respectively. Goodwill is assigned to applicable reporting units of purchased intangibles,acquired entities at the time of acquisition. Our reporting units are the same as our reportable segments. For goodwill balances by reporting units, refer to Note 6 to the Consolidated Financial Statements.

Goodwill is not amortized but is subject to a periodic evaluation for impairment at least annually, or earlier if there are any indications of possible impairment. Impairment is tested at the reporting unit level. The impairment evaluation first uses a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If a reporting unit fails this qualitative assessment, a single quantitative analysis is used to measure and Income tax expense.record the amount of the impairment.

In assessing the fair value of a reporting unit, we make assumptions and estimates about the profitability attributable to our reporting units, including:
short-term and long-term growth rates; and
estimated cost of equity and changes in long-term risk-free interest rates.

If our assumptions and estimates made in assessing the fair value of acquired entities change, we could be required to write-down the carrying value of goodwill which could be material to our results of operations in the period the charge is taken. Based on our impairment testing for 2020, we determined no impairment was required and none of our reporting units was at risk for impairment.


47

SegmentConsolidated Operating Results – Years Ended December 31, 2020, 2019, 2018, and 20172018
 % Change
(in millions of U.S. dollars, except for percentages)2020201920182020 vs. 20192019 vs. 2018
Net premiums written$33,820 $32,275 $30,579 4.8 %5.5 %
Net premiums written - constant dollars (1)
5.5 %7.0 %
Net premiums earned33,117 31,290 30,064 5.8 %4.1 %
Net investment income3,375 3,426 3,305 (1.5)%3.6 %
Net realized gains (losses)(498)(530)(652)(6.1)%(18.8)%
Total revenues35,994 34,186 32,717 5.3 %4.5 %
Losses and loss expenses21,710 18,730 18,067 15.9 %3.7 %
Policy benefits784 740 590 5.9 %25.5 %
Policy acquisition costs6,547 6,153 5,912 6.4 %4.1 %
Administrative expenses2,979 3,030 2,886 (1.7)%5.0 %
Interest expense516 552 641 (6.4)%(13.9)%
Other (income) expense(994)(596)(434)66.8 %37.2 %
Amortization of purchased intangibles290 305 339 (4.9)%(10.2)%
Chubb integration expenses 23 59 NM(61.7)%
Total expenses31,832 28,937 28,060 10.0 %3.1 %
Income before income tax4,162 5,249 4,657 (20.7)%12.7 %
Income tax expense629 795 695 (20.8)%14.3 %
Net income$3,533 $4,454 $3,962 (20.7)%12.4 %
NM – not meaningful
(1)On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency exchange rates as the comparable current period.


We operate through six48

Net Premiums Written% Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018C$ 2020 vs. 2019
Commercial casualty$6,177 $5,654 $5,204 9.2 %8.7 %9.3 %
Workers' compensation2,015 2,098 2,094 (4.0)%0.1 %(4.0)%
Professional liability4,201 3,697 3,527 13.6 %4.8 %14.0 %
Surety531 639 635 (16.9)%0.6 %(14.5)%
Commercial multiple peril (1)
1,047 983 910 6.6 %8.0 %6.6 %
Property and other short-tail lines5,231 4,468 4,016 17.1 %11.3 %18.3 %
Total Commercial P&C19,202 17,539 16,386 9.5 %7.0 %10.0 %
Agriculture1,846 1,810 1,577 2.0 %14.8 %2.0 %
Personal automobile1,550 1,786 1,695 (13.2)%5.4 %(10.0)%
Personal homeowners3,627 3,513 3,391 3.2 %3.6 %3.5 %
Personal other1,656 1,514 1,508 9.4 %0.3 %9.8 %
Total Personal lines6,833 6,813 6,594 0.3 %3.3 %1.5 %
Total Property and Casualty lines27,881 26,162 24,557 6.6 %6.5 %7.2 %
Global A&H lines (2)
3,859 4,315 4,277 (10.6)%0.9 %(9.7)%
Reinsurance lines731 649 671 12.6 %(3.2)%12.1 %
Life1,349 1,149 1,074 17.4 %7.0 %18.4 %
Total consolidated$33,820 $32,275 $30,579 4.8 %5.5 %5.5 %
(1)Commercial multiple peril represents retail package business segments:(property and general liability).
(2)For purposes of this schedule only, A&H results from our Combined North America and International businesses, normally included in the Life Insurance and Overseas General Insurance segments, respectively, as well as the A&H results of our North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance,segment, are included in Global Reinsurance, and Life Insurance. In addition, the results of our run-off Brandywine business, including all run-off asbestos and environmental (A&E) exposures, and the results of Westchester specialty operations for 1996 and prior years are presented within Corporate.

North America Commercial P&C Insurance

The North America Commercial P&C Insurance segment comprises operations that provide property and casualty (P&C) insurance and services to large, middle market, and small commercial businesses in the U.S., Canada, and Bermuda. This segment includes our North America Major Accounts and Specialty Insurance division (large corporate accounts and wholesale business), and the North America Commercial Insurance division (principally middle market and small commercial accounts).
       % Change 
(in millions of U.S. dollars, except for percentages)2019

2018

2017

2019 vs. 2018  2018 vs. 2017 
Net premiums written$13,375

$12,485
 $12,019

7.1% 3.9%
Net premiums earned12,922

12,402
 12,191

4.2% 1.7%
Losses and loss expenses8,206

8,000
 8,287

2.6% (3.5)%
Policy acquisition costs1,831

1,829
 1,873

0.2% (2.3)%
Administrative expenses1,028

966
 981

6.4% (1.5)%
Underwriting income1,857
 1,607
 1,050

15.5% 53.0%
Net investment income2,082

2,033
 1,961

2.4% 3.7%
Other (income) expense(3)
(25) 1

(86.5)% NM 
Segment income$3,942

$3,665

$3,010

7.5% 21.8%
Loss and loss expense ratio63.5% 64.5% 68.0%
(1.0)pt
 (3.5)pts
Policy acquisition cost ratio14.2% 14.7% 15.4%
(0.5)pts
 (0.7)pts
Administrative expense ratio7.9% 7.8% 8.0%
0.1
pts
 (0.2)pts
Combined ratio85.6% 87.0% 91.4%
(1.4)pts
 (4.4)pts
NM – not meaningful

Premiums
The table below shows the impact of large structured transactions as well as other transactions that are fully earned when written (e.g., audit and retrospective premium adjustments).
(in millions of U.S. dollars)2019
 2018
 2017
Net premiums fully earned when written$391
 $342
 $160


57



2019 vs. 2018
Net premiums written increased $890 million, or 7.1 percent in 2019, reflecting positive rate increases, new business written and strong retention across most retail lines, including property, financial lines, excess casualty, risk management, and commercial package, as well as in our wholesale and high excess Bermuda lines, and in our small commercial businesses.

Net premiums earned increased $520 million, or 4.2 percent in 2019, due to the growthThe increase in net premiums written described above.

2018 vs. 2017
Netin 2020 principally reflects positive growth in commercial P&C lines globally, partially offset by negative growth in consumer P&C lines primarily from outside North America. The increase in net premiums written increased $466 million, or 3.9 percent in 2018 reflectingprincipally reflected new business, positive rate increases and higher renewal retention. This growth was tempered by the adverse impact of the economic contraction resulting from the COVID-19 pandemic, principally in consumer P&C lines.
The growth in commercial casualty was due to new business, written,positive rate increases and strong renewals across a number of lines. Retail casualty and risk management, A&H, retail property, and continued growth in our small commercial business represented $339North America, Asia and Europe, partially offset by the adverse impact of the COVID-19 pandemic, including $58 million of exposure adjustments on in-force policies which depressed growth by 1.1 percentage points.
Workers' compensation was adversely impacted by market conditions and by the $466adverse impact of the economic contraction resulting from the COVID-19 pandemic. The decrease included $121 million increase. In addition, the year-over-yearof exposure adjustments on in-force policies which depressed growth by 5.8 percentage points.
The increase in large structured transactionsprofessional liability was $195 million. This growthdue to new business and positive rate increases primarily in North America, Asia and Europe.
Surety decreased in North America and Latin America due to market conditions and the adverse impact of the economic contraction resulting from the COVID-19 pandemic.
Commercial multiple peril increased due to strong renewal retention and positive rate increases in North America. The increase was partially offset by merger-related underwriting actionsthe adverse impact of $123 millionthe economic contraction resulting from the COVID-19 pandemic.
Property and premium reductions from planned portfolio managementother short-tail lines increased due to new business and positive rate increases primarily in our retailNorth America and wholesale brokerage financialEurope.
Personal lines ($62 million).

Net premiums earned increased $211 million, or 1.7 percent in 2018 principally reflecting the net premiums written increases described above and the year-over-year increase in large structured transactions ($163 million), a number of which were earned immediately when written as they were retroactive covers.

Combined Ratio
2019 vs. 2018
The loss and loss expense ratio decreased 1.0 percentage point in 2019, primarily due to lower catastrophe losses, partially offset by a changepositive rate increases and strong renewal retention in mix ofhomeowners business and earned price changes modestly below loss trends in certain classes of our business.

The policy acquisition cost ratio decreased 0.5 percentage pointsNorth America, as well as growth in 2019, due to a change in mix of business towards lower acquisition cost ratio lines and increased cessions under certain reinsurance agreements that resulted in higher ceded acquisition cost benefits than inEurope. In addition, North America benefited from the prior year.

2018 vs. 2017
The loss and loss expense ratio decreased 3.5 percentage points in 2018, primarily due to lower catastrophe losses and integration-related claims handling expense savings realized, partially offset by lower favorable prior period development, higher non-catastrophe losses (0.4 percentage points), and a less favorable adjustment to our claims handling reserve in the current year relative to 2017.

The policy acquisition cost ratio decreased 0.7 percentage points in 2018, due to increased cessions under certain reinsurance agreements that resulted in higher ceded acquisition costs benefits than in the prior year.

The administrative expense ratio decreased 0.2 percentage points in 2018, primarily due to integration-related expense savings realized, higher net profit from our third-party claims administration business, ESIS, and the net favorableyear-over-year impact of one-time expense accrual releases.

Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)2019
 2018
 2017
Catastrophe losses (excludes reinstatement premiums)$421
 $579
 $1,220
Favorable prior period development$649
 $610
 $746

Catastrophe losses were primarily from the following events (refer to the table on page 54):
2019: Winter-related storms and other severe weather-related events in the U.S., including tornadoes in Texas, Hurricane Dorian, and Tropical Storm Imelda
2018: Hurricanes Florence and Michael, and severe weather-related events in the U.S., including California wildfires
2017: Hurricanes Harvey, Irma and Maria and severe weather-related events in the U.S., including California wildfires



58


CAY Loss Ratio excluding Catastrophe Losses
 2019
 2018
 2017
Loss and loss expense ratio63.5 % 64.5 % 68.0 %
Catastrophe losses(3.3)% (4.7)% (10.0)%
Favorable prior period development5.1 % 5.1 % 6.3 %
CAY loss ratio excluding catastrophe losses

65.3 % 64.9 % 64.3 %

2019 vs. 2018
reinstatement premiums. The CAY loss ratio excluding catastrophe losses increased 0.4 percentage points for 2019 due to a change in mix of business and earned price changes modestly below loss trends in certain classes of our business.

2018 vs. 2017
The CAY loss ratio excluding catastrophe losses increased 0.6 percentage points for 2018, due to higher year-over-year large loss activity and a less favorable adjustment to our claims handling reserve in the current year relative to 2017, partially offset by integration-related claims handling expense savings realized.

North America Personal P&C Insurance
The North America Personal P&C Insurance segment comprises operations that provide high net worth personal lines products, including homeowners and complementary products such as valuable articles, excess liability, automobile, and recreational marine insurance and services in the U.S. and Canada.
       % Change 
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018  2018 vs. 2017 
Net premiums written$4,787
 $4,674
 $4,533
 2.4% 3.1%
Net premiums earned4,694
 4,593
 4,399
 2.2% 4.4%
Losses and loss expenses3,043
 3,229
 3,265
 (5.8)% (1.1)%
Policy acquisition costs948
 939
 899
 1.0% 4.4%
Administrative expenses286
 269
 264
 6.0% 1.9%
Underwriting income (loss)417
 156
 (29) 167.2% NM 
Net investment income258
 236
 226
 9.2% 4.4%
Other (income) expense3
 1
 4
 117.1% (75.0)%
Amortization of purchased intangibles12
 13
 16
 (11.1)% (18.8)%
Segment income$660
 $378
 $177
 74.7% 113.6%
Loss and loss expense ratio64.8% 70.3% 74.2% (5.5)pts
 (3.9)pts
Policy acquisition cost ratio20.2% 20.4% 20.4% (0.2)pts
 
 
Administrative expense ratio6.1% 5.9% 6.1% 0.2
pts
 (0.2)pts
Combined ratio91.1% 96.6% 100.7% (5.5)pts
 (4.1)pts
NM – not meaningful

Premiums
2019 vs. 2018
Net premiums written increased $113 million, or 2.4 percent for 2019, primarily due to strong retention and rate and exposure increases across most lines, partially offset by a $44 million benefit in 2018 related to the harmonization of our legacy premium registration systems, which unfavorably impacted growth by approximately 0.9 percentage points.

Net premiums earned increased $101 million, or 2.2 percent for 2019, reflecting the growth in net premiums written described above.



59


2018 vs. 2017
Net premiums written increased $141 million, or 3.1 percent for 2018, primarily due to strong retention and new business growth in homeowners and complementary products such as automobiles and valuables. In addition, the non-renewal of a quota share treaty in the second quarter of 2017 covering the acquired Fireman's Fund homeowners and automobile businesses added $47 million of additional net premiums written in 2018. These increases wereincrease was partially offset by the additionimpact of California to the homeowners quota share reinsurance treaty, effective October 1, 2018 ($47 million),COVID-19 pandemic, which included a non-recurring unearned premium reserves (UPR) transfer of $32 million.caused declines in automobile business in Latin America and North America.

Net premiums earned increased $194 million, or 4.4 percent for 2018, primarilyGlobal A&H lines decreased in all regions, principally from less travel volume due to the factors described above.COVID-19 pandemic.

Combined Ratio
2019 vs. 2018
The lossincrease in Life was primarily driven by growth in Latin America, principally driven by our expanded presence in Chile, and loss expense ratio decreased 5.5 percentage points in 2019, primarily due to lower catastrophe losses and favorable prior period development in the current year compared to unfavorable prior period development in the prior year. Additionally, the prior year underlying loss ratio was elevated principally due to increased frequency and severity, primarily non-catastrophe water and fire losses in our homeowners business.Asian international life operations.

The policy acquisition cost ratio decreased 0.2 percentage points in 2019, primarily due to higher ceded commission benefits.

2018 vs. 2017
The loss and loss expense ratio decreased 3.9 percentage points in 2018, primarily due to lower catastrophe losses (6.5 percentage points), lower unfavorable prior period development (0.6 percentage points), and integration-related claims handling expense savings realized. These decreases were offset by increased frequency and severity of homeowners losses primarily non-catastrophe water related events and large fire losses which are trending above our expectations (3.3 percentage points).

The policy acquisition cost ratio remained flat in 2018. The administrative expense ratio decreased 0.2 percentage points in 2018, primarily due to integration-related expense savings realized that exceeded normal merit and inflation.

Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)2019
 2018
 2017
Catastrophe losses (excludes reinstatement premiums)$543
 $611
 $871
Favorable (unfavorable) prior period development$95
 $(41) $(69)

Catastrophe losses were primarily from the following events (referFor additional information on net premiums written, refer to the table on page 54):
2019: Winter-related storms and other severe weather-related events in the U.S., including tornadoes in Texas, California wildfires and Hurricane Dorian
2018: Colorado rain and hailstorms, Hurricanes Florence and Michael, California mudslides, and other severe weather-related events in the U.S., including California wildfires
2017: Hurricanes Harvey and Irma and severe weather-related events in the U.S., including California wildfires

CAY Loss Ratio excluding Catastrophe Lossessegment results discussions.

 2019
 2018
 2017
Loss and loss expense ratio64.8 % 70.3 % 74.2 %
Catastrophe losses(11.6)% (13.6)% (20.1)%
Favorable (unfavorable) prior period development1.9 % (0.9)% (1.5)%
CAY loss ratio excluding catastrophe losses

55.1 % 55.8 % 52.6 %
49

2019 vs. 2018
The CAY loss ratio excluding catastrophe losses decreased 0.7 percentage points in 2019. The prior year underlying loss ratio was elevated, principally due to increased frequency and severity, primarily non-catastrophe water and fire losses in our homeowners business.



60


2018 vs. 2017
The CAY loss ratio excluding catastrophe losses increased 3.2 percentage points in 2018, due to increased frequency and severity of homeowners losses primarily non-catastrophe water related events and large fire losses.

North America Agricultural Insurance

The North America Agricultural InsuranceApproximately 59 percent of the reserves for this segment comprises our North American based businesses that provide a varietyare from the crop related lines, which all have short payout patterns, with the majority of coveragesthe liabilities expected to be resolved in the U.S. and Canada including crop insurance, primarilyensuing twelve months. Claim reserves for our Multiple Peril Crop Insurance (MPCI) product are set on a case-by-case basis and crop-hail through Rain and Hail Insurance Service, Inc. (Rain and Hail)our aggregate exposure is subject to state level risk sharing formulae as well as farm and ranch and specialty P&C commercial insurance products and services through our Chubb Agribusiness unit.
       % Change 
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018  2018 vs. 2017 
Net premiums written$1,810
 $1,577
 $1,516
 14.8% 4.0%
Net premiums earned1,795
 1,569
 1,508
 14.4% 4.1%
Adjusted losses and loss expenses1,616
 1,114
 1,043
 45.1% 6.8%
Policy acquisition costs84
 79
 81
 6.8% (2.5)%
Administrative expenses6
 (9) (8) NM  12.5%
Underwriting income89
 385
 392
 (77.0)% (1.8)%
Net investment income30
 28
 25
 5.0% 12.0%
Other (income) expense1
 2
 2
 (33.6)%  
Amortization of purchased intangibles28
 28
 29
 (2.0)% (3.4)%
Segment income$90
 $383
 $386
 (76.6)% (0.8)%
Loss and loss expense ratio90.1% 71.0 % 69.2 % 19.1
pts
 1.8
pts
Policy acquisition cost ratio4.7% 5.0 % 5.4 % (0.3)pts
 (0.4)pts
Administrative expense ratio0.3% (0.5)% (0.6)% 0.8
pts
 0.1
pts
Combined ratio95.1% 75.5 % 74.0 % 19.6
pts
 1.5
pts
NM – not meaningful

Premiums
2019 vs. 2018
Net premiums written increased $233 million, or 14.8 percent in 2019, primarily due to growth in our MPCI business and growth in our Chubb Agribusiness. Growth in our MPCI premium was driven primarily by higher retention as a resultthird-party reinsurance. The majority of the premium sharing formulas underdevelopment risk arises out of the U.S. government, as well as the non-renewalaccuracy of a quota-share treaty effective with the current crop year and an increase in current year production. Under the MPCI premium sharing formula under the U.S. government, we cede additional premiums to the government during profitable years. In 2018, the program was more profitable which resulted in higher cessions compared to 2019.

Net premiums earned increased $226 million, or 14.4 percent in 2019, reflecting the growth in net premiums written described above.

2018 vs. 2017
Net premiums written increased $61 million, or 4.0 percent in 2018, primarily due to growth in our MPCI business and growth in our Chubb Agribusiness. The growth in MPCI premium was driven by policy count growthcase reserve estimates and the year-over-year impact oftime needed for final crop conditions to be assessed. We do not view our Agriculture reserves as substantially influenced by the premium sharing formulas under the U.S. government. In 2017, the program wasgeneral assumptions and risks underlying more profitable which resulted in higher cessions compared to 2018. The increase was partially offset by lower volatility factors, which are a component of the policy pricing that measures the likelihood the commodity price will fluctuate over the crop year and reduces the premium we charge.

Net premiums earned increased $61 million, or 4.1 percent in 2018, due to the factors described above.



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Combined Ratio
2019 vs. 2018
The loss and loss expense ratio increased 19.1 percentage points in 2019, principally due to lower favorable prior period development and the downward revision in the 2019 crop year margin estimate reflecting preventive planting claims due to the impact of wet weather conditions and crop yield shortfalls resulting from poor growing conditions. The increase in the loss ratio was partially offset by lower catastrophe losses.

The policy acquisition cost ratio decreased 0.3 percentage points in 2019, primarily due to lower agent profit sharing commission.

The administrative expense ratio increased 0.8 percentage points in 2019, primarily due to a reduction in the current year Administrative and Operating (A&O) reimbursements on the MPCI business we received under the government program and normal operating expense and inflationary increases.

2018 vs. 2017
The loss and loss expense ratio increased 1.8 percentage points in 2018 due to higher catastrophe losses and lower favorable prior period development.

The policy acquisition cost ratio decreased 0.4 percentage points in 2018 due to lower MPCI reinsurance cessions in the current year.

Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)2019
 2018
 2017
Catastrophe losses (excludes reinstatement premiums)$8
 $21
 $18
Favorable prior period development$80
 $110
 $119

Catastrophe losses in 2019, 2018, and 2017 were primarily from severe weather-related events in the U.S. in our farm, ranch and specialtytypical P&C businesses. Refer to the table on page 54.reserve estimates.

Net favorable prior period development was $80 million, $110 million, and $119 million in 2019, 2018, and 2017, respectively. For 2019, the prior period development amount included $103 million of favorable incurred losses and $13 million of lower acquisition costs due to lower than expected MPCI losses for the 2018 crop year, partially offset by a $36 million decrease in net premiums earned related to the MPCI profit and loss calculation formula. For 2018, the prior period development amount included $140 million of favorable incurred losses and $10 million of lower acquisition costs due to lower than expected MPCI losses for the 2017 crop year, partially offset by a $40 million decrease in net premiums earned related to the MPCI profit and loss calculation formula.

CAY Loss Ratio excluding Catastrophe Losses
 2019
 2018
 2017
Loss and loss expense ratio90.1 % 71.0 % 69.2 %
Catastrophe losses(0.5)% (1.3)% (1.2)%
Favorable prior period development3.9 % 7.0 % 8.2 %
CAY loss ratio excluding catastrophe losses

93.5 % 76.7 % 76.2 %

2019 vs. 2018
The CAY loss ratio excluding catastrophe losses increased 16.8 percentage points in 2019, principally due to the downward revision in the 2019 crop year margin estimate reflecting preventive planting claims due to the impact of wet weather conditions and crop yield shortfalls resulting from poor growing conditions.

2018 vs. 2017
The CAY loss ratio excluding catastrophe losses increased 0.5 percentage points in 2018, primarily due to a less favorable crop margin in the current year versus 2017, partially offset by lower underlying losses in our Chubb Agribusiness unit.



62


Overseas General Insurance

Overseas General Insurance segment comprises Chubb International and Chubb Global Markets (CGM). Chubb International comprises our international commercial P&C traditional and specialtyCertain long-tail lines, serving large corporations, middle market and small customers; A&H and traditional and specialty personal lines business serving local territories outside the U.S., Bermuda, and Canada. CGM, our London-based international commercial P&C excess and surplus lines business, includes Lloyd's of London (Lloyd's) Syndicate 2488. Chubb provides funds at Lloyd's to support underwriting by Syndicate 2488 which is managed by Chubb Underwriting Agencies Limited.
       % Change 
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018  2018 vs. 2017 
Net premiums written$9,262
 $8,902
 $8,350
 4.0% 6.6%
Net premiums earned8,882
 8,612
 8,131
 3.1% 5.9%
Losses and loss expenses4,606
 4,429
 4,281
 4.0% 3.5%
Policy acquisition costs2,501
 2,346
 2,221
 6.6% 5.6%
Administrative expenses1,033
 1,014
 982
 1.9% 3.3%
Underwriting income742
 823
 647
 (9.8)% 27.2%
Net investment income588
 619
 610
 (5.1)% 1.5%
Other (income) expense12
 
 (4) NM  NM 
Amortization of purchased intangibles45
 41
 45
 8.3% (8.9)%
Segment income$1,273
 $1,401
 $1,216
 (9.2)% 15.2%
Net premiums written - constant dollars (1)
      8.4% 5.3%
Net premiums earned - constant dollars (1)
      7.6% 4.7%
Underwriting income - constant dollars (1)
      (3.7)% 24.1%
Loss and loss expense ratio51.9% 51.4% 52.6% 0.5
pts (1.2)pts
Policy acquisition cost ratio28.1% 27.2% 27.3% 0.9
pts (0.1)pts
Administrative expense ratio11.6% 11.8% 12.1% (0.2)pts (0.3)pts
Combined ratio91.6% 90.4% 92.0% 1.2
pts (1.6)pts
NM – not meaningful
Net Premiums Written by Region
         % Change 
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 
C$ (1)
2018

 2019 vs. 2018
 
C$ (1) 2019 vs. 2018

 2018 vs. 2017
Region             
Europe$3,631
 $3,508
 $3,281
 $3,357
 3.5% 8.2% 6.9 %
Latin America2,277
 2,181
 2,108
 2,059
 4.4% 10.6% 3.5 %
Asia3,021
 2,884
 2,596
 2,806
 4.7% 7.6% 11.1 %
Other (2)
333
 329
 365
 318
 1.1% 4.8% (9.9)%
Net premiums written$9,262
 $8,902
 $8,350
 $8,540
 4.0% 8.4% 6.6 %
 
2019
% of Total

 
2018
% of Total

 
2017
% of Total

        
Region             
Europe38% 39% 40%        
Latin America25% 25% 25%        
Asia33% 32% 31%        
Other (2)
4% 4% 4%        
Net premiums written100% 100% 100%        
(1)
On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency ratessuch as the comparable current period. 
(2)
Comprises Combined International, Eurasia and Africa region, and other international.


63



Premiums
2019 vs. 2018
Net premiums written increased $360 million in 2019, or $722 million on a constant-dollar basis, reflecting growth across all regions and most lines of business. P&C lines growth was across all regions and was principally due to positive rate increases and new business in property, casualty and financial lines. Personalprofessional lines, growth was driven by new business principallyare particularly susceptible to changes in Latin Americaloss trend and Europe. Accidentclaim inflation. Heightened perceptions of tort and health (A&H) lines growth was principally in Asia and Latin America driven by new business.

Net premiums earned increased $270 million in 2019, or $629 million on a constant-dollar basis, reflectingsettlement awards around the world can increase in net premiums written.

2018 vs. 2017
Net premiums written increased $552 million in 2018, or $448 million on a constant-dollar basis, reflecting growth across most regions and lines of business. P&C lines growth was across all regions, principally in small commercial property and general casualty lines reflecting new business, and in middle market driven by new business and rate increases. Personal lines growth was principally in our automobile line in Mexico driven by new business,the demand for these products as well as in our specialty lines in Asia. A&H lines growth was principally in Asia driven by new business.

Net premiums earned increased $481 million in 2018, or $384 million on a constant-dollar basis, duecontributing to the uncertainty in the reserving estimates. Our reserving methods rely on loss development patterns estimated from historical data and while we attempt to adjust such factors described above.

Combined Ratio
2019 vs.for known changes in the current tort environment, it is possible that such factors may not entirely reflect all recent trends in tort environments. For example, when applying the reported loss development method, the lengthening of our selected loss development patterns by six months would increase reserve estimates on long-tail casualty and professional lines for accident years 2018
The and prior by approximately $590 million. This represents an impact of 15.4 percent relative to recorded net loss and loss expense ratio increased 0.5 percentage points in 2019 due to lower favorable prior period development, partially offset by lower catastrophe losses, earned price changes modestly above loss trends, favorable loss experience in certain personal lines, and a change in mixreserves of business towards products and regions that have a lower loss and loss expense ratio and a higher policy acquisition cost ratio.

The policy acquisition cost ratio increased 0.9 percentage points in 2019 due to a change in mix of business towards products and regions that have a higher policy acquisition cost ratio and lower loss and loss expense ratio as noted above, higher underwriting costs resulting from the successful acquisition of business, and higher commissions paid on certain personal lines due to favorable loss experience.

2018 vs. 2017
The loss and loss expense ratio decreased 1.2 percentage points in 2018, reflecting lower catastrophe losses (1.6 percentage points) and a change in the mix of business towards consumer and property and casualty lines in countries that have a lower loss ratio and a higher acquisition cost ratio (0.3 percentage points), partially offset by lower favorable prior period development in 2018 (0.6 percentage points).

The policy acquisition cost ratio was relatively flat in 2018.

The administrative expense ratio decreased 0.3 percentage points in 2018, primarily driven by integration-expense savings realized (0.3 percentage points).

Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)2019
 2018
 2017
Catastrophe losses (excludes reinstatement premiums)$152
 $206
 $331
Favorable prior period development$92
 $212
 $252





64


Catastrophe losses were primarily from the following events (refer to the table on page 54):
2019: Typhoons Faxai and Hagibis; Hurricane Dorian; storms in Australia; civil unrest in Hong Kong and Chile; and other international weather-related events
2018: Typhoons Jebi, Mangkhut and Trami; Hurricane Florence and storms in Australia
2017: Hurricanes Harvey, Irma and Maria; Earthquakes in Mexico, Cyclone Debbie in Australia, and flooding in Latin America

approximately $3.8 billion.
CAY Loss Ratio excluding Catastrophe Losses
 2019
 2018
 2017
Loss and loss expense ratio51.9 % 51.4 % 52.6 %
Catastrophe losses(1.8)% (2.4)% (4.0)%
Favorable prior period development1.1 % 2.5 % 3.1 %
CAY loss ratio excluding catastrophe losses

51.2 % 51.5 % 51.7 %

2019 vs. 2018
The CAY loss ratio excluding catastrophe losses decreased 0.3 percentage points in 2019 primarily due to earned price changes modestly above loss trends, favorable loss experience in certain personal lines, and a change in mix of business towards products and regions that have a lower loss and loss expense ratio and a higher policy acquisition cost ratio.

2018 vs. 2017
The CAY loss ratio excluding catastrophe losses decreased 0.2 percentage points in 2018 primarily due to a change in the mix of business towards consumer and property and casualty lines in countries that have a lower loss ratio and a higher acquisition cost ratio.

Global Reinsurance
At December 31, 2020, net unpaid losses and loss expenses for the Global Reinsurance segment aggregated to $1.5 billion, consisting of $772 million of case reserves and $740 million of IBNR. In comparison, at December 31, 2019, net unpaid losses and loss expenses for the Global Reinsurance segment aggregated to $1.4 billion, consisting of $769 million of case reserves and $664 million of IBNR.

For our catastrophe business, we principally estimate unpaid losses and loss expenses on an event basis by considering various sources of information, including specific loss estimates reported by our cedants, ceding company and overall industry loss estimates reported by our brokers, and our internal data regarding reinsured exposures related to the geographical location of the

40

event. Our internal data analysis enables us to establish catastrophe reserves for known events with more certainty at an earlier date than would be the case if we solely relied on reports from third parties to determine carried reserves.

For our casualty reinsurance business, we generally rely on ceding companies to report claims and then use that data as a key input to estimate unpaid losses and loss expenses. Due to the reliance on claims information reported by ceding companies, as well as other factors, the estimation of unpaid losses and loss expenses for assumed reinsurance includes certain risks and uncertainties that are unique relative to our direct insurance business. These include, but are not necessarily limited to, the following:

The reported claims information could be inaccurate;
Typically, a lag exists between the reporting of a loss event to a ceding company and its reporting to us as a reinsurance claim. The use of a broker to transmit financial information from a ceding company to us increases the reporting lag. Because most of our reinsurance business is produced by brokers, ceding companies generally first submit claim and other financial information to brokers, who then report the proportionate share of such information to each reinsurer of a particular treaty. The reporting lag generally results in a longer period of time between the date a claim is incurred and the date a claim is reported compared with direct insurance operations. Therefore, the risk of delayed recognition of loss reserve development is higher for assumed reinsurance than for direct insurance lines; and
The historical claims data for a particular reinsurance contract can be limited relative to our insurance business in that there may be less historical information available. Further, for certain coverages or products, such as excess of loss contracts, there may be relatively few expected claims in a particular year so the actual number of claims may be susceptible to significant variability. In such cases, the actuary often relies on industry data from several recognized sources.

We mitigate the above risks in several ways. In addition to routine analytical reviews of ceding company reports to ensure reported claims information appears reasonable, we perform regular underwriting and claims audits of certain ceding companies to ensure reported claims information is accurate, complete, and timely. As appropriate, audit findings are used to adjust claims in the reserving process. We also use our knowledge of the historical development of losses from individual ceding companies to adjust the level of adequacy we believe exists in the reported ceded losses.

On occasion, there will be differences between our carried loss reserves and unearned premium reserves and the amount of loss reserves and unearned premium reserves reported by the ceding companies. This is due to the fact that we receive consistent and timely information from ceding companies only with respect to case reserves. For IBNR, we use historical experience and other statistical information, depending on the type of business, to estimate the ultimate loss. We estimate our unearned premium reserve by applying estimated earning patterns to net premiums written for each treaty based upon that treaty's coverage basis (i.e., risks attaching or losses occurring). At December 31, 2020, the case reserves, net of retrocessions, reported to us by our ceding companies were $762 million, compared with the $772 million we recorded.  Our policy is to post additional case reserves in addition to the amounts reported by our cedants when our evaluation of the ultimate value of a reported claim is different than the evaluation of that claim by our cedant.

Typically, there is inherent uncertainty around the length of paid and reported development patterns, especially for certain casualty lines such as excess workers' compensation or general liability, which may take decades to fully develop. This uncertainty is accentuated by the need to supplement client development patterns with industry development patterns due to the sometimes low statistical credibility of the data. The underlying source and selection of the final development patterns can thus have a significant impact on the selected ultimate net losses and loss expenses. For example, a 20 percent shortening or lengthening of the development patterns used for U.S. long-tail lines would cause the loss reserve estimate derived by the reported Bornhuetter-Ferguson method for these lines to change by approximately $245 million. This represents an impact of 37 percent relative to recorded net loss and loss expense reserves of approximately $655 million.

Corporate
Within Corporate, we also have exposure to certain liability reinsurance lines that have been in run-off since 1994. Unpaid losses and loss expenses relating to this run-off reinsurance business resides within the Brandywine Division reported within Corporate. Most of the remaining unpaid loss and loss expense reserves for the run-off reinsurance business relate to A&E claims.

The A&E liabilities principally relate to claims arising from bodily-injury claims related to asbestos products and remediation costs associated with hazardous waste sites. The estimation of our A&E liabilities is particularly sensitive to future changes in the legal, social, and economic environment. We have not assumed any such future changes in setting the value of our A&E liabilities, which include provisions for both reported and IBNR claims.

41


There are many complex variables that we consider when estimating the reserves for our inventory of asbestos accounts and these variables may directly impact the predicted outcome. We believe the most significant variables relating to our A&E liabilities include the current legal environment; specific settlements that may be used as precedents to settle future claims; assumptions regarding trends with respect to claim severity and the frequency of higher severity claims; assumptions regarding the ability to allocate liability among defendants (including bankruptcy trusts) and other insurers; the ability of a claimant to bring a claim in a state in which they have no residency or exposure; the ability of a policyholder to claim the right to unaggregated coverage; whether high-level excess policies have the potential to be accessed given the policyholder's claim trends and liability situation; payments to unimpaired claimants; and, the potential liability of peripheral defendants. Based on the policies, the facts, the law, and a careful analysis of the impact that these factors will likely have on any given account, we estimate the potential liability for indemnity, policyholder defense costs, and coverage litigation expense.

The results in asbestos cases announced by other carriers or defendants may well have little or no relevance to us because coverage exposures are highly dependent upon the specific facts of individual coverage and resolution status of disputes among carriers, policyholders, and claimants.

For additional information refer to the “Asbestos and Environmental (A&E)” section and to Note 7 to the Consolidated Financial Statements.

Future policy benefits reserves
We issue contracts in our Overseas General Insurance and Life Insurance segments that are classified as long-duration. These contracts generally include accident and supplemental health products, term and whole life products, endowment products, and annuities. In accordance with GAAP, we establish reserves for contracts determined to be long-duration based on approved actuarial methods that include assumptions related to expenses, mortality, morbidity, persistency and investment yields. For traditional long-duration contracts, these assumptions also include a provision for adverse deviation (PAD), and are “locked in” at the inception of the contract, meaning we use our original assumptions throughout the life of the policy and do not subsequently modify them unless we deem the reserves to be inadequate; while for non-traditional long-duration contracts, the assumptions do not include a PAD and are unlocked at each reporting date. The future policy benefits reserves balance is regularly evaluated for a premium deficiency. If experience is less favorable than assumptions, additional liabilities may be required, resulting in a charge to policyholder benefits and claims.

Valuation of value of business acquired (VOBA), and amortization of deferred policy acquisition costs and VOBA
As part of the acquisition of businesses that sell long-duration contracts, such as life products, we established an intangible asset related to VOBA, which represented the fair value of the future profits of the in-force contracts. The valuation of VOBA at the time of acquisition is derived from similar assumptions to those used to establish the associated future policy benefits reserves. The most significant input in this calculation is the discount rate used to arrive at the present value of the net cash flows. We amortize deferred policy acquisition costs associated with long-duration contracts and VOBA (collectively policy acquisition costs) over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to estimates of expected gross profits. The estimated life is established at the inception of the contracts or upon acquisition and is based on current persistency assumptions. Policy acquisition costs, which consist of commissions, premium taxes, and certain underwriting costs related directly to the successful acquisition of a new or renewal insurance contract, are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable costs are expensed in the period identified.

Risk transfer
In the ordinary course of business, we both purchase (or cede) and sell (or assume) reinsurance protection. We discontinued the purchase of all finite risk reinsurance contracts, as a matter of policy, in 2002. For both ceded and assumed reinsurance, risk transfer requirements must be met in order to use reinsurance accounting, principally resulting in the recognition of cash flows under the contract as premiums and losses. If risk transfer requirements are not met, a contract is to be accounted for as a deposit, typically resulting in the recognition of cash flows under the contract through a deposit asset or liability and not as revenue or expense. To meet risk transfer requirements, a reinsurance contract must include both insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. We also apply similar risk transfer requirements to determine whether certain commercial insurance contracts should be accounted for as insurance or a deposit. Contracts that include fixed premium (i.e., premium not subject to adjustment based on loss experience under the contract) for fixed coverage generally transfer risk and do not require judgment.


42

Reinsurance and insurance contracts that include both significant risk sharing provisions, such as adjustments to premiums or loss coverage based on loss experience, and relatively low policy limits, as evidenced by a high proportion of maximum premium assessments to loss limits, can require considerable judgment to determine whether or not risk transfer requirements are met. For such contracts, often referred to as finite or structured products, we require that risk transfer be specifically assessed for each contract by developing expected cash flow analyses at contract inception. To support risk transfer, the cash flow analyses must demonstrate that a significant loss is reasonably possible, such as a scenario in which the ratio of the net present value of losses divided by the net present value of premiums equals or exceeds 110 percent. For purposes of cash flow analyses, we generally use a risk-free rate of return consistent with the expected average duration of loss payments. In addition, to support insurance risk, we must prove the reinsurer's risk of loss varies with that of the reinsured and/or support various scenarios under which the assuming entity can recognize a significant loss.

To ensure risk transfer requirements are routinely assessed, qualitative and quantitative risk transfer analyses and memoranda supporting risk transfer are developed by underwriters for all structured products. We have established protocols for structured products that include criteria triggering an accounting review of the contract prior to quoting. If any criterion is triggered, a contract must be reviewed by a committee established by each of our segments with reporting oversight, including peer review, from our global Structured Transaction Review Committee.

With respect to ceded reinsurance, we entered into a few multi-year excess of loss retrospectively-rated contracts, principally in 2002. These contracts primarily provided severity protection for specific product divisions. Because traditional one-year reinsurance coverage had become relatively costly, these contracts were generally entered into in order to secure a more cost-effective reinsurance program. All of these contracts transferred risk and were accounted for as reinsurance. In addition, we maintain a few aggregate excess of loss reinsurance contracts that were principally entered into prior to 2003, such as the National Indemnity Company (NICO) contracts referred to in the section entitled, “Asbestos and Environmental (A&E)”. We have not purchased any other retroactive ceded reinsurance contracts since 1999.

With respect to assumed reinsurance and insurance contracts, products giving rise to judgments regarding risk transfer were primarily sold by our financial solutions business. Although we have significantly curtailed writing financial solutions business, several contracts remain in-force and principally include multi-year retrospectively-rated contracts and loss portfolio transfers. Because transfer of insurance risk is generally a primary client motivation for purchasing these products, relatively few insurance and reinsurance contracts have historically been written for which we concluded that risk transfer criteria had not been met. For certain insurance contracts that have been reported as deposits, the insured desired to self-insure a risk but was required, legally or otherwise, to purchase insurance so that claimants would be protected by a licensed insurance company in the event of non-payment from the insured.

Reinsurance recoverable
Reinsurance recoverable includes balances due to us from reinsurance companies for paid and unpaid losses and loss expenses and is presented net of a valuation allowance for uncollectible reinsurance. The valuation allowance for uncollectible reinsurance is determined based upon a review of the financial condition of the reinsurers and other factors. Ceded reinsurance contracts do not relieve our primary obligation to our policyholders. Consequently, an exposure exists with respect to reinsurance recoverable to the extent that any reinsurer is unable or unwilling to meet its obligations or disputes the liabilities assumed under the reinsurance contracts. We determine the reinsurance recoverable on unpaid losses and loss expenses using actuarial estimates as well as a determination of our ability to cede unpaid losses and loss expenses under existing reinsurance contracts.

The recognition of a reinsurance recoverable asset requires two key judgments. The first judgment involves our estimation based on the amount of gross reserves and the percentage of that amount which may be ceded to reinsurers. Ceded IBNR, which is a major component of the reinsurance recoverable on unpaid losses and loss expenses, is generally developed as part of our loss reserving process and, consequently, its estimation is subject to similar risks and uncertainties as the estimation of gross IBNR (refer to “Critical Accounting Estimates – Unpaid losses and loss expenses”). The second judgment involves our estimate of the amount of the reinsurance recoverable balance that we may ultimately be unable to recover from reinsurers due to insolvency, contractual dispute, or for other reasons. Estimated uncollectible amounts are reflected in a valuation allowance that reduces the reinsurance recoverable asset and, in turn, shareholders' equity. Changes in the valuation allowance for uncollectible reinsurance are reflected in net income.


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Although the obligation of individual reinsurers to pay their reinsurance obligations is based on specific contract provisions, the collectability of such amounts requires estimation by management. The majority of the recoverable balance will not be due for collection until sometime in the future, and the duration of our recoverables may be longer than the duration of our direct exposures. Over this period of time, economic conditions and operational performance of a particular reinsurer may impact their ability to meet these obligations and while they may continue to acknowledge their contractual obligation to do so, they may not have the financial resources or willingness to fully meet their obligation to us.

To estimate the valuation allowance for uncollectible reinsurance, the reinsurance recoverable must first be determined for each reinsurer. This determination is based on a process rather than an estimate, although an element of judgment must be applied. As part of the process, ceded IBNR is allocated to reinsurance contracts because ceded IBNR is not generally calculated on a contract by contract basis. The allocations are generally based on premiums ceded under reinsurance contracts, adjusted for actual loss experience and historical relationships between gross and ceded losses. If actual premium and loss experience vary materially from historical experience, the allocation of reinsurance recoverable by reinsurer will be reviewed and may change. While such change is unlikely to result in a large percentage change in the valuation allowance for uncollectible reinsurance, it could, nevertheless, have a material effect on our net income in the period recorded.

Generally, we use a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and forward looking default factors used to estimate the probability that the reinsurer may be unable to meet its future obligations in full. In 2020, we adopted new guidance on the accounting for expected credit losses of reinsurance recoverable. For additional information, refer to Note 1 s) to the Consolidated Financial Statements under Item 8. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held by us with the same legal entity for which we believe there is a right of offset. We do not currently include multi-beneficiary trusts. However, we have several reinsurers that have established multi-beneficiary trusts for which certain of our companies are beneficiaries. The determination of the default factor is principally based on the financial strength rating of the reinsurer and a corresponding default factor applicable to the financial strength rating. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. Significant considerations and assumptions include, but are not necessarily limited to, the following:

For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the judgment exercised by management to determine the valuation allowance for uncollectible reinsurance of each reinsurer is typically limited because the financial rating is based on a published source and the default factor we apply is based on a historical default factor of a major rating agency applicable to the particular rating class. Default factors applied for financial ratings of AAA, AA, A, BBB, BB, B, and CCC, are 0.8 percent, 1.2 percent, 1.7 percent, 4.9 percent, 19.6 percent, 34.0 percent, and 62.2 percent, respectively. Because our model is predicated on the historical default factors of a major rating agency, we do not generally consider alternative factors. However, when a recoverable is expected to be paid in a brief period of time by a highly-rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;
For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent or affiliated company, we may determine a rating equivalent based on our analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which our ceded reserve is below a certain threshold, we generally apply a default factor of 34.0 percent;
For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting valuation allowance for uncollectible reinsurance based on specific facts and circumstances surrounding each company. Upon initial notification of an insolvency, we generally recognize expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the valuation allowance for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the valuation allowance for uncollectible reinsurance by establishing a default factor pursuant to information received; and
For captives and other recoverables, management determines the valuation allowance for uncollectible reinsurance based on the specific facts and circumstances.

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The following table summarizes reinsurance recoverables and the valuation allowance for uncollectible reinsurance for each type of recoverable balance at December 31, 2020:
Gross Reinsurance Recoverables on Losses and Loss ExpensesRecoverables (net of Usable Collateral)
Valuation Allowance for Uncollectible Reinsurance (1)
(in millions of U.S. dollars)
Type
Reinsurers with credit ratings$12,479 $10,814 $179 
Reinsurers not rated290 154 57 
Reinsurers under supervision and insolvent reinsurers64 60 35 
Captives2,107 372 11 
Other - structured settlements and pools966 965 32 
Total$15,906 $12,365 $314 
(1)The valuation allowance for uncollectible reinsurance is based on a default analysis applied to gross reinsurance recoverables, net of approximately $3.5 billion of collateral at December 31, 2020.

AtDecember 31, 2020, the use of different assumptions within our approach could have a material effect on the valuation allowance for uncollectible reinsurance. To the extent the creditworthiness of our reinsurers was to deteriorate due to an adverse event affecting the reinsurance industry, such as a large number of major catastrophes, actual uncollectible amounts could be significantly greater than our valuation allowance for uncollectible reinsurance. Such an event could have a material adverse effect on our financial condition, results of operations, and our liquidity. Given the various considerations used to estimate our uncollectible valuation allowance, we cannot precisely quantify the effect a specific industry event may have on the valuation allowance for uncollectible reinsurance. However, based on the composition (particularly the average credit quality) of the reinsurance recoverable balance at December 31, 2020, we estimate that a ratings downgrade of one notch for all rated reinsurers (e.g., from A to A- or A- to BBB+) could increase our valuation allowance for uncollectible reinsurance by approximately $81 million or approximately 0.5 percent of the gross reinsurance recoverable balance, assuming no other changes relevant to the calculation. While a ratings downgrade would result in an increase in our valuation allowance for uncollectible reinsurance and a charge to earnings in that period, a downgrade in and of itself does not imply that we will be unable to collect all of the ceded reinsurance recoverable from the reinsurers in question. Refer to Note 5 to the Consolidated Financial Statements for additional information.

Fair value measurements
Accounting guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets (Level 1 inputs) and the lowest priority to unobservable data (Level 3 inputs). Level 2 includes inputs, other than quoted prices within Level 1, that are observable for assets or liabilities either directly or indirectly. Refer to Note 4 and Note 13 to the Consolidated Financial Statements for information on our fair value measurements.

Assessment of investment portfolio credit losses
Each quarter, we evaluate current expected credit losses (CECL) for fixed maturity securities classified as held to maturity and expected credit losses (ECL) for fixed maturity securities classified as available for sale. Because our investment portfolio is the largest component of consolidated assets, CECL and ECL could be material to our financial condition and results of operations. Refer to Notes 1 e) and 3 to the Consolidated Financial Statements for more information.

Deferred income taxes
At December 31, 2020, our net deferred tax liability was $892 million. Our deferred tax assets and liabilities primarily result from temporary differences between the amounts recorded in our Consolidated Financial Statements and the tax basis of our assets and liabilities. We determine deferred tax assets and liabilities separately for each tax-paying component (an individual entity or group of entities that is consolidated for tax purposes) in each tax jurisdiction. The realization of deferred tax assets depends upon the existence of sufficient taxable income within the carryback or carryforward periods under the tax law in the applicable tax jurisdiction. There may be changes in tax laws in a number of countries where we transact business that impact our deferred tax assets and liabilities.

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At each balance sheet date, management assesses the need to establish a valuation allowance that reduces deferred tax assets when it is more likely than not that all, or some portion, of the deferred tax assets will not be realized. The determination of the need for a valuation allowance is based on all available information including projections of future taxable income, principally derived from business plans and where appropriate available tax planning strategies. Projections of future taxable income incorporate assumptions of future business and operations that are apt to differ from actual experience. If our assumptions and estimates that resulted in our forecast of future taxable income prove to be incorrect, an additional valuation allowance could become necessary, which could have a material adverse effect on our financial condition, results of operations, and liquidity. At December 31, 2020, the valuation allowance of $83 million reflects management's assessment that it is more likely than not that a portion of the deferred tax assets will not be realized due to the inability of certain subsidiaries to generate sufficient taxable income.

Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts
Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States. We ceased writing this business in 2007. Guarantees which are payable on death are referred to as guaranteed minimum death benefits (GMDB). Guarantees on living benefits (GLB) consist mainly of guaranteed minimum income benefits (GMIB). For further description of this product and related accounting treatment, refer to Note 1 j) to the Consolidated Financial Statements.

Guaranteed living benefits (GLB) derivatives
Our GLB reinsurance is classified as a derivative for accounting purposes and therefore carried at fair value. Changes in fair value are reflected in Net realized gains (losses) in the Consolidated statements of operations.

Determination of GLB fair value
The fair value of GLB reinsurance is estimated using an internal valuation model, which includes current market information and estimates of policyholder behavior from the perspective of a theoretical market participant that would assume these liabilities. All of our treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of more timely market information. Due to the inherent uncertainties of the assumptions used in the valuation models to determine the fair value of these derivative products, actual experience may differ materially from the estimates reflected in our Consolidated Financial Statements.

We intend to hold these derivative contracts to maturity (i.e., the expiration of the underlying liabilities through lapse, annuitization, death, or expiration of the reinsurance contract). To partially offset the risk of changes in the fair value of GLB reinsurance contracts, we invest in derivative hedge instruments.

For further information on the estimates and assumptions used in determining the fair value of GLB reinsurance, refer to Note 4 to the Consolidated Financial Statements. For a sensitivity discussion of the effect of changes in interest rates, equity indices, and other assumptions on the fair value of GLBs, and the estimated resulting impact on our net income, refer to Item 7A.

Determination of GMDB benefit reserves
Management established benefit reserves based on a long-term benefit ratio (or loss ratio) calculated using assumptions reflecting management’s best estimate of the future performance of the GMDBvariable annuity line of business. Despite the long-term nature of the risk, the benefit ratio calculation is impacted by short-term market movements that may be judged by management to be transient. Management regularly examines both qualitative and quantitative analysis, including a review of the differential between the benefit ratio used at the most recent valuation date and the benefit ratio calculated on subsequent dates. Management regularly evaluates its estimates and uses judgment to determine the extent to which assumptions underlying the benefit ratio calculation should be adjusted. For the year ended December 31, 2020, management determined that no change to the benefit ratio was warranted.


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Risk Management
We employ a strategy to manage the financial market and policyholder behavior risks embedded in the reinsurance of variable annuity (VA) guarantees. Risk management begins with underwriting a prospective client and guarantee design, with particular focus on protecting our position from policyholder options that, because of anti-selective behavior, could adversely impact our obligation.

A second layer of risk management is the structure of the reinsurance contracts. All VA guarantee reinsurance contracts include some form of annual or aggregate claim limit(s) primarily designed to reduce our exposure to severe equity market and interest rate declines (which would cause an increase in expected claims).

A third layer of risk management is the hedging strategy which looks to mitigate both long-term economic loss over time as well as dampen income statement volatility. We owned financial market instruments as part of the hedging strategy with a fair value liability of $17 million and $13 million at December 31, 2020 and 2019, respectively. The instruments are substantially collateralized on a daily basis.

We also limit the aggregate amount of variable annuity reinsurance guarantee risk we are willing to assume. The last substantive transactions were quoted in late 2007. The aggregate number of policyholders is currently decreasing through policyholder withdrawals, annuitizations, and deaths at a rate of 5 percent to 15 percent per annum.

Note that GLB claims cannot occur for any reinsured policy until it has reached the end of its “waiting period”. As of December 31, 2020, 93 percent of the policies we reinsure reached the end of their “waiting periods”.

Collateral
Chubb maintains collateral, including letters of credit (LOC), on behalf of most of its clients in the form of qualified assets in trust or letters of credit, typically in an amount sufficient for the client to obtain statutory reserve credit for the reinsurance. The timing of the calculation and amount of the collateral varies by client according to the particulars of the reinsurance treaty and the statutory reserve guidelines of the client's domicile. Refer to "Credit Facilities" for a discussion of the LOC related to our variable annuity program.

Goodwill impairment assessment
Goodwill, which represents the excess of acquisition cost over the estimated fair value of net assets acquired, was $15.4 billion and $15.3 billion at December 31, 2020 and 2019, respectively. Goodwill is assigned to applicable reporting units of acquired entities at the time of acquisition. Our reporting units are the same as our reportable segments. For goodwill balances by reporting units, refer to Note 6 to the Consolidated Financial Statements.

Goodwill is not amortized but is subject to a periodic evaluation for impairment at least annually, or earlier if there are any indications of possible impairment. Impairment is tested at the reporting unit level. The impairment evaluation first uses a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If a reporting unit fails this qualitative assessment, a single quantitative analysis is used to measure and record the amount of the impairment.

In assessing the fair value of a reporting unit, we make assumptions and estimates about the profitability attributable to our reporting units, including:
short-term and long-term growth rates; and
estimated cost of equity and changes in long-term risk-free interest rates.

If our assumptions and estimates made in assessing the fair value of acquired entities change, we could be required to write-down the carrying value of goodwill which could be material to our results of operations in the period the charge is taken. Based on our impairment testing for 2020, we determined no impairment was required and none of our reporting units was at risk for impairment.


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Consolidated Operating Results – Years Ended December 31, 2020, 2019, and 2018
 % Change
(in millions of U.S. dollars, except for percentages)2020201920182020 vs. 20192019 vs. 2018
Net premiums written$33,820 $32,275 $30,579 4.8 %5.5 %
Net premiums written - constant dollars (1)
5.5 %7.0 %
Net premiums earned33,117 31,290 30,064 5.8 %4.1 %
Net investment income3,375 3,426 3,305 (1.5)%3.6 %
Net realized gains (losses)(498)(530)(652)(6.1)%(18.8)%
Total revenues35,994 34,186 32,717 5.3 %4.5 %
Losses and loss expenses21,710 18,730 18,067 15.9 %3.7 %
Policy benefits784 740 590 5.9 %25.5 %
Policy acquisition costs6,547 6,153 5,912 6.4 %4.1 %
Administrative expenses2,979 3,030 2,886 (1.7)%5.0 %
Interest expense516 552 641 (6.4)%(13.9)%
Other (income) expense(994)(596)(434)66.8 %37.2 %
Amortization of purchased intangibles290 305 339 (4.9)%(10.2)%
Chubb integration expenses 23 59 NM(61.7)%
Total expenses31,832 28,937 28,060 10.0 %3.1 %
Income before income tax4,162 5,249 4,657 (20.7)%12.7 %
Income tax expense629 795 695 (20.8)%14.3 %
Net income$3,533 $4,454 $3,962 (20.7)%12.4 %
NM – not meaningful
(1)On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency exchange rates as the comparable current period.


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Net Premiums Written% Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018C$ 2020 vs. 2019
Commercial casualty$6,177 $5,654 $5,204 9.2 %8.7 %9.3 %
Workers' compensation2,015 2,098 2,094 (4.0)%0.1 %(4.0)%
Professional liability4,201 3,697 3,527 13.6 %4.8 %14.0 %
Surety531 639 635 (16.9)%0.6 %(14.5)%
Commercial multiple peril (1)
1,047 983 910 6.6 %8.0 %6.6 %
Property and other short-tail lines5,231 4,468 4,016 17.1 %11.3 %18.3 %
Total Commercial P&C19,202 17,539 16,386 9.5 %7.0 %10.0 %
Agriculture1,846 1,810 1,577 2.0 %14.8 %2.0 %
Personal automobile1,550 1,786 1,695 (13.2)%5.4 %(10.0)%
Personal homeowners3,627 3,513 3,391 3.2 %3.6 %3.5 %
Personal other1,656 1,514 1,508 9.4 %0.3 %9.8 %
Total Personal lines6,833 6,813 6,594 0.3 %3.3 %1.5 %
Total Property and Casualty lines27,881 26,162 24,557 6.6 %6.5 %7.2 %
Global A&H lines (2)
3,859 4,315 4,277 (10.6)%0.9 %(9.7)%
Reinsurance lines731 649 671 12.6 %(3.2)%12.1 %
Life1,349 1,149 1,074 17.4 %7.0 %18.4 %
Total consolidated$33,820 $32,275 $30,579 4.8 %5.5 %5.5 %
(1)Commercial multiple peril represents retail package business (property and general liability).
(2)For purposes of this schedule only, A&H results from our Combined North America and International businesses, normally included in the Life Insurance and Overseas General Insurance segments, respectively, as well as the A&H results of our North America Commercial P&C segment, are included in Global A&H lines above.

The increase in net premiums written in 2020 principally reflects positive growth in commercial P&C lines globally, partially offset by negative growth in consumer P&C lines primarily from outside North America. The increase in net premiums written principally reflected new business, positive rate increases and higher renewal retention. This growth was tempered by the adverse impact of the economic contraction resulting from the COVID-19 pandemic, principally in consumer P&C lines.
The growth in commercial casualty was due to new business, positive rate increases and growth in North America, Asia and Europe, partially offset by the adverse impact of the COVID-19 pandemic, including $58 million of exposure adjustments on in-force policies which depressed growth by 1.1 percentage points.
Workers' compensation was adversely impacted by market conditions and by the adverse impact of the economic contraction resulting from the COVID-19 pandemic. The decrease included $121 million of exposure adjustments on in-force policies which depressed growth by 5.8 percentage points.
The increase in professional liability was due to new business and positive rate increases primarily in North America, Asia and Europe.
Surety decreased in North America and Latin America due to market conditions and the adverse impact of the economic contraction resulting from the COVID-19 pandemic.
Commercial multiple peril increased due to strong renewal retention and positive rate increases in North America. The increase was partially offset by the adverse impact of the economic contraction resulting from the COVID-19 pandemic.
Property and other short-tail lines increased due to new business and positive rate increases primarily in North America and Europe.
Personal lines increased primarily due to positive rate increases and strong renewal retention in homeowners business in North America, as well as growth in Europe. In addition, North America benefited from the favorable year-over-year impact of reinstatement premiums. The increase was partially offset by the impact of the COVID-19 pandemic, which caused declines in automobile business in Latin America and North America.
Global A&H lines decreased in all regions, principally from less travel volume due to the COVID-19 pandemic.
The increase in Life was primarily driven by growth in Latin America, principally driven by our expanded presence in Chile, and in the Asian international life operations.
For additional information on net premiums written, refer to the segment results discussions.

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Net Premiums Earned
Net premiums earned for short-duration contracts, typically P&C contracts, generally reflect the portion of net premiums written that were recorded as revenues for the period as the exposure periods expire. Net premiums earned for long-duration contracts, typically traditional life contracts, generally are recognized as earned when due from policyholders. Net premiums earned increased $1.8 billion, or $2.0 billion on a constant-dollar basis in 2020, comprising 8.9 percent positive growth in commercial P&C lines and 2.5 percent positive growth in consumer lines on a constant-dollar basis.

Catastrophe Losses and Prior Period Development
Catastrophe losses exclude reinstatement premiums which are additional premiums paid on certain reinsurance agreements in order to reinstate coverage that had been exhausted by loss occurrences. The reinstatement premium amount is typically a pro rata portion of the original ceded premium paid based on how much of the reinsurance limit had been exhausted. Prior period development is net of related adjustments which typically relate to either profit commission reserves or policyholder dividend reserves based on actual claim experience that develops after the policy period ends. The expense adjustments correlate to the prior period loss development on these same policies. Refer to the Non-GAAP Reconciliation section for further information on reinstatement premiums on catastrophe losses and adjustments to prior period development.

We generally define catastrophe loss events consistent with the definition of the Property Claims Service (PCS) for events in the U.S. and Canada. PCS defines a catastrophe as an event that causes damage of $25 million or more in insured losses and affects a significant number of insureds. For events outside of the U.S. and Canada, we generally use a similar definition. We also define losses from certain pandemics, such as COVID-19, as a catastrophe loss. The tables below represent catastrophe loss estimates for events that occurred in the related calendar year only. Changes in catastrophe loss estimates in the current calendar year that relate to loss events that occurred in previous calendar years are considered prior period development and are excluded from the tables below.

Catastrophe Loss Charge by Event For Full Year 2020
North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
Life InsuranceTotal excluding RIPsRIPs collected (expensed)Total including RIPs
(in millions of U.S. dollars)
Net losses
COVID-19$925 $ $ $421 $10 $24 $1,380 $(16)$1,396 
U.S. hurricanes/tropical storms429 132 1 79 86  727 7 720 
U.S. flooding, hail, tornadoes, and wind events295 191 25 9 11  531 (3)534 
U.S. wildfires61 162 1 5 1  230  230 
Civil unrest111 2  17   130  130 
International weather-related events3 6  67 15  91 2 89 
Midwest derecho37 38 8  1  84  84 
Australia storms   66   66  66 
Other7 2  26 (1) 34  34 
Total$1,868 $533 $35 $690 $123 $24 $3,273 
RIPs collected (expensed)(3)(1)(1)(15)10  (10)
Total before income tax$1,871 $534 $36 $705 $113 $24 $3,283 
Income tax benefit506 
Total after income tax$2,777 


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Catastrophe Loss Charge by Event For Full Year 2019
North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
Total excluding RIPsRIPs collected (expensed)Total including RIPs
(in millions of U.S. dollars)
Net losses
U.S. flooding, hail, tornadoes, and wind events$220 $202 $$— $$438 $— $438 
Tornado in Dallas, Texas55 145 — — 202 (11)213 
Winter-related storms74 110 193 — 193 
Hurricane Dorian26 30 — 10 74 73 
California wildfires11 45 — — — 56 — 56 
Typhoon Hagibis— — — 20 17 37 36 
Civil unrest in Hong Kong and Chile— — — 33 — 33 (4)37 
International weather-related events— 30 — 33 — 33 
Other34 — 53 13 109 108 
Total$421 $543 $$152 $51 $1,175 
RIPs collected (expensed)— (11)— (4)(12)
Total before income tax$421 $554 $$156 $48 $1,187 
Income tax benefit221 
Total after income tax$966 

Catastrophe Loss Charge by Event For Full Year 2018
North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
Total excluding RIPsRIPs collected (expensed)Total including RIPs
(in millions of U.S. dollars)
Net losses
Hurricane Michael$187 $16 $$$85 $300 $15 $285 
U.S. flooding, hail, tornadoes, and wind events (1)
162 157 — 332 — 332 
Northeast winter storms43 117 — — 165 — 165 
California wildfires51 61 58 172 (23)195 
Hurricane Florence109 29 15 14 174 173 
California mudslides120 — — 125 — 125 
Colorado rain and hail storm65 — — 73 — 73 
International weather-related events— — — 182 31 213 211 
Other16 46 — — 68 67 
Total$579 $611 $21 $206 $205 $1,622 
RIPs collected (expensed)— (26)— — 22 (4)
Total before income tax$579 $637 $21 $206 $183 $1,626 
Income tax benefit272 
Total after income tax$1,354 
(1)This grouping comprised of 34 separate events, principally impacting the southern and northeastern regions of the U.S.



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Prior Period Development

(in millions of U.S. dollars)202020192018
Favorable prior period development$395 $792 $896 

Prior period development (PPD) arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years.

Pre-tax net favorable prior period development for the year ended 2020 was $395 million, which included adverse development of $259 million for U.S. child molestation claims, predominately reviver statute-related, and $106 million adverse development related to legacy asbestos and environmental liabilities. The remaining favorable development of $760 million principally comprises 89 percent long-tail lines, principally from accident years 2016 and prior, and 11 percent short-tail lines.

Pre-tax net favorable prior period development for the year ended 2019 was $792 million, which included favorable development of $80 million in our crop insurance business and adverse development of $116 million related to legacy run-off exposures, principally asbestos and environmental liabilities. The remaining favorable development of $828 million comprised 92 percent long-tail lines, principally from accident years 2015 and prior, and 8 percent short-tail lines.

Refer to the Prior Period Development section in Note 7 to the Consolidated Financial Statements for additional information.

P&C Combined Ratio
In evaluating our segments excluding Life Insurance financial performance, we use the P&C combined ratio, the loss and loss expense ratio, the policy acquisition cost ratio, and the administrative expense ratio. We calculate these ratios by dividing the respective expense amounts by net premiums earned. We do not calculate these ratios for the Life Insurance segment as we do not use these measures to monitor or manage that segment. The P&C combined ratio is determined by adding the loss and loss expense ratio, the policy acquisition cost ratio, and the administrative expense ratio. A P&C combined ratio under 100 percent indicates underwriting income, and a combined ratio exceeding 100 percent indicates underwriting loss.
 202020192018
Loss and loss expense ratio
CAY loss ratio excluding catastrophe losses59.2 %60.8 %59.6 %
Catastrophe losses10.6 %4.1 %5.8 %
Favorable prior period development(1.3)%(2.8)%(3.3)%
Loss and loss expense ratio68.5 %62.1 %62.1 %
Policy acquisition cost ratio18.9 %19.1 %19.2 %
Administrative expense ratio8.7 %9.4 %9.3 %
P&C Combined ratio96.1 %90.6 %90.6 %
The loss and loss expense ratio increased 6.4 percentage points in 2020 principally due to higher catastrophe losses and lower favorable prior period development.

The CAY loss ratio excluding catastrophe losses decreased 1.6 percentage points in 2020 principally due to a decrease in the underlying loss ratio reflecting earned rate increases exceeding loss cost trends, better underlying claims experience, and a more average crop loss year in 2020.

Policy acquisition costs consist of commissions, premium taxes, and certain underwriting costs directly related to the successful acquisition of a new or renewal insurance contract. The policy acquisition cost ratio decreased 0.2 percentage points in 2020 due to a change in the mix of business, including less premiums earned from A&H lines that have a lower acquisition cost ratio, reflecting the impact of the COVID-19 pandemic.

The administrative expense ratio decreased 0.7 percentage points in 2020 primarily due to lower business expenses from continued expense management control, including during the COVID-19 pandemic, lower employee benefit-related expenses and the favorable impact of higher net premiums earned.

52


Policy benefits
Policy benefits represent losses on contracts classified as long-duration and generally include accident and supplemental health products, term and whole life products, endowment products, and annuities. Refer to the Life Insurance segment operating results section for further discussion.

Policy benefits were $784 million, $740 million and $590 million in 2020, 2019 and 2018, respectively, which included separate account liabilities (gains) losses of $58 million, $44 million and $(38) million, respectively. The offsetting movements of these liabilities are recorded in Other (income) expense on the Consolidated statements of operations. Excluding the separate account gains and losses, Policy benefits were $726 million in 2020 compared with $696 million, principally from new business from our expanded presence in Chile and growth in Asia.

Refer to the respective sections that follow for a discussion of Net investment income, Other (income) expense, Net realized gains (losses), Amortization of purchased intangibles, and Income tax expense.

Segment Operating Results – Years Ended December 31, 2020, 2019, and 2018

We operate through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. In addition, the results of our run-off Brandywine business, including all run-off asbestos and environmental (A&E) exposures, and the results of Westchester specialty operations for 1996 and prior years are presented within Corporate.
North America Commercial P&C Insurance

The North America Commercial P&C Insurance segment comprises operations that provide property and casualty (P&C) and accident & health (A&H) insurance and services to large, middle market, and small commercial businesses in the U.S., Canada, and Bermuda. This segment includes our North America Major Accounts and Specialty Insurance division (large corporate accounts and wholesale business), and the North America Commercial Insurance division (principally middle market and small commercial accounts).
 % Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018
Net premiums written$14,474 $13,375 $12,485 8.2 %7.1 %
Net premiums earned13,964 12,922 12,402 8.1 %4.2 %
Losses and loss expenses10,129 8,206 8,000 23.4 %2.6 %
Policy acquisition costs1,942 1,831 1,829 6.1 %0.2 %
Administrative expenses1,006 1,028 966 (2.2)%6.4 %
Underwriting income887 1,857 1,607 (52.2)%15.5 %
Net investment income2,061 2,109 2,061 (2.3)%2.3 %
Other (income) expense23 24 (4.2)%NM
Segment income$2,925 $3,942 $3,665 (25.8)%7.5 %
Loss and loss expense ratio:
CAY loss ratio excluding catastrophe losses64.2 %65.3 %64.9 %(1.1)pts0.4 pts
Catastrophe losses13.4 %3.3 %4.7 %10.1 pts(1.4)pts
Prior period development(5.1)%(5.1)%(5.1)%— pts— pts
Loss and loss expense ratio72.5 %63.5 %64.5 %9.0 pts(1.0)pt
Policy acquisition cost ratio14.0 %14.2 %14.7 %(0.2)pts(0.5)pts
Administrative expense ratio7.2 %7.9 %7.8 %(0.7)pts0.1 pts
Combined ratio93.7 %85.6 %87.0 %8.1 pts(1.4)pts
NM – not meaningful


53

Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)202020192018
Catastrophe losses (excludes reinstatement premiums)$1,868 $421 $579 
Favorable prior period development$702 $649 $610 
Refer to the tables on pages 50 - 51 for detail of catastrophe losses and Note 7 to the Consolidated Financial Statements for detail on prior period development.

Premiums
Net premiums written increased $1,099 million, or 8.2 percent in 2020, comprising positive growth of 9.6 percent in commercial P&C lines and negative growth of 13.8 percent in consumer lines. The growth in commercial P&C lines reflects positive rate increases, strong renewal retention and new business written across a number of retail and wholesale lines, including property, financial lines, excess casualty, large risk casualty, and commercial multiple peril. Net premiums written in 2020 was depressed by economic contraction resulting from the COVID-19 pandemic including $160 million of exposure adjustments on in-force policies, and lower renewal exposures and new business market limitations that impacted several lines of business, including A&H, surety, entertainment, hospitality, retail, and construction.

Net premiums earned increased $1,042 million, or 8.1 percent in 2020, due to the growth in net premiums written described above. The increase in net premiums earned was adversely impacted by the COVID-19 pandemic, including $154 million of exposure adjustments on in-force policies in 2020.

Combined Ratio
The loss and loss expense ratio increased 9.0 percentage points in 2020 due principally to higher catastrophe losses, including losses related to COVID-19 pandemic claims. The CAY loss ratio excluding catastrophe losses decreased 1.1 percentage points in 2020 primarily due to margin improvements coming from earned rate exceeding loss cost trends.

The administrative expense ratio decreased 0.7 percentage points in 2020 primarily due to lower business expenses from continued expense management control, including during the COVID-19 pandemic, lower employee benefit-related expenses, and the favorable impact of higher net premiums earned.

54

North America Personal P&C Insurance
The North America Personal P&C Insurance segment comprises operations that provide high net worth personal lines products, including homeowners and complementary products such as valuable articles, excess liability, automobile, and recreational marine insurance and services in the U.S. and Canada.

 % Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018
Net premiums written$4,920 $4,787 $4,674 2.8 %2.4 %
Net premiums earned4,866 4,694 4,593 3.7 %2.2 %
Losses and loss expenses3,187 3,043 3,229 4.7 %(5.8)%
Policy acquisition costs974 948 939 2.7 %1.0 %
Administrative expenses270 286 269 (5.4)%6.0 %
Underwriting income435 417 156 4.6 %167.2 %
Net investment income260 258 236 0.5 %9.2 %
Other (income) expense5 75.8 %117.1 %
Amortization of purchased intangibles11 12 13 (5.0)%(11.1)%
Segment income$679 $660 $378 2.8 %74.7 %
Loss and loss expense ratio:
CAY loss ratio excluding catastrophe losses53.1 %55.1 %55.8 %(2.0)pts(0.7)pts
Catastrophe losses11.0 %11.6 %13.6 %(0.6)pts(2.0)pts
Prior period development1.4 %(1.9)%0.9 %3.3 pts(2.8)pts
Loss and loss expense ratio65.5 %64.8 %70.3 %0.7 pts(5.5)pts
Policy acquisition cost ratio20.0 %20.2 %20.4 %(0.2)pts(0.2)pts
Administrative expense ratio5.6 %6.1 %5.9 %(0.5)pts0.2 pts
Combined ratio91.1 %91.1 %96.6 %— pts(5.5)pts

Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)202020192018
Catastrophe losses (excludes reinstatement premiums)$533 $543 $611 
Favorable (unfavorable) prior period development$(63)$95 $(41)
Refer to the tables on pages 50 - 51 for detail of catastrophe losses and Note 7 to the Consolidated Financial Statements for detail on prior period development.

Premiums
Net premiums written increased $133 million, or 2.8 percent for 2020, primarily due to rate increases and strong account retention across most lines. In addition, net premiums written also increased due to the favorable year-over-year impact of reinstatement premiums of $24 million. Growth was partially offset by $29 million in lower automobile premiums as a result of reduced exposures related to the conditions caused by the COVID-19 pandemic.

Net premiums earned increased $172 million, or 3.7 percent for 2020, reflecting the growth in net premiums written described above.


55

Combined Ratio
The loss and loss expense ratio increased 0.7 percentage points in 2020, primarily due to unfavorable prior period development in the current year compared to favorable prior period development in the prior year. The CAY loss ratio excluding catastrophe losses decreased 2.0 percentage points in 2020 due to better underlying claims experience reflecting indirect COVID-19 benefits and lower than expected claims frequency of weather and water losses in our homeowners line.

The administrative expense ratio decreased 0.5 percentage points in 2020 primarily due to lower employee benefit-related expenses and lower business expenses from continued expense management control, including during the COVID-19 pandemic, partially offset by normal inflationary increases.

North America Agricultural Insurance

The North America Agricultural Insurance segment comprises our North American based businesses that provide a variety of coverages in the U.S. and Canada including crop insurance, primarily Multiple Peril Crop Insurance (MPCI) and crop-hail through Rain and Hail Insurance Service, Inc. (Rain and Hail) as well as farm and ranch and specialty P&C commercial insurance products and services through our Chubb Agribusiness unit.
 % Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018
Net premiums written$1,846 $1,810 $1,577 2.0 %14.8 %
Net premiums earned1,822 1,795 1,569 1.5 %14.4 %
Losses and loss expenses1,544 1,616 1,114 (4.5)%45.1 %
Policy acquisition costs123 84 79 45.7 %6.8 %
Administrative expenses9 (9)67.2 %NM
Underwriting income146 89 385 65.3 %(77.0)%
Net investment income30 30 28 — 5.0 %
Other (income) expense1 — (33.6)%
Amortization of purchased intangibles27 28 28 (2.1)%(2.0)%
Segment income$148 $90 $383 65.1 %(76.6)%
Loss and loss expense ratio:
CAY loss ratio excluding catastrophe losses83.7 %93.5 %76.7 %(9.8)pts16.8 pts
Catastrophe losses2.0 %0.5 %1.3 %1.5 pts(0.8)pts
Prior period development(1.0)%(3.9)%(7.0)%2.9 pts3.1 pts
Loss and loss expense ratio84.7 %90.1 %71.0 %(5.4)pts19.1 pts
Policy acquisition cost ratio6.8 %4.7 %5.0 %2.1 pts(0.3)pts
Administrative expense ratio0.5 %0.3 %(0.5)%0.2 pts0.8 pts
Combined ratio92.0 %95.1 %75.5 %(3.1)pts19.6 pts
NM – not meaningful

Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)202020192018
Catastrophe losses (excludes reinstatement premiums)$35 $$21 
Favorable prior period development$10 $80 $110 
Refer to the tables on pages 50 - 51 for detail of catastrophe losses and Note 7 to the Consolidated Financial Statements for detail on prior period development.


56

For 2020, prior period development included $19 million of favorable incurred losses, partially offset by $6 million of higher acquisition costs due to lower than expected MPCI losses for the 2019 crop year and a $3 million decrease in net premiums earned related to the MPCI profit and loss calculation formula. For 2019, prior period development included $103 million of favorable incurred losses and $13 million of lower acquisition costs due to lower than expected MPCI losses for the 2018 crop year, partially offset by a $36 million decrease in net premiums earned related to the MPCI profit and loss calculation formula.

Premiums
Net premiums written increased $36 million, or 2.0 percent in 2020, primarily due to growth in our Chubb Agribusiness unit, principally farm and specialty P&C, partly offset by a decrease in MPCI premiums. Net premiums earned increased $27 million, or 1.5 percent in 2020 reflecting the growth in net premiums written described above.

Combined Ratio
The loss and loss expense ratio decreased 5.4 percentage points in 2020, reflecting a more average crop loss year in 2020. In addition, the current year had lower underlying losses in our Chubb Agribusiness unit, partially offset by lower favorable prior period development. The CAY loss ratio excluding catastrophe losses decreased 9.8 percentage points in 2020 reflecting the factors described above.

The policy acquisition cost ratio increased 2.1 percentage points in 2020, primarily due to higher agent profit sharing commission in the current year as a result of higher underwriting margin.

Overseas General Insurance

Overseas General Insurance segment comprises Chubb International and Chubb Global Markets (CGM). Chubb International comprises our international commercial P&C traditional and specialty lines serving large corporations, middle market and small customers; A&H and traditional and specialty personal lines business serving local territories outside the U.S., Bermuda, and Canada. CGM, our London-based international commercial P&C excess and surplus lines business, includes Lloyd's of London (Lloyd's) Syndicate 2488. Chubb provides funds at Lloyd's to support underwriting by Syndicate 2488 which is managed by Chubb Underwriting Agencies Limited.
 % Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018
Net premiums written$9,335 $9,262 $8,902 0.8 %4.0 %
Net premiums written - constant dollars2.9 %8.4 %
Net premiums earned9,285 8,882 8,612 4.5 %3.1 %
Losses and loss expenses5,255 4,606 4,429 14.1 %4.0 %
Policy acquisition costs2,568 2,501 2,346 2.7 %6.6 %
Administrative expenses1,034 1,033 1,014 0.1 %1.9 %
Underwriting income428 742 823 (42.4)%(9.8)%
Net investment income534 588 622 (9.2)%(5.3)%
Other (income) expense13 12 4.5 %NM
Amortization of purchased intangibles45 45 41 — 8.3 %
Segment income$904 $1,273 $1,401 (29.0)%(9.2)%
Loss and loss expense ratio:
CAY loss ratio excluding catastrophe losses50.7 %51.2 %51.5 %(0.5)pts(0.3)pts
Catastrophe losses7.5 %1.8 %2.4 %5.7 pts(0.6)pts
Prior period development(1.6)%(1.1)%(2.5)%(0.5)pts1.4 pts
Loss and loss expense ratio56.6 %51.9 %51.4 %4.7 pts0.5 pts
Policy acquisition cost ratio27.7 %28.1 %27.2 %(0.4)pts0.9 pts
Administrative expense ratio11.1 %11.6 %11.8 %(0.5)pts(0.2)pts
Combined ratio95.4 %91.6 %90.4 %3.8 pts1.2 pts
NM – not meaningful

57


Catastrophe Losses and Prior Period Development
(in millions of U.S. dollars)202020192018
Catastrophe losses (excludes reinstatement premiums)$690 $152 $206 
Favorable prior period development$150 $92 $212 
Refer to the tables on pages 50 - 51 for detail of catastrophe losses and Note 7 to the Consolidated Financial Statements for detail on prior period development.
Net Premiums Written by Region
% Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 
C$
2019
2020 vs. 2019C$ 2020 vs. 20192019 vs. 2018
Region
Europe$4,099 $3,631 $3,508 $3,655 12.9 %12.1 %3.5 %
Latin America1,928 2,277 2,181 2,066 (15.3)%(6.7)%4.4 %
Asia2,965 3,021 2,884 3,022 (1.9)%(1.9)%4.7 %
Other (1)
343 333 329 329 3.2 %4.2 %1.1 %
Net premiums written$9,335 $9,262 $8,902 $9,072 0.8 %2.9 %4.0 %
2020
% of Total
2019
% of Total
2018
% of Total
Region
Europe43 %38 %39 %
Latin America21 %25 %25 %
Asia32 %33 %32 %
Other (1)
4 %%%
Net premiums written100 %100 %100 %
(1)     Comprises Combined International, Eurasia and Africa region, and other international.
Premiums
Net premiums written increased $73 million in 2020, or $263 million on a constant-dollar basis, reflecting growth in commercial P&C lines of 10.8 percent across all regions resulting from new business, retention, and positive rate increases, partially offset by a decline in consumer lines of 6.4 percent. Net premiums written in 2020 were depressed by economic contraction resulting from the COVID-19 pandemic including $24 million of exposure adjustments on in-force policies, and lower premiums in several lines, mainly in consumer lines in Latin America, primarily automobile, and A&H in Asia, resulting from less travel volume and lower exposures.

Net premiums earned increased $403 million in 2020, or $575 million on a constant-dollar basis, reflecting the increase in net premiums written as described above and in 2019.

Combined Ratio
The loss and loss expense ratio increased 4.7 percentage points in 2020 due to higher catastrophe losses, primarily related to the COVID-19 pandemic. The CAY loss ratio excluding catastrophe losses decreased 0.5 percentage points in 2020 primarily due to a decrease in the underlying loss ratio from earned rate changes modestly above loss cost trends and a benefit from lower current accident year losses resulting from a decrease in exposures due to the COVID-19 pandemic, partially offset by lower premiums earned from A&H lines in Latin America and Asia, which have a lower loss ratio.

The policy acquisition cost ratio decreased 0.4 percentage points in 2020 primarily due to a change in the mix of business, including less premiums earned from A&H lines that have a lower acquisition cost ratio, reflecting the impact of the COVID-19 pandemic.

The administrative expense ratio decreased 0.5 percentage points in 2020 primarily due to lower business expenses from continued expense management control, including during the COVID-19 pandemic, and the favorable impact of higher net premiums earned in the current year.

58

Global Reinsurance

The Global Reinsurance segment represents our reinsurance operations comprising Chubb Tempest Re Bermuda, Chubb Tempest Re USA, Chubb Tempest Re International, and Chubb Tempest Re Canada. Global Reinsurance markets its reinsurance products worldwide primarily through reinsurance brokers under the Chubb Tempest Re brand name and provides a broad range of traditional and non-traditional reinsurance coverage to a diverse array of primary P&C companies.
    % Change  % Change
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018  2018 vs. 2017 (in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018
Net premiums written$649
 $671
 $685
 (3.2)% (2.1)%Net premiums written$731 $649 $671 12.6 %(3.2)%
Net premiums written - constant dollarsNet premiums written - constant dollars12.1 %(1.7)%
Net premiums earned654
 670
 704
 (2.3)% (4.9)%Net premiums earned698 654 670 6.7 %(2.3)%
Losses and loss expenses352
 479
 561
 (26.5)% (14.7)%Losses and loss expenses435 352 479 23.5 %(26.5)%
Policy acquisition costs169
 162
 177
 4.2% (8.4)%Policy acquisition costs174 169 162 3.0 %4.2 %
Administrative expenses35
 41
 44
 (12.7)% (8.4)%Administrative expenses37 35 41 5.2 %(12.7)%
Underwriting income (loss)98
 (12) (78) NM  84.8%Underwriting income (loss)52 98 (12)(46.8)%NM
Net investment income220
 257
 273
 (14.4)% (6.1)%Net investment income307 279 289 10.1 %(3.7)%
Other (income) expense(58) (32) (1) 80.6% NM Other (income) expense2 — NMNM
Segment income$376
 $277
 $196
 35.7% 41.3%Segment income$357 $376 $277 (5.0)%35.7 %
Net premiums written - constant dollars (1)

      (1.7)% (3.3)%
Net premiums earned - constant dollars (1)

      (0.8)% (6.0)%
Underwriting income - constant dollars (1)

      NM  84.0%
Loss and loss expense ratio:Loss and loss expense ratio:
CAY loss ratio excluding catastrophe lossesCAY loss ratio excluding catastrophe losses49.1 %50.6 %50.5 %(1.5)pts0.1 pts
Catastrophe lossesCatastrophe losses17.0 %7.6 %29.2 %9.4 pts(21.6)pts
Prior period developmentPrior period development(3.8)%(4.3)%(8.1)%0.5 pts3.8 pts
Loss and loss expense ratio53.9% 71.6% 79.8% (17.7)pts
 (8.2)pts
Loss and loss expense ratio62.3 %53.9 %71.6 %8.4 pts(17.7)pts
Policy acquisition cost ratio25.7% 24.2% 25.1% 1.5
pts
 (0.9)pts
Policy acquisition cost ratio24.9 %25.7 %24.2 %(0.8)pts1.5 pts
Administrative expense ratio5.4% 6.0% 6.3% (0.6)pts
 (0.3)pts
Administrative expense ratio5.3 %5.4 %6.0 %(0.1)pts(0.6)pts
Combined ratio85.0% 101.8% 111.2% (16.8)pts
 (9.4)pts
Combined ratio92.5 %85.0 %101.8 %7.5 pts(16.8)pts
NM – not meaningful
(1)

On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period.


65



Premiums
2019 vs. 2018
Net premiums written decreased $22 million in 2019, or $12 million on a constant-dollar basis, as an increase in new business written in property and marine lines was more than offset by an increase in ceded retrocessions, reductions in the international motor line, and higher reinstatement premiums collected in the prior year.

Net premiums earned decreased $16 million in 2019, or $5 million on a constant-dollar basis, reflecting the decrease in net premiums written described above.
2018 vs. 2017
Net premiums written decreased $14 million in 2018, or $22 million on a constant-dollar basis, primarily due to higher reinstatement premiums collected in the prior year principally relating to the 2017 natural catastrophes ($15 million year-over-year decrease) and lower renewals, which is reflective of competitive market conditions primarily in catastrophe and catastrophe exposed lines of business, partially offset by new business written in the casualty line of business.

Net premiums earned decreased $34 million in 2018, or $42 million on a constant-dollar basis, reflecting the decrease in net premiums written. The decrease was also due to $14 million of short-term treaties (less than one year in duration) earned in the prior year that were written in 2016 and 2017.
Combined Ratio
2019 vs. 2018
The loss and loss expense ratio decreased 17.7 percentage points in 2019 primarily due to lower catastrophe losses, partially offset by lower favorable prior period development.

The policy acquisition cost ratio increased 1.5 percentage points in 2019 primarily due to higher commissions paid on property and motor lines treaties with adjustable commission features, and higher reinstatement premiums collected in the prior year which have a lower acquisition cost.

The administrative expense ratio decreased 0.6 percentage points in 2019 primarily driven by lower variable costs.

2018 vs. 2017
The loss and loss expense ratio decreased 8.2 percentage points in 2018 principally due to lower catastrophe losses partially offset by lower favorable prior period development and a shift in the mix of business from property catastrophe business towards casualty business, which generally has a higher loss ratio.

The policy acquisition cost ratio decreased 0.9 percentage points in 2018 primarily due to lower acquisition expenses from proportional business sold.

The administrative expense ratio decreased 0.3 percentage points in 2018 primarily due to continued expense management.

Catastrophe Losses and Prior Period Development
(in millions of U.S dollars)202020192018
Catastrophe losses (excludes reinstatement premiums)$123 $51 $205 
Favorable prior period development$29 $29 $50 
(in millions of U.S dollars)2019
 2018
 2017
Catastrophe losses (excludes reinstatement premiums)$51
 $205
 $313
Favorable prior period development$29
 $50
 $59
Refer to the tables on pages 50 - 51 for detail of catastrophe losses and Note 7 to the Consolidated Financial Statements for detail on prior period development.
Catastrophe losses were
Premiums
Net premiums written increased $82 million in 2020 primarily from new business in casualty lines, rate increases in property catastrophe lines and favorable premium adjustments. Net premiums earned increased $44 million in 2020 reflecting the following events (referincrease in net premiums written described above.

Combined Ratio
The loss and loss expense ratio increased 8.4 percentage points in 2020 primarily due to the table on page 54):
2019: Typhoons Hagibis and Faxai; Hurricane Dorian, and other severe weather-related events primarily in the U.S.
2018: Hurricanes Florence and Michael; Typhoons Jebi and Trami; Windstorm Friederike, California Wildfires, and severe weather-related events in the U.S., Canada and Japan
2017: Hurricanes Harvey, Irma and Maria; Northern California Wildfires, and severe weather-related events in the U.S.

higher catastrophe losses.

66


CAY Loss Ratio excluding Catastrophe Losses
 2019
 2018
 2017
Loss and loss expense ratio53.9 % 71.6 % 79.8 %
Catastrophe losses(7.6)% (29.2)% (42.4)%
Favorable prior period development4.3 % 8.1 % 8.6 %
CAY loss ratio excluding catastrophe losses50.6 % 50.5 % 46.0 %

The CAY loss ratio excluding catastrophe losses remained relatively flat in 2019. The CAY loss ratio excluding catastrophe losses increased 4.5decreased 1.5 percentage points in 20182020 primarily from a shift in mix of business towards catastrophe lines which have a lower loss ratio.

The policy acquisition cost ratio decreased 0.8 percentage points in 2020 primarily due to a shift in the mix of business from property catastrophe business towards casualty businesslines which generally has a higher loss ratiohave lower acquisition costs and higher losses in our U.S. property lines.favorable expense adjustments on prior period development.


59

Life Insurance

The Life Insurance segment comprises Chubb's international life operations, Chubb Tempest Life Re (Chubb Life Re), and the North American supplemental A&H and life business of Combined Insurance. We assess the performance of our life business based on Life Insurance underwriting income, which includes Net investment income and (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP.
 % Change
(in millions of U.S. dollars, except for percentages)2020201920182020 vs. 20192019 vs. 2018
Net premiums written$2,514 $2,392 $2,270 5.1 %5.3 %
Net premiums written - constant dollars5.6 %6.4 %
Net premiums earned2,482 2,343 2,218 5.9 %5.6 %
Losses and loss expenses724 757 766 (4.4)%(1.1)%
Policy benefits726 696 628 4.3 %10.8 %
Policy acquisition costs766 620 557 23.6 %11.2 %
Administrative expenses320 323 310 (1.0)%4.5 %
Net investment income385 373 341 3.3 %9.2 %
Life Insurance underwriting income331 320 298 3.6 %6.9 %
Other (income) expense(74)(48)(12)53.1 %NM
Amortization of purchased intangibles4 100.0 %— 
Segment income$401 $366 $308 9.8 %18.6 %
NM – not meaningful
     % Change 
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018
 2018 vs. 2017
Net premiums written$2,392
 $2,270
 $2,141
 5.3 % 6.1%
Net premiums earned2,343
 2,218
 2,101
 5.6 % 5.6%
Losses and loss expenses757
 766
 739
 (1.1)% 3.7%
Adjusted policy benefits696
 628
 579
 10.8 % 8.5%
Policy acquisition costs620
 557
 530
 11.2 % 5.1%
Administrative expenses323
 310
 303
 4.5 % 2.3%
Net investment income373
 341
 313
 9.2 % 8.9%
Life Insurance underwriting income320
 298
 263
 6.9 % 13.3%
Other (income) expense(48) (12) 13
 NM
 NM
Amortization of purchased intangibles2
 2
 2
 
 
Segment income$366
 $308
 $248
 18.6 % 24.2%
Net premiums written - constant dollars (1)

      6.4 % 5.7%
Net premiums earned - constant dollars (1)

      6.6 % 5.3%
Life Insurance underwriting income - constant dollars (1)

      8.1 % 13.9%
NM – not meaningful         

(1)
On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period.

Premiums
2019 vs. 2018
Net premiums written increased $122 million in 2019,2020, or $143$134 million on a constant-dollar basis, primarily reflecting growth in our Asian and Latin American international life operations of 23.4 percent, principally driven by our expanded presence in Chile and North American Combined Insurance supplemental A&H program,growth in Asia, partially offset by our life reinsurance business, which continues toa decline as no new life reinsurance business is being written.

2018 vs. 2017
Net premiums written increased $129 million in 2018, or $123 million on a constant-dollar basis, primarily due to growth in our North AmericanAmerica Combined Insurance supplemental A&H program business and Asian and Latin American international life operations, partially offset by our life reinsurance business, which continues to decline as no new life reinsurance business is being written.of 6.1 percent.


67



Deposits
The following table presents deposits collected on universal life and investment contracts:
 % Change  % Change
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018
 
C$ (1) 2019 vs. 2018

 2018 vs. 2017
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 2019C$ 2020 vs. 20192019 vs. 2018
Deposits collected on universal life and investment contracts$1,463
 $1,538
 $1,436
 (4.9)% (2.3)% 7.1%Deposits collected on universal life and investment contracts$1,559 $1,463 $1,538 6.5 %3.7 %(4.9)%
(1)

On a constant-dollar basis. Amounts are calculated by translating prior period results using the same local currency rates as the comparable current period. 

Deposits collected on universal life and investment contracts (life deposits) are not reflected as revenues in our Consolidated statements of operations in accordance with GAAP. New life deposits are an important component of production, and although they do not significantly affect current period income from operations, they are key to our efforts to grow our business. Life deposits collected decreasedincreased $96 million, or $56 million on a constant-dollar basis, in 20192020, due to growth in Taiwan that more than offset the declines in Taiwan, driven byother Asian markets, principally Hong Kong and Korea, as a result of competitive market conditions and Hong Kong, due to the civil unrest negatively impacting growth in the second halfimpact of the year, partially offset by growth in Vietnam. Foreign exchange unfavorably impacted growth by $40 million in 2019.COVID-19 pandemic.

Life deposits collected increased in 2018 due to growth in Korea, Taiwan, and Vietnam. Foreign exchange favorably impacted growth by $14 million in 2018.

Life Insurance underwriting income and Segment income
2019 vs. 2018
Life Insurance underwriting income increased $22$11 million in 2019 compared2020, primarily due to 2018, principally reflecting an increase in net investment income, partially offset by a favorable reserve development in the prior year. Additionally, segmentcurrent year which more than offset COVID-19 related losses of $24 million. Segment income benefited fromincreased $35 million primarily due to higher life insurance underwriting income and $26 million of higher other income, of $48 million in 2019 compared to $12 million in 2018, principally due to our share of net income from our investment in Huatai Life, our partially-owned life insurance entity in China.

2018 vs. 201760
Life Insurance underwriting income increased $35 million in 2018 compared to 2017 primarily due to an increase in net investment income as well as growth as described above.



68


Corporate

Corporate results primarily include the results of our non-insurance companies, income and expenses not attributable to reportable segments and loss and loss expenses of asbestos and environmental (A&E) liabilities and certain other non-A&E run-off exposures.

Our exposure to A&E claims principally arises out of liabilities acquired when we purchased Westchester Specialty in 1998, CIGNA’s P&C business in 1999, and legacy Chubb Corp A&E claims in 2016. Corporate staff expenses and net investment income of Chubb Limited, including the amortization of the fair value adjustment on acquired invested assets and debt, interest expense, amortization of purchased intangibles related to the Chubb Corp acquisition, and Chubb integration expenses are reported within Corporate.
   % Change 
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
 2019 vs. 2018
 2018 vs. 2017
Losses and loss expenses$158
 $53
 $285
 203.0 % (81.4)%
Administrative expenses319
 295
 267
 8.1 % 10.5 %
Underwriting loss477
 348
 552
 36.6 % (37.0)%
Net investment income (loss)(125) (209) (283) (40.5)% (26.1)%
Interest expense552
 641
 607
 (13.9)% 5.6 %
Adjusted net realized gains (losses)(522) (649) 91
 (19.7)% NM
Other (income) expense(459) (406) (318) 12.6 % 27.7 %
Amortization of purchased intangibles218
 255
 168
 (14.3)% 51.8 %
Chubb integration expenses23
 59
 310
 (61.7)% (81.0)%
Income tax expense (benefit)795
 695
 (139) 14.4 % NM
Net loss$(2,253) $(2,450) $(1,372) (8.1)% 78.6 %
NM – not meaningful         

 % Change
(in millions of U.S. dollars, except for percentages)2020 2019 2018 2020 vs. 20192019 vs. 2018
Losses and loss expenses$435 $158 $53 176.4 %203.0 %
Administrative expenses303 319 295 (5.0)%8.1 %
Underwriting loss738 477 348 54.8 %36.6 %
Net investment income (loss)(87)(125)(209)(30.8)%(40.5)%
Interest expense516 552 641 (6.4)%(13.9)%
Net realized gains (losses)(499)(522)(649)(4.6)%(19.7)%
Other (income) expense(791)(459)(406)72.7 %12.6 %
Amortization of purchased intangibles203 218 255 (6.9)%(14.3)%
Chubb integration expenses 23 59 NM(61.7)%
Income tax expense629 795 695 (20.8)%14.4 %
Net loss$(1,881)$(2,253)$(2,450)(16.5)%(8.1)%
NM – not meaningful
Losses and loss expenses in 2019, 2018, and 2017 were primarily from adverse development relating to our Brandywine asbestos and environmental exposures, non-A&E run-off casualty exposure, including workers' compensation, and unallocated loss adjustment expenses of the A&E claims operations. In addition, 2018Losses and loss expenses in 2020 included favorable reinsurance settlementsunfavorable prior period development of $205 million.$254 million for U.S. child molestation claims, predominantly reviver statute-related. Refer to Note 7 of the Consolidated Financial Statements for further information.

Administrative expenses increased $24 million and $28decreased $16 million in 2019 and 2018, respectively,2020, primarily due to higher global advertising expenses.

Chubb integrationlower employee benefit-related expenses, are one-time in nature and are not relatedlower travel-related costs relating to the on-going business activities of the segments. The Chief Executive Officer does not manage segment results or allocate resources to segments when considering these costs and they are therefore excluded from our definition of segment income. Chubb integration expenses in 2019 principally consisted of small residual items related to the Chubb acquisition. Chubb integration expenses for 2018 were $59 million and principally consisted of personnel-related expenses ($18 million) and rebranding ($14 million).COVID-19 pandemic.

Refer to the respective sections that follow for a discussion of Net realized gains (losses), Net investment income, Interest expense, Other (income) expense, Net realized gains and losses, Amortization of purchased intangibles, and Income tax expense.

Net Realized and Unrealized Gains (Losses)

We take a long-term view with our investment strategy, and our investment managers manage our investment portfolio to maximize total return within certain specific guidelines designed to minimize risk. The majority of our investment portfolio is available for sale and reported at fair value. Our held to maturity investment portfolio is reported at amortized cost, net of valuation allowance.

The effect of market movements on our fixed maturities portfolio impacts Net income (through Net realized gains (losses)) when securities are sold, when we write down an asset, or when we record a change to the valuation allowance for expected credit losses. For a further discussion related to how we assess the valuation allowance for expected credit losses and the related impact on Net income, refer to Note 1 e) to the Consolidated Financial Statements. Additionally, Net income is impacted through the reporting of changes in the fair value of equity securities, private equityfunds where we own less than three percent, and derivatives, including financial futures, options, swaps, and GLB reinsurance. Changes in unrealized appreciation and depreciation on available for sale securities, resulting from the revaluation of securities held, changes in cumulative foreign currency translation adjustment, and unrealized postretirement benefit obligations liability adjustment, are reported as separate components of Accumulated other comprehensive income in Shareholders’ equity in the Consolidated balance sheets.


61

The following table presents our net realized and unrealized gains (losses):
Year Ended December 31
 202020192018
(in millions of U.S. dollars)
Net
Realized
Gains
(Losses)
Net
Unrealized
Gains
(Losses)
Net
Impact
Net
Realized
Gains
(Losses)
Net
Unrealized
Gains
(Losses)
Net
Impact
Net
Realized
Gains
(Losses)
Fixed maturities$(281)$2,604 $2,323 $(31)$3,738 $3,707 $(302)
Fixed income and equity derivatives81  81 (435)— (435)(75)
Public equity
Sales455  455 58 — 58 70 
Mark-to-market131  131 46 — 46 (129)
Private equity (less than 3 percent ownership)
Sales   (5)— (5)121 
Mark-to-market(32) (32)(15)— (15)(126)
Total investment portfolio
354 2,604 2,958 (382)3,738 3,356 (441)
Variable annuity reinsurance derivative transactions, net of applicable hedges(310) (310)(142)— (142)(252)
Other derivatives1  1 (8)— (8)(3)
Foreign exchange(483)306 (177)13 20 131 
Other (1)
(60)(244)(304)(5)(79)(84)(87)
Net gains (losses), pre-tax$(498)$2,666 $2,168 $(530)$3,672 $3,142 $(652)
(1)     Net unrealized gains (losses) includes our postretirement programs of $(232) million, $(76) million, and $(321) million for the years ended December 31, 2020, 2019, and 2018, respectively.

The $2,958 million gain in our investment portfolio was principally a result of narrowing of credit spreads in our corporate bond portfolio and a decline in interest rates, partially offset by $170 million of impairments for securities we intended to sell, and securities written to market entering default.

The realized losses relating to the variable annuity reinsurance derivative transactions in 2020 and 2019 reflected an increase in the fair value of GLB liabilities due to lower interest rates and changes made to our valuation model relating to policyholder behavior, partially offset by higher global equity markets. Included in the realized loss are derivative instruments that decrease in fair value when the S&P 500 index increases. During the years ended December 31, 2020 and 2019, we experienced realized losses of $108 million and $138 million respectively, related to these derivative instruments.

Effective income tax rate
Our effective income tax rate was 15.1 percent in both 2020 and 2019 and 14.9 percent in 2018. Our effective income tax rate reflects a mix of income or losses in jurisdictions with a wide range of tax rates, permanent differences between USU.S. GAAP and local tax laws, and the timingimpact of recording discrete items. A change in the geographic mix of earnings could impact our effective tax rate.

In 2019, 2018, and 2017, our effective income tax rate was 15.1 percent, 14.9 percent, and (3.7) percent, respectively. The effective income tax rate in 20182020 was favorably impacted by an increasethe higher level of catastrophe losses, principally COVID-19, and lower realized losses compared to the provisional benefit recorded related to the impact of the 2017 Tax Act. The effective income tax rate in 2017 included the favorable income tax benefit of $450 million,


69


which represented our best estimate of the impact of the 2017 Tax Act. In addition, the income tax benefit in 2017 reflected the significant catastrophe losses in theprior year.

The 2017 Tax Cuts and Jobs Act (2017 Tax Act) included provisions for Global Intangible Low-Taxed Income (GILTI) under which taxes may be imposed on income of U.S.-owned foreign subsidiaries and for a Base Erosion and Anti-Abuse Tax (BEAT) under which taxes mayour U.S. companies could be imposed onsubject to additional tax as a result, among other things, of certain payments to affiliated foreignnon-U.S. companies. There remain substantial uncertainties in the interpretation of GILTI and BEAT and portions of the formal guidance issued to date are still in part in proposed form. Finalization of the proposed guidance, and changes to the interpretations and assumptions related to these provisions may impact amounts recorded with respect to the international provisions of the 2017 Tax Act, which may be material in the period the adjustment is recorded. Refer to Note 8 to the Consolidated Financial Statements for additional information on the 2017 Tax Act.information.

Our effective income tax rate reflects the lower corporate tax rates that prevailed outside the United States on income attributed to certain foreign operations, including 7.83 percent in Switzerland and 0.0 percent in Bermuda. During 2019, approximately 42 percent

62


Non-GAAP Reconciliation

In presenting our results, we included and discussed certain non-GAAP measures. These non-GAAP measures, which may be defined differently by other companies, are important for an understanding of our overall results of operations and financial condition. However, they should not be viewed as a substitute for measures determined in accordance with generally accepted accounting principles (GAAP).

Adjusted interest expenseBook value per common share, is shareholders’ equity divided by the shares outstanding. Tangible book value per common share, is shareholders’ equity less goodwill and adjustedother intangible assets, net investment incomeof tax, divided by the shares outstanding. We believe that goodwill and other intangible assets are non-GAAP financial measures which exclude amortizationnot indicative of our underlying insurance results or trends and make book value comparisons to less acquisitive peer companies less meaningful. The calculation of tangible book value per share does not consider the fair value adjustment on assumed long-term debtembedded goodwill attributable to our investments in partially-owned insurance companies until we attain majority ownership and acquired invested assets, respectively, related to the Chubb Corp acquisition due to the size and complexity of this acquisition. Refer to the Interest Expense section for a reconciliation of interest expense to adjusted interest expense.

consolidate.

We provide financial measures, including net premiums written, net premiums earned, and underwriting income on a constant-dollar basis. We believe it is useful to evaluate the trends inour resultsexclusive of the effect of fluctuations in exchange rates between the U.S. dollar and the currencies in which our international business is transacted, as these exchange rates could fluctuate significantly between periods and distort the analysis of trends. The impact is determined by assuming constant foreign exchange rates between periods by translating prior period results using the same local currency exchange rates as the comparable current period.

Adjusted policy benefits include gains and losses from fair value changes in separate account assets, as well as the offsetting
movement in separate account liabilities, for purposes of reporting Life Insurance underwriting income. The gains and losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP have been reclassified from Other (income) expense. We view gains and losses from fair value changes in both separate account assets and liabilities as part of the results of our underwriting operations, and therefore these gains and losses are reclassified to adjusted policy benefits.

The following table presents a reconciliation of Policy benefits to Adjusted policy benefits:
 Year Ended 
 December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Policy benefits$740
 $590
 $676
Add: (Gains) losses from fair value changes in separate account assets(44) 38
 (97)
Adjusted policy benefits$696
 $628
 $579

P&C performance metrics comprise consolidated operating results (including Corporate) and exclude the operating results of the Life Insurance segment. We believe that these measures are useful and meaningful to investors as they are used by management to assess the company’s P&C operations which are the most economically similar. We exclude the Life Insurance segment because the results of this business do not always correlate with the results of our P&C operations.


70



P&C combined ratio is the sum of the loss and loss expense ratio, policy acquisition cost ratio and the administrative expense ratio excluding the life business and including the realized gains and losses on the crop derivatives. These derivatives were purchased to provide economic benefit, in a manner similar to reinsurance protection, in the event that a significant decline in commodity pricing impacts underwriting results. We view gains and losses on these derivatives as part of the results of our underwriting operations.

CAY P&C combined ratio excluding catastrophe losses (CATs) excludes CATs and prior period development (PPD) from the P&C combined ratio. We exclude CATs as they are not predictable as to timing and amount and PPD as these unexpected loss developments on historical reserves are not indicative of our current underwriting performance. The combined ratio numerator is adjusted to exclude CATs, net premiums earned adjustments on PPD, prior period expense adjustments and reinstatement premiums on PPD, and the denominator is adjusted to exclude net premiums earned adjustments on PPD and reinstatement premiums on CATs and PPD. In periods where there are adjustments on loss sensitive policies, these adjustments are excluded from PPD and net premiums earned when calculating the ratios. We believe this measure provides a better evaluation of our underwriting performance and enhances the understanding of the trends in our P&C business that may be obscured by these items. This measure is commonly reported among our peer companies and allows for a better comparison.

Reinstatement premiums are additional premiums paid on certain reinsurance agreements in order to reinstate coverage that had been exhausted by loss occurrences. The reinstatement premium amount is typically a pro rata portion of the original ceded premium paid based on how much of the reinsurance limit had been exhausted.

Net premiums earned adjustments within PPD are adjustments to the initial premium earned on retrospectively rated policies based on actual claim experience that develops after the policy period ends. The premium adjustments correlate to the prior period loss development on these same policies and are fully earned in the period the adjustments are recorded.

Prior period expense adjustments typically relate to adjustable commission reserves or policyholder dividend reserves based on actual claim experience that develops after the policy period ends. The expense adjustments correlate to the prior period loss development on these same policies.

For this disclosure purpose, the normalized level of CATs, or expected level of CATs, is not intended to represent a probability weighted expectation for the company but rather to represent management's view of what might be more typical for a given period based on various factors, including historical experience, seasonal patterns, and consideration of both modeled CATs (e.g., windstorm and earthquake) as well as non-modeled CATs (e.g., wildfires, floods and freeze).

The following table presents CATs above (below) expected level and the impact on the combined ratio:
 Year Ended 
 December 31 
(in millions of U.S. dollars, except for percentage points)2019
 2018
 2017
Actual level of CATs - pre-tax$1,187
 $1,626
 $2,746
Less: Expected level of CATs - pre-tax969
 937
 908
CATs above expected level - pre-tax$218
 $689
 $1,838
Adverse impact of CATs above an expected level on combined ratio0.7% 2.5% 6.8%



71


The following tables present the calculation of combined ratio, as reported for each segment to P&C combined ratio, adjusted for catastrophe losses (CATs) and PPD:
  North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 
Global
Reinsurance

 Corporate
 Total P&C
For the Year Ended
December 31, 2019
(in millions of U.S. dollars except for ratios)
Numerator              
Losses and loss expenses              
Losses and loss expenses $8,206
 $3,043
 $1,608
 $4,606
 $352
 $158
 $17,973
Realized (gains) losses on crop derivatives 
 
 8
 
 
 
 8
Adjusted losses and loss expensesA$8,206
 $3,043
 $1,616
 $4,606
 $352
 $158
 $17,981
Catastrophe losses and related adjustments              
Catastrophe losses, net of related adjustments (421) (554) (8) (156) (48) 
 (1,187)
Reinstatement premiums collected (expensed) on catastrophe losses 
 (11) 
 (4) 3
 
 (12)
Catastrophe losses, gross of related adjustments (421)

(543)
(8)

(152)
(51)


(1,175)
PPD and related adjustments             

PPD, net of related adjustments - favorable (unfavorable) 649
 95
 80
 92
 29
 (153) 792
Net premiums earned adjustments on PPD - unfavorable (favorable) 38
 
 36
 
 1
 
 75
Expense adjustments - unfavorable (favorable) (3) 
 (13) 
 (1) 
 (17)
PPD reinstatement premiums - unfavorable (favorable) (1) (4) 
 1
 (1) 
 (5)
PPD, gross of related adjustments - favorable (unfavorable) 683
 91
 103
 93
 28
 (153) 845
CAY loss and loss expense ex CATsB$8,468
 $2,591
 $1,711
 $4,547
 $329
 $5
 $17,651
Policy acquisition costs and administrative expenses   
 
 
 
 

 

Policy acquisition costs and administrative expensesC$2,859
 $1,234
 $90
 $3,534
 $204
 $319
 $8,240
Expense adjustments - favorable (unfavorable) 3
 
 13
 
 1
 
 17
Policy acquisition costs and administrative expenses, adjustedD$2,862
 $1,234
 $103
 $3,534
 $205
 $319
 $8,257
Denominator             

Net premiums earnedE$12,922
 $4,694
 $1,795
 $8,882
 $654
   $28,947
Reinstatement premiums (collected) expensed on catastrophe losses

 
 11


 4
 (3)   12
Net premiums earned adjustments on PPD - unfavorable (favorable) 38
 
 36
 
 1
   75
PPD reinstatement premiums - unfavorable (favorable) (1)
(4) 

1
 (1)   (5)
Net premiums earned excluding adjustmentsF$12,959
 $4,701
 $1,831
 $8,887
 $651
   $29,029
P&C Combined ratio              
Loss and loss expense ratioA/E63.5% 64.8% 90.1% 51.9% 53.9%   62.1%
Policy acquisition cost and administrative expense ratioC/E22.1% 26.3% 5.0% 39.7% 31.1%   28.5%
P&C Combined ratio 85.6% 91.1% 95.1% 91.6% 85.0%   90.6%
CAY P&C Combined ratio ex CATs              
Loss and loss expense ratio, adjustedB/F65.3% 55.1% 93.5% 51.2% 50.6%   60.8%
Policy acquisition cost and administrative expense ratio, adjustedD/F22.1% 26.3% 5.6% 39.7% 31.5%   28.4%
CAY P&C Combined ratio ex CATs 87.4% 81.4% 99.1% 90.9% 82.1%   89.2%
Combined ratio              
Combined ratio             90.6%
Add: impact of gains and losses on crop derivatives             
P&C Combined ratio             90.6%
Note: The ratios above are calculated using whole U.S. dollars. Accordingly, calculations using rounded amounts may differ. Letters A, B, C, D, E and F included in the table are references for calculating the ratios above.

63

72


North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
CorporateTotal P&C
For the Year EndedFor the Year Ended
December 31, 2020December 31, 2020
(in millions of U.S. dollars except for ratios)(in millions of U.S. dollars except for ratios)
NumeratorNumerator
 North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 
Global
Reinsurance

 Corporate
 Total P&C
For the Year Ended
December 31, 2018
(in millions of U.S. dollars except for ratios)
Numerator              
Losses and loss expenses              Losses and loss expensesA$10,129 $3,187 $1,544 $5,255 $435 $435 $20,985 
Losses and loss expenses $8,000
 $3,229
 $1,111
 $4,429
 $479
 $53
 $17,301
Realized (gains) losses on crop derivatives 
 
 3
 
 
 
 3
Adjusted losses and loss expensesA$8,000

$3,229

$1,114

$4,429

$479

$53

$17,304
Catastrophe losses and related adjustments             

Catastrophe losses and related adjustments
Catastrophe losses, net of related adjustments (579) (637) (21) (206) (183) 
 (1,626)Catastrophe losses, net of related adjustments(1,871)(534)(36)(705)(113) (3,259)
Reinstatement premiums collected (expensed) on catastrophe losses 
 (26) 
 
 22
 
 (4)Reinstatement premiums collected (expensed) on catastrophe losses(3)(1)(1)(15)10  (10)
Catastrophe losses, gross of related adjustments (579)
(611)
(21)
(206)
(205)


(1,622)Catastrophe losses, gross of related adjustments(1,868)(533)(35)(690)(123) (3,249)
PPD and related adjustments              PPD and related adjustments
PPD, net of related adjustments - favorable (unfavorable) 610
 (41) 110
 212
 50
 (45) 896
PPD, net of related adjustments - favorable (unfavorable)702 (63)10 150 29 (433)395 
Net premiums earned adjustments on PPD - unfavorable (favorable) 29
 
 40
 
 8
 
 77
Net premiums earned adjustments on PPD - unfavorable (favorable)32  3    35 
Expense adjustments - unfavorable (favorable) 7
 
 (10) 
 (1) 
 (4)Expense adjustments - unfavorable (favorable)(1) 6  (2) 3 
PPD reinstatement premiums - unfavorable (favorable) 7
 1
 
 4
 
 
 12
PPD reinstatement premiums - unfavorable (favorable) (18)  (1) (19)
PPD, gross of related adjustments - favorable (unfavorable) 653

(40)
140

216

57

(45) 981
PPD, gross of related adjustments - favorable (unfavorable)733 (81)19 150 26 (433)414 
CAY loss and loss expense ex CATsB$8,074
 $2,578
 $1,233
 $4,439
 $331
 $8
 $16,663
CAY loss and loss expense ex CATsB$8,994 $2,573 $1,528 $4,715 $338 $2 $18,150 
Policy acquisition costs and administrative expenses              Policy acquisition costs and administrative expenses
Policy acquisition costs and administrative expensesC$2,795
 $1,208
 $70
 $3,360
 $203
 $295
 $7,931
Policy acquisition costs and administrative expensesC$2,948 $1,244 $132 $3,602 $211 $303 $8,440 
Expense adjustments - favorable (unfavorable) (7) 
 10
 
 1
 
 4
Expense adjustments - favorable (unfavorable)1  (6) 2  (3)
Policy acquisition costs and administrative expenses, adjustedD$2,788
 $1,208
 $80
 $3,360
 $204
 $295
 $7,935
Policy acquisition costs and administrative expenses, adjustedD$2,949 $1,244 $126 $3,602 $213 $303 $8,437 
Denominator             

Denominator
Net premiums earnedE$12,402
 $4,593
 $1,569
 $8,612
 $670
   $27,846
Net premiums earnedE$13,964 $4,866 $1,822 $9,285 $698 $30,635 
Reinstatement premiums (collected) expensed on catastrophe losses

 
 26
 
 
 (22)   4
Reinstatement premiums (collected) expensed on catastrophe losses3 1 1 15 (10)10 
Net premiums earned adjustments on PPD - unfavorable (favorable) 29
 

40
 
 8
   77
Net premiums earned adjustments on PPD - unfavorable (favorable)32  3   35 
PPD reinstatement premiums - unfavorable (favorable) 7
 1
 
 4
 
   12
PPD reinstatement premiums - unfavorable (favorable) (18)  (1)(19)
Net premiums earned excluding adjustmentsF$12,438
 $4,620
 $1,609
 $8,616
 $656
   $27,939
Net premiums earned excluding adjustmentsF$13,999 $4,849 $1,826 $9,300 $687 $30,661 
P&C Combined ratio              P&C Combined ratio
Loss and loss expense ratioA/E64.5% 70.3% 71.0% 51.4% 71.6%   62.1%Loss and loss expense ratioA/E72.5 %65.5 %84.7 %56.6 %62.3 %68.5 %
Policy acquisition cost and administrative expense ratioC/E22.5% 26.3% 4.5% 39.0% 30.2%   28.5%Policy acquisition cost and administrative expense ratioC/E21.2 %25.6 %7.3 %38.8 %30.2 %27.6 %
P&C Combined ratio 87.0% 96.6% 75.5% 90.4% 101.8%   90.6%P&C Combined ratio93.7 %91.1 %92.0 %95.4 %92.5 %96.1 %
CAY P&C Combined ratio ex CATs              CAY P&C Combined ratio ex CATs
Loss and loss expense ratio, adjustedB/F64.9% 55.8% 76.7% 51.5% 50.5%   59.6%Loss and loss expense ratio, adjustedB/F64.2 %53.1 %83.7 %50.7 %49.1 %59.2 %
Policy acquisition cost and administrative expense ratio, adjustedD/F22.4% 26.1% 4.9% 39.0% 31.1%   28.4%Policy acquisition cost and administrative expense ratio, adjustedD/F21.1 %25.6 %6.8 %38.7 %31.0 %27.5 %
CAY P&C Combined ratio ex CATs 87.3% 81.9% 81.6% 90.5% 81.6%   88.0%CAY P&C Combined ratio ex CATs85.3 %78.7 %90.5 %89.4 %80.1 %86.7 %
Combined ratio              Combined ratio
Combined ratio             90.6%Combined ratio96.1 %
Add: impact of gains and losses on crop derivatives             
Add: impact of gains and losses on crop derivatives 
P&C Combined ratio             90.6%P&C Combined ratio96.1 %
Note: The ratios above are calculated using whole U.S. dollars. Accordingly, calculations using rounded amounts may differ. Letters A, B, C, D, E and F included in the table are references for calculating the ratios above.


64



73


North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
CorporateTotal P&C
For the Year Ended
December 31, 2019
(in millions of U.S. dollars except for ratios)
Numerator
Losses and loss expensesA$8,206 $3,043 $1,616 $4,606 $352 $158 $17,981 
Catastrophe losses and related adjustments
Catastrophe losses, net of related adjustments(421)(554)(8)(156)(48)— (1,187)
Reinstatement premiums collected (expensed) on catastrophe losses— (11)— (4)— (12)
Catastrophe losses, gross of related adjustments(421)(543)(8)(152)(51)— (1,175)
PPD and related adjustments
PPD, net of related adjustments - favorable (unfavorable)649 95 80 92 29 (153)792 
Net premiums earned adjustments on PPD - unfavorable (favorable)38 — 36 — — 75 
Expense adjustments - unfavorable (favorable)(3)— (13)— (1)— (17)
PPD reinstatement premiums - unfavorable (favorable)(1)(4)— (1)— (5)
PPD, gross of related adjustments - favorable (unfavorable)683 91 103 93 28 (153)845 
CAY loss and loss expense ex CATsB$8,468 $2,591 $1,711 $4,547 $329 $$17,651 
Policy acquisition costs and administrative expenses
Policy acquisition costs and administrative expensesC$2,859 $1,234 $90 $3,534 $204 $319 $8,240 
Expense adjustments - favorable (unfavorable)— 13 — — 17 
Policy acquisition costs and administrative expenses, adjustedD$2,862 $1,234 $103 $3,534 $205 $319 $8,257 
Denominator
Net premiums earnedE$12,922 $4,694 $1,795 $8,882 $654 $28,947 
Reinstatement premiums (collected) expensed on catastrophe losses— 11 — (3)12 
Net premiums earned adjustments on PPD - unfavorable (favorable)38 — 36 — 75 
PPD reinstatement premiums - unfavorable (favorable)(1)(4)— (1)(5)
Net premiums earned excluding adjustmentsF$12,959 $4,701 $1,831 $8,887 $651 $29,029 
P&C Combined ratio
Loss and loss expense ratioA/E63.5 %64.8 %90.1 %51.9 %53.9 %62.1 %
Policy acquisition cost and administrative expense ratioC/E22.1 %26.3 %5.0 %39.7 %31.1 %28.5 %
P&C Combined ratio85.6 %91.1 %95.1 %91.6 %85.0 %90.6 %
CAY P&C Combined ratio ex CATs
Loss and loss expense ratio, adjustedB/F65.3 %55.1 %93.5 %51.2 %50.6 %60.8 %
Policy acquisition cost and administrative expense ratio, adjustedD/F22.1 %26.3 %5.6 %39.7 %31.5 %28.4 %
CAY P&C Combined ratio ex CATs87.4 %81.4 %99.1 %90.9 %82.1 %89.2 %
Combined ratio
Combined ratio90.6 %
Add: impact of gains and losses on crop derivatives— 
P&C Combined ratio90.6 %

Note: The ratios above are calculated using whole U.S. dollars. Accordingly, calculations using rounded amounts may differ. Letters A, B, C, D, E and F included in the table are references for calculating the ratios above.


65


North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
CorporateTotal P&C
For the Year Ended
December 31, 2018
(in millions of U.S. dollars except for ratios)
Numerator
Losses and loss expensesA$8,000 $3,229 $1,114 $4,429 $479 $53 $17,304 
Catastrophe losses and related adjustments
Catastrophe losses, net of related adjustments(579)(637)(21)(206)(183)— (1,626)
Reinstatement premiums collected (expensed) on catastrophe losses— (26)— — 22 — (4)
Catastrophe losses, gross of related adjustments(579)(611)(21)(206)(205)— (1,622)
PPD and related adjustments
PPD, net of related adjustments - favorable (unfavorable)610 (41)110 212 50 (45)896 
Net premiums earned adjustments on PPD - unfavorable (favorable)29 — 40 — — 77 
Expense adjustments - unfavorable (favorable)— (10)— (1)— (4)
PPD reinstatement premiums - unfavorable (favorable)— — — 12 
PPD, gross of related adjustments - favorable (unfavorable)653 (40)140 216 57 (45)981 
CAY loss and loss expense ex CATsB$8,074 $2,578 $1,233 $4,439 $331 $$16,663 
Policy acquisition costs and administrative expenses
Policy acquisition costs and administrative expensesC$2,795 $1,208 $70 $3,360 $203 $295 $7,931 
Expense adjustments - favorable (unfavorable)(7)— 10 — — 
Policy acquisition costs and administrative expenses, adjustedD$2,788 $1,208 $80 $3,360 $204 $295 $7,935 
Denominator
Net premiums earnedE$12,402 $4,593 $1,569 $8,612 $670 $27,846 
Reinstatement premiums (collected) expensed on catastrophe losses— 26 — — (22)
Net premiums earned adjustments on PPD - unfavorable (favorable)29 — 40 — 77 
PPD reinstatement premiums - unfavorable (favorable)— — 12 
Net premiums earned excluding adjustmentsF$12,438 $4,620 $1,609 $8,616 $656 $27,939 
P&C Combined ratio
Loss and loss expense ratioA/E64.5 %70.3 %71.0 %51.4 %71.6 %62.1 %
Policy acquisition cost and administrative expense ratioC/E22.5 %26.3 %4.5 %39.0 %30.2 %28.5 %
P&C Combined ratio87.0 %96.6 %75.5 %90.4 %101.8 %90.6 %
CAY P&C Combined ratio ex CATs
Loss and loss expense ratio, adjustedB/F64.9 %55.8 %76.7 %51.5 %50.5 %59.6 %
Policy acquisition cost and administrative expense ratio, adjustedD/F22.4 %26.1 %4.9 %39.0 %31.1 %28.4 %
CAY P&C Combined ratio ex CATs87.3 %81.9 %81.6 %90.5 %81.6 %88.0 %
Combined ratio
Combined ratio90.6 %
Add: impact of gains and losses on crop derivatives— 
P&C Combined ratio90.6 %
Note: The ratios above are calculated using whole U.S. dollars. Accordingly, calculations using rounded amounts may differ. Letters A, B, C, D, E and F included in the table are references for calculating the ratios above.

66


Net Investment Income
(in millions of U.S. dollars, except for percentages)2019
 2018
 2017
Average invested assets$104,074
 $101,453
 $99,675
Net investment income (1)
$3,426
 $3,305
 $3,125
Yield on average invested assets3.3% 3.3% 3.1%
Market yield on fixed maturities2.7% 3.7% 2.9%
(1)
Includes $161 million, $248 million and $332 million of amortization expense related to the fair value adjustment of acquired invested assets related to the Chubb Corp acquisition in 2019, 2018 and 2017, respectively.

(in millions of U.S. dollars, except for percentages)2020 2019 2018 
Average invested assets$109,766 $104,074 $101,453 
Net investment income (1)
$3,375 $3,426 $3,305 
Yield on average invested assets3.1 %3.3 %3.3 %
Market yield on fixed maturities1.7 %2.7 %3.7 %
(1)Includes $116 million, $161 million and $248 million of amortization expense related to the fair value adjustment of acquired invested assets related to the Chubb Corp acquisition in 2020, 2019 and 2018, respectively.

Net investment income is influenced by a number of factors including the amounts and timing of inward and outward cash flows, the level of interest rates, and changes in overall asset allocation. Net investment income increased 3.6decreased 1.5 percent in 20192020 compared with 2018,2019, primarily due to lower reinvestment rates on new and reinvested assets, partially offset by higher average invested assets, partially offset by a reductionhigher dividends on public equities, and an increase in the usage of notional cash pooling programs and unfavorable foreign exchange. Net investment income increased 5.8 percent in 2018 compared with 2017, primarily due to higher reinvestment rates offset by lower private equity distributions.from corporate bonds called before maturity. Refer to Note 3 g)1 e) to the Consolidated Financial Statements for additional information.

For private equities where we own less than three percent, investment income is included within Net investment income in the table above. For private equities where we own more than three percent, investment income is included within Other income (expense) in the Consolidated statements of operations. Excluded from Net investment income is the mark-to-market movement for private equities, which is recorded within either Other income (expense) or Net realized gains (losses) based on our percentage of ownership. The total mark-to-market movement for private equities excluded from Net investment income was as follows:
(in millions of U.S. dollars)202020192018
Total mark-to-market gain on private equity, pre-tax$714 $449 $298 
(in millions of U.S. dollars)2019
 2018
Total mark-to-market gain on private equity, pre-tax

$449
 $298

Interest Expense

The following table presents our pre-tax interest expense for the years ended December 31, 2019 and 2018. Also presented below is our estimated pre-tax interest expense for the year ended December 31, 2020 based on our existing debt obligations as well as fees based on our expected usage of certain facilities, including letters of credit, collateral fees, and repurchase agreements.
     Estimated Interest Expense  Actual Interest Expense 
 First Quarter
 Second Quarter
 Third Quarter
 Fourth Quarter
 Full Year
 Full Year
 Full Year
(in millions of U.S. dollars)2020
 2020
 2020
 2020
 2020
 2019
 2018
Fixed interest expense based on outstanding debt$123
 $123
 $122
 $118
 $486
 $488
 $520
Variable interest expense based on expected usage18
 18
 18
 18
 72
 85
 154
Adjusted interest expense$141
 $141
 $140
 $136
 $558
 $573
 $674
Amortization of the fair value of debt assumed in the Chubb Corp acquisition(5) (5) (5) (6) (21) (21) (33)
Total interest expense, including amortization of the fair value of debt$136
 $136
 $135
 $130
 $537
 $552
 $641

Estimated 2020 fixed interest expense assumes that the $1.3 billion 2.3 percent senior notes is fully paid in November 2020 at the maturity date. Estimated variable interest expense is based on expected usage and current interest rates and may fluctuate.


74


Net Realized and Unrealized Gains (Losses)

We take a long-term view with our investment strategy, and our investment managers manage our investment portfolio to maximize total return within certain specific guidelines designed to minimize risk. The majority of our investment portfolio is available for sale and reported at fair value. Our held to maturity investment portfolio is reported at amortized cost.

The effect of market movements on our fixed maturities portfolio impacts Net income (through Net realized gains (losses)) when securities are sold or when we record an Other-than-temporary impairment (OTTI) charge. For a further discussion related to how we assess OTTI for our fixed maturities, including credit-related OTTI, and the related impact on Net income, refer to Note 3 c) to the Consolidated Financial Statements. Additionally, Net income is impacted through the reporting of changes in the fair value of equity securities and private equity securities where we own less than three percent, and derivatives, including financial futures, options, swaps, and GLB reinsurance. Changes in unrealized appreciation and depreciation on available for sale securities resulting from the revaluation of securities held, changes in cumulative foreign currency translation adjustment, and unrealized postretirement benefit obligations liability adjustment, are reported as separate components of Accumulated other comprehensive income (loss) in Shareholders’ equity in the Consolidated balance sheets. The following table presents our net realized and unrealized gains (losses):
 Year Ended December 31 
 2019  2018  2017
(in millions of U.S. dollars)
Net
Realized
Gains
(Losses) 

 
Net
Unrealized
Gains
(Losses)

 
Net
Impact

 
Net
Realized
Gains
(Losses)

 
Net
Unrealized
Gains
(Losses)

 
Net
Impact

 
Net
Realized
Gains
(Losses)

Fixed maturities$(31) $3,738
 $3,707
 $(302) $(1,996) $(2,298) $(31)
Fixed income and equity derivatives(435) 
 (435) (75) 
 (75) (11)
Public equity             
Sales58
 
 58
 70
 
 70
 16
Mark-to-market46
 
 46
 (129) 
 (129) 
Private equity (less than 3 percent ownership)             
Sales(5) 
 (5) 121
 
 121
 (11)
Mark-to-market(15) 
 (15) (126) 
 (126) 
Total investment portfolio 
(382) 3,738
 3,356
 (441) (1,996) (2,437) (37)
Variable annuity reinsurance derivative transactions, net of applicable hedges(142) 
 (142) (252) 
 (252) 103
Other derivatives(8) 
 (8) (3) 
 (3) (5)
Foreign exchange7
 13
 20
 131
 (802) (671) 36
Other (1)
(5) (79) (84) (87) (321) (408) (13)
Net gains (losses), pre-tax$(530) $3,672
 $3,142
 $(652) $(3,119) $(3,771) $84
(1)
Net unrealized gains (losses) includes our postretirement programs of $(76) million, $(321) million, and $(16) million for the years ended December 31, 2019, 2018, and 2017, respectively.

For the years ended December 31, 2019 and 2018, other-than-temporary impairments in Net realized gains (losses) include $58 million and $49 million, respectively, for fixed maturities.

The variable annuity reinsurance derivative transactions resulted in realized gains (losses), due to the (increase) decrease in the fair value of GLB liabilities of $(4) million, $(248) million, and $364 million for the years ended December 31, 2019, 2018, and 2017, respectively. The realized losses in 2019 reflected an increase in the fair value of GLB liabilities due to lower interest rates and changes made to our valuation model relating to policyholder behavior which was partially offset by higher global equity market levels. The realized losses in 2018 reflected an increase in the fair value of GLB liabilities due to lower global equity market levels, the impact of discounting future claims for one less year and changes made to our valuation model relating to policyholder behavior. In addition, we maintain positions in derivative instruments that decrease in fair value when the S&P 500 index increases. During the years ended December 31, 2019, 2018, and 2017, we experienced realized losses of $138 million, $4 million, and $261 million, respectively, related to these derivative instruments.


75



Amortization of Purchased Intangibles and Other Amortization

Amortization expense related to purchased intangibles werewas $290 million, $305 million, $339 million, and $260$339 million for the years ended December 31, 2020, 2019, 2018, and 2017,2018, respectively, and principally relates to the Chubb Corp acquisition. The decrease in amortization expense of purchased intangibles in 2019 compared to 2018 primarily reflects lower intangible amortization expense related to agency distribution relationships and renewal rights. The increase in 2018 compared to 2017 primarily reflects a lower amortization benefit from the fair value adjustment on unpaid losses and loss expenses. The amortization of purchased intangibles expense in 20202021 is expected to be $290$286 million, or approximately $73$72 million each quarter. Refer to Note 6 to the Consolidated Financial Statements under Item 8 for more information.

Reduction of deferred tax liability associated with intangible assets related to Other intangible assets (excluding the fair value adjustment on Unpaid losses and loss expense)
At December 31, 2019,2020, the deferred tax liability associated with the Other intangible assets (excluding the fair value adjustment on Unpaid losses and loss expenses) was $1,347$1,295 million.

The following table presents at December 31, 2019,2020, the expected reduction to the deferred tax liability associated with Other intangible assets (which reduces as agency distribution relationships and renewal rights, and other intangible assets amortize), at current foreign currency exchange rates for the next five years:
For the Years Ending December 31
(in millions of U.S. dollars)
Reduction to deferred tax liability associated with intangible assets
2021$68 
202267 
202361 
202456 
202552 
Total$304 
67

For the Years Ending December 31
(in millions of U.S. dollars)
Reduction to deferred tax liability associated with intangible assets
2020$72
202167
202264
202360
202455
Total$318

Amortization of the fair value adjustment on acquired invested assets and assumed long-term debt
The following table presents at December 31, 2019,2020, the expected amortization expense of the fair value adjustment on acquired invested assets, at current foreign currency exchange rates, and the expected amortization benefit from the amortization of the fair value adjustment on assumed long-term debt for the next five yearsyears:
Amortization (expense) benefit of the fair value adjustment on
For the Years Ending December 31
(in millions of U.S. dollars)
Acquired invested assets (1)
Assumed long-term debt (2)
2021$(110)$21 
2022(103)21 
2023— 21 
2024— 21 
2025— 21 
Total$(213)$105 
(1)    Recorded as follows:a reduction to Net investment income in the Consolidated statements of operations.
(2)     Recorded as a reduction to Interest expense in the Consolidated statements of operations.
 Amortization (expense) benefit of the fair value adjustment on 
For the Years Ending December 31
(in millions of U.S. dollars)
Acquired invested assets (1)

 
Assumed long-term debt (2)

2020$(130) $21
2021(110) 21
2022(92) 21
2023
 21
2024
 21
Total$(332) $105
(1)
Recorded as a reduction to Net investment income in the Consolidated statements of operations.
(2)
Recorded as a reduction to Interest expense in the Consolidated statements of operations.

The estimate of amortization expense of the fair value adjustment on acquired invested assets could vary materially based on current market conditions, bond calls, overall duration of the acquired investment portfolio, and foreign exchange.



76


Investments
Our investment portfolio is invested primarily in publicly traded, investment grade, fixed income securities with an average credit quality of A/Aa as rated by the independent investment rating services Standard and Poor’s (S&P)/ Moody’s Investors Service (Moody’s). The portfolio is externally managed by independent, professional investment managers and is broadly diversified across geographies, sectors, and issuers. Other investments principally comprise direct investments, investment funds, and limited partnerships. We hold no collateralized debt obligations in our investment portfolio, and we provide no credit default protection. We have long-standing global credit limits for our entire portfolio across the organization. Exposures are aggregated, monitored, and actively managed by our Global Credit Committee, comprising senior executives, including our Chief Financial Officer, our Chief Risk Officer, our Chief Investment Officer, and our Treasurer. We also have well-established, strict contractual investment rules requiring managers to maintain highly diversified exposures to individual issuers and closely monitor investment manager compliance with portfolio guidelines.

The average duration of our fixed income securities, including the effect of options and swaps, was 3.84.0 years and 3.73.8 years at December 31, 20192020 and 2018,2019, respectively. We estimate that a 100 basis point (bps) increase in interest rates would reduce the valuation of our fixed income portfolio by approximately $3.9$4.3 billion at December 31, 2019.2020.

We established credit loss valuation allowances as a result of our adoption of guidance on Financial Instruments - Credit Losses: Measurement of Credit Losses on Financial Instruments (CECL) on January 1, 2020. The COVID-19 global pandemic and related economic conditions adversely impacted our investment portfolio in the first half of the year. This adverse impact was mitigated by the overall high credit quality of the portfolio and the stabilization of the valuation of securities due to measures announced by the U.S. Federal Reserve, including programs to support corporate and asset backed securities. Overall, the valuation allowance decreased in 2020. Refer to Notes 1 and 3 to the Consolidated Financial Statements for additional information on expected credit losses.










68

 December 31, 2019  December 31, 2018 
(in millions of U.S. dollars)
Fair
Value

 
Cost/
Amortized
Cost

 
Fair
Value

 
Cost/
Amortized
Cost

Fixed maturities available for sale$85,488
 $82,580
 $78,470
 $79,323
Fixed maturities held to maturity13,005
 12,581
 13,259
 13,435
Short-term investments4,291
 4,291
 3,016
 3,016
 102,784
 99,452
 94,745
 95,774
Equity securities812
 812
 770
 770
Other investments6,062
 6,062
 5,277
 5,277
Total investments$109,658
 $106,326
 $100,792
 $101,821
The following table shows the fair value and cost/amortized cost, net of valuation allowance, of our invested assets:

 December 31, 2020December 31, 2019
(in millions of U.S. dollars)Fair
Value
Cost/
Amortized
Cost, Net
Fair
Value
Cost/
Amortized
Cost
Fixed maturities available for sale$90,699 $85,168 $85,488 $82,580 
Fixed maturities held to maturity12,510 11,653 13,005 12,581 
Short-term investments4,345 4,349 4,291 4,291 
107,554 101,170 102,784 99,452 
Equity securities4,027 4,027 812 812 
Other investments7,945 7,945 6,062 6,062 
Total investments$119,526 $113,142 $109,658 $106,326 

The fair value of our total investments increased $8.9$9.9 billion during the year ended December 31, 2019,2020, primarily due to unrealized appreciation driven by declining interest rates and the investing of both operating cash flowsflow and net proceeds from debt issuance. unrealized appreciation.This increase was partially offset by the payment of $1.6 billion, including collateralized deposits, to acquire additional ownership interest in Huatai Group, the payments of dividends on our Common Shares, and share repurchases.


The following tables present the marketfair value of our fixed maturities and short-term investments at December 31, 20192020 and 2018.2019. The first table lists investments according to type and the second according to S&P credit rating:
December 31, 2019  December 31, 2018  December 31, 2020December 31, 2019
(in millions of U.S. dollars, except for percentages)Market Value
 % of Total
 Market Value
 % of Total
(in millions of U.S. dollars, except for percentages)Fair Value% of TotalFair Value% of Total
Treasury / Agency$4,630
 5% $5,327
 6%
Corporate and asset-backed34,259
 33% 29,091
 31%
Mortgage-backed21,588
 21% 18,026
 19%
U.S. Treasury / AgencyU.S. Treasury / Agency$4,122 4 %$4,630 %
Corporate and asset-backed securitiesCorporate and asset-backed securities38,769 36 %34,259 33 %
Mortgage-backed securitiesMortgage-backed securities20,616 19 %21,588 21 %
Municipal12,824
 12% 16,327
 17%Municipal11,943 11 %12,824 12 %
Non-U.S.25,192
 25% 22,958
 24%Non-U.S.27,759 26 %25,192 25 %
Short-term investments4,291
 4% 3,016
 3%Short-term investments4,345 4 %4,291 %
Total$102,784
 100% $94,745
 100%Total$107,554 100 %$102,784 100 %
AAA$15,714
 15% $14,571
 15%AAA$15,622 15 %$15,714 15 %
AA37,504
 37% 36,715
 39%AA36,125 33 %37,504 37 %
A19,236
 19% 17,253
 18%A19,712 18 %19,236 19 %
BBB13,650
 13% 12,035
 13%BBB17,542 16 %13,650 13 %
BB9,474
 9% 8,363
 9%BB9,699 9 %9,474 %
B6,897
 7% 5,596
 6%B8,267 8 %6,897 %
Other309
 
 212
 
Other587 1 %309 — 
Total$102,784
 100% $94,745
 100%Total$107,554 100 %$102,784 100 %













7769


Corporate and asset-backed securities
The following table presents our 10 largest global exposures to corporate bonds by marketfair value at December 31, 2019:
2020:
(in millions of U.S. dollars)Market Value
Wells Fargo & Co$637
Bank of America Corp575
JP Morgan Chase & Co568
Comcast Corp461
HSBC Holdings Plc396
AT&T Inc392
Citigroup Inc392
Verizon Communications Inc381
Goldman Sachs Group Inc369
Morgan Stanley358

(in millions of U.S. dollars)Fair Value
Wells Fargo & Co$764
Bank of America Corp689
JP Morgan Chase & Co646
Comcast Corp528
Morgan Stanley466
Citigroup Inc443
Verizon Communications Inc418
AT&T Inc415
Goldman Sachs Group Inc405
HSBC Holdings Plc387

Mortgage-backed securities
 S&P Credit Rating  Market Value
 Amortized Cost
December 31, 2019 (in millions of U.S. dollars)AAA
 AA
 A
 BBB
 
BB and
below

 Total
 Total
Agency residential mortgage-backed (RMBS)$187
 $17,722
 $
 $
 $
 $17,909
 $17,436
Non-agency RMBS184
 32
 75
 18
 10
 319
 317
Commercial mortgage-backed2,946
 272
 136
 6
 
 3,360
 3,290
Total mortgage-backed securities$3,317
 $18,026
 $211
 $24
 $10
 $21,588
 $21,043

The following table shows the fair value and amortized cost, net of valuation allowance, of our mortgage-backed securities:
S&P Credit RatingFair ValueAmortized Cost, Net
December 31, 2020
(in millions of U.S. dollars)
AAAAAABBBBB and
below
TotalTotal
Agency residential mortgage-backed (RMBS)$126 $16,886 $ $ $ $17,012 $16,032 
Non-agency RMBS123 39 84 20 10 276 272 
Commercial mortgage-backed securities2,878 284 151 12 3 3,328 3,151 
Total mortgage-backed securities$3,127 $17,209 $235 $32 $13 $20,616 $19,455 

Municipal
As part of our overall investment strategy, we may invest in states, municipalities, and other political subdivisions fixed maturity securities (Municipal). We apply the same investment selection process described previously to our Municipal investments. The portfolio is highly diversified primarily in state general obligation bonds and essential service revenue bonds including education and utilities (water, power, and sewers).

Non-U.S.
Our exposure to the Euro results primarily from Chubb European Group SE which is headquartered in France and offers a broad range of coverages throughout the European Union, Central, and Eastern Europe. Chubb primarily invests in Euro denominated investments to support its local currency insurance obligations and required capital levels. Chubb’s local currency investment portfolios have strict contractual investment guidelines requiring managers to maintain a high quality and diversified portfolio to both sector and individual issuers. Investment portfolios are monitored daily to ensure investment manager compliance with portfolio guidelines.

Our non-U.S. investment grade fixed income portfolios are currency-matched with the insurance liabilities of our non-U.S. operations. The average credit quality of our non-U.S. fixed income securities is A and 4948 percent of our holdings are rated AAA or guaranteed by governments or quasi-government agencies. Within the context of these investment portfolios, our government and corporate bond holdings are highly diversified across industries and geographies. Issuer limits are based on credit rating (AA—two percent, A—one percent, BBB—0.5 percent of the total portfolio) and are monitored daily via an internal compliance system. We manage our indirect exposure using the same credit rating based investment approach. Accordingly, we do not believe our indirect exposure is material.



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The following table summarizes the marketfair value and amortized cost, net of valuation allowance, of our non-U.S. fixed income portfolio by country/sovereign for non-U.S. government securities at December 31, 2019:2020:
(in millions of U.S. dollars)Market Value
 Amortized Cost
Republic of Korea$1,032
 $920
United Kingdom924
 903
Canada835
 830
Federative Republic of Brazil688
 669
Kingdom of Thailand652
 558
Province of Ontario644
 634
United Mexican States567
 554
Province of Quebec496
 484
Commonwealth of Australia365
 324
Socialist Republic of Vietnam362
 277
Other Non-U.S. Government Securities 
4,890
 4,706
Total$11,455
 $10,859

(in millions of U.S. dollars)Fair ValueAmortized Cost, Net
Republic of Korea$1,085 $976 
Canada992 950 
United Kingdom907 870 
Province of Ontario728 686 
Kingdom of Thailand637 544 
United Mexican States558 534 
Province of Quebec530 493 
Federative Republic of Brazil509 496 
Commonwealth of Australia471 423 
Socialist Republic of Vietnam394 267 
Other Non-U.S. Government Securities
5,744 5,335 
Total$12,555 $11,574 

The following table summarizes the marketfair value and amortized cost, net of valuation allowance, of our non-U.S. fixed income portfolio by country/sovereign for non-U.S. corporate securities at December 31, 2019:
2020:
(in millions of U.S. dollars)Market Value
 Amortized Cost
(in millions of U.S. dollars)Fair ValueAmortized Cost, Net
United Kingdom$2,316
 $2,224
United Kingdom$2,422 $2,274 
Canada1,781
 1,735
Canada1,834 1,723 
United States (1)
1,156
 1,111
United States (1)
1,240 1,172 
France1,136
 1,088
France1,183 1,109 
Australia813
 781
Australia916 857 
Netherlands685
 656
Netherlands634 593 
GermanyGermany625 589 
Japan587
 576
Japan602 576 
Germany560
 538
Switzerland511
 490
Switzerland560 514 
China371
 362
China459 435 
Other Non-U.S. Corporate Securities3,821
 3,673
Other Non-U.S. Corporate Securities4,729 4,460 
Total$13,737
 $13,234
Total$15,204 $14,302 
(1)
(1)     The countries that are listed in the non-U.S. corporate fixed income portfolio above represent the ultimate parent company's country of risk. Non-U.S. corporate securities could be issued by foreign subsidiaries of U.S. corporations.

The countries that are listed in the non-U.S. corporate fixed income portfolio above represent the ultimate parent company's country of risk. Non-U.S. corporate securities could be issued by foreign subsidiaries of U.S. corporations.


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Below-investment grade corporate fixed income portfolio
Below-investment grade securities have different characteristics than investment grade corporate debt securities. Risk of loss from default by the borrower is greater with below-investment grade securities. Below-investment grade securities are generally unsecured and are often subordinated to other creditors of the issuer. Also, issuers of below-investment grade securities usually have higher levels of debt and are more sensitive to adverse economic conditions, such as recession or increasing interest rates, than investment grade issuers. At December 31, 2019,2020, our corporate fixed income investment portfolio included below-investment grade and non-rated securities which, in total, comprised approximately 1415 percent of our fixed income portfolio. Our below-investment grade and non-rated portfolio includes over 1,3001,400 issuers, with the greatest single exposure being $149$176 million.

We manage high-yield bonds as a distinct and separate asset class from investment grade bonds. The allocation to high-yield bonds is explicitly set by internal management and is targeted to securities in the upper tier of credit quality (BB/B). Our minimum rating for initial purchase is BB/B. TwelveFourteen external investment managers are responsible for high-yield security selection and portfolio construction. Our high-yield managers have a conservative approach to credit selection and very low historical default experience. Holdings are highly diversified across industries and generally subject to a 1.5 percent issuer limit as a percentage of high-yield allocation. We monitor position limits daily through an internal compliance system. Derivative and structured securities (e.g., credit default swaps and collateralized loan obligations) are not permitted in the high-yield portfolio.

Asbestos and Environmental (A&E)

Asbestos and environmental (A&E) reserving considerations
For asbestos, Chubb faces claims relating to policies issued to manufacturers, distributors, installers, and other parties in the chain of commerce for asbestos and products containing asbestos. Claimants will generally allege damages across an extended time period which may coincide with multiple policies covering a wide range of time periods for a single insured.

Environmental claims present exposure for remediation and defense costs associated with the contamination of property as a result of pollution.

The following table presents count information for asbestos claims by causative agent and environmental claims by account, for direct policies only:
Asbestos (by causative agent)  Environmental (by account) Asbestos (by causative agent)Environmental (by account)
2019
 2018
 2019
 2018
20202019 2020 2019 
Open at beginning of year1,838
 1,789
 1,361
 1,349
Open at beginning of year1,724 1,838 1,217 1,361 
Newly reported/reopened173
 188
 140
 149
Newly reported/reopened192 173 130 140 
Closed or otherwise disposed287
 139
 284
 137
Closed or otherwise disposed193 287 113 284 
Open at end of year1,724
 1,838
 1,217
 1,361
Open at end of year1,723 1,724 1,234 1,217 


Survival ratios are calculated by dividing the asbestos or environmental loss and allocated loss adjustment expense (ALAE) reserves by the average asbestos or environmental loss and ALAE payments for the three most recent calendar years (3-year survival ratio). The 3-year survival ratios for gross and net Asbestos loss and ALAE reserves were 5.85.9 years and 6.06.3 years, respectively. The 3-year survival ratios for gross and net Environmental loss and ALAE reserves were 4.04.9 years and 12.125.5 years, respectively. The net 3-year survival ratios were impacted by favorable reinsurance settlements in 2018. Excluding the settlements, the 3-year survival ratio for net Asbestos loss and ALAE reserves and net Environmental loss and ALAE reserves were 5.76.0 years and 4.55.2 years, respectively. Refer to the PPD section in Note 7 to the consolidated financial statements for additional information on the settlements. The survival ratios provide only a very rough depiction of reserves and are significantly impacted by a number of factors such as aggressive settlement practices, variations in gross to ceded relationships within the asbestos or environmental claims, and levels of coverage provided. Therefore, we urge caution in using these very simplistic ratios to gauge reserve adequacy.


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Catastrophe Management

We actively monitor and manage our catastrophe risk accumulation around the world, such asincluding setting risk limits based on probable maximum loss (PML) and purchasing catastrophe reinsurance. The table below presents our modeled pre-taxestimates of natural catastrophe PML, net of reinsurance, at December 31, 2019,2020, for Worldwide, U.S. hurricane and California earthquake events, based on our in-force portfolio at October 1, 20192020 and reflecting the April 1, 20192020 reinsurance program (see Natural Catastrophe Property Reinsurance Program section) as well as inuring reinsurance protection coverages. According to the model, for the 1-in-100 return period scenario, there is a one percent chance that our pre-tax annual aggregate losses incurred in any year from U.S. hurricane events could be in excess of $2,685$2,725 million (or 4.94.6 percent of our total shareholders’ equity at December 31, 2019)2020). These estimates assume that reinsurance recoverable is fully collectible.
Modeled Net Probable Maximum Loss (PML) Pre-tax
 
Worldwide (1)
U.S. Hurricane (2)
California Earthquake (3)
Annual AggregateAnnual AggregateSingle Occurrence
(in millions of U.S. dollars, except for percentages)Chubb% of Total
Shareholders’
Equity
Chubb% of Total
Shareholders’
Equity
Chubb% of Total
Shareholders’
Equity
1-in-10$1,880 3.2 %$1,099 1.8 %$142 0.2 %
1-in-100$3,982 6.7 %$2,725 4.6 %$1,302 2.2 %
1-in-250$6,604 11.1 %$4,918 8.3 %$1,475 2.5 %
(1)     Worldwide losses are comprised of losses arising only from hurricanes, typhoons, convective storms and earthquakes and do not include “non-modeled” perils such as wildfire and flood.
(2)     U.S. Hurricane losses include losses from wind and storm-surge and exclude rainfall.
 Modeled Net Probable Maximum Loss (PML) Pre-tax
 
Worldwide (1)
 
U.S. Hurricane (2)
 
California Earthquake (3)
 Annual Aggregate Annual Aggregate Single Occurrence
(in millions of U.S. dollars, except for percentages)Chubb % of Total
Shareholders’
Equity
 Chubb % of Total
Shareholders’
Equity
 Chubb % of Total
Shareholders’
Equity
1-in-10$1,873
 3.4% $1,089
 2.0% $129
 0.2%
1-in-100$3,804
 6.9% $2,685
 4.9% $1,338
 2.4%
1-in-250$6,227
 11.3% $4,698
 8.5% $1,513
 2.7%
(3)     California earthquakes include fire-following perils.
(1)

Worldwide losses are comprised of losses arising only from hurricanes, typhoons, convective storms and earthquakes and do not include “non-modeled” perils such as wildfire and flood.
(2)
U.S. Hurricane losses include losses from wind and storm-surge and exclude rainfall.
(3)
California earthquakes include fire-following perils.

The above estimates of Chubb’s loss profile are inherently uncertain for many reasons, including the following:
While the use of third-party catastrophe modeling packages to simulate potential hurricane and earthquake losses is prevalent within the insurance industry, the models are reliant upon significant meteorology, seismology, and engineering assumptions to estimate catastrophe losses. In particular, modeled catastrophe events are not always a representation of actual events and ensuing additional loss potential;
There is no universal standard in the preparation of insured data for use in the models, the running of the modeling software and interpretation of loss output. These loss estimates do not represent our potential maximum exposures and it is highly likely that our actual incurred losses would vary materially from the modeled estimates; and
The potential effects of climate change add to modeling complexity.complexity; and

Changing climate conditions could impact our exposure to natural catastrophe risks, including U.S. hurricane. Published studies by leading government, academic and professional organizations predict an increase in the expected annual frequency of Atlantic-basin hurricanes and sea level rise through the end of the century over observed historical averages. These studies contemplate expected multi-decadal impacts of climate change on sea surface temperatures, sea levels and other factors contributing to the frequency and intensity of hurricanes. Based on preliminary stress tests conducted against the Chubb portfolio, the impacts of climate change are not expected to materially impact our reported U.S. hurricane PML over the next 12 months. These tests reflect current exposures only and excludes potential mitigating factors, such as changes to building codes, public or private risk mitigation, regulation and public policy.


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Natural Catastrophe Property Reinsurance Program

Chubb’s core property catastrophe reinsurance program provides protection against natural catastrophes impacting its primary property operations (i.e., excluding our Global Reinsurance and Life Insurance segments).

We regularly review our reinsurance protection and corresponding property catastrophe exposures. This may or may not lead to the purchase of additional reinsurance prior to a program’s renewal date. In addition, prior to each renewal date, we consider how much, if any, coverage we intend to buy and we may make material changes to the current structure in light of various factors, including modeled PML assessment at various return periods, reinsurance pricing, our risk tolerance and exposures, and various other structuring considerations.

Chubb renewed its Global Property Catastrophe Reinsurance Program for our North American and International operations effective April 1, 20192020 through March 31, 2020,2021, with modest enhancementsno material changes in coverage from the expiring program. The program consists of three layers in excess of losses retained by Chubb on a per occurrence basis. In addition, Chubb also renewed its terrorism coverage (excluding nuclear, biological, chemical and radiation coverage, with an inclusion of coverage for biological and chemical coverage for personal lines) for the United States from April 1, 20192020 through March 31, 20202021 with the same limits and retention and percentage placed except that the majority of terrorism coverage is on an aggregate basis above our retentions without a reinstatement.


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Natural Catastrophe Property Reinsurance Program

Loss LocationLayer of LossCommentsNotes
United States
(excluding Alaska and Hawaii)
$0 million
$1.0 billion
Losses retained by Chubb(a)
United States
(excluding Alaska and Hawaii)
$1.0 billion
$1.21.15 billion
All natural perils and terrorism(b)
United States
(excluding Alaska and Hawaii)
$1.21.15 billion
$2.22.15 billion
All natural perils and terrorism(c)
United States
(excluding Alaska and Hawaii)
$2.22.15 billion
$3.5 billion
All natural perils and terrorism(d)
International
(including Alaska and Hawaii)
$0 million
$175 million
Losses retained by Chubb(a)
International
(including Alaska and Hawaii)
$175 million
$1.175 billion
All natural perils and terrorism(c)
Alaska, Hawaii, and Canada
$1.175 billion
$2.4752.525 billion
All natural perils and terrorism(d)
(a)     Ultimate retention will depend upon the nature of the loss and the interplay between the underlying per risk programs and certain other catastrophe programs purchased by individual business units. These other catastrophe programs have the potential to reduce our effective retention below the stated levels.
(b)     These coverages are partially placed with Reinsurers.
(c)     These coverages are both part of the same Second layer within the Global Catastrophe Program and are fully placed with Reinsurers.
(d)     These coverages are both part of the same Third layer within the Global Catastrophe Program and are fully placed with Reinsurers.
(a)
Ultimate retention will depend upon the nature of the loss and the interplay between the underlying per risk programs and certain other catastrophe programs purchased by individual business units. These other catastrophe programs have the potential to reduce our effective retention below the stated levels.
(b)
These coverages are partially placed with Reinsurers.
(c)
These coverages are both part of the same Second layer within the Global Catastrophe Program and are fully placed with Reinsurers.
(d)
These coverages are both part of the same Third layer within the Global Catastrophe Program and are fully placed with Reinsurers.

Chubb also has a property catastrophe bond in place that offers additional natural catastrophe protection for certain parts of the portfolio. The geographic scope of this coverage is from Virginia through Maine. The East Lane VI 2015 bond currently provides $250 million of coverage as part of a $427 million layer in excess of $2.0 billion retention through March 13, 2020.

Political Risk and Credit Insurance

Political risk insurance is a specialized coverage that provides clients with protection against unexpected, catastrophic political or macroeconomic events, primarily in emerging markets. We participate in this market through our Bermuda based wholly-owned subsidiary Sovereign Risk Insurance Ltd. (Sovereign), and through a unit of our London-based CGM operation. Chubb is one of the world's leading underwriters of political risk and credit insurance, has a global portfolio spread across more than 150 countries and is also a member of theThe Berne Union. Our clients include financial institutions, national export credit agencies, leading multilateral agencies, private equity firms and multinational corporations. CGM writes political risk and credit insurance business out of underwriting offices in London, United Kingdom; Hamburg, Germany; Sao Paulo, Brazil; Singapore; Tokyo, Japan; and in the U.S. in the following locations: Chicago, Illinois; New York, New York; Los Angeles California; and Washington, D.C.

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Our political risk insurance providesproducts provide protection to commercial lenders against defaults on cross border loans, insulatescovers investors against equity losses, and protects exporters against defaults on contracts. Commercial lenders, our largest client segment, are covered for missed scheduled loan repayments due to acts of confiscation, expropriation or nationalization by the host government, currency inconvertibility or exchange transfer restrictions, or war or other acts of political violence. In addition, in the case of loans to government-owned entities or loans that have a government guarantee, political risk policies cover scheduled payments against risks of non-payment or non-honoring of government guarantees. Private equity investors and corporations receive similar coverage to that of lenders, exceptcover their equity is protectedinvestments against financial losses, such as expropriatory events, inability to repatriate dividends, and physical damage to their operations caused by covered political risk events. Our export contracts protectionproduct provides coverage for both exporters and their financing banks against the risk of contract frustration due to government actions, including non-payment by governmental entities.

CGM's credit insurance businesses cover losses due to insolvency, protracted default, and political risk perils including export and license cancellation. Our credit insurance product provides coverage to larger companies that have sophisticated credit risk management systems, with exposure to multiple customers and that have the ability to self-insure losses up to a certain level through excess of loss coverage. It also provides coverage to trade finance banks, exporters, and trading companies, with exposure to trade-related financing instruments. CGM also has limited capacity for Specialist Credit insurance products which provide coverage for project finance and working capital loans for large corporations and banks.


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We have implemented structural features in our policies in order to control potential losses within the political risk and credit insurance businesses. These include basic loss sharing features that includesuch as co-insurance and deductibles, and in the case of trade credit, the use of non-qualifying losses that drop smaller exposures deemed too difficult to assess. Ultimate loss severity is also limited by using waiting periods to enable the insurer and insured to mitigate losses and to agree on recovery strategies and the subrogation of the rights of the lender/exporter to the insurer followingif a claim.claim does materialize. We have the option to pay claims over the original loan paymentrepayment schedule, rather than in a lump sum, in order to provide insureds and the insurer additional time to remedy problems and work towards full recoveries. It is important to note that political risk and credit policies are named peril conditional insurance contracts, not financial guarantees, and claims are only paid after conditions and warranties are fulfilled. Political risk and credit insurance policies do not cover currency devaluations, bond defaults, movements in overseas equity markets, transactions deemed illegal, situations where corruption or misrepresentation has occurred, or debt that is not legally enforceable. In addition to assessing and mitigating potential exposure on a policy-by-policy basis, we also have specific risk management measures in place to manage overall exposure and risk. These measures include placing country, credit, and individual transaction limits based on country risk and credit ratings, combined single loss limits on multi-country policies, the use of quota share and excess of loss reinsurance protection as well as quarterly modeling and stress-testing of the portfolio. We have a dedicated Country and Credit Risk management team that are responsible for the portfolio.

Crop Insurance

We are, and have been since the 1980s, one of the leading writers of crop insurance in the U.S. and have conducted that business through a managing general agent subsidiary of Rain and Hail. We provide protection throughout the U.S. on a variety of crops and are therefore geographically diversified, which reduces the risk of exposure to a single event or a heavy accumulation of losses in any one region. Our crop insurance business comprises two components - Multiple Peril Crop Insurance (MPCI) and crop-hail insurance.

The MPCI program, offered in conjunction with the U.S. Department of Agriculture’s Risk Management Agency (RMA), is a federal subsidized insurance program that covers revenue shortfalls or production losses due to natural causes such as drought, excessive moisture, hail, wind, freeze, insects, and disease. These Revenue Productsrevenue products are defined as providing both commodity price and yield coverages. Policies are available for various crops in different areas of the U.S. and generally have deductibles generally ranging from 10 percent to 50 percent of the insured's risk. The USDA's Risk Management Agency (RMA) sets the policy terms and conditions, rates and forms, and is also responsible for setting compliance standards. As a participant in the MPCI program, we report all details of policies to the RMA and are party to a Standard Reinsurance Agreement (SRA). The SRA sets out the relationship between private insurance companies and the Federal Crop Insurance Corporation (FCIC) concerning the terms and conditions regarding the risks each will bear including the pro-rata and state stop-loss provisions, which allows companies to limit the exposure of any one state or group of states on their underwriting results. In addition to the pro-rata and excess of loss reinsurance protections inherent in the SRA, we also purchase third-party proportional and stop-loss reinsurance

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for our MPCI business to reduce our exposure. We may also enter into crop derivative contracts to further manage our risk exposure.

Each year the RMA issues a final SRA for the subsequent reinsurance year (i.e., the 20202021 SRA covers the 20202021 reinsurance year from July 1, 20192020 through June 30, 2020)2021). There were no significant changes in the terms and conditions from the 20192020 SRA and therefore, the new SRA does not impact Chubb's outlook on the crop program relative to 2020.2021.

We recognize net premiums written as soon as estimable on our MPCI business, which is generally when we receive acreage reports from the policyholders on the various crops throughout the U.S. This allows us to best determine the premium associated with the liability that is being planted. The MPCI program has specific timeframes as to when producers must report acreage to us and in certain cases, the reporting occurs after the close of the respective reinsurance year. Once the net premium written has been recorded, the premium is then earned over the growing season for the crops. A majority of the crops that are covered in the program are typically subject to the SRA in effect at the beginning of the year. Given the major crops covered in the program, we typically see a substantial written and earned premium impact in the second and third quarters.

The pricing of MPCI premium is determined using a number of factors including commodity prices and related volatility (i.e., both impact the amount of premium we can charge to the policyholder). For example, in most states, the pricing for the MPCI Revenue Productrevenue product for corn (i.e., insurance coverage for lower than expected crop revenue in a given season) includes a factor based on the average commodity price in February. If corn commodity prices are higher in February, compared to the February price in the prior year, and all other factors are the same, the increase in price will increase the corn premium year-over-year.


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Pricing is also impacted by volatility factors, which measure the likelihood commodity prices will fluctuate over the crop year. For example, if volatility is set at a higher rate compared to the prior year, and all other factors are the same, the premium charged to the policyholder will be higher year-over-year for the same level of coverage.

Losses incurred on the MPCI business are determined using both commodity price and crop yield. With respect to commodity price, there are two important periods on a large portion of the business: The month of February when the initial premium base is set, and the month of October when the final harvest price is set. If the price declines from February to October, with yield remaining at normal levels, the policyholder may be eligible to recover on the policy. However, in most cases there are deductibles on these policies, therefore, the impact of a decline in price would have to exceed the deductible before a policyholder would be eligible to recover.

We evaluate our MPCI business at an aggregate level and the combination of all of our insured crops (both winter and summer) go into our underwriting gain or loss estimate in any given year. Typically, we do not have enough information on the harvest prices or crop yield outputs to quantify the preliminary estimated impact to our underwriting results until the fourth quarter.

Our crop-hail program is a private offering. Premium is earned on the crop-hail program over the coverage period of the policy. Given the very short nature of the growing season, most crop-hail business is typically written in the second and third quarters and the recognition of earned premium is also more heavily concentrated during this timeframe. We use industry data to develop our own rates and forms for the coverage offered. The policy primarily protects farmers against yield reduction caused by hail and/or fire, and related costs such as transit to storage. We offer various deductibles to allow the grower to partially self-insure for a reduced premium cost. We limit our crop-hail exposures through the use of township liability limits and third-party reinsurance on our net retained hail business.
Liquidity

Liquidity is a measure of a company's ability to generate cash flows sufficient to meet short-term and long-term cash requirements. As a holding company, Chubb Limited possesses assets that consist primarily of the stock of its subsidiaries and other investments. In addition to net investment income, Chubb Limited's cash flows depend primarily on dividends and other statutorily permissible payments. Historically, dividends and other statutorily permitted payments have come primarily from Chubb's Bermuda-based operating subsidiaries, which we refer to as our Bermuda subsidiaries. Our consolidated sources of funds consist primarily of net premiums written, fees, net investment income, and proceeds from sales and maturities of investments. Funds are used at our various companies primarily to pay claims, operating expenses, and dividends; to service debt; to purchase investments; and to fund acquisitions.

We anticipate that positive cash flows from operations (underwriting activities and investment income) should be sufficient to cover cash outflows under most loss scenarios for the near term. Should the need arise, we generally have access to capital

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markets and available credit facilities. Refer to “Credit Facilities” below for additional information. Our access to funds under the existing credit facility is dependent on the ability of the bank that is a party to the facility to meet its funding commitments. Should our existing credit provider experience financial difficulty, we may be required to replace credit sources, possibly in a difficult market. If we cannot obtain adequate capital or sources of credit on favorable terms, on a timely basis, or at all, our business, operating results, and financial condition could be adversely affected. To date, we have not experienced difficulty accessing our credit facility.

To further ensure the sufficiency of funds to settle unforeseen claims, we hold certain invested assets in cash and short-term investments. In addition, for certain insurance, reinsurance, or deposit contracts that tend to have relatively large and reasonably predictable cash outflows, we attempt to establish dedicated portfolios of assets that are duration-matched with the related liabilities. With respect to the duration of our overall investment portfolio, we manage asset durations to both maximize return given current market conditions and provide sufficient liquidity to cover future loss payments. At December 31, 2019,2020, the average duration of our fixed maturities (3.8(4.0 years) is less than the average expected duration of our insurance liabilities (4.3(4.7 years).

Despite our safeguards, if paid losses accelerate beyond our ability to fund such paid losses from current operating cash flows, we might need to either liquidate a portion of our investment portfolio or arrange for financing. Potential events causing such a liquidity strain could include several significant catastrophes occurring in a relatively short period of time, large uncollectible reinsurance recoverables on paid losses (as a result of coverage disputes, reinsurers' credit problems, or decreases in the value of collateral supporting reinsurance recoverables) or increases in collateral postings under our variable annuity reinsurance business. Because each subsidiary focuses on a more limited number of specific product lines than is collectively available from


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the Chubb Group of Companies, the mix of business tends to be less diverse at the subsidiary level. As a result, the probability of a liquidity strain, as described above, may be greater for individual subsidiaries than when liquidity is assessed on a consolidated basis. If such a liquidity strain were to occur in a subsidiary, we could be required to liquidate a portion of our investments, potentially at distressed prices, as well as be required to contribute capital to the particular subsidiary and/or curtail dividends from the subsidiary to support holding company operations.

The payment of dividends or other statutorily permissible distributions from our operating companies are subject to the laws and regulations applicable to each jurisdiction, as well as the need to maintain capital levels adequate to support the insurance and reinsurance operations, including financial strength ratings issued by independent rating agencies. During 2019,2020, we were able to meet all our obligations, including the payments of dividends on our Common Shares, with our net cash flows.

We assess which subsidiaries to draw dividends from based on a number of factors. Considerations such as regulatory and legal restrictions as well as the subsidiary's financial condition are paramount to the dividend decision. Chubb Limited received dividends of $200 million$1.9 billion and $75$200 million from its Bermuda subsidiaries in 2020 and 2019, respectively. Chubb Limited also received cash dividends of $110 million and 2018, respectively.non-cash dividends of $734 million from a Swiss subsidiary in 2020. There were no dividends received in 2019.

The payment of any dividends from CGM or its subsidiaries is subject to applicable U.K. insurance laws and regulations.  In addition, the release of funds by Syndicate 2488 to subsidiaries of CGM is subject to regulations promulgated by the Society of Lloyd's. Chubb Limited received no dividends from CGM in 20192020 and 2018.2019.

The U.S. insurance subsidiaries of Chubb INA Holdings Inc. (Chubb INA) may pay dividends, without prior regulatory approval, subject to restrictions set out in state law of the subsidiary's domicile (or, if applicable, commercial domicile). Chubb INA's international subsidiaries are also subject to insurance laws and regulations particular to the countries in which the subsidiaries operate. These laws and regulations sometimes include restrictions that limit the amount of dividends payable without prior approval of regulatory insurance authorities. Chubb Limited received no dividends from Chubb INA in 20192020 and 2018.2019. Debt issued by Chubb INA is serviced by statutorily permissible distributions by Chubb INA's insurance subsidiaries to Chubb INA as well as other group resources. Chubb INA received dividends of $3.7$1.2 billion and $5.2$3.7 billion from its subsidiaries in 20192020 and 2018,2019, respectively. At December 31, 2019,2020, the amount of dividends available to be paid to Chubb INA in 20192021 from its subsidiaries without prior approval of insurance regulatory authorities totals $3.1$2.7 billion.

In January 2020, Chubb INA Holdings Inc. paid $1.5 billion towards the series

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Cash Flows
Our insurance and reinsurance operations provide liquidity in that premiums are received in advance, sometimes substantially in advance, of the time claims are paid. Generally, cash flows are affected by claim payments that, due to the nature of our operations, may comprise large loss payments on a limited number of claims and which can fluctuate significantly from period to period. The irregular timing of these loss payments can create significant variations in cash flows from operations between periods. Refer to “Contractual Obligations and Commitments” for our estimate of future claim payments by period. Sources of liquidity include cash from operations, routine sales of investments, and financing arrangements. The following is a discussion of our cash flows for 2020, 2019, 2018, and 2017.2018.

Operating cash flows reflect Net income for each period, adjusted for non-cash items and changes in working capital.

Operating cash flows were $9.8 billion in 2020, compared to $6.3 billion and $5.5 billion in 2019 compared to $5.5 billion and $4.5 billion in 2018, and 2017, respectively. Operating cash flow was higherincreased $3.5 billion in 20192020 compared to 2018, primarily due to2019, principally reflecting higher underwriting cash flow, partially offset by higher taxes paid compared to 2018 principallypremiums collected and reduced payment activity due to the timing of tax payments. The increase in operating cash flows of $977 million in 2018 compared to 2017 was primarily due to higher premiums collected, net of higher catastrophe loss paymentseconomic slowdown related to the 2017 catastrophe events, and lower taxes paid principally due to the timing of tax payments.COVID-19 pandemic.

Cash used for investing was $7.5 billion in 2020, compared to $5.9 billion and $2.9 billion in 2019 compared to $2.9 billion and $2.4 billion in 2018, and 2017, respectively. The increasecurrent year included payment, including a deposit, of $1.6 billion for the purchase of an additional 16.2 percent ownership in cash used for investing of $3.0 billion in 2019 was primarily dueHuatai Group. This compares to net purchases of short-term investments of $1.1 billion in 2019 compared to net proceeds of $516 million in 2018. Additionally, the increase in 2019 was due to theprior year purchase of an additional 10.9 percent ownership interest in Huatai Group for $580 million. Cash usedRefer to Note 2 to the Consolidated Financial Statements for investing in 2018 wasadditional information. In addition, the current year included higher compared to 2017, due to higher net private equity contributions, net of distributions received, of $793 million.$1.1 billion.

Cash used for financing was $2.1 billion in 2020, compared to $151 million and $2.0 billion in 2019 compared to $2.0 billion and $2.3 billion in 2018, and 2017, respectively. Cash used for financing was lowerhigher by $1.8$1.9 billion in 20192020 compared to 20182019 primarily due to higherlower net proceeds from the


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issuance of long-term debt (net of repayments) of $2.1$2.6 billion, partially offset by higherfewer shares repurchased in the current year. Refer to Note 11 to the Consolidated Financial Statements for additional information on share repurchases of $486 million. Cash used for financing in 2018 was lower by $328 million, primarily due to higher net repayments of long-term debt in 2017.repurchases.

Both internal and external forces influence our financial condition, results of operations, and cash flows. Claim settlements, premium levels, and investment returns may be impacted by changing rates of inflation and other economic conditions. In many cases, significant periods of time, ranging up to several years or more, may lapse between the occurrence of an insured loss, the reporting of the loss to us, and the settlement of the liability for that loss.

We use repurchase agreements as a low-cost funding alternative. At December 31, 2019,2020, there were $1.4 billion in repurchase agreements outstanding with various maturities over the next fiveeight months.

In addition to cash from operations, routine sales of investments, and financing arrangements, we have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs to enhance cash management efficiency during periods of short-term timing mismatches between expected inflows and outflows of cash by currency. The programs allow us to optimize investment income by avoiding portfolio disruption. In each program, participating Chubb entities establish deposit accounts in different currencies with the bank provider. Each day the credit or debit balances in every account are notionally translated into a single currency (U.S. dollars) and then notionally pooled. The bank extends overdraft credit to all participating Chubb entities as needed, provided that the overall notionally pooled balance of all accounts in each pool at the end of each day is at least zero. Actual cash balances are not physically converted and are not commingled between legal entities. Chubb entities may incur overdraft balances as a means to address short-term liquidity needs. Any overdraft balances incurred under this program by a Chubb entity would be guaranteed by Chubb Limited (up to $300 million in the aggregate). Our syndicated letter of credit facility allows for same day drawings to fund a net pool overdraft should participating Chubb entities withdraw contributed funds from the pool.


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Capital Resources

Capital resources consist of funds deployed or available to be deployed to support our business operations.
December 31December 31
(in millions of U.S. dollars, except for percentages)20202019
Short-term debt$ $1,299 
Long-term debt14,948 13,559 
Total financial debt14,948 14,858 
Trust preferred securities308 308 
Total shareholders’ equity59,441 55,331 
Total capitalization$74,697 $70,497 
Ratio of financial debt to total capitalization20.0 %21.1 %
Ratio of financial debt plus trust preferred securities to total capitalization20.4 %21.5 %
 December 31
 December 31
(in millions of U.S. dollars, except for percentages)2019
 2018
Short-term debt$1,299
 $509
Long-term debt13,559
 12,087
Total financial debt14,858
 12,596
Trust preferred securities308
 308
Total shareholders’ equity55,331
 50,312
Total capitalization$70,497
 $63,216
Ratio of financial debt to total capitalization21.1% 19.9%
Ratio of financial debt plus trust preferred securities to total capitalization21.5% 20.4%

Repurchase agreements are excluded from the table above and are disclosed separately from short-term debt in the Consolidated balance sheets. The repurchase agreements are collateralized borrowings where we maintain the right and ability to redeem the collateral on short notice, unlike short-term debt which comprises the current maturities of our long-term debt instruments.

On September 17, 2020, Chubb INA issued $1.0 billion of 1.375 percent senior notes due September 2030. Chubb INA's $1.3 billion of 2.3 percent senior notes due November 2020 was paid upon maturity. Refer to Note 9 to the Consolidated Financial Statements for details about the debt issued and debt redeemed.

We believe our financial strength provides us with the flexibility and capacity to obtain available funds externally through debt or equity financing on both a short-term and long-term basis. Our ability to access the capital markets is dependent on, among other things, market conditions and our perceived financial strength. We have accessed both the debt and equity markets from time to time. We generally maintain the ability to issue certain classes of debt and equity securities via an unlimited Securities and Exchange Commission (SEC) shelf registration which is renewed every three years. This allows us capital market access for refinancing as well as for unforeseen or opportunistic capital needs. In October 2018, we filed an unlimited shelf registration which allows us to issue certain classes of debt and equity. This shelf registration expires in October 2021.


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Securities Repurchases
From time to time, we repurchase shares as part of our capital management program. The Board of Directors (Board) has authorized share repurchase programs as follows:

$1.0 billion of Chubb Common Shares from November 17, 2016 through December 31, 2017
$1.0 billion of Chubb Common Shares from January 1, 2018 through December 31, 2018
$1.5 billion of Chubb Common Shares from December 1, 2018 through December 31, 2019
$1.5 billion of Chubb Common Shares from November 21, 2019 through December 31, 2020

$1.0 billion of Chubb Common Shares from January 1, 2018 through December 31, 2018
$1.5 billion of Chubb Common Shares from December 1, 2018 through December 31, 2019
$1.5 billion of Chubb Common Shares from November 21, 2019 through December 31, 2020
$1.5 billion of Chubb Common Shares from November 19, 2020 through December 31, 2021

Subsequently, in February 2021, the Board approved an increase to the November 2020 share repurchase program of $1.0 billion to a total of $2.5 billion, effective through December 31, 2021.

Share repurchases may be made in the open market, in privately negotiated transactions, block trades, accelerated repurchases and/or through option or other forward transactions. In 2017,2020, 2019, and 2018 and 2019, we repurchased $830$516 million,$1.02 $1.53 billion,and $1.53$1.02 billion, respectively, of Common Shares in a series of open market transactions under the Board share repurchase authorizations. On April 22, 2020, we suspended share repurchases, given the economic environment and to preserve capital for both risk and opportunity. Subsequently we announced and then resumed share repurchases on October 29, 2020. The $1.5 billion December 2018 BoardNovember 2019 authorization remained effective through December 31, 2019, and was used in advance of the $1.5 billion share repurchase authorized in November 2019.2020. Repurchases through December 31, 2020 were made under this authorization. For the period January 1 through February 26, 2020,24, 2021, we repurchased 947,4001,971,000 Common Shares for a total of $151$327 million in a series of open market transactions.transactions under the share repurchase program authorized in November 2020. At February 26, 2020, $1.3024, 2021, $2.17 billion in share repurchase authorization remained through December 31, 2020.2021.

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Common Shares
Our Common Shares had a par value of CHF 24.15 each at December 31, 2019.2020.

As of December 31, 2019,2020, there were 27,812,29726,872,639 Common Shares in treasury with a weighted average cost of $134.98$135.58 per share.

Under Swiss law, dividends must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars.

At our May 2018 annual general meeting, our shareholders approved an annual dividend for the following year of up to $2.92 per share, which was paid in four quarterly installments of $0.73 per share at dates determined by the Board after the annual general meeting by way of a distribution from capital contribution reserves, transferred to free reserves for payment.

At our May 2019 annual general meeting, our shareholders approved an annual dividend for the following year of up to $3.00 per share, which was paid in four quarterly installments of $0.75 per share at dates determined by the Board after the annual general meeting by way of distribution from capital contribution reserves, transferred to free reserves for payment.

At our May 2020 annual general meeting, our shareholders approved an annual dividend for the following year of up to $3.12 per share, expected to be paid in four quarterly installments of $0.75$0.78 per share after the annual general meeting by way of distribution from capital contribution reserves, transferred to free reserves for payment. The Board will determine the record and payment dates at which the annual dividend may be paid until the date of the 20202021 annual general meeting, and is authorized to abstain from distributing a dividend at its discretion. The first three quarterly installments each of $0.75$0.78 per share, have been distributed by the Board as expected.

Dividend distributions on Common Shares amounted to CHF 2.942.89 ($2.98)3.09) per share for the year ended December 31, 2019.2020. Refer to Note 11 to the Consolidated Financial Statements for additional information on our dividends.



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Contractual Obligations and Commitments

The following table presents our future payments due by period under contractual obligations at December 31, 2019:2020:
Payments Due By Period
20222024
(in millions of U.S. dollars)Total2021 and 2023and 2025Thereafter
Payment amounts determinable from the respective contracts
Deposit liabilities (1)
$2,323 $34 $104 $148 $2,037 
Purchase obligations (2)
470 240 230 — — 
Investments, including Limited Partnerships (3)
3,805 1,429 1,713 459 204 
Operating leases550 150 219 106 75 
Repurchase agreements1,405 1,405 — — — 
Long-term debt (4)
14,705 — 1,475 2,346 10,884 
Trust preferred securities309 — — — 309 
Interest on debt obligations (4)
5,925 468 902 804 3,751 
Total obligations in which payment amounts are determinable from the respective contracts29,492 3,726 4,643 3,863 17,260 
Payment amounts not determinable from the respective contracts
Estimated gross loss payments under insurance and reinsurance contracts67,851 19,587 18,599 9,439 20,226 
Estimated payments for future policy benefits and GLB22,006 1,034 2,183 1,653 17,136 
Total contractual obligations and commitments$119,349 $24,347 $25,425 $14,955 $54,622 
(1)Refer to Note 1 k) to the Consolidated Financial Statements.
(2)Primarily comprises agreements with vendors to purchase system software administration and maintenance services, and audit fees.
(3)Funding commitment primarily related to limited partnerships. The timing of the payments of these commitments is uncertain and may differ from the estimated timing in the table.
(4)Subject to foreign exchange fluctuations on interest expense and principal.

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 Payments Due By Period 
     2021
 2023
  
(in millions of U.S. dollars)Total
2020
and 2022
and 2024
Thereafter
Payment amounts determinable from the respective contracts         
Deposit liabilities (1)
$2,092
 $21
 $51
 $131
 $1,889
Purchase obligations (2)
411
 159
 223
 29
 
Investments, including Limited Partnerships (3)
3,994
 1,328
 1,721
 895
 50
Huatai share acquisition deposits (4)
1,550
 1,550
 
 
 
Operating leases660
 158
 243
 154
 105
Repurchase agreements1,416
 1,416
 
 
 
Short-term debt1,301
 1,301
 
 
 
Long-term debt (5)
13,292
 
 1,000
 1,954
 10,338
Trust preferred securities309
 
 
 
 309
Interest on debt obligations (5)
6,199
 479
 898
 810
 4,012
Total obligations in which payment amounts are determinable from the respective contracts31,224
 6,412
 4,136
 3,973
 16,703
Payment amounts not determinable from the respective contracts         
Estimated gross loss payments under insurance and reinsurance contracts62,713
 17,601
 17,200
 8,731
 19,181
Estimated payments for future policy benefits20,645
 916
 1,885
 1,541
 16,303
Total contractual obligations and commitments$114,582
 $24,929
 $23,221
 $14,245
 $52,187
Refer to Note 1 k) to the Consolidated Financial Statements.
(2)
Primarily comprises audit fees and agreements with vendors to purchase system software administration and maintenance services.
(3)
Funding commitment primarily related to limited partnerships. The timing of the payments of these commitments is uncertain and may differ from the estimated timing in the table.
(4)
Chubb entered into agreements to purchase incremental ownership interests in Huatai Insurance Group Company Limited through two separate purchases, a 15.3 percent ownership interest for approximately $1.1 billion and a 7.1 percent ownership interest for approximately $493 million. The purchases are contingent upon obtaining regulatory approvals and other important conditions, which are expected to be obtained by the end of 2021. The 7.1 percent purchase is also contingent upon receipt of Chinese insurance regulatory approval of the 15.3 percent purchase. In connection with these purchase agreements, in January 2020, we paid collateralized deposits totaling $1.550 billion to the selling shareholders, which are accounted for as loans.
(5)
Subject to foreign exchange fluctuations on interest expense and principal.

The abovecontractual obligations and commitments table excludes the following items:

Pension obligations: Minimum funding requirements for our pension obligations are immaterial. Subsequent funding commitments are apt to vary due to many factors and are difficult to estimate at this time. Refer to Note 13 to the Consolidated Financial Statements for additional information.
Liabilities for unrecognized tax benefits: The liability for unrecognized tax benefits, excluding interest and offsetting tax credits, was $76 million at December 31, 2020. At December 31, 2020, we had accrued $16 million in liabilities for income tax-related interest and penalties in our Consolidated balance sheet. Other than settlement of a liability in January 2021 for $23 million, including interest, we are unable to make a reliable estimate for the timing of cash settlement of these liabilities. Refer to Note 8 to the Consolidated Financial Statements for additional information.

13 to the Consolidated Financial Statements for additional information.
Liabilities for unrecognized tax benefits: The liability for unrecognized tax benefits, excluding interest and offsetting tax credits, was $47 million at December 31, 2019. At December 31, 2019, we had accrued $8 million in liabilities for income tax-related interest and penalties in our Consolidated balance sheet. We are unable to make a reasonably reliable estimate for the timing of cash settlement with respect to these liabilities. Refer to Note 8 to the Consolidated Financial Statements for additional information.

We have no other significant contractual obligations or commitments not reflected in the table above. We do not have any off-balance sheet arrangements that are reasonably likely to have a material effect on our financial condition, revenues or expenses, results of operations, liquidity, capital expenditures, or capital resources.



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Estimated gross loss payments under insurance and reinsurance contracts
We are obligated to pay claims under insurance and reinsurance contracts for specified loss events covered under those contracts. Such loss payments represent our most significant future payment obligation as a P&C insurance and reinsurance company. In contrast to other contractual obligations, cash payments are not determinable from the terms specified within the contract. For example, we do not ultimately make a payment to our counterparty for many insurance and reinsurance contracts (i.e., when a loss event has not occurred) and if a payment is to be made, the amount and timing cannot be determined from the contract. In the table above, we estimate payments by period relating to our gross liability for unpaid losses and loss expenses included in the Consolidated balance sheet at December 31, 2019,2020, and do not take into account reinsurance recoverable. These estimated loss payments are inherently uncertain and the amount and timing of actual loss payments are likely to differ from these estimates and the differences could be material. Given the numerous factors and assumptions involved in both estimates of loss and loss expense reserves and related estimates as to the timing of future loss and loss expense payments in the table above, differences between actual and estimated loss payments will not necessarily indicate a commensurate change in ultimate loss estimates. The liability for Unpaid losses and loss expenses presented in our balance sheet is discounted for certain structured settlements, for which the timing and amount of future claim payments are reliably determinable, and certain reserves for unsettled claims. Our loss reserves are not discounted for the time value of money. Accordingly, the estimated amounts in the table exceed the liability for Unpaid losses and loss expenses presented in our balance sheet. Refer to Note 1 h) to the Consolidated Financial Statements for additional information.

Estimated payments for future policy benefits
We establish reserves for future policy benefits for life, long-term health, and annuity contracts. The amounts in the table are gross of fees or premiums due from the underlying contracts. The liability for Future policy benefits for life, long-term health, and annuity contracts presented in our balance sheet is discounted and reflected net of fees or premiums due from the underlying contracts. Accordingly, the estimated amounts in the table exceed the liability for Future policy benefits presented in our balance sheet. Payment amounts related to these reserves must be estimated and are not determinable from the contract. Due to the uncertainty with respect to the timing and amount of these payments, actual results could materially differ from the estimates in the table.

Credit Facilities

As our Bermuda subsidiaries are non-admitted insurers and reinsurers in the U.S., the terms of certain U.S. insurance and reinsurance contracts require them to provide collateral, which can be in the form of letters of credit (LOCs). LOCs may also be used for general corporate purposes.

On October 25, 2017,Should the need arise, we entered intogenerally have access to capital markets and to credit facilities with letter of credit capacity of $4.0 billion with a credit facility that provides for up to $1.0sub-limit of $1.9 billion of availability, all of which may be used for the issuance of LOC and for revolving loans. We have the ability to increase the capacity to $2.0 billion under certain conditions, but any such increase would not raise the sub-limit for revolving loans above $1.0 billion. Our existing credit facility has a remaining term expiring in October 2022.credit. At December 31, 2019,2020, our LOC usage under these facilities was $567 million.

$1.7 billion in LOCs, of which $1.1 billion related to our variable annuity reinsurance program. Our access to fundscredit under an existing credit facilitythese facilities is dependent on the ability of the banks that are a party to the facilityfacilities to meet their funding commitments. Should the existing credit providers on these facilities experience financial difficulty, we may be required to replace credit sources, possibly in a difficult market. If we cannot obtain adequate capital or sources of credit on favorable terms, on a timely basis, or at all, our business, operating results, and financial condition could be adversely affected. To date, we have not experienced difficulty accessing our credit facilities or establishing additional facilities when needed.

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In the event that such credit support is insufficient, we could beare required to provide alternative security to clients. Thisclients, the security could take the form of additional insurance trusts supported by our investment portfolio or funds withheld using our cash resources. The value of LOCs required is driven by, among other things, statutory liabilities reported by variable annuity guarantee reinsurance clients, loss development of existing reserves, the payment pattern of such reserves, the expansion of business, and loss experience of such business.

The facilityfacilities noted above requiresrequire that we maintain certain financial covenants, all of which have been met at December 31, 2019.2020. These covenants include:

(i)
(i)a minimum consolidated net worth of not less than $34.985 billion; and
(ii)a ratio of consolidated debt to total capitalization of not greater than 0.35 to 1.

$34.985 billion; and
(ii)
a ratio of consolidated debt to total capitalization of not greater than 0.35 to 1.

At December 31, 2019,2020, (a) the minimum consolidated net worth requirement under the covenant described in (i) above was $34.985 billion and our actual consolidated net worth as calculated under that covenant was $54.7$56.6 billion and (b) our ratio of debt to total capitalization, as calculated under the covenant which excludes the fair value adjustment of debt acquired through the Chubb Corp acquisition, was 0.210.20 to 1, which is below the maximum debt to total capitalization ratio of 0.35 to 1 as described in (ii) above.


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Our failure to comply with the covenants under any credit facility would, subject to grace periods in the case of certain covenants, result in an event of default. This could require us to repay any outstanding borrowings or to cash collateralize LOCs under such facility. Our failure to repay material financial obligations, as well as our failure with respect to certain other events expressly identified, would result in an event of default under the facility.

Should our existing credit provider experience financial difficulty, we may be required to replace credit sources, possibly in a difficult market. If we cannot obtain adequate capital or sources of credit on favorable terms, on a timely basis, or at all, our business, operating results, and financial condition could be adversely affected. To date, we have not experienced difficulty accessing our credit facility.

Ratings

Chubb Limited and its subsidiaries are assigned credit and financial strength (insurance) ratings from internationally recognized rating agencies, including S&P, A.M. Best, Moody's, and Fitch. The ratings issued on our companies by these agencies are announced publicly and are available directly from the agencies. Our Internet site (investors.chubb.com, under Shareholder Resources/Rating Agency Ratings) also contains some information about our ratings, but such information on our website is not incorporated by reference into this report.

Financial strength ratings reflect the rating agencies' opinions of a company's claims paying ability. Independent ratings are one of the important factors that establish our competitive position in the insurance markets. The rating agencies consider many factors in determining the financial strength rating of an insurance company, including the relative level of statutory surplus necessary to support the business operations of the company. These ratings are based upon factors relevant to policyholders, agents, and intermediaries and are not directed toward the protection of investors. Such ratings are not recommendations to buy, sell, or hold securities.

Credit ratings assess a company's ability to make timely payments of principal and interest on its debt. It is possible that, in the future, one or more of the rating agencies may reduce our existing ratings. If one or more of our ratings were downgraded, we could incur higher borrowing costs, and our ability to access the capital markets could be impacted. In addition, our insurance and reinsurance operations could be adversely impacted by a downgrade in our financial strength ratings, including a possible reduction in demand for our products in certain markets. Also, we have insurance and reinsurance contracts which contain rating triggers. In the event the S&P or A.M. Best financial strength ratings of Chubb fall, we may be faced with the cancellation of premium or be required to post collateral on our underlying obligation associated with this premium. We estimate that at December 31, 2019,2020, a one-notch downgrade of our S&P or A.M. Best financial strength ratings would result in an immaterial loss of premium or requirement for collateral to be posted.





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ITEM 7A. Quantitative and Qualitative Disclosures about Market Risk

Market Sensitive Instruments and Risk Management
Market risk represents the potential for loss due to adverse changes in the fair value of financial instruments. We are exposed to potential losses from various market risks including changes in interest rates, equity prices, and foreign currency exchange rates. Further, through writing the GLB and GMDB products, we are exposed to volatility in the equity and credit markets, as well as interest rates. Our investment portfolio consists primarily of fixed income securities, denominated in both U.S. dollars and foreign currencies, which are sensitive to changes in interest rates and foreign currency exchange rates. The majority of our fixed income portfolio is classified as available for sale. The effect of market movements on our available for sale investmentfixed maturities portfolio impacts Net income (through Net realized gains (losses)) when securities are sold, when we write down an asset, or when we record an OTTI charge in Net income.a change to the allowance for expected credit losses. Changes in interest rates and foreign currency exchange rates will have an immediate effect on Shareholders' equity and Comprehensive income and in certain instances, Net income. From time to time, we also use derivative instruments such as futures, options, swaps, and foreign currency forward contracts to manage the duration of our investment portfolio and foreign currency exposures and also to obtain exposure to a particular financial market. At December 31, 20192020 and 2018,2019, our notional exposure to derivative instruments was $4.9$5.3 billion and $9.1$4.9 billion, respectively. These instruments are recognized as assets or liabilities in our consolidated financial statementsConsolidated Financial Statements and are sensitive to changes in interest rates, foreign currency exchange rates, and equity security prices. As part of our investing activities, from time to time we purchase to be announced mortgage backed securities (TBAs). Changes in the fair value of TBAs are included in Net realized gains (losses) and therefore, have an immediate effect on both our Net income and Shareholders' equity.


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We seek to mitigate market risk using a number of techniques, including maintaining and managing the assets and liabilities of our international operations consistent with the foreign currencies of the underlying insurance and reinsurance businesses, thereby limiting exchange rate risk to net assets denominated in foreign currencies.

The following is a discussion of our primary market risk exposures at December 31, 2019.2020. Our policies to address these risks in 20192020 were not materially different from 2018.2019. We do not currently anticipate significant changes in our primary market risk exposures or in how those exposures are managed in future reporting periods based upon what is known or expected to be in effect in future reporting periods.

Interest rate risk – fixed income portfolio and debt obligations
Our fixed income portfolio and debt obligations have exposure to interest rate risk. Changes in investment values attributable to interest rate changes are mitigated by corresponding and partially offsetting changes in the economic value of our insurance reserves and debt obligations. We monitor this exposure through periodic reviews of our asset and liability positions.

The following table presents the impact at December 31, 20192020 and 2018,2019, on the fair value of our fixed income portfolio of a hypothetical increase in interest rates of 100 bps applied instantly across the U.S. yield curve (an immediate time horizon was used as this presents the worst case scenario):
(in billions of U.S. dollars, except for percentages)2020 2019 
Fair value of fixed income portfolio$107.6 $102.8 
Pre-tax impact of 100 bps increase in interest rates:
Decrease in dollars$4.3 $3.9 
As a percentage of total fixed income portfolio at fair value4.0 %3.8 %
(in billions of U.S. dollars, except for percentages)2019
 2018
Fair value of fixed income portfolio$102.8
 $94.7
Pre-tax impact of 100 bps increase in interest rates:   
 Decrease in dollars$3.9
 $3.5
 As a percentage of total fixed income portfolio at fair value3.8% 3.7%

Changes in interest rates will have an immediate effect on Comprehensive income and Shareholders' equity but will not ordinarily have an immediate effect on Net income. Variations in market interest rates could produce significant changes in the timing of prepayments due to available prepayment options. For these reasons, actual results could differ from those reflected in the tables.

Although our debt and trust preferred securities (collectively referred to as debt obligations) are reported at amortized cost and not adjusted for fair value changes, changes in interest rates could have a material impact on their fair value, albeit there would be no impact on our consolidated financial statements.Consolidated Financial Statements.


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The following table presents the impact at December 31, 20192020 and 2018,2019, on the fair value of our debt obligations of a hypothetical decrease in interest rates of 100 bps applied instantly across the U.S. yield curve (an immediate time horizon was used as this presents the worst case scenario):
(in millions of U.S. dollars, except for percentages)2020 2019 
Fair value of debt obligations, including repurchase agreements$19,365 $18,238 
Pre-tax impact of 100 bps decrease in interest rates:
Increase in dollars$1,673 $1,570 
As a percentage of total debt obligations at fair value8.6 %8.6 %
(in millions of U.S. dollars, except for percentages)2019
 2018
Fair value of debt obligations, including repurchase agreements$18,238
 $14,524
Pre-tax impact of 100 bps decrease in interest rates:   
 Increase in dollars$1,570
 $1,201
 As a percentage of total debt obligations at fair value8.6% 8.3%



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Foreign currency management
As a global company, Chubb entities transact business in multiple currencies. Our policy is to generally match assets, liabilities and required capital for each individual jurisdiction in local currency, which would include the use of derivatives. We do not hedge our net asset non-U.S. dollar capital positions; however, we do consider hedging for planned cross border transactions.

The following table summarizes the net assets (liabilities) in non-U.S. currencies at December 31, 20192020 and 2018:2019:
   2019
   2018
 2019 vs. 2018 % change in exchange rate per USD
2020 2019 2020 vs. 2019 % change in exchange rate per USD
(in millions of U.S. dollars, except for percentages) 
Value of
Net Assets

 
Exchange
rate
per USD

 Value of
Net Assets

 Exchange
rate
per USD

 (in millions of U.S. dollars, except for percentages)Value of
net assets (liabilities)
Exchange
rate
per USD
Value of
net assets (liabilities)
Exchange
rate
per USD
Chinese yuan renminbi (CNY)Chinese yuan renminbi (CNY)$2,853 0.1532$1,539 0.1436 6.7 %
Canadian dollar (CAD) $2,220
 0.7698 $2,114
 0.7333
 5.0 %Canadian dollar (CAD)2,613 0.78582,220 0.7698 2.1 %
British pound sterling (GBP) 2,024
 1.3257 1,901
 1.2754
 3.9 %British pound sterling (GBP)2,492 1.36702,024 1.3257 3.1 %
Euro (EUR) 1,675
 1.1213 1,896
 1.1467
 (2.2)%
Australian dollar (AUD) 1,100
 0.7021 1,149
 0.7049
 (0.4)%Australian dollar (AUD)1,347 0.76941,100 0.7021 9.6 %
Brazilian real (BRL) 990
 0.2485 938
 0.2577
 (3.6)%
Mexican peso (MXN) 942
 0.0528 729
 0.0509
 3.7 %Mexican peso (MXN)877 0.0502942 0.0528 (5.0)%
Korean won (KRW) (x100) 788
 0.0865 726
 0.0900
 (3.9)%Korean won (KRW) (x100)781 0.0920788 0.0865 6.4 %
Hong Kong dollar (HKD) 653
 0.1284 362
 0.1277
 0.5 %
Brazilian real (BRL)Brazilian real (BRL)747 0.1926990 0.2485 (22.5)%
Japanese yen (JPY)Japanese yen (JPY)617 0.0097432 0.0092 5.2 %
Thai baht (THB) 606
 0.0337 459
 0.0309
 9.1 %Thai baht (THB)565 0.0334606 0.0337 (0.8)%
Chilean peso (CLP) (x100) 489
 0.1328 28
 0.1441
 (7.8)%
Euro denominated debt (1)
 (4,804) 1.1213
 (2,016) 1.1467
 (2.2)%
Euro (EUR) (1)
Euro (EUR) (1)
(3,162)1.2216(3,129)1.1213 8.9 %
Other foreign currencies 2,474
 various
 2,106
 various
 NM
Other foreign currencies3,016 various2,845 variousNM
Value of net assets denominated in foreign currencies (2)
 $9,157
 
 $10,392
 
  
Value of net assets denominated in foreign currencies (2)
$12,746 $10,357 
As a percentage of total net assets 16.6%   20.7%    As a percentage of total net assets21.4 %18.7 %
Pre-tax decrease to Shareholders' equity of a hypothetical 10 percent strengthening of the U.S. dollar $832
   $945
    
Pre-tax decrease to Shareholders' equity of a hypothetical 10 percent strengthening of the USDPre-tax decrease to Shareholders' equity of a hypothetical 10 percent strengthening of the USD$1,159 $942 
NM – not meaningful
(1)
(1)     Comprised Euro denominated debt of $5.2 billion, partially offset by net assets of $2.1 billion at December 31, 2020 and Euro denominated debt of $4.8 billion, partially offset by net assets of $1.7 billion at December 31, 2019.
Refer to Note 9 to the Consolidated Financial Statements for additional information.
(2)
At December 31, 2019, net assets denominated in foreign currencies comprised approximately 6 percent tangible assets and 94 percent intangible assets, primarily goodwill.

Effective July 1, 2018, Argentina was designated as a highly inflationary economy and therefore we changed the functional currency for our Argentine operations from the Argentine Peso to the U.S. dollar. Our(2)     At December 31, 2020, net assets denominated in the Argentine Peso represented less than 0.1foreign currencies comprised approximately 46 percent of consolidated shareholders’ equity. Therefore, this change in the functional currency of our Argentine operations did not have a material impact on our financial condition or results of operations.goodwill and other intangible assets.


















9284


Reinsurance of GMDB and GLB guarantees
Chubb views its variable annuity reinsurance business as having a similar risk profile to that of catastrophe reinsurance with the probability of long-term economic loss relatively small, at the time of pricing. Adverse changes in market factors and policyholder behavior will have an impact on both realized gains (losses) and net income for GLB and both Life Insurance underwriting income and net income.income for GMDB. When evaluating these risks, we expect to be compensated for taking both the risk of a cumulative long-term economic net loss, as well as the short-term accounting variations caused by these market movements. Therefore, we evaluate this business in terms of its long-term economic risk and reward.

NetFor the GMDB reinsurance business, net income is directly impacted by changes in future policy benefit reserves calculated in connection withreserves. For the GLB reinsurance of variable annuity guarantees. In addition,business, net income is directly impacted by changes in the fair value of the GLB liability (FVL), which is classified as a derivative for accounting purposes. The FVL established for a GLB reinsurance contract represents the difference between the fair value of the contract and the benefit reserves. Benefit reserves and FVL calculations arecalculation is directly affected by market factors, including equity levels, interest rate levels, credit risk, and implied volatilities, as well as policyholder behaviors, such as annuitization and lapse rates, and policyholder mortality.

The tables below are estimates of the sensitivities to instantaneous changes in economic inputs (e.g., equity shock, interest rate shock, etc.) or actuarial assumptions at December 31, 20192020 of the FVL and of the fair value of specific derivative instruments held (hedge value) to partially offset the risk in the variable annuity guarantee reinsurance portfolio. The following assumptions should be considered when using the below tables:
No changes to the benefit ratio used to establish benefit reserves at December 31, 2019.
Equity shocks impact all global equity markets equally
Our liabilities are sensitive to global equity markets in the following proportions: 75 percent—85 percent U.S. equity, and 15 percent—25 percent international equity.
75 percent85 percent U.S. equity, and 15 percent25 percent international equity.
Our current hedge portfolio is sensitive only to U.S. equity markets.
We would suggest using the S&P 500 index as a proxy for U.S. equity, and the MSCI EAFE index as a proxy for international equity.
Interest rate shocks assume a parallel shift in the U.S. yield curve
Our liabilities are also sensitive to global interest rates at various points on the yield curve, mainly the U.S. Treasury curve in the following proportions: 5 percent—15 percent short-term rates (maturing in less than 5 years), 15 percent—25 percent medium-term rates (maturing between 5 years and 10 years, inclusive), and 65 percent—75 percent long-term rates (maturing beyond 10 years).
5 percent15 percent short-term rates (maturing in less than 5 years), 25 percent35 percent medium-term rates (maturing between 5 years and 10 years, inclusive), and 55 percent65 percent long-term rates (maturing beyond 10 years).
A change in AA-rated credit spreads impacts the rate used to discount cash flows in the fair value model. AA-rated credit spreads are a proxy for both our own credit spreads and the credit spreads of the ceding insurers.
The hedge sensitivity is from December 31, 2020 market levels and only applicable to the equity and interest rate sensitivities table below.
December 31, 2019 market levels and only applicable to the equity and interest rate sensitivities table below.
The sensitivities are not directly additive because changes in one factor will affect the sensitivity to changes in other factors. The sensitivities do not scale linearly and may be proportionally greater for larger movements in the market factors. The sensitivities may also vary due to foreign exchange rate fluctuations. The calculation of the FVL is based on internal models that include assumptions regarding future policyholder behavior, including lapse, annuitization, and asset allocation. These assumptions impact both the absolute level of the FVL as well as the sensitivities to changes in market factors shown below. Actual sensitivity of our net income may differ from those disclosed in the tables below due to differences betweenfluctuations in short-term market movementsmovements.
In addition, the tables below do not reflect the expected quarterly run rate of net income generated by the variable annuity guarantee reinsurance portfolio if markets remain unchanged during the period. All else equal, if markets remain unchanged during the period, the FVL will increase, resulting in a realized loss. This realized loss occurs primarily because the guarantees provided in the underlying contracts continue to become more valuable even when markets remain unchanged. We refer to this increase in FVL as “timing effect”. The unfavorable impact of timing effect on our FVL in a quarter is not reflected in the sensitivity tables below. For this reason, when using the tables below to estimate the sensitivity of FVL in the first quarter 2021 to various changes, it is necessary to assume an additional $5 million to $45 million increase in FVL and management judgment regardingrealized losses. Note that both the long-term assumptions implicit in our benefit ratios.timing effect and the quarterly run rate impact to net income change over time as the book ages.
In addition, the tables below do not reflect the expected quarterly run rate of net income generated by the variable annuity guarantee reinsurance portfolio if markets remain unchanged during the period. All else equal, if markets remain unchanged during the period, the Gross FVL will increase, resulting in a realized loss. This realized loss occurs primarily because the guarantees provided in the underlying contracts continue to become more valuable even when markets remain unchanged. We refer to this increase in Gross FVL as “timing effect”. The unfavorable impact of timing effect on our Gross FVL in a quarter is not reflected in the sensitivity tables below. For this reason, when using the tables below to estimate the sensitivity of Gross FVL in the first quarter 2020 to various changes, it is necessary to assume an additional

$5 million to $45 million increase in Gross FVL and realized losses. The impact to Net income is partially mitigated because this realized loss is partially offset by the positive quarterly run rate of Life Insurance underwriting income generated by the variable annuity guarantee reinsurance portfolio if markets remain unchanged during the period. Note that both the timing effect and the quarterly run rate of Life Insurance underwriting income change over time as the book ages.


9385


Sensitivities to equity and interest rate movements
(in millions of U.S. dollars)Worldwide Equity Shock
Interest Rate Shock+10 %Flat-10 %-20 %-30 %-40 %
+100 bps(Increase)/decrease in FVL$416 $277 $113 $(81)$(315)$(603)
Increase/(decrease) in hedge value(73)— 73 145 218 290 
Increase/(decrease) in net income$343 $277 $186 $64 $(97)$(313)
Flat(Increase)/decrease in FVL$160 $— $(188)$(408)$(672)$(995)
Increase/(decrease) in hedge value(73)— 73 145 218 290 
Increase/(decrease) in net income$87 $— $(115)$(263)$(454)$(705)
-100 bps(Increase)/decrease in FVL$(111)$(291)$(501)$(749)$(1,050)$(1,412)
Increase/(decrease) in hedge value(73)— 73 145 218 290 
Increase/(decrease) in net income$(184)$(291)$(428)$(604)$(832)$(1,122)
Sensitivities to Other Economic VariablesAA-rated Credit Spreads Interest Rate Volatility Equity Volatility
(in millions of U.S. dollars)+100 bps-100 bps+2 %-2 %+2 %-2 %
(Increase)/decrease in FVL$86 $(97)$— $— $(13)$13 
Increase/(decrease) in net income$86 $(97)$— $— $(13)$13 
Sensitivities to Actuarial AssumptionsMortality
(in millions of U.S. dollars)+20 %+10 %-10 %-20 %
(Increase)/decrease in FVL$24 $12 $(12)$(25)
Increase/(decrease) in net income$24 $12 $(12)$(25)
 Lapses
(in millions of U.S. dollars)+50 %+25 %-25 %-50 %
(Increase)/decrease in FVL$139 $73 $(81)$(170)
Increase/(decrease) in net income$139 $73 $(81)$(170)
 Annuitization
(in millions of U.S. dollars)+50 %+25 %-25 %-50 %
(Increase)/decrease in FVL$(492)$(263)$302 $636 
Increase/(decrease) in net income$(492)$(263)$302 $636 
Sensitivities to equity and interest rate movements           
(in millions of U.S. dollars)Worldwide Equity Shock
Interest Rate Shock+10% Flat
 -10 % -20 % -30 % -40 %
+100 bps(Increase)/decrease in Gross FVL$343
 $207
 $49
 $(138) $(357) $(604)
 Increase/(decrease) in hedge value(63) 
 63
 125
 188
 250
 Increase/(decrease) in net income$280
 $207
 $112
 $(13) $(169) $(354)
Flat(Increase)/decrease in Gross FVL$156
 $
 $(182) $(394) $(636) $(904)
 Increase/(decrease) in hedge value(63) 
 63
 125
 188
 250
 Increase/(decrease) in net income$93
 $
 $(119) $(269) $(448) $(654)
-100 bps(Increase)/decrease in Gross FVL$(74) $(249) $(451) $(681) $(936) $(1,215)
 Increase/(decrease) in hedge value(63) 
 63
 125
 188
 250
 Increase/(decrease) in net income$(137) $(249) $(388) $(556) $(748) $(965)
             
Sensitivities to Other Economic VariablesAA-rated Credit Spreads   Interest Rate Volatility   Equity Volatility 
(in millions of U.S. dollars)+100 bps
 -100 bps
 +2 % -2 % +2 % -2 %
(Increase)/decrease in Gross FVL$73
 $(81) $
 $1
 $(9) $9
Increase/(decrease) in net income$73
 $(81) $
 $1
 $(9) $9
            
Sensitivities to Actuarial Assumptions    Mortality
(in millions of U.S. dollars)    +20 % +10 % -10 % -20 %
(Increase)/decrease in Gross FVL    $18
 $9
 $(9) $(19)
Increase/(decrease) in net income    $18
 $9
 $(9) $(19)
             
      Lapses
(in millions of U.S. dollars)    +50 % +25 % -25 % -50 %
(Increase)/decrease in Gross FVL    $101
 $52
 $(57) $(120)
Increase/(decrease) in net income    $101
 $52
 $(57) $(120)
  ��          
      Annuitization
(in millions of U.S. dollars)    +50 % +25 % -25 % -50 %
(Increase)/decrease in Gross FVL    $(498) $(264) $298
 $585
Increase/(decrease) in net income    $(498) $(264) $298
 $585

Variable Annuity Net Amount at Risk
All our VA reinsurance treaties include annual or aggregate claim limits and many include an aggregate deductible which limit the net amount at risk under these programs. The tables below present the net amount at risk at December 31, 20192020 following an immediate change in equity market levels, assuming all global equity markets are impacted equally. For further information on the net amount at risk, refer to Note 5 c) to the Consolidated Financial Statements.

a) Reinsurance covering the GMDB risk only
 Equity Shock
(in millions of U.S. dollars)+20 %Flat-20 %-40 %-60 %-80 %
GMDB net amount at risk$272 $257 $328 $699 $815 $703 
Claims at 100% immediate mortality157 166 179 166 147 128 
 Equity Shock
(in millions of U.S. dollars)+20% Flat
 -20 % -40 % -60 % -80 %
GMDB net amount at risk$271
 $256
 $442
 $797
 $817
 $696
Claims at 100% immediate mortality160
 167
 166
 156
 138
 122

The treaty claim limits function as a ceiling as equity markets fall. As the shocks in the table above become incrementally more negative, the impact on the NAR and claims at 100 percent mortality begin to drop due to the specific nature of these claim limits, many of which are annual claim limits calculated as a percentage of the reinsured account value. There is also some impact due to a small portion of the GMDB reinsurance under which claims are positively correlated to equity markets (claims decrease as equity markets fall).


86
94



b) Reinsurance covering the GLB risk only
 Equity Shock
(in millions of U.S. dollars)+20 %Flat-20 %-40 %-60 %-80 %
GLB net amount at risk$871 $1,249 $1,811 $2,415 $2,906 $3,266 
 Equity Shock
(in millions of U.S. dollars)+20% Flat
 -20 % -40 % -60 % -80 %
GLB net amount at risk$724
 $1,095
 $1,738
 $2,516
 $3,021
 $3,387

The treaty claim limits cause the net amount at risk to increase at a declining rate as equity markets fall.
c) Reinsurance covering both the GMDB and GLB risks on the same underlying policyholders
Equity Shock Equity Shock
(in millions of U.S. dollars)+20% Flat
 -20 % -40 % -60 % -80 % (in millions of U.S. dollars)+20 %Flat-20 %-40 %-60 %-80 %
GMDB net amount at risk$76
 $91
 $105
 $117
 $123
 $123
GMDB net amount at risk$37 $45 $55 $67 $79 $89 
GLB net amount at risk305
 415
 560
 723
 888
 985
GLB net amount at risk309 409 542 704 873 982 
Claims at 100% immediate mortality16
 16
 17
 17
 17
 17
Claims at 100% immediate mortality36 35 35 35 35 35 
The treaty limits control the increase in the GMDB net amount at risk as equity markets fall. The GMDB net amount at risk continues to growincrease as equity markets fall because most of these reinsurance treaties do not have annual claim limits calculated as a percentage of the underlying account value. The treaty limits cause the GLB net amount at risk to increase at a declining rate as equity markets fall.

ITEM 8. Financial Statements and Supplementary Data

The financial statements and supplementary data are included in this Form 10-K commencing on page F-1.

ITEM 9. Changes in and Disagreements with Accountants on Accounting and Financial Disclosure

None.

ITEM 9A. Controls and Procedures

Chubb’s management, with the participation of Chubb’s Chief Executive Officer and Chief Financial Officer, evaluated the effectiveness of Chubb’s disclosure controls and procedures as defined in Rule 13a-15(e) and Rule 15d-15(e) under the Securities Exchange Act of 1934 as of December 31, 2019.2020. Based upon that evaluation, Chubb’s Chief Executive Officer and Chief Financial Officer concluded that Chubb’s disclosure controls and procedures are effective in allowing information required to be disclosed in reports filed under the Securities Exchange Act of 1934 to be recorded, processed, summarized, and reported within time periods specified in the rules and forms of the SEC, and that such information is accumulated and communicated to Chubb’s management, including its Chief Executive Officer and Chief Financial Officer, as appropriate to allow timely decisions regarding required disclosure.

In 2016, Chubb completed the acquisition of The Chubb Corporation. For the year ended December 31, 2019, we continued to integrate the information technology environments of the two companies.

There werehave been no other changes toin Chubb's internal controls over financial reporting forduring the yearthree months ended December 31, 20192020 that have materially affected, or are reasonably likely to materially affect, Chubb's internal controls over financial reporting. Chubb's management report on internal control over financial reporting is included on page F-3 and PricewaterhouseCoopers LLP's audit report is included on pages F-4, F-5, and F-6.

ITEM 9B. Other Information

Item not applicable.


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ITEM 10. Directors, Executive Officers and Corporate Governance

Information pertaining to this item is incorporated by reference to the sections entitled “Agenda Item 5 - Election of the Board of Directors”, “Corporate Governance - The Board of Directors - Director Nomination Process”, and “Corporate Governance - The Committees of the Board - Audit Committee” of the definitive proxy statement for the 20202021 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A. Also incorporated herein by reference is the text under the caption “Information about our Executive Officers” appearing at the end of Part I Item 1 of the Annual Report on Form 10-K.

Code of Ethics
Chubb has adopted a Code of Conduct, which sets forth standards by which all Chubb employees, officers, and directors must abide as they work for Chubb. Chubb has posted this Code of Conduct on its Internet site (investors.chubb.com, under Corporate Governance/Highlights and Governance Documents/The Chubb Code of Conduct). Chubb intends to disclose on its Internet site any amendments to, or waivers from, its Code of Conduct that are required to be publicly disclosed pursuant to the rules of the SEC or the New York Stock Exchange.

ITEM 11. Executive Compensation

This item is incorporated by reference to the sections entitled “Executive Compensation”, “Compensation Committee Report” and “Director Compensation” of the definitive proxy statement for the 20202021 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A.

ITEM 12. Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters

Plan category Number of securities to be issued upon exercise of outstanding options, warrants, and rights 
Weighted-average exercise price of outstanding options, warrants, and rights (3)
 Number of securities remaining available for future issuance under equity compensation plans
Equity compensation plans approved by security holders (1)
 11,801,420
 $116.79
 12,575,263
Equity compensation plans not approved by security holders (2)
 27,914
    

(1) These totals include securities available for future issuance under the following plans:
(i)This item is incorporated by reference to the sections entitled "Information About Our Share Ownership" and "Agenda Item 9 - Approval of the Chubb Limited 2016 Long-Term Incentive Plan, (LTIP). A totalas Amended and Restated - Explanation - Authorized Securities under Equity Compensation Plans" of 19,500,000 shares are authorized tothe definitive proxy statement for the 2021 Annual General Meeting of Shareholders, which will be issuedfiled with the SEC not later than 120 days after the close of the fiscal year pursuant to awards made as options, stock appreciation rights, stock units, performance shares, performance units, restricted stock, and restricted stock units. The maximum number of shares that may be delivered to participants and their beneficiaries under the LTIP shall be equal to the sum of: (x) 19,500,000 shares of stock; and (y) any shares of stock that have not been delivered pursuant to the ACE LTIP (as defined in clause (ii) of this footnote (1) below) and remain available for grant pursuant to the ACE LTIP, including shares of stock represented by awards granted under the ACE LTIP that are forfeited, expire or are canceled after the effective date of the LTIP without delivery of shares of stock or which result in the forfeiture of the shares of stock back to the Company to the extent that such shares would have been added back to the reserve under the terms of the ACE LTIP. As of December 31, 2019, a total of 5,288,553 option awards and 706,535 restricted stock unit awards are outstanding, and 10,789,285 shares remain available for future issuance under this plan.

(ii) ACE Limited 2004 Long-Term Incentive Plan (ACE LTIP). As of December 31, 2019, a total of 5,496,523 option awards and 72,075 restricted stock unit awards are outstanding. No additional grants will be made pursuant to the ACE LTIP.

(iii) The Chubb Corporation Long-Term Incentive Plan (2014) (Chubb Corp. LTIP). As of December 31, 2019, a total of 99,759 option awards, 3,433 restricted stock unit awards, nil performance unit awards (representing 100% of the aggregate target in accordance with the Chubb Corp. merger agreement) and 83,173 deferred stock unit awards are outstanding. No additional grants will be made pursuant to the Chubb Corp. LTIP.

(iv) ESPP. A total of 6,500,000 shares have been authorized for purchase at a discount. As of December 31, 2019, 1,785,978 shares remain available for future issuance under this plan.



96


Regulation 14A.
(2) These plans are the Chubb Corp. CCAP Excess Benefit Plan (CCAP Excess Benefit Plan) and the Chubb Corp. Deferred Compensation Plan for Directors, under which no Common Shares are available for future issuance other than with respect to outstanding rewards. The CCAP Excess Benefit Plan is a nonqualified, defined contribution plan and covers those participants in the Capital Accumulation Plan of The Chubb Corporation (CCAP) (Chubb Corp.’s legacy 401(k) plan) and Chubb Corp.’s legacy employee stock ownership plan (ESOP) whose total benefits under those plans are limited by certain provisions of the Internal Revenue Code. A participant in the CCAP Excess Benefit Plan is entitled to a benefit equaling the difference between the participant’s benefits under the CCAP and the ESOP, without considering the applicable limitations of the Code, and the participant’s actual benefits under such plans. A participant’s excess ESOP benefit is expressed as Common Shares. Payments under the CCAP Excess Benefit Plan are generally made: (i) for excess benefits related to the CCAP, in cash annually as soon as practical after the amount of excess benefit can be determined; and (ii) for excess benefits related to the ESOP, in Common Shares as soon as practicable after the participant’s termination of employment. Allocations under the ESOP ceased in 2004. Accordingly, other than dividends, no new contributions are made to the ESOP or the CCAP Excess Benefit Plan with respect to excess ESOP benefits.

(3) Weighted average exercise price excludes shares issuable under performance unit awards and restricted stock unit awards.

ITEM 13. Certain Relationships and Related Transactions and Director Independence

This item is incorporated by reference to the sections entitled “Corporate Governance - What Is Our Related Party Transactions Approval Policy And What Procedures Do We Use To Implement It?”, “Corporate Governance - What Related Party Transactions Do We Have?”, and “Corporate Governance - The Board of Directors - Director Independence” of the definitive proxy statement for the 20202021 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A.

ITEM 14. Principal Accounting Fees and Services

This item is incorporated by reference to the section entitled “Agenda Item 4 – Election of Auditors – 4.2 – Ratification of appointment of PricewaterhouseCoopers LLP (United States) as independent registered public accounting firm for purposes of U.S. securities law reporting” of the definitive proxy statement for the 20202021 Annual General Meeting of Shareholders which will be filed with the SEC not later than 120 days after the close of the fiscal year pursuant to Regulation 14A.


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ITEM 15. Exhibits, Financial Statement Schedules

(a)Financial Statements, Schedules, and Exhibits    
Other schedules have been omitted as they are not applicable to Chubb, or the required information has been included in the Consolidated Financial Statements and related notes.
3.Exhibits
      Incorporated by Reference  
Exhibit Number Exhibit Description Form Original Number Date Filed Filed Herewith
  8-K 3.1 May 18, 2018  
           
  8-K 3.1 November 21, 2016  
           
  8-K 4.1 May 18, 2018  
           
  8-K 3.1 November 21, 2016  
           
  8-K 4.3 July 18, 2008  
           
  8-K 4.1 March 22, 2002  
           
  
S-3
ASR
 4.4 December 10, 2014  
           

Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
8-K3.1August 4, 2020
8-K3.1November 21, 2016
8-K4.1August 4, 2020
8-K3.1November 21, 2016
8-K4.3July 18, 2008
8-K4.1March 22, 2002
S-3
ASR
4.4December 10, 2014
10-K10.38March 29, 2000

9889


Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
10-K10.41March 29, 2000
10-K4.17March 16, 2006
10-K4.18March 16, 2006
10-K4.19March 16, 2006
8-K4.1March 13, 2013
8-K4.2March 13, 2013
8-K4.3March 13, 2013
8-K4.1May 27, 2014
8-K4.1March 16, 2015
8-K4.2November 3, 2015
8-K4.3November 3, 2015
8-K4.4November 3, 2015
8-K4.1January 15, 2016
8-K4.2January 15, 2016
4.21Chubb Corp Senior Indenture (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796)S-34(a)October 27, 1989
8-K4.1March 30, 2007
8-K4.2March 30, 2007

      Incorporated by Reference  
Exhibit Number Exhibit Description Form Original Number Date Filed Filed Herewith
  10-K 10.38 March 29, 2000  
           
  10-K 10.41 March 29, 2000  
           
  10-K 4.17 March 16, 2006  
           
  10-K 4.18 March 16, 2006  
           
  10-K 4.19 March 16, 2006  
           
  8-K 4.1 March 13, 2013  
           
  8-K 4.2 March 13, 2013  
           
  8-K 4.3 March 13, 2013  
           
  8-K 4.1 May 27, 2014  
           
  8-K 4.1 March 16, 2015  
           
  8-K 4.1 November 3, 2015  
           
  8-K 4.2 November 3, 2015  
           
  8-K 4.3 November 3, 2015  
           
  8-K 4.4 November 3, 2015  
           
  8-K 4.1 January 15, 2016  
           
  8-K 4.2 January 15, 2016  
           
4.22 Chubb Corp Senior Indenture (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796) S-3 4(a) October 27, 1989  
           
  8-K 4.1 March 30, 2007  
           
90


99


Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
4.24Form of 6.80 percent Chubb Corp Debentures due 2031 (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796)S-34(a)October 27, 1989
8-K4.1May 11, 2007
8-K4.2May 6, 2008
8-K4.3March 30, 2007
10-K4.32February 28, 2017
8-K4.1March 6, 2018
8-K4.2March 6, 2018
8-K4.3March 6, 2018
8-K4.1June 17, 2019
8-K4.2June 17, 2019
8-K4.3June 17, 2019

8-K4.1December 5, 2019

8-K4.2December 5, 2019

8-K4.3December 5, 2019
8-K4.1September 17, 2020
8-K4.2September 17, 2020
X
10-K10.1February 26, 2016

      Incorporated by Reference  
Exhibit Number Exhibit Description Form Original Number Date Filed Filed Herewith
  8-K 4.2 March 30, 2007  
           
  8-K 4.1 May 6, 2008  
           
4.26 Form of 6.60 percent Chubb Corp Debentures due 2018 (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796) S-3 4(a) October 27, 1989  
           
4.27 Form of 6.80 percent Chubb Corp Debentures due 2031 (incorporated by reference to Exhibit 4(a) to Chubb Corp's Registration Statement on Form S-3 filed on October 27, 1989) (File No. 33-31796) S-3 4(a) October 27, 1989  
           
  8-K 4.1 May 11, 2007  
           
  8-K 4.2 May 6, 2008  
           
  8-K 4.3 March 30, 2007  
           
  10-K 4.32 February 28, 2017  
           
  8-K 4.1 March 6, 2018  
           
  8-K 4.2 March 6, 2018  
           
  8-K 4.3 March 6, 2018  
           
  8-K 4.1 June 17, 2019  
           
  8-K 4.2 June 17, 2019  
           
  8-K 4.3 June 17, 2019  
           
 

 8-K 4.1 December 5, 2019  
           
 

 8-K 4.2 December 5, 2019  
           
 

 8-K 4.3 December 5, 2019  
           
91


100


Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
10-K10.13February 28, 2013
10-K10.64March 27, 2003
10-K10.65March 27, 2003
10-Q10.1May 10, 2004
10-K10.17February 25, 2011
10-K10.29February 29, 2008
10-K10.30February 29, 2008
10-K10.21February 24, 2012
8-K10.1July 16, 2008
10-K10.11February 27, 2020
10-K10.24March 16, 2006
10-K10.25March 16, 2006
10-Q10.7October 30, 2013
10-K10.36February 27, 2009
10-K10.28February 25, 2010
10-Q10.2May 7, 2010
10-Q10.1November 14, 2001
10-Q10.6October 30, 2013
10-K10.38February 29, 2008
10-K10.39February 27, 2009

      Incorporated by Reference  
Exhibit Number Exhibit Description Form Original Number Date Filed Filed Herewith
        X
           
  10-K 10.1 February 26, 2016  
           
  10-K 10.13 February 28, 2013  
           
  10-K 10.64 March 27, 2003  
           
  10-K 10.65 March 27, 2003  
           
  10-Q 10.1 May 10, 2004  
           
  10-K 10.17 February 25, 2011  
           
  10-K 10.29 February 29, 2008  
           
  10-K 10.30 February 29, 2008  
           
  10-K 10.21 February 24, 2012  
           
  8-K 10.1 July 16, 2008  
           
        X
           
  10-K 10.24 March 16, 2006  
           
  10-K 10.25 March 16, 2006  
           
  10-Q 10.7 October 30, 2013  
           
  10-K 10.36 February 27, 2009  
           
  10-K 10.28 February 25, 2010  
           
  10-Q 10.2 May 7, 2010  
           
  10-Q 10.1 November 14, 2001  
         
  10-Q 10.6 October 30, 2013  
           
92


101


Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
10-Q10.5October 30, 2013
Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
10-K10.38February 29, 2008
10-K10.39February 27, 2009
10-Q10.5October 30, 2013
10-K10.40February 27, 2009
10-K10.39February 29, 2008
10-K10.42February 27, 2009
10-Q10.6May 15, 2000
10-K10.30March 1, 2007
10-K10.31March 1, 2007
10-K10.46February 27, 2009
10-K10.39February 25, 2010
10-Q10.1August 14, 2003
10-K10.34March 1, 2007
8-K10May 21, 2010
8-K10.1May 20, 2013
10-Q10.2February 13, 1998
10-K10.54February 27, 2009
10-K10.55February 27, 2009
10-Q10.1November 9, 2009
10-Q10.1May 8, 2008


102


Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
10-Q10.2May 8, 2008
10-K10.60February 27, 2009
10-Q10.2October 30, 2013
10-K10.56February 28, 2014
8-K10.4September 13, 2004
10-Q10.4May 8, 2008
10-K10.63February 27, 2009
10-Q10.3October 30, 2013
8-K10.5September 13, 2004
10-Q10.3May 8, 2008
10-Q10.4October 30, 2013
10-Q10.3May 5, 2006
10-Q10.110.2November 9, 2009November 8, 2006
10-K10.65February 25, 2011
10-K10.67February 28, 2014
10-K10.68February 28, 2014
10-Q10.2November 7, 2007
10-Q10.2August 7, 2009


103


      Incorporated by Reference  
Exhibit Number Exhibit Description Form Original Number Date Filed Filed Herewith
  10-Q 10.1 August 4, 2011  
           
  10-Q 10.2 August 4, 2011  
           
  10-Q 10.3 August 4, 2011  
           
  8-K 10.1 May 22, 2012  
           
  10-K 10.72 February 24, 2012  
           
  10-K 10.68 February 27, 2015  
           
  10-K 10.69 February 27, 2015  
           
  10-K 10.70 February 27, 2015  
           
  10-K 10.71 February 27, 2015  
           
  10-K 10.72 February 27, 2015  
           
  8-K 10.1 May 22, 2015  
           
  10-K 10.72 February 26, 2016  
           
  10-K 10.73 February 26, 2016  
           
  10-K 10.74 February 26, 2016  
           
  S-8 4.4 May 26, 2016  
           
  10-Q 10.2 August 5, 2016  
           
  10-Q 10.3 August 5, 2016  
           


104


      Incorporated by Reference  
Exhibit Number Exhibit Description Form Original Number Date Filed Filed Herewith
  10-Q 10.4 August 5, 2016  
           
  10-Q 10.5 August 5, 2016  
           
  10-Q 10.6 August 5, 2016  
           
  10-Q 10.7 August 5, 2016  
           
  10-Q 10.8 August 5, 2016  
           
  10-Q 10.9 August 5, 2016  
           
  10-K 10.84 February 28, 2017  
           
  10-K 10.85 February 28, 2017  
           
  S-8 4.4 May 25, 2017  
           
  10-Q 10.1 August 3, 2017  
           
  10-K 10.88 February 23, 2018  
           
  10-K 10.89 February 23, 2018  
           
  10-K 10.90 February 23, 2018  
           
  10-K 10.91 February 23, 2018  
           
  10-K 10.92 February 23, 2018  
           
  10-K 10.93 February 23, 2018  
           
  10-K 10.94 February 23, 2018  
           
  10-K 10.95 February 23, 2018  
           


105



93

Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
10-Q10.4October 30, 2013
10-Q10.2November 7, 2007
10-Q10.2August 7, 2009
10-Q10.1August 4, 2011
10-Q10.2August 4, 2011
8-K10.1May 22, 2012
10-K10.71February 27, 2015
10-K10.72February 27, 2015
8-K10.1May 22, 2015
10-K10.72February 26, 2016
S-84.4May 26, 2016
10-Q10.2August 5, 2016
10-Q10.3August 5, 2016
10-Q10.4August 5, 2016
10-Q10.5August 5, 2016
10-Q10.6August 5, 2016
10-Q10.7August 5, 2016
10-Q10.8August 5, 2016

94

Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
10-Q10.9August 5, 2016
S-84.4May 25, 2017
10-Q10.1August 3, 2017
10-K10.88February 23, 2018
10-K10.89February 23, 2018
10-K10.90February 23, 2018
10-K10.92February 23, 2018
10-K10.93February 23, 2018
10-K10.94February 23, 2018
10-K10.95February 23, 2018
10-K10.96February 23, 2018
10-K10.97February 23, 2018
10-K10.99February 23, 2018
8-K10.9March 9, 2005
8-K10.1September 12, 2005
10-K10.20March 2, 2009
10-K10.32February 28, 2013
X
X
X

95

Incorporated by Reference
Exhibit NumberExhibit DescriptionFormOriginal NumberDate FiledFiled Herewith
X
X
10-K10.98February 23, 2018X
10-K10.99February 23, 2018X
X
X
X
X
X
X
X
101The following financial information from Chubb Limited's Annual Report on Form 10-K for the year ended December 31, 2019,2020, formatted in Inline XBRL: (i)  Consolidated Balance Sheets at December 31, 20192020 and 2018;2019; (ii) Consolidated Statements of Operations and Comprehensive Income for the years ended December 31, 2020, 2019, 2018, and 2017;2018; (iii) Consolidated Statements of Shareholders' Equity for the years ended December 31, 2020, 2019, 2018, and 2017;2018; (iv) Consolidated Statements of Cash Flows for the years ended December 31, 2020, 2019, 2018, and 2017;2018; and (v) Notes to the Consolidated Financial StatementsX
104The Cover Page Interactive Data File formatted in Inline XBRL (The cover page XBRL tags are embedded in the Inline XBRL document and included in Exhibit 101)
* Management contract, compensatory plan or arrangement
ITEM 16. Form 10-K Summary

None.



10696


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.

CHUBB LIMITED

By:/s/ Philip V. Bancroft
Philip V. Bancroft
Executive Vice President and Chief Financial Officer

February 27, 202025, 2021

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.

SignatureTitleDate
/s/ Evan G. GreenbergChairman, Chief Executive Officer, and DirectorFebruary 25, 2021
Evan G. Greenberg
SignatureTitleDate
/s/ Evan G. GreenbergChairman, President, Chief Executive Officer, and DirectorFebruary 27, 2020
Evan G. Greenberg
/s/ Philip V. BancroftExecutive Vice President and Chief Financial OfficerFebruary 27, 202025, 2021
Philip V. Bancroft(Principal Financial Officer)
/s/ Paul B. MediniChief Accounting OfficerFebruary 27, 2020
Paul B. Medini(Principal Accounting Officer)
/s/ Michael G. AtiehDirectorFebruary 27, 2020
Michael G. Atieh
/s/ Sheila P. BurkeDirectorFebruary 27, 2020
Sheila P. Burke
/s/ James I. CashDirectorFebruary 27, 2020
James I. Cash
/s/ Mary A. CirilloDirectorFebruary 27, 2020
Mary A. Cirillo
/s/ Michael P. ConnorsDirectorFebruary 27, 2020
Michael P. Connors




107


Signature/s/ Annmarie T. HaganTitleChief Accounting OfficerDateFebruary 25, 2021
Annmarie T. Hagan(Principal Accounting Officer)
/s/ Michael G. AtiehDirectorFebruary 25, 2021
Michael G. Atieh
/s/ Sheila P. BurkeDirectorFebruary 25, 2021
Sheila P. Burke
/s/ James I. CashDirectorFebruary 25, 2021
James I. Cash
/s/ Mary A. CirilloDirectorFebruary 25, 2021
Mary A. Cirillo
/s/ Michael P. ConnorsDirectorFebruary 25, 2021
Michael P. Connors

97

SignatureTitleDate
/s/ John A. EdwardsonDirectorFebruary 27, 202025, 2021
John A. Edwardson
/s/ Robert M. HernandezJ. HuginDirectorFebruary 27, 202025, 2021
Robert M. HernandezJ. Hugin
/s/ Kimberly RossDirectorFebruary 27, 2020
Kimberly Ross
/s/ Robert W. ScullyDirectorFebruary 27, 202025, 2021
Robert W. Scully
/s/ Eugene B. Shanks, Jr.DirectorFebruary 27, 202025, 2021
Eugene B. Shanks, Jr.
/s/ Theodore E. ShastaDirectorFebruary 27, 202025, 2021
Theodore E. Shasta
/s/ David H. SidwellDirectorFebruary 27, 202025, 2021
David H. Sidwell
/s/ Olivier SteimerDirectorFebruary 27, 202025, 2021
Olivier Steimer
/s/ Frances F. TownsendDirectorFebruary 25, 2021
Frances F. Townsend


98
108


CHUBB LIMITED AND SUBSIDIARIES
CONSOLIDATED FINANCIAL STATEMENTS
December 31, 20192020





F-1


Chubb Limited
INDEX TO CONSOLIDATED FINANCIAL STATEMENTS


Page
Consolidated Financial Statements
Note 1.
Note 2.
Note 3.
Note 4.
Note 5.
Note 6.
Note 7.
Note 8.
Note 9.
Note 10.
Note 11.
Note 12.
Note 13.
Note 14.
Note 15.
Note 16.
Note 17.
Note 18.
Note 19.
Note 20.
Financial Statement Schedules
Schedule I
Schedule II
Schedule IV
Schedule VI



F-2


MANAGEMENT'S RESPONSIBILITY FOR FINANCIAL STATEMENTS AND
INTERNAL CONTROL OVER FINANCIAL REPORTING

Financial Statements
The consolidated financial statements of Chubb Limited (Chubb) were prepared by management, which is responsible for their reliability and objectivity. The statements have been prepared in conformity with accounting principles generally accepted in the United States of America and, as such, include amounts based on informed estimates and judgments of management. Financial information elsewhere in this annual report is consistent with that in the consolidated financial statements.

The Board of Directors (Board), operating through its Audit Committee, which is composed entirely of directors who are not officers or employees of Chubb, provides oversight of the financial reporting process and safeguarding of assets against unauthorized acquisition, use or disposition. The Audit Committee annually recommends the appointment of an independent registered public accounting firm and submits its recommendation to the Board for approval.

The Audit Committee meets with management, the independent registered public accountants and the internal auditor; approves the overall scope of audit work and related fee arrangements; and reviews audit reports and findings. In addition, the independent registered public accountants and the internal auditor meet separately with the Audit Committee, without management representatives present, to discuss the results of their audits; the adequacy of Chubb's internal control; the quality of its financial reporting; and the safeguarding of assets against unauthorized acquisition, use or disposition.

The consolidated financial statements have been audited by an independent registered public accounting firm, PricewaterhouseCoopers LLP, which has been given access to all financial records and related data, including minutes of all meetings of the Board and committees of the Board. Chubb believes that all representations made to our independent registered public accountants during their audits were valid and appropriate.
Management's Report on Internal Control over Financial Reporting
The management of Chubb is responsible for establishing and maintaining adequate internal control over financial reporting. Pursuant to the rules and regulations of the Securities and Exchange Commission, internal control over financial reporting is a process designed by, or under the supervision of our Chief Executive Officer and Chief Financial Officer to provide reasonable assurance regarding the reliability of financial reporting and the preparation of our consolidated financial statements for external purposes in accordance with accounting principles generally accepted in the United States of America.

As of December 31, 2019,2020, management has evaluated the effectiveness of Chubb's internal control over financial reporting based on the criteria for effective internal control over financial reporting established in “Internal Control - Integrated Framework,” issued by the Committee of Sponsoring Organizations of the Treadway Commission in 2013. Based on this evaluation, we have concluded that Chubb's internal control over financial reporting was effective as of December 31, 2019.2020.

PricewaterhouseCoopers LLP, the independent registered public accounting firm that audited the consolidated financial statements of Chubb included in this Annual Report, has issued a report on the effectiveness of Chubb's internal controls over financial reporting as of December 31, 2019.2020. The report, which expresses an unqualified opinion on the effectiveness of Chubb's internal control over financial reporting as of December 31, 2019,2020, is included in this Item under “Report of Independent Registered Public Accounting Firm” and follows this statement.

/s/ Evan G. Greenberg/s/ Philip V. Bancroft
Evan G. GreenbergPhilip V. Bancroft
Chairman President and Chief Executive OfficerExecutive Vice President and Chief Financial Officer
                                            


F-3


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


To the Board of Directors and Shareholders of Chubb Limited

Opinions on the Financial Statements and Internal Control over Financial Reporting

We have audited the accompanying consolidated balance sheets of Chubb Limited and its subsidiaries (the "Company") as of December 31, 20192020 and 2018,2019, and the related consolidated statements of operations and comprehensive income, of shareholders' equity and of cash flows for each of the three years in the period ended December 31, 2019,2020, including the related notes and financial statement schedules listed in the index appearing under Item 15(a)(2) (collectively referred to as the “consolidated financial statements”). We also have audited the Company's internal control over financial reporting as of December 31, 2019,2020, based on criteria established in Internal Control - Integrated Framework (2013) issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO).

In our opinion, the consolidated financial statements referred to above present fairly, in all material respects, the financial position of the Company as of December 31, 20192020 and 2018,2019, and the results of its operations and its cash flows for each of the three years in the period ended December 31, 20192020 in conformity with accounting principles generally accepted in the United States of America. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2019,2020, based on criteria established in Internal Control - Integrated Framework (2013) issued by the COSO.

Basis for Opinions

The Company's management is responsible for these consolidated financial statements, 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 Report on Internal Control over Financial Reporting. Our responsibility is to express opinions on the Company’s consolidated financial statements and on the Company's internal control over financial reporting based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (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 audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement, whether due to error or fraud, and whether effective internal control over financial reporting was maintained in all material respects.

Our audits of the consolidated financial statements included performing procedures to assess the risks of material misstatement of the consolidated 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 consolidated 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 consolidated financial statements. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

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 (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) 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 (iii) 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.


F-4
F-4


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


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.
Critical Audit Matters
The critical audit matters communicated below are matters arising from the current period audit of the consolidated financial statements that were communicated or required to be communicated to the audit committee and that (i) relate to accounts or disclosures that are material to the consolidated financial statements and (ii) involved our especially challenging, subjective, or complex judgments. The communication of critical audit matters 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 matters below, providing separate opinions on the critical audit matters or on the accounts or disclosures to which they relate.

Valuation of Unpaid Losses and Loss Expenses, Net of Reinsurance

As described in Note 7 to the consolidated financial statements, as of December 31, 2019,2020, the Company’s liability for unpaid losses and loss expenses, net of reinsurance, was approximately $48.5$53 billion. The majority of the Company’s net unpaid losses and loss expenses arise from the Company’s long-tail casualty business (such as general liability and professional liability), U.S. sourced workers’ compensation, asbestos-related, environmental pollution and other exposures with high estimation uncertainty. The process of establishing loss reserves requires the use of estimates and judgments based on circumstances underlying the insured loss at the date of accrual. The judgments involved in projecting the ultimate losses include the use and interpretation of various standard actuarial reserving methods that place reliance on the extrapolation of actual historical data, loss development patterns, industry data, and other benchmarks as appropriate. The reserves for the various product lines each require different qualitative and quantitative assumptions and judgments, including changes in business mix or volume, changes in ceded reinsurance structures, changes in claims handling practices, reported and projected loss trends, inflation, the legal environment, and the terms and conditions of the contracts sold to the Company’s insured parties.  

The principal considerations for our determination that performing procedures relating to the valuation of unpaid losses and loss expenses, net of reinsurance, from the long-tail and other exposures as described above, is a critical audit matter are (i) there wasthe significant judgment by management in determining the reserve liability, which in turn led to a high degree of auditor subjectivity and judgment in performing procedures relating to the valuation; (ii) there wasthe significant auditoraudit effort and judgment in evaluating the audit evidence relating to the actuarial reserving methods and assumptions related to extrapolation of actual historical data, loss development patterns, industry data, other benchmarks, and the impact of qualitative and quantitative subjective factors; and (iii) the audit effort included the involvement of professionals with specialized skill and knowledge to assist in performing these procedures and evaluating the audit evidence obtained.  

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of controls relating to the Company’s valuation of unpaid losses and loss expenses, net of reinsurance, including controls over the selection of actuarial methodologies and development of significant assumptions. These procedures also included, among others, the involvement of professionals with specialized skill and knowledge to assist in performing one or a combination of procedures, including (i) independently estimating reserves on a sample basis using actual historical data and loss development patterns, as well as industry data and other benchmarks, to develop an independent estimate and comparing the independent estimate to management’s actuarially determined reserves; and (ii) evaluating management’s actuarial reserving methodologies and aforementioned assumptions, as well as assessing qualitative adjustments to carried reserves and the consistency of management’s approach period-over-period. Performing these procedures involved testing the completeness and accuracy of data provided by management.

Valuation of Level 3 Investments in the Valuation Hierarchy

As described in Note 4 to the consolidated financial statements, as of December 31, 2019,2020, the Company had total assets measured at fair value of approximately $96$106 billion, of which approximately $2 billion were categorized as level 3 in the valuation hierarchy.  The level 3 investments are measured at fair value using inputs that are unobservable and reflect management’s judgments about assumptions that market participants would use in pricing or, for certain of the investments, management obtains and evaluates a single broker quote, which is typically from a market maker. As described by management, the valuation is more subjective when markets are less liquid due to the lack of market based inputs (i.e., stale pricing), which may increase the potential that an investment's estimated fair value is not reflective of the price at which an actual transaction would occur.  


F-5


REPORT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


actual transaction would occur.  

The principal considerations for our determination that performing procedures relating to the valuation of level 3 investments in the valuation hierarchy is a critical audit matter are (i) there wasthe significant judgment by management in determining the fair value of these investments as they are measured using inputs that are unobservable and are likely to be priced using models or inputs other than quoted prices, which in turn led to a high degree of auditor subjectivity and judgment in performing procedures relating to the estimate; and (ii) the audit effort included the involvement of professionals with specialized skill and knowledge to assist in performing these procedures and evaluating the audit evidence obtained.  

Addressing the matter involved performing procedures and evaluating audit evidence in connection with forming our overall opinion on the consolidated financial statements. These procedures included testing the effectiveness of the controls relating to the valuation of level 3 investments. These procedures also included, among others, obtaining pricing from sources other than those used by management for a sample of securities and comparing management’s estimate to the prices independently obtained, and the involvement of professionals with specialized skill and knowledge to assist in developing an independent range of estimatesprices for a sample of securities and comparing management’s estimate to the independently developed ranges.


/s/ PricewaterhouseCoopers LLP
PricewaterhouseCoopers LLP
Philadelphia, PA
February 27, 202025, 2021

We have served as the Company’s auditor since 1985, which includes periods before the Company became subject to SEC reporting requirements.



F-6


CONSOLIDATED BALANCE SHEETS
Chubb Limited and Subsidiaries

 December 31
 December 31
December 31December 31
(in millions of U.S. dollars, except share and per share data)(in millions of U.S. dollars, except share and per share data)2019
 2018
(in millions of U.S. dollars, except share and per share data)20202019
AssetsAssets   Assets
InvestmentsInvestments   Investments
Fixed maturities available for sale, at fair value (amortized cost – $82,580 and $79,323)$85,488
 $78,470
Fixed maturities available for sale, at fair value, net of valuation allowance - $20 at December 31, 2020 (amortized cost – $85,188 and $82,580)$90,699 $85,488 
Fixed maturities held to maturity, at amortized cost (fair value – $13,005 and $13,259)12,581
 13,435
Fixed maturities held to maturity, at amortized cost, net of valuation allowance - $44 at December 31, 2020 (fair value – $12,510 and $13,005)11,653 12,581 
Equity securities, at fair value812
 770
Equity securities, at fair value4,027 812 
Short-term investments, at fair value and amortized cost4,291
 3,016
Short-term investments, at fair value (amortized cost - $4,349 and $4,291)4,345 4,291 
Other investments, at fair value6,062
 5,277
Other investments, at fair value7,945 6,062 
 Total investments109,234
 100,968
Total investments118,669 109,234 
CashCash1,537
 1,247
Cash1,747 1,537 
Restricted cashRestricted cash109
 93
Restricted cash89 109 
Securities lending collateralSecurities lending collateral994
 1,926
Securities lending collateral1,844 994 
Accrued investment incomeAccrued investment income867
 883
Accrued investment income867 867 
Insurance and reinsurance balances receivable10,357
 10,075
Reinsurance recoverable on losses and loss expenses15,181
 15,993
Insurance and reinsurance balances receivable, net of valuation allowance - $44 and $44
Insurance and reinsurance balances receivable, net of valuation allowance - $44 and $44
10,480 10,357 
Reinsurance recoverable on losses and loss expenses, net of valuation allowance - $314 and $316
Reinsurance recoverable on losses and loss expenses, net of valuation allowance - $314 and $316
15,592 15,181 
Reinsurance recoverable on policy benefitsReinsurance recoverable on policy benefits197
 202
Reinsurance recoverable on policy benefits206 197 
Deferred policy acquisition costsDeferred policy acquisition costs5,242
 4,922
Deferred policy acquisition costs5,402 5,242 
Value of business acquiredValue of business acquired306
 295
Value of business acquired263 306 
GoodwillGoodwill15,296
 15,271
Goodwill15,400 15,296 
Other intangible assetsOther intangible assets6,063
 6,143
Other intangible assets5,811 6,063 
Prepaid reinsurance premiumsPrepaid reinsurance premiums2,647
 2,544
Prepaid reinsurance premiums2,769 2,647 
Investments in partially-owned insurance companiesInvestments in partially-owned insurance companies1,332
 678
Investments in partially-owned insurance companies2,813 1,332 
Other assetsOther assets7,581
 6,531
Other assets8,822 7,581 
Total assetsTotal assets$176,943
 $167,771
Total assets$190,774 $176,943 
LiabilitiesLiabilities   Liabilities
Unpaid losses and loss expensesUnpaid losses and loss expenses$62,690
 $62,960
Unpaid losses and loss expenses$67,811 $62,690 
Unearned premiumsUnearned premiums16,771
 15,532
Unearned premiums17,652 16,771 
Future policy benefitsFuture policy benefits5,814
 5,506
Future policy benefits5,713 5,373 
Insurance and reinsurance balances payableInsurance and reinsurance balances payable6,184
 6,437
Insurance and reinsurance balances payable6,708 6,184 
Securities lending payableSecurities lending payable994
 1,926
Securities lending payable1,844 994 
Accounts payable, accrued expenses, and other liabilitiesAccounts payable, accrued expenses, and other liabilities11,773
 10,472
Accounts payable, accrued expenses, and other liabilities14,052 12,214 
Deferred tax liabilitiesDeferred tax liabilities804
 304
Deferred tax liabilities892 804 
Repurchase agreementsRepurchase agreements1,416
 1,418
Repurchase agreements1,405 1,416 
Short-term debtShort-term debt1,299
 509
Short-term debt0 1,299 
Long-term debtLong-term debt13,559
 12,087
Long-term debt14,948 13,559 
Trust preferred securitiesTrust preferred securities308
 308
Trust preferred securities308 308 
Total liabilitiesTotal liabilities121,612
 117,459
Total liabilities131,333 121,612 
Commitments and contingencies (refer to Note 10)Commitments and contingencies (refer to Note 10)

 

Commitments and contingencies (refer to Note 10)00
Shareholders’ equityShareholders’ equity   Shareholders’ equity
Common Shares (CHF 24.15 par value; 479,783,864 shares issued; 451,971,567 and 459,203,378 shares outstanding)
11,121
 11,121
Common Shares in treasury (27,812,297 and 20,580,486 shares)
(3,754) (2,618)
Common Shares (CHF 24.15 par value; 477,605,264 and 479,783,864 shares issued; 450,732,625 and 451,971,567 shares outstanding)
Common Shares (CHF 24.15 par value; 477,605,264 and 479,783,864 shares issued; 450,732,625 and 451,971,567 shares outstanding)
11,064 11,121 
Common Shares in treasury (26,872,639 and 27,812,297 shares)
Common Shares in treasury (26,872,639 and 27,812,297 shares)
(3,644)(3,754)
Additional paid-in capitalAdditional paid-in capital11,203
 12,557
Additional paid-in capital9,815 11,203 
Retained earningsRetained earnings36,142
 31,700
Retained earnings39,337 36,142 
Accumulated other comprehensive income (loss) (AOCI)619
 (2,448)
Accumulated other comprehensive income (AOCI)Accumulated other comprehensive income (AOCI)2,869 619 
Total shareholders’ equityTotal shareholders’ equity55,331
 50,312
Total shareholders’ equity59,441 55,331 
Total liabilities and shareholders’ equityTotal liabilities and shareholders’ equity$176,943
 $167,771
Total liabilities and shareholders’ equity$190,774 $176,943 
See accompanying notes to the consolidated financial statements

Consolidated Financial Statements

F-7


CONSOLIDATED STATEMENTS OF OPERATIONS AND COMPREHENSIVE INCOME
Chubb Limited and Subsidiaries

For the years ended December 31, 2019, 2018, and 2017 
For the years ended December 31, 2020, 2019, and 2018For the years ended December 31, 2020, 2019, and 2018
(in millions of U.S. dollars, except per share data)2019
 2018
 2017
(in millions of U.S. dollars, except per share data)202020192018
Revenues     Revenues
Net premiums written$32,275
 $30,579
 $29,244
Net premiums written$33,820 $32,275 $30,579 
Increase in unearned premiums(985) (515) (210)Increase in unearned premiums(703)(985)(515)
Net premiums earned31,290
 30,064
 29,034
Net premiums earned33,117 31,290 30,064 
Net investment income3,426
 3,305
 3,125
Net investment income3,375 3,426 3,305 
Net realized gains (losses):     Net realized gains (losses):
Other-than-temporary impairment (OTTI) losses gross(90) (52) (46)Other-than-temporary impairment (OTTI) losses gross (90)(52)
Portion of OTTI losses recognized in other comprehensive income (OCI)32
 3
 1
Portion of OTTI losses recognized in other comprehensive income (OCI)0 32 
Net OTTI losses recognized in income(58) (49) (45)Net OTTI losses recognized in income (58)(49)
Net realized gains (losses) excluding OTTI losses(472) (603) 129
Net realized gains (losses) excluding OTTI losses(498)(472)(603)
Total net realized gains (losses) (includes $(31), $(302), and $(15) reclassified from AOCI)
(530) (652) 84
Total net realized gains (losses) (includes $(281), $(31), and $(302) reclassified from AOCI)Total net realized gains (losses) (includes $(281), $(31), and $(302) reclassified from AOCI)(498)(530)(652)
Total revenues34,186
 32,717
 32,243
Total revenues35,994 34,186 32,717 
Expenses     Expenses
Losses and loss expenses18,730
 18,067
 18,454
Losses and loss expenses21,710 18,730 18,067 
Policy benefits740
 590
 676
Policy benefits784 740 590 
Policy acquisition costs6,153
 5,912
 5,781
Policy acquisition costs6,547 6,153 5,912 
Administrative expenses3,030
 2,886
 2,833
Administrative expenses2,979 3,030 2,886 
Interest expense552
 641
 607
Interest expense516 552 641 
Other (income) expense(596) (434) (400)Other (income) expense(994)(596)(434)
Amortization of purchased intangibles305
 339
 260
Amortization of purchased intangibles290 305 339 
Chubb integration expenses23
 59
 310
Chubb integration expenses0 23 59 
Total expenses28,937
 28,060
 28,521
Total expenses31,832 28,937 28,060 
Income before income tax5,249
 4,657
 3,722
Income before income tax4,162 5,249 4,657 
Income tax expense (benefit) (includes nil, $(41), and $(13) on reclassified unrealized gains and losses)795
 695
 (139)
Income tax expense (includes benefit of $(36), NaN, and $(41) on unrealized gains and losses reclassified from AOCI)Income tax expense (includes benefit of $(36), NaN, and $(41) on unrealized gains and losses reclassified from AOCI)629 795 695 
Net income$4,454
 $3,962
 $3,861
Net income$3,533 $4,454 $3,962 
Other comprehensive income (loss)     Other comprehensive income (loss)
Unrealized appreciation (depreciation)$3,704
 $(2,298) $618
Unrealized appreciation (depreciation)$2,311 $3,704 $(2,298)
Reclassification adjustment for net realized (gains) losses included in net income31
 302
 15
Reclassification adjustment for net realized (gains) losses included in net income281 31 302 
3,735
 (1,996) 633
2,592 3,735 (1,996)
Change in:     Change in:
Cumulative foreign currency translation adjustment13
 (802) 471
Cumulative foreign currency translation adjustment306 13 (802)
Postretirement benefit liability adjustment(76) (321) (16)Postretirement benefit liability adjustment(232)(76)(321)
Other comprehensive income (loss), before income tax3,672
 (3,119) 1,088
Other comprehensive income (loss), before income tax2,666 3,672 (3,119)
Income tax (expense) benefit related to OCI items(605) 399
 (231)Income tax (expense) benefit related to OCI items(416)(605)399 
Other comprehensive income (loss)3,067
 (2,720) 857
Other comprehensive income (loss)2,250 3,067 (2,720)
Comprehensive income$7,521
 $1,242
 $4,718
Comprehensive income$5,783 $7,521 $1,242 
Earnings per share     Earnings per share
Basic earnings per share$9.77
 $8.55
 $8.26
Basic earnings per share$7.82 $9.77 $8.55 
Diluted earnings per share$9.71
 $8.49
 $8.19
Diluted earnings per share$7.79 $9.71 $8.49 
See accompanying notes to the consolidated financial statements

Consolidated Financial Statements

F-8


CONSOLIDATED STATEMENTS OF SHAREHOLDERS’ EQUITY
Chubb Limited and Subsidiaries

For the years ended December 31, 2020, 2019, and 2018
(in millions of U.S. dollars)202020192018
Common Shares
Balance – beginning of year$11,121 $11,121 $11,121 
Cancellation of treasury shares(57)
Balance – end of year11,064 11,121 11,121 
Common Shares in treasury
Balance – beginning of year(3,754)(2,618)(1,944)
Common Shares repurchased(516)(1,531)(1,021)
Cancellation of treasury shares323 
Net shares issued under employee share-based compensation plans303 395 347 
Balance – end of year(3,644)(3,754)(2,618)
Additional paid-in capital
Balance – beginning of year11,203 12,557 13,978 
Net shares issued under employee share-based compensation plans(195)(178)(313)
Exercise of stock options(50)(82)(49)
Share-based compensation expense255 266 285 
Funding of dividends declared to Retained earnings(1,398)(1,360)(1,344)
Balance – end of year9,815 11,203 12,557 
Retained earnings
Balance – beginning of year36,142 31,700 27,474 
Cumulative effect of adoption of accounting standards (refer to Note 1)
(72)(12)264 
Balance – beginning of year, as adjusted36,070 31,688 27,738 
Net income3,533 4,454 3,962 
Cancellation of treasury shares(266)
Funding of dividends declared from Additional paid-in capital1,398 1,360 1,344 
Dividends declared on Common Shares(1,398)(1,360)(1,344)
Balance – end of year39,337 36,142 31,700 
Accumulated other comprehensive income (loss)
Net unrealized appreciation (depreciation) on investments
Balance – beginning of year2,543 (545)1,450 
Cumulative effect of adoption of accounting standards0 (296)
Balance – beginning of year, as adjusted2,543 (545)1,154 
Change in year, before reclassification from AOCI, net of income tax (expense) benefit of $(426), $(647), and $3381,885 3,057 (1,960)
Amounts reclassified from AOCI, net of income tax (expense) of $(36), NaN, and $(41)245 31 261 
Change in year, net of income tax (expense) benefit of $(462), $(647), and $2972,130 3,088 (1,699)
Balance – end of year4,673 2,543 (545)
Cumulative foreign currency translation adjustment
Balance – beginning of year(1,939)(1,976)(1,187)
Cumulative effect of adoption of accounting standards — (22)
Balance – beginning of year, as adjusted(1,939)(1,976)(1,209)
Change in year, net of income tax (expense) benefit of $(4), $24, and $35302 37 (767)
Balance – end of year(1,637)(1,939)(1,976)
Postretirement benefit liability adjustment
Balance – beginning of year15 73 280 
Cumulative effect of adoption of accounting standards0 47 
Balance – beginning of year, as adjusted15 73 327 
Change in year, net of income tax benefit of $50, $18, and $67(182)(58)(254)
Balance – end of year(167)15 73 
Accumulated other comprehensive income (loss)2,869 619 (2,448)
Total shareholders’ equity$59,441 $55,331 $50,312 
For the years ended December 31, 2019, 2018, and 2017 
(in millions of U.S. dollars)2019
 2018
 2017
Common Shares     
Balance – beginning and end of year$11,121
 $11,121
 $11,121
Common Shares in treasury     
Balance – beginning of year(2,618) (1,944) (1,480)
Common Shares repurchased(1,531) (1,021) (830)
Net shares issued under employee share-based compensation plans395
 347
 366
Balance – end of year(3,754) (2,618) (1,944)
Additional paid-in capital     
Balance – beginning of year12,557
 13,978
 15,335
Net shares issued under employee share-based compensation plans(178) (313) (313)
Exercise of stock options(82) (49) (58)
Share-based compensation expense266
 285
 331
Funding of dividends declared to Retained earnings(1,360) (1,344) (1,317)
Balance – end of year11,203
 12,557
 13,978
Retained earnings     
Balance – beginning of year31,700
 27,474
 23,613
Cumulative effect of adoption of accounting standards (refer to Note 1)(12) 264
 
Balance – beginning of year, as adjusted31,688
 27,738
 23,613
Net income4,454
 3,962
 3,861
Funding of dividends declared from Additional paid-in capital1,360
 1,344
 1,317
Dividends declared on Common Shares(1,360) (1,344) (1,317)
Balance – end of year36,142
 31,700
 27,474
Accumulated other comprehensive income (loss)     
Net unrealized appreciation (depreciation) on investments     
Balance – beginning of year(545) 1,450
 1,058
Cumulative effect of adoption of accounting standards
 (296) 
Balance – beginning of year, as adjusted(545) 1,154
 1,058
Change in year, before reclassification from AOCI, net of income tax (expense) benefit of $(647), $338, and $(228)3,057
 (1,960) 390
Amounts reclassified from AOCI, net of income tax (expense) benefit of nil, $(41), and $(13)31
 261
 2
Change in year, net of income tax (expense) benefit of $(647), $297, and $(241)3,088
 (1,699) 392
Balance – end of year2,543
 (545) 1,450
Cumulative foreign currency translation adjustment     
Balance – beginning of year(1,976) (1,187) (1,663)
Cumulative effect of adoption of accounting standards 

 (22) 
Balance – beginning of year, as adjusted(1,976) (1,209) (1,663)
Change in year, net of income tax benefit of $24, $35, and $537
 (767) 476
Balance – end of year(1,939) (1,976) (1,187)
Postretirement benefit liability adjustment     
Balance – beginning of year73
 280
 291
Cumulative effect of adoption of accounting standards
 47
 
Balance – beginning of year, as adjusted73
 327
 291
Change in year, net of income tax benefit of $18, $67, and $5(58) (254) (11)
Balance – end of year15
 73
 280
Accumulated other comprehensive income (loss)619
 (2,448) 543
Total shareholders’ equity$55,331
 $50,312
 $51,172
See accompanying notes to the consolidated financial statements

Consolidated Financial Statements

F-9


CONSOLIDATED STATEMENTS OF CASH FLOWS
Chubb Limited and Subsidiaries

For the years ended December 31, 2019, 2018, and 2017 
For the years ended December 31, 2020, 2019, and 2018For the years ended December 31, 2020, 2019, and 2018
(in millions of U.S. dollars)2019
 2018
 2017
(in millions of U.S. dollars)202020192018
Cash flows from operating activities     Cash flows from operating activities
Net income$4,454
 $3,962
 $3,861
Net income$3,533 $4,454 $3,962 
Adjustments to reconcile net income to net cash flows from operating activities    
Adjustments to reconcile net income to net cash flows from operating activities
Net realized (gains) losses530
 652
 (84)Net realized (gains) losses498 530 652 
Amortization of premiums/discounts on fixed maturities395
 592
 694
Amortization of premiums/discounts on fixed maturities367 395 592 
Amortization of purchased intangibles305
 339
 260
Amortization of purchased intangibles290 305 339 
Deferred income taxes(97) 16
 (527)Deferred income taxes(333)(97)16 
Unpaid losses and loss expenses(257) 570
 2,137
Unpaid losses and loss expenses4,664 (257)570 
Unearned premiums1,051
 654
 264
Unearned premiums846 1,051 654 
Future policy benefits215
 235
 217
Future policy benefits236 215 235 
Insurance and reinsurance balances payable(302) 722
 271
Insurance and reinsurance balances payable535 (302)722 
Accounts payable, accrued expenses, and other liabilities(207) 375
 (517)Accounts payable, accrued expenses, and other liabilities(98)(207)375 
Income taxes payable(7) 161
 (365)Income taxes payable46 (7)161 
Insurance and reinsurance balances receivable(270) (981) (243)Insurance and reinsurance balances receivable(114)(270)(981)
Reinsurance recoverable838
 (1,165) (1,248)Reinsurance recoverable(336)838 (1,165)
Deferred policy acquisition costs(344) (301) (317)Deferred policy acquisition costs(89)(344)(301)
Other38
 (351) 100
Other(260)38 (351)
Net cash flows from operating activities6,342
 5,480
 4,503
Net cash flows from operating activities9,785 6,342 5,480 
Cash flows from investing activities     Cash flows from investing activities
Purchases of fixed maturities available for sale(25,846) (24,700) (25,720)Purchases of fixed maturities available for sale(26,298)(25,846)(24,700)
Purchases of to be announced mortgage-backed securities
 (35) (27)Purchases of to be announced mortgage-backed securities0 (35)
Purchases of fixed maturities held to maturity(229) (456) (352)Purchases of fixed maturities held to maturity(202)(229)(456)
Purchases of equity securities(531) (207) (173)Purchases of equity securities(6,419)(531)(207)
Sales of fixed maturities available for sale13,110
 14,001
 13,228
Sales of fixed maturities available for sale11,377 13,110 14,001 
Sales of to be announced mortgage-backed securities6
 29
 27
Sales of to be announced mortgage-backed securities0 29 
Sales of equity securities611
 315
 187
Sales of equity securities3,880 611 315 
Maturities and redemptions of fixed maturities available for sale9,039
 7,352
 10,425
Maturities and redemptions of fixed maturities available for sale12,450 9,039 7,352 
Maturities and redemptions of fixed maturities held to maturity946
 1,124
 879
Maturities and redemptions of fixed maturities held to maturity995 946 1,124 
Net change in short-term investments(1,117) 516
 (537)Net change in short-term investments(81)(1,117)516 
Net derivative instruments settlements(703) 16
 (265)Net derivative instruments settlements(113)(703)16 
Private equity contributions(1,315) (1,337) (648)Private equity contributions(1,924)(1,315)(1,337)
Private equity distributions1,390
 980
 1,084
Private equity distributions907 1,390 980 
Acquisition of subsidiaries (net of cash acquired of $45, nil, and nil)(29) 
 
Acquisition of subsidiaries (net of cash acquired of NaN, $45, NaN)Acquisition of subsidiaries (net of cash acquired of NaN, $45, NaN)0 (29)
Payment, including deposit, for Huatai Group interestPayment, including deposit, for Huatai Group interest(1,623)(580)
Other(1,237) (533) (530)Other(470)(657)(533)
Net cash flows used for investing activities(5,905) (2,935) (2,422)Net cash flows used for investing activities(7,521)(5,905)(2,935)
Cash flows from financing activities     Cash flows from financing activities
Dividends paid on Common Shares(1,354) (1,337) (1,308)Dividends paid on Common Shares(1,388)(1,354)(1,337)
Common Shares repurchased(1,530) (1,044) (801)Common Shares repurchased(523)(1,530)(1,044)
Proceeds from issuance of long-term debt2,828
 2,171
 
Proceeds from issuance of long-term debt988 2,828 2,171 
Proceeds from issuance of repurchase agreements2,817
 2,029
 2,353
Proceeds from issuance of repurchase agreements2,354 2,817 2,029 
Repayment of long-term debt(510) (2,001) (501)Repayment of long-term debt(1,301)(510)(2,001)
Repayment of repurchase agreements(2,817) (2,019) (2,348)Repayment of repurchase agreements(2,354)(2,817)(2,019)
Proceeds from share-based compensation plans204
 115
 151
Proceeds from share-based compensation plans145 204 115 
Policyholder contract deposits514
 453
 442
Policyholder contract withdrawals(303) (358) (307)
Policyholder contract deposits and otherPolicyholder contract deposits and other470 514 453 
Policyholder contract withdrawals and otherPolicyholder contract withdrawals and other(386)(303)(358)
OtherOther(87)
Net cash flows used for financing activities(151) (1,991) (2,319)Net cash flows used for financing activities(2,082)(151)(1,991)
Effect of foreign currency rate changes on cash and restricted cash20
 (65) 1
Effect of foreign currency rate changes on cash and restricted cash8 20 (65)
Net increase (decrease) in cash and restricted cash306
 489
 (237)
Net increase in cash and restricted cashNet increase in cash and restricted cash190 306 489 
Cash and restricted cash – beginning of year1,340
 851
 1,088
Cash and restricted cash – beginning of year1,646 1,340 851 
Cash and restricted cash – end of year$1,646
 $1,340
 $851
Cash and restricted cash – end of year$1,836 $1,646 $1,340 
Supplemental cash flow information     Supplemental cash flow information
Taxes paid$912
 $503
 $736
Taxes paid$902 $912 $503 
Interest paid$512
 $621
 $644
Interest paid$524 $512 $621 
See accompanying notes to the consolidated financial statements

Consolidated Financial Statements

F-10


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
Chubb Limited and Subsidiaries



1.1. Summary of significant accounting policies

a) Basis of presentation

Chubb Limited is a holding company incorporated in Zurich, Switzerland. Chubb Limited, through its subsidiaries, provides a broad range of insurance and reinsurance products to insureds worldwide. Our results are reported through the following business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. Refer to Note 15 for additional information.

The accompanying consolidated financial statements,Consolidated Financial Statements, which include the accounts of Chubb Limited and its subsidiaries (collectively, Chubb, we, us, or our), have been prepared in accordance with accounting principles generally accepted in the United States of America (GAAP) and, in the opinion of management, reflect all adjustments necessary for a fair statement of the results and financial position for such periods. All significant intercompany accounts and transactions, including internal reinsurance transactions, have been eliminated.

The preparation of financial statements in conformity with GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenues and expenses during the reporting period. Amounts included in the Consolidated financial statementsFinancial Statements reflect our best estimates and assumptions; actual amounts could differ materially from these estimates. Chubb's principal estimates include:
unpaid loss and loss expense reserves, including long-tail asbestos and environmental (A&E) reserves and non-A&E casualty exposures;
future policy benefits reserves;
amortization of deferred policy acquisition costs and value of business acquired (VOBA);
reinsurance recoverable, including a provisionvaluation allowance for uncollectible reinsurance;
the assessment of risk transfer for certain structured insurance and reinsurance contracts;
the valuation of the investment portfolio and assessment of other than temporary impairment (OTTI);valuation allowance for expected credit losses;
the valuation of deferred income taxes;
the valuation of derivative instruments related to guaranteed living benefits (GLB);
the valuation and amortization of purchased intangibles; and
the assessment of goodwill for impairment.

b) Premiums
Premiums are generally recorded as written upon inception of the policy. For multi-year policies for which premiums written are payable in annual installments, only the current annual premium is included as written at policy inception due to the ability of the insured/reinsured to commute or cancel coverage within the policy term. The remaining annual premiums are recorded as written at each successive anniversary date within the multi-year term.

For property and casualty (P&C) insurance and reinsurance products, premiums written are primarily earned on a pro-rata basis over the policy terms to which they relate. Unearned premiums represent the portion of premiums written applicable to the unexpired portion of the policies in force. For retrospectively-rated policies, written premiums are adjusted to reflect expected ultimate premiums consistent with changes to incurred losses, or other measures of exposure as stated in the policy, and earned over the policy coverage period.

Mandatory reinstatement premiums assessed on reinsurance policies are earned in the period of the loss event that gave rise to the reinstatement premiums. All remaining unearned premiums are recognized over the remaining coverage period. 

Premiums from long-duration contracts such as certain traditional term life, whole life, endowment, and long-duration personal accident and health (A&H) policies are generally recognized as revenue when due from policyholders. Traditional life policies


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



include those contracts with fixed and guaranteed premiums and benefits. Benefits and expenses are matched with income to result in the recognition of profit over the life of the contracts.

Retroactive loss portfolio transfer (LPT) contracts in which the insured loss events occurred prior to contract inception are evaluated to determine whether they meet criteria for reinsurance accounting. If reinsurance accounting is appropriate, written premiums are fully earned and corresponding losses and loss expenses recognized at contract inception. These contracts can cause significant variances in gross premiums written, net premiums written, net premiums earned, and net incurred losses in the years in which they are written. Reinsurance contracts sold not meeting the criteria for reinsurance accounting are recorded using the deposit method as described below in Note 1 k).

Reinsurance premiums assumed are based on information provided by ceding companies supplemented by our own estimates of premium when we have not received ceding company reports. Estimates are reviewed and adjustments are recorded in the period in which they are determined. Premiums are earned over the coverage terms of the related reinsurance contracts and range from one to three years.

c) Deferred policy acquisition costs and value of business acquired
Policy acquisition costs consist of commissions (direct and ceded), premium taxes, and certain underwriting costs related directly to the successful acquisition of new or renewal insurance contracts. A VOBA intangible asset is established upon the acquisition of blocks of long-duration contracts in a business combination and represents the present value of estimated net cash flows for the contracts in force at the acquisition date. Acquisition costs and VOBA, collectively policy acquisition costs, are deferred and amortized. Amortization is recorded in Policy acquisition costs in the Consolidated statements of operations. Policy acquisition costs on P&C contracts are generally amortized ratably over the period in which premiums are earned. Policy acquisition costs on traditional long-duration contracts are amortized over the estimated life of the contracts, generally in proportion to premium revenue recognized based upon the same assumptions used in estimating the liability for future policy benefits. For non-traditional long-duration contracts, we amortize policy acquisition costs over the expected life of the contracts in proportion to expected gross profits. The effect of changes in estimates of expected gross profits is reflected in the period the estimates are revised. Policy acquisition costs are reviewed to determine if they are recoverable from future income, including investment income. Unrecoverable policy acquisition costs are expensed in the period identified.
Advertising costs are expensed as incurred except for direct-response campaigns that qualify for cost deferral, principally related to long-duration A&H business produced by the Overseas General Insurance segment, which are deferred and recognized as a component of Policy acquisition costs. For individual direct-response marketing campaigns that we can demonstrate have specifically resulted in incremental sales to customers and such sales have probable future economic benefits, incremental costs directly related to the marketing campaigns are capitalized as Deferred policy acquisition costs. Deferred policy acquisition costs, including deferred marketing costs, are reviewed regularly for recoverability from future income, including investment income, and amortized in proportion to premium revenue recognized, primarily over a ten-yearten-year period, the expected economic future benefit period based upon the same assumptions used in estimating the liability for future policy benefits. The expected future benefit period is evaluated periodically based on historical results and adjusted prospectively. The amount of deferred marketing costs reported in Deferred policy acquisition costs in the Consolidated balance sheets was $246$226 million and $255$246 million at December 31, 20192020 and 2018,2019, respectively. Amortization expense for deferred marketing costs was $99 million, $109 million, $114 million, and $116$114 million for the years ended December 31, 2020, 2019, 2018, and 2017,2018, respectively.

d) Reinsurance
Chubb assumes and cedes reinsurance with other insurance companies to provide greater diversification of business and minimize the net loss potential arising from large risks. Ceded reinsurance contracts do not relieve Chubb of its primary obligation to policyholders.

For both ceded and assumed reinsurance, risk transfer requirements must be met in order to account for a contract as reinsurance, principally resulting in the recognition of cash flows under the contract as premiums and losses. To meet risk transfer requirements, a reinsurance contract must include insurance risk, consisting of both underwriting and timing risk, and a reasonable possibility of a significant loss for the assuming entity. To assess risk transfer for certain contracts, Chubb generally develops expected discounted cash flow analyses at contract inception. Deposit accounting is used for contracts that do not meet risk transfer requirements. Deposit accounting requires that consideration received or paid be recorded in the balance sheet as opposed to recording premiums written or losses incurred in the statement of operations. Non-refundable fees on deposit contracts are earned based on the terms of the contract described below in Note 1 k).



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Reinsurance recoverable includes balances due from reinsurance companies for paid and unpaid losses and loss expenses and future policy benefits that will be recovered from reinsurers, based on contracts in force. The method for determining the reinsurance recoverable on unpaid losses and loss expenses incurred but not reported (IBNR) involves actuarial estimates consistent with those used to establish the associated liability for unpaid losses and loss expenses as well as a determination of Chubb's ability to cede unpaid losses and loss expenses under the terms of the reinsurance agreement.

Reinsurance recoverable is presented net of a provisionvaluation allowance for uncollectible reinsurance determined based upon a review of the financial condition of reinsurers and other factors. The provisionvaluation allowance for uncollectible reinsurance is based on an estimate of the reinsurance recoverable balance that will ultimately be unrecoverable due to reinsurer insolvency, a contractual dispute, or any other reason. The valuation of this provisionallowance includes several judgments including certain aspects of the allocation of reinsurance recoverable on IBNR claims by reinsurer and a default analysis to estimate uncollectible reinsurance. The primary components of the default analysis are reinsurance recoverable balances by reinsurer, net of collateral, and default factors used to determine the portion of a reinsurer's balance deemed uncollectible. The definition of collateral for this purpose requires some judgment and is generally limited to assets held in a Chubb-only beneficiary trust, letters of credit, and liabilities held with the same legal entity for which Chubb believes there is a contractual right of offset. The determination of the default factor is principally based on the financial strength rating of the reinsurer. Default factors require considerable judgment and are determined using the current financial strength rating, or rating equivalent, of each reinsurer as well as other key considerations and assumptions. Changes in the valuation allowance for uncollectible reinsurance recoverables are recorded in Losses and loss expenses in the Consolidated statements of operations. Our methodology to calculate the valuation allowance was consistent with the new expected credit loss guidance adopted on January 1, 2020. Therefore, there was no change to the valuation allowance upon adoption.The more significant considerations include, but are not necessarily limited to, the following:
For reinsurers that maintain a financial strength rating from a major rating agency, and for which recoverable balances are considered representative of the larger population (i.e., default probabilities are consistent with similarly rated reinsurers and payment durations conform to averages), the financial rating is based on a published source and the default factor is based on published default statistics of a major rating agency applicable to the reinsurer's particular rating class. When a recoverable is expected to be paid in a brief period of time by a highly rated reinsurer, such as certain property catastrophe claims, a default factor may not be applied;
For balances recoverable from reinsurers that are both unrated by a major rating agency and for which management is unable to determine a credible rating equivalent based on a parent, affiliate, or peer company, we determine a rating equivalent based on an analysis of the reinsurer that considers an assessment of the creditworthiness of the particular entity, industry benchmarks, or other factors as considered appropriate. We then apply the applicable default factor for that rating class. For balances recoverable from unrated reinsurers for which the ceded reserve is below a certain threshold, we generally apply a default factor of 34 percent, consistent with published statistics of a major rating agency;
34 percent, consistent with published statistics of a major rating agency;
For balances recoverable from reinsurers that are either insolvent or under regulatory supervision, we establish a default factor and resulting provisionvaluation allowance for uncollectible reinsurance based on reinsurer-specific facts and circumstances. Upon initial notification of an insolvency, we generally recognize an expense for a substantial portion of all balances outstanding, net of collateral, through a combination of write-offs of recoverable balances and increases to the provisionvaluation allowance for uncollectible reinsurance. When regulatory action is taken on a reinsurer, we generally recognize a default factor by estimating an expected recovery on all balances outstanding, net of collateral. When sufficient credible information becomes available, we adjust the provisionvaluation allowance for uncollectible reinsurance by establishing a default factor pursuant to information received; and
For other recoverables, management determines the provisionvaluation allowance for uncollectible reinsurance based on the specific facts and circumstances.

The methods used to determine the reinsurance recoverable balance and related provisionvaluation allowance for uncollectible reinsurance are regularly reviewed and updated, and any resulting adjustments are reflected in earnings in the period identified.

The methods used to determine the provisionvaluation allowance for uncollectible high deductible recoverable amounts and valuation allowance for insurance and reinsurance balances receivable are similar to the processes used to determine the provisionvaluation allowance for uncollectible reinsurance recoverable. For additional information on high deductible policies, refer to section k)h) Unpaid losses and loss expenses, below.

Prepaid reinsurance premiums represent the portion of premiums ceded to reinsurers applicable to the unexpired coverage terms of the reinsurance contracts in-force.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

The value of reinsurance business assumed of $6 millionis the deferred gain or loss related to loss portfolio transfers assumed and $14 million at December 31, 2019 and 2018, respectively, included in Other assets inis calculated as the accompanying Consolidated balance sheets, representsdifference between the excess of estimated ultimate value of the liabilities assumed under retroactive reinsurance contracts over consideration received. The value of reinsurance business assumedgain or loss is amortized and recorded to Losses and loss expenses based on the payment pattern of the losses assumed and ranges between 9 and 40 years.assumed. The unamortized value is reviewed regularly to determine if it is recoverable based upon the


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



terms of the contract, estimated losses and loss expenses, and anticipated investment income. Unrecoverable amounts are expensed in the period identified. The value of reinsurance business assumed at December 31, 2020 and 2019 were immaterial.

e) Investments
Fixed maturities, equity securities, and short-term investments
Fixed maturities are classified as either available for sale or held to maturity.
Available for sale (AFS) portfolio is reported at fair value, net of a valuation allowance for credit losses, with changes in fair value recorded as a separate component of AOCI in Shareholders' equity.
Held to maturity (HTM) portfolio includes securities for which we have the ability and intent to hold to maturity or redemption and is reported at amortized cost.cost, net of a valuation allowance for credit losses.

Equity securities are reported at fair value with changes in fair value recorded in net realized gains (losses) on the Consolidated statement of operations. Prior to January 1, 2018, changes in fair value were recorded as a separate component of AOCI in Shareholders' equity.

Short-term investments comprise securities due to mature within one year of the date of purchase and are recorded at fair value which typically approximates cost.

Interest, dividend income, and amortization of fixed maturity market premiums and discounts, related to these securities are recorded in Net investment income, net of investment management and custody fees, in the Consolidated statement of operations.

In addition, net investment income includes the amortization of the fair value adjustment related to the acquired invested assets of The Chubb Corporation (Chubb Corp). An adjustment of $1,652 million related to the fair value of Chubb Corp’s fixed maturities securities was recorded (fair value adjustment) at the date of acquisition. At December 31, 2019,2020, the remaining balance of this fair value adjustment was $332$213 million which is expected to amortize over the next threetwo years; however, the estimate could vary materially based on current market conditions, bond calls, and the duration of the acquired investment portfolio. In addition, sales of these acquired fixed maturities would also reduce the fair value adjustment balance. For mortgage-backed securities and any other holdings for which there is a prepayment risk, prepayment assumptions are evaluated and revised as necessary. Any adjustments required due to the resultant change in effective yields and maturities are recognized prospectively. Prepayment fees or call premiums that are only payable when a security is called prior to its maturity are earned when received and reflected in Net investment income. 

Valuation allowance for fixed income securities
Management evaluates current expected credit losses (CECL) for all HTM securities each quarter. U.S. treasury and agency securities and U.S. government agency mortgage-backed securities are assumed to have no risk of non-payment and therefore are excluded from the CECL evaluation. The remaining HTM securities are evaluated for potential credit loss on a collective pool basis. We elected to pool HTM securities by 1) external credit rating and 2) time to maturity (duration). These characteristics are the most representative of similar risk characteristics within our portfolio. Chubb pools HTM securities and calculates an expected credit loss for each pool using Moody’s corporate bond default average, corporate bond recovery rate, and an economic cycle multiplier. The multiplier is based on the leading economic index and will adjust the average default frequency for a forward-looking economic outlook. Management monitors the credit quality of HTM securities through the review of external credit ratings on a quarterly basis.
We regularly review our fixed maturities
Management evaluates expected credit losses (ECL) for other than temporary impairment (OTTI). Refer to Note 3 for additional information. With respect to fixed maturities where the decline inAFS securities when fair value is determinedbelow amortized cost. AFS securities are evaluated for potential credit loss on an individual security level but the evaluation may use assumptions consistent with expectations of credit losses for a group of similar securities. If management has the intent to sell or will be temporaryrequired to sell the security before recovery, the entire impairment loss will be recorded through income to net realized gains and losses. If management does not have the intent to sell or will not be required to sell the security before recovery, an allowance for credit losses is established and is not written down,recorded through income to net realized gains and losses, and the non-credit loss portion is recorded through other comprehensive income.
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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries


Examples of criteria that are collectively evaluated to determine if a subsequent decision may be madecredit loss has occurred include the following:
The extent to sell thatwhich the fair value is less than amortized cost;
Adverse conditions related to the security, and realizeindustry, or geographic area;
Downgrades in the security's credit rating by a loss. Subsequent decisions on fixed maturities sales are the result of changing or unforeseen factsrating agency; and circumstances (i.e., arising from a large insured loss such as a catastrophe), deterioration of the creditworthiness
Failure of the issuer to make scheduled principal or its industry, or changes in regulatory requirements. We believeinterest payments

AFS securities that subsequent decisionsmeet any one of the criteria included above will be subject to sell such securities are consistenta discounted cash flow analysis by comparing the present value of expected future cash flows with the classificationamortized cost basis. Projected cash flows are driven primarily by assumptions regarding probability of default and the timing and amount of recoveries associated with defaults. Chubb developed the projected cash flows using market data, issuer-specific information, and credit ratings. In combination with contractual cash flows and the use of historical default and recovery data by Moody's Investors Service (Moody's) rating category we generate expected cash flows using the average cumulative issuer-weighted global default rates by letter rating.

If the present value of expected future cash flows is less than the amortized cost, a credit loss exists and an allowance for credit losses will be recognized. If the present value of expected future cash flows is equal to or greater than the amortized cost basis, management will conclude an expected credit loss does not exist.

Management reviews credit losses and the valuation allowance for expected credit losses each quarter. When all or a portion of a fixed maturity security is identified to be uncollectible and written off, the valuation allowance for expected credit losses is reduced by the same amount. In general, a security is considered uncollectible no later than when all efforts to collect contractual cash flows have been exhausted. Below are considerations for when a security may be deemed uncollectible:
We have sufficient information to determine that the issuer of the majoritysecurity is insolvent;
We receive notice that the issuer of the portfoliosecurity has filed for bankruptcy, and the collectability is expected to be adversely impacted by the bankruptcy;
The issuer of a security has violated multiple debt covenants;
Amounts have been past due for a specified period of time with no response from the issuer;
A significant deterioration in the value of the collateral has occurred;
We have received correspondence from the issuer of the security indicating that it doesn’t intend to pay the contractual principal and interest.
We elected to not measure an allowance for accrued investment income as availableuncollectible balances are written off in a timely manner, typically 30 to 45 days after uncollected balances are due.
Prior to January 1, 2020, fixed income securities were evaluated individually for sale.other-than-temporary impairment (OTTI) and a realized loss was recognized once certain criteria were met.

Other investments
Other investments principally comprise investment funds, limited partnerships, partially-owned investment companies, life insurance policies, policy loans, and non-qualified separate account assets.

Investment funds and limited partnerships
Investment funds, limited partnerships, and all other investments over which Chubb cannot exercise significant influence are accounted for as follows. Generally, we own less than three percent of the investee’s shares.
Income and expenses from these funds are reported within Net investment income.
These funds are carried at net asset value, which approximates fair value with changes in fair value recorded in net realized gains (losses) on the Consolidated statement of operations. Refer to Note 4 for a further discussion on net asset value.
4 for a further discussion on net asset value. Prior to January 1, 2018, changes in fair value were recorded as a separate component of AOCI in Shareholders' equity.
As a result of the timing of the receipt of valuation data from the investment managers, these investments are generally reported on a three-month lag.
Sales of these investments are reported within Net realized gains (losses).


F-14F-15


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Partially-owned investment companies
Partially-owned investment companies where our ownership interest is in excess of three percent are accounted for under the equity method because Chubb exerts significant influence. These investments apply investment company accounting to determine operating results, and Chubb retains the investment company accounting in applying the equity method.
This means that investment income, realized gains or losses, and unrealized gains or losses are included in the portion of equity earnings reflected in Other (income) expense.
As a result of the timing of the receipt of valuation data from the investment managers, these investments are generally reported on a three-month lag.
Other
Policy loans are carried at outstanding balance and interest income is reflected in Net investment income.
Life insurance policies are carried at policy cash surrender value and income is reflected in Other (income) expense.
Non-qualified separate account assets are supported by assets that do not qualify for separate accounting reporting under GAAP. The underlying securities are recorded on a trade date basis and carried at fair value. Unrealized gains and losses on non-qualified separate account assets are reflected in Other (income) expense.

Investments in partially-owned insurance companies
Investments in partially-owned insurance companies primarily represent direct investments in which Chubb has significant influence and as such, meet the requirements for equity accounting. Generally, we own twenty percent or more of the investee’s shares. We report our share of the net income or loss of the partially-owned insurance companies in Other (income) expense.

Derivative instruments
Chubb recognizes all derivatives at fair value in the Consolidated balance sheets in either Accounts payable, accrued expenses, and other liabilities or Other assets. Changes in fair value are included in Net realized gains (losses) in the Consolidated statements of operations. We did not designate any derivatives as accounting hedges. We participate in derivative instruments in two principal ways:

(i) To sell protection to customers as an insurance or reinsurance contract that meets the definition of a derivative for accounting purposes. The reinsurance of GLBs wasThis category principally comprised our primary product falling into this category;GLB contracts; and
(ii) To mitigate financial risks and manage certain investment portfolio risks and exposures, including assets and liabilities held in foreign currencies. We use derivative instruments including futures, options, swaps, and foreign currency forward contracts. Refer to Note 10 for additional information.

Securities lending program
Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return which is recorded within Net investment income in the Consolidated statement of operations.

Borrowers provide collateral, in the form of either cash or approved securities, at a minimum of 102 percent of the fair value of the loaned securities. Each security loan is deemed to be an overnight transaction. Cash collateral is invested in a collateral pool which is managed by the banking institution. The collateral pool is subject to written investment guidelines with key objectives which include the safeguard of principal and adequate liquidity to meet anticipated redemptions. The fair value of the loaned securities is monitored on a daily basis, with additional collateral obtained or refunded as the fair value of the loaned securities changes. The collateral is held by the third-party banking institution, and the collateral can only be accessed in the event that the institution borrowing the securities is in default under the lending agreement. As a result of these restrictions, we consider our securities lending activities to be non-cash investing and financing activities. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan.

The fair value of the securities on loan is included in fixed maturities and equity securities in the Consolidated balance sheets. The securities lending collateral is reported as a separate line in the Consolidated balance sheets with a related liability reflecting our obligation to return the collateral plus interest.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Repurchase agreements
Similar to securities lending arrangements, securities sold under repurchase agreements, whereby Chubb sells securities and repurchases them at a future date for a predetermined price, are accounted for as collateralized investments and borrowings and are recorded at the contractual repurchase amounts plus accrued interest. Assets to be repurchased are the same or substantially the same as the assets transferred, and the transferor, through right of substitution, maintains the right and ability to redeem the collateral on short notice. The fair value of the underlying securities is included in fixed maturities and equity securities. In contrast to securities lending programs, the use of cash received is not restricted. We report the obligation to return the cash as Repurchase agreements in the Consolidated balance sheets and record the fees under these repurchase agreements within Interest expense on the Consolidated statement of operations.

Refer to Note 4 for a discussion on the determination of fair value for Chubb's various investment securities.

f) Cash
Cash includes cash on hand and deposits with an original maturity of three months or less at time of purchase.

We have agreements with a third-party bank provider which implemented two international multi-currency notional cash pooling programs. In each program, participating Chubb entities establish deposit accounts in different currencies with the bank provider and each day the credit or debit balances in every account are notionally translated into a single currency (U.S. dollars) and then notionally pooled. The bank extends overdraft credit to any participating Chubb entity as needed, provided that the overall notionally-pooled balance of all accounts in each pool at the end of each day is at least zero. Actual cash balances are not physically converted and are not commingled between legal entities. Any overdraft balances incurred under this program by a Chubb entity would be guaranteed by Chubb Limited (up to $300 million in the aggregate). Our syndicated letter of credit facility allows for same day drawings to fund a net pool overdraft should participating Chubb entities overdraw contributed funds from the pool.

Restricted cash
Restricted cash in the Consolidated balance sheets represents amounts held for the benefit of third parties and is legally or contractually restricted as to withdrawal or usage. Amounts include deposits with U.S. and non-U.S. regulatory authorities, trust funds set up for the benefit of ceding companies, and amounts pledged as collateral to meet financing arrangements.

Effective January 1, 2018, we retrospectively adopted guidance on "Restricted Cash" that clarified the presentation of restricted cash on the Consolidated statement of cash flows. As a result, we revised the Consolidated statement of cash flows for the year ended December 31, 2017 to include restricted cash in the beginning and ending cash balances.

The following table provides a reconciliation of cash and restricted cash reported within the Consolidated balance sheets that total to the amounts shown in the Consolidated statements of cash flows:
December 31
(in millions of U.S. dollars)202020192018
Cash$1,747 $1,537 $1,247 
Restricted cash89 109 93 
Total cash and restricted cash shown in the Consolidated statements of cash flows$1,836 $1,646 $1,340 
 December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Cash$1,537
 $1,247
 $728
Restricted cash109
 93
 123
Total cash and restricted cash shown in the Consolidated statements of cash flows$1,646
 $1,340
 $851


g) Goodwill and Other intangible assets
Goodwill represents the excess of the cost of acquisitions over the fair value of net assets acquired and is not amortized. Goodwill is assigned at acquisition to the applicable reporting unit of the acquired entities giving rise to the goodwill. Goodwill impairment tests are performed annually or more frequently if circumstances indicate a possible impairment. For goodwill impairment testing, we use a qualitative assessment to determine whether it is more likely than not (i.e., more than a 50 percent probability) that the fair value of a reporting unit is greater than its carrying amount. If our assessment indicates less than a 50 percent probability that fair value exceeds carrying value, we quantitatively estimate a reporting unit's fair value. Goodwill recorded in connection with investments in partially-owned insurance companies is recorded in Investments in partially-owned insurance companies and is also measured for impairment annually.

Indefinite lived intangible assets are not subject to amortization. Finite lived intangible assets are amortized over their useful lives, generally ranging from 1 towith an average original useful life of 25 years. Intangible assets are regularly reviewed for indicators of impairment. Impairment is recognized if the carrying amount is not recoverable from its undiscounted cash flows and is measured as the difference between the carrying amount and fair value.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries




h) Unpaid losses and loss expenses
A liability is established for the estimated unpaid losses and loss expenses under the terms of, and with respect to, Chubb's policies and agreements. Similar to premiums that are recognized as revenues over the coverage period of the policy, a liability for unpaid losses and loss expenses is recognized as expense when insured events occur over the coverage period of the policy.

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

This liability includes a provision for both reported claims (case reserves) and incurred but not reported claims (IBNR reserves). IBNR reserve estimates are generally calculated by first projecting the ultimate cost of all losses that have occurred (expected losses), and then subtracting paid losses, case reserves, and loss expenses. The methods of determining such estimates and establishing the resulting liability are reviewed regularly and any adjustments are reflected in operationsincome in the period in which they become known. Future developments may result in losses and loss expenses materially greater or less than recorded amounts.

Except for net unpaid loss and loss expense reserves of $31$26 million, net of discount, held at December 31, 2019,2020, representing certain structured settlements for which the timing and amount of future claim payments are reliably determinable and $43$42 million, net of discount, of certain reserves for unsettled claims, Chubb does not discount its P&C loss reserves. This compares with reserves of $33$31 million for certain structured settlements and $40$43 million of certain reserves for unsettled claims at December 31, 2018.2019. Structured settlements represent contracts purchased from life insurance companies primarily to settle workers' compensation claims, where payments to the claimant by the life insurance company are expected to be made in the form of an annuity. Chubb retains the liability to the claimant in the event that the life insurance company fails to pay. At December 31, 2019,2020, the liability due to claimants was $567$548 million, net of discount, and reinsurance recoverables due from the life insurance companies was $536$522 million, net of discount. For structured settlement contracts where payments are guaranteed regardless of claimant life expectancy, the amounts recoverable from the life insurance companies at December 31, 20192020 are included in Other assets in the Consolidated balance sheets, as they do not meet the requirements for reinsurance accounting.

Included in Unpaid losses and loss expenses are liabilities for asbestos and environmental (A&E) claims and expenses. These unpaid losses and loss expenses are principally related to claims arising from remediation costs associated with hazardous waste sites and bodily-injury claims related to asbestos products and environmental hazards. The estimation of these liabilities is particularly sensitive to changes in the legal environment including specific settlements that may be used as precedents to settle future claims. However, Chubb does not anticipate future changes in laws and regulations in setting its A&E reserve levels.

Also included in Unpaid losses and loss expenses is the fair value adjustment of $145$110 million and $207$145 million at December 31, 20192020 and December 31, 2018,2019, respectively, related to Chubb Corp’s historical unpaid losses and loss expenses. The estimated fair value consists of the present value of the expected net unpaid loss and loss adjustment expense payments adjusted for an estimated risk margin. The estimated cash flows are discounted at a risk free rate. The estimated risk margin varies based on the inherent risks associated with each type of reserve. The fair value is amortized through Amortization of purchased intangibles on the consolidated statements of operations through the year 2032, based on the estimated payout patterns of unpaid loss and loss expenses at the acquisition date.

Our loss reserves are presented net of contractual deductible recoverable amounts due from policyholders. Under the terms of certain high deductible policies which we offer, such as workers’ compensation and general liability, our customers are responsible to reimburse us for an agreed-upon dollar amount per claim. In nearly all cases we are required under such policies to pay covered claims first, and then seek reimbursement for amounts within the applicable deductible from our customers. We generally seek to mitigate this risk through collateral agreements.

Prior period development arises from changes to loss estimates recognized in the current year that relate to loss reserves first reported in previous calendar years and excludes the effect of losses from the development of earned premiums from previous accident years.

For purposes of analysis and disclosure, management views prior period development to be changes in the nominal value of loss estimates from period to period, net of premium and profit commission adjustments on loss sensitive contracts. Prior period development generally excludes changes in loss estimates that do not arise from the emergence of claims, such as those related to uncollectible reinsurance, interest, unallocated loss adjustment expenses, or foreign currency. Accordingly, specific items excluded from prior period development include the following: gains/losses related to foreign currency remeasurement; losses recognized from the early termination or commutation of reinsurance agreements that principally relate to the time value of money; changes in the value of reinsurance business assumed reflected in losses incurred but principally related to the time value of money; and losses that arise from changes in estimates of earned premiums from prior accident years. Except for


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



foreign currency remeasurement, which is included in Net realized gains (losses), these items are included in current year losses.

i) Future policy benefits
The valuation of long-duration contract reserves requires management to make estimates and assumptions regarding expenses, mortality, persistency, and investment yields. Estimates are primarily based on historical experience and information provided by ceding companies and include a margin for
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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

adverse deviation. Interest rates used in calculating reserves range from less than 1.0 percent to 9.0 percent at December 31, 2020 compared to less than 1.0 percent to 11.0 percent at both December 31, 2019 and 2018.2019. Actual results could differ materially from these estimates. Management monitors actual experience and where circumstances warrant, will revise assumptions and the related reserve estimates. Revisions are recorded in the period they are determined.

Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets are classified as non-qualified separate account assets and reported in Other investments and the offsetting liabilities are reported in Future policy benefits in the Consolidated balance sheets. Changes in the fair value of separate account assets that do not qualify for separate account reporting under GAAP are reported in Other income (expense) and the offsetting movements in the liabilities are included in Policy benefits in the Consolidated statements of operations.

j) Assumed reinsurance programs involving minimum benefit guarantees under variable annuity contracts
Chubb reinsures various death and living benefit guarantees associated with variable annuities issued primarily in the United States. We generally receive a monthly premium during the accumulation phase of the covered annuities (in-force) based on a percentage of either the underlying accumulated account values or the underlying accumulated guaranteed values. Depending on an annuitant's age, the accumulation phase can last many years. To limit our exposure under these programs, all reinsurance treaties include annual or aggregate claim limits and many include an aggregate deductible.

The guarantees which are payable on death, referred to as guaranteed minimum death benefits (GMDB), principally cover shortfalls between accumulated account value at the time of an annuitant's death and either i) an annuitant's total deposits; ii) an annuitant's total deposits plus a minimum annual return; or iii) the highest accumulated account value attained at any policy anniversary date. In addition, a death benefit may be based on a formula specified in the variable annuity contract that uses a percentage of the growth of the underlying contract value. Liabilities for GMDBs are based on cumulative assessments or premiums to date multiplied by a benefit ratio that is determined by estimating the present value of benefit payments and related adjustment expenses divided by the present value of cumulative assessment or expected premiums during the contract period.  

Under reinsurance programs covering GLBs, we assume the risk of guaranteed minimum income benefits (GMIB) associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. We also assume the risk of guaranteed minimum accumulation benefits (GMAB). However, at December 31, 2019, the risks related to our GMAB programs are minimal given that the majority of these policies are no longer in force. Our GLB reinsurance products meet the definition of a derivative for accounting purposes and are carried at fair value with changes in fair value recognized in Realized gains (losses) in the Consolidated statement of operations. Refer to Notes 5 c) andNote 10 a) for additional information.

k) Deposit assets and liabilities
Deposit assets arise from ceded reinsurance contracts purchased that do not transfer significant underwriting or timing risk. Deposit liabilities include reinsurance deposit liabilities and contract holder deposit funds. The reinsurance deposit liabilities arise from contracts sold for which there is not a significant transfer of risk. Contract holder deposit funds represent a liability for investment contracts sold that do not meet the definition of an insurance contract, and certain of these contracts are sold with a guaranteed rate of return. Under deposit accounting, consideration received or paid is recorded as a deposit asset or liability in the balance sheet as opposed to recording premiums and losses in the statement of operations.

Interest income on deposit assets, representing the consideration received or to be received in excess of cash payments related to the deposit contract, is earned based on an effective yield calculation. The calculation of the effective yield is based on the amount and timing of actual cash flows at the balance sheet date and the estimated amount and timing of future cash flows. The effective yield is recalculated periodically to reflect revised estimates of cash flows. When a change in the actual or estimated cash flows occurs, the resulting change to the carrying amount of the deposit asset is reported as income or expense. Deposit assets of $93$107 million and $97$93 million at December 31, 20192020 and 2018,2019, respectively, are reflected in Other assets in


F-18


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



the Consolidated balance sheets and the accretion of deposit assets related to interest pursuant to the effective yield calculation is reflected in Net investment income in the Consolidated statements of operations.

Deposit liabilities include reinsurance deposit liabilities of $88$86 million and $97$88 million and contract holder deposit funds of $2.0$2.2 billion and $1.8$2.0 billion at December 31, 20192020 and 2018,2019, respectively. Deposit liabilities are reflected in Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets. At contract inception, the deposit liability equals net cash received. An accretion rate is established based on actuarial estimates whereby the deposit liability is increased to the estimated amount payable over the contract term. The deposit accretion rate is the rate of return required to fund expected future payment obligations. We periodically reassess the estimated ultimate liability and related expected rate of

F-19


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

return. Changes to the deposit liability are generally reflected through Interest expense to reflect the cumulative effect of the period the contract has been in force, and by an adjustment to the future accretion rate of the liability over the remaining estimated contract term.

The liability for contract holder deposit funds equals accumulated policy account values, which consist of the deposit payments plus credited interest less withdrawals and amounts assessed through the end of the period.

l) Property and Equipment
Property and equipment used in operations are capitalized and carried at cost less accumulated depreciation and are reported within Other assets in the Consolidated balance sheets. At December 31, 2019,2020, property and equipment totaled $1.9$2.0 billion, consisting principally of capitalized software costs of $1.1$1.3 billion incurred to develop or obtain computer software for internal use and company-owned facilities of $270$260 million. Depreciation is calculated using the straight-line method over the estimated useful lives of the assets. For capitalized software, the estimated useful life is generally three to five years, but can be as long as 15 years and for company-owned facilities the estimated useful life is 40 years. At December 31, 2018,2019, property and equipment totaled $1.7$1.9 billion. 

m) Foreign currency remeasurement and translation
The functional currency for each of our foreign operations is generally the currency of the local operating environment. Transactions in currencies other than a foreign operation's functional currency are remeasured into the functional currency, and the resulting foreign exchange gains and losses are reflected in Net realized gains (losses) in the Consolidated statements of operations. Functional currency assets and liabilities are translated into the reporting currency, U.S. dollars, using period end exchange rates and the related translation adjustments are recorded as a separate component of AOCI in Shareholders' equity. Functional statement of operations amounts expressed in functional currencies are translated using average exchange rates.

n) Administrative expenses
Administrative expenses generally include all operating costs other than policy acquisition costs. The North America Commercial P&C Insurance segment manages and uses an in-house third-party claims administrator, ESIS Inc. (ESIS). ESIS performs claims management and risk control services for domestic and international organizations that self-insure P&C exposures as well as internal P&C exposures. The net operating income of ESIS is included within Administrative expenses in the Consolidated statements of operations and were $18 million, $47 million, $49 million, and $38$49 million for the years ended December 31, 2020, 2019, 2018, and 2017,2018, respectively.

o) Income taxes
Income taxes have been recorded related to those operations subject to income tax. Deferred tax assets and liabilities result from temporary differences between the amounts recorded in the consolidated financial statementsConsolidated Financial Statements and the tax basis of our assets and liabilities. The effect on deferred tax assets and liabilities of a change in tax law or rates is recognized in the period that includes the enactment date. A valuation allowance against deferred tax assets is recorded if it is more likely than not that all, or some portion, of the benefits related to these deferred tax assets will not be realized. The valuation allowance assessment considers tax planning strategies, where appropriate.

We recognize uncertain tax positions deemedthat are determined to be more likely than not of being sustained upon examination. Recognized income tax positions are measured at the largest amount that has a greater than 50 percent likelihood of being realized. Changes in recognition or measurement are reflected in the period in which the change in judgment occurs.

p) Earnings per share
Basic earnings per share is calculated using the weighted-average shares outstanding, including participating securities with non-forfeitable rights to dividends such as unvested restricted stock. All potentially dilutive securities, including stock options are excluded from the basic earnings per share calculation. In calculating diluted earnings per share, the weighted-average


F-19


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



shares outstanding is increased to include all potentially dilutive securities. Basic and diluted earnings per share are calculated by dividing net income by the applicable weighted-average number of shares outstanding during the year.

q) Cash flow information
Premiums received and losses paid associated with the GLB reinsurance products, which as discussed previously, meet the definition of a derivative instrument for accounting purposes, are included within Cash flows from operating activities. Cash flows, such as settlements and collateral requirements, associated with GLB and all other derivative instruments, are included on a net basis within Cash flows from investing activities. Purchases, sales, and maturities of short-term investments are recorded on a net basis within Cash flows from investing activities.

r) Share-based compensation
Chubb measures and records compensation cost for all share-based payment awards at grant-date fair value. Compensation costs are recognized for vesting of share-based payment awards with only service conditions on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award were, in substance, multiple awards. For retirement-eligible participants, compensation costs for certain share-based payment awards are recognized immediately at the date of grant. Refer to Note 12 for additional information.

F-20

s)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries


r) Chubb integration expenses
Direct costs related to the Chubb Corp acquisition were expensed as incurred. Chubb integration expenses were nil, $23 million, $59 million, and $310$59 million for the years ended December 31, 2020, 2019 2018 and 2017,2018, respectively, and include all internal and external costs directly related to the integration activities of the Chubb Corp acquisition. These expenses principally consisted of personnel-related expenses, consulting fees, and rebranding.

t)s) New accounting pronouncements
Adopted in 2019
Premium Amortization on Purchased Callable Debt Securities
Effective January 1, 2019, we adopted new guidance on accounting for premium amortization on purchased callable debt securities for bonds held at a premium on a modified retrospective basis. The guidance requires the premium to be amortized to the earliest call date. As a result, we recorded a cumulative effect adjustment to decrease beginning retained earnings by $12 million after-tax ($15 million pre-tax). Securities held at a discount did not require an accounting change.

Lease Accounting
Effective January 1, 2019, we adopted new lease accounting guidance and elected to utilize a modified retrospective approach which allowed us to initially apply the new lease standard at the adoption date and recognize a cumulative effect adjustment to the opening balance of retained earnings for 2019, with no adjustment to prior periods presented. The cumulative effect adjustment to the opening balance of retained earnings was zero. Our leases consist principally of real estate operating leases that are amortized on a straight-line basis over the term of the lease. The adoption of the updated guidance resulted in recognizing a right-of-use asset, which was recorded within Other assets, and a lease liability, which was recorded within Accounts payable, accrued expenses, and other liabilities on the Consolidated balance sheet as well as de-recognizing the liability for deferred rent that was required under the previous guidance. The adoption of the new guidance did not have a material effect on our results of operations, financial condition or liquidity. Refer to Note 10 i) for additional information on leases.

Changes to the Disclosure Requirements for Fair Value Measurement
In August 2018, the FASB issued amendments to modify the disclosure requirements on fair value measurements. The amendments allow for the removal of: (i) the amount and reasons for transfer between Level 1 and Level 2 of the fair value hierarchy; (ii) the policy for timing of transfers between levels; and (iii) the valuation processes for Level 3 fair value measurements. This update also requires additional disclosure including an expanded discussion on unobservable inputs that are significant to the fair value measurement. We early adopted the amendments that allow the removal of certain disclosures in 2018 and added the expanded discussion on unobservable inputs in the fourth quarter of 2019, as permitted. The guidance changes disclosure only and did not have an impact on our financial condition or results of operations.

Adopted in 2020
Financial Instruments – Credit Losses: Measurement of Credit Losses on Financial Instruments
Effective January 1, 2020, we adopted, on a modified retrospective basis, new guidance on the accounting for credit losses of financial instruments that are measured at amortized cost, including held to maturity securities, and reinsurance recoverables, and high deductible receivables, by applying an approach based on the current expected credit losses (CECL). The estimate of


F-20


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



expected credit losses considers historical information, current information, as well as reasonable and supportable forecasts, including estimates of prepayments. In addition, the guidance also amendedreplaced the current available for sale (AFS) debt security other-than-temporary impairment model by requiring an estimate of the expected credit loss (ECL) only when the fair value is below the amortized cost of the asset. The length of time the fair value of an AFS security has been below theits amortized cost no longer impacts the determination of whether a potential credit loss exists. The AFS security model also requires the use of a valuation allowance as compared to the currentprevious practice of writing down the asset.

During the first quarter ofIn 2020, we established a valuation allowance for credit losses and recognized a cumulative effect adjustment and decreased beginning retained earnings by approximately $70$79 million pre-tax, or $64$72 million after-tax.after-tax, principally related to the valuation allowance for credit losses. We also adopted the required disclosures within Note 3 Investments and Note 5 Reinsurance. Results for reporting periods prior to January 1, 2020 are presented in accordance with the previous guidance.

Adopted in 2021
Income Taxes - Simplifying the Accounting for Income Taxes
Effective January 1, 2021, we adopted guidance which is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidance and amending other guidance. The adoption of the new guidance did not have a material effect on our results of operations or financial condition.

Accounting guidance not yet adopted
Effects of Reference Rate Reform on Financial Reporting
In March 2020, the FASB issued guidance which provides optional expedients and exceptions for applying GAAP to investments, derivatives, or other transactions that reference the London Interbank Offered Rate (LIBOR) or another reference rate expected to be discontinued because of reference rate reform. Along with the optional expedients, the amendments include a general principle that permits an entity to consider contract modifications due to reference reform to be an event that does not require contract re-measurement at the modification date or reassessment of a previous accounting determination. Additionally, a company may make a one-time election to sell, transfer, or both sell and transfer debt securities classified as held to maturity that reference a rate affected by reference rate reform and that were classified as held to maturity before January 1, 2020. This standard may be elected over time through December 31, 2022 as reference rate reform activities occur. Our exposure to LIBOR is limited and, accordingly, we do not expect reference rate reform to have a material impact on our Consolidated Financial Statements.

Targeted Improvements to the Accounting for Long-Duration Contracts
In August 2018, the FASB issued guidance to improve the existing recognition, measurement, presentation, and disclosure requirements for long-duration contracts issued by an insurance entity. The amendments in this update require more frequent updating of assumptions and a standardized discount rate for the future policy benefit liability, a requirement to use the fair value measurement model for policies with market risk benefits, simplified amortization of deferred acquisition costs, and enhanced disclosures. This standard will be effective for us in the first quarter of 20222023 with early adoption permitted. We are currently assessing the effect of adopting this guidance on our financial condition and results of operations. We will be better able to quantify the effect of adopting this standard as we progress in our implementation process and draw nearer to the date of adoption.

Income Taxes - Simplifying the Accounting for Income Taxes

In December 2019, the FASB issued updated guidance for the accounting for income taxes. The updated guidance is intended to simplify the accounting for income taxes by removing several exceptions contained in existing guidanceF-21


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and amending other existing guidance to simplify several other income tax accounting matters. The updated guidance is effective for us in the first quarter of 2021 with early adoption permitted. We are currently evaluating the impact of this guidance on our financial condition and results of operations; however, it is not expected to have a material impact at the date of adoption.Subsidiaries

2. Acquisitions

Huatai Group
Chubb maintains a direct investment in Huatai Insurance Group Company LimitedCo., Ltd. (Huatai Group). Huatai Group is the parent company of, and owns 100 percent of, Huatai Property & Casualty Insurance Co., Ltd. (Huatai P&C) and, approximately 80 percent of Huatai Life Insurance Co., Ltd. (Huatai Life), and approximately 82 percent of Huatai Asset Management Co., Ltd. (collectively, Huatai). Huatai Group's insurance operations have more than 600 branches and 11 million customers in China.

In 2019, Chubb increased itsentered into agreements to acquire an additional 22.4 percent ownership in Huatai Group through two separate purchases, a 15.3 percent ownership interest for approximately $1.1 billion and a 7.1 percent ownership interest for approximately $493 million. On July 13, 2020, we completed the 15.3 percent purchase. The purchase of the additional 7.1 percent ownership interest is contingent upon important conditions.

In connection with these purchase agreements, we paid $1.6 billion, including a collateralized deposit for the 7.1 percent tranche, in 2020. These transactions are recorded within investing activities on the Consolidated statement of cash flows.

Separately, in November 2020, we completed the purchase of an incremental 0.9 percent ownership interest in Huatai Group for approximately $65 million.

As of December 31, 2020, Chubb's aggregate ownership interest in Huatai Group from 20 percent to 30.9 percent, with purchases of 6.2 percent forwas approximately $329 million in May 2019 and 4.7 percent for approximately $251 million in December 2019.47.1 percent. Chubb continues to applyapplies the equity method of accounting to its investment in Huatai Group by recording its share of net income or loss in Other (income) expense in the Consolidated statements of operations. Refer to Note 14 for additional information. The Consolidated statements of operations include the equity income from the additional ownership interests as of each respective closing date.
During 2019, Chubb also entered into agreements to acquire an additional 22.4 percent ownership in Huatai Group for approximately $1.6 billion through two separate purchases, a 15.3 percent ownership interest for approximately $1.1 billion and a 7.1 percent ownership interest for approximately $493 million. These purchases are contingent upon Chinese insurance regulatory approval and other important conditions that are expected to be completed by the end of 2021. The purchase of the 7.1 percent ownership stake is also contingent upon the receipt of Chinese insurance regulatory approval of the 15.3 percent purchase.
Upon completion of the 7.1 percent purchase, which will result in majority ownership of Huatai Group, at 53.3 percent, Chubb is expected to obtain control of Huatai Group, Huatai P&C and Huatai Life.Huatai. At that time, Chubb is expected to apply consolidation accounting and discontinue the application of the equity method of accounting. 

Prior year acquisition
Banchile Seguros de Vida
On December 30, 2019, we acquired Banchile Seguros de Vida, an insurance company providing both life and property and casualty coverages in Chile, for approximately $80$74 million in cash. The consolidated financial statements will include results of this acquisition withinare included in the Chubb Overseas General Insurance and Life Insurance segment results.

segments as appropriate, determined by the type of policy written.

F-22
F-21


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



3. Investments

a) Fixed maturities
Effective January 1, 2020, we adopted new accounting guidance that requires a valuation allowance for credit losses to be established for fixed maturity securities classified as held to maturity (HTM) or available for sale (AFS).
December 31, 2019
Amortized
Cost

 
Gross
Unrealized
Appreciation

 
Gross
Unrealized
Depreciation

 
Fair
Value

 
OTTI Recognized
in AOCI

(in millions of U.S. dollars)    
Available for sale         
U.S. Treasury and agency$3,188
 $96
 $(1) $3,283
 $
Foreign22,670
 1,099
 (62) 23,707
 (25)
Corporate securities30,689
 1,180
 (78) 31,791
 (5)
Mortgage-backed securities18,712
 494
 (14) 19,192
 
States, municipalities, and political subdivisions7,321
 205
 (11) 7,515
 
 $82,580
 $3,074
 $(166) $85,488
 $(30)
Held to maturity         
U.S. Treasury and agency$1,318
 $29
 $
 $1,347
 $
Foreign1,423
 62
 
 1,485
 
Corporate securities2,349
 121
 (2) 2,468
 
Mortgage-backed securities2,331
 65
 
 2,396
 
States, municipalities, and political subdivisions5,160
 150
 (1) 5,309
 
 $12,581
 $427
 $(3) $13,005
 $
December 31, 2020
Amortized
Cost
Valuation AllowanceGross Unrealized AppreciationGross Unrealized DepreciationFair Value
(in millions of U.S. dollars)
Available for sale
U.S. Treasury / Agency$2,471 $0 $199 $0 $2,670 
Non-U.S.24,594 (6)1,808 (42)26,354 
Corporate and asset-backed securities34,095 (14)2,322 (72)36,331 
Mortgage-backed securities17,456 0 1,022 (8)18,470 
Municipal6,572 0 304 (2)6,874 
$85,188 $(20)$5,655 $(124)$90,699 
Amortized CostValuation AllowanceNet Carrying ValueGross Unrealized AppreciationGross Unrealized DepreciationFair
Value
Held to maturity
U.S. Treasury / Agency$1,392 $0 $1,392 $60 $0 $1,452 
Non-U.S.1,295 (7)1,288 118 (1)1,405 
Corporate and asset-backed securities2,185 (35)2,150 288 0 2,438 
Mortgage-backed securities2,000 (1)1,999 148 (1)2,146 
Municipal4,825 (1)4,824 245 0 5,069 
$11,697 $(44)$11,653 $859 $(2)$12,510 
December 31, 2019Amortized
Cost
Gross
Unrealized
Appreciation
Gross
Unrealized
Depreciation
Fair
Value
OTTI Recognized
in AOCI
(in millions of U.S. dollars)
Available for sale
U.S. Treasury / Agency$3,188 $96 $(1)$3,283 $
Non-U.S.22,670 1,099 (62)23,707 (25)
Corporate and asset-backed securities30,689 1,180 (78)31,791 (5)
Mortgage-backed securities18,712 494 (14)19,192 
Municipal7,321 205 (11)7,515 
$82,580 $3,074 $(166)$85,488 $(30)
Held to maturity
U.S. Treasury / Agency$1,318 $29 $$1,347 $
Non-U.S.1,423 62 1,485 
Corporate and asset-backed securities2,349 121 (2)2,468 
Mortgage-backed securities2,331 65 2,396 
Municipal5,160 150 (1)5,309 
$12,581 $427 $(3)$13,005 $


December 31, 2018Amortized
Cost

 Gross
Unrealized
Appreciation

 Gross
Unrealized
Depreciation

 Fair
Value

 OTTI Recognized
in AOCI

(in millions of U.S. dollars)    
Available for sale         
U.S. Treasury and agency$4,158
 $30
 $(43) $4,145
 $
Foreign21,370
 395
 (349) 21,416
 
Corporate securities27,183
 150
 (750) 26,583
 (6)
Mortgage-backed securities15,758
 66
 (284) 15,540
 (1)
States, municipalities, and political subdivisions10,854
 49
 (117) 10,786
 
 $79,323
 $690
 $(1,543) $78,470
 $(7)
Held to maturity         
U.S. Treasury and agency$1,185
 $8
 $(11) $1,182
 $
Foreign1,549
 11
 (18) 1,542
 
Corporate securities2,601
 11
 (104) 2,508
 
Mortgage-backed securities2,524
 5
 (43) 2,486
 
States, municipalities, and political subdivisions5,576
 16
 (51) 5,541
 
 $13,435
 $51
 $(227) $13,259
 $


F-23
As discussed in Note 3 c), if a credit loss is incurred on an impaired fixed maturity, an OTTI is considered to have occurred and the portion of the impairment not related to credit losses (non-credit OTTI) is recognized in OCI. Included in the “OTTI Recognized in AOCI” columns above are the cumulative amounts of non-credit OTTI recognized in OCI adjusted for subsequent sales, maturities, and redemptions. OTTI recognized in AOCI does not include the impact of subsequent changes in fair value of the related securities. In periods subsequent to a recognition of OTTI in OCI, changes in the fair value of the related fixed maturities are reflected in Net unrealized appreciation on investments in the Consolidated statements of shareholders' equity. For the years ended December 31, 2019 and 2018, $3 million of net unrealized appreciation and $4 million of net unrealized depreciation, respectively, related to such securities are included in OCI. At December 31, 2019 and 2018, AOCI included


F-22


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



cumulative net unrealized depreciationThe following table presents the amortized cost of $18 million and net unrealized appreciation of $1 million, respectively, relatedour HTM securities according to securities remaining in the investment portfolio for which a non-credit OTTI was recognized.

Mortgage-backed securities (MBS) issued by U.S. government agencies are combined with all other to be announced mortgage-backed securities held (refer to Note 10 b) (iv)) and are included in the category, “Mortgage-backed securities”. Approximately 83 percent and 81 percent of the total mortgage-backed securities at December 31, 2019 and 2018, respectively, are represented by investments in U.S. government agency bonds. The remainder of the mortgage exposure consists of collateralized mortgage obligations and non-government mortgage-backed securities, the majority of which provide a planned structure for principal and interest payments and carry a rating of AAA by the major credit rating agencies.

S&P rating:

December 31, 2020
(in millions of U.S. dollars)Amortized cost% of Total
AAA$2,511 22 %
AA6,193 53 %
A2,138 18 %
BBB826 7 %
BB28 0 %
Other1 0 %
Total$11,697 100 %

The following table presents fixed maturities by contractual maturity:

December 31  December 31 December 31December 31
  2019
   2018
20202019 
(in millions of U.S. dollars)Amortized Cost
 Fair Value
 Amortized Cost
 Fair Value
(in millions of U.S. dollars)Net Carrying ValueFair ValueAmortized CostFair Value
Available for sale       Available for sale
Due in 1 year or less$3,951
 $3,973
 $3,569
 $3,568
Due in 1 year or less$4,760 $4,760 $3,951 $3,973 
Due after 1 year through 5 years27,142
 27,720
 27,134
 27,005
Due after 1 year through 5 years26,227 26,227 27,142 27,720 
Due after 5 years through 10 years23,901
 24,874
 24,095
 23,543
Due after 5 years through 10 years27,232 27,232 23,901 24,874 
Due after 10 years8,874
 9,729
 8,767
 8,814
Due after 10 years14,010 14,010 8,874 9,729 
63,868
 66,296
 63,565
 62,930
72,229 72,229 63,868 66,296 
Mortgage-backed securities18,712
 19,192
 15,758
 15,540
Mortgage-backed securities18,470 18,470 18,712 19,192 
$82,580
 $85,488
 $79,323
 $78,470
$90,699 $90,699 $82,580 $85,488 
Held to maturity       Held to maturity
Due in 1 year or less$478
 $479
 $536
 $537
Due in 1 year or less$1,231 $1,240 $478 $479 
Due after 1 year through 5 years3,869
 3,940
 3,122
 3,106
Due after 1 year through 5 years3,592 3,760 3,869 3,940 
Due after 5 years through 10 years3,756
 3,883
 4,468
 4,407
Due after 5 years through 10 years3,029 3,228 3,756 3,883 
Due after 10 years2,147
 2,307
 2,785
 2,723
Due after 10 years1,802 2,136 2,147 2,307 
10,250
 10,609
 10,911
 10,773
9,654 10,364 10,250 10,609 
Mortgage-backed securities2,331
 2,396
 2,524
 2,486
Mortgage-backed securities1,999 2,146 2,331 2,396 
$12,581
 $13,005
 $13,435
 $13,259
$11,653 $12,510 $12,581 $13,005 

Expected maturities could differ from contractual maturities because borrowers may have the right to call or prepay obligations, with or without call or prepayment penalties. 


F-24


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

b) Gross unrealized loss
At December 31, 2019, there were 4,091 fixed maturities out of a total of 31,203 fixed maturities in an unrealized loss position. The largest single unrealized loss in the fixed maturities was $6 million. Fixed maturities in an unrealized loss position at December 31, 2019,2020, comprised both investment grade and below investment grade securities for which fair value declined primarily due to widening credit spreads since the date of purchase.


The following table presents, for AFS fixed maturities in an unrealized loss position (including securities on loan) that are not deemed to have credit losses, the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
F-23


 0 – 12 MonthsOver 12 MonthsTotal
December 31, 2020Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
(in millions of U.S. dollars)
Non-U.S.$1,628 $(35)$114 $(5)$1,742 $(40)
Corporate and asset-backed securities2,212 (33)593 (14)2,805 (47)
Mortgage-backed securities875 (6)35 (2)910 (8)
Municipal40 (1)16 (1)56 (2)
Total AFS fixed maturities$4,755 $(75)$758 $(22)$5,513 $(97)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(continued)
Chubb Limited and Subsidiaries



The following tables present,table presents, for all securities in an unrealized loss position (including securities on loan), the aggregate fair value and gross unrealized loss by length of time the security has continuously been in an unrealized loss position:
0 – 12 Months  Over 12 Months  Total  0 – 12 MonthsOver 12 MonthsTotal
December 31, 2019Fair Value
 
Gross
Unrealized Loss

 Fair Value
 
Gross
Unrealized Loss

 Fair Value
 
Gross
Unrealized Loss

December 31, 2019Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
Fair ValueGross
Unrealized Loss
(in millions of U.S. dollars) (in millions of U.S. dollars)
U.S. Treasury and agency$234
 $(1) $339
 $
 $573
 $(1)
Foreign1,846
 (34) 802
 (28) 2,648
 (62)
Corporate securities2,121
 (40) 988
 (40) 3,109
 (80)
U.S. Treasury / AgencyU.S. Treasury / Agency$234 $(1)$339 $$573 $(1)
Non-U.S.Non-U.S.1,846 (34)802 (28)2,648 (62)
Corporate and asset-backed securitiesCorporate and asset-backed securities2,121 (40)988 (40)3,109 (80)
Mortgage-backed securities1,174
 (6) 932
 (8) 2,106
 (14)Mortgage-backed securities1,174 (6)932 (8)2,106 (14)
States, municipalities, and political subdivisions188
 
 276
 (12) 464
 (12)
MunicipalMunicipal188 276 (12)464 (12)
Total fixed maturities$5,563
 $(81) $3,337
 $(88) $8,900
 $(169)Total fixed maturities$5,563 $(81)$3,337 $(88)$8,900 $(169)
 0 – 12 Months  Over 12 Months  Total 
December 31, 2018Fair Value
 
Gross
Unrealized Loss

 Fair Value
 
Gross
Unrealized Loss

 Fair Value
 
Gross
Unrealized Loss

(in millions of U.S. dollars)     
U.S. Treasury and agency$523
 $(4) $2,859
 $(50) $3,382
 $(54)
Foreign6,764
 (208) 5,349
 (159) 12,113
 (367)
Corporate securities16,538
 (599) 4,873
 (255) 21,411
 (854)
Mortgage-backed securities6,103
 (98) 6,913
 (229) 13,016
 (327)
States, municipalities, and political subdivisions5,024
 (44) 7,768
 (124) 12,792
 (168)
Total fixed maturities$34,952
 $(953) $27,762
 $(817) $62,714
 $(1,770)


c) Net realized gains (losses)

OTTI related to fixed maturities
In accordance with guidance related to the recognition and presentation of OTTI, when an impairment related to a fixed maturity has occurred, OTTI is required to be recorded in Net income if management has the intent to sell the security or it is more likely than not that we will be required to sell the security before the recovery of its amortized cost. Further, in cases where we do not intend to sell the security and it is more likely than not that we will not be required to sell the security, we must evaluate the security to determine the portion of the impairment, if any, related to credit losses. If a credit loss is incurred, an OTTI is considered to have occurred and any portion of the OTTI related to credit losses must be reflected in Net income while the portion of OTTI related to all other factors is recognized in OCI. For fixed maturities held to maturity, OTTI recognized in OCI is accreted from AOCI to the amortized cost of the fixed maturity prospectively over the remaining term of the securities. Each quarter, securities in an unrealized loss position (impaired securities), including fixed maturities and securities lending collateral are reviewed to identify impaired securities to be specifically evaluated for a potential OTTI.

Evaluation of potential credit losses related to fixed maturities
We review each fixed maturity in an unrealized loss position to assess whether the security is a candidate for credit loss. Specifically, we consider credit rating, market price, and issuer-specific financial information, among other factors, to assess the likelihood of collection of all principal and interest as contractually due. Securities, for which we determine that credit loss is likely, are subjected to further analysis to estimate the credit loss recognized in Net income, if any. In general, credit loss recognized in Net income equals the difference between the security’s amortized cost and the net present value of its projected future cash flows discounted at the effective interest rate implicit in the debt security. All significant assumptions used in determining credit losses are subject to change as market conditions evolve.



F-24


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



U.S. Treasury and agency obligations (including agency mortgage-backed securities); foreign government obligations; and states, municipalities, and political subdivisions obligations
U.S. Treasury and agency obligations (including agency mortgage-backed securities); foreign government obligations; and states, municipalities, and political subdivisions obligations represent $61 million of gross unrealized loss at December 31, 2019. These securities were evaluated for credit loss primarily using qualitative assessments of the likelihood of credit loss considering credit rating of the issuers and level of credit enhancement, if any. We concluded that the high level of creditworthiness of the issuers coupled with credit enhancement, where applicable, supports recognizing no credit loss in Net income.

Corporate and foreign securities
Projected cash flows for corporate and foreign securities (principally senior unsecured bonds) are driven primarily by assumptions regarding probability of default and the timing and amount of recoveries associated with defaults. Chubb developed projected cash flows for corporate and foreign securities using market observable data, issuer-specific information, and credit ratings. We use historical default data by Moody’s Investors Service (Moody’s) rating category to calculate a 1-in-100 year probability of default, which results in a default assumption in excess of the historical mean default rate. Consistent with management's approach, Chubb assumed a 32 percent recovery rate (the par value of a defaulted security that will be recovered) across all rating categories, rather than using Moody's historical mean recovery rate of 42 percent. We believe that use of a default assumption, in excess of the historical mean is conservative. The following table presents default assumptions by Moody's rating category (historical mean default rate provided for comparison):
 Investment Grade Below Investment Grade 
 Aaa-Baa Ba
 B
 Caa-C
1-in-100 Year Default Rate0.0 - 1.3% 4.8% 12.0% 36.3%
Historical Mean Default Rate0.0 - 0.3% 1.0% 3.1% 10.4%

Application of the methodology and assumptions described above resulted in pre-tax credit losses recognized in Net income for corporate and foreign securities of $37 million, $25 million, and $5 million for the years ended December 31, 2019, 2018, and 2017, respectively.

Mortgage-backed securities
For mortgage-backed securities, credit impairment is assessed using a cash flow model that estimates the cash flows on the underlying mortgages, using the security-specific collateral and transaction structure. The model estimates cash flows from the underlying mortgage loans and distributes those cash flows to various tranches of securities, considering the transaction structure and any subordination and credit enhancements that exist in that structure. The cash flow model incorporates actual cash flows on the mortgage-backed securities through the current period and then projects the remaining cash flows using a number of assumptions, including default rates, prepayment rates, and loss severity rates (the par value of a defaulted security that will not be recovered) on foreclosed properties.

We develop specific assumptions using market data, where available, and include internal estimates as well as estimates published by rating agencies and other third-party sources. We project default rates by mortgage sector considering current underlying mortgage loan performance, generally assuming lower loss severity for Prime sector bonds versus ALT-A and Sub-prime bonds.

These estimates are extrapolated along a default timing curve to estimate the total lifetime pool default rate. Other assumptions used contemplate the actual collateral attributes, including geographic concentrations, rating agency loss projections, rating actions, and current market prices. If cash flow projections indicate that losses will exceed the credit enhancement for a given tranche, then we do not expect to recover our amortized cost basis, and we recognize an estimated credit loss in Net income.

For the years ended December 31, 2019, 2018, and 2017 there were no credit losses recognized in Net income for mortgage-backed securities.



F-25


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents a roll-forward of pre-tax credit losses related to fixed maturities for which a portion of OTTI was recognized in OCI: 
Year Ended December 31
(in millions of U.S. dollars)20192018
Balance of credit losses related to securities still held – beginning of year$34 $22 
Additions where no OTTI was previously recorded33 20 
Additions where an OTTI was previously recorded
Reductions for securities sold during the period(41)(13)
Balance of credit losses related to securities still held – end of year$30 $34 



F-25

 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Balance of credit losses related to securities still held – beginning of year$34
 $22
 $35
Additions where no OTTI was previously recorded33
 20
 4
Additions where an OTTI was previously recorded4
 5
 2
Reductions for securities sold during the period(41) (13) (19)
Balance of credit losses related to securities still held – end of year$30
 $34
 $22

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

The following table presents the components of Net realized gains (losses) and the change in net unrealized appreciation (depreciation) of investments:
 Year Ended December 31
(in millions of U.S. dollars)202020192018
Fixed maturities:
OTTI on fixed maturities, gross$ $(90)$(52)
OTTI on fixed maturities recognized in OCI (pre-tax)0 32 
OTTI on fixed maturities, net (58)(49)
Gross realized gains excluding OTTI244 203 334 
Gross realized losses excluding OTTI(366)(176)(587)
Recovery of expected credit losses11 
Impairment (1)
(170)
Total fixed maturities(281)(31)(302)
Equity securities586 104 (59)
Other investments(32)(20)(5)
Foreign exchange gains (losses)(483)131 
Investment and embedded derivative instruments81 (435)(75)
Fair value adjustments on insurance derivative(202)(4)(248)
S&P futures(108)(138)(4)
Other derivative instruments1 (8)(3)
Other(60)(5)(87)
Net realized gains (losses) (pre-tax)$(498)$(530)$(652)
Change in net unrealized appreciation (depreciation) on investments (pre-tax):
Fixed maturities available for sale$2,628 $3,769 $(1,958)
Fixed maturities held to maturity(24)(31)(38)
Other(12)(3)
Income tax (expense) benefit(462)(647)297 
Change in net unrealized appreciation (depreciation) on investments (after-tax)$2,130 $3,088 $(1,699)
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Fixed maturities:     
OTTI on fixed maturities, gross$(90) $(52) $(24)
OTTI on fixed maturities recognized in OCI (pre-tax)32
 3
 1
OTTI on fixed maturities, net(58) (49) (23)
Gross realized gains excluding OTTI203
 334
 149
Gross realized losses excluding OTTI(176) (587) (157)
Total fixed maturities(31) (302) (31)
Equity securities (1)
104
 (59) 16
OTTI on other investments
 
 (12)
Other investments(20) (5) 
Foreign exchange gains7
 131
 36
Investment and embedded derivative instruments(435) (75) (11)
Fair value adjustments on insurance derivative(4) (248) 364
S&P futures(138) (4) (261)
Other derivative instruments(8) (3) (5)
Other(5) (87) (12)
Net realized gains (losses) (pre-tax)$(530) $(652) $84
      
Change in net unrealized appreciation (depreciation) on investments (pre-tax):     
Fixed maturities available for sale$3,769
 $(1,958) $519
Fixed maturities held to maturity(31) (38) 18
Equity securities
 
 88
Other(3) 
 8
Income tax (expense) benefit(647) 297
 (241)
Change in net unrealized appreciation (depreciation) on investments (after-tax)$3,088
 $(1,699) $392
(1)Relates to certain securities we intended to sell and securities written to market entering default.

(1)
2017 included gross realized gains of $28 million and gross realized losses of $2 million on sales, and OTTI of $10 million.



F-26


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Realized gains and losses from Equity securities and Other investments from the table above include sales of securities and unrealized gains and losses from fair value changes as follows:

Year Ended December 31, 2020Year Ended December 31, 2019Year Ended December 31, 2018
(in millions of U.S. dollars)Equity SecuritiesOther InvestmentsTotalEquity SecuritiesOther InvestmentsTotalEquity SecuritiesOther InvestmentsTotal
Net gains (losses) recognized during the period$586 $(32)$554 $104 $(20)$84 $(59)$(5)$(64)
Less: Net gains (losses) recognized from sales of securities455 0 455 58 (5)53 70 121 191 
Unrealized gains (losses) recognized for securities still held at reporting date$131 $(32)$99 $46 $(15)$31 $(129)$(126)$(255)

F-26


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

 Year Ended December 31, 2019  Year Ended December 31, 2018 
(in millions of U.S. dollars)Equity Securities
 Other Investments
 Total
 Equity Securities
 Other Investments
 Total
Net gains (losses) recognized during the period$104
 $(20) $84
 $(59) $(5) $(64)
Less: Net gains (losses) recognized from sales of securities58
 (5) 53
 70
 121
 191
Unrealized gains (losses) recognized for securities still held at reporting date$46
 $(15) $31
 $(129) $(126) $(255)
The following table presents a roll-forward of valuation allowance for expected credit losses on fixed maturities:
Year Ended
December 31
(in millions of U.S. dollars)2020
Available for sale
Valuation allowance for expected credit losses - beginning of period$0
Impact of adoption of new accounting guidance25
Provision for expected credit loss188
Initial allowance for purchased securities with credit deterioration5
Write-offs charged against the expected credit loss(5)
Recovery of expected credit loss(193)
Valuation allowance for expected credit losses - end of period$20
Held to maturity
Valuation allowance for expected credit losses - beginning of period$0
Impact of adoption of new accounting guidance44
Provision for expected credit loss9
Recovery of expected credit loss(9)
Valuation allowance for expected credit losses - end of period$44

Purchased Credit Deterioration (PCD) Securities
During the year ended December 31, 2020, we purchased $108 million of securities with credit deterioration, categorized as available for sale, and assessed an allowance for expected credit losses of $5 million at acquisition. These PCD securities had a par value at acquisition of $144 million.
d) Other investments
December 31
(in millions of U.S. dollars)20202019
Alternative investments:
Partially-owned investment companies$5,969 $4,142 
Limited partnerships547 508 
Investment funds254 271 
Alternative investments6,770 4,921 
Life insurance policies438 377 
Policy loans233 247 
Non-qualified separate account assets (1)
316 283 
Other188 234 
Total$7,945 $6,062 
 December 31 
(in millions of U.S. dollars)2019
 2018
Alternative investments:   
Partially-owned investment companies$4,142
 $3,623
Limited partnerships508
 538
Investment funds271
 83
Alternative investments4,921
 4,244
Life insurance policies377
 304
Policy loans247
 243
Non-qualified separate account assets (1)
283
 252
Other234
 234
Total$6,062
 $5,277
(1)Non-qualified separate account assets are comprised of mutual funds, supported by assets that do not qualify for separate account reporting under GAAP.

(1)

F-27


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Non-qualified separate account assets are comprised of mutual funds, supported by assets that do not qualify for separate account reporting under GAAP.

Alternative investments
Alternative investments include partially-owned investment companies, investment funds, and limited partnerships measured at fair value using net asset value (NAV) as a practical expedient. The following table presents, by investment category, the expected liquidation period, fair value, and maximum future funding commitments of alternative investments: 
December 31December 31
 20202019
(in millions of U.S. dollars)Expected Liquidation
Period of Underlying Assets
Fair ValueMaximum
Future Funding
Commitments
Fair ValueMaximum
Future Funding
Commitments
Financial2 to 10 Years$673 $237 $611 $329 
Real Assets2 to 11 Years805 598 712 422 
Distressed2 to 8 Years358 970 263 80 
Private Credit3 to 8 Years88 270 104 272 
Traditional2 to 14 Years4,519 1,125 2,844 2,160 
Vintage1 to 2 Years73 0 116 
Investment fundsNot Applicable254 0 271 
$6,770 $3,200 $4,921 $3,263 
   December 31  December 31 
   2019  2018 
(in millions of U.S. dollars)
Expected Liquidation
Period of Underlying Assets
 Fair Value
 
Maximum
Future Funding
Commitments

 Fair Value
 
Maximum
Future Funding
Commitments

Financial2 to 10 Years $611
 $329
 $596
 $193
Real Assets2 to 11 Years 712
 422
 704
 362
Distressed2 to 7 Years 263
 80
 296
 105
Private Credit3 to 8 Years 104
 272
 147
 310
Traditional2 to 14 Years 2,844
 2,160
 2,362
 2,735
Vintage1 to 2 Years 116
 
 56
 
Investment fundsNot Applicable 271
 
 83
 
   $4,921
 $3,263
 $4,244
 $3,705


Included in all categories in the above table, except for Investment funds, are investments for which Chubb will never have the contractual option to redeem but receives distributions based on the liquidation of the underlying assets. Further, for all categories except for Investment funds, Chubb does not have the ability to sell or transfer the investments without the consent from the general partner of individual funds.


F-27


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Investment CategoryConsists of investments in private equity funds:
Financialtargeting financial services companies, such as financial institutions and insurance services worldwide
Real Assetstargeting investments related to hard physical assets, such as real estate, infrastructure and natural resources
Distressedtargeting distressed corporate debt/credit and equity opportunities in the U.S.
Private Credittargeting privately originated corporate debt investments, including senior secured loans and subordinated bonds
Traditionalemploying traditional private equity investment strategies such as buyout and growth equity globally
Vintagefunds where the initial fund term has expired

Included in partially-owned investment companies and limited partnerships are 131130 individual limited partnerships covering a broad range of investment strategies including large cap buyouts, specialist buyouts, growth capital, distressed, mezzanine, real estate, and co-investments. The underlying portfolio consists of various public and private debt and equity securities of publicly traded and privately held companies and real estate assets. The underlying investments across various partnerships, geographies, industries, asset types, and investment strategies provide risk diversification within the limited partnership portfolio and the overall investment portfolio.

Investment funds employ various investment strategies such as long/short equity and arbitrage/distressed. Included in this category are investments for which Chubb has the option to redeem at agreed upon value as described in each investment fund’s subscription agreement. Depending on the terms of the various subscription agreements, investment fund investments may be redeemed monthly, quarterly, semi-annually, or annually. If Chubb wishes to redeem an investment fund investment, it must first determine if the investment fund is still in a lock-up period (a time when Chubb cannot redeem its investment so that the investment fund manager has time to build the portfolio). If the investment fund is no longer in its lock-up period, Chubb must then notify the investment fund manager of its intention to redeem by the notification date prescribed by the subscription agreement. Subsequent to notification, the investment fund can redeem Chubb’s investment within several months of the notification. Notice periods for redemption of the investment funds range between 5 and 120are up to 270 days. Chubb can redeem its investment funds without consent from the investment fund managers.


F-28


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

e) Investments in partially-owned insurance companies
The following table presents Investments in partially-owned insurance companies:
December 31, 2020December 31, 2019
(in millions of U.S. dollars, except for percentages)Carrying ValueGoodwillDirect Ownership PercentageCarrying ValueGoodwillDirect Ownership PercentageDomicile
Huatai Group$2,461 $1,313 47 %$1,053 $460 31 %China
Huatai Life Insurance Company201 69 20 %147 64 20 %China
Freisenbruch-Meyer10 3 40 %10 40 %Bermuda
Chubb Arabia Cooperative Insurance Company23 0 30 %20 30 %Saudi Arabia
Russian Reinsurance Company4 0 23 %23 %Russia
ABR Reinsurance Ltd.114 0 16 %100 12 %Bermuda
Total$2,813 $1,385 $1,332 $527 
 December 31, 2019  December 31, 2018   
(in millions of U.S. dollars, except for percentages)Carrying Value
 Direct Ownership Percentage
 Carrying Value
 Direct Ownership Percentage
 Domicile
Huatai Group$1,053
 31% $452
 20% China
Huatai Life Insurance Company147
 20% 106
 20% China
Freisenbruch-Meyer10
 40% 9
 40% Bermuda
Chubb Arabia Cooperative Insurance Company20
 30% 18
 30% Saudi Arabia
Russian Reinsurance Company2
 23% 2
 23% Russia
ABR Reinsurance Ltd.100
 12% 91
 12% Bermuda
Total$1,332
   $678
    


Huatai Group has a 100 percent ownership interest in Huatai P&C and an approximately 80 percent ownership interest in Huatai Life. At December 31, 2019, through its investment in Huatai Group, Chubb has a 30.9 percent indirect ownership in Huatai P&C and a 25 percent indirect ownership in Huatai Life. Chubb has a 20 percent direct ownership interest in Huatai Life. Therefore, Chubb’s aggregate direct and indirect ownership in Huatai Life is approximately 4557.5 percent, comprising 20 percent direct and 2537.5 percent indirect ownership interest.

The table above excludes the 15.3 percent and 7.1 percent of additional ownership commitmentscommitment in Huatai Group that are pending regulatory approvals and otheris contingent upon important conditions. Refer to Note 2 for additional information.


F-28


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



f) Net investment income
Year Ended December 31
(in millions of U.S. dollars)2020 2019 2018 
Fixed maturities (1)
$3,321 $3,385 $3,128 
Short-term investments48 84 90 
Other interest income19 25 118 
Equity securities81 26 33 
Other investments82 78 104 
Gross investment income (1)
3,551 3,598 3,473 
Investment expenses(176)(172)(168)
Net investment income (1)
$3,375 $3,426 $3,305 
(1) Includes amortization expense related to fair value adjustment of acquired invested assets
    related to the Chubb Corp acquisition
$(116)$(161)$(248)
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Fixed maturities$3,385
 $3,128
 $2,987
Short-term investments84
 90
 56
Other interest income25
 118
 75
Equity securities26
 33
 38
Other investments78
 104
 133
Gross investment income (1)
3,598
 3,473
 3,289
Investment expenses(172) (168) (164)
Net investment income (1)
$3,426
 $3,305
 $3,125
(1)  Includes amortization expense related to fair value adjustment of acquired invested assets
    related to the Chubb Corp acquisition

$(161) $(248) $(332)


g) Restricted assets
Chubb is required to maintain assets on deposit with various regulatory authorities to support its insurance and reinsurance operations. These requirements are generally promulgated in the statutory regulations of the individual jurisdictions. The assets on deposit are available to settle insurance and reinsurance liabilities. Chubb is also required to restrict assets pledged under repurchase agreements, which represent Chubb's agreement to sell securities and repurchase them at a future date for a predetermined price. We use trust funds in certain large reinsurance transactions where the trust funds are set up for the benefit of the ceding companies and generally take the place of letter of credit (LOC) requirements. We have investments in segregated portfolios primarily to provide collateral or guarantees for LOC and derivative transactions. Included in restricted assets are investments, primarily fixed maturities, totaling $19.6 billion and $21.0 billion, at both December 31, 2019 and 2018, and cash of $89 million and $109 million, at December 31, 2020 and $93 million,2019, respectively.
The following table presents the components of restricted assets: 
 December 31
 December 31
(in millions of U.S. dollars)2019
 2018
Trust funds$14,004
 $13,988
Deposits with U.S. regulatory authorities2,466
 2,405
Deposits with non-U.S. regulatory authorities2,709
 2,531
Assets pledged under repurchase agreements1,464
 1,468
Other pledged assets490
 692
Total$21,133
 $21,084


F-29


F-29


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The following table presents the components of restricted assets: 
December 31December 31
(in millions of U.S. dollars)20202019
Trust funds$12,305 $14,004 
Deposits with U.S. regulatory authorities2,438 2,466 
Deposits with non-U.S. regulatory authorities2,905 2,709 
Assets pledged under repurchase agreements1,462 1,464 
Other pledged assets584 490 
Total$19,694 $21,133 
4. Fair value measurements

a) Fair value hierarchy
Fair value of financial assets and financial liabilities is estimated based on the framework established in the fair value accounting guidance. The guidance defines fair value as the price to sell an asset or transfer a liability (an exit price) in an orderly transaction between market participants and establishes a three-level valuation hierarchy based on the reliability of the inputs. The fair value hierarchy gives the highest priority to quoted prices in active markets and the lowest priority to unobservable data.
 
The three levels of the hierarchy are as follows:
Level 1 – Unadjusted quoted prices for identical assets or liabilities in active markets;
Level 2 – Includes, among other items, inputs other than quoted prices that are observable for the asset or liability such as
interest rates and yield curves, quoted prices for similar assets and liabilities in active markets, and quoted prices for identical or similar assets and liabilities in markets that are not active; and
Level 3 – Inputs that are unobservable and reflect management’s judgments about assumptions that market participants
would use in pricing an asset or liability.

We categorize financial instruments within the valuation hierarchy at the balance sheet date based upon the lowest level of inputs that are significant to the fair value measurement.

We use pricing services to obtain fair value measurements for the majority of our investment securities. Based on management’s understanding of the methodologies used, these pricing services only produce an estimate of fair value if there is observable market information that would allow them to make a fair value estimate. Based on our understanding of the market inputs used by the pricing services, all applicable investments have been valued in accordance with GAAP. We do not adjust prices obtained from pricing services. The following is a description of the valuation techniques and inputs used to determine fair values for financial instruments carried at fair value, as well as the general classification of such financial instruments pursuant to the valuation hierarchy.

Fixed maturities
We use pricing services to estimate fair value measurements for the majority of our fixed maturities. The pricing services use market quotations for fixed maturities that have quoted prices in active markets; such securities are classified within Level 1. For fixed maturities other than U.S. Treasury securities that generally do not trade on a daily basis, the pricing services prepare estimates of fair value measurements using their pricing applications or pricing models, which include available relevant market information, benchmark curves, benchmarking of like securities, sector groupings, and matrix pricing. Additional valuation factors that can be taken into account are nominal spreads, dollar basis, and liquidity adjustments. The pricing services evaluate each asset class based on relevant market and credit information, perceived market movements, and sector news. The market inputs used in the pricing evaluation, listed in the approximate order of priority include: benchmark yields, reported trades, broker/dealer quotes, issuer spreads, two-sided markets, benchmark securities, bids, offers, reference data, and industry and economic events. The extent of the use of each input is dependent on the asset class and the market conditions. Given the asset class, the priority of the use of inputs may change, or some market inputs may not be relevant. Additionally, fixed maturities valuation is more subjective when markets are less liquid due to the lack of market based inputs (i.e., stale pricing), which and may require the use of models to be priced. The lack of market based inputs may increase the potential that an investment's estimated fair value is not reflective of the price at which an actual transaction would occur. The overwhelming majority of fixed maturities are classified within Level 2 because the most significant inputs used in the pricing techniques are observable. For a

F-30


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

small number of fixed maturities, we obtain a single broker quote (typically from a market maker). Due to the disclaimers on the quotes that indicate that the price is indicative only, we include these fair value estimates in Level 3. 

Equity securities
Equity securities with active markets are classified within Level 1 as fair values are based on quoted market prices. For equity securities in markets which are less active, fair values are based on market valuations and are classified within Level 2. Equity securities for which pricing is unobservable are classified within Level 3.



F-30


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Short-term investments
Short-term investments, which comprise securities due to mature within one year of the date of purchase that are traded in active markets, are classified within Level 1 as fair values are based on quoted market prices. Securities such as commercial paper and discount notes are classified within Level 2 because these securities are typically not actively traded due to their approaching maturity, and as such, their cost approximates fair value. Short-term investments for which pricing is unobservable are classified within Level 3.

Other investments
Fair values for the majority of Other investments including investments in partially-owned investment companies, investment funds, and limited partnerships are based on their respective net asset values or equivalent (NAV) and are excluded from the fair value hierarchy table below. Certain of our long-duration contracts are supported by assets that do not qualify for separate account reporting under GAAP. These assets comprise mutual funds, classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Other investments also include equity securities, classified within Level 1 and fixed maturities, classified within Level 2, held in rabbi trusts maintained by Chubb for deferred compensation plans and supplemental retirement plans and are classified within the valuation hierarchy on the same basis as other equity securities and fixed maturities. Other investments for which pricing is unobservable are classified within Level 3.

Securities lending collateral
The underlying assets included in Securities lending collateral in the Consolidated balance sheets are fixed maturities which are classified in the valuation hierarchy on the same basis as other fixed maturities. Excluded from the valuation hierarchy is the corresponding liability related to Chubb’s obligation to return the collateral plus interest as it is reported at contract value and not fair value in the Consolidated balance sheets.

Investment derivative instruments
Actively traded investment derivative instruments, including futures, options, and forward contracts are classified within Level 1 as fair values are based on quoted market prices. The fair value of cross-currency swaps and interest rate swaps is based on market valuations and is classified within Level 2. Investment derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Other derivative instruments
We maintain positions in exchange-traded equity futures contracts designed to limit exposure to a severe equity market decline, which would cause an increase in expected claims and, therefore, an increase in future policy benefit reserves for our guaranteed minimum death benefits (GMDB) and an increase in the fair value liability for our guaranteed living benefits (GLB) reinsurance business. Our positions in exchange-traded equity futures contracts are classified within Level 1. The fair value of the majority of the remaining positions in other derivative instruments is based on significant observable inputs including equity security and interest rate indices. Accordingly, these are classified within Level 2. Other derivative instruments based on unobservable inputs are classified within Level 3. Other derivative instruments are recorded in either Other assets or Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Separate account assets
Separate account assets represent segregated funds where investment risks are borne by the customers, except to the extent of certain guarantees made by Chubb. Separate account assets comprise mutual funds classified within Level 1 in the valuation hierarchy on the same basis as other equity securities traded in active markets. Separate account assets also include fixed maturities classified within Level 2 because the most significant inputs used in the pricing techniques are observable. Excluded from the valuation hierarchy are the corresponding liabilities as they are reported at contract value and not fair value in the Consolidated balance sheets. Separate account assets are recorded in Other assets in the Consolidated balance sheets.




F-31


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Guaranteed living benefits
The GLB arises from life reinsurance programs covering living benefit guarantees whereby we assume the risk of guaranteed minimum income benefits (GMIB) associated with variable annuity contracts. GLB’s are recorded in Accounts payable, accrued expenses, and other liabilities and Future policy benefits in the Consolidated balance sheets. Prior to 2020, a portion of the GLB liability that represented expected losses allocated to premiums received was recorded as incurred losses within Future policy benefits, with changes in these estimates recorded in Future policy benefits. We reclassified $441 million, $409 million, and $346 million of GLB liability as of December 31, 2019, 2018, and 2017, respectively, to Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets to conform with the new presentation. For GLB reinsurance, Chubb estimates fair value using an internal valuation model which includes current market information and estimates of policyholder behavior. All of the treaties contain claim limits, which are factored into the valuation model. The fair value depends on a number of factors, including interest rates, equity markets, credit risk, current account value, market volatility, expected annuitization rates and other policyholder behavior, and changes in policyholder mortality. Because of the significant use of unobservable inputs including policyholder behavior, GLB reinsurance is classified within Level 3.

Financial instruments measured at fair value on a recurring basis, by valuation hierarchy 
December 31, 2020Level 1Level 2Level 3Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury / Agency$2,148 $522 $0 $2,670 
Non-U.S.0 25,808 546 26,354 
Corporate and asset-backed securities0 34,758 1,573 36,331 
Mortgage-backed securities0 18,410 60 18,470 
Municipal0 6,874 0 6,874 
2,148 86,372 2,179 90,699 
Equity securities3,954 0 73 4,027 
Short-term investments2,866 1,474 5 4,345 
Other investments (1)
434 438 10 882 
Securities lending collateral0 1,844 0 1,844 
Investment derivative instruments35 0 0 35 
Separate account assets4,264 124 0 4,388 
Total assets measured at fair value (1)
$13,701 $90,252 $2,267 $106,220 
Liabilities:
Investment derivative instruments$52 $0 $0 $52 
Other derivative instruments17 0 0 17 
GLB (2)
0 0 1,089 1,089 
Total liabilities measured at fair value$69 $0 $1,089 $1,158 
(1)Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $6,770 million, policy loans of $233 million and other investments of $60 million at December 31, 2020 measured using NAV as a practical expedient.
(2)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.


F-31F-32


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



December 31, 2019Level 1Level 2Level 3Total
(in millions of U.S. dollars)
Assets:
Fixed maturities available for sale
U.S. Treasury / Agency$2,664 $619 $$3,283 
Non-U.S.23,258 449 23,707 
Corporate and asset-backed securities30,340 1,451 31,791 
Mortgage-backed securities19,132 60 19,192 
Municipal7,515 7,515 
2,664 80,864 1,960 85,488 
Equity securities728 15 69 812 
Short-term investments2,803 1,482 4,291 
Other investments (1)
412 377 10 799 
Securities lending collateral994 994 
Investment derivative instruments24 24 
Other derivative instruments
Separate account assets3,437 136 3,573 
Total assets measured at fair value (1)
$10,070 $83,868 $2,045 $95,983 
Liabilities:
Investment derivative instruments$93 $$$93 
Other derivative instruments13 13 
GLB (2)
897 897 
Total liabilities measured at fair value$106 $$897 $1,003 

(1)Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,921 million and other investments of $95 million at December 31, 2019 measured using NAV as a practical expedient.
Financial instruments measured(2)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value on a recurring basis, by valuation hierarchy 
December 31, 2019Level 1
 Level 2
 Level 3
 Total
(in millions of U.S. dollars)   
Assets:       
Fixed maturities available for sale       
U.S. Treasury and agency$2,664
 $619
 $
 $3,283
Foreign
 23,258
 449
 23,707
Corporate securities
 30,340
 1,451
 31,791
Mortgage-backed securities
 19,132
 60
 19,192
States, municipalities, and political subdivisions
 7,515
 
 7,515
 2,664
 80,864
 1,960
 85,488
Equity securities728
 15
 69
 812
Short-term investments2,803
 1,482
 6
 4,291
Other investments (1)
412
 377
 10
 799
Securities lending collateral
 994
 
 994
Investment derivative instruments24
 
 
 24
Other derivative instruments2
 
 
 2
Separate account assets3,437
 136
 
 3,573
Total assets measured at fair value (1)
$10,070
 $83,868
 $2,045
 $95,983
Liabilities:       
Investment derivative instruments$93
 $
 $
 $93
Other derivative instruments13
 
 
 13
GLB (2)

 
 456
 456
Total liabilities measured at fair value$106
 $
 $456
 $562
(1)value.
Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,921 million and other investments of $95 million at December 31, 2019 measured using NAV as a practical expedient.
(2)
Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. Refer to Note 5c) for additional information.




F-32


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(continued)
Chubb Limited and Subsidiaries



December 31, 2018Level 1
 Level 2
 Level 3
 Total
(in millions of U.S. dollars)   
Assets:       
Fixed maturities available for sale       
U.S. Treasury and agency$3,400
 $745
 $
 $4,145
Foreign
 21,071
 345
 21,416
Corporate securities
 25,284
 1,299
 26,583
Mortgage-backed securities
 15,479
 61
 15,540
States, municipalities, and political subdivisions
 10,786
 
 10,786
 3,400
 73,365
 1,705
 78,470
Equity securities713
 
 57
 770
Short-term investments1,575
 1,440
 1
 3,016
Other investments (1)
381
 303
 11
 695
Securities lending collateral
 1,926
 
 1,926
Investment derivative instruments28
 
 
 28
Other derivative instruments25
 
 
 25
Separate account assets2,686
 137
 
 2,823
Total assets measured at fair value (1)
$8,808
 $77,171
 $1,774
 $87,753
Liabilities:       
Investment derivative instruments$38
 $115
 $
 $153
GLB (2)

 
 452
 452
Total liabilities measured at fair value$38
 $115
 $452
 $605
(1)
Excluded from the table above are partially-owned investments, investment funds, and limited partnerships of $4,244 million and other investments of $95 million at December 31, 2018 measured using NAV as a practical expedient.
(2)
Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. Refer to Note 5c) for additional information.

Level 3 financial instruments
The following table presents the significant unobservable inputs used in the Level 3 liability valuations. Excluded from the table below are inputs used to determine the fair value of Level 3 assets which are based on single broker quotes and contain no quantitative unobservable inputs developed by management. The majority of our fixed maturities classified as Level 3 used external pricing when markets are less liquid due to the lack of market inputs (i.e., stale pricing, broker quotes).
(in millions of U.S. dollars, except for percentages)Fair Value at December 31 2020Valuation
Technique
Significant
Unobservable Inputs
Ranges
Weighted Average (1)
GLB (1)
$1,089 Actuarial modelLapse rate3% - 34%4.7 %
Annuitization rate0% - 100%3.6 %
(in millions of U.S. dollars, except for percentages)Fair Value at December 31 2019
 
Valuation
Technique
 
Significant
Unobservable Inputs
 Ranges 
Weighted Average (1)

GLB (1)
$456
 Actuarial model Lapse rate 3% – 34% 4.3%
     Annuitization rate 0% – 52% 3.2%
(1)The weighted average lapse and annuitization rates are determined by weighting each treaty's rates by the GLB contracts fair value.
(1)

The weighted average lapse and annuitization rates are determined by weighting each treaty's rates by the GLB contracts fair value.

The most significant policyholder behavior assumptions include lapse rates and the GMIB annuitization rates. Assumptions regarding lapse rates and GMIB annuitization rates differ by treaty, but the underlying methodologies to determine rates applied to each treaty are comparable.

A lapse rate is the percentage of in-force policies surrendered in a given calendar year. All else equal, as lapse rates increase, ultimate claim payments will decrease. In general, the base lapse function assumes low lapse rates during the surrender charge period of the GMIB contract, followed by a “spike” lapse rate in the year immediately following the surrender charge period, and then reverting to an ultimate lapse rate, typically over a 2-year period. This base rate is adjusted downward for policies with more valuable guarantees (policies with guaranteed values far in excess of their account values). Partial withdrawals and the impact of older policyholders with tax-qualified contracts (due to required minimum distributions) are also reflected in our modeling.



F-33F-33


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The GMIB annuitization rate is the percentage of policies for which the policyholder will elect to annuitize using the guaranteed benefit provided under the GMIB. All else equal, as GMIB annuitization rates increase, ultimate claim payments will increase, subject to treaty claim limits. All GMIB reinsurance treaties include claim limits to protect Chubb in the event that actual annuitization behavior is significantly higher than expected. In general, Chubb assumes that GMIB annuitization rates will be higher for policies with more valuable guarantees (policies with guaranteed values far in excess of their account values). Chubb also assumes that GMIB annuitization rates increase as policyholders get older. In addition, we also assume that GMIB annuitization rates are higher in the first year immediately following the waiting period (the first year the policies are eligible to annuitize using the GMIB) in comparison to all subsequent years. We do not yet have fully credible annuitization experience for all clients.
The effect of changes in key market factors on assumed lapse and annuitization rates reflect emerging trends using data available from cedants. For treaties with limited experience, rates are established in line with data received from other ceding companies adjusted, as appropriate, with industry estimates. The model and related assumptions are regularly re-evaluated by management and enhanced, as appropriate, based upon additional experience obtained related to policyholder behavior and availability of updated information such as market conditions, market participant assumptions, and demographics of in-force annuities. In the fourth quarter of 2019,2020, we completed a review of policyholder behavior related to annuitizations, partial withdrawals, lapses, and mortality for our variable annuity reinsurance business.
As annuitization experience continued to emerge, we refined our annuitization assumptions including age-based behavior. Additionally, for policies with highly valuable guarantees we increased our annuitization assumptions to reflect recent trends. These refinements resulted in a net increase to the fair value of GLB liabilities generating a realized loss of approximately $91 million.
We refined our mortality assumptions based on additional emerging experience. We also updated our reference mortality table to a more recent industry table. The updated mortality rates increased the fair value of GLB liabilities generating a realized loss of approximately $11 million.
Lapse As a result, we refined our policyholder behavior assumptions (mainly those relating to annuitizations and partial withdrawal assumptions were also refined based on additional emerging experience. The change in lapse and partial withdrawal assumptionswithdrawals), which had an insignificant impact on the fair value of GLB liabilities.
net income. During the year ended December 31, 2019,2020, we also made routine model refinements to the internal valuation model which resulted in ahad an insignificant impact on net increase in the fair value of GLB liabilities generating a realized loss of approximately $25 million.income.
The following tables present a reconciliation of the beginning and ending balances of financial instruments measured at fair value using significant unobservable inputs (Level 3): 
 AssetsLiabilities
 Available-for-Sale Debt SecuritiesEquity
securities
Short-term investmentsOther
investments
GLB (1)
Year Ended December 31, 2020Non-U.S.Corporate and asset-backed securitiesMBS
(in millions of U.S. dollars)
Balance, beginning of year$449 $1,451 $60 $69 $6 $10 $897 
Transfers into Level 30 134 0 0 0 0 0 
Transfers out of Level 3(16)(73)(1)(3)0 0 0 
Change in Net Unrealized Gains/Losses in OCI19 (8)0 0 0 0 0 
Net Realized Gains/Losses(1)(30)0 1 (1)0 202 
Purchases274 708 2 23 14 0 0 
Sales(122)(186)0 (17)(2)0 0 
Settlements(57)(423)(1)0 (12)0 0 
Other0 0 0 0 0 0 (10)
Balance, end of year$546 $1,573 $60 $73 $5 $10 $1,089 
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date$0 $(5)$0 $4 $0 $0 $202 
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date

$16 $(6)$0 $0 $0 $0 $0 
           Assets
 Liabilities
 Available-for-Sale Debt Securities  
Equity
securities

 Short-term investments
 
Other
investments

 
GLB (1)

Year Ended December 31, 2019Foreign
 
Corporate
securities

 MBS
  
(in millions of U.S. dollars)    
Balance, beginning of year$345
 $1,299
 $61
 $57
 $1
 $11
 $452
Transfers into Level 311
 23
 
 
 
 
 
Transfers out of Level 3(24) (38) (16) 
 
 
 
Change in Net Unrealized Gains/Losses in OCI13
 (2) 
 1
 
 
 
Net Realized Gains/Losses(1) (4) 
 (2) 
 
 4
Purchases228
 577
 19
 34
 6
 
 
Sales(70) (125) (1) (21) 
 
 
Settlements(53) (279) (3) 
 (1) (1) 
Balance, end of year$449
 $1,451
 $60
 $69
 $6
 $10
 $456
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date$
 $(2) $
 $(3) $
 $
 $4
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date

$7
 $(8) $
 $
 $
 $
 $
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.

(1)
F-34
Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits. Refer to Note 5c) for additional information.


F-34


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



 AssetsLiabilities
 Available-for-Sale Debt SecuritiesEquity
securities
Short-term investmentsOther
investments
GLB (1)
Year Ended December 31, 2019Non-U.S.Corporate and asset-backed securitiesMBS
(in millions of U.S. dollars)
Balance, beginning of year$345 $1,299 $61 $57 $$11 $861 
Transfers into Level 311 23 
Transfers out of Level 3(24)(38)(16)
Change in Net Unrealized Gains/Losses in OCI13 (2)
Net Realized Gains/Losses(1)(4)(2)
Purchases
228 577 19 34 
Sales(70)(125)(1)(21)
Settlements(53)(279)(3)(1)(1)
Other32 
Balance, end of year$449 $1,451 $60 $69 $$10 $897 
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date$$(2)$$(3)$$$
Change in Net Unrealized Gains/Losses included in OCI at the Balance Sheet Date$$(8)$$$$$0 
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
 Assets    Liabilities
 Available-for-Sale Debt Securities  
Equity
securities

 Short-term investments
 Other
investments

  Other derivative instruments
 
GLB (1)

Year Ended December 31, 2018Foreign
 
Corporate
securities

 MBS
 
(in millions of U.S. dollars)      
Balance, beginning of year$93
 $1,037
 $78
 $44
 $
 $263

$2
 $204
Transfers into Level 313
 24
 1
 
 5
 


 
Transfers out of Level 3(2) (31) (3) 
 
 (252) 
 
Change in Net Unrealized Gains/Losses in OCI(12) (4) 
 (2) 
 (2) 
 
Net Realized Gains/Losses(3) (5) 
 6
 
 1
 (2) 248
Purchases 
334
 672
 5
 37
 9
 50
 
 
Sales(69) (164) 
 (28) 
 
 
 
Settlements(9) (230) (20) 
 (13) (49) 
 
Balance, end of year$345
 $1,299
 $61
 $57
 $1
 $11
 $
 $452
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date$(1) $(7) $
 $(1) $
 $1
 $
 $248
(1)
Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $861 million at December 31, 2018 and $550 million at December 31, 2017, which includes a fair value derivative adjustment of $452 million and $204 million, respectively. 

 AssetsLiabilities
 Available-for-Sale Debt SecuritiesShort-term investmentsOther
derivative
instruments
GLB (1)
Year Ended December 31, 2018Non-U.S.Corporate and asset-backed securitiesMBSEquity
securities
Other
investments
(in millions of U.S. dollars)
Balance, beginning of year$93 $1,037 $78 $44 $$263 $$550 
Transfers into Level 313 24 
Transfers out of Level 3(2)(31)(3)(252)
Change in Net Unrealized Gains/Losses in OCI(12)(4)(2)(2)
Net Realized Gains/Losses(3)(5)(2)248 
Purchases
334 672 37 50 
Sales(69)(164)(28)
Settlements(9)(230)(20)(13)(49)
Other63 
Balance, end of year$345 $1,299 $61 $57 $$11 $$861 
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date$(1)$(7)$$(1)$$$$248 
(1)Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value.
 Assets  Liabilities 
 Available-for-Sale Debt Securities    Short-term investments
   
Other
derivative
instruments

 
GLB (2)

Year Ended December 31, 2017Foreign
 
Corporate
securities (1)

 MBS
 
Equity
securities

  
Other
investments

(in millions of U.S. dollars)     
Balance, beginning of year$74
 $681
 $45
 $41
 $25
 $225
 $13
 $559
Transfers into Level 3
 231
 50
 
 
 
 
 9
Transfers out of Level 3(3) (93) 
 
 
 
 (9) 
Change in Net Unrealized Gains/Losses in OCI3
 (12) 
 (1) 
 6
 
 
Net Realized Gains/Losses
 
 
 2
 
 
 (2) (364)
Purchases 
84
 521
 8
 24
 16
 56
 
 
Sales(59) (111) (1) (22) 
 
 
 
Settlements(6) (180) (24) 
 (41) (24) 
 
Balance, end of year$93
 $1,037
 $78
 $44
 $
 $263
 $2
 $204
Net Realized Gains/Losses Attributable to Changes in Fair Value at the Balance Sheet Date$(1) $(2) $
 $(1) $
 $
 $(2) $(364)
(1)
Transfers into and Purchases in Level 3 primarily consist of privately-placed fixed income securities.
(2)
Our GLB reinsurance product meets the definition of a derivative instrument for accounting purposes and is accordingly carried at fair value. Excluded from the table above is the portion of the GLB derivative liability classified as Future policy benefits in the Consolidated balance sheets. The liability for GLB reinsurance was $550 million at December 31, 2017 and $853 million at December 31, 2016, which includes a fair value derivative adjustment of $204 million and $559 million, respectively. 

b) Financial instruments disclosed, but not measured, at fair value
Chubb uses various financial instruments in the normal course of its business. Our insurance contracts are excluded from fair value of financial instruments accounting guidance, and therefore, are not included in the amounts discussed below.

The carrying values of cash, other assets, other liabilities, and other financial instruments not included below approximated their fair values.


F-35
F-35


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries




Investments in partially-owned insurance companies
Fair values for investments in partially-owned insurance companies are based on Chubb’s share of the net assets based on the financial statements provided by those companies and are excluded from the valuation hierarchy tables below.

Short- and long-term debt, repurchase agreements, and trust preferred securities
Where practical, fair values for short-term debt, long-term debt, repurchase agreements, and trust preferred securities are estimated using discounted cash flow calculations based principally on observable inputs including incremental borrowing rates, which reflect Chubb’s credit rating, for similar types of borrowings with maturities consistent with those remaining for the debt being valued.

The following tables present fair value, by valuation hierarchy, and carrying value of the financial instruments not measured at fair value:
December 31, 2020Fair ValueNet Carrying Value
(in millions of U.S. dollars)Level 1Level 2Level 3Total
Assets:
Fixed maturities held to maturity
U.S. Treasury / Agency$1,395 $57 $0 $1,452 $1,392 
Non-U.S.0 1,405 0 1,405 1,288 
Corporate and asset-backed securities0 2,438 0 2,438 2,150 
Mortgage-backed securities0 2,146 0 2,146 1,999 
Municipal0 5,069 0 5,069 4,824 
Total assets$1,395 $11,115 $0 $12,510 $11,653 
Liabilities:
Repurchase agreements$0 $1,405 $0 $1,405 $1,405 
Short-term debt0 0 0 0 0 
Long-term debt0 17,487 0 17,487 14,948 
Trust preferred securities0 473 0 473 308 
Total liabilities$0 $19,365 $0 $19,365 $16,661 
December 31, 2019Fair Value  Carrying Value
December 31, 2019Fair ValueCarrying Value
(in millions of U.S. dollars)Level 1
 Level 2
 Level 3
 Total
 (in millions of U.S. dollars)Level 1Level 2Level 3Total
Assets:         Assets:
Fixed maturities held to maturity         Fixed maturities held to maturity
U.S. Treasury and agency$1,292
 $55
 $
 $1,347
 $1,318
Foreign
 1,485
 
 1,485
 1,423
Corporate securities
 2,436
 32
 2,468
 2,349
U.S. Treasury / AgencyU.S. Treasury / Agency$1,292 $55 $$1,347 $1,318 
Non-U.S.Non-U.S.1,485 1,485 1,423 
Corporate and asset-backed securitiesCorporate and asset-backed securities2,436 32 2,468 2,349 
Mortgage-backed securities
 2,396
 
 2,396
 2,331
Mortgage-backed securities2,396 2,396 2,331 
States, municipalities, and political subdivisions
 5,309
 
 5,309
 5,160
MunicipalMunicipal5,309 5,309 5,160 
Total assets$1,292
 $11,681
 $32
 $13,005
 $12,581
Total assets$1,292 $11,681 $32 $13,005 $12,581 
Liabilities:         Liabilities:
Repurchase agreements$
 $1,416
 $
 $1,416
 $1,416
Repurchase agreements$$1,416 $$1,416 $1,416 
Short-term debt
 1,307
 
 1,307
 1,299
Short-term debt1,307 1,307 1,299 
Long-term debt
 15,048
 
 15,048
 13,559
Long-term debt15,048 15,048 13,559 
Trust preferred securities
 467
 
 467
 308
Trust preferred securities467 467 308 
Total liabilities$
 $18,238
 $
 $18,238
 $16,582
Total liabilities$$18,238 $$18,238 $16,582 


F-36
December 31, 2018Fair Value  Carrying Value
(in millions of U.S. dollars)Level 1
 Level 2
 Level 3
 Total
 
Assets:         
Fixed maturities held to maturity         
U.S. Treasury and agency$1,128
 $54
 $
 $1,182
 $1,185
Foreign
 1,542
 
 1,542
 1,549
Corporate securities
 2,477
 31
 2,508
 2,601
Mortgage-backed securities
 2,486
 
 2,486
 2,524
States, municipalities, and political subdivisions
 5,541
 
 5,541
 5,576
Total assets$1,128
 $12,100
 $31
 $13,259
 $13,435
Liabilities:         
Repurchase agreements$
 $1,418
 $
 $1,418
 $1,418
Short-term debt
 516
 
 516
 509
Long-term debt
 12,181
 
 12,181
 12,087
Trust preferred securities
 409
 
 409
 308
Total liabilities$
 $14,524
 $
 $14,524
 $14,322



F-36


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries




5. Reinsurance
5
. Reinsurance

a) Consolidated reinsurance
Chubb purchases reinsurance to manage various exposures including catastrophe risks. Although reinsurance agreements contractually obligate Chubb's reinsurers to reimburse it for the agreed-upon portion of its gross paid losses, they do not discharge Chubb's primary liability. The amounts for net premiums written and net premiums earned in the Consolidated statements of operations are net of reinsurance. The following table presents direct, assumed, and ceded premiums:
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Premiums written    
Direct$36,848
 $34,782
 $33,137
Assumed3,276
 3,186
 3,239
Ceded(7,849) (7,389) (7,132)
Net$32,275
 $30,579
 $29,244
Premiums earned  
 
Direct$35,876
 $34,108
 $32,782
Assumed3,107
 3,175
 3,332
Ceded(7,693) (7,219) (7,080)
Net$31,290
 $30,064
 $29,034


Year Ended December 31
(in millions of U.S. dollars)202020192018
Premiums written
Direct$37,749 $36,848 $34,782 
Assumed3,512 3,276 3,186 
Ceded(7,441)(7,849)(7,389)
Net$33,820 $32,275 $30,579 
Premiums earned
Direct$37,037 $35,876 $34,108 
Assumed3,323 3,107 3,175 
Ceded(7,243)(7,693)(7,219)
Net$33,117 $31,290 $30,064 
Ceded losses and loss expenses incurred were $5.0 billion, $4.9 billion, $5.6 billion, and $5.5$5.6 billion for the years ended December 31, 2020, 2019, 2018, and 2017,2018, respectively.

b) Reinsurance recoverable on ceded reinsurance
December 31, 2020December 31, 2019
(in millions of U.S. dollars)
Net Reinsurance Recoverable (1)
Valuation allowance
Net Reinsurance Recoverable (1)
Valuation allowance
Reinsurance recoverable on unpaid losses and loss expenses$14,647 $257 $14,181 $240 
Reinsurance recoverable on paid losses and loss expenses945 57 1,000 76 
Reinsurance recoverable on losses and loss expenses$15,592 $314 $15,181 $316 
Reinsurance recoverable on policy benefits$206��$5 $197 $
  December 31, 2019  December 31, 2018 
(in millions of U.S. dollars)
Net Reinsurance Recoverable (1)

 Provision for Uncollectible
 
Net Reinsurance Recoverable (1)

 Provision for Uncollectible
Reinsurance recoverable on unpaid losses and loss expenses$14,181
 $240
 $14,689
 $251
Reinsurance recoverable on paid losses and loss expenses1,000
 76
 1,304
 72
Reinsurance recoverable on losses and loss expenses$15,181
 $316
 $15,993
 $323
Reinsurance recoverable on policy benefits$197
 $4
 $202
 $4
(1)     Net of valuation allowance for uncollectible reinsurance.

(1)
Net of provision for uncollectible reinsurance.

The decreaseincrease in reinsurance recoverable on losses and loss expenses in 20192020 was primarily due to collections, principally on catastrophe losses.losses, partially offset by crop activity and prior period development.

We evaluate the financial condition of our reinsurers and potential reinsurers on a regular basis and also monitor concentrations of credit risk with reinsurers. The provisionvaluation allowance for uncollectible reinsurance is required principally due to the potential failure of reinsurers to indemnify Chubb, primarily because of disputes under reinsurance contracts and insolvencies. We have established provisionsa valuation allowance for amounts estimated to be uncollectible on both unpaid and paid losses as well as future policy benefits. Refer to Note 1 d) for a discussion of the valuation allowance methodology.


The following table presents a roll-forward of valuation allowance for uncollectible reinsurance related to Reinsurance recoverable on loss and loss expenses:
(in millions of U.S. dollars)Year Ended December 31, 2020
Valuation allowance for uncollectible reinsurance - beginning of period$316
Provision for uncollectible reinsurance21
Write-offs charged against the valuation allowance(25)
Foreign exchange revaluation2
Valuation allowance for uncollectible reinsurance - end of period$314

F-37F-37


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The following tables present a listing, at December 31, 2019,2020, of the categories of Chubb's reinsurers:
December 31, 2019Gross Reinsurance Recoverable on Loss and Loss Expenses
 Provision for Uncollectible Reinsurance
 % of Gross Reinsurance Recoverable
December 31, 2020December 31, 2020Gross Reinsurance Recoverable on Loss and Loss ExpensesValuation allowance for Uncollectible Reinsurance% of Gross Reinsurance Recoverable
(in millions of U.S. dollars, except for percentages)Gross Reinsurance Recoverable on Loss and Loss Expenses
 Provision for Uncollectible Reinsurance
 % of Gross Reinsurance Recoverable
(in millions of U.S. dollars, except for percentages)
Categories Categories
Largest reinsurers$6,594
 $72
 1.1%Largest reinsurers$7,267 $88 1.2 %
Other reinsurers rated A- or better4,624
 55
 1.2%Other reinsurers rated A- or better4,901 58 1.2 %
Other reinsurers with ratings lower than A- or not rated478
 70
 14.6%
Other reinsurers rated lower than A- or not ratedOther reinsurers rated lower than A- or not rated466 64 13.7 %
Pools379
 15
 4.0%Pools366 14 3.8 %
Structured settlements535
 15
 2.8%Structured settlements521 11 2.1 %
Captives2,647
 20
 0.8%Captives2,107 11 0.5 %
Other240
 69
 28.8%Other278 68 24.5 %
Total$15,497
 $316
 2.0%Total$15,906 $314 2.0 %

Largest Reinsurers
ABR Reinsurance Capital HoldingsHDI Group (Hannover Re)Munich Re GroupSwiss Re Group
Berkshire Hathaway Insurance GroupLloyd's of LondonPartner Re Group
ABR Reinsurance Capital HoldingsHDI Group (Hannover Re)Munich Re GroupSwiss Re Group
Berkshire Hathaway Insurance GroupLloyd's of LondonPartner Re Group

Categories of Chubb's reinsurersComprises:
Largest reinsurers• All groups of reinsurers or captives where the gross recoverable exceeds one percent of Chubb's total shareholders' equity.
Other reinsurers rated A- or better• All reinsurers rated A- or better that were not included in the largest reinsurer category.
Other reinsurers rated lower than A- or not rated• All reinsurers rated lower than A- or not rated that were not included in the largest reinsurer category.
Pools• Related to Chubb's voluntary pool participation and Chubb's mandatory pool participation required by law in certain states.
Structured settlements• Annuities purchased from life insurance companies to settle claims. Since we retain ultimate liability in the event that the life company fails to pay, we reflect the amounts as both a liability and a recoverable/receivable for GAAP purposes.
Captives• Companies established and owned by our insurance clients to assume a significant portion of their direct insurance risk from Chubb; structured to allow clients to self-insure a portion of their reinsurance risk. It generally is our policy to obtain collateral equal to expected losses. Where appropriate, exceptions are granted but only with review and approval at a senior officer level. Excludes captives included in the largest reinsurer category.
Other• Amounts recoverable that are in dispute or are from companies that are in supervision, rehabilitation, or liquidation.

The provisionvaluation allowance for uncollectible reinsurance is principally based on an analysis of the credit quality of the reinsurer and collateral balances. We establish the provisionvaluation allowance for uncollectible reinsurance for the Other category based on a case-by-case analysis of individual situations including the merits of the underlying matter, credit and collateral analysis, and consideration of our collection experience in similar situations.consideration.


F-38F-38


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries




c) Assumed life reinsurance programs involving minimum benefit guarantees under variable annuity contracts
The following table presents income and expenses relating to GMDB and GLB reinsurance. GLBs include GMIBs.
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
GMDB     
Net premiums earned$41
 $47
 $49
Policy benefits and other reserve adjustments$
 $20
 $40
GLB     
Net premiums earned$92
 $96
 $110
Policy benefits and other reserve adjustments122
 110
 105
Net realized gains (losses)(6) (250) 363
Gain (loss) recognized in Net income$(36) $(264) $368
Net cash received and other
 47
 65
Net decrease (increase) in liability$(36) $(311) $303


Net realized gains (losses) in the table above include gains (losses) related to foreign exchange and fair value adjustments on insurance derivatives and exclude gains (losses) on S&P futures used to partially offset the risk in the GLB reinsurance portfolio. Refer to Note 10 for additional information.
At December 31, 2019 and 2018, the reported liability for GMDB reinsurance was $83 million and $117 million, respectively. At December 31, 2019 and 2018, the reported liability for GLB reinsurance was $897 million and $861 million, respectively, which includes a fair value derivative adjustment of $456 million and $452 million, respectively. Reported liabilities for both GMDB and GLB reinsurance are determined using internal valuation models. Such valuations require considerable judgment and are subject to significant uncertainty. The valuation of these products is subject to fluctuations arising from, among other factors, changes in interest rates, changes in equity markets, changes in credit markets, changes in the allocation of the investments underlying annuitants’ account values, and assumptions regarding future policyholder behavior. These models and the related assumptions are regularly reviewed by management and enhanced, as appropriate, based upon improvements in modeling assumptions and availability of updated information, such as market conditions and demographics of in-force annuities.


F-39


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Variable Annuity Net Amount at Risk
The net amount at risk is defined as the present value of future claim payments assuming policy account values and guaranteed values are fixed at the valuation date (December 31, 2019 and 2018, respectively) and reinsurance coverage ends at the earlier of the maturity of the underlying variable annuity policy or the reinsurance treaty. In addition, the following assumptions were used:
(in millions of U.S. dollars, except for percentages) Net amount at risk   


Reinsurance covering
 December 31 2019
December 31 2018
2019 Future claims discount rateOther assumptions
Total claims at
100% mortality at
December 31, 2019
(1) 

GMDB Risk Only $256
$408
3.8% - 4.0%No lapses or withdrawals$167
     Mortality according to 100% of the Annuity 2000 mortality table 
GLB Risk Only $1,095
$1,233
4.0% - 4.3%No deaths, lapses or withdrawalsN/A
     
Annuitization at a frequency most disadvantageous to Chubb(2)
 
     Claim calculated using interest rates in line with rates used to calculate reserve 
Both Risks: (3)
GMDB$91
$103
4.0% - 4.3%No lapses or withdrawals$16
     Mortality according to 100% of the Annuity 2000 mortality table 
 GLB$415
$517
4.0% - 4.3%
Annuitization at a frequency most disadvantageous to Chubb(2)
N/A
     Claim calculated using interest rates in line with rates used to calculate reserve 
(1)
Takes into account all applicable reinsurance treaty claim limits.
(2)
Annuitization at a level that maximizes claims taking into account the treaty limits.
(3)
Covering both the GMDB and GLB risks on the same underlying policyholders.

The average attained age of all policyholders for all risk categories above, weighted by the guaranteed value of each reinsured policy, is approximately 72 years.

6. Goodwill and Other intangible assets

At both December 31, 2019 and 2018,Goodwill
The following table presents a roll-forward of Goodwill was $15.3 billion and by segment:
(in millions of U.S. dollars)North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal ReinsuranceLife InsuranceChubb Consolidated
Balance at December 31, 2018$6,946 $2,230 $134 $4,770 $371 $820 $15,271 
Foreign exchange revaluation and other15 (3)25 
Balance at December 31, 2019$6,955 $2,234 $134 $4,785 $371 $817 $15,296 
Acquisition of Banchile Seguros de Vida0 0 0 16 0 28 44 
Foreign exchange revaluation and other17 6 0 35 0 2 60 
Balance at December 31, 2020$6,972 $2,240 $134 $4,836 $371 $847 $15,400 

Other intangible assets
Other intangible assets at December 31, 2020 and 2019 were $6.1 billion. The majority of$5,811 million and $6,063 million, respectively, principally acquired from the Chubb Corp acquisition. Other intangible assets balance at both December 31,in 2020 and 2019 comprised $2,846 million and 2018 relates to the Chubb Corp acquisition and comprises of $3.2 billion$3,114 million, respectively, that are subject to amortization, principally agency distribution relationships and renewal rights, and $2.9 billion$2,965 million and $2,949 million, respectively, that are not subject to amortization, principally trademarks.

a) Goodwill
The following table presents a roll-forward of Goodwill by segment:
(in millions of U.S. dollars)North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 Global Reinsurance
 Life Insurance
 Chubb Consolidated
Balance at December 31, 2017$6,976
 $2,240
 $134
 $5,004
 $365
 $822
 $15,541
Foreign exchange revaluation and other(30) (10) 
 (234) 6
 (2) (270)
Balance at December 31, 2018$6,946
 $2,230
 $134

$4,770
 $371
 $820
 $15,271
Foreign exchange revaluation and other9
 4
 
 15
 
 (3) 25
Balance at December 31, 2019$6,955
 $2,234
 $134
 $4,785
 $371
 $817
 $15,296



F-40


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries




b) Other intangible assets
Amortization expense related to purchased intangibles werewas $290 million, $305 million, $339 million, and $260$339 million for the years ended December 31, 2020, 2019, 2018, and 2017,2018, principally related to agency distribution relationships and renewal rights.

The following table presents, as of December 31, 2019,2020, the expected estimated pre-tax amortization expense (benefit) of purchased intangibles, at current foreign currency exchange rates, for the next five years:
Associated with the Chubb Corp Acquisition
For the Years Ending December 31 (in millions of U.S. dollars)Agency
distribution relationships and renewal rights
Fair value adjustment on Unpaid losses and loss expense (1)
TotalOther intangible assetsTotal Amortization of purchased intangibles
2021$217 $(20)$197 $89 $286 
2022197 (14)183 101 284 
2023178 (7)171 96 267 
2024160 (6)154 90 244 
2025145 (6)139 89 228 
Total$897 $(53)$844 $465 $1,309 
 Associated with the Chubb Corp Acquisition     
For the Years Ending December 31 (in millions of U.S. dollars)Agency distribution relationships and renewal rights
 
Fair value adjustment on Unpaid losses and loss expense (1)

 Total
 
Other
intangible assets

 Total Amortization of purchased intangibles
2020$239
 $(35) $204
 $86
 $290
2021216
 (20) 196
 84
 280
2022196
 (14) 182
 93
 275
2023177
 (7) 170
 91
 261
2024159
 (5) 154
 85
 239
Total$987
 $(81) $906
 $439
 $1,345
(1)In connection with the Chubb Corp acquisition, we recorded an increase to Unpaid losses and loss expenses acquired to adjust the carrying value of Chubb Corp's historical Unpaid losses and loss expenses to fair value as of the acquisition date. This fair value adjustment amortizes through Amortization of purchased intangibles on the Consolidated statements of operations through the year 2032. The balance of the fair value adjustment on Unpaid losses and loss expense was $110 million and $145 million at December 31, 2020 and 2019, respectively. Refer to Note 1(h) for additional information.

(1)
In connection with the Chubb Corp acquisition, we recorded an increase to Unpaid losses and loss expenses acquired to adjust the carrying value of Chubb Corp's historical Unpaid losses and loss expenses to fair value as of the acquisition date. This fair value adjustment amortizes through Amortization of purchased intangibles on the Consolidated statements of operations through the year 2032. The balance of the fair value adjustment on Unpaid losses and loss expense was $145 million and $207 million at December 31, 2019 and 2018, respectively. Refer to Note 1(h) for additional information.

c) VOBA
The following table presents a roll-forward of VOBA:
(in millions of U.S. dollars)202020192018
Balance, beginning of year$306 $295 $326 
Amortization of VOBA (1)
(27)(24)(25)
Foreign exchange revaluation and other(16)35 (6)
Balance, end of year$263 $306 $295 
(in millions of U.S. dollars)2019
 2018
 2017
Balance, beginning of year$295
 $326
 $355
Acquisition of Banchile Seguros de Vida35
 
 
Amortization of VOBA (1)
(24) (25) (35)
Foreign exchange revaluation
 (6) 6
Balance, end of year$306
 $295
 $326
(1)(1)Recognized in Policy acquisition costs in the Consolidated statements of operations.
Recognized in Policy acquisition costs in the Consolidated statements of operations.

The following table presents, as of December 31, 2019, the expected estimated pre-tax amortization expense related to VOBA for the next five years:
For the Year Ending December 31VOBA
(in millions of U.S. dollars)
2020$26
202124
202222
202321
202419
Total$112



F-39

F-41


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries


The following table presents, as of December 31, 2020, the expected estimated pre-tax amortization expense related to VOBA for the next five years at current foreign exchange rates:
For the Years Ending December 31VOBA
(in millions of U.S. dollars)
2021$22 
202221 
202319 
202417 
202516 
Total$95 

7. Unpaid losses and loss expenses

Chubb establishes reserves for the estimated unpaid ultimate liability for losses and loss expenses under the terms of its policies and agreements. Reserves include estimates for both claims that have been reported and for IBNR claims, and include estimates of expenses associated with processing and settling these claims. Reserves are recorded in Unpaid losses and loss expenses in the consolidated balance sheets. While we believe that our reserves for unpaid losses and loss expenses at December 31, 20192020 are adequate, new information or trends may lead to future developments in incurred loss and loss expenses significantly greater or less than the reserves provided. Any such revisions could result in future changes in estimates of losses or reinsurance recoverable and would be reflected in our results of operations in the period in which the estimates are changed.
The following table presents a reconciliation of beginning and ending Unpaid losses and loss expenses:
Year Ended December 31
(in millions of U.S. dollars)202020192018
Gross unpaid losses and loss expenses, beginning of year$62,690 $62,960 $63,179 
Reinsurance recoverable on unpaid losses (1)
(14,181)(14,689)(14,014)
Net unpaid losses and loss expenses, beginning of year48,509 48,271 49,165 
Net losses and loss expenses incurred in respect of losses occurring in:
Current year22,124 19,575 19,048 
Prior years (2)
(414)(845)(981)
Total21,710 18,730 18,067 
Net losses and loss expenses paid in respect of losses occurring in:
Current year7,782 7,894 7,544 
Prior years9,652 10,579 10,796 
Total17,434 18,473 18,340 
Foreign currency revaluation and other379 (19)(621)
Net unpaid losses and loss expenses, end of year53,164 48,509 48,271 
Reinsurance recoverable on unpaid losses (1)
14,647 14,181 14,689 
Gross unpaid losses and loss expenses, end of year$67,811 $62,690 $62,960 
(1)     Net of valuation allowance for uncollectible reinsurance.
(2)    Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $19 million, $53 million, and $85 million for 2020, 2019, and 2018, respectively.
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Gross unpaid losses and loss expenses, beginning of year$62,960
 $63,179
 $60,540
Reinsurance recoverable on unpaid losses (1)
(14,689) (14,014) (12,708)
Net unpaid losses and loss expenses, beginning of year48,271
 49,165
 47,832
Net losses and loss expenses incurred in respect of losses occurring in:     
Current year19,575
 19,048
 19,391
Prior years (2)
(845) (981) (937)
Total18,730
 18,067
 18,454
Net losses and loss expenses paid in respect of losses occurring in:     
Current year7,894
 7,544
 6,575
Prior years10,579
 10,796
 10,873
Total18,473
 18,340
 17,448
Foreign currency revaluation and other(19) (621) 327
Net unpaid losses and loss expenses, end of year48,509
 48,271
 49,165
Reinsurance recoverable on unpaid losses (1)
14,181
 14,689
 14,014
Gross unpaid losses and loss expenses, end of year$62,690
 $62,960
 $63,179
(1)
Net of provision for uncollectible reinsurance.
(2)
Relates to prior period loss reserve development only and excludes prior period development related to reinstatement premiums, expense adjustments and earned premiums totaling $53 million, $85 million and $108 million for 2019, 2018, and 2017, respectively.

The increase in gross and net unpaid losses and loss expense in 2020 was driven by catastrophe losses incurred, principally from the COVID-19 pandemic. The increase in net unpaid losses and loss expense in 2019 reflected an increase in underlying reserves, offset by favorable prior period development and payments related to catastrophic events. The decrease in gross


F-40


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and net unpaid losses and loss expenses in 2018 was primarily driven by payments related to the 2017 catastrophic events, favorable prior period development and foreign exchange movement, partially offset by catastrophic events in 2018.Subsidiaries

The loss development tables under section c) below, present Chubb’s historical incurred and paid claims development by broad product line through December 31, 2019,2020, net of reinsurance, as well as the cumulative number of reported claims, IBNR balances, and other supplementary information.



F-42


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents a reconciliation of the loss development tables to the liability for unpaid losses and loss expenses in the consolidated balance sheet:
Reconciliation of Reserve Balances to Liability for Unpaid Loss and Loss Expenses
(in millions of U.S. dollars) December 31, 2019
Presented in the loss development tables:  
  North America Commercial P&C Insurance — Workers' Compensation $9,414
  North America Commercial P&C Insurance — Liability 16,447
  North America Commercial P&C Insurance — Other Casualty 1,913
  North America Commercial P&C Insurance — Non-Casualty 1,759
  North America Personal P&C Insurance 2,525
  Overseas General Insurance — Casualty 5,977
  Overseas General Insurance — Non-Casualty 2,377
  Global Reinsurance — Casualty 1,177
  Global Reinsurance — Non-Casualty 255
Excluded from the loss development tables:  
  Other 4,218
Net unpaid loss and allocated loss adjustment expense 46,062
Ceded unpaid loss and allocated loss adjustment expense:  
  North America Commercial P&C Insurance — Workers' Compensation $1,657
  North America Commercial P&C Insurance — Liability 5,400
  North America Commercial P&C Insurance — Other Casualty 546
  North America Commercial P&C Insurance — Non-Casualty 1,150
  North America Personal P&C Insurance 603
  Overseas General Insurance — Casualty 2,113
  Overseas General Insurance — Non-Casualty 1,263
  Global Reinsurance — Casualty 35
  Global Reinsurance — Non-Casualty 107
  Other 1,457
Ceded unpaid loss and allocated loss adjustment expense 14,331
Unpaid loss and loss expense on other than short-duration contracts (1)
 873
Unpaid unallocated loss adjustment expenses 1,424
Unpaid losses and loss expenses $62,690
Reconciliation of Reserve Balances to Liability for Unpaid Loss and Loss Expenses
(in millions of U.S. dollars)December 31, 2020
Presented in the loss development tables:
  North America Commercial P&C Insurance — Workers' Compensation$9,600
  North America Commercial P&C Insurance — Liability17,441
  North America Commercial P&C Insurance — Other Casualty2,124
  North America Commercial P&C Insurance — Non-Casualty2,491
  North America Personal P&C Insurance3,025
  Overseas General Insurance — Casualty6,832
  Overseas General Insurance — Non-Casualty2,725
  Global Reinsurance — Casualty1,200
  Global Reinsurance — Non-Casualty312
Excluded from the loss development tables:
  Other4,742
Net unpaid loss and allocated loss adjustment expense50,492
Ceded unpaid loss and allocated loss adjustment expense:
  North America Commercial P&C Insurance — Workers' Compensation$1,461
  North America Commercial P&C Insurance — Liability5,743
  North America Commercial P&C Insurance — Other Casualty564
  North America Commercial P&C Insurance — Non-Casualty1,380
  North America Personal P&C Insurance141
  Overseas General Insurance — Casualty2,426
  Overseas General Insurance — Non-Casualty1,686
  Global Reinsurance — Casualty29
  Global Reinsurance — Non-Casualty104
  Other1,153
Ceded unpaid loss and allocated loss adjustment expense14,687
(1)Unpaid loss and loss expense on other than short-duration contracts (1)
Primarily includes the claims reserve of our International A&H business1,109
Unpaid unallocated loss adjustment expenses1,523
Unpaid losses and Life Insurance segment reserves.loss expenses$67,811

(1)     Primarily includes the claims reserve of our International A&H business and Life Insurance segment reserves.


F-43F-41


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Business excluded from the loss development tables
“Other” shown in the reconciliation table above comprises businesses excluded from the loss development tables below:tables:
North America Agricultural Insurance segment business, which is short-tailed with the majority of the liabilities expected to be resolved in the ensuing twelve months;
Corporate, segment business, which includes run-off liabilities such as asbestos and environmental and other mass tort exposures and which impact accident years older than those shown in the exhibitsloss development tables below;
Life Insurance segment business, which is generally written using long-duration contracts; and
Certain subsets of our business due to data limitations or unsuitability to the loss development table presentation, including:
We underwrite loss portfolio transfers at various times; by convention, all premium and losses associated with these transactions are recorded to the policy period of the transaction, even though the accident dates of the claims covered may be a decade or more in the past. We also underwrite certain high attachment, high limit, multiple-line and excess of aggregate coverages for large commercial clients. Changes in incurred loss and cash flow patterns are volatile and sufficiently different from those of typical insureds. This category includes the loss portfolio transfer of Fireman’s Fund personal lines run-off liabilities and Alternative Risk Solutions business within the North America Commercial P&C segment;
2015 and prior paid history on a subset of previously acquired international businesses, within the Overseas General Insurance segment, due to limitations on the data prior to the acquisition;
Reinsurance recoverable bad debt;
Purchase accounting adjustments related to unpaid losses and loss expenses for Chubb Corp.
We underwrite loss portfolio transfers at various times; by convention, all premium and losses associated with these transactions are recorded to the policy period of the transaction, even though the accident dates of the claims covered may be a decade or more in the past. We also underwrite certain high attachment, high limit, multiple-line and excess of aggregate coverages for large commercial clients. Changes in incurred loss and cash flow patterns are volatile and sufficiently different from those of typical insureds. This category includes the loss portfolio transfer of Fireman’s Fund personal lines run-off liabilities and Alternative Risk Solutions business within the North America Commercial P&C Insurance segment;
2015 and prior paid history on a subset of previously acquired international businesses, within the Overseas General Insurance segment, due to limitations on the data prior to the acquisition;
Reinsurance recoverable bad debt; and
Purchase accounting adjustments related to unpaid losses and loss expenses for Chubb Corp.

a) Description of Reserving Methodologies
Our recorded reserves represent management's best estimate of the provision for unpaid claims as of the balance sheet date. The process of establishing loss and loss expense reserves can be complex and is subject to considerable uncertainty as it requires the use of estimates and judgments based on circumstances underlying the insured loss at the date of accrual. The reserves for our various product lines each require different qualitative and quantitative assumptions and judgments to be made. Management's best estimate is developed after collaboration with actuarial, underwriting, claims, legal, and finance departments and culminates with the input of reserve committees. Each business unit reserve committee includes the participation of the relevant parties from actuarial, finance, claims, and unit senior management and has the responsibility for finalizing, recommending and approving the estimate to be used as management's best estimate. Reserves are further reviewed by Chubb's Chief Actuary and senior management. The objective of such a process is to determine a single estimate that we believe represents a better estimate than any other and which is viewed by management to be the best estimate of ultimate loss settlements.

This estimate is based on a combination of exposure and experience-based actuarial methods (described below) and other considerations such as claims reviews, reinsurance recovery assumptions and/or input from other knowledgeable parties such as underwriting. Exposure-based methods are most commonly used on relatively immature origin years (i.e., the year in which the losses were incurred — “accident year” or “report year”), while experience-based methods provide a view based on the projection of loss experience that has emerged as of the valuation date. Greater reliance is placed upon experience-based methods as the pool of emerging loss experience grows and where it is deemed sufficiently credible and reliable as the basis for the estimate. In comparing the held reserve for any given origin year to the actuarial projections, judgment is required as to the credibility, uncertainty and inherent limitations of applying actuarial techniques to historical data to project future loss experience. Examples of factors that impact such judgments include, but are not limited to, the following:

nature and complexity of underlying coverage provided and net limits of exposure provided;
segmentation of data to provide sufficient homogeneity and credibility for loss projection methods;
extent of credible internal historical loss data and reliance upon industry information as required;
historical variability of actual loss emergence compared with expected loss emergence;
reported and projected loss trends;
extent of emerged loss experience relative to the remaining expected period of loss emergence;
rate monitor information for new and renewal business;
changes in claims handling practice;
inflation;
the legal environment;
facts and circumstances of large claims;
terms and conditions of the contracts sold to our insured parties;
impact of applicable reinsurance recoveries; and
nature and extent of underlying assumptions.


F-44F-42


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries




We have actuarial staff within each of our business units who analyze loss reserves (including loss expenses) and regularly project estimates of ultimate losses and the corresponding indications of the required IBNR reserve. Our reserving approach is a comprehensive ground-up process using data at a detailed level that reflects the specific types and coverages of the diverse products written by our various operations. The data presented in this disclosure was prepared on a more aggregated basis and with a focus on changes in incurred loss estimates over time as well as associated cash flows. We note that data prepared on this basis may not demonstrate the full spectrum of characteristics that are evident in the more detailed level studied internally.

We perform an actuarial reserve review for each product line at least once a year. For most product lines, one or more standard actuarial reserving methods may be used to determine estimates of ultimate losses and loss expenses, and from these estimates, a single actuarial central estimate is selected. The actuarial central estimate is an input to the reserve committee process described above. For the few product lines that do not lend themselves to standard actuarial reserving methods, appropriate techniques are applied to produce the actuarial central estimates. For example, run-off asbestos and environmental liability estimates are better suited to the application of account-specific exposure-based analyses to best evaluate their associated aggregate reserve levels.

b) Standard actuarial reserving methods
The judgments involved in projecting the ultimate losses include the use and interpretation of various standard actuarial reserving methods that place reliance on the extrapolation of actual historical data, loss development patterns, industry data, and other benchmarks as appropriate.

Standard actuarial reserving methods include, but are not limited to, expected loss ratio, paid and reported loss development, and Bornhuetter-Ferguson methods. A general description of these methods is provided below. In addition to these standard methods, depending upon the product line characteristics and available data, we may use other recognized actuarial methods and approaches. Implicit in the standard actuarial methods that we generally utilize is the need for two fundamental assumptions: first, the pattern by which losses are expected to emerge over time for each origin year, and second the expected loss ratio for each origin year.

The expected loss ratio for any particular origin year is selected after consideration of a number of factors, including historical loss ratios adjusted for rate changes, premium and loss trends, industry benchmarks, the results of policy level loss modeling at the time of underwriting, and/or other more subjective considerations for the product line (e.g., terms and conditions) and external environment as noted above. The expected loss ratio for a given origin year is initially established at the start of the origin year as part of the planning process. This analysis is performed in conjunction with underwriters and management. The expected loss ratio method arrives at an ultimate loss estimate by multiplying the expected ultimate loss ratio by the corresponding premium base. This method is most commonly used as the basis for the actuarial central estimate for immature origin periods on product lines where the actual paid or reported loss experience is not yet deemed sufficiently credible to serve as the principal basis for the selection of ultimate losses. The expected loss ratio for a given origin year may be modified over time if the underlying assumptions differ from the original assumptions (e.g., the assessment of prior year loss ratios, loss trend, rate changes, actual claims, or other information).

Our selected paid and reported development patterns provide a benchmark against which the actual emerging loss experience can be monitored. Where possible, development patterns are selected based on historical loss emergence by origin year. For product lines where the historical data is viewed to have low statistical credibility, the selected development patterns also reflect relevant industry benchmarks and/or experience from similar product lines written elsewhere within Chubb. This most commonly occurs for relatively new product lines that have limited historical data or for high severity/low frequency portfolios where our historical experience exhibits considerable volatility and/or lacks credibility. The paid and reported loss development methods convert the selected loss emergence pattern to a set of multiplicative factors which are then applied to actual paid or reported losses to arrive at an estimate of ultimate losses for each period. Due to their multiplicative nature, the paid and reported loss development methods will leverage differences between actual and expected loss emergence. These methods tend to be utilized for more mature origin periods and for those portfolios where the loss emergence has been relatively consistent over time.

The Bornhuetter-Ferguson method is a combination of the expected loss ratio method and the loss development method, where the loss development method is given more weight as the origin year matures. This approach allows a logical transition between the expected loss ratio method which is generally utilized at earlier maturities and the loss development methods which are typically utilized at later maturities. We usually apply this method using reported loss data although paid data may also be used.


F-45F-43


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries




Short-tail business
Short-tail business generally describes product lines for which losses are typically known and paid shortly after the loss actually occurs. This would include, for example, most property, personal accident, and automobile physical damage policies that we write. Due to the short reporting and development pattern for these product lines, the uncertainty associated with our estimate of ultimate losses for any particular accident period diminishes relatively quickly as actual loss experience emerges. We typically assign credibility to methods that incorporate actual loss emergence, such as the paid and reported loss development and Bornhuetter-Ferguson methods, sooner than would be the case for long-tail lines at a similar stage of development for a given origin year. The reserving process for short-tail losses arising from catastrophic events typically involves an assessment by the claims department, in conjunction with underwriters and actuaries, of our exposure and estimated losses immediately following an event and then subsequent revisions of the estimated losses as our insureds provide updated actual loss information.

Long-tail business
Long-tail business describes lines of business for which specific losses may not be known/reported for some period and for which claims can take significant time to settle/close. This includes most casualty lines such as general liability, D&O, and workers' compensation. There are various factors contributing to the uncertainty and volatility of long-tail business. Among these are:

The nature and complexity of underlying coverage provided and net limits of exposure provided;
Our historical loss data and experience is sometimes too immature and lacking in credibility to rely upon for reserving purposes. Where this is the case, in our reserve analysis we may utilize industry loss ratios or industry benchmark development patterns that we believe reflect the nature and coverage of the underwritten business and its future development, where available. For such product lines, actual loss experience may differ from industry loss statistics as well as loss experience for previous underwriting years;
The difficulty in estimating loss trends, claims inflation (e.g., medical and judicial) and underlying economic conditions;
The need for professional judgment to estimate loss development patterns beyond that represented by historical data using supplemental internal or industry data, extrapolation, or a blend of both;
The need to address shifts in business mix or volume over time when applying historical paid and reported loss development patterns from older origin years to more recent origin years. For example, changes over time in the processes and procedures for establishing case reserves can distort reported loss development patterns or changes in ceded reinsurance structures by origin year can alter the development of paid and reported losses;
Loss reserve analyses typically require loss or other data be grouped by common characteristics in some manner. If data from two combined lines of business exhibit different characteristics, such as loss payment patterns, the credibility of the reserve estimate could be affected. Additionally, since casualty lines of business can have significant intricacies in the terms and conditions afforded to the insured, there is an inherent risk as to the homogeneity of the underlying data used in performing reserve analyses; and
The applicability of the price change data used to estimate ultimate loss ratios for most recent origin years.

As described above, various factors are considered when determining appropriate data, assumptions, and methods used to establish the loss reserve estimates for long-tail product lines. These factors may also vary by origin year for given product lines. The derivation of loss development patterns from data and the selection of a tail factor to project ultimate losses from actual loss emergence require considerable judgment, particularly with respect to the extent to which historical loss experience is relied upon to support changes in key reserving assumptions.

c) Loss Development Tables
The tables were designed to present business with similar risk characteristics which exhibit like development patterns and generally similar trends, in order to provide insight into the nature, amount, timing and uncertainty of cash flows related to our claims liabilities.

Each table follows a similar format and reflects the following:

The incurred loss triangle includes both reported case reserves and IBNR liabilities.
Both the incurred and paid loss triangles include allocated loss adjustment expense (i.e., defense and investigative costs particular to individual claims) but exclude unallocated loss adjustment expense (i.e., the costs associated with internal claims staff and third-party administrators).
The amounts in both triangles for the years ended December 31, 2011 to December 31, 2019 and average historical claim duration as of December 31, 2020, are presented as supplementary information.
All data presented in the triangles is net of reinsurance recoverables.
The IBNR reserves shown to the right of each incurred loss development exhibit reflect the net IBNR recorded as of December 31, 2020.December 31, 2010, to December 31, 2018 and average historical claim duration as of December 31, 2019, are presented as supplementary information.


F-46F-44


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



All data presented in the triangles is net of reinsurance recoverables.
The IBNR reserves shown to the right of each incurred loss development exhibit reflect the net IBNR recorded as of December 31, 2019.
The tables are presented retrospectively with respect to acquisitions where these are material and doing so is practicable. Most notably, the Chubb Corp acquisition is presented retrospectively. The unaudited consolidated data is presented solely for informational purposes and is not necessarily indicative of the consolidated data that might have been observed had the transactions been completed prior to the date indicated.

Historical dollar amounts are presented in this footnote on a constant-dollar basis, which is achieved by assuming constant foreign exchange rates for all periods in the loss triangles, translating prior period amounts using the same local currency exchange rates as the current year end. The impact of this conversion is to show the change between periods exclusive of the effect of fluctuations in exchange rates, which would otherwise distort the change in incurred loss and cash flow patterns shown. The change in incurred loss shown will differ from other GAAP disclosures of incurred prior period reserve development amounts, which include the effect of fluctuations in exchanges rates.

We provided guidance above on key assumptions that should be considered when reviewing this disclosure and information relating to how loss reserve estimates are developed. We believe the information provided in the “Loss Development Tables” section of the disclosure is of limited use for independent analysis or application of standard actuarial estimations.

Cumulative Number of Reported Claims
Reported claim counts, on a cumulative basis, are provided to the far right of each incurred loss development table. WeIn our North America segments, we generally consider a reported claim to be one claim per coverage per claimant. For our North America segments, we refined our claim count methodology in 2020 for our U.S. operations. For workers' compensation, we moved from including losses below the deductible in our reported claims to excluding them. This reduction in reported claims aligns claim counts to the portion of the claims to which Chubb has incurred losses, which we view as a more meaningful presentation. For non-casualty, personal and liability, we aligned our claim count methodology to reflect a reported claim per claimant, per coverage basis, and including all reported claims with either an indemnity or expense transaction. These changes resulted in fewer reported claims in non-casualty and additional reported claims in personal and liability. In our Overseas General Insurance segment, we generally consider a reported claim to be on a per occurrence basis. Global Reinsurance segment’s portfolio comprises a mix of proportional and non-proportional treaties. The proportional treaties are reported on a bulk basis and do not lend themselves to meaningful claim count data. As such, we do not provide claim count information for our Global Reinsurance segment.

We exclude claims closed without payment. Claims are counted on a direct basis without consideration of ceded reinsurance. Use of the presented claim counts in analysis of company experience has significant limitations, including:

High deductible workers' compensation claim counts include claims below the applicable policy deductible.
Professional liability and certain other lines have a high proportion of claims reported which will be closed without any payment; shifts in total reported counts may not meaningfully impact reported and ultimate loss experience.
Claims for certain events and/or product lines, such as portions of assumed reinsurance andour A&H business, are not reported on an individual basis, but rather in bulk and thus not available for inclusion in this disclosure.
Each of the segments belowsegment typically has a mixture of primary and excess experience which has shifted over time.

Captive business, especially in Workers' Compensation and Liability, largely represents fronted business where our net exposure to loss is minimal; however, since the claim count is based on direct claims, there is a mismatch between direct claims and net loss dollars, the extent of which varies by accident year.

Reported claim counts include open claims which have case reserves andbut exclude claims that have been incurred but not reported. As such the reported claims are not consistent with the incurred losses in the triangle, which include incurred but not reported losses. One can calculate reported losses which can be calculated by subtracting incurred but not reported losses from incurred losses.losses in the triangle. Reported claim counts are inconsistent with losses in the incurred loss triangle, which include incurred but not reported losses, and are also inconsistent with losses in the paid loss triangle, which excludesince reported counts would include claims with case reserves.reserves but no payments to date.

North America Commercial P&C Insurance — Workers' Compensation — Long-tail
This product line has a substantial geographic spread and a broad mix across industries. Types of coverage include risk management business predominantly with high deductible policies, loss sensitive business (i.e., retrospectively-rated policies), business fronted for captives, as well as excess and primary guaranteed cost coverages.

The triangle below shows all loss and allocated expense development for the workers' compensation product line. In our prior period development disclosure, we exclude any loss development where there is a directly related premium adjustment. For workers' compensation, changes in the exposure base due to payroll audits will drive changes in ultimate losses. In addition, we record involuntary pool assumptions (premiums and losses) on a lagged basis. Both of these items will influence the development in the triangle, particularly the first prior accident year, and are included in the reconciliation table presented on page F-60.


F-58.

F-47F-45


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



North America Commercial P&C Insurance — Workers' Compensation — Long-tail (continued)
Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31 As of December 31 2020
(in millions of U.S. dollars)UnauditedNet IBNR Reserves
Reported Claims (in thousands)
Accident Year2011201220132014201520162017201820192020
2011$1,037 $1,030 $1,046 $1,049 $1,053 $1,022 $1,012 $1,009 $988 $973 $208 45 
20121,050 1,011 1,030 1,040 1,011 989 986 977 953 234 44 
20131,109 1,108 1,122 1,127 1,086 1,073 1,037 1,014 280 43 
20141,207 1,201 1,217 1,215 1,163 1,100 1,073 347 45 
20151,282 1,259 1,276 1,279 1,217 1,154 419 50 
20161,367 1,361 1,383 1,378 1,269 530 51 
20171,413 1,380 1,399 1,393 723 50 
20181,359 1,361 1,379 709 51 
20191,391 1,384 767 47 
20201,367 1,086 24 
Total$11,959 
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$119 $294 $411 $484 $533 $567 $595 $616 $640 $654 
2012111 271 365 436 486 532 574 592 612 
2013107 286 422 506 553 587 616 633 
2014113 295 410 484 532 566 599 
2015116 301 418 501 564 606 
2016122 326 452 529 584 
2017120 313 437 516 
2018130 329 451 
2019143 341 
2020111 
Total$5,107 
North America Commercial P&C Insurance — Workers' Compensation — Long-tail (continued)  
Net Incurred Loss and Allocated Loss Adjustment Expenses    
 Years Ended December 31   As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$1,049
 $1,037
 $1,050
 $1,065
 $1,064
 $1,052
 $1,028
 $1,020
 $1,018
 $999
 $223
 303
2011  1,037
 1,030
 1,046
 1,049
 1,053
 1,022
 1,012
 1,009
 988
 233
 286
2012    1,050
 1,011
 1,030
 1,040
 1,011
 989
 986
 977
 275
 287
2013      1,109
 1,108
 1,122
 1,127
 1,086
 1,073
 1,037
 309
 299
2014        1,207
 1,201
 1,217
 1,215
 1,163
 1,100
 395
 336
2015          1,282
 1,259
 1,276
 1,279
 1,217
 500
 334
2016            1,366
 1,361
 1,383
 1,378
 673
 304
2017              1,412
 1,380
 1,399
 783
 339
2018                1,359
 1,360
 788
 362
2019                  1,391
 997
 246
Total                  $11,846
    
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$2,748
Accident years 2011 - 2020 from tables above6,852
All Accident years$9,600
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$(94)
Accident years 2011 - 2020 from tables above(256)
All Accident years$(350)
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage10 %16 %10 %%%%%%%%

Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $123
 $300
 $411
 $493
 $551
 $592
 $617
 $641
 $666
 $684
2011   119
 294
 411
 484
 533
 567
 595
 616
 640
2012     111
 271
 365
 436
 486
 532
 574
 592
2013       107
 286
 422
 506
 553
 587
 616
2014         113
 295
 410
 484
 532
 566
2015           116
 301
 418
 501
 564
2016             122
 326
 452
 529
2017               120
 313
 437
2018                 130
 329
2019                   143
Total                   $5,100

Net Liabilities for Loss and Allocated Loss Adjustment Expenses  
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $2,668
All Accident years $9,414

F-
46
Supplementary Information: (Favorable)/ Adverse Prior Period Development  
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $(93)
All Accident years $(288)


Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage10% 16% 10% 7% 5% 4% 3% 2% 2% 2%



F-48


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries





North America Commercial P&C Insurance — Liability — Long-tail
This line consists of primary and excess liability exposures, including medical liability and professional lines, including directors and officers (D&O) liability, errors and omissions (E&O) liability, employment practices liability (EPL), fidelity bonds, and fiduciary liability.

The primary and excess liability business represents the largest part of these exposures. The former includes both monoline and commercial package liability. The latter includes a substantial proportion of commercial umbrella, excess and high excess business, where loss activity can produce significant volatility in the loss triangles at later ages within an accident year (and sometimes across years) due to the size of the limits afforded and the complex nature of the underlying losses.

This line includes management and professional liability products provided to a wide variety of clients, from national accounts to small firms along with private and not-for-profit organizations, distributed through brokers, agents, wholesalers and MGAs. Many of these coverages, particularly D&O and E&O, are typically written on a claims-made form. While most of the coverages are underwritten on a primary basis, there are significant amounts of excess exposure with large policy limits.
Net Incurred Loss and Allocated Loss Adjustment Expenses    
 Years Ended December 31  As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$3,574
 $3,579
 $3,597
 $3,556
 $3,416
 $3,247
 $3,125
 $3,105
 $2,993
 $2,983
 $202
 18
2011  3,496
 3,582
 3,626
 3,660
 3,590
 3,494
 3,380
 3,312
 3,190
 299
 18
2012    3,548
 3,624
 3,609
 3,560
 3,520
 3,422
 3,326
 3,231
 430
 18
2013      3,543
 3,538
 3,538
 3,528
 3,426
 3,212
 3,118
 500
 17
2014        3,532
 3,582
 3,671
 3,713
 3,652
 3,467
 792
 17
2015          3,556
 3,705
 3,814
 3,971
 3,939
 1,232
 19
2016            3,530
 3,591
 3,688
 3,801
 1,279
 20
2017              3,319
 3,495
 3,577
 1,818
 21
2018                3,371
 3,490
 2,170
 24
2019                  3,449
 3,005
 25
Total                  $34,245
    


Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31 2020
(in millions of U.S. dollars)UnauditedNet IBNR Reserves
Reported Claims (in thousands)
Accident Year2011201220132014201520162017201820192020
2011$3,500 $3,586 $3,630 $3,665 $3,593 $3,498 $3,384 $3,316 $3,193 $3,143 $226 25 
20123,552 3,628 3,613 3,565 3,524 3,426 3,331 3,235 3,235 353 25 
20133,547 3,542 3,543 3,533 3,430 3,216 3,122 2,964 317 25 
20143,535 3,586 3,674 3,717 3,656 3,470 3,346 572 25 
20153,560 3,709 3,819 3,976 3,943 3,736 855 27 
20163,534 3,595 3,692 3,805 3,799 962 27 
20173,322 3,499 3,581 3,631 1,475 27 
20183,375 3,494 3,696 1,737 28 
20193,452 3,628 2,381 28 
20204,098 3,695 24 
Total$35,276 
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$160 $652 $1,209 $1,805 $2,214 $2,477 $2,659 $2,741 $2,827 $2,863 
2012166 656 1,172 1,680 2,092 2,326 2,502 2,619 2,688 
2013130 548 1,192 1,597 2,007 2,232 2,374 2,465 
2014164 679 1,250 1,804 2,202 2,442 2,584 
2015138 605 1,206 1,856 2,291 2,533 
2016171 663 1,336 1,975 2,334 
2017161 617 1,162 1,701 
2018190 754 1,303 
2019176 671 
2020152 
Total$19,294 

F-49F-47


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



North America Commercial P&C Insurance — Liability — Long-tail (continued)

Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $126
 $611
 $1,108
 $1,558
 $1,892
 $2,257
 $2,424
 $2,525
 $2,659
 $2,716
2011   160
 651
 1,208
 1,803
 2,212
 2,474
 2,657
 2,738
 2,824
2012     166
 655
 1,171
 1,678
 2,090
 2,324
 2,499
 2,615
2013       130
 547
 1,191
 1,595
 2,005
 2,230
 2,371
2014         164
 679
 1,249
 1,802
 2,200
 2,440
2015           138
 605
 1,205
 1,854
 2,289
2016             171
 662
 1,335
 1,974
2017               161
 616
 1,161
2018                 189
 754
2019                   176
Total                   $19,320
Net Liabilities for Loss and Allocated Loss Adjustment Expenses

(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $1,522
All Accident years $16,447


North America Commercial P&C Insurance — Liability — Long-tail (continued)
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$1,459
Accident years 2011 - 2020 from tables above15,982
All Accident years$17,441
Supplementary Information: (Favorable)/ Adverse Prior Period Development


(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $(49)
All Accident years $(273)
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$(176)
Accident years 2011 - 2020 from tables above(117)
All Accident years$(293)
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage%14 %17 %16 %12 %%%%%%


Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage5% 14% 17% 16% 12% 8% 5% 3% 4% 2%



North America Commercial P&C Insurance — Other Casualty — Long-tail
This product line consists of the remaining commercial casualty coverages such as automobile liability and aviation. There is also a small portion of commercial multi-peril (CMP) business in accident years 2014 and prior. The paid and reported data are impacted by some catastrophe loss activity primarily on the CMP exposures just noted.

Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31 2020
(in millions of U.S. dollars)UnauditedNet IBNR Reserves
Reported Claims (in thousands)
Accident Year2011201220132014201520162017201820192020
2011$581 $590 $581 $549 $533 $525 $517 $511 $513 $503 $13 16 
2012634 606 577 561 520 519 509 507 505 2 16 
2013527 531 523 516 469 462 462 458 21 18 
2014595 583 581 597 555 539 539 25 17 
2015487 470 502 515 458 455 35 15 
2016504 502 527 524 481 61 16 
2017532 566 577 616 118 17 
2018536 564 575 198 17 
2019606 637 284 16 
2020646 517 9 
Total$5,415 

F-50F-48


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



North America Commercial P&C Insurance — Other-Casualty — Long-tail (continued)
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$86 $235 $341 $400 $437 $461 $466 $480 $486 $486 
201269 223 320 387 435 470 487 493 502 
201369 197 271 348 385 411 419 426 
201480 220 318 391 455 474 501 
201547 137 215 305 371 395 
201652 146 246 323 374 
201766 175 313 381 
201874 169 270 
201970 190 
202053 
Total$3,578 
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$287
Accident years 2011 - 2020 from tables above1,837
All Accident years$2,124
North America Commercial P&C Insurance — Other-Casualty — Long-tail (continued)

  
Net Incurred Loss and Allocated Loss Adjustment Expenses    
 Years Ended December 31  As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$613
 $607
 $601
 $546
 $506
 $478
 $480
 $493
 $484
 $481
 $16
 15
2011  580
 589
 581
 548
 533
 524
 516
 510
 512
 24
 15
2012    633
 605
 577
 560
 520
 519
 508
 507
 3
 15
2013      526
 530
 522
 515
 468
 462
 461
 29
 17
2014        594
 583
 581
 596
 555
 538
 45
 17
2015          486
 470
 501
 515
 458
 51
 15
2016            504
 502
 527
 524
 136
 15
2017              531
 566
 577
 174
 16
2018                535
 563
 298
 15
2019                  606
 428
 14
Total                  $5,227
    
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$23
Accident years 2011 - 2020 from tables above19
All Accident years$42
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage12 %23 %19 %14 %10 %%%%%%
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $97
 $236
 $322
 $363
 $392
 $433
 $443
 $449
 $453
 $452
2011   86
 235
 341
 400
 437
 461
 466
 480
 486
2012     69
 222
 319
 386
 435
 470
 486
 493
2013       69
 197
 270
 348
 385
 411
 418
2014         80
 220
 317
 391
 454
 473
2015           47
 137
 214
 304
 370
2016             52
 145
 246
 323
2017               66
 175
 312
2018                 74
 169
2019                   70
Total                   $3,566
Net Liabilities for Loss and Allocated Loss Adjustment Expenses

(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $252
All Accident years $1,913

Supplementary Information: (Favorable)/ Adverse Prior Period Development

(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $5
All Accident years $(36)

Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage14% 24% 19% 14% 9% 6% 2% 2% 1%  %

F-
49



F-51


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries




North America Commercial P&C Insurance — Non-Casualty — Short-tail
This product line represents first party commercial product lines that are short-tailed in nature, such as property, inland marine, ocean marine, surety and A&H. There is a wide diversity of products, primary and excess coverages, and policy sizes. During this ten-year period, this product line was also impacted by natural catastrophes mainly in the 2012, 2017, and 2018 accident years.
Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31 2020
(in millions of U.S. dollars)UnauditedNet IBNR Reserves
Reported Claims (in thousands)
Accident Year2011201220132014201520162017201820192020
2011$1,960 $1,934 $1,877 $1,856 $1,835 $1,840 $1,835 $1,835 $1,835 $1,833 $4 416 
20122,033 1,916 1,883 1,864 1,859 1,847 1,844 1,850 1,844 (8)426 
20131,434 1,424 1,337 1,360 1,340 1,340 1,338 1,344 7 455 
20141,643 1,661 1,579 1,559 1,549 1,550 1,558 10 483 
20151,736 1,745 1,650 1,638 1,605 1,589 (1)545 
20161,911 1,890 1,799 1,782 1,818 32 650 
20172,704 2,608 2,505 2,522 51 763 
20182,053 2,240 2,175 71 901 
20192,052 2,037 166 1,036 
20203,150 1,061 927 
Total$19,870 
Net Incurred Loss and Allocated Loss Adjustment Expenses    
Net Cumulative Paid Loss and Allocated Loss Adjustment ExpensesNet Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31  As of December 31 2019 Years Ended December 31
(in millions of U.S. dollars)(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

(in millions of U.S. dollars)Unaudited
Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 Accident Year2011201220132014201520162017201820192020
2010$1,501
 $1,537
 $1,461
 $1,424
 $1,422
 $1,415
 $1,410
 $1,404
 $1,394
 $1,394
 $1
 1,057
2011  1,958
 1,932
 1,875
 1,853
 1,833
 1,837
 1,832
 1,832
 1,833
 10
 1,051
2011$939 $1,574 $1,718 $1,777 $1,787 $1,811 $1,816 $1,821 $1,825 $1,830 
2012    2,030
 1,913
 1,880
 1,861
 1,856
 1,844
 1,841
 1,847
 3
 1,035
2012715 1,577 1,698 1,767 1,795 1,822 1,816 1,842 1,844 
2013      1,430
 1,420
 1,333
 1,356
 1,337
 1,337
 1,334
 3
 1,072
2013651 1,138 1,238 1,285 1,311 1,324 1,333 1,335 
2014        1,642
 1,658
 1,576
 1,555
 1,546
 1,547
 7
 1,100
2014820 1,374 1,484 1,506 1,532 1,546 1,554 
2015          1,733
 1,742
 1,647
 1,635
 1,602
 17
 1,170
2015727 1,343 1,488 1,556 1,572 1,574 
2016            1,907
 1,887
 1,797
 1,778
 16
 1,291
2016846 1,504 1,656 1,733 1,761 
2017              2,701
 2,605
 2,503
 71
 1,374
2017979 2,087 2,303 2,394 
2018                2,050
 2,237
 182
 1,551
20181,027 1,825 2,018 
2019                  2,049
 587
 1,446
20191,030 1,677 
202020201,396 
Total                  $18,124
    Total$17,383 
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$4
Accident years 2011 - 2020 from tables above2,487
All Accident years$2,491
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$2
Accident years 2011 - 2020 from tables above(37)
All Accident years$(35)

Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $723
 $1,222
 $1,320
 $1,357
 $1,382
 $1,391
 $1,394
 $1,395
 $1,391
 $1,391
2011   938
 1,571
 1,715
 1,775
 1,785
 1,808
 1,813
 1,819
 1,822
2012     713
 1,575
 1,696
 1,764
 1,792
 1,819
 1,813
 1,839
2013       649
 1,135
 1,234
 1,282
 1,308
 1,321
 1,329
2014         818
 1,370
 1,481
 1,502
 1,528
 1,543
2015           725
 1,341
 1,486
 1,554
 1,570
2016             845
 1,502
 1,653
 1,729
2017               978
 2,085
 2,301
2018                 1,026
 1,823
2019                   1,029
Total                   $16,376
F-50



F-52


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



North America Commercial P&C Insurance — Non-Casualty — Short-tail (continued)

  
Net Liabilities for Loss and Allocated Loss Adjustment Expenses

  
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $11
All Accident years $1,759


North America Commercial P&C Insurance — Non-Casualty — Short-tail (continued)
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage46 %38 %%%%%%%%%

Supplementary Information: (Favorable)/ Adverse Prior Period Development  
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $(6)
All Accident years $32


Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage47% 39% 8% 3% 1% 1% % 1%  % %


North America Personal P&C Insurance — Short-tail
Chubb provides personal lines coverages for high-net-worth individuals and families in North America including homeowners, automobile, valuable articles (including fine art), umbrella liability, and recreational marine insurance offered through independent regional agents and brokers. A portfolio acquired from Fireman’s Fund is presented on a prospective basis beginning in May of accident year 2015. Reserves associated with prior accident periods were acquired through a loss portfolio transfer, which does not allow for a retrospective presentation. During this ten-year period, this segment was also impacted by natural catastrophes, mainly in 2012, 2017 and 2018 accident years.
Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31 2020
(in millions of U.S. dollars)UnauditedNet IBNR Reserves
Reported Claims (in thousands)
Accident Year2011201220132014201520162017201820192020
2011$2,208 $2,210 $2,185 $2,173 $2,164 $2,161 $2,160 $2,158 $2,159 $2,157 $7 179 
20122,185 2,183 2,183 2,191 2,186 2,186 2,189 2,194 2,190 18 188 
20131,860 1,888 1,897 1,900 1,924 1,937 1,945 1,948 26 132 
20142,205 2,206 2,192 2,146 2,160 2,147 2,141 14 144 
20152,494 2,550 2,561 2,544 2,563 2,570 21 148 
20162,440 2,535 2,545 2,482 2,471 45 154 
20173,035 3,069 3,002 2,998 96 163 
20183,010 3,037 3,103 244 169 
20192,957 2,993 329 155 
20202,931 1,119 100 
Total$25,502 
Net Incurred Loss and Allocated Loss Adjustment Expenses    
 Years Ended December 31  As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$1,868
 $1,876
 $1,853
 $1,835
 $1,832
 $1,828
 $1,823
 $1,820
 $1,821
 $1,820
 $6
 146
2011  2,205
 2,207
 2,182
 2,170
 2,162
 2,158
 2,157
 2,156
 2,156
 8
 166
2012    2,183
 2,181
 2,181
 2,189
 2,183
 2,184
 2,186
 2,192
 20
 170
2013      1,854
 1,882
 1,890
 1,894
 1,918
 1,931
 1,938
 26
 122
2014        2,202
 2,203
 2,189
 2,142
 2,156
 2,143
 19
 132
2015          2,491
 2,546
 2,557
 2,540
 2,559
 30
 135
2016            2,436
 2,532
 2,541
 2,479
 78
 138
2017              3,031
 3,066
 2,998
 171
 142
2018                3,006
 3,033
 295
 148
2019                  2,953
 725
 116
Total                  $24,271
    





Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$1,360 $1,835 $1,972 $2,052 $2,105 $2,129 $2,139 $2,146 $2,148 $2,149 
20121,177 1,806 1,957 2,063 2,117 2,149 2,164 2,163 2,165 
20131,043 1,504 1,688 1,787 1,843 1,885 1,895 1,917 
20141,310 1,765 1,926 2,035 2,080 2,106 2,116 
20151,499 2,084 2,271 2,392 2,478 2,508 
20161,453 2,052 2,211 2,314 2,370 
20171,698 2,520 2,668 2,799 
20181,926 2,549 2,706 
20191,668 2,437 
20201,334 
Total$22,501 

F-53F-51


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



North America Personal P&C Insurance — Short-tail (continued)
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $1,151
 $1,521
 $1,668
 $1,727
 $1,770
 $1,791
 $1,803
 $1,809
 $1,810
 $1,812
2011   1,358
 1,833
 1,969
 2,049
 2,103
 2,126
 2,136
 2,143
 2,146
2012     1,175
 1,804
 1,955
 2,061
 2,115
 2,147
 2,161
 2,161
2013       1,040
 1,499
 1,682
 1,781
 1,837
 1,879
 1,890
2014         1,308
 1,762
 1,922
 2,031
 2,076
 2,103
2015           1,497
 2,081
 2,267
 2,388
 2,475
2016             1,451
 2,049
 2,208
 2,311
2017               1,696
 2,517
 2,664
2018                 1,924
 2,545
2019                   1,666
Total                   $21,773


Net Liabilities for Loss and Allocated Loss Adjustment Expenses
  
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $27
All Accident years $2,525


North America Personal P&C Insurance — Short-tail (continued)
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$24
Accident years 2011 - 2020 from tables above3,001
All Accident years$3,025
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $(1)
All Accident years $(86)
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$(1)
Accident years 2011 - 2020 from tables above85
All Accident years$84
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage57 %24 %%%%%%%%%


Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage59% 23% 7% 4% 3% 1% 1% % % %

Overseas General Insurance — Casualty — Long-tail
This product line is comprised of D&O liability, E&O liability, financial institutions (including crime/fidelity coverages), and non-U.S. general liability as well as aviation and political risk. Exposures are located around the world, including Europe, Latin America, and Asia. Approximately 45 percent of Chubb Overseas General business is generated by European accounts, exclusive of Lloyd's market. There is some U.S. exposure in Casualty from multinational accounts and in financial lines for Lloyd's market. The financial lines coverages are typically written on a claims-made form, while general liability coverages are typically on an occurrence basis and comprised of a mix of primary and excess businesses.

Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31 2020
(in millions of U.S. dollars)UnauditedNet IBNR Reserves
Reported Claims (in thousands)
Accident Year2011201220132014201520162017201820192020
2011$1,255 $1,262 $1,254 $1,244 $1,158 $1,090 $1,079 $1,027 $1,023 $1,025 $31 37 
20121,290 1,261 1,326 1,346 1,343 1,337 1,315 1,304 1,272 87 38 
20131,281 1,279 1,276 1,322 1,276 1,242 1,182 1,148 86 39 
20141,279 1,352 1,362 1,378 1,293 1,206 1,165 151 39 
20151,196 1,296 1,328 1,351 1,326 1,265 199 41 
20161,232 1,337 1,407 1,437 1,425 341 43 
20171,227 1,332 1,381 1,433 384 43 
20181,330 1,383 1,447 671 43 
20191,409 1,480 809 40 
20201,810 1,493 28 
Total$13,470 

F-54F-52


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Overseas General Insurance — Casualty — Long-tail (continued)

    
Net Incurred Loss and Allocated Loss Adjustment Expenses    
 Years Ended December 31  As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$1,183
 $1,263
 $1,308
 $1,379
 $1,316
 $1,265
 $1,141
 $1,136
 $1,142
 $1,149
 $68
 37
2011  1,211
 1,218
 1,210
 1,200
 1,117
 1,054
 1,042
 991
 988
 35
 37
2012    1,246
 1,217
 1,279
 1,297
 1,294
 1,285
 1,265
 1,255
 137
 38
2013      1,237
 1,233
 1,229
 1,272
 1,226
 1,193
 1,136
 139
 38
2014        1,238
 1,308
 1,317
 1,333
 1,249
 1,167
 208
 39
2015          1,164
 1,259
 1,288
 1,311
 1,286
 287
 41
2016            1,191
 1,291
 1,357
 1,385
 428
 42
2017              1,185
 1,286
 1,335
 495
 41
2018                1,283
 1,333
 789
 40
2019                  1,346
 1,011
 32
Total                  $12,380
    
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $102
 $265
 $462
 $605
 $712
 $801
 $850
 $903
 $946
 $983
2011   87
 240
 384
 513
 612
 691
 764
 815
 848
2012     74
 245
 428
 577
 689
 826
 897
 939
2013       85
 261
 414
 558
 699
 798
 865
2014         111
 287
 461
 591
 704
 786
2015           86
 281
 484
 661
 780
2016             123
 316
 520
 667
2017               96
 314
 520
2018                 109
 325
2019                   122
Total                   $6,835
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $432
All Accident years $5,977

Overseas General Insurance — Casualty — Long-tail (continued)
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$86 $243 $393 $528 $631 $713 $789 $842 $876 $901 
201275 252 441 597 713 857 929 973 1,040 
201385 267 428 579 725 829 899 952 
2014111 293 473 608 725 811 876 
201586 287 497 679 802 884 
2016127 324 534 687 815 
201798 323 535 702 
2018112 334 503 
2019126 341 
2020110 
Total$7,124 
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $(18)
All Accident years $(61)
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$486
Accident years 2011 - 2020 from tables above6,346
All Accident years$6,832
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$(59)
Accident years 2011 - 2020 from tables above9
All Accident years$(50)
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage%15 %15 %12 %10 %%%%%%


Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage8% 15% 15% 12% 10% 9% 6% 4% 4% 3%



F-55


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Overseas General Insurance — Non-Casualty — Short-tail
This product line is comprised of commercial fire, marine (predominantly cargo), surety, personal automobile (in Latin America, Asia Pacific and Japan), personal cell phones, personal residential (including high net worth), energy and construction. In general, these lines have relatively stable payment and reporting patterns although they are impacted by natural catastrophes mainly in the 2010, 2011, 2017, and 2018 accident years. Latin America and Europe each make up about 30 percent of the Chubb Overseas General non-casualty book.

Net Incurred Loss and Allocated Loss Adjustment Expenses    
 Years Ended December 31  As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$1,647
 $1,669
 $1,643
 $1,632
 $1,626
 $1,612
 $1,599
 $1,582
 $1,584
 $1,582
 $6
 518
2011  1,871
 1,956
 1,900
 1,861
 1,843
 1,832
 1,824
 1,814
 1,810
 3
 544
2012    1,696
 1,686
 1,646
 1,591
 1,585
 1,577
 1,561
 1,556
 14
 556
2013      1,778
 1,770
 1,703
 1,656
 1,651
 1,621
 1,609
 27
 574
2014        1,852
 1,920
 1,862
 1,851
 1,814
 1,804
 15
 549
2015          1,952
 2,075
 2,051
 2,017
 1,999
 38
 571
2016            2,050
 2,052
 2,040
 2,018
 17
 567
2017              2,198
 2,238
 2,220
 46
 577
2018                2,153
 2,244
 124
 622
2019                  2,181
 376
 608
Total                  $19,023
    
F-53
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $671
 $1,226
 $1,424
 $1,486
 $1,524
 $1,537
 $1,544
 $1,545
 $1,550
 $1,562
2011   758
 1,460
 1,660
 1,716
 1,746
 1,761
 1,769
 1,773
 1,773
2012     681
 1,226
 1,412
 1,470
 1,493
 1,502
 1,515
 1,517
2013       698
 1,273
 1,466
 1,497
 1,534
 1,553
 1,562
2014         758
 1,423
 1,632
 1,696
 1,727
 1,741
2015           852
 1,546
 1,778
 1,858
 1,881
2016             1,015
 1,670
 1,865
 1,938
2017               1,046
 1,830
 2,005
2018                 994
 1,726
2019                   1,038
Total                   $16,743





F-56


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Overseas General Insurance — Non-Casualty — Short-tail (continued)
Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31 2020
(in millions of U.S. dollars)UnauditedNet IBNR Reserves
Reported Claims (in thousands)
Accident Year2011201220132014201520162017201820192020
2011$1,908 $1,995 $1,938 $1,898 $1,879 $1,867 $1,859 $1,849 $1,844 $1,843 $6 543 
20121,712 1,702 1,661 1,605 1,599 1,590 1,575 1,570 1,562 13 555 
20131,787 1,780 1,714 1,665 1,660 1,633 1,620 1,610 19 573 
20141,863 1,932 1,875 1,864 1,828 1,817 1,810 7 548 
20151,963 2,083 2,062 2,030 2,011 2,003 24 571 
20162,070 2,071 2,058 2,036 2,040 22 581 
20172,222 2,264 2,245 2,225 18 589 
20182,186 2,276 2,237 48 624 
20192,208 2,228 94 640 
20202,571 804 518 
Total$20,129 
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$765 $1,486 $1,694 $1,750 $1,780 $1,795 $1,804 $1,808 $1,807 $1,806 
2012679 1,237 1,425 1,485 1,508 1,518 1,530 1,532 1,532 
2013696 1,284 1,480 1,512 1,549 1,567 1,575 1,578 
2014758 1,438 1,651 1,715 1,746 1,759 1,774 
2015857 1,560 1,793 1,875 1,897 1,927 
20161,013 1,679 1,881 1,954 1,981 
20171,051 1,848 2,029 2,106 
20181,006 1,753 1,962 
20191,050 1,747 
20201,085 
Total$17,498 
Overseas General Insurance — Non-Casualty — Short-tail (continued)  
Net Liabilities for Loss and Allocated Loss Adjustment Expenses


(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $97
All Accident years $2,377
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$94
Accident years 2011 - 2020 from tables above2,631
All Accident years$2,725
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$(8)
Accident years 2011 - 2020 from tables above(69)
All Accident years$(77)
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage45 %35 %11 %%%%%%%%


Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $1
All Accident years $1


F-54

Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage45% 35% 11% 3% 2% 1% 1% % % 1%


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Global Reinsurance
Chubb analyzes its Global Reinsurance business on a treaty year basis rather than on an accident year basis. Treaty year data was converted to an accident year basis for the purposes of this disclosure. Mix shifts are an important consideration in these product line groupings. As proportional business and excess of loss business have different earning and loss reporting and payment patterns, this change in mix will affect the cash flow patterns across the accident years. In addition, the shift from excess to proportional business over time will make the cash flow patterns of older and more recent years difficult to compare. In general, the proportional business will pay out more quickly than the excess of loss business, as such, using older years development patterns may overstate the ultimate loss estimates in more recent years.

Global Reinsurance — Casualty — Long-tail
This product line includes proportional and excess coverages in general, automobile liability, professional liability, medical malpractice and workers' compensation, and aviation, with exposures located around the world. In general, reinsurance exhibits less stable development patterns than primary business. In particular, general casualty reinsurance and excess coverages are long-tailed and can be very volatile.

Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31
2020
(in millions of U.S. dollars)UnauditedNet
IBNR
Reserves
Accident Year2011201220132014201520162017201820192020
2011$408 $415 $430 $433 $428 $418 $415 $409 $402 $389 $15 
2012387 384 392 395 379 373 372 374 379 11 
2013321 327 330 331 332 324 317 311 13 
2014334 335 340 343 345 348 331 16 
2015285 290 300 301 309 306 22 
2016224 228 236 236 245 27 
2017215 217 221 218 28 
2018246 249 256 48 
2019239 248 90 
2020247 153 
Total$2,930 

Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$70 $146 $195 $236 $267 $292 $312 $325 $332 $338 
201278 168 223 262 293 309 324 336 342 
201365 143 186 222 242 260 269 272 
201492 185 218 249 265 277 287 
201590 159 192 217 233 250 
201658 113 143 159 175 
201747 100 122 140 
201842 96 126 
201940 90 
202041 
Total$2,061 

Net Incurred Loss and Allocated Loss Adjustment Expenses    
 Years Ended December 31  As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$399
 $419
 $430
 $441
 $430
 $424
 $414
 $400
 $387
 $373
 $23
 0.802
2011  407
 414
 428
 432
 427
 417
 413
 407
 401
 27
 0.659
2012    385
 382
 390
 393
 378
 371
 370
 372
 10
 0.457
2013      320
 326
 328
 329
 330
 323
 316
 20
 0.341
2014        332
 333
 338
 341
 343
 346
 39
 0.382
2015          284
 288
 299
 300
 308
 33
 0.298
2016            222
 226
 234
 233
 30
 0.341
2017              213
 214
 219
 45
 0.529
2018                244
 246
 65
 0.589
2019                  238
 130
 0.219
Total                  $3,052
    
F-55


F-57


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Global Reinsurance — Casualty — Long-tail (continued)

Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses
  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $56
 $125
 $179
 $220
 $249
 $274
 $291
 $306
 $315
 $320
2011   70
 146
 195
 236
 267
 291
 311
 324
 331
2012     77
 167
 221
 260
 292
 307
 322
 334
2013       65
 143
 186
 222
 241
 259
 268
2014         91
 184
 217
 248
 264
 276
2015           90
 159
 191
 217
 232
2016             57
 113
 142
 159
2017               46
 100
 122
2018                 41
 96
2019                   40
Total                   $2,178
Net Liabilities for Loss and Allocated Loss Adjustment Expenses


(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $303
All Accident years $1,177


Global Reinsurance — Casualty — Long-tail (continued)
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$331
Accident years 2011 - 2020 from tables above869
All Accident years$1,200
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $(50)
All Accident years $(58)
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$(10)
Accident years 2011 - 2020 from tables above(12)
All Accident years$(22)
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage21 %23 %12 %10 %%%%%%%


Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage21% 23% 12% 10% 7% 5% 4% 4% 2% 2%



Global Reinsurance — Non-Casualty — Short-tail
This product line includes property, property catastrophe, marine, credit/surety, A&H and energy. This product line is impacted by natural catastrophes, particularly in the 2011, 2017 and 2018 accident years. Of the non-catastrophe book, the mixture of business varies by year with approximately 7377 percent of loss on proportional treaties in treaty year 20102011 and after. This percentage has increased over time with the proportion being approximately 5859 percent for treaty years 20102011 to 2012 growing to an average of 8082 percent for treaty years 2013 to 2019,2020, with the remainder being written on an excess of loss basis.

Global Reinsurance — Non-Casualty — Short-tail (continued)

Net Incurred Loss and Allocated Loss Adjustment Expenses
Years Ended December 31As of December 31
2020
(in millions of U.S. dollars)UnauditedNet
IBNR
Reserves
Accident Year2011201220132014201520162017201820192020
2011$277 $279 $276 $266 $267 $268 $267 $268 $267 $269 $1 
2012233 211 202 192 191 188 186 186 184 1 
2013162 160 148 143 144 141 141 140 0 
2014167 182 183 186 184 183 182 3 
2015147 155 162 162 155 161 4 
2016184 189 192 194 190 5 
2017397 424 454 451 10 
2018288 300 303 (8)
2019143 141 29 
2020212 110 
Total$2,233 

F-58F-56


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Global Reinsurance — Non-Casualty — Short-tail (continued)
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses

Years Ended December 31
(in millions of U.S. dollars)Unaudited
Accident Year2011201220132014201520162017201820192020
2011$87 $179 $210 $236 $254 $259 $262 $263 $264 $265 
201245 130 157 167 173 178 180 181 180 
201346 103 121 131 134 137 137 139 
201466 131 154 165 171 173 175 
201556 104 133 143 147 153 
201657 133 161 172 178 
2017191 322 402 415 
201894 258 277 
201935 86 
202063 
Total$1,931 
Net Liabilities for Loss and Allocated Loss Adjustment Expenses
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$10
Accident years 2011 - 2020 from tables above302
All Accident years$312
Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars)December 31, 2020
Accident years prior to 2011$0
Accident years 2011 - 2020 from tables above(2)
All Accident years$(2)
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2020 (Unaudited)
Age in Years10 
Percentage33 %38 %14 %%%%%%%%
Global Reinsurance — Non-Casualty — Short-tail (continued)

    
Net Incurred Loss and Allocated Loss Adjustment Expenses

      
  Years Ended December 31  As of December 31 2019 
(in millions of U.S. dollars)Unaudited    Net IBNR Reserves
 
Reported Claims (in thousands)

Accident Year2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
 
2010$194
 $228
 $218
 $212
 $216
 $218
 $218
 $219
 $218
 $217
 $
 0.102
2011  269
 270
 268
 258
 258
 260
 259
 259
 259
 1
 0.132
2012    230
 210
 200
 191
 189
 187
 184
 184
 1
 0.113
2013      161
 159
 147
 142
 143
 140
 140
 
 0.121
2014        164
 180
 180
 183
 181
 180
 3
 0.101
2015          146
 154
 161
 161
 153
 3
 0.115
2016            180
 186
 188
 190
 12
 0.182
2017              396
 423
 453
 10
 0.309
2018                285
 297
 (6) 0.212
2019                  141
 73
 0.032
Total                  $2,214
    
Net Cumulative Paid Loss and Allocated Loss Adjustment Expenses



  Years Ended December 31 
(in millions of U.S. dollars)Unaudited   
Accident Year 2010
 2011
 2012
 2013
 2014
 2015
 2016
 2017
 2018
 2019
2010 $55
 $156
 $182
 $193
 $199
 $209
 $207
 $210
 $210
 $214
2011   85
 174
 204
 228
 246
 251
 253
 254
 256
2012     45
 130
 156
 166
 172
 177
 179
 180
2013       46
 102
 120
 129
 132
 135
 135
2014         65
 129
 152
 163
 169
 171
2015           56
 103
 132
 142
 146
2016             56
 131
 158
 169
2017               191
 322
 402
2018                 94
 257
2019                   35
Total                   $1,965
Net Liabilities for Loss and Allocated Loss Adjustment Expenses

(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $6
All Accident years $255

Supplementary Information: (Favorable)/ Adverse Prior Period Development
(in millions of U.S. dollars) December 31, 2019
Accident years prior to 2010 $(4)
All Accident years $30

F-
57
Supplementary Information: Average Annual Percentage Payout of Net Incurred Claims by Age, as of December 31, 2019 (Unaudited)
Age in Years1
 2
 3
 4
 5
 6
 7
 8
 9
 10
Percentage33% 36% 15% 6% 3% 2% 1% 1% % %



F-59


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Prior Period Development — Supplementary Information

The following table presents a reconciliation of the loss development triangles above to prior period development:
Components of PPD
Year Ended December 31, 2020 (in millions of U.S. dollars)
(favorable)/unfavorable
2011 - 2019 accident years (implied PPD per loss triangles)Accident years prior to 2011
Other (1)
PPD on loss reservesRIPs, Expense adjustments, and earned premiumsTotal
North America Commercial P&C Insurance
Long-tail$(354)$(247)$(102)$(703)$31 $(672)
Short-tail(37)2 5 (30)0 (30)
(391)(245)(97)(2)(733)31 (3)(702)
North America Personal P&C Insurance (Short-tail)85 (1)(3)81 (18)63 
Overseas General Insurance
Long-tail9 (59)1 (49)0 (49)
Short-tail(69)(8)(24)(101)0 (101)
(60)(67)(23)(4)(150)0 (150)
Global Reinsurance
Long-tail(12)(10)(1)(23)(2)(25)
Short-tail(2)0 (1)(3)(1)(4)
(14)(10)(2)(26)(3)(29)
Subtotal$(380)$(323)$(125)$(828)$10 $(818)
North America Agricultural Insurance (Short-tail)$(19)$9 $(10)
Corporate (Long-tail)433 0 433 
Consolidated PPD$(414)$19 $(395)
 Components of PPD 
Year Ended December 31, 2019 (in millions of U.S. dollars)
(favorable)/unfavorable
2010 - 2018 accident years (implied PPD per loss triangles)
 Accident years prior to 2010
 
Other (1)

 PPD on loss reserves
 RIPs, Expense adjustments, and earned premiums
 Total
North America Commercial P&C Insurance      

   

Long-tail$(460) $(137) $(110) $(707) $39
 $(668)
Short-tail38
 (6) (8) 24
 (5) 19
 (422) (143) (118)
(2) 
(683) 34
 (649)
North America Personal P&C Insurance (Short-tail)(85) (1) (5) (91) (4) (95)
Overseas General Insurance      

   

Long-tail(43) (18) (7) (68) 
 (68)
Short-tail
 1
 (26) (25) 1
 (24)
 (43) (17) (33)
(3) 
(93) 1
 (92)
Global Reinsurance      

   

Long-tail(8) (50) (1) (59) 
 (59)
Short-tail34
 (4) 1
 31
 (1) 30
 26
 (54) 
 (28) (1) (29)
Subtotal$(524) $(215) $(156) $(895) $30
 $(865)
North America Agricultural Insurance (Short-tail)      $(103) $23
 $(80)
Corporate (Long-tail)      153
 
 153
Consolidated PPD

 

 

 $(845) $53
 $(792)
(1) (1)        Other includes the impact of foreign exchange.
Other includes the impact of foreign exchange.
(2)
Includes favorable development of $82 million related to our Alternative Risk Solutions business (U.S. and Bermuda) and an adjustment to exclude $22 million in unfavorable development in the workers' compensation line, associated with an increase in exposure for which additional premiums were collected; the remaining difference relates to a number of other items, none of which are individually material.
(3)
Includes favorable development of $37 million related to International A&H business; the remaining difference relates to a number of other items, none of which are individually material.

(2)     Includes favorable development of $80 million related to our Alternative Risk Solutions business (U.S. and Bermuda) and an adjustment to exclude $15 million in unfavorable development in the workers' compensation line, associated with an increase in exposure for which additional premiums were collected; the remaining difference relates to a number of other items, none of which are individually material.
(3)     Includes premium returns associated with our Alternative Risk Solutions business, which is excluded from the triangles.
(4)     Includes favorable development of $22 million related to International A&H business; the remaining difference relates to a number of other items, none of which are individually material.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Prior Period Development
Prior period development (PPD) arises from changes to loss estimates recognized in the current year that relate to loss events that occurred in previous calendar years and excludes the effect of losses from the development of earned premium from previous accident years. Long-tail lines include lines such as workers' compensation, general liability, and professional liability; while short-tail lines include lines such as most property lines, energy, personal accident, and agriculture. The following table summarizes (favorable) and adverse priorPPD by segment:
Years Ended December 31
(in millions of U.S. dollars, except for percentages)
Long-tailShort-tailTotal
% of beginning net unpaid reserves (1)
2020
North America Commercial P&C Insurance$(672)$(30)$(702)1.4 %
North America Personal P&C Insurance0 63 63 0.1 %
North America Agricultural Insurance0 (10)(10)0 %
Overseas General Insurance(49)(101)(150)0.3 %
Global Reinsurance(25)(4)(29)0.1 %
Corporate433 0 433 0.9 %
Total$(313)$(82)$(395)0.8 %
2019
North America Commercial P&C Insurance$(668)$19 $(649)1.3 %
North America Personal P&C Insurance(95)(95)0.2 %
North America Agricultural Insurance(80)(80)0.2 %
Overseas General Insurance(68)(24)(92)0.2 %
Global Reinsurance(59)30 (29)0.1 %
Corporate153 153 0.3 %
Total$(642)$(150)$(792)1.6 %
2018
North America Commercial P&C Insurance$(395)$(215)$(610)1.2 %
North America Personal P&C Insurance41 41 0.1 %
North America Agricultural Insurance(110)(110)0.2 %
Overseas General Insurance(67)(145)(212)0.4 %
Global Reinsurance(69)19 (50)0.1 %
Corporate45 45 0.1 %
Total$(486)$(410)$(896)1.8 %
(1)     Calculated based on the beginning of period development (PPD) by segment:consolidated net unpaid losses and loss expenses.
Years Ended December 31
(in millions of U.S. dollars, except for percentages)
Long-tail    
 Short-tail    
 Total
 
% of beginning net unpaid reserves (1)

2019       
North America Commercial P&C Insurance$(668) $19
 $(649) 1.3%
North America Personal P&C Insurance
 (95) (95) 0.2%
North America Agricultural Insurance
 (80) (80) 0.2%
Overseas General Insurance(68) (24) (92) 0.2%
Global Reinsurance(59) 30
 (29) 0.1%
Corporate153
 
 153
 0.3%
Total$(642) $(150) $(792) 1.6%
2018       
North America Commercial P&C Insurance$(395) $(215) $(610) 1.2%
North America Personal P&C Insurance
 41
 41
 0.1%
North America Agricultural Insurance
 (110) (110) 0.2%
Overseas General Insurance(67) (145) (212) 0.4%
Global Reinsurance(69) 19
 (50) 0.1%
Corporate45
 
 45
 0.1%
Total$(486) $(410) $(896) 1.8%
2017       
North America Commercial P&C Insurance$(562) $(184) $(746) 1.6%
North America Personal P&C Insurance
 69
 69
 0.1%
North America Agricultural Insurance
 (119) (119) 0.2%
Overseas General Insurance(71) (181) (252) 0.5%
Global Reinsurance(68) 9
 (59) 0.1%
Corporate278
 
 278
 0.6%
Total$(423) $(406) $(829) 1.7%
(1)
Calculated based on the beginning of period consolidated net unpaid losses and loss expenses.
Significant prior period movements by segment, principally driven by reserve reviews completed during each respective period, are discussed in more detail below. The remaining net development for long-tail lines and short-tail business for each segment and Corporate comprises numerous favorable and adverse movements across a number of lines and accident years, none of which is significant individually or in the aggregate.

North America Commercial P&C Insurance
2020
North America Commercial P&C Insurance experienced net favorable PPD of $702 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:
2019Net favorable development of $672 million in long-tail business, primarily from:

Net favorable development of $363 million in workers’ compensation lines. The majority of the favorable development related to accident years 2016 and prior, driven by lower than expected loss emergence and related updates to loss development factors. In addition, we experienced favorable development of $62 million related to our annual assessment of multi-claimant events, including industrial accidents, in the 2019 accident year. Consistent with prior

F-59


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

years, we reviewed these potential exposures after the close of the accident year to allow for late reporting or identification of significant losses. This favorable development in accident year 2019 was partially offset by some higher than expected activity from other claims;

Net favorable development of $231 million in management liability portfolios, favorably impacting accident years 2015 and prior where paid and reported loss activity was lower than expected, partially offset by adverse development in the 2016 through 2019 accident years, mainly due to higher than expected claim severity in our Directors and Officers (D&O) portfolios;

Net favorable development of $83 million in commercial excess and umbrella portfolios, mainly in accident years 2014 and prior, driven by lower paid and reported loss activity relative to prior expectations as well as an increase in weighting towards experience-based methods, partially offset by adverse development in more recent accident years, due to higher than expected loss activity;

Net favorable development of $67 million in professional liability (errors & omissions and cyber risk), driven by accident years 2016 and prior, which experienced lower than expected loss emergence;

Net favorable development of $43 million in voluntary environmental lines, in accident years 2016 and prior, due to lower than expected loss emergence and a related update to loss development factors;

Net favorable development of $41 million on large multi-line prospective deals in the 2016 and prior accident years, due to lower than expected reported loss activity. These structured deals typically cover large clients for multiple product lines and with varying loss limitations; this development is net of premium returns of $26 million tied to the loss performance of the particular deals;

Net favorable development of $40 million in foreign casualty businesses, mainly in accident year 2016, due to lower than expected reported loss activity, partially offset by adverse development on a large loss in accident year 2017;

Net adverse development of $48 million in general liability coverages, driven by higher than expected reported loss activity in accident years 2017 through 2019, partially offset by favorable development in older accident years;

Net adverse development of $64 million in medical liability businesses, mainly impacting accident years 2016 through 2019, primarily due to higher than expected reported loss emergence and associated changes to loss development factors and loss expectations; and

Net adverse development of $77 million in commercial automobile liability, mainly in high deductible and excess portfolios, driven by adverse paid and reported loss emergence and related updates to loss development factors, mainly in accident years 2015 through 2019.

Net favorable development of $30 million in short-tail business primarily from:

Net favorable development of $37 million, in accident & health, mainly in accident years 2018 and 2019, driven by lower than expected paid loss emergence;

Net favorable development of $31 million in surety businesses, driven by accident year 2018, where loss emergence was lower than expected; and

Net adverse development of $21 million in our marine portfolios, mainly impacting the 2019 accident year, driven by higher than expected non-catastrophe loss development.

2019
North America Commercial P&C Insurance experienced net favorable PPD of $649 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:
Net favorable development of $668 million in long-tail business, primarily from:

Net favorable development of $303 million in workers’ compensation lines. This included favorable development of $61 million related to our annual assessment of multi-claimant events including industrial accidents, in the 2018 accident year. Consistent with prior years, we reviewed these potential exposures after the close of the accident year to allow for late reporting or identification of significant losses. This development in accident year 2018 was partially$668 million in long-tail business, primarily from:

Net favorable development of $303 million in workers’ compensation lines. This included favorable development of $61 million related to our annual assessment of multi-claimant events including industrial accidents, in the 2018 accident year. Consistent with prior years, we reviewed these potential exposures after the close of the accident year to allow for late reporting or identification of significant losses. This development in accident year 2018 was partially offset by some higher than expected activity from other claims and from involuntary pools. The remaining overall


F-61F-60


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



offset by some higher than expected activity from other claims and from involuntary pools. The remaining overall favorable development was mainly in accident years 2015 and prior, generally driven by lower than expected loss experience and related updates to loss development factors;

Net favorable development of $217 million in management liability portfolios, favorably impacting accident years 2015 and prior where paid and reported loss activity was lower than expected, partially offset by adverse development in the 2016 through 2018 accident years, mostly as a result of higher severity claim costs compared to prior expectations in certain lines or coverages, particularly in our Directors and Officers (D&O) portfolios;
Net favorable development of $217 million in management liability portfolios, favorably impacting accident years 2015 and prior where paid and reported loss activity was lower than expected, partially offset by adverse development in the 2016 through 2018 accident years, mostly as a result of higher severity claim costs compared to prior expectations in certain lines or coverages, particularly in our Directors and Officers (D&O) portfolios;

Net favorable development of $60 million in professional liability (errors & omissions and cyber), mainly in the 2015 and prior accident years where case activity was less than expected, partially offset by adverse development in the 2016 accident year, which was driven by several large adverse claim developments;
Net favorable development of $60 million in professional liability (errors & omissions and cyber), mainly in the 2015 and prior accident years where case activity was less than expected, partially offset by adverse development in the 2016 accident year, which was driven by several large adverse claim developments;

Net favorable development of $41 million in commercial excess and umbrella portfolios, mainly in accident years 2013 and prior, driven by lower paid and reported loss activity relative to prior expectations as well as an increase in weighting towards experience-based methods, partly offset by modestly adverse development in more recent accident years, mainly in 2017 and 2018, due to higher than expected large loss activity;
Net favorable development of $41 million in commercial excess and umbrella portfolios, mainly in accident years 2013 and prior driven by lower paid and reported loss activity relative to prior expectations as well as an increase in weighting towards experience-based methods, partly offset by modestly adverse development in more recent accident years, mainly in 2017 and 2018, due to higher than expected large loss activity;

Net favorable development of $39 million in foreign casualty business, impacting accident years 2015 and prior, driven by reported loss activity that was generally lower than expected;
Net favorable development of $39 million in foreign casualty business, impacting accident years 2015 and prior, driven by reported loss activity that was generally lower than expected;

Net favorable development of $36 million on large multi-line prospective deals in the 2015 and prior accident years, due to lower than expected reported loss activity. These structured deals typically cover large clients for multiple product lines and with varying loss limitations; this development is net of premium returns of $34 million tied to the loss performance of the particular deals;
Net favorable development of $36 million on large multi-line prospective deals in the 2015 and prior accident years, due to lower than expected reported loss activity. These structured deals typically cover large clients for multiple product lines and with varying loss limitations; this development is net of premium returns of $34 million tied to the loss performance of the particular deals;

Net favorable development of $24 million in medical and life sciences businesses, mainly impacting accident years 2015 and prior, primarily due to favorable reported experience and an increase in weighting towards experience-based methods;
Net favorable development of $24 million in medical and life sciences businesses, mainly impacting accident years 2015 and prior, primarily due to favorable reported experience and an increase in weighting towards experience-based methods;

Favorable development of $23 million in political risk and trade credit portfolios, mainly impacting the 2015 accident year, primarily due to favorable reported experience and an increase in weighting towards experience-based methods;
Favorable development of $23 million in political risk and trade credit portfolios, mainly impacting the 2015 accident year, primarily due to favorable reported experience and an increase in weighting towards experience-based methods;

Net adverse development of $26 million mainly in products and general liability portfolios, including adverse movements within construction, partly offset by commercial-multi peril (CMP) liability, with older accident years generally experiencing favorable run-off, while more recent accident years developing adversely; and
Net adverse development of $26 million mainly in products and general liability portfolios, including adverse movements within construction, partly offset by commercial-multi peril (CMP) liability, with older accident years generally experiencing favorable run-off, while more recent accident years developing adversely; and

Net adverse development of $38 million in automobile liability, driven by adverse paid and reported loss experience mainly in accident years 2014 through 2018.
Net adverse development of $38 million in automobile liability, driven by adverse paid and reported loss experience mainly in accident years 2014 through 2018.

Net adverse development of $19 million in short-tail business, primarily from:
Net adverse development of $19 million in short-tail business, primarily from:

Net adverse development, excluding catastrophes, of $108 million in property and marine portfolios with adverse development of $152 million across our retail, wholesale, and program distribution channels in accident year 2018, primarily due to a higher than expected severity of non-catastrophe claims, partly offset by favorable development of $44 million in 2017 and prior accident years on non-catastrophe claims;
Net adverse development, excluding catastrophes, of $108 million in property and marine portfolios with adverse development of $152 million across our retail, wholesale, and program distribution channels in accident year 2018, primarily due to a higher than expected severity of non-catastrophe claims, partly offset by favorable development of $44 million in 2017 and prior accident years on non-catastrophe claims;

Net favorable catastrophe development in property and marine portfolios of $36 million. There was $41 million of favorable development on the 2017 and 2018 natural catastrophes, mostly in 2017, partly offset by some adverse development on older catastrophe events; and
Net favorable catastrophe development in property and marine portfolios of $36 million. There was $41 million of favorable development on the 2017 and 2018 natural catastrophes, mostly in 2017, partly offset by some adverse development on older catastrophe events; and

Favorable development of $49 million in surety businesses, mainly in accident year 2017, driven by lower than expected reported loss activity.
Favorable development of $49 million in surety businesses, mainly in accident year 2017, driven by lower than expected reported loss activity.

2018
North America Commercial P&C Insurance experienced net favorable PPD of $610 million, representing 1.2 percent of the beginning consolidated net unpaid losses and loss expense reserves.

F-62F-61


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



North America Personal P&C Insurance
20182020
North America CommercialPersonal P&C Insurance experiencedincurred net favorableadverse PPD of $610$63 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:
Net favorable development of
$395 million in long-tail business, primarily from:

Net favorable development of $199 million in our management liability portfolios, favorably impacting accident years 2013 and prior where paid and reported loss activity was lower than expected, partially offset by adverse development in the 2014 through 2017 accident years, mostly as a result of higher severity claim costs compared to prior expectations in certain lines or coverages, particularly in our Directors and Officers (D&O) portfolio;

Net favorable development of $194 million in workers’ compensation lines with favorable development of $56 million in the 2017 accident year mainly related to our annual assessment of multi-claimant events including industrial accidents. Consistent with prior years, we reviewed these potential exposures after the close of the accident year to allow for late reporting or identification of significant losses. The net remaining favorable development of $138 million was principally due to lower than expected loss experience, mainly impacting accident years 2014 and prior;

Net favorable development of $100 million in our commercial excess and umbrella portfolios, primarily in accident years 2012 and prior. This was driven by lower than expected reported loss activity, and an increase in weighting towards experience-based methods, partly offset by higher than expected claim activity in the 2014, 2015 and 2017 accident years which led to reserve strengthening in those years;

Favorable development of $33 million in a runoff professional liability portfolio, impacting accident years 2002 and prior, owing mainly to the favorable disposition of a specific claim;

Net favorable development of $28 million in our foreign casualty lines, primarily impacting accident years 2014 and prior, driven by reported loss activity that was generally lower than expected;

Favorable development of $23 million in our political risk and trade credit portfolios, mainly impacting the 2014 accident year, primarily due to favorable reported experience and an increased in weighting towards experience-based methods;

Net adverse development of $91 million in our medical portfolios, mainly impacting accident years 2015, 2016 and 2017. The increase was driven by a combination of several large claims and generally higher than expected paid and reported case incurred activity; and

Net adverse development of $109 million, mainly in our automobile liability, commercial-multi peril (CMP) liability, products and general liability lines, driven by adverse paid and reported loss activity relative to prior expectations in accident years 2015 through 2017, partly offset by favorable emergence in older accident years.

Net favorable development of $215 million in short-tail business, primarily from:

Net favorable development of $155 million in our commercial property and marine businesses due to favorable claim development, including $129 million net favorable development on the 2017 natural catastrophes; and

Net favorable development of $60 million in other short-tail business, including $19 million in surety and also including several smaller net favorable movements from lower than expected case activity in other classes, such as accident and commercial automobile physical damage, none of which were significant individually or in the aggregate.

2017Net adverse development of $84 million in the homeowners product line, including valuables, mainly in accident years 2017 through 2019 due to higher than expected non-catastrophe loss emergence and adverse development arising from natural catastrophes in accident years 2017 and 2018; and
North America Commercial P&C Insurance experienced net
Net favorable PPDdevelopment of $746$22 million representing 1.6 percent ofin the beginning consolidated net unpaid losses and loss expense reserves.



F-63


North America Personal P&C Insurance
2019
North America Personal P&C Insurance incurred net favorable PPD of $95 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

Net favorable claim development of $132 million on the 2017 and 2018 natural catastrophes for all lines;

Net favorable development of $26 million in our personal excess lines primarily impacting the 2016 accident year, due to lower than expected loss emergence and an increase in weighting towards experience-based methods, partly offset by adverse emergence in accident year 2015;

Net favorable development of $16 million, which was the net result of several underlying favorable and adverse movements predominantly in the automobile and recreational marine lines; and

Net adverse development of $82 million in our homeowners lines, including valuables, arising from non-catastrophe loss emergence, mainly in the 2018 accident year.

2018Net favorable claim development of $132 million on the 2017 and 2018 natural catastrophes for all lines;

Net favorable development of $26 million in our personal excess lines primarily impacting the 2016 accident year, due to lower than expected loss emergence and an increase in weighting towards experience-based methods, partly offset by adverse emergence in accident year 2015; and

Net adverse development of $82 million in our homeowners lines, including valuables, arising from non-catastrophe loss emergence, mainly in the 2018 accident year.

2018
North America Personal P&C Insurance incurred net adverse PPD of $41 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

Net adverse development of $63 million in our homeowners and valuables lines, primarily impacting the 2017 accident year. Overall, non-catastrophe losses were $136 million higher than expected, partially offset by favorable claim development of $73 million on the 2017 natural catastrophes. The higher than expected non-catastrophe homeowners losses were primarily severity driven and included water-related claims, large fire losses, and non-catastrophe weather claims; and

Net favorable development of $24 million in our personal excess lines primarily impacting the 2015 accident year, due to lower than expected loss emergence and an increase in weighting towards experience-based methods.

2017
North America Personal P&C Insurance incurred net adverse PPD of $69 million, representing 0.1 percent of the beginning consolidated net unpaid losses and loss expense reserves.

North America Agricultural Insurance
North America Agricultural Insurance experienced net favorable PPD of $10 million, $80 million, and $110 million in 2020, 2019, and $119 million in 2019, 2018, and 2017, respectively. Actual claim development mainly relates to our Multiple Peril Crop Insurance business and was favorable due to better than expected crop yield results in certain states at the prior year-end period (i.e., 20192020 results based on crop yield results at year-end 2018)2019).

Overseas General Insurance
2020
Overseas General Insurance experienced net favorable PPD of $150 million which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:
2019
Net favorable development of $49 million in long-tail business, primarily from:

Net favorable development of $94 million in casualty lines, including favorable development of $143 million in accident years 2016 and prior, due to lower than expected loss emergence across primary and excess lines in Continental Europe, U.K., and Asia Pacific, partially offset by adverse development of $49 million in accident years 2017 through 2019, primarily due to adverse large loss experience in U.K. and Asia Pacific;

Net favorable development of $22 million in political risk, driven by lower than expected loss emergence in accident years 2018 and 2019; and

Net adverse development of $80 million in financial lines, with favorable development of $61 million in accident years 2015 and prior, primarily from favorable case-specific settlements within Continental Europe and Asia Pacific financial institutions, which was more than offset by adverse development of $141 million in accident years 2016 through 2019, primarily due to adverse large loss experience in D&O portfolios in the U.K. and Asia Pacific.

Net favorable development of $101 million in short-tail business, primarily from:

F-62


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries


Net favorable development of $69 million in marine, driven by favorable loss emergence and claim-specific loss settlements across all regions in accident years 2012 through 2019; and

Net favorable development of $21 million in A&H, driven by favorable development across Continental Europe, U.K. and Latin America primarily in accident years 2018 and 2019.

2019
Overseas General Insurance experienced net favorable PPD of $92 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

Net favorable development of $68 million in long-tail business, primarily from:

Net favorable development of $101 million in casualty lines, including favorable development of $123 million in accident years 2015 and prior, due to lower than expected loss emergence mainly across primary lines in Continental Europe, U.K., and Asia Pacific, partially offset by adverse development of $22 million in accident years 2016 through 2018, primarily due to adverse attritional and large loss experience in Continental Europe; and

Net adverse development of $52 million in financial lines, including adverse development of $127 million in accident years 2016 through 2018, primarily due to adverse large loss experience in D&O in the U.K. and Asia Pacific, offset by favorable development of $75 million in accident years 2015 and prior, due to lower than expected loss emergence across most regions in D&O and Professional Indemnity.



F-64


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)Net favorable development of $68 million in long-tail business, primarily from:
Chubb Limited
Net favorable development of $101 million in casualty lines, including favorable development of $123 million in accident years 2015 and Subsidiaries



Net favorable of $24 million in short-tail business, primarily from:

Net favorable development of $45 million in A&H, driven by favorable development across Continental Europe, Latin America and Asia Pacific primarily in accident years 2017 and 2018;

Net favorable development of $36 million in marine, driven by favorable loss emergence and claim-specific loss settlements across most regions and several accident years, including favorable liability emergence and litigation settlements in accident years 2016 and prior;

Net adverse development of $23 million in construction, driven by adverse large loss experience in accident year 2018 for U.K. and Asia Pacific;prior, due to lower than expected loss emergence mainly across primary lines in Continental Europe, U.K., and Asia Pacific, partially offset by adverse development of $22 million in accident years 2016 through 2018, primarily due to adverse attritional and large loss experience in Continental Europe; and

Net adverse development of $27 million in Surety, driven by adverse large loss experience across Continental Europe and Latin America in accident years 2017 and 2018.

2018
Net adverse development of $52 million in financial lines, including adverse development of $127 million in accident years 2016 through 2018, primarily due to adverse large loss experience in D&O in the U.K. and Asia Pacific, offset by favorable development of $75 million in accident years 2015 and prior, due to lower than expected loss emergence across most regions in D&O and Professional Indemnity.

Net favorable of $24 million in short-tail business, primarily from:

Net favorable development of $45 million in A&H, driven by favorable development across Continental Europe, Latin America and Asia Pacific primarily in accident years 2017 and 2018;

Net favorable development of $36 million in marine, driven by favorable loss emergence and claim-specific loss settlements across most regions and several accident years, including favorable liability emergence and litigation settlements in accident years 2016 and prior;

Net adverse development of $23 million in construction, driven by adverse large loss experience in accident year 2018 for U.K. and Asia Pacific; and

Net adverse development of $27 million in Surety, driven by adverse large loss experience across Continental Europe and Latin America in accident years 2017 and 2018.

2018
Overseas General Insurance experienced net favorable PPD of $212 million, representing 0.4 percent of the beginning consolidated net unpaid losses and loss expense reserves.

Global Reinsurance
2020
Global Reinsurance experienced net favorable PPD of $29 million, which was the net result of several underlying favorable and adverse movements, and was driven bynone of which is significant individually or in the following principal changes:

Net favorable development of $67 million in long-tail business, primarily from:

Net favorable development of $70 million in casualty lines, with net favorable development of $107 million in accident years 2014 and prior, resulting from lower than expected loss emergence across primary and excess lines, partially offset by adverse development of $38 million in accident years 2015 through 2017, primarily due to large loss experience in U.K. excess lines and wholesale business;

Favorable development of $32 million, primarily including $12 million in political risks, $10 million in aviation and $10 million in environmental; and

Net adverse development of $38 million in financial lines, with net favorable development of $93 million in accident years 2014 and prior, resulting from lower than expected loss emergence including favorable development due to specific large claim reductions in Asia financial institutions including wholesale bankers D&O and bankers professional indemnity, and adverse development of $131 million in accident years 2015 through 2017, primarily due to adverse large loss experience in specific D&O and financial institutions portfolios in Australia, Continental Europe and the U.K.

Net favorable development of $145 million in short-tail business, primarily from:

Net favorable development of $99 million in property and marine (excluding technical lines), primarily in accident years 2013 through 2016, driven mainly by favorable loss emergence across all regions, including favorable claim-specific loss settlements and salvage/subrogation recoveries;

Net favorable development of $33 million in A&H, primarily in accident years 2015 through 2017, driven by favorable development across Asia Pacific direct marketing and Continental Europe corporate lines.

aggregate.
2017
Overseas General Insurance experienced net favorable PPD of $252 million, representing 0.5 percent of the beginning consolidated net unpaid losses and loss expense reserves.









F-65


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Global Reinsurance
2019
Global Reinsurance experienced net favorable PPD of $29 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

Net favorable development of $59 million in long-tail business, primarily in our auto, casualty, professional liability, medical malpractice, and workers’ compensation lines primarily from treaty years 2013 and prior principally due to lower than expected loss emergence; and

Net adverse development of $30 million in short-tail business, which included $44 million of adverse development on 2017 and 2018 natural catastrophe events.

2018Net favorable development of $59 million in long-tail business, primarily in our auto, casualty, professional liability, medical malpractice, and workers’ compensation lines primarily from treaty years 2013 and prior principally due to lower than expected loss emergence; and

Net adverse development of $30 million in short-tail business, which included $44 million of adverse development on 2017 and 2018 natural catastrophe events.


F-63


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

2018
Global Reinsurance experienced net favorable PPD of $50 million, which was the net result of several underlying favorable and adverse movements, and was driven by the following principal changes:

Net favorable development of $69 million in long-tail business, primarily in our casualty, professional liability, medical malpractice, and workers' compensation lines primarily from treaty years 2013 and prior principally resulting from lower than expected loss emergence; and

Net adverse development of $19 million in short-tail business, which included $18 million of net adverse claim development on the 2017 natural catastrophes.

2017
Global Reinsurance experienced net favorable PPD of $59 million, representing 0.1 percent of the beginning consolidated net unpaid losses and loss expense reserves.

Corporate
2020
Corporate incurred adverse development of $433 million in long-tail lines, driven by the following principal changes:
2019
Adverse development of $254 million for U.S. child molestation claims, predominantly reviver statute-related;

Adverse development of $106 million associated with asbestos and environmental liabilities, generally attributable to certain case specific incurred activity and higher than expected indemnity, expenses and defense costs on a limited number of accounts;

Adverse development of $38 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred in 2020 and $27 million from an increase in the provision for uncollectible reinsurance.
2019
Corporate incurred adverse development of $153 million in long-tail lines, driven by the following principal changes:

Adverse development of $116 millionAdverse development of $116 million driven principally by adverse development in asbestos and environmental liabilities due to the emergence of a limited number of excess accounts and somewhat greater than expected defense and indemnity costs (generally impacting larger modeled accounts); and

Adverse development of $37 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred in 2019.

2018
Corporate incurred adverse development in asbestos and environmental liabilities due to the emergence of $45 million in long-tail lines, driven by the following principal changes:

Adverse development of $216 million in run-off liabilities, driven primarily by increased exposure on a limited number of direct asbestos claims and environmental sites, somewhat greater than expected defense cost spending and increases in reported claims and settlements with respect to molestation exposures;

Adverse development of $35 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred in 2018;a limited number of excess accounts and somewhat greater than expected defense and indemnity costs (generally impacting larger modeled accounts); and

Favorable development of $205 million as a result of the settlements of certain previously disputed reinsurance balances.

2017
Adverse development of $37 million on unallocated loss adjustment expenses due to run-off operating expenses paid and incurred in 2019.

2018
Corporate incurred adverse PPD of $278$45 million, representing 0.60.1 percent of the beginning consolidated net unpaid losses and loss expense reserves.



F-66


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Asbestos and environmental (A&E)
Chubb's exposure to A&E claims principally arises out of liabilities acquired when it purchased Westchester Specialty in 1998, CIGNA's P&C business in 1999, and Chubb Corp in 2016. The following table presents a roll-forward of consolidated A&E loss reserves including allocated loss expense reserves for A&E exposures, and the provisionvaluation allowance for uncollectible paid and unpaid reinsurance recoverables:
AsbestosEnvironmentalTotal
(in millions of U.S. dollars)GrossNetGrossNetGrossNet
Balance at December 31, 2017$1,621 $1,051 $607 $476 $2,228 $1,527 
Incurred activity136 75 101 (97)237 (22)(1)
Paid activity(265)(162)(83)104 (348)(58)
Balance at December 31, 20181,492 964 625 483 2,117 1,447 
Incurred activity129 70 46 28 175 98 (1)
Paid activity(162)(118)(142)(101)(304)(219)
Balance at December 31, 20191,459 916 529 410 1,988 1,326 
Incurred activity150 90 79 41 229 131 (1)
Paid activity(258)(133)(91)(72)(349)(205)
Balance at December 31, 2020$1,351 $873 $517 $379 $1,868 $1,252 
  Asbestos  Environmental  Total  
(in millions of U.S. dollars) Gross
 Net
 Gross

Net
 Gross
 Net
 
Balance at December 31, 2016 $1,726
 $1,119
 $577
 $490
 $2,303
 $1,609
 
Incurred activity 228
 104
 199
 113
 427
 217
(1) 
Paid activity (333) (172) (169) (127) (502) (299) 
Balance at December 31, 2017 1,621
 1,051
 607
 476
 2,228
 1,527
 
Incurred activity 136
 75
 101
 (97) 237
 (22)
(1) 
Paid activity (265) (162) (83) 104
 (348) (58) 
Balance at December 31, 2018 1,492
 964
 625
 483
 2,117
 1,447
 
Incurred activity 129
 70
 46
 28
 175
 98
(1) 
Paid activity (162) (118) (142) (101) (304) (219) 
Balance at December 31, 2019 $1,459
 $916
 $529
 $410
 $1,988
 $1,326
 
(1)     Excludes unallocated loss expenses and the net activity reflects third-party reinsurance other than the aggregate excess of loss reinsurance provided by National Indemnity Company (NICO) to Westchester Specialty (see Westchester Specialty section below).

(1)

F-64


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Excludes unallocated loss expenses and the net activity reflects third-party reinsurance other than the aggregate excess of loss reinsurance provided by National Indemnity Company (NICO) to Westchester Specialty (see Westchester Specialty section below).

The A&E net loss reserves including allocated loss expense reserves and provisionvaluation allowance for uncollectible reinsurance at December 31, 20192020 and 20182019 shown in the table above is comprised of:
December 31
(in millions of U.S. dollars)20202019
Brandywine operations$736 $754 
Westchester Specialty103 117 
Chubb Corp333 381 
Other, mainly Overseas General Insurance80 74 
Total$1,252 $1,326 
 December 31 
(in millions of U.S. dollars)2019
 2018
Brandywine operations$754
 $807
Westchester Specialty117
 120
Chubb Corp381
 442
Other, mainly Overseas General Insurance74
 78
Total$1,326
 $1,447


Brandywine Run-off entities The Restructuring Plan and uncertainties relating to Chubb's ultimate Brandywine exposure

In 1996, the Pennsylvania Insurance Commissioner approved a plan to restructure INA Financial Corporation and its subsidiaries (the Restructuring) which included the division of Insurance Company of North America (INA) into two separate corporations:

(1) An active insurance company that retained the INA name and continued to write P&C business; and
(2) An inactive run-off company, now called Century Indemnity Company (Century).

As a result of the division, predominantly all A&E and certain other liabilities of INA were ascribed to Century and extinguished, as a matter of Pennsylvania law, as liabilities of INA.

As part of the Restructuring, most A&E liabilities of various U.S. affiliates of INA were reinsured to Century. Century and certain other run-off companies having A&E and other liabilities were contributed to Brandywine Holdings.

The U.S.-based Chubb INA companies assumed two contractual obligations in respect of the Brandywine operations in connection with the Restructuring: a surplus maintenance obligation in the form of the excess of loss (XOL) agreement and a dividend retention fund obligation.



F-67


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



XOL Agreement
In 1996, in connection with the Restructuring, a Chubb INA insurance subsidiary provided reinsurance coverage to Century in the amount of $800 million under an Aggregate Excess of Loss Reinsurance Agreement (XOL Agreement), triggerable if the statutory capital and surplus of Century falls below $25 million or if Century lacks liquid assets with which to pay claims as they become due.

Dividend Retention Fund
INA Financial Corporation established and funded a dividend retention fund (the Dividend Retention Fund) consisting of $50 million plus investment earnings. The full balance of the Dividend Retention Fund was contributed to Century as of December 31, 2002. Under the Restructuring Order, while any obligation to maintain the Dividend Retention Fund is in effect, to the extent dividends are paid by INA Holdings Corporation to its parent, INA Financial Corporation, and to the extent INA Financial Corporation then pays such dividends to INA Corporation, a portion of those dividends must be withheld to replenish the principal of the Dividend Retention Fund to $50 million. During 2020, 2019, 2018, 2011 and 2010, $90$250 million,, $90 million, $50 million, $35 million and $15 million, respectively, were withheld from such dividends and deposited into the Dividend Retention Fund as a result of dividends paid up to the INA Corporation. Pursuant to a 2011 amendment to the Restructuring Order, capital contributions from the Dividend Retention Fund to Century are not required until the XOL Agreement has less than $200 million of capacity remaining on an incurred basis for statutory reporting purposes. The amount of the required capital contribution shall be the lesser of the amount necessary to restore the XOL Agreement remaining capacity to $200 million or the Dividend Retention Fund balance. In 2020 and 2019, and 2018, the Pennsylvania Departmentcapital contributions of Insurance approved a capital contribution of$302 million and $64 million and $39 million,were made, respectively, from the Dividend Retention Fund to Century in order to restore the XOL capacity to $200 million.Century. The Dividend Retention Fund may not be terminated without prior written approval from the Pennsylvania Insurance Commissioner.

Effective December 31, 2004, Chubb INA contributed $100 million to Century in exchange for a surplus note. After giving effect to the contribution and issuance of the surplus note, the statutory surplus of Century at December 31, 20192020 was $25 million and $622$573 million in statutory-basis losses have been ceded to the XOL Agreement on an inception-to-date basis. Century reports the amount ceded under the XOL Agreement in accordance with statutory accounting principles, which differ from GAAP

F-65


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

by, among other things, allowing Century to discount its liabilities, including certain asbestos related and environmental pollution liabilities and Century's reinsurance payable to active companies. For GAAP reporting purposes, intercompany reinsurance recoverables related to the XOL are eliminated upon consolidation.

While Chubb believes it has no legal obligation to fund Century losses above the XOL limit of coverage, Chubb's consolidated results would nevertheless continue to include any losses above the limit of coverage for so long as the Brandywine companies remain consolidated subsidiaries of Chubb.

Certain active Chubb companies are primarily liable for asbestos, environmental, and other exposures that they have reinsured to Century. Accordingly, if Century were to become insolvent and placed into rehabilitation or liquidation, some or all of the recoverables due to these active Chubb companies from Century could become uncollectible. At both December 31, 20192020 and 2018,2019, the aggregate reinsurance recoverables owed by Century to certain active Chubb companies were approximately $1.6 billion and $1.5 billion, respectively, on an undiscounted basis. Chubb believes the active company intercompany reinsurance recoverables, which relate to direct liabilities payable over many years, are not impaired. At December 31, 20192020 and 2018,2019, Century's carried gross reserves (including reserves assumed from the active Chubb companies) were $1.8$2.1 billion and $2.0$1.8 billion, respectively. Should Century's loss reserves experience adverse development in the future and should Century be placed into rehabilitation or liquidation, the reinsurance recoverables due from Century to certain active Chubb companies would be payable only after the payment in full of certain expenses and liabilities, including administrative expenses and direct policy liabilities. Thus, the intercompany reinsurance recoverables would be at risk to the extent of the shortage of assets remaining to pay these recoverables.

Westchester Specialty impact of NICO contracts on Chubb’s run-off entities

As part of the Westchester Specialty acquisition in 1998, NICO provided a 75 percent pro-rata share of $1.0 billion of reinsurance protection on losses and loss adjustment expenses incurred on or before December 31, 1996, in excess of a retention of $721 million. At December 31, 2019,2020, the remaining unused incurred limit under the Westchester NICO agreement was $384$372 million.



F-68


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



8. Taxation
8
. Taxation

Under Swiss law through December 31, 2019,2020, a resident company is subject to income tax at the federal, cantonal, and communal levels that is levied on net worldwide income. Income attributable to permanent establishments or real estate located abroad is excluded from the Swiss tax base. Chubb Limited is a holding company and, therefore, is exempt from cantonal and communal income tax. As a result, Chubb Limited is subject to Swiss income tax only at the federal level. Furthermore, participation relief (i.e., tax relief) is granted to Chubb Limited at the federal, cantonal, and communal level for qualifying dividend income and capital gains related to the sale of qualifying participations (i.e., subsidiaries). It is expected that the participation relief will result in a full exemption of participation income from federal income tax. Chubb Limited is subject to an annual cantonal and communal capital tax on the taxable equity of Chubb Limited in Switzerland.

Chubb has two Swiss operating subsidiaries, an insurance company, Chubb Insurance (Switzerland) Limited and a reinsurance company, Chubb Reinsurance (Switzerland) Limited. Both are subject to federal, cantonal, and communal income tax and to annual cantonal and communal capital tax.

Under current Bermuda law, Chubb Limited and its Bermuda subsidiaries are not required to pay any taxes on income or capital gains. If a Bermuda law were enacted that would impose taxes on income or capital gains, Chubb Limited and the Bermuda subsidiaries have received an undertaking from the Minister of Finance in Bermuda that would exempt such companies from Bermudian taxation until March 2035.

Income from Chubb's operations at Lloyd's is subject to United Kingdom (U.K.) corporation income taxes. Lloyd's is required to pay U.S. income tax on U.S. connected income (U.S. income) written by Lloyd's syndicates. Lloyd's has a closing agreement with the Internal Revenue Service (IRS) whereby the amount of tax due on this business is calculated by Lloyd's and remitted directly to the IRS. These amounts are then charged to the accounts of Chubb's Corporate Members in proportion to their participation in the relevant syndicates. Chubb's Corporate Members are subject to this arrangement but, as U.K. domiciled companies, will receive U.K. corporation tax credits for any U.S. income tax incurred up to the value of the equivalent U.K. corporation income tax charge on the U.S.this income.

Chubb Group Holdings and its respective subsidiaries are subject to income taxes imposed by U.S. authorities and file a consolidated U.S. Federal income tax return. Should Chubb Group Holdings pay a dividend to Chubb Limited, withholding taxes

F-66


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

would apply. Currently, however, no withholding taxes are accrued with respect to such un-remitted earnings as management has no intention of remitting these earnings. Similarly, no taxes have been provided on the un-remitted earnings of certain foreign subsidiaries (Hong Kong and Korea life insurance companies) as management has no intention of remitting these earnings. The cumulative amount that would be subject to withholding tax, if distributed, as well as the determination of the associated tax liability are not practicable to compute; however, such amount would be material.

Certain international operations of Chubb are also subject to income taxes imposed by the jurisdictions in which they operate.

Chubb's domestic operations are in Switzerland, the jurisdiction where we are legally organized, incorporated, and registered.


F-69


Swiss tax reform legislation effective in 2020, the Swiss tax rate increased from 7.83 percent in years 2018 and 2019 to 21.2 percent in 2020.
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS
(continued)
Chubb Limited and Subsidiaries



The following table presents pre-tax income and the related provision for income taxes:
Year Ended December 31
(in millions of U.S. dollars)202020192018
Pre-tax income:
      Switzerland$350 $440 $950 
      Outside Switzerland3,812 4,809 3,707 
      Total pre-tax income$4,162 $5,249 $4,657 
Provision for income taxes
Current tax expense:
      Switzerland$52 $29 $89 
      Outside Switzerland876 879 563 
      Total current tax expense928 908 652 
Deferred tax expense (benefit):
      Switzerland2 11 
      Outside Switzerland(301)(124)40 
      Total deferred tax expense (benefit)(299)(113)43 
Provision for income taxes$629 $795 $695 
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Pre-tax income:     
      Switzerland$440
 $950
 $527
      Outside Switzerland4,809
 3,707
 3,195
      Total pre-tax income$5,249
 $4,657
 $3,722
Provision for income taxes     
Current tax expense:     
      Switzerland$29
 $89
 $46
      Outside Switzerland879
 563
 313
      Total current tax expense908
 652
 359
Deferred tax expense (benefit):     
      Switzerland11
 3
 2
      Outside Switzerland(124) 40
 (500)
      Total deferred tax expense (benefit)(113) 43
 (498)
Provision for income taxes$795
 $695
 $(139)

The most significant jurisdictions contributing to the overall taxation of Chubb are calculated using the following rates in 2019:2020: Switzerland 7.83 percent, Bermuda 0.021.2 percent, U.S. 21.0 percent, and U.K. 19.0 percent, and Bermuda 0.0 percent.

The following table presents a reconciliation of the difference between the provision for income taxes and the expected tax provision at the Swiss statutory income tax rate:
Year Ended December 31
(in millions of U.S. dollars)20202019 2018 
Expected tax provision at Swiss statutory tax rate$880 $411 $365 
Permanent differences:
Taxes on earnings subject to rate other than Swiss statutory rate(337)376 372 
Tax-exempt interest and dividends received deduction, net of proration(41)(49)(75)
Net withholding taxes67 40 33 
Share-based compensation(10)(12)(19)
Impact of 2017 Tax Act0 (25)
Other70 29 44 
Provision for income taxes$629 $795 $695 
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Expected tax provision at Swiss statutory tax rate$411
 $365
 $291
Permanent differences:     
Taxes on earnings subject to rate other than Swiss statutory rate376
 372
 263
Tax-exempt interest and dividends received deduction, net of proration(49) (75) (199)
Net withholding taxes40
 33
 30
Excess tax benefit on share-based compensation(12) (19) (48)
Impact of 2017 Tax Act
 (25) (450)
Corporate owned life insurance(13) 2
 (37)
Other42
 42
 11
Provision for income taxes$795
 $695
 $(139)


The 2017 Tax Act, enacted in December 2017, among other things, reduced the U.S. Federal income tax rate from 35 percent to 21 percent effective in 2018. In the fourth quarter of 2017, we recorded a $450 million income tax benefit on a provisional basis, and an additional $25 million in 2018, principally reflecting this reduction in the U.S. corporate tax rate from 35 percent to 21 percent. Our final $475 million income tax benefit was comprised of a $743 million reduction in the deferred tax liabilities principally related to certain intangible assets, a $250 million reduction in net deferred tax assets related to other net assets, a net charge of $18 million related to the impact of excess foreign tax credits, withholding taxes associated with unremitted earnings and the impact of the reduced rate on our foreign branches. The 2018 change reflected the favorable impact of changes to certain tax only accounting methods offset by updates to provisional amounts recorded related to foreign tax credits and withholding taxes as a result of additional guidance issued during 2018.



F-70F-67


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The following table presents the components of net deferred tax assets and liabilities:
December 31December 31
(in millions of U.S. dollars)2020 2019 
Deferred tax assets:
Loss reserve discount$884 $826 
Unearned premiums reserve496 519 
Foreign tax credits222 247 
Provision for uncollectible balances46 37 
Loss carry-forwards123 143 
Debt related amounts69 74 
Compensation related amounts281 261 
Cumulative translation adjustments120 33 
Investments75 
Lease liability121 140 
Total deferred tax assets2,437 2,280 
Deferred tax liabilities:
Deferred policy acquisition costs522 588 
Other intangible assets, including VOBA1,425 1,468 
Un-remitted foreign earnings77 73 
Investments0 40 
Unrealized appreciation on investments957 470 
Depreciation123 157 
Lease right-of-use asset111 129 
Other, net31 45 
Total deferred tax liabilities3,246 2,970 
Valuation allowance83 114 
Net deferred tax liabilities$(892)$(804)
 December 31
 December 31
(in millions of U.S. dollars)2019
 2018
Deferred tax assets:   
Loss reserve discount$826
 $584
Unearned premiums reserve519
 471
Foreign tax credits247
 262
Provision for uncollectible balances37
 37
Loss carry-forwards143
 137
Debt related amounts74
 71
Compensation related amounts261
 263
Cumulative translation adjustments33
 43
Unrealized depreciation on investments
 102
Lease liability140
 
Other, net
 95
Total deferred tax assets2,280
 2,065
Deferred tax liabilities:   
Deferred policy acquisition costs588
 621
Other intangible assets, including VOBA1,468
 1,440
Un-remitted foreign earnings73
 47
Investments40
 59
Unrealized appreciation on investments470
 
Depreciation157
 123
Lease right-of-use asset129
 
Other, net45
 
Total deferred tax liabilities2,970
 2,290
Valuation allowance114
 79
Net deferred tax liabilities$(804) $(304)


The 2017 Tax Act also included provisions for Global Intangible Low-Taxed Income (GILTI) under which taxes may be imposed on income of foreign subsidiaries and for a Base Erosion and Anti-Abuse Tax (BEAT) under which taxes may be imposed on certain payments to affiliated foreign companies. We have evaluated the accounting policy election required with regard to the GILTI and BEAT provisions, and have concluded we will treat both as a period cost. As a result, we have recorded no related deferred taxes.

The valuation allowance of $83 million and $114 million at December 31, 2020 and 2019, and $79 million at December 31, 2018,respectively, reflects management's assessment, based on available information, that it is more likely than not that a portion of the deferred tax assets will not be realized due to the inability of certain foreignnon-U.S. subsidiaries to generate sufficient taxable income. Adjustments to the valuation allowance are made when there is a change in management's assessment of the amount of deferred tax assets that are realizable.

At December 31, 2019,2020, Chubb has net operating loss carry-forwards of $496$407 million which, if unused, will expire starting in 2020,2021, and a foreign tax credit carry-forward in the amount of $247$222 million which, if unused, will expire starting in 2026.



F-71


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents a reconciliation of the beginning and ending amount of gross unrecognized tax benefits:
December 31December 31
(in millions of U.S. dollars)2020 2019 
Balance, beginning of year$47 $14 
Additions based on tax positions related to the current year5 12 
Additions based on tax positions related to prior years24 23 
Reductions for the lapse of the applicable statutes of limitations0 (2)
Balance, end of year$76 $47 
 December 31
 December 31
(in millions of U.S. dollars)2019
 2018
Balance, beginning of year$14
 $13
Additions based on tax positions related to the current year12
 1
Additions based on tax positions related to prior years23
 
Reductions for tax positions of prior years
 
Reductions for the lapse of the applicable statutes of limitations(2) 
Balance, end of year$47
 $14


At December 31, 20192020 and 2018,2019, the gross unrecognized tax benefits of $47$76 million and $14$47 million, respectively, can be reduced by $19$31 million and nil,$19 million, respectively, associated with foreign tax credits. The net amounts of $28$45 million and $14$28 million at December 31, 20192020 and 2018,2019, respectively, if recognized, would favorably affect the effective tax rate. We

F-68


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

made a settlement of a liability in January 2021 for $23 million, including interest. It is reasonably possible that over the next twelve months, that the amount of unrecognized tax benefits may change further resulting from the re-evaluation of unrecognized tax benefits arising from examinations by taxing authorities and the lapses of statutes of limitations.

Chubb recognizes accruals for interest and penalties, if any, related to unrecognized tax benefits in income tax expense in the Consolidated statements of operations. Tax-related interest expense (income) and penalties reported in the Consolidated statements of operations were $8 million at December 31, 2020, $5 million at December 31, 2019, and were immaterial for 2018, and 2017.2018. Liabilities for tax-related interest and penalties in our Consolidated balance sheets were $8$16 million and $3$8 million at December 31, 20192020 and 2018,2019, respectively.

In March 2017, the IRS commenced its field examination of Chubb Group Holdings’ U.S. Federal income tax returns for 2014 and 2015 and Chubb Corp’s U.S. Federal income tax return for 2014.2015. The Chubb Group Holdings examination for 2014 and 2015 tax years is still ongoing with no material adjustments proposed to date. In February 2019,July 2020, the IRS completedcommenced its examinationsfield examination of Chubb Corp's 2014 return with no material adjustments. Chubb Corp'sGroup Holdings' U.S. Federal income tax returns for 20152016, 2017 and the short period return for 2016 were not examined by the IRS and the statute of limitations for those years closed during 2019. In September 2019, we were notified by the IRS of its intention to examine the 2016 and 2017 tax returns of Chubb Group Holdings. That examination is yet to begin.2018. As a multinational company, we also have examinations under way in several foreign jurisdictions. With few exceptions, Chubb is no longer subject to income tax examinations for years prior to 2010.

The following table summarizes tax years open for examination by major income tax jurisdiction:
At December 31, 2020
Australia2014-2020
Canada2012-2020
France2018-2020
Germany2015-2020
Italy2010-2020
Mexico2014-2020
Spain2012-2020
Switzerland2016-2020
United Kingdom2015-2020
United States2014-2020
At December 31, 2019   
Australia2014-2019
Canada2012-2019
France2017-2019
Germany2015-2019
Italy2010-2019
Mexico2014-2019
Spain2012-2019
Switzerland2015-2019
United Kingdom2015-2019
United States2014-2019


F-69


F-72


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



9. Debt
 December 31
 December 31
  
(in millions of U.S. dollars)2019
 2018
 Early Redemption Option
Repurchase agreements (weighted average interest rate of 2.2% in 2019 and 2.5% in 2018)
$1,416

$1,418
 None
Short-term debt     
Chubb INA senior notes:     
$500 million 5.9% due June 2019$
 $500
 Make-whole premium plus 0.40%
$1,300 million 2.3% due November 20201,298
 
 Make-whole premium plus 0.15%
Other short-term debt (2.75% to 7.1% due December 2019 to September 2020)1
 9
 None
Total short-term debt$1,299
 $509
  
Long-term debt     
Chubb INA senior notes:     
$1,300 million 2.3% due November 2020$
 $1,297
 Make-whole premium plus 0.15%
$1,000 million 2.875% due November 2022997
 996
 Make-whole premium plus 0.20%
$475 million 2.7% due March 2023473
 473
 Make-whole premium plus 0.10%
$700 million 3.35% due May 2024697
 696
 Make-whole premium plus 0.15%
€700 million 0.3% due December 2024

776
 
 Make-whole premium plus 0.15%
$800 million 3.15% due March 2025796
 796
 Make-whole premium plus 0.15%
$1,500 million 3.35% due May 20261,492
 1,491
 Make-whole premium plus 0.20%
€575 million 0.875% due June 2027

635
 
 Make-whole premium plus 0.20%
€900 million 1.55% due March 2028993
 1,008
 Make-whole premium plus 0.15%
$100 million 8.875% due August 2029100
 100
 None
€700 million 0.875% due December 2029

775
 
 Make-whole premium plus 0.20%
€575 million 1.4% due June 2031
633
 
 Make-whole premium plus 0.25%
$200 million 6.8% due November 2031246
 250
 Make-whole premium plus 0.25%
$300 million 6.7% due May 2036297
 297
 Make-whole premium plus 0.20%
$800 million 6.0% due May 2037953
 962
 Make-whole premium plus 0.20%
€900 million 2.5% due March 2038992
 1,008
 Make-whole premium plus 0.25%
$600 million 6.5% due May 2038751
 759
 Make-whole premium plus 0.30%
$475 million 4.15% due March 2043470
 470
 Make-whole premium plus 0.15%
$1,500 million 4.35% due November 20451,483
 1,483
 Make-whole premium plus 0.25%
Other long-term debt (2.75% due September 2020)
 1
 None
Total long-term debt$13,559
 $12,087
  
Trust preferred securities     
Chubb INA capital securities due April 2030$308
 $308
 
Redemption prices(1)

(1)
Redemption prices are equal to accrued and unpaid interest to the redemption date plus the greater of (i) 100 percent of the principal amount thereof, or (ii) sum of present value of scheduled payments of principal and interest on the capital securities from the redemption date to April 1, 2030.


9. Debt

F-73


December 31December 31
(in millions of U.S. dollars)20202019Early Redemption Option
Repurchase agreements (weighted average interest rate of 0.3% in 2020 and 2.2% in 2019)$1,405$1,416None
Short-term debt
Chubb INA:
$1,300 million 2.3% due November 2020$0$1,298Make-whole premium plus 15 bps
Other short-term debt 2.75% due September 202001None
Total short-term debt$0$1,299
Long-term debt
Chubb INA:
$1,000 million 2.875% senior notes due November 2022$998$997Make-whole premium plus 20 bps
$475 million 2.7% senior notes due March 2023474473Make-whole premium plus 10 bps
$700 million 3.35% senior notes due May 2024698697Make-whole premium plus 15 bps
€700 million 0.3% senior notes due December 2024841776Make-whole premium plus 15 bps
$800 million 3.15% senior notes due March 2025797796Make-whole premium plus 15 bps
$1,500 million 3.35% senior notes due May 20261,4931,492Make-whole premium plus 20 bps
€575 million 0.875% senior notes due June 2027691635Make-whole premium plus 20 bps
€900 million 1.55% senior notes due March 20281,079993Make-whole premium plus 15 bps
$100 million 8.875% debentures due August 2029100100None
€700 million 0.875% senior notes due December 2029840775Make-whole premium plus 20 bps
$1,000 million 1.375% senior notes due September 20309910Make-whole premium plus 15 bps
€575 million 1.4% senior notes due June 2031687633Make-whole premium plus 25 bps
$200 million 6.8% debentures due November 2031242246Make-whole premium plus 25 bps
$300 million 6.7% senior notes due May 2036298297Make-whole premium plus 20 bps
$800 million 6.0% senior notes due May 2037945953Make-whole premium plus 20 bps
€900 million 2.5% senior notes due March 20381,077992Make-whole premium plus 25 bps
$600 million 6.5% senior notes due May 2038743751Make-whole premium plus 30 bps
$475 million 4.15% senior notes due March 2043470470Make-whole premium plus 15 bps
$1,500 million 4.35% senior notes due November 20451,4841,483Make-whole premium plus 25 bps
Total long-term debt$14,948$13,559
Trust preferred securities
Chubb INA capital securities due April 2030$308$308
Redemption prices(1)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(1)(continued)Redemption prices are equal to accrued and unpaid interest to the redemption date plus the greater of (i) 100 percent of the principal amount thereof, or (ii) sum of present value of scheduled payments of principal and interest on the capital securities from the redemption date to April 1, 2030.
Chubb Limited and Subsidiaries



a) Repurchase agreements
Chubb has executed repurchase agreements with certain counterparties under which Chubb agreed to sell securities and repurchase them at a future date for a predetermined price.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

b) Short-term debt
Short-term debt comprises the current maturities of our long-term debt instruments described below. These short-term debt instruments were reclassified from long-term debt during 2019 and are reflected in the table above. Chubb INA Holdings Inc.'s (Chubb INA) $500$1,300 million of 5.92.3 percent senior notes due June 2019November 2020 was paid upon maturity.

c) Long-term debt
CertainThe $100 million of 8.875 percent debentures due August 2029 do not have an early redemption option. The remaining Chubb INA'sINA senior notes and debentures, including the $1,000 million of 1.375 percent senior notes issued September 2020, andcapital securities are redeemable at any time at Chubb INA's option subject to the provisions described in the table above. A "make-whole" premium is the present value of the remaining principal and interest discounted at the applicable U.S. Treasury rate. The senior notes and capitalThese debt securities are also redeemable at par plus accrued and unpaid interest in the event of certain changes in tax law.

The senior notes and debentures do not have the benefit of any sinking fund. These senior unsecured notesfund and are guaranteed on a senior basis by Chubb Limited and they rank equally with all of Chubb's other senior obligations. They also contain customary limitations on lien provisions as well as customary events of default provisions which, if breached, could result in the accelerated maturity of such senior debt.

In June 2019, Chubb INA issued €575 million ($650 million based on the foreign exchange rate at the date of issuance) of 0.875 percent Euro denominated senior notes due June 2027 and €575 million ($650 million based on the foreign exchange rate at the date of issuance) of 1.4 percent Euro denominated senior notes due June 2031.

In December 2019, Chubb INA issued €700 million ($779 million based on the foreign exchange rate at the date of issuance) of 0.30 percent Euro denominated senior notes due December 2024 and €700 million ($779 million based on the foreign exchange rate at the date of issuance) of 0.875 percent Euro denominated senior notes due December 2029.

These senior notes are redeemable at any time at Chubb INA's option subject to a “make-whole” premium (the present value of the remaining principal and interest discounted at the applicable comparable government bond rate plus 15 basis points for the senior notes due 2024, 20 basis points for the senior notes due 2027 and 2029 and 25 basis points for the senior notes due 2031). The notes are also redeemable at par plus accrued and unpaid interest in the event of certain changes in tax law. These notes do not have the benefit of any sinking fund. These senior unsecured notes are guaranteed on a senior basis by Chubb and they rank equally with all of Chubb's other senior obligations. They also contain customary limitations on lien provisions as well as customary events of default provisions which, if breached, could result in the accelerated maturity of such senior debt.

d) Trust preferred securities
In March 2000, ACE Capital Trust II, a Delaware statutory business trust, publicly issued $300 million of 9.7 percent Capital Securities (the Capital Securities) due to mature in April 2030. At the same time, Chubb INA purchased $9.2 million of common securities of ACE Capital Trust II. The sole assets of ACE Capital Trust II consist of $309 million principal amount of 9.7 percent Junior Subordinated Deferrable Interest Debentures (the Subordinated Debentures) issued by Chubb INA due to mature in April 2030.

Distributions on the Capital Securities are payable semi-annually and may be deferred for up to ten consecutive semi-annual periods (but no later than April 1, 2030). Any deferred payments would accrue interest compounded semi-annually if Chubb INA defers interest on the Subordinated Debentures. Interest on the Subordinated Debentures is payable semi-annually. Chubb INA may defer such interest payments (but no later than April 1, 2030), with such deferred payments accruing interest compounded semi-annually. The Capital Securities and the ACE Capital Trust II Common Securities will be redeemed upon repayment of the Subordinated Debentures.

Chubb Limited has guaranteed, on a subordinated basis, Chubb INA's obligations under the Subordinated Debentures, and distributions and other payments due on the Capital Securities. These guarantees, when taken together with Chubb's obligations under expense agreements entered into with ACE Capital Trust II, provide a full and unconditional guarantee of amounts due on the Capital Securities.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



10.10. Commitments, contingencies, and guarantees

a) Derivative instruments
Foreign currency management
As a global company, Chubb entities transact business in multiple currencies. Our policy is to generally match assets, liabilities, and required capital for each individual jurisdiction in local currency, which would include the use of derivatives discussed below. We do not hedge our net asset non-U.S. dollar capital positions; however, we do consider economic hedging for planned cross border transactions.

Derivative instruments employed
Chubb maintains positions in derivative instruments such as futures, options, swaps, and foreign currency forward contracts for which the primary purposes are to manage duration and foreign currency exposure, yield enhancement, or to obtain an exposure to a particular financial market. Chubb also maintains positions in convertible securities that contain embedded derivatives. Investment derivative instruments are recorded in either Other assets (OA) or Accounts payable, accrued expenses, and other liabilities (AP), convertible bonds are recorded in Fixed maturities available for sale (FM AFS), and convertible equity securities are recorded in Equity securities (ES) in the Consolidated balance sheets. These are the most numerous and frequent derivative transactions. In addition, Chubb purchases to be announced mortgage-backed securities (TBAs) as part of its investing activities.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Under reinsurance programs covering GLBs, Chubb assumes the risk of GLBs, (principally GMIB)principally GMIB, associated with variable annuity contracts. The GMIB risk is triggered if, at the time the contract holder elects to convert the accumulated account value to a periodic payment stream (annuitize), the accumulated account value is not sufficient to provide a guaranteed minimum level of monthly income. The GLB reinsurance product meets the definition of a derivative instrument. Benefit reserves in respect of GLBs are classified as Future policy benefits (FPB) while the fair value derivative adjustmentinstrumentand is classified within AP. Chubb also generally maintains positions in exchange-traded equity futures contracts on equity market indices to limit equity exposure in the GMDB and GLB book of business. All derivative instruments are carried at fair value with changes in fair value recorded in Net realized gains (losses) in the Consolidated statements of operations. None of the derivative instruments are designated as hedges for accounting purposes. The following table presents the balance sheet locations, fair values of derivative instruments in an asset or (liability) position, and notional values/payment provisions of our derivative instruments: 
   December 31, 2019   December 31, 2018 
 Consolidated
Balance Sheet
Location
 Fair Value  Notional
Value/
Payment
Provision

  Fair Value  Notional
Value/
Payment
Provision

  Derivative Asset
 Derivative (Liability)
   Derivative Asset
 Derivative (Liability)
 
(in millions of U.S. dollars)       
Investment and embedded derivative instruments:              
Foreign currency forward contractsOA / (AP) $11
 $(78) $2,579
  $15
 $(19) $2,185
Cross-currency swapsOA / (AP) 
 
 
  
 
 45
Interest rate swapsOA / (AP) 
 
 
  
 (115) 5,250
Options/Futures contracts on notes, bonds, and equitiesOA / (AP) 13
 (15) 1,615
  13
 (19) 1,046
Convertible securities (1)
FM AFS / ES 4
 
 5
  9
 
 11
TBAsFM AFS 
 
 
  6
 
 6
   $28
 $(93) $4,199
  $43
 $(153) $8,543
Other derivative instruments:              
Futures contracts on equities (2)
OA / (AP) $
 $(13) $613
  $23
 $
 $507
OtherOA / (AP) 2
 
 63
  2
 
 74
   $2
 $(13) $676
  $25
 $
 $581
GLB (3)
(AP) / (FPB) $
 $(897) $1,510
  $
 $(861) $1,750
(1)
Includes fair value of embedded derivatives.
(2)
Related to GMDB and GLB book of business.
(3)
Includes both future policy benefits reserves of $441 million and $409 million and fair value derivative adjustment of $456 million and $452 million at December 31, 2019 and 2018, respectively. Refer to Note 5c) for additional information. Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.


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December 31, 2020December 31, 2019
Consolidated
Balance Sheet
Location
Fair ValueNotional
Value/
Payment
Provision
Fair ValueNotional
Value/
Payment
Provision
Derivative AssetDerivative (Liability)Derivative AssetDerivative (Liability)
(in millions of U.S. dollars)
Investment and embedded derivative instruments:
Foreign currency forward contractsOA / (AP)$22 $(49)$2,807 $11 $(78)$2,579 
Options/Futures contracts on notes, bonds, and equitiesOA / (AP)13 (3)1,749 13 (15)1,615 
Convertible securities (1)
FM AFS / ES9 0 11 
$44 $(52)$4,567 $28 $(93)$4,199 
Other derivative instruments:
Futures contracts on equities (2)
OA / (AP)$0 $(17)$709 $$(13)$613 
OtherOA / (AP)0 0 16 63 
$0 $(17)$725 $$(13)$676 
GLB (3)
(AP)$0 $(1,089)$1,658 $$(897)$1,510 
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(1)(continued)Includes fair value of embedded derivatives.
Chubb Limited(2)Related to GMDB and SubsidiariesGLB book of business.

(3)Note that the payment provision related to GLB is the net amount at risk. The concept of a notional value does not apply to the GLB reinsurance contracts.



At December 31, 2020 and 2019, and 2018,net derivative liabilities of $75$30 million and $95$75 million, respectively, included in the table above were subject to a master netting agreement. The remaining derivatives included in the table above were not subject to a master netting agreement. 

b) Derivative instrument objectives
(i) Foreign currency exposure management
A foreign currency forward contract (forward) is an agreement between participants to exchange specific foreign currencies at a future date. Chubb uses forwards to minimize the effect of fluctuating foreign currencies as discussed above.

(ii) Duration management and market exposure
Futures
Futures contracts give the holder the right and obligation to participate in market movements, determined by the index or underlying security on which the futures contract is based. Settlement is made daily in cash by an amount equal to the change in value of the futures contract times a multiplier that scales the size of the contract. Exchange-traded futures contracts on money market instruments, notes and bonds are used in fixed maturity portfolios to more efficiently manage duration, as substitutes for ownership of the money market instruments, bonds and notes without significantly increasing the risk in the portfolio. Investments in futures contracts may be made only to the extent that there are assets under management not otherwise committed.

Exchange-traded equity futures contracts are used to limit exposure to a severe equity market decline, which would cause an increase in expected claims and therefore, an increase in future policy benefit reserves for GMDB and an increase in the fair value liability for GLB reinsurance business.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Options
An option contract conveys to the holder the right, but not the obligation, to purchase or sell a specified amount or value of an underlying security at a fixed price. Option contracts are used in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the duration of the fixed maturity portfolio. By using options in the portfolio, the overall interest rate sensitivity of the portfolio can be reduced. Option contracts may also be used as an alternative to futures contracts in the synthetic strategy as described above.

The price of an option is influenced by the underlying security, expected volatility, time to expiration, and supply and demand.
The credit risk associated with the above derivative financial instruments relates to the potential for non-performance by counterparties. Although non-performance is not anticipated, in order to minimize the risk of loss, management monitors the creditworthiness of its counterparties and obtains collateral. The performance of exchange-traded instruments is guaranteed by the exchange on which they trade. For non-exchange-traded instruments, the counterparties are principally banks which must meet certain criteria according to our investment guidelines.

Interest rate swaps
An interest rate swap is a contract between two counterparties in which interest payments are made based on a notional principal amount, which itself is never paid or received. Under the terms of an interest rate swap, one counterparty makes interest payments based on a fixed interest rate and the other counterparty’s payments are based on a floating rate. Interest rate swap contracts are used occasionally in our investment portfolio as protection against unexpected shifts in interest rates, which would affect the fair value of the fixed maturity portfolio. By using interest rate swaps in the portfolio, the overall duration or interest rate sensitivity of the portfolio can be impacted.

Cross-currency swaps
Cross-currency swaps are agreements under which two counterparties exchange interest payments and principal denominated in different currencies at a future date. We use cross-currency swaps to reduce the foreign currency and interest rate risk by converting cash flows back into local currency. We invest in foreign currency denominated investments to improve credit diversification and also to obtain better duration matching to our liabilities that is limited in the local currency market.

Other
Included within Other are derivatives intended to reduce potential losses which may arise from certain exposures in our insurance business. The economic benefit provided by these derivatives is similar to purchased reinsurance. For example, Chubb may enter into crop derivative contracts to protect underwriting results in the event of a significant decline in commodity prices.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries




(iii) Convertible security investments
A convertible security is a debt instrument or preferred stock that can be converted into a predetermined amount of the issuer’s equity. The convertible option is an embedded derivative within the host instruments which are classified in the investment portfolio as either available for sale or as an equity security. Chubb purchases convertible securities for their total return and not specifically for the conversion feature.

(iv) TBA
By acquiring TBAs, we make a commitment to purchase a future issuance of mortgage-backed securities. For the period between purchase of the TBAs and issuance of the underlying security, we account for our position as a derivative in the consolidated financial statements.Consolidated Financial Statements. Chubb purchases TBAs both for their total return and for the flexibility they provide related to our mortgage-backed security strategy.

(v) GLB
Under the GLB program, as the assuming entity, Chubb is obligated to provide coverage until the expiration or maturity of the underlying deferred annuity contracts or the expiry of the reinsurance treaty. Premiums received under the reinsurance treaties are classifiedThe GLB is accounted for as premium. Expected losses allocated to premiums received are classified as Future policy benefitsa derivative and valued similar to GMDB reinsurance. Other changes inis recorded at fair value arise principally from changes in expected losses allocated to expected future premiums.value. Fair value represents management’s estimate of an exit price and thus, includes a risk margin. We may recognize a realized loss for other changes in fair value due to adverse changes in the capital markets (e.g., declining interest rates and/or declining U.S. and/or international equity markets) and changes in actual or estimated future policyholder behavior (e.g., increased annuitization or decreased lapse rates) although we expect the business to be profitable.

To mitigate adverse changes in the capital markets, we maintain positions in exchange-traded equity futures contracts, as noted under section "(ii) Futures" above. These futures increase in fair value when the S&P 500 index decreases (and decrease in fair

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

value when the S&P 500 index increases). The net impact of gains or losses related to changes in fair value of the GLB liability and the exchange-traded equity futures are included in Net realized gains (losses).

c) Securities lending and secured borrowings
Chubb participates in a securities lending program operated by a third-party banking institution whereby certain assets are loaned to qualified borrowers and from which we earn an incremental return. The securities lending collateral can only be drawn down by Chubb in the event that the institution borrowing the securities is in default under the lending agreement. An indemnification agreement with the lending agent protects us in the event a borrower becomes insolvent or fails to return any of the securities on loan. The collateral is recorded in Securities lending collateral and the liability is recorded in Securities lending payable in the Consolidated balance sheets. The following table presents the carrying value of collateral held under securities lending agreements by investment category and remaining contractual maturity of the underlying agreements:
 Remaining contractual maturity 
 December 31, 2019
 December 31, 2018
(in millions of U.S. dollars)Overnight and Continuous 
Collateral held under securities lending agreements:   
Cash$346
 $756
U.S. Treasury and agency6
 64
Foreign595
 795
Corporate securities5
 15
Mortgage-backed securities18
 45
Equity securities24
 251
 $994
 $1,926
Gross amount of recognized liability for securities lending payable$994
 $1,926

Remaining contractual maturity
December 31, 2020December 31, 2019
(in millions of U.S. dollars)Overnight and Continuous
Collateral held under securities lending agreements:
Cash$551 $346 
U.S. Treasury / Agency148 
Non-U.S.1,032 595 
Corporate and asset-backed securities30 
Mortgage-backed securities4 18 
Equity securities79 24 
$1,844 $994 
Gross amount of recognized liability for securities lending payable$1,844 $994 
At December 31, 20192020 and 2018,2019, our repurchase agreement obligations of $1,416$1,405 million and $1,418$1,416 million, respectively, were fully collateralized. In contrast to securities lending programs, the use of cash received is not restricted for the repurchase obligations. The fair value of the underlying securities sold remains in Fixed maturities available for sale, and the repurchase agreement obligation is recorded in Repurchase agreements in the Consolidated balance sheets.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents the carrying value of collateral pledged under repurchase agreements by investment category and remaining contractual maturity of the underlying agreements:
Remaining contractual maturity
December 31, 2020December 31, 2019
30-90 DaysGreater than 90 DaysUp to 30 Days30-90 DaysGreater than 90 DaysTotal
(in millions of U.S. dollars)Total
Collateral pledged under repurchase agreements:
Cash$0 $4 $4 $$$$
U.S. Treasury / Agency0 106 106 107 107 
Mortgage-backed securities481 871 1,352 399 476 480 1,355 
$481 $981 $1,462 $508 $476 $480 $1,464 
Gross amount of recognized liabilities for repurchase agreements$1,405 $1,416 
Difference (1)
$57 $48 
   Remaining contractual maturity 
   December 31, 2019  December 31, 2018 
 Up to 30 Days
 30-90 Days
 Greater than 90 Days
   30-90 Days
 Greater than 90 Days
 Total
(in millions of U.S. dollars)  Total
   
Collateral pledged under repurchase agreements:             
Cash$2
 $
 $
 $2
 $
 $
 $
U.S. Treasury and agency107
 
 
 107
 
 259
 259
Mortgage-backed securities399
 476
 480
 1,355
 496
 713
 1,209
 $508
 $476
 $480
 $1,464
 $496
 $972
 $1,468
Gross amount of recognized liabilities for repurchase agreements      $1,416
     $1,418
Difference (1)
      $48
     $50
(1)Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

(1)
Per the repurchase agreements, the amount of collateral posted is required to exceed the amount of gross liability.

Potential risks exist in our secured borrowing transactions due to market conditions and counterparty exposure. With collateral that we pledge, there is a risk that the collateral may not be returned at the expiration of the agreement. If the counterparty fails to return the collateral, Chubb will have free use of the borrowed funds until our collateral is returned. In addition, we may encounter the risk that Chubb may not be able to renew outstanding borrowings with a new term or with an existing counterparty due to market conditions including a decrease in demand as well as more restrictive terms from banks due to

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

increased regulatory and capital constraints. Should this condition occur, Chubb may seek alternative borrowing sources or reduce borrowings. Additionally, increased margins and collateral requirements due to market conditions would increase our restricted assets as we are required to provide additional collateral to support the transaction.

The following table presents net realized gains (losses) related to derivative instrument activity in the Consolidated statements of operations:
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Investment and embedded derivative instruments:     
Foreign currency forward contracts$(79) $3
 $9
Interest rate swaps(270) (115) 
All other futures contracts, options, and equities(88) 39
 (21)
Convertible securities (1)
2
 (2) 1
Total investment and embedded derivative instruments$(435) $(75) $(11)
GLB and other derivative instruments:     
GLB (2)
$(4) $(248) $364
Futures contracts on equities (3)
(138) (4) (261)
Other(8) (3) (5)
Total GLB and other derivative instruments$(150) $(255) $98
 $(585) $(330) $87
(1)
Includes embedded derivatives.
(2)
Excludes foreign exchange gains (losses) related to GLB.
(3)
Related to GMDB and GLB book of business. 


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Year Ended December 31
(in millions of U.S. dollars)202020192018
Investment and embedded derivative instruments:
Foreign currency forward contracts$65 $(79)$
Interest rate swaps0 (270)(115)
All other futures contracts, options, and equities16 (88)39 
Convertible securities (1)
0 (2)
Total investment and embedded derivative instruments$81 $(435)$(75)
GLB and other derivative instruments:
GLB$(202)$(4)$(248)
Futures contracts on equities (2)
(108)(138)(4)
Other1 (8)(3)
Total GLB and other derivative instruments$(309)$(150)$(255)
$(228)$(585)$(330)
NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(1)(continued)Includes embedded derivatives.
Chubb Limited(2)Related to GMDB and SubsidiariesGLB book of business. 




d) Concentrations of credit risk
Our investment portfolio is managed following prudent standards of diversification. Specific provisions limit the allowable holdings of a single issue and issuer. We believe that there are no significant concentrations of credit risk associated with our investments. Our three largest corporate exposures by issuer at December 31, 2019,2020, were Wells Fargo & Co., Bank of America Corp, and JP Morgan Chase & Co. Our largest exposure by industry at December 31, 20192020 was financial services.

We market our insurance and reinsurance worldwide primarily through insurance and reinsurance brokers. We assume a degree of credit risk associated with brokers with whom we transact business. For the years ended December 31, 2020, 2019 and 2018, approximately 12 percent, 12 percent, and 10 percent, respectively, of our gross premiums written was generated from or placed by Marsh & McLennan Companies, Inc. This entity is a large, well-established company, and there are no indications that it is financially troubled at December 31, 2019.2020. No other broker or one insured accounted for more than 10 percent of our gross premiums written for the year ended December 31, 2017.these years.

As discussed in Note 2, we committed to purchase an additional 22.4 percent interest in Huatai Group. In connection with these purchase agreements, in January 2020, we paid collateralized deposits totaling $1.550 billion to the selling shareholders, which are accounted for as loans. There is credit exposure with the current selling shareholders until the obligations under the purchase agreements are satisfied, which is expected by the end of 2021.
e) Fixed maturities
At December 31, 2019,2020, we have commitments to purchase fixed income securities of $731$605 million over the next several years.

f) Other investments
At December 31, 2019,2020, included in Other investments in the Consolidated balance sheet are investments in limited partnerships and partially-owned investment companies with a carrying value of $4.7$6.5 billion. In connection with these investments, we have commitments that may require funding of up to $3.3$3.2 billion over the next several years. At December 31, 2019, these investments had a carrying value of $4.7 billion with a commitment that may require funding of up to $3.3 billion.

g) Letters of credit
On October 25, 2017, we entered into aWe have access to capital markets and to credit facility that provides for up to $1.0 billion of availability, all of which may be used for the issuance of lettersfacilities with letter of credit andcapacity of $4.0 billion with a sub-limit of $1.9 billion for revolving loans. We have the ability to increase the capacity under our existing credit facility to $2.0 billion under certain conditions, but any such increase would not raise the sub-limit for revolving loans above $1.0 billion.credit. Our existing credit facility has afacilities have remaining termterms expiring inthrough October 2022. At December 31, 2019,2020, our LOC usage was $567 million.$1.7 billion.

h) Legal proceedings
Our insurance subsidiaries are subject to claims litigation involving disputed interpretations of policy coverages and, in some jurisdictions, direct actions by allegedly-injured persons seeking damages from policyholders. These lawsuits, involving claims on policies issued by our subsidiaries which are typical to the insurance industry in general and in the normal course of

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

business, are considered in our loss and loss expense reserves. In addition to claims litigation, we are subject to lawsuits and regulatory actions in the normal course of business that do not arise from or directly relate to claims on insurance policies. This category of business litigation typically involves, among other things, allegations of underwriting errors or misconduct, employment claims, regulatory activity, or disputes arising from our business ventures. In the opinion of management, our ultimate liability for these matters could be, but we believe is not likely to be, material to our consolidated financial condition and results of operations.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries




i) Lease commitments
At December 31, 2020 and 2019, the right-of-use asset was $473 million and $551 million, respectively, recorded within Other assets on the Consolidated balance sheets, and the lease liability was $517 million and $603 million, respectively, which was recorded within Accounts payable, accrued expenses, and other liabilities on the Consolidated balance sheet.sheets. These leases consist principally of real estate operating leases that are amortized on a straight-line basis over the term of the lease, which expire at various dates. As of December 31, 2019,2020, the weighted average remaining lease term and weighted average discount rate for the operating leases was 5.44.9 years and 2.72.6 percent, respectively. Rent expense was $152 million, $171 million, $169 million, and $211$169 million for the years ended December 31, 2020, 2019, and 2018, and 2017, respectively.

Future minimum lease payments under the operating leases are expected to be as follows:
For the years ending December 31
(in millions of U.S. dollars)
Undiscounted cash flows:
2021$150 
2022123 
202396 
202468 
202538 
Thereafter75 
Total undiscounted lease payments$550 
Less: Present value adjustment33 
Net lease liabilities reported as of December 31, 2020$517 
For the years ending December 31
(in millions of U.S. dollars)
Undiscounted cash flows: 
2020$158
2021136
2022107
202388
202466
Thereafter105
Total undiscounted lease payments$660
Less: Present value adjustment57
Net lease liabilities reported as of December 31, 2019$603


11. Shareholders’ equity
11
. Shareholders’ equity

a) Common Shares
All of Chubb’s Common Shares are authorized under Swiss corporate law. Though the par value of Common Shares is stated in Swiss francs, Chubb continues to use U.S. dollars as its reporting currency for preparing the consolidated financial statements.Consolidated Financial Statements. Under Swiss corporate law, we are generally prohibited from issuing Common Shares below their par value. If there were a need to raise common equity at a time when the trading price of Chubb's Common Shares is below par value, we would need in advance to obtain shareholder approval to decrease the par value of the Common Shares.

Dividend approval
At our May 20182019 and 20172018 annual general meetings, our shareholders approved an annual dividenddividends for the following year of up to $2.92$3.00 per share and $2.84$2.92 per share, respectively, which waswere paid in four quarterly installments of $0.73$0.75 per share and $0.71$0.73 per share, respectively, at dates determined by the Board of Directors (Board) after the annual general meeting by way of a distribution from capital contribution reserves, transferred to free reserves for payment.

At our May 20192020 annual general meeting, our shareholders approved an annual dividend for the following year of up to $3.00$3.12 per share, expected to be paid in four quarterly installments of $0.75$0.78 per share after the annual general meeting by way of distribution from capital contribution reserves, transferred to free reserves for payment. The Board will determine the record and payment dates at which the annual dividend may be paid until the date of the 20202021 annual general meeting, and is authorized to abstain from distributing a dividend at its discretion. The first three quarterly installments each of $0.75$0.78 per share, have been distributed by the Board as expected.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Dividend distributions
Under Swiss corporate law, dividends must be stated in Swiss francs though dividend payments are made by Chubb in U.S. dollars. We issue dividends without subjecting them to withholding tax by way of distributions from capital contribution reserves and payment out of free reserves.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents dividend distributions per Common Share in Swiss francs (CHF) and U.S. dollars (USD):
Year Ended December 31
202020192018
CHFUSDCHFUSDCHFUSD
Total dividend distributions per common share2.89 $3.09 2.94 $2.98 2.84 $2.90 
 Year Ended December 31 
   2019
   2018
   2017
 CHF
 USD
 CHF
 USD
 CHF
 USD
Total dividend distributions per common share2.94
 $2.98
 2.84
 $2.90
 2.76
 $2.82


b) Shares issued, outstanding, authorized, and conditional
Year Ended December 31
202020192018
Common Shares authorized and issued, beginning of year479,783,864 479,783,864 479,783,864 
Cancellation of treasury shares(2,178,600)
Common Shares authorized and issued, end of year477,605,264 479,783,864 479,783,864 
Common Shares in treasury, beginning of year (at cost)(27,812,297)(20,580,486)(15,950,685)
Net shares issued under employee share-based compensation plans2,345,208 3,210,427 3,089,234 
Shares repurchased(3,584,150)(10,442,238)(7,719,035)
Cancellation of treasury shares2,178,600 
Common Shares in treasury, end of year (at cost)(26,872,639)(27,812,297)(20,580,486)
Common Shares outstanding, end of year450,732,625 451,971,567 459,203,378 
 Year Ended December 31 
 2019
 2018
 2017
Shares issued, beginning and end of year479,783,864
 479,783,864
 479,783,864
Common Shares in treasury, beginning of year (at cost)(20,580,486) (15,950,685) (13,815,148)
Net shares issued under employee share-based compensation plans3,210,427
 3,089,234
 3,731,075
Shares repurchased(10,442,238) (7,719,035) (5,866,612)
Common Shares in treasury, end of year (at cost)(27,812,297) (20,580,486) (15,950,685)
Shares issued and outstanding, end of year451,971,567
 459,203,378
 463,833,179


Increases in Common Shares in treasury are due to open market repurchases of Common Shares and the surrender of Common Shares to satisfy tax withholding obligations in connection with the vesting of restricted stock and the forfeiture of unvested restricted stock. Decreases in Common Shares in treasury are principally due to grants of restricted stock, exercises of stock options, and purchases under the Employee Stock Purchase Plan (ESPP)., and share cancellations. At our May 2020 annual general meeting, our shareholders approved the cancellation of 2,178,600 shares purchased under our share repurchase program during the period beginning September 23, 2019 and ending December 31, 2019. The capital reduction by cancellation of shares was subject to publication requirements and a two-month waiting period in accordance with Swiss law and became effective August 3, 2020.

Authorized share capital for general purposes under Swiss law
TheIn accordance with Swiss law, the Board has shareholder-approved authority as set forth in the Articles of Association to increase for general purposes Chubb's share capital from time to time until May 17, 2020,20, 2022, by the issuance for general purposes of up to 200,000,000 fully paid up Common Shares, with a par value equal to the par value of Chubb's Common Shares as set forth in the Articles of Association at the time of any such issuance. Any such increases would be subject to Swiss rules and procedure.

Conditional share capital for bonds and similar debt instruments
Chubb's share capital may be increased through the issuance of a maximum of 33,000,000 fully paid up Common Shares (with a par value of CHF 24.15 as of December 31, 2019)2020) through the exercise of conversion and/or option or warrant rights granted in connection with bonds, notes, or similar instruments, issued or to be issued by Chubb, including convertible debt instruments.

Conditional share capital for employee benefit plans
Chubb's share capital may be increased through the issuance of a maximum of 25,410,929 fully paid up Common Shares (with a par value of CHF 24.15 as of December 31, 2019)2020) in connection with the exercise of option rights granted to any employee of Chubb, director or other person providing services to Chubb.


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

c) Chubb Limited securities repurchases
From time to time, we repurchase shares as part of our capital management program and to partially offset potential dilution from the exercise of stock options and the granting of restricted stock under share-based compensation plans. The Board of Directors has authorized share repurchase programs as follows:

$1.0 billion of Chubb Common Shares from January 1, 2018 through December 31, 2018
$1.5 billion of Chubb Common Shares from December 1, 2018 through December 31, 2019
$1.5 billion of Chubb Common Shares from November 21, 2019 through December 31, 2020
$1.5 billion of Chubb Common Shares from November 19, 2020 through December 31, 2021

Subsequently, in February 2021, the Board approved an increase to the November 2020 share repurchase program of $1.0 billion to a total of $2.5 billion, effective through December 31, 2021.

of Chubb Common Shares from November 17, 2016 through December 31, 2017
$1.0 billion of Chubb Common Shares from January 1, 2018 through December 31, 2018
$1.5 billion of Chubb Common Shares from December 1, 2018 through December 31, 2019
$1.5 billion of Chubb Common Shares from November 21, 2019 through December 31, 2020

Share repurchases may be in the open market, in privately negotiated transactions, block trades, accelerated repurchases and/orand through option or other forward transactions.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents repurchases of Chubb's Common Shares conducted in a series of open market transactions under the Board authorizations:
Year Ended December 31January 1, 2021 through
(in millions of U.S. dollars, except share data)202020192018February 24, 2021
Number of shares repurchased3,584,150 10,442,238 7,719,035 1,971,000 
Cost of shares repurchased (1)
$516 $1,531 $1,021 $327 
 Year Ended December 31  January 1, 2020 through
(in millions of U.S. dollars, except share data)2019
 2018
 2017
 February 26, 2020
Number of shares repurchased10,442,238
 7,719,035
 5,866,612
 947,400
Cost of shares repurchased$1,531
 $1,021
 $830
 $151
(1)On April 22, 2020, we suspended share repurchases, given the economic environment and to preserve capital for both risk and opportunity. Subsequently, we announced and then resumed share repurchases on October 29, 2020.


d) General restrictions
The holders of the Common Shares are entitled to receive dividends as approved by the shareholders. Holders of Common Shares are allowed one vote per share provided that, if the controlled shares of any shareholder constitute 10ten percent or more of the outstanding Common Shares of Chubb, only a fraction of the vote will be allowed so as not to exceed 10ten percent in aggregate. Entry of acquirers of Common Shares as shareholders with voting rights in the share register may be refused if it would confer voting rights with respect to 10ten percent or more of the registered share capital recorded in the commercial register.

12
.
12. Share-based compensation

Chubb has share-based compensation plans which currently provide the Board the ability to grant awards of stock options, restricted stock, and restricted stock units to its employees and members of the Board.

In May 2016, our shareholders approved the Chubb Limited 2016 Long-Term Incentive Plan (the 2016 LTIP), which replaced both the ACE Limited 2004 LTIP (the 2004 LTIP) and The Chubb Corporation Long-Term Incentive Plan (2014). The 2016 LTIP is substantially similar to the 2004 LTIP in its operation and the types of awards that may be granted. Under the 2016 LTIP, Common Shares of Chubb were authorized to be issued pursuant to awards made as stock options, stock appreciation rights, performance shares, performance units, restricted stock, and restricted stock units.

Chubb principally issues restricted stock grants and stock options on a graded vesting schedule, with equal percentages of the award subject to vesting over a number of years (typically three or four). Chubb recognizes compensation cost for vesting of restricted stock and stock option grants with only service conditions on a straight-line basis over the requisite service period for each separately vesting portion of the award as if the award were, in-substance, multiple awards. We incorporate an estimate of future forfeitures in determining compensation cost for both grants of restricted stock and stock options.

In addition, Chubb grants performance-based restricted stock to certain executives that vest based on certain performance criteria as compared to a defined group of peer companies. Performance-based stock awards comprise target awards and premium awards that cliff vest at the end of a 3-year performance period based on both our tangible book value (shareholders' equity less goodwill and intangible assets, net of tax) per share growth and P&C combined ratio compared to our peer group. Premium awards are subject to an additional vesting provision based on total shareholder return (TSR) compared to our peer

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

group. Shares representing target awards and premium awards are issued when the awards are approved and are subject to forfeiture if applicable performance criteria are not met at the end of the 3-year performance period. Prior to January 2017, performance-based restricted stock awards had a 4-year vesting period with the potential to vest as to a portion each year, and excluded the P&C combined ratio and TSR additional vesting criteria.

Under the 2016 LTIP,19,500,000Common Shares are authorized to be issued. This is in addition to any shares that have not been delivered pursuant to the 2004 LTIP and remain available for grant pursuant to the 2004 LTIP and includes any shares covered by awards granted under the 2004 LTIP that have forfeited, expired or canceled after the effective date of the 2016 LTIP. At December 31, 2019,2020, a total of 10,789,2857,576,239 shares remain available for future issuance under the 2016 LTIP, which includes shares canceled or forfeited from the 2004 LTIP, in addition to common shares that were previously registered and authorized to be issued.

Under the Employee Stock Purchase Plan (ESPP), 6,500,000 shares are authorized to be issued.  At December 31, 2019,2020, a total of 1,785,9781,402,017 shares remain available for issuance under the ESPP.

Chubb generally issues Common Shares for the exercise of stock options, restricted stock, and purchases under the ESPP from un-issued reserved shares (conditional share capital) and Common Shares in treasury.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents pre-tax and after-tax share-based compensation expense:
Year Ended December 31
(in millions of U.S. dollars)202020192018
Stock options and shares issued under ESPP:
Pre-tax$45 $42 $50 
After-tax (1)
$38 $39 $40 
Restricted stock:
Pre-tax$210 $224 $235 
After-tax (1)
$164 $180 $178 
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Stock options and shares issued under ESPP:     
Pre-tax$42
 $50
 $41
After-tax (1)
$39
 $40
 $26
Restricted stock:     
Pre-tax$224
 $235
 $259
After-tax$180
 $178
 $151
(1)The windfall tax benefit recorded to Income tax expense in the Consolidated statement of operations was $10 million, $12 million, and $19 million for the years ended December 31, 2020, 2019, and 2018, respectively.

(1)
The windfall tax benefit recorded to Income tax expense in the Consolidated statement of operations was $12 million, $19 million, and $48 million for the years ended December 31, 2019, 2018, and 2017, respectively.

Unrecognized compensation expense related to the unvested portion of Chubb's employee share-based awards of restricted stock, restricted stock units, and stock options was $205$199 million at December 31, 20192020 and is expected to be recognized over a weighted-average period of approximately 1 year.

Stock options
Both incentive and non-qualified stock options are principally granted at an option price per share equal to the grant date fair value of Chubb's Common Shares. Stock options are generally granted with a 3-year vesting period and a 10-year term. Stock options vest in equal annual installments over the respective vesting period, which is also the requisite service period.

Chubb's 20192020 share-based compensation expense includes a portion of the cost related to the 20162017 through 20192020 stock option grants. Stock option fair value was estimated on the grant date using the Black-Scholes option-pricing model that uses the weighted-average assumptions noted below:
Year Ended December 31
202020192018
Dividend yield2.1 %2.2 %2.0 %
Expected volatility18.0 %16.0 %23.2 %
Risk-free interest rate1.2 %2.6 %2.7 %
Expected life5.7 years5.7 years5.7 years
 Year Ended December 31 
 2019
 2018
 2017
Dividend yield2.2% 2.0% 2.0%
Expected volatility16.0% 23.2% 19.7%
Risk-free interest rate2.6% 2.7% 2.0%
Expected life5.7 years
 5.7 years
 5.8 years


The risk-free interest rate is based on the U.S. Treasury yield curve in effect at the time of grant. The expected life (estimated period of time from grant to exercise date) is estimated using the historical exercise behavior of employees. For yearyears 2020 and 2019, expected volatility is calculated as a blend of (a) historical volatility based on daily closing prices over a period equal to

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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

the expected life assumption and (b) implied volatility derived from Chubb's publicly traded options. For yearsyear 2018, and 2017, expected volatility was calculated as a blend of (a) historical volatility based on daily closing prices over a period equal to the expected life assumption, (b) long-term historical volatility based on daily closing prices over the period from Chubb's initial public trading date through the most recent quarter, and (c) implied volatility derived from Chubb's publicly traded options.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following table presents a roll-forward of Chubb's stock options:
(Intrinsic Value in millions of U.S. dollars)Number of OptionsWeighted-Average Exercise PriceWeighted-Average Fair ValueTotal Intrinsic Value
Options outstanding, December 31, 201710,433,316 $99.20 
Granted1,842,690 $143.07 $29.71 
Exercised(1,065,384)$73.57 $71 
Forfeited and expired(202,900)$133.92 
Options outstanding, December 31, 201811,007,722 $108.25 
Granted2,073,940 $133.90 $18.76 
Exercised(1,944,604)$84.13 $122 
Forfeited and expired(251,801)$136.87 
Options outstanding, December 31, 201910,885,257 $116.79 
Granted1,958,279 $150.10 $19.89 
Exercised(1,158,633)$86.90 $76 
Forfeited and expired(206,720)$138.77 
Options outstanding, December 31, 202011,478,183 $125.09 $331 
Options exercisable, December 31, 20207,792,343 $116.35 $293 
(Intrinsic Value in millions of U.S. dollars)Number of Options
 Weighted-Average Exercise Price
 Weighted-Average Fair Value
 Total Intrinsic Value
Options outstanding, December 31, 201610,180,720
 $87.29
    
Granted2,079,522
 $139.00
 $22.97
  
Exercised(1,632,629) $73.53
   $111
Forfeited(194,297) $119.44
    
Options outstanding, December 31, 201710,433,316
 $99.20
    
Granted1,842,690
 $143.07
 $29.71
  
Exercised(1,065,384) $73.57
   $71
Forfeited(202,900) $133.92
    
Options outstanding, December 31, 201811,007,722
 $108.25
    
Granted2,073,940
 $133.90
 $18.76
  
Exercised(1,944,604) $84.13
   $122
Forfeited(251,801) $136.87
    
Options outstanding, December 31, 201910,885,257
 $116.79
   $423
Options exercisable, December 31, 20197,213,685
 $106.26
   $356


The weighted-average remaining contractual term was 6.16.0 years for stock options outstanding and 4.8 years for stock options exercisable at December 31, 2019.2020. Cash received from the exercise of stock options for the year ended December 31, 20192020 was $163$100 million.

Restricted stock and restricted stock units
Grants of restricted stock and restricted stock units awarded under both the 2004 LTIP and 2016 LTIP typically have a 4-year vesting period, subject to vesting as to one-quarter of the award each anniversary of grant. Restricted stock and restricted stock units are granted at market close price on the day of grant. Each restricted stock unit represents our obligation to deliver to the holder one Common Share upon vesting.

Chubb also grants restricted stock awards to non-management directors which vest at the following year's annual general meeting.

Chubb's 20192020 share-based compensation expense includes a portion of the cost related to the restricted stock granted in the years 20152016 through 2019.2020.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The following table presents a roll-forward of our restricted stock awards. Included in the roll-forward below are 27,679 restricted stock awards, 19,019 restricted stock awards, 20,784 restricted stock awards, and 22,01320,784 restricted stock awards that were granted to non-management directors during the years ended December 31, 2020, 2019, 2018, and 2017,2018, respectively:
Service-based
Restricted Stock Awards
and Restricted Stock Units
Performance-based
Restricted Stock Awards
and Restricted Stock Units
Number of SharesWeighted-Average
Grant-Date Fair Value
Number of SharesWeighted-Average
Grant-Date Fair Value
Unvested restricted stock, December 31, 20174,709,442 $121.16 975,497 $118.28 
Granted1,326,979 $142.76 180,065 $143.07 
Vested(2,545,090)$114.83 (244,332)$103.03 
Forfeited(196,482)$131.06 $
Unvested restricted stock, December 31, 20183,294,849 $134.17 911,230 $127.27 
Granted1,492,900 $134.38 212,059 $133.90 
Vested(1,292,864)$129.18 (196,640)$115.62 
Forfeited(200,875)$135.98 (50,437)$132.36 
Unvested restricted stock, December 31, 20193,294,010 $136.20 876,212 $131.16 
Granted1,425,667 $148.56 186,291 $151.14 
Vested(1,304,308)$134.02 (490,185)$125.66 
Forfeited(152,074)$140.72 $
Unvested restricted stock, December 31, 20203,263,295 $142.32 572,318 $142.38 
 
Service-based
Restricted Stock Awards and Restricted Stock Units
  
Performance-based
Restricted Stock Awards
and Restricted Stock Units
 
 Number of Shares
 Weighted-Average Grant-Date Fair Value
 Number of Shares
 Weighted-Average Grant-Date Fair Value
Unvested restricted stock, December 31, 20165,805,126
 $109.39
 931,169
 $111.17
Granted1,707,094
 $139.18
 267,282
 $138.90
Vested(2,646,084) $107.73
 (222,954) $113.30
Forfeited(156,694) $114.54
 
 $
Unvested restricted stock, December 31, 20174,709,442
 $121.16
 975,497
 $118.28
Granted1,326,979
 $142.76
 180,065
 $143.07
Vested(2,545,090) $114.83
 (244,332) $103.03
Forfeited(196,482) $131.06
 
 $
Unvested restricted stock, December 31, 20183,294,849
 $134.17
 911,230
 $127.27
Granted1,492,900
 $134.38
 212,059
 $133.90
Vested(1,292,864) $129.18
 (196,640) $115.62
Forfeited(200,875) $135.98
 (50,437) $132.36
Unvested restricted stock, December 31, 20193,294,010
 $136.20
 876,212
 $131.16


Prior to 2009, legacy ACE granted restricted stock units with a 1-year vesting period to non-management directors. Delivery of Common Shares on account of these restricted stock units to non-management directors is deferred until after the date of the non-management directors' termination from the Board. Legacy Chubb Corp historically allowed directors and certain key employees of Chubb Corp and its subsidiaries to defer a portion of their compensation earned with respect to services performed in the form of deferred stock units. In addition, legacy Chubb Corp provided supplemental retirement benefits for certain employees through its Defined Contribution Excess Benefit Plan in the form of deferred shares of stock. The minimum vesting period under these legacy Chubb Corp deferred plans was 1-year and the maximum was 3-years. Employees and directors had the option to elect to receive their awards at a future specified date or upon their termination of service with Chubb. At December 31, 2019,2020, there were 201,666166,624 deferred restricted stock units.

ESPP
The ESPP gives participating employees the right to purchase Common Shares through payroll deductions during consecutive subscription periods at a purchase price of 85 percent of the fair value of a Common Share on the exercise date (Purchase Price). Annual purchases by participants are limited to the number of whole shares that can be purchased by an amount equal to 10 percent of the participant's compensation or $25,000, whichever is less. The ESPP has two six-month subscription periods each year, the first of which runs between January 1 and June 30 and the second of which runs between July 1 and December 31. The amounts collected from participants during a subscription period are used on the exercise date to purchase full shares of Common Shares. An exercise date is generally the last trading day of a subscription period. The number of shares purchased is equal to the total amount, at the exercise date, collected from the participants through payroll deductions for that subscription period, divided by the Purchase Price, rounded down to the next full share. Participants may withdraw from an offering before the exercise date and obtain a refund of amounts withheld through payroll deductions. Pursuant to the provisions of the ESPP, during the years ended December 31, 2020, 2019, 2018, and 2017,2018, employees paid $45 million, $41 million, $37 million, and $34$37 million to purchase 383,751 shares, 321,800 shares, 347,116 shares, and 271,185347,116 shares, respectively.



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Chubb Limited and Subsidiaries



13. Postretirement benefits
13
. Postretirement benefits

Chubb provides postretirement benefits to eligible employees and their dependents through various defined contribution plans sponsored by Chubb. In addition, for certain employees, Chubb sponsors other postretirement benefit plans, and prior to 2020, Chubb sponsored defined benefit pension plans.
Defined contribution plans (including 401(k))
Under these plans, employees' contributions may be supplemented by Chubb matching contributions based on the level of employee contribution. These contributions are invested at the election of each employee in one or more of several investment portfolios offered by a third-party investment advisor. Expenses for these plans totaled $171$211 million, $171 million, and $166$171 million for the years ended December 31, 2020, 2019, 2018, and 2017,2018, respectively.

Defined benefit pension plans
We maintain non-contributory defined benefit pension plans that cover certain employees located in the U.S., U.K., Canada, and various other statutorily required countries. We account for pension benefits using the accrual method. Benefits under these plans are based on employees' years of service and compensation during final years of service. All underlying plans are subject to periodic actuarial valuations by qualified actuarial firms using actuarial models to calculate the expense and liability for each plan. We use December 31 as the measurement date for our defined benefit pension plans.

Under the Chubb Corp plans, prior to 2001, benefits were generally based on an employee’s years of service and average compensation during the last five years of employment. Effective January 1, 2001, the formula for providing pension benefits was changed from the final average pay formula to a cash balance formula. Under the cash balance formula, a notional account is established for each employee, which is credited semi-annually with an amount equal to a percentage of eligible compensation based on age and years of service plus interest based on the account balance. Chubb Corp employees hired prior to 2001 will generally be eligible to receive vested benefits based on the higher of the final average pay or cash balance formulas.

Other postretirement benefit plans
Our assumption of Chubb Corp's other postretirement benefit plans, principally healthcare and life insurance, covers retired employees, their beneficiaries, and covered dependents. Healthcare coverage is contributory. Retiree contributions vary based upon the retiree’s age, type of coverage, and years of service requirements. Life insurance coverage is non-contributory. Chubb funds a portion of the healthcare benefits obligation where such funding can be accomplished on a tax-effective basis. Benefits are paid as covered expenses are incurred.

Amendments to U.S. qualified and excess pension plans and U.S. retiree healthcare plan
On October 31, 2016, we harmonized and amended several of our U.S. retirement programs to create a unified retirement savings program. In 2020, we transitioned from a traditional defined benefit pension program that had been in effect for certain employees to a defined contribution program. Additionally, after 2025, we plan to eliminate a subsidized U.S. retiree healthcare and life insurance plan that had been in place for certain employees. Both amendments required a remeasurement of the plan assets and benefit obligations with updated assumptions, including discount rates and the expected return on assets. The amendment of the retiree healthcare plan resulted in a reduction in the obligation of $383 million, of which $410 million will be amortized as a reduction to expense through 2021 as it relates to benefits already accrued. For the years ended December 31, 2020, 2019, 2018, and 2017,2018, $79 million, $80$79 million, and $89$80 million, respectively, were amortized as a reduction to expense. At December 31, 2019,2020, the remaining curtailment benefit balance was $105$26 million which will be amortized as a reduction to expense over the next 1.5 years.through June 2021.



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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Obligations and funded status
The funded status of the pension and other postretirement benefit plans as well as the amounts recognized in Accumulated other comprehensive income at December 31, 20192020 and 20182019 was as follows:
Pension Benefit PlansOther Postretirement
Benefit Plans
2020201920202019
U.S. PlansNon-U.S. PlansU.S. PlansNon-U.S. Plans
(in millions of U.S. dollars)
Benefit obligation, beginning of year$3,569 $1,042 $3,092 $942 $103 $113 
   Service cost0 4 49 11 1 
   Interest cost99 22 118 27 2 
   Actuarial loss (gain)441 135 443 124 1 
   Benefits paid(127)(31)(121)(39)(20)(17)
   Curtailments0 (2)(4)0 
   Settlements(15)0 (12)(61)0 
   Foreign currency revaluation and other0 29 42 (1)
Benefit obligation, end of year$3,967 $1,199 $3,569 $1,042 $86 $103 
Plan assets at fair value, beginning of year$3,301 $1,141 $2,784 $1,008 $152 $143 
   Actual return on plan assets563 126 636 169 6 
   Employer contributions17 19 14 16 1 
   Benefits paid(127)(31)(121)(39)(39)
   Settlements(15)0 (12)(61)0 
   Foreign currency revaluation and other0 29 48 0 
Plan assets at fair value, end of year$3,739 $1,284 $3,301 $1,141 $120 $152 
Funded status at end of year$(228)$85 $(268)$99 $34 $49 
Amounts recognized in Accumulated other comprehensive
income, not yet recognized in net periodic cost (benefit):
Net actuarial loss (gain)$78 $163 $(21)$110 $(5)$(3)
Prior service cost (benefit)0 9 10 (31)(114)
Total$78 $172 $(21)$120 $(36)$(117)
 Pension Benefit Plans  Other Postretirement Benefit Plans 
 2019  2018  2019
 2018
 U.S. Plans
 Non-U.S. Plans
 U.S. Plans
 Non-U.S. Plans
    
(in millions of U.S. dollars)    
Benefit obligation, beginning of year$3,092
 $942
 $3,285
 $1,077
 $113
 $137
   Service cost49
 11
 57
 12
 
 1
   Interest cost118
 27
 105
 27
 4
 3
   Actuarial loss (gain)443
 124
 (214) (71) 3
 (20)
   Benefits paid(121) (39) (108) (26) (17) (15)
   Amendments
 
 
 4
 
 
   Curtailments
 (4) 
 
 
 
   Settlements(12) (61) (33) (27) 
 
   Foreign currency revaluation and other
 42
 
 (54) 
 7
Benefit obligation, end of year$3,569
 $1,042
 $3,092
 $942
 $103
 $113
Plan assets at fair value, beginning of year$2,784
 $1,008
 $3,109
 $1,172
 $143
 $157
   Actual return on plan assets636
 169
 (218) (63) 9
 1
   Employer contributions14
 16
 34
 14
 
 
   Benefits paid(121) (39) (108) (26) 
 (15)
   Settlements(12) (61) (33) (27) 
 
   Foreign currency revaluation and other
 48
 
 (62) 
 
Plan assets at fair value, end of year$3,301
 $1,141
 $2,784
 $1,008
 $152
 $143
Funded status at end of year$(268) $99
 $(308) $66
 $49
 $30
Amounts recognized in Accumulated other comprehensive
income, not yet recognized in net periodic cost (benefit):

        
Net actuarial loss (gain)$(21) $110
 $(15) $112
 $(3) $
Prior service cost (benefit)
 10
 
 9
 (114) (200)
Total$(21) $120
 $(15) $121
 $(117) $(200)


For the U.S. pension plans, the $441 million and $443 million actuarial loss experienced in 2020 and 2019, respectively, was principally driven by the decrease in the discount rate from 2018 that was used to determine the projected benefit obligation at December 31, 2019. The $214 million actuarial gain experienced in 2018 was largely driven by the increase in the discount rate from 2017 that was used to determine the projected benefit obligation at December 31, 2018.respective prior year.
The accumulated benefit obligation for the pension benefit plans was $4.6$5.1 billion and $4.0$4.6 billion at December 31, 20192020 and 2018,2019, respectively. The accumulated benefit obligation is the present value of pension benefits earned as of the measurement date based on employee service and compensation prior to that date. It differs from the pension (projected) benefit obligation in the table above in that the accumulated benefit obligation includes no assumptions regarding future compensation levels.

The net components of the funded status of the pension and other postretirement benefit plans are included in Accounts payable, accrued expenses, and other liabilities in the Consolidated balance sheets.

Chubb’s funding policy is to contribute amounts that meet regulatory requirements plus additional amounts determined based on actuarial valuations, market conditions and other factors. All benefit plans satisfy minimum funding requirements of the Employee Retirement Income Security Act of 1974 (ERISA). 



F-87F-83


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The following table provides information on pension plans where the benefit obligation is in excess of plan assets at December 31, 20192020 and 2018:2019:
20202019
U.S. PlansNon-U.S. PlansU.S. PlansNon-U.S. Plans
(in millions of U.S. dollars)
Plans with projected benefit obligation in excess of plan assets:
Projected benefit obligation$3,967 $629 $3,569 $236 
Fair value of plan assets3,739 568 3,301 175 
Net funded status$(228)$(61)$(268)$(61)
Plans with accumulated benefit obligation in excess of plan assets:
Accumulated benefit obligation$3,967 $593 $3,569 $173 
Fair value of plan assets$3,739 $565 $3,301 $140 
 2019  2018 
 U.S. Plans
 Non-U.S. Plans
 U.S. Plans
 Non-U.S. Plans
(in millions of U.S. dollars)  
Plans with projected benefit obligation in excess of plan assets:       
Projected benefit obligation$3,569
 $236
 $3,092
 $222
Fair value of plan assets3,301
 175
 2,784
 170
Net funded status$(268) $(61) $(308) $(52)
Plans with accumulated benefit obligation in excess of plan assets:       
Accumulated benefit obligation$3,569
 $173
 $3,066
 $115
Fair value of plan assets$3,301
 $140
 $2,784
 $86


For other postretirement benefit plans with an accumulated benefit obligation in excess of plan assets, the accumulated benefit obligation was $25$23 million and $23$25 million at December 31, 20192020 and 2018,2019, respectively. These plans have no plan assets.

At December 31, 2019,2020, we estimate that we will contribute $23$20 million to the pension plans and $1 million to the other postretirement benefits plan in 2020.2021. The estimate is subject to change due to contribution decisions that are affected by various factors including our liquidity, market performance and management discretion.

At December 31, 2020, our estimated expected future benefit payments are as follows:
Pension Benefit PlansOther Postretirement Benefit Plans
For the years ending December 31U.S.
Plans
Non-U.S. Plans
(in millions of U.S. dollars)
2021$159 $30 $19 
2022166 28 20 
2023171 30 16 
2024175 32 12 
2025180 32 
2026-2030947 185 

The weighted-average assumptions used to determine the projected benefit obligation were as follows:
 Pension Benefit Plans   
 U.S. Plans
 Non-U.S. Plans
 Other Postretirement Benefit Plans
   
December 31, 2019     
Discount rate3.20% 2.39% 2.70%
Rate of compensation increase (1)
N/A
 3.26% N/A
Interest crediting rate4.10%    
December 31, 2018     
Discount rate4.20% 3.10% 3.78%
Rate of compensation increase4.00% 3.37% N/A
Interest crediting rate4.10%    

Pension Benefit Plans
U.S.
Plans
Non-U.S.
Plans
Other Postretirement Benefit Plans
December 31, 2020
Discount rate2.32 %1.80 %1.36 %
Rate of compensation increase (1)
N/A3.24 %N/A
Interest crediting rate4.10 %
December 31, 2019
Discount rate3.20 %2.39 %2.70 %
Rate of compensation increase (1)
N/A3.26 %N/A
Interest crediting rate4.10 %
(1) For the U.S. Pension Plans, benefit accruals were frozen as of December 31, 2019.


F-84


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

The projected benefit cash flows were discounted using the corresponding spot rates derived from a yield curve, which resulted in a single discount rate that would produce the same liability at the respective measurement dates. The same process was applied to service cost cash flows to determine the discount rate associated with the service cost. In general, the discount rates for the non-U.S. plans were developed using a similar methodology by using country-specific yield curves.



F-88


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The components of net pension and other postretirement benefit costs reflected in Net income and other changes in plan assets and benefit obligations recognized in other comprehensive income were as follows:
Pension Benefit PlansOther Postretirement
Benefit Plans
U.S. PlansNon-U.S. Plans
Year Ended December 31202020192018202020192018202020192018
(in millions of U.S. dollars)
Costs reflected in Net income:
Service cost$0 $49 $57 $4 $11 $12 $1 $$
Non-service cost:
Interest cost99 118 105 22 27 27 2 
Expected return on plan assets(224)(189)(212)(41)(45)(50)(5)(4)(5)
Amortization of net actuarial loss0 2 0 
Amortization of prior service cost0 0 (83)(84)(85)
Curtailments0 (1)(1)0 (2)
Settlements3 0 0 
Total non-service benefit(122)(69)(105)(18)(15)(19)(86)(84)(89)
Net periodic benefit$(122)$(20)$(48)$(14)$(4)$(7)$(85)$(84)$(88)
Changes in plan assets and benefit obligations recognized in other comprehensive income
Net actuarial loss (gain)$102 $(4)$214 $56 $$34 $(2)$(2)$(11)
Prior service cost (benefit)0 0 0 
Amortization of net actuarial loss0 (2)(3)(1)0 (1)
Amortization of prior service cost0 (1)83 84 85 
Curtailments0 (1)(3)0 
Settlements(3)(2)(2)0 (1)(3)0 
Total decrease (increase) in other comprehensive income$99 $(6)$212 $52 $$33 $81 $82 $76 
 Pension Benefit Plans  Other Postretirement Benefit Plans 
 U.S. Plans  Non-U.S. Plans  
Year Ended December 312019
 2018
 2017
 2019
 2018
 2017
 2019
 2018
 2017
(in millions of U.S. dollars)       
Costs reflected in Net income:                 
Service cost$49
 $57
 $63
 $11
 $12
 $17
 $
 $1
 $2
Non-service cost:                 
Interest cost118
 105
 105
 27
 27
 27
 4
 3
 4
Expected return on plan assets(189) (212) (189) (45) (50) (42) (4) (5) (5)
Amortization of net actuarial loss
 
 
 3
 1
 3
 
 
 
Amortization of prior service cost
 
 
 
 
 
 (84) (85) (89)
Curtailments
 
 
 (1) 
 (27) 
 (2) (37)
Settlements2
 2
 
 1
 3
 
 
 
 
Total non-service benefit(69) (105) (84) (15) (19) (39) (84) (89) (127)
Net periodic benefit$(20) $(48) $(21) $(4) $(7) $(22) $(84) $(88) $(125)
Changes in plan assets and benefit obligations recognized in other comprehensive income                 
Net actuarial loss (gain)$(4) $214
 $(21) $6
 $34
 $(57) $(2) $(11) $(3)
Prior service cost (benefit)
 
 
 1
 3
 
 
 
 (23)
Amortization of net actuarial loss
 
 
 (3) (1) (3) 
 (1) 
Amortization of prior service cost
 
 
 
 
 
 84
 85
 89
Curtailments
 
 
 (3) 
 (6) 
 3
 39
Settlements(2) (2) 1
 (1) (3) 
 
 
 
Total decrease (increase) in other comprehensive income$(6) $212
 $(20) $
 $33
 $(66) $82
 $76
 $102


The line items in which the service and non-service cost components of net periodic (benefit) cost reflectedare included in the Consolidated statements of operations were as follows:
  Pension Benefit Plans  Other Postretirement Benefit Plans 
Year Ended December 31 2019 2018 2017 2019 2018 2017
(in millions of U.S. dollars)      
Service Cost:            
Losses and loss expenses $6
 $7
 $7
 $
 $
 $
Administrative expenses 54
 62
 73
 
 1
 2
Total service cost 60
 69
 80
 
 1
 2
Non-Service Cost:            
Losses and loss expenses (7) (10) (8) (8) (9) (13)
Administrative expenses (77) (114) (115) (76) (80) (114)
Total non-service benefit (84) (124) (123) (84) (89) (127)
Net periodic benefit $(24) $(55) $(43) $(84) $(88) $(125)


Pension Benefit PlansOther Postretirement Benefit Plans
Year Ended December 31202020192018202020192018
(in millions of U.S. dollars)
Service cost:
Losses and loss expenses$0 $$$0 $$
Administrative expenses4 54 62 1 
Total service cost4 60 69 1 
Non-service cost:
Losses and loss expenses(12)(7)(10)(9)(8)(9)
Administrative expenses(128)(77)(114)(77)(76)(80)
Total non-service benefit(140)(84)(124)(86)(84)(89)
Net periodic benefit$(136)$(24)$(55)$(85)$(84)$(88)

F-89F-85


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The weighted-average assumptions used to determine the net periodic pension and other postretirement benefit costs were as follows:
Pension Benefit Plans
U.S. PlansNon-U.S. PlansOther Postretirement Benefit Plans
Year Ended December 31
2020
Discount rate in effect for determining service costN/A6.04 %3.00 %
Discount rate in effect for determining interest cost2.85 %2.24 %2.64 %
Rate of compensation increaseN/A3.26 %N/A
Expected long-term rate of return on plan assets7.00 %3.83 %3.00 %
Interest crediting rate4.10 %N/AN/A
2019
Discount rate in effect for determining service cost4.23 %4.48 %4.04 %
Discount rate in effect for determining interest cost3.94 %2.88 %3.69 %
Rate of compensation increase4.00 %3.37 %N/A
Expected long-term rate of return on plan assets7.00 %4.40 %3.00 %
Interest crediting rate4.10 %N/AN/A
2018
Discount rate in effect for determining service cost3.62 %3.97 %2.84 %
Discount rate in effect for determining interest cost3.27 %2.55 %2.62 %
Rate of compensation increase4.00 %3.46 %N/A
Expected long-term rate of return on plan assets7.00 %4.32 %2.59 %
Interest crediting rate4.10 %N/AN/A
 Pension Benefit Plans   
 U.S. Plans
 Non-U.S. Plans
 
Other Postretirement Benefit Plans


Year Ended December 31  
2019     
Discount rate in effect for determining service cost4.23% 4.48% 4.04%
Discount rate in effect for determining interest cost3.94% 2.88% 3.69%
Rate of compensation increase4.00% 3.37% N/A
Expected long-term rate of return on plan assets7.00% 4.40% 3.00%
Interest crediting rate4.10% N/A
 N/A
2018     
Discount rate in effect for determining service cost3.62% 3.97% 2.84%
Discount rate in effect for determining interest cost3.27% 2.55% 2.62%
Rate of compensation increase4.00% 3.46% N/A
Expected long-term rate of return on plan assets7.00% 4.32% 2.59%
Interest crediting rate4.10% N/A
 N/A
2017     
Discount rate in effect for determining service cost4.20% 3.55% 2.84%
Discount rate in effect for determining interest cost3.53% 2.61% 2.44%
Rate of compensation increase4.00% 3.57% N/A
Expected long-term rate of return on plan assets7.00% 4.23% 3.00%
Interest crediting rate4.10% N/A
 N/A

F-86

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries


The weighted-average healthcare cost trend rate assumptions used to measure the expected cost of healthcare benefits were as follows:
U.S. PlansNon-U.S. Plans
202020192018202020192018
Healthcare cost trend rate5.96 %6.32 %6.68 %5.04 %5.24 %6.29 %
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)4.50 %4.50 %4.50 %4.00 %4.00 %4.50 %
Year that the rate reaches the ultimate trend rate203820382038204020402029
 U.S. Plans  Non-U.S. Plans 
 2019
 2018
 2017
 2019
 2018
 2017
Healthcare cost trend rate6.32% 6.68% 7.01% 5.24% 6.29% 6.61%
Rate to which the cost trend rate is assumed to decline (the ultimate trend rate)4.50% 4.50% 4.50% 4.00% 4.50% 4.50%
Year that the rate reaches the ultimate trend rate2038
 2038
 2038
 2040
 2029
 2029


Plan Assets
The long term objective of the pension plan is to provide sufficient funding to cover expected benefit obligations, while assuming a prudent level of portfolio risk. The assets of the pension plan are invested, either directly or through pooled funds, in a diversified portfolio of predominately equity securities and fixed maturities. We seek to obtain a rate of return that over time equals or exceeds the returns of the broad markets in which the plan assets are invested. The target allocation of U.S. plan assets is 55 percent to 65 percent invested in equity securities (including certain other investments measured using NAV), with the remainder primarily invested in fixed maturities. The target allocation of non-U.S. plans varies by country, but the plan assets are principally invested in fixed maturities. We rebalance our pension assets to the target allocation as market conditions permit. We determined the expected long term rate of return assumption for each asset class based on an analysis of the historical returns and the expectations for future returns. The expected long term rate of return for the portfolio is a weighted aggregation of the expected returns for each asset class.

In order to minimize risk, the Plan maintains a listing of permissible and prohibited investments. In addition, the Plan has certain concentration limits and investment quality requirements imposed on permissible investments options. Investment risk is measured and monitored on an ongoing basis.


F-90


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The following tables present the fair values of the pension plan assets, by valuation hierarchy. For additional information on how we classify these assets within the valuation hierarchy, refer to Note 4 to the Consolidated financial statements.Financial Statements.
December 31, 2020Pension Benefit Plans
(in millions of U.S. dollars)Level 1Level 2Level 3Total
U.S. Plans:
Short-term investments$59 $0 $0 $59 
U.S. Treasury / Agency250 186 0 436 
Non-U.S. and corporate bonds0 793 0 793 
Municipal0 2 0 2 
Equity securities1,818 0 0 1,818 
Total U.S. Plan assets (1)
$2,127 $981 $0 $3,108 
Non-U.S. Plans:
Short-term investments$5 $0 $0 $5 
Non-U.S. and corporate bonds0 609 0 609 
Equity securities127 388 0 515 
Total Non-U.S. Plan assets (1)
$132 $997 $0 $1,129 
December 31, 2019Pension Benefit Plans 
(in millions of U.S. dollars)Level 1
 Level 2
 Level 3
 Total
U.S. Plans:       
Short-term investments$18
 $37
 $
 $55
U.S. Treasury and agency466
 134
 
 600
Foreign and corporate bonds
 749
 
 749
States, municipalities, and political subdivisions


 2
 
 2
Equity securities1,467
 
 
 1,467
Total U.S. Plan assets (1)
$1,951
 $922
 $
 $2,873
Non-U.S. Plans:       
Short-term investments$2
 $
 $
 $2
Foreign and corporate bonds
 598
 
 598
Equity securities112
 318
 
 430
Total Non-U.S. Plan assets (1)
$114
 $916
 $
 $1,030
(1)
Excluded from the table above are $428(1)Excluded from the table above are $543 million and $147 million and $107 million of other investments measured using NAV as a practical expedient related to the U.S. Plans and Non-U.S. Plans, respectively, limited partnerships of $74 million and $8 million in U.S. Plans and Non-U.S. Plans, respectively, and limited partnerships of $4 million in Non-U.S. Plans.
December 31, 2018Pension Benefit Plans 
(in millions of U.S. dollars)Level 1
 Level 2
 Level 3
 Total
U.S. Plans:       
Short-term investments$10
 $74
 $
 $84
U.S. Treasury and agency433
 82
 
 515
Foreign and corporate bonds
 641
 
 641
Equity securities1,050
 
 
 1,050
Total U.S. Plan assets (1)
$1,493
 $797
 $
 $2,290
Non-U.S. Plans:       
Short-term investments$7
 $
 $
 $7
Foreign and corporate bonds
 418
 
 418
Equity securities103
 371
 
 474
Total Non-U.S. Plan assets (1)
$110
 $789
 $
 $899
(1)
Excluded from the table above are $494 million and $109 million of other investments measured using NAV as a practical expedient related to the U.S. Plans and Non-U.S. Plans, respectively.

The other postretirement benefit plan had $152 million and $143 million of other investments measured using NAV as a practical expedient, at December 31, 2019 and 2018, respectively. Expected future benefit payments are as follows:$14 million in cash related to the U.S. Plans.
 Pension Benefit Plans  Other Postretirement Benefit Plans
For the years ending December 31U.S. Plans
 Non-U.S. Plans
(in millions of U.S. dollars) 
2020$151
 $27
 $19
2021157
 28
 21
2022164
 27
 22
2023169
 29
 18
2024174
 29
 13
2025-2029931
 171
 11



F-87

F-91


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



December 31, 2019Pension Benefit Plans
(in millions of U.S. dollars)Level 1Level 2Level 3Total
U.S. Plans:
Short-term investments$18 $37 $$55 
U.S. Treasury / Agency466 134 600 
Non-U.S. and corporate bonds749 749 
Municipal
Equity securities1,467 1,467 
Total U.S. Plan assets (1)
$1,951 $922 $$2,873 
Non-U.S. Plans:
Short-term investments$$$$
Non-U.S. and corporate bonds598 598 
Equity securities112 318 430 
Total Non-U.S. Plan assets (1)
$114 $916 $$1,030 
14(1).Excluded from the table above are $428 million and $107 million of other investments related to the U.S. Plans and Non-U.S. Plans, respectively, and limited partnerships of $4 million in Non-U.S. Plans, measured using NAV as a practical expedient.

The other postretirement benefit plan had $120 million and $152 million of other investments measured using NAV as a practical expedient at December 31, 2020 and 2019, respectively.

14. Other income and expense
Year Ended December 31
(in millions of U.S. dollars)2020 20192018 
Equity in net income of partially-owned entities (1)
$1,019 $617 $514 
Gains (losses) from fair value changes in separate account assets (2)
58 44 (38)
Federal excise and capital taxes(22)(23)(12)
Other(61)(42)(30)
Total$994 $596 $434 
(1)     Equity in net income of partially-owned entities includes $167 million, $74 million, and $43 million attributable to our investments in Huatai (Huatai Group, Huatai P&C, and Huatai Life) for the years ended December 31, 2020, 2019, and 2018, respectively.
(2)     Related to gains (losses) from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP.
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Equity in net income of partially-owned entities (1)
$617
 $514
 $418
Gains (losses) from fair value changes in separate account assets (2)
44
 (38) 97
One-time contribution to the Chubb Charitable Foundation
 
 (50)
Federal excise and capital taxes(23) (12) (35)
Other(42) (30) (30)
Total$596
 $434
 $400

(1)
Equity in net income of partially-owned entities includes $74 million, $43 million, and $3 million attributable to our investments in Huatai (Huatai Group, Huatai P&C, and Huatai Life) for the years ended December 31, 2019, 2018, and 2017, respectively.
(2)
Related to gains (losses) from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP.

Other income and expense includes equity in net income of partially-owned entities, which includes our share of net income or loss, both underlying operating income and mark-to-market movement, related to partially-owned investment companies (private equity) and partially-owned insurance companies. Also included in Other income and expense are gains (losses) from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP. The offsetting movement in the separate account liabilities is included in Policy benefits in the Consolidated statements of operations. Certain federal excise and capital taxes incurred as a result of capital management initiatives are included in Other income and expense as these are considered capital transactions and are excluded from underwriting results.


15. Segment information

Chubb operates through six business segments: North America Commercial P&C Insurance, North America Personal P&C Insurance, North America Agricultural Insurance, Overseas General Insurance, Global Reinsurance, and Life Insurance. These segments distribute their products through various forms of brokers, agencies, and direct marketing programs. All business segments have established relationships with reinsurance intermediaries.

The North America Commercial P&C Insurance segment provides both commercial and consumer P&C products and services. This segment includes the business written by Chubb divisions that provide property and casualty (P&C) insurance and services to large, middle market and small commercial businesses in the U.S., Canada, and Bermuda. This segment includes our retail divisions: Major Accounts, Commercial Insurance, including Small Commercial Insurance; and our

F-88


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

wholesale and specialty divisions: Westchester and Chubb Bermuda. These divisions write a variety of coverages, including property, casualty, workers’ compensation, package policies, risk management, financial lines, marine, construction, environmental, medical risk, cyber risk, surety, and excess casualty; as well as group accident and health (A&H) insurance. 

The North America Personal P&C Insurance segment includes the business written by Chubb Personal Risk Services division, which includes high net worth personal lines business, with operations in the U.S. and Canada. This segment provides affluent and high net worth individuals and families with homeowners, automobile and collector cars, valuable articles (including fine arts), personal and excess liability, travel insurance, and recreational marine insurance and services.

The North America Agricultural Insurance segment includes the business written by Rain and Hail Insurance Service, Inc. in the U.S. and Canada, which provides comprehensive multiple peril crop insurance (MPCI) and crop-hail insurance, and Chubb Agribusiness, which offers farm and ranch property as well as specialty P&C coverages, including commercial agriculture products.









F-92


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



The Overseas General Insurance segment includes the business written by two Chubb divisions that provideprovides both commercial and consumer P&C insurance and services in the 51 countries and territories outside of North America where the company operates. Chubb International provides commercial P&C, A&H and traditional and specialty personal lines for large corporations, middle markets and small customers through retail brokers, agents and other channels locally around the world. Chubb Global Markets (CGM) provides commercial P&C excess and surplus lines and A&H through wholesale brokers in the London market and through Lloyd’s. These divisions write a variety of coverages, including traditional commercial P&C, specialty categories such as financial lines, marine, energy, aviation, political risk and construction, as well as group A&H and traditional and specialty personal lines. 

The Global Reinsurance segment includes the reinsurance business written by Chubb Tempest Re, comprising Chubb Tempest Re Bermuda, Chubb Tempest Re USA, Chubb Tempest Re International, and Chubb Tempest Re Canada. Chubb Tempest Re provides a broad range of traditional and specialty reinsurance coverages to a diverse array of primary P&C companies, including small, mid-sized, and multinational ceding companies.

The Life Insurance segment includes Chubb's international life operations written by Chubb Life and Chubb Tempest Life Re, and the North American supplemental A&H and life business of Combined Insurance.

Corporate primarily includes the results of all run-off asbestos and environmental (A&E) exposures, our run-off Brandywine business, and our Westchester specialty operations for 1996 and prior years, and certain other non-A&E run-off exposures. In addition, Corporate includes the results of our non-insurance companies including Chubb Limited, Chubb Group Management and Holdings Ltd., and Chubb INA Holdings Inc. Our exposure to A&E claims principally arises out of liabilities acquired when we purchased Westchester Specialty in 1998, CIGNA’s P&C business in 1999, and The Chubb CorpCorporation (Chubb Corp) in 2016.

In addition, revenue and expenses managed at the corporate level, including realized gains and losses, interest expense, the non-operating income of our partially-owned entities, Chubb integration expenses and income taxes are reported within Corporate. Chubb integration expenses are also reported within Corporate. Chubb integration expenses are one-time costs that are directly attributable toIn addition, the achievementamortization expense of purchased intangibles, amortization of the annualized savings, including employee severance, third-party consulting fees,fair value adjustment on acquired invested assets and systems integration expenses. These items will not be allocated to the segment levelassumed long-term debt as they are one-time in nature and are not related to the ongoing business activitiespart of the segment.Chubb Corp acquisition are considered Corporate costs as these are incurred by the overall company. The Chief Executive Officer does not manage segment results or allocate resources to segments when considering these costs and they are therefore excluded from our definition of segment income (loss). Therefore, segment

Management uses underwriting income (loss) will only includeas the basis for segment performance. Chubb calculates underwriting income (loss) by subtracting Losses and loss expenses, Policy benefits, Policy acquisition costs, and Administrative expenses from Net premiums earned. Segment income (loss) includes underwriting income (loss), net investment income (loss), and other operating income and expense items such as each segment's share of the operating income (loss) related to partially-owned entitiesinsurance companies and miscellaneous income and expense items for which the segments are held accountable. Our main measure of segment performance is Segment income (loss), which also includes amortization of purchased intangibles related to business combination intangible assets acquired by the segment and other purchase accounting related intangible assets, including agency relationships, renewal rights, and client lists. The amortization of intangible assets purchased as part of the Chubb Corp acquisition is considered a Corporate cost as these are incurred by the overall company.segment. We determined that this definition of segment income (loss) is appropriate and aligns with how the business is managed. We continue to evaluate our segments as our business continues to evolve and may further refine our segments and segment income (loss) measures.

For segment reporting purposes, certain items are presented in a different manner below than in the consolidated financial statements. Management uses underwriting income (loss) as the main measures of segment performance. Chubb calculates underwriting income (loss) by subtracting Losses and loss expenses, Policy benefits, Policy acquisition costs, and Administrative expenses from Net premiums earned. To calculate Segment income (loss), include Net investment income (loss), Other (income) expense, and Amortization expense of purchased intangibles. ForCertain items are presented in a different manner for segment reporting purposes than in the North America Agricultural Insurance segment, management includesConsolidated Financial Statements. These items are reconciled to the consolidated presentation in the Segment measure reclass column below and include:


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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

Losses and loss expenses include realized gains and losses on crop derivatives. These derivatives were purchased to provide economic benefit, in a manner similar to reinsurance protection, in the event that a significant decline in commodity pricing impacts underwriting results. We view gains and losses on these derivatives as a componentpart of the results of our underwriting income (loss). For example, for the year ended December 31, 2019, underwriting income in our North America Agricultural Insurance segment was $89 million. This amount includes $8 million of realized losses related to crop derivatives which are reported in Netoperations, and therefore, realized gains (losses) including OTTIfrom these derivatives are reclassified to losses and loss expenses.

Policy benefits include gains and losses from fair value changes in separate account assets, as well as the Corporate column below.

For the Life Insurance segment, management includes Net investment income (loss)offsetting movement in separate account liabilities. The gains and (Gains) losses from fair value changes in separate account assets that do not qualify for separate account reporting under GAAP as components of Life Insurance underwriting income (loss). For example, for the year ended December 31, 2019, Life Insurance underwriting income of $320 million includes Net investment income of $373 millionhave been reclassified from Other (income) expense. We view gains and gainslosses from fair value changes in both separate account assets and liabilities as part of $44 million. Thethe results of our underwriting operations, and therefore these gains from fair value changes in separate account assetsand losses are reported inreclassified to policy benefits.

Net investment income includes investment income reclassified from Other (income) expense related to partially-owned investment companies (private equity partnerships) where our ownership interest is in the table below.excess of three percent. We view investment income from these equity-method private equity partnerships as net investment income.





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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The following tables present the Statement of Operations by segment:
For the Year Ended December 31, 2019 (in millions of U.S. dollars)North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 
Global
Reinsurance

 Life Insurance
 Corporate
 
Chubb
Consolidated

For the Year Ended December 31, 2020 (in millions of U.S. dollars)For the Year Ended December 31, 2020 (in millions of U.S. dollars)North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
Life InsuranceCorporateSegment Measure ReclassChubb
Consolidated
Net premiums written$13,375
 $4,787
 $1,810
 $9,262
 $649
 $2,392
 $
 $32,275
Net premiums written$14,474 $4,920 $1,846 $9,335 $731 $2,514 $0 $0 $33,820 
Net premiums earned12,922
 4,694
 1,795
 8,882
 654
 2,343
 
 31,290
Net premiums earned13,964 4,866 1,822 9,285 698 2,482 0 0 33,117 
Losses and loss expenses8,206
 3,043
 1,608
 4,606
 352
 757
 158
 18,730
Losses and loss expenses10,129 3,187 1,544 5,255 435 724 435 1 21,710 
Policy benefits
 
 
 
 
 740
 
 740
Policy benefits0 0 0 0 0 726 0 58 784 
Policy acquisition costs1,831
 948
 84
 2,501
 169
 620
 
 6,153
Policy acquisition costs1,942 974 123 2,568 174 766 0 0 6,547 
Administrative expenses1,028
 286
 6
 1,033
 35
 323
 319
 3,030
Administrative expenses1,006 270 9 1,034 37 320 303 0 2,979 
Underwriting income (loss)1,857
 417
 97
 742
 98
 (97) (477) 2,637
Underwriting income (loss)887 435 146 428 52 (54)(738)(59)1,097 
Net investment income (loss)2,082
 258
 30
 588
 220
 373
 (125) 3,426
Net investment income (loss)2,061 260 30 534 307 385 (87)(115)3,375 
Other (income) expense(3) 3
 1
 12
 (58) (92) (459) (596)Other (income) expense23 5 1 13 2 (74)(791)(173)(994)
Amortization expense of purchased intangibles
 12
 28
 45
 
 2
 218
 305
Amortization expense of purchased intangibles0 11 27 45 0 4 203 0 290 
Segment income (loss)$3,942
 $660
 $98
 $1,273
 $376
 $366
 $(361) $6,354
Segment income (loss)$2,925 $679 $148 $904 $357 $401 $(237)$(1)$5,176 
Net realized gains (losses) including OTTI            (530) (530)
Net realized gains (losses)Net realized gains (losses)(499)1 (498)
Interest expense            552
 552
Interest expense516 0 516 
Chubb integration expenses            23
 23
Income tax expense            795
 795
Income tax expense629 0 629 
Net income (loss)

 

 

 

 

 

 $(2,261) $4,454
Net income (loss)$(1,881)$0 $3,533 
For the Year Ended December 31, 2019 (in millions of U.S. dollars)North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
Life InsuranceCorporateSegment Measure ReclassChubb
Consolidated
Net premiums written$13,375 $4,787 $1,810 $9,262 $649 $2,392 $$$32,275 
Net premiums earned12,922 4,694 1,795 8,882 654 2,343 31,290 
Losses and loss expenses8,206 3,043 1,616 4,606 352 757 158 (8)18,730 
Policy benefits696 44 740 
Policy acquisition costs1,831 948 84 2,501 169 620 6,153 
Administrative expenses1,028 286 1,033 35 323 319 3,030 
Underwriting income (loss)1,857 417 89 742 98 (53)(477)(36)2,637 
Net investment income (loss)2,109 258 30 588 279 373 (125)(86)3,426 
Other (income) expense24 12 (48)(459)(130)(596)
Amortization expense of purchased intangibles12 28 45 218 305 
Segment income (loss)$3,942 $660 $90 $1,273 $376 $366 $(361)$$6,354 
Net realized gains (losses) including OTTI(522)(8)(530)
Interest expense552 552 
Chubb integration expenses23 23 
Income tax expense795 795 
Net income (loss)$(2,253)$$4,454 
For the Year Ended December 31, 2018 (in millions of U.S. dollars)North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 Global
Reinsurance

 Life Insurance
 Corporate
 Chubb
Consolidated

Net premiums written$12,485
 $4,674
 $1,577
 $8,902
 $671
 $2,270
 $
 $30,579
Net premiums earned12,402
 4,593
 1,569
 8,612
 670
 2,218
 
 30,064
Losses and loss expenses8,000
 3,229
 1,111
 4,429
 479
 766
 53
 18,067
Policy benefits
 
 
 
 
 590
 
 590
Policy acquisition costs1,829
 939
 79
 2,346
 162
 557
 
 5,912
Administrative expenses966
 269
 (9) 1,014
 41
 310
 295
 2,886
Underwriting income (loss)1,607
 156
 388
 823
 (12) (5) (348) 2,609
Net investment income (loss)2,033
 236
 28
 619
 257
 341
 (209) 3,305
Other (income) expense(25) 1
 2
 
 (32) 26
 (406) (434)
Amortization expense of purchased intangibles
 13
 28
 41
 
 2
 255
 339
Segment income (loss)$3,665
 $378
 $386
 $1,401
 $277
 $308
 $(406) $6,009
Net realized gains (losses) including OTTI  

         (652) (652)
Interest expense            641
 641
Chubb integration expenses            59
 59
Income tax expense            695
 695
Net income (loss)

 

 

 

 

 

 $(2,453) $3,962


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F-94


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



For the Year Ended December 31, 2017 (in millions of U.S. dollars)North America Commercial P&C Insurance
 North America Personal P&C Insurance
 North America Agricultural Insurance
 Overseas General Insurance
 
Global
Reinsurance

 Life Insurance
 Corporate
 
Chubb
Consolidated

Net premiums written$12,019
 $4,533
 $1,516
 $8,350
 $685
 $2,141
 $
 $29,244
Net premiums earned12,191
 4,399
 1,508
 8,131
 704
 2,101
 
 29,034
Losses and loss expenses8,287
 3,265
 1,036
 4,281
 561
 739
 285
 18,454
Policy benefits
 
 
 
 
 676
 
 676
Policy acquisition costs1,873
 899
 81
 2,221
 177
 530
 
 5,781
Administrative expenses981
 264
 (8) 982
 44
 303
 267
 2,833
Underwriting income (loss)1,050
 (29) 399
 647
 (78) (147) (552) 1,290
Net investment income (loss)1,961
 226
 25
 610
 273
 313
 (283) 3,125
Other (income) expense1
 4
 2
 (4) (1) (84) (318) (400)
Amortization expense of purchased intangibles
 16
 29
 45
 
 2
 168
 260
Segment income (loss)$3,010
 $177
 $393
 $1,216
 $196
 $248
 $(685) $4,555
Net realized gains (losses) including OTTI            84
 84
Interest expense            607
 607
Chubb integration expenses            310
 310
Income tax benefit            (139) (139)
Net income (loss)
 
 
 
 
 
 $(1,379) $3,861

For the Year Ended December 31, 2018 (in millions of U.S. dollars)North America Commercial P&C InsuranceNorth America Personal P&C InsuranceNorth America Agricultural InsuranceOverseas General InsuranceGlobal
Reinsurance
Life InsuranceCorporateSegment Measure ReclassChubb
Consolidated
Net premiums written$12,485 $4,674 $1,577 $8,902 $671 $2,270 $$$30,579 
Net premiums earned12,402 4,593 1,569 8,612 670 2,218 30,064 
Losses and loss expenses8,000 3,229 1,114 4,429 479 766 53 (3)18,067 
Policy benefits628 (38)590 
Policy acquisition costs1,829 939 79 2,346 162 557 5,912 
Administrative expenses966 269 (9)1,014 41 310 295 2,886 
Underwriting income (loss)1,607 156 385 823 (12)(43)(348)41 2,609 
Net investment income (loss)2,061 236 28 622 289 341 (209)(63)3,305 
Other (income) expense(12)(406)(25)(434)
Amortization expense of purchased intangibles13 28 41 255 339 
Segment income (loss)$3,665 $378 $383 $1,401 $277 $308 $(406)$$6,009 
Net realized gains (losses) including OTTI(649)(3)(652)
Interest expense641 641 
Chubb integration expenses59 59 
Income tax expense695 695 
Net income (loss)$(2,450)$$3,962 
Underwriting assets are reviewed in total by management for purposes of decision-making. Other than Unpaid losses and loss expenses, Future policy benefits, Reinsurance recoverables, Goodwill and Other intangible assets, Chubb does not allocate assets to its segments.


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F-95


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



The following table presents net premiums earned for each segment by line of business:
For the Year Ended December 31
(in millions of U.S. dollars)202020192018
North America Commercial P&C Insurance
Property & other short-tail lines$2,423 $1,987 $1,861 
Casualty & all other10,812 10,136 9,773 
A&H729 799 768 
Total North America Commercial P&C Insurance13,964 12,922 12,402 
North America Personal P&C Insurance
Personal automobile822 829 803 
Personal homeowners3,327 3,183 3,127 
Personal other717 682 663 
Total North America Personal P&C Insurance4,866 4,694 4,593 
North America Agricultural Insurance1,822 1,795 1,569 
Overseas General Insurance
Property & other short-tail lines2,468 2,244 2,134 
Casualty & all other2,738 2,494 2,429 
Personal lines1,981 1,896 1,784 
A&H2,098 2,248 2,265 
Total Overseas General Insurance9,285 8,882 8,612 
Global Reinsurance
Property104 131 123 
Property catastrophe173 142 170 
Casualty & all other421 381 377 
Total Global Reinsurance698 654 670 
Life Insurance
Life1,317 1,101 1,022 
A&H1,165 1,242 1,196 
Total Life Insurance2,482 2,343 2,218 
Total net premiums earned$33,117 $31,290 $30,064 
      
 For the Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
North America Commercial P&C Insurance     
Property & other short-tail lines$1,987
 $1,861
 $1,899
Casualty & all other10,136
 9,773
 9,554
A&H799
 768
 738
Total North America Commercial P&C Insurance12,922
 12,402
 12,191
North America Personal P&C Insurance     
Personal automobile829
 803
 742
Personal homeowners3,183
 3,127
 3,014
Personal other682
 663
 643
Total North America Personal P&C Insurance4,694
 4,593
 4,399
North America Agricultural Insurance1,795
 1,569
 1,508
Overseas General Insurance     
Property & other short-tail lines2,244
 2,134
 2,076
Casualty & all other2,494
 2,429
 2,266
Personal lines1,896
 1,784
 1,609
A&H2,248
 2,265
 2,180
Total Overseas General Insurance8,882
 8,612
 8,131
Global Reinsurance     
Property & other short-tail lines131
 123
 132
Property catastrophe142
 170
 198
Casualty & all other381
 377
 374
Total Global Reinsurance654
 670
 704
Life Insurance     
Life1,101
 1,022
 980
A&H1,242
 1,196
 1,121
Total Life Insurance2,343
 2,218
 2,101
Total net premiums earned$31,290
 $30,064
 $29,034


The following table presents net premiums earned by geographic region. Allocations have been made on the basis of location of risk:
North America
Europe (1)
Asia Pacific / Far EastLatin America
202070 %11 %12 %7 %
201970 %11 %12 %%
201870 %11 %12 %%
(1)     Europe includes Eurasia and Africa regions.

North America
 
Europe (1)

 Asia Pacific / Far East
 Latin America
201970% 11% 12% 7%
201870% 11% 12% 7%
201770% 11% 12% 7%

(1)

Europe includes Eurasia and Africa regions.


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F-96


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



16.16. Earnings per share
Year Ended December 31
(in millions of U.S. dollars, except share and per share data)202020192018
Numerator:
Net income$3,533 $4,454 $3,962 
Denominator:
Denominator for basic earnings per share:
Weighted-average shares outstanding451,602,820 455,910,463 463,629,203 
Denominator for diluted earnings per share:
Share-based compensation plans1,838,692 3,004,200 3,173,145 
Weighted-average shares outstanding
      and assumed conversions
453,441,512 458,914,663 466,802,348 
Basic earnings per share$7.82 $9.77 $8.55 
Diluted earnings per share$7.79 $9.71 $8.49 
Potential anti-dilutive share conversions6,811,966 2,410,337 3,543,188 
 Year Ended December 31 
(in millions of U.S. dollars, except share and per share data)2019
 2018
 2017
Numerator:     
Net income$4,454
 $3,962
 $3,861
Denominator:     
Denominator for basic earnings per share:     
Weighted-average shares outstanding455,910,463
 463,629,203
 467,145,716
Denominator for diluted earnings per share:     
Share-based compensation plans3,004,200
 3,173,145
 4,051,185
Weighted-average shares outstanding
      and assumed conversions
458,914,663
 466,802,348
 471,196,901
Basic earnings per share$9.77
 $8.55
 $8.26
Diluted earnings per share$9.71
 $8.49
 $8.19
Potential anti-dilutive share conversions2,410,337
 3,543,188
 1,776,025


Excluded from weighted-average shares outstanding and assumed conversions is the impact of securities that would have been anti-dilutive during the respective years.

17. Related party transactions

Starr Indemnity & Liability Company and its affiliates (collectively, Starr)
We have a number of agency and reinsurance agreements with Starr, the Chairman of which is related to a member of our senior management team. The Board has reviewed and approved our arrangements with Starr. We have agency, claims services and underwriting services agreements with various Starr subsidiaries. Under the agency agreements,agreement, we secure the ability to sell our insurance policies through Starr as one of our non-exclusive agents for writing policies, contracts, binders, or agreements of insurance or reinsurance. Under the claims services agreements, Starr adjusts the claims under policies and arranges for third party treaty and facultative agreements covering such policies. Under the underwriting services agreements, Starr underwrites insurance policies on our behalf and we agree to reinsure such policies to Starr under one or more quota share reinsurance agreements.

CertainThe agency agreementsagreement also containcontains a profit-sharing arrangement based on loss ratios, triggered if Starr underwrites a minimum of $20 million of annual program business net premiums written on our behalf. No profit share commission has been payable yet under this arrangement. Another agency agreement contains a profit-sharing arrangement based on the earned premiums for the business underwritten by Starr (excluding workers’ compensation) and the reinsurance recoveries associated with excess of loss reinsurance agreements placed by Starr for the business underwritten. No profit share commission under this arrangement has been payable yet. Transactions generated under Starr agreements were as follows:
Year Ended December 31
(in millions of U.S. dollars)202020192018
Consolidated statement of operations
Gross premiums written$507 $394 $411 
Ceded premiums written$253 $207 $188 
Commissions paid$97 $77 $84 
Commissions received$59 $46 $42 
Losses and loss expenses$170 $185 $188 
Consolidated balance sheets
Reinsurance recoverable on losses and loss expenses$432 $440 
Ceded reinsurance premium payable$80 $56 
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Consolidated statement of operations     
Gross premiums written$394
 $411
 $464
Ceded premiums written$207
 $188
 $175
Commissions paid$77
 $84
 $101
Commissions received$46
 $42
 $37
Losses and loss expenses incurred$185
 $188
 $438
Consolidated balance sheets     
Reinsurance recoverable on losses and loss expenses$440
 $514
  
Ceded reinsurance premium payable$56
 $75
  



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Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



ABR Re
We own 12.215.6 percent of the common equity of ABR Reinsurance Capital Holdings Ltd. and warrants to acquire 0.5 percent of additional equity. ABR Reinsurance Capital Holdings Ltd., is the parent company of ABR Reinsurance Ltd. (ABR Re), an independent reinsurance company. Through long-term arrangements, Chubb will be the sole source of reinsurance risks ceded to ABR Re, and BlackRock, Inc. will be ABR Re’s exclusive investment management service provider. As an investor, Chubb is expected to benefit from underwriting profit generated by ABR Re’s reinsuring a wide range of Chubb’s primary insurance business and the income and capital appreciation BlackRock, Inc. seeks to deliver through its investment management services. In addition, Chubb has entered into an arrangement with BlackRock, Inc. under which both Chubb and BlackRock, Inc. will be entitled to an equal share of the aggregate amount of certain fees, including underwriting and investment management performance related fees, in connection with their respective reinsurance and investment management arrangements with ABR Re.

ABR Re is a variable interest entity; however, Chubb is not the primary beneficiary and does not consolidate ABR Re because Chubb does not have the power to control and direct ABR Re’s most significant activities, including investing and underwriting. Our minority ownership interest is accounted for under the equity method of accounting. Chubb cedes premiums to ABR Re and recognizes the associated commissions.

Transactions generated under ABR Re agreements were as follows:
Year Ended December 31
(in millions of U.S. dollars)202020192018
Consolidated statement of operations
Ceded premiums written$350 $321 $329 
Commissions received$100 $92 $96 
Consolidated balance sheets
Reinsurance recoverable on losses and loss expenses$806 $674 
Ceded reinsurance premium payable$67 $62 
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Consolidated statement of operations     
Ceded premiums written$321
 $329
 $342
Commissions received$92
 $96
 $94
Consolidated balance sheets     
Reinsurance recoverable on losses and loss expenses$674
 $557
  
Ceded reinsurance premium payable$62
 $47
  




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NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



18. Statutory financial information

Our subsidiaries file financial statements prepared in accordance with statutory accounting practices prescribed or permitted by insurance regulators. Statutory accounting differs from GAAP in the reporting of certain reinsurance contracts, investments, subsidiaries, acquisition expenses, fixed assets, deferred income taxes, and certain other items. Some jurisdictions impose complex regulatory requirements on insurance companies while other jurisdictions impose fewer requirements. In some jurisdictions, we must obtain licenses issued by governmental authorities to conduct local insurance business. These licenses may be subject to reserves and minimum capital and solvency tests. Jurisdictions may impose fines, censure, and/or criminal sanctions for violation of regulatory requirements. The 20192020 amounts below are based on estimates.

Chubb's insurance and reinsurance subsidiaries are subject to insurance laws and regulations in the jurisdictions in which they operate. These regulations include restrictions that limit the amount of dividends or other distributions, such as loans or cash advances, available to shareholders without prior approval of the local insurance regulatory authorities. The amount of dividends available to be paid in 20202021 without prior approval totals $6.5$6.4 billion.

The statutory capital and surplus of our insurance subsidiaries met regulatory requirements for 2020, 2019, 2018, and 2017.2018. The minimum amounts of statutory capital and surplus necessary to satisfy regulatory requirements was $26.3$29.4 billion and $24.2$26.7 billion for December 31, 20192020 and 2018,2019, respectively. These minimum regulatory capital requirements were significantly lower than the corresponding amounts required by the rating agencies which review Chubb’s insurance and reinsurance subsidiaries.


F-95

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries

The following tables present the combined statutory capital and surplus and statutory net income (loss) of our Property and casualty and Life subsidiaries:
December 31
(in millions of U.S. dollars)20202019
Statutory capital and surplus
Property and casualty$45,964 $43,077 
Life$1,641 $1,573 
 December 31 
(in millions of U.S. dollars)2019
 2018
Statutory capital and surplus   
Property and casualty$43,684
 $40,780
Life$1,900
 $1,279
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Statutory net income (loss)     
Property and casualty$5,931
 $7,521
 $8,178
Life$(227) $(102) $49

Year Ended December 31
(in millions of U.S. dollars)202020192018
Statutory net income (loss)
Property and casualty$4,294 $6,046 $7,521 
Life$(247)$(210)$(102)

Several insurance subsidiaries follow accounting practices prescribed or permitted by the jurisdiction of domicile that differ from the applicable local statutory practice. The application of prescribed or permitted accounting practices does not have a material impact on Chubb's statutory surplus and income. As prescribed by the Restructuring discussed previously in Note 7, certain of our U.S. subsidiaries discount certain A&E liabilities, which increased statutory capital and surplus by approximately $147$140 million and $160$147 million at December 31, 20192020 and 2018,2019, respectively.

Federal Insurance Company (Federal), a direct subsidiary of Chubb INA Holdings Inc., has a permitted practice granted by the Indiana Department of Insurance that relates to its investments in foreign subsidiaries and affiliates. Under Statement of Statutory Accounting Principles No. 97, Investments in Subsidiary, Controlled and Affiliated Entities, A Replacement of SSAP No. 88, in order for a reporting entity to admit its investments in foreign subsidiaries and affiliates, audited financial statements of the subsidiary or affiliate must be obtained to support the carrying value. Such financial statements must be prepared in accordance with U.S. GAAP, or alternatively, in accordance with the local statutory requirements in the subsidiary’s or affiliate’s country of domicile, with an audited footnote reconciliation of net income and shareholder’s equity as reported to a U.S. GAAP basis. With the explicit permission of the Indiana Department of Insurance, Federal obtains audited financial statements for its admitted foreign subsidiaries and affiliates, which had an aggregate carrying value of approximately $54$55 million and $178$54 million at December 31, 20192020 and 2018,2019, respectively, prepared in accordance with their respective local statutory requirements and supplemented with a separate unaudited reconciliation of shareholder’s equity as reported to a U.S. GAAP basis.























F-99F-96


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



19. Information provided in connection with outstanding debt of subsidiaries

The following tables present condensed consolidating financial information at December 31, 20192020 and December 31, 2018,2019, and for the years ended December 31, 2020, 2019, 2018, and 20172018 for Chubb Limited (Parent Guarantor) and Chubb INA Holdings Inc. (Subsidiary Issuer). The Subsidiary Issuer is an indirect 100 percent-owned subsidiary of the Parent Guarantor. The Parent Guarantor fully and unconditionally guarantees certain of the debt of the Subsidiary Issuer. Condensed consolidating financial information of the Parent Guarantor and Subsidiary Issuer are presented on the equity method of accounting. The revenues and expenses and cash flows of the subsidiaries of the Subsidiary Issuer are presented in the Other Chubb Limited Subsidiaries column on a combined basis.

Condensed Consolidating Balance Sheet at December 31, 20192020
(in millions of U.S. dollars)Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
Assets
Investments$0 $197 $118,472 $0 $118,669 
Cash (1)
84 1 1,934 (272)1,747 
Restricted Cash0 0 89 0 89 
Insurance and reinsurance balances receivable0 0 13,926 (3,446)10,480 
Reinsurance recoverable on losses and loss expenses0 0 25,217 (9,625)15,592 
Reinsurance recoverable on policy benefits0 0 299 (93)206 
Value of business acquired0 0 263 0 263 
Goodwill and other intangible assets0 0 21,211 0 21,211 
Investments in subsidiaries56,148 55,231 0 (111,379)0 
Due from subsidiaries and affiliates, net3,522 0 171 (3,693)0 
Other assets10 463 23,921 (1,877)22,517 
Total assets$59,764 $55,892 $205,503 $(130,385)$190,774 
Liabilities
Unpaid losses and loss expenses$0 $0 $77,180 $(9,369)$67,811 
Unearned premiums0 0 18,853 (1,201)17,652 
Future policy benefits0 0 5,806 (93)5,713 
Due to subsidiaries and affiliates, net0 3,008 685 (3,693)0 
Affiliated notional cash pooling programs(1)
0 272 0 (272)0 
Repurchase agreements0 0 1,405 0 1,405 
Long-term debt0 14,948 0 0 14,948 
Trust preferred securities0 308 0 0 308 
Other liabilities323 1,418 26,133 (4,378)23,496 
Total liabilities323 19,954 130,062 (19,006)131,333 
Total shareholders’ equity59,441 35,938 75,441 (111,379)59,441 
Total liabilities and shareholders’ equity$59,764 $55,892 $205,503 $(130,385)$190,774 
(1)     Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2020, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.
(in millions of U.S. dollars)
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

Assets         
Investments$
 $1,013
 $108,221
 $
 $109,234
Cash (1)
2
 442
 1,093
 
 1,537
Restricted Cash
 
 109
 
 109
Insurance and reinsurance balances receivable
 
 12,920
 (2,563) 10,357
Reinsurance recoverable on losses and loss expenses
 
 24,780
 (9,599) 15,181
Reinsurance recoverable on policy benefits
 
 292
 (95) 197
Value of business acquired
 
 306
 
 306
Goodwill and other intangible assets
 
 21,359
 
 21,359
Investments in subsidiaries50,853
 52,076
 
 (102,929) 
Due from subsidiaries and affiliates, net4,776
 
 
 (4,776) 
Other assets12
 408
 20,072
 (1,829) 18,663
Total assets$55,643
 $53,939
 $189,152
 $(121,791) $176,943
Liabilities         
Unpaid losses and loss expenses$
 $
 $71,916
 $(9,226) $62,690
Unearned premiums
 
 17,978
 (1,207) 16,771
Future policy benefits
 
 5,909
 (95) 5,814
Due to subsidiaries and affiliates, net
 4,446
 330
 (4,776) 
Repurchase agreements
 
 1,416
 
 1,416
Short-term debt
 1,298
 1
 
 1,299
Long-term debt
 13,559
 
 
 13,559
Trust preferred securities
 308
 
 
 308
Other liabilities312
 1,649
 21,352
 (3,558) 19,755
Total liabilities312
 21,260
 118,902
 (18,862) 121,612
Total shareholders’ equity55,331
 32,679
 70,250
 (102,929) 55,331
Total liabilities and shareholders’ equity$55,643
 $53,939
 $189,152
 $(121,791) $176,943

(1)

Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.


Subsequent Events
In January 2020, Chubb INA Holdings Inc. paid $1.5 billion towards the series of intercompany loans involving its parents, Chubb Group Holdings Inc. and Chubb Limited. Additionally, Chubb Limited contributed $1.2 billion to a subsidiary included in Other Chubb Limited Subsidiaries.



F-100F-97

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries






Condensed Consolidating Balance Sheet at December 31, 20182019
(in millions of U.S. dollars)Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
Assets
Investments$$1,013 $108,221 $$109,234 
Cash (1)
442 1,093 1,537 
Restricted Cash109 109 
Insurance and reinsurance balances receivable12,920 (2,563)10,357 
Reinsurance recoverable on losses and loss expenses24,780 (9,599)15,181 
Reinsurance recoverable on policy benefits292 (95)197 
Value of business acquired306 306 
Goodwill and other intangible assets21,359 21,359 
Investments in subsidiaries50,853 52,076 (102,929)
Due from subsidiaries and affiliates, net4,776 (4,776)
Other assets12 408 20,072 (1,829)18,663 
Total assets$55,643 $53,939 $189,152 $(121,791)$176,943 
Liabilities
Unpaid losses and loss expenses$$$71,916 $(9,226)$62,690 
Unearned premiums17,978 (1,207)16,771 
Future policy benefits5,468 (95)5,373 
Due to subsidiaries and affiliates, net4,446 330 (4,776)
Repurchase agreements1,416 1,416 
Short-term debt1,298 1,299 
Long-term debt13,559 13,559 
Trust preferred securities308 308 
Other liabilities312 1,649 21,793 (3,558)20,196 
Total liabilities312 21,260 118,902 (18,862)121,612 
Total shareholders’ equity55,331 32,679 70,250 (102,929)55,331 
Total liabilities and shareholders’ equity$55,643 $53,939 $189,152 $(121,791)$176,943 
(1)Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.














(in millions of U.S. dollars)
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

Assets         
Investments$
 $214
 $100,754
 $
 $100,968
Cash (1)
1
 2
 1,896
 (652) 1,247
Restricted Cash
 
 93
 
 93
Insurance and reinsurance balances receivable
 
 11,861
 (1,786) 10,075
Reinsurance recoverable on losses and loss expenses
 
 26,422
 (10,429) 15,993
Reinsurance recoverable on policy benefits
 
 306
 (104) 202
Value of business acquired
 
 295
 
 295
Goodwill and other intangible assets
 
 21,414
 
 21,414
Investments in subsidiaries43,531
 50,209
 
 (93,740) 
Due from subsidiaries and affiliates, net7,074
 
 598
 (7,672) 
Other assets3
 1,007
 18,102
 (1,628) 17,484
Total assets$50,609
 $51,432
 $181,741
 $(116,011) $167,771
Liabilities         
Unpaid losses and loss expenses$
 $
 $72,857
 $(9,897) $62,960
Unearned premiums
 
 16,611
 (1,079) 15,532
Future policy benefits
 
 5,610
 (104) 5,506
Due to subsidiaries and affiliates, net
 7,672
 
 (7,672) 
Affiliated notional cash pooling programs (1)
35
 617
 
 (652) 
Repurchase agreements
 
 1,418
 
 1,418
Short-term debt
 500
 9
 
 509
Long-term debt
 12,086
 1
 
 12,087
Trust preferred securities
 308
 
 
 308
Other liabilities262
 2,545
 19,199
 (2,867) 19,139
Total liabilities297
 23,728
 115,705
 (22,271) 117,459
Total shareholders’ equity50,312
 27,704
 66,036
 (93,740) 50,312
Total liabilities and shareholders’ equity$50,609
 $51,432
 $181,741
 $(116,011) $167,771
(1)F-98
Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.













F-101

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries






Condensed Consolidating Statements of Operations and Comprehensive Income
For the Year Ended December 31, 2019
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

(in millions of U.S. dollars)    
Net premiums written$
 $
 $32,275
 $
 $32,275
Net premiums earned
 
 31,290
 
 31,290
Net investment income1
 (15) 3,440
 
 3,426
Equity in earnings of subsidiaries4,307
 3,022
 
 (7,329) 
Net realized gains (losses) including OTTI(17) (31) (482) 
 (530)
Losses and loss expenses
 
 18,730
 
 18,730
Policy benefits
 
 740
 
 740
Policy acquisition costs and administrative expenses92
 (26) 9,117
 
 9,183
Interest (income) expense(243) 705
 90
 
 552
Other (income) expense(27) 6
 (575) 
 (596)
Amortization of purchased intangibles
 
 305
 
 305
Chubb integration expenses1
 2
 20
 
 23
Income tax expense (benefit)14
 (175) 956
 
 795
Net income$4,454
 $2,464
 $4,865
 $(7,329) $4,454
Comprehensive income$7,521
 $4,988
 $7,922
 $(12,910) $7,521

For the Year Ended December 31, 2020Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
(in millions of U.S. dollars)
Net premiums written$0 $0 $33,820 $0 $33,820 
Net premiums earned0 0 33,117 0 33,117 
Net investment income(1)6 3,370 0 3,375 
Equity in earnings of subsidiaries3,457 2,052 0 (5,509)0 
Net realized gains (losses)20 (397)(121)0 (498)
Losses and loss expenses0 0 21,710 0 21,710 
Policy benefits0 0 784 0 784 
Policy acquisition costs and administrative
expenses
94 (130)9,562 0 9,526 
Interest (income) expense(136)596 56 0 516 
Other (income) expense(39)(24)(931)0 (994)
Amortization of purchased intangibles0 0 290 0 290 
Income tax expense (benefit)24 (181)786 0 629 
Net income$3,533 $1,400 $4,109 $(5,509)$3,533 
Comprehensive income$5,783 $3,236 $6,512 $(9,748)$5,783 

Condensed Consolidating Statements of Operations and Comprehensive Income (Loss)
For the Year Ended December 31, 2018
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

For the Year Ended December 31, 2019For the Year Ended December 31, 2019Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
(in millions of U.S. dollars)
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

(in millions of U.S. dollars)
Net premiums written Net premiums written$$$32,275 $$32,275 
Net premiums earned
 
 30,064
 
 30,064
Net premiums earned31,290 31,290 
Net investment income6
 13
 3,286
 
 3,305
Net investment income(15)3,440 3,426 
Equity in earnings of subsidiaries3,753
 2,578
 
 (6,331) 
Equity in earnings of subsidiaries4,307 3,022 (7,329)
Net realized gains (losses) including OTTI
 117
 (769) 
 (652)Net realized gains (losses) including OTTI(17)(31)(482)(530)
Losses and loss expenses
 
 18,067
 
 18,067
Losses and loss expenses18,730 18,730 
Policy benefits
 
 590
 
 590
Policy benefits740 740 
Policy acquisition costs and administrative expenses87
 (58) 8,769
 
 8,798
Policy acquisition costs and administrative expenses92 (26)9,117 9,183 
Interest (income) expense(299) 806
 134
 
 641
Interest (income) expense(243)705 90 552 
Other (income) expense(24) 26
 (436) 
 (434)Other (income) expense(27)(575)(596)
Amortization of purchased intangibles
 
 339
 
 339
Amortization of purchased intangibles305 305 
Chubb integration expenses14
 1
 44
 
 59
Chubb integration expenses20 23 
Income tax expense (benefit)19
 (148) 824
 
 695
Income tax expense (benefit)14 (175)956 795 
Net income$3,962
 $2,081
 $4,250
 $(6,331) $3,962
Net income$4,454 $2,464 $4,865 $(7,329)$4,454 
Comprehensive income (loss)$1,242
 $(27) $1,808
 $(1,781) $1,242
Comprehensive incomeComprehensive income$7,521 $4,988 $7,922 $(12,910)$7,521 




F-102F-99

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries






Condensed Consolidating Statements of Operations and Comprehensive Income
(Loss)
For the Year Ended December 31, 2017
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

For the Year Ended December 31, 2018For the Year Ended December 31, 2018Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
(in millions of U.S. dollars)
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

(in millions of U.S. dollars)
Net premiums written Net premiums written$$$30,579 $$30,579 
Net premiums earned
 
 29,034
 
 29,034
Net premiums earned30,064 30,064 
Net investment income4
 14
 3,107
 
 3,125
Net investment income13 3,286 3,305 
Equity in earnings of subsidiaries3,640
 2,424
 
 (6,064) 
Equity in earnings of subsidiaries3,753 2,578 (6,331)
Net realized gains (losses) including OTTI
 (25) 109
 
 84
Net realized gains (losses) including OTTI117 (769)(652)
Losses and loss expenses
 
 18,454
 
 18,454
Losses and loss expenses18,067 18,067 
Policy benefits
 
 676
 
 676
Policy benefits590 590 
Policy acquisition costs and administrative expenses75
 40
 8,499
 
 8,614
Policy acquisition costs and administrative expenses87 (58)8,769 8,798 
Interest (income) expense(332) 847
 92
 
 607
Interest (income) expense(299)806 134 641 
Other (income) expense(12) 93
 (481) 
 (400)Other (income) expense(24)26 (436)(434)
Amortization of purchased intangibles
 
 260
 
 260
Amortization of purchased intangibles339 339 
Chubb integration expenses32
 69
 209
 
 310
Chubb integration expenses14 44 59 
Income tax expense (benefit)20
 (742) 583
 
 (139)Income tax expense (benefit)19 (148)824 695 
Net income$3,861
 $2,106
 $3,958
 $(6,064) $3,861
Net income$3,962 $2,081 $4,250 $(6,331)$3,962 
Comprehensive income$4,718
 $3,075
 $4,430
 $(7,505) $4,718
Comprehensive income (loss)Comprehensive income (loss)$1,242 $(27)$1,808 $(1,781)$1,242 





F-103F-100

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Condensed Consolidating Statement of Cash Flows 
For the Year Ended December 31, 2020Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities$1,933 $274 $10,788 $(3,210)$9,785 
Cash flows from investing activities
Purchases of fixed maturities available for sale0 (49)(26,249)0 (26,298)
Purchases of fixed maturities held to maturity0 0 (202)0 (202)
Purchases of equity securities0 0 (6,419)0 (6,419)
Sales of fixed maturities available for sale0 9 11,368 0 11,377 
Sales of equity securities0 0 3,880 0 3,880 
Maturities and redemptions of fixed maturities available for sale0 50 12,400 0 12,450 
Maturities and redemptions of fixed maturities held to maturity0 0 995 0 995 
Net change in short-term investments0 772 (853)0 (81)
Net derivative instruments settlements0 55 (168)0 (113)
Private equity contributions0 0 (1,924)0 (1,924)
Private equity distributions0 0 907 0 907 
Payment, including deposit, for Huatai Group interest0 0 (1,623)0 (1,623)
Capital contribution(1,200)(72)0 1,272 0 
Other(2)4 (472)0 (470)
Net cash flows from (used for) investing activities(1,202)769 (8,360)1,272 (7,521)
Cash flows from financing activities
Dividends paid on Common Shares(1,388)0 0 0 (1,388)
Common Shares repurchased(523)0 0 0 (523)
Proceeds from issuance of long-term debt0 988 0 0��988 
Proceeds from issuance of repurchase agreements0 0 2,354 0 2,354 
Repayment of long-term debt0 (1,301)0 0 (1,301)
Repayment of repurchase agreements0 0 (2,354)0 (2,354)
Proceeds from share-based compensation plans0 0 145 0 145 
Advances (to) from affiliates1,265 (1,438)173 0 0 
Dividends to parent company0 0 (3,210)3,210 0 
Capital contribution0 0 1,272 (1,272)0 
Net proceeds from affiliated notional cash pooling programs(1)
0 272 0 (272)0 
Policyholder contract deposits and other0 0 470 0 470 
Policyholder contract withdrawals and other0 0 (386)0 (386)
Other0 0 (87)0 (87)
Net cash flows used for financing activities(646)(1,479)(1,623)1,666 (2,082)
Effect of foreign currency rate changes on cash and
restricted cash
(3)(5)16 0 8 
Net increase (decrease) in cash and restricted cash82 (441)821 (272)190 
Cash and restricted cash – beginning of year (1)
2 442 1,202 0 1,646 
Cash and restricted cash – end of year (1)
$84 $1 $2,023 $(272)$1,836 
For the Year Ended December 31, 2019
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

(in millions of U.S. dollars)    
Net cash flows from operating activities$412
 $2,926
 $6,878
 $(3,874) $6,342
Cash flows from investing activities         
Purchases of fixed maturities available for sale
 (21) (25,825) 
 (25,846)
Purchases of fixed maturities held to maturity
 
 (229) 
 (229)
Purchases of equity securities
 
 (531) 
 (531)
Sales of fixed maturities available for sale
 1
 13,115
 
 13,116
Sales of equity securities
 
 611
 
 611
Maturities and redemptions of fixed maturities available for sale
 41
 8,998
 
 9,039
Maturities and redemptions of fixed maturities held to maturity
 
 946
 
 946
Net change in short-term investments
 (808) (309) 
 (1,117)
Net derivative instruments settlements
 (74) (629) 
 (703)
Private equity contribution
 
 (1,315) 
 (1,315)
Private equity distribution
 
 1,390
 
 1,390
Capital contribution(1,000) (110) 
 1,110
 
Acquisition of subsidiaries (net of cash acquired of $45)
 
 (29) 
 (29)
Other
 (4) (1,233) 
 (1,237)
Net cash flows used for investing activities(1,000) (975) (5,040) 1,110
 (5,905)
Cash flows from financing activities         
Dividends paid on Common Shares(1,354) 
 
 
 (1,354)
Common Shares repurchased(327) 
 (1,203) 
 (1,530)
Proceeds from issuance of long-term debt
 2,828
 
 
 2,828
Proceeds from issuance of repurchase agreements
 
 2,817
 
 2,817
Repayment of long-term debt
 (500) (10) 
 (510)
Repayment of repurchase agreements
 
 (2,817) 
 (2,817)
Proceeds from share-based compensation plans
 
 204
 
 204
Advances (to) from affiliates2,301
 (3,223) 922
 
 
Dividends to parent company
 
 (3,874) 3,874
 
Capital contribution
 
 1,110
 (1,110) 
Net payments to affiliated notional cash pooling programs(1)
(35) (617) 
 652
 
Policyholder contract deposits
 
 514
 
 514
Policyholder contract withdrawals
 
 (303) 
 (303)
Net cash flows from (used for) financing activities585
 (1,512) (2,640) 3,416
 (151)
Effect of foreign currency rate changes on cash and restricted cash4
 1
 15
 
 20
Net increase (decrease) in cash and restricted cash1
 440
 (787) 652
 306
Cash and restricted cash – beginning of year (1)
1
 2
 1,989
 (652) 1,340
Cash and restricted cash – end of year (1)
$2
 $442
 $1,202
 $
 $1,646
(1)
Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2018,(1)Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2020, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.


F-104F-101

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



Condensed Consolidating Statement of Cash Flows
For the Year Ended December 31, 2018
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

(in millions of U.S. dollars)    
Net cash flows from operating activities$256
 $4,654
 $5,878
 $(5,308) $5,480
Cash flows from investing activities         
Purchases of fixed maturities available for sale
 (38) (24,697) 
 (24,735)
Purchases of fixed maturities held to maturity
 
 (456) 
 (456)
Purchases of equity securities
 
 (207) 
 (207)
Sales of fixed maturities available for sale
 11
 14,019
 
 14,030
Sales of equity securities
 
 315
 
 315
Maturities and redemptions of fixed maturities available for sale
 17
 7,335
 
 7,352
Maturities and redemptions of fixed maturities held to maturity
 
 1,124
 
 1,124
Net change in short-term investments
 3
 513
 
 516
Net derivative instruments settlements
 (7) 23
 
 16
Private equity contributions
 
 (1,337) 
 (1,337)
Private equity distributions
 
 980
 
 980
Capital contribution(1,475) (3,550) 
 5,025
 
Other
 (18) (515) 
 (533)
Net cash flows used for investing activities(1,475) (3,582) (2,903) 5,025
 (2,935)
Cash flows from financing activities         
Dividends paid on Common Shares(1,337) 
 
 
 (1,337)
Common Shares repurchased
 
 (1,044) 
 (1,044)
Proceeds from issuance of long-term debt
 2,171
 
 
 2,171
Proceeds from issuance of repurchase agreements
 
 2,029
 
 2,029
Repayment of long-term debt
 (2,000) (1) 
 (2,001)
Repayment of repurchase agreements
 
 (2,019) 
 (2,019)
Proceeds from share-based compensation plans
 
 115
 
 115
Advances (to) from affiliates2,519
 (1,744) (775) 
 
Dividends to parent company
 
 (5,308) 5,308
 
Capital contribution
 
 5,025
 (5,025) 
Net payments to affiliated notional cash pooling programs(1)
35
 502
 
 (537) 
Policyholder contract deposits
 
 453
 
 453
Policyholder contract withdrawals
 
 (358) 
 (358)
Net cash flows from (used for) financing activities1,217
 (1,071) (1,883) (254) (1,991)
Effect of foreign currency rate changes on cash and restricted cash
 
 (65) 
 (65)
Net increase (decrease) in cash and restricted cash(2) 1
 1,027
 (537) 489
Cash and restricted cash – beginning of year (1)
3
 1
 962
 (115) 851
Cash and restricted cash – end of year (1)
$1
 $2
 $1,989
 $(652) $1,340
(1)
Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2018 and 2017, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.


F-105

Table of Contents

NOTES TO CONSOLIDATED FINANCIAL STATEMENTS(continued)
Chubb Limited and Subsidiaries



Condensed Consolidating Statement of Cash Flows
For the Year Ended December 31, 2019Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities$412 $2,926 $6,878 $(3,874)$6,342 
Cash flows from investing activities
Purchases of fixed maturities available for sale(21)(25,825)(25,846)
Purchases of fixed maturities held to maturity(229)(229)
Purchases of equity securities(531)(531)
Sales of fixed maturities available for sale13,115 13,116 
Sales of equity securities611 611 
Maturities and redemptions of fixed maturities available for sale41 8,998 9,039 
Maturities and redemptions of fixed maturities held to maturity946 946 
Net change in short-term investments(808)(309)(1,117)
Net derivative instruments settlements(74)(629)(703)
Private equity contributions(1,315)(1,315)
Private equity distributions1,390 1,390 
Capital contribution(1,000)(110)1,110 
Acquisition of subsidiaries (net of cash acquired of $45)(29)(29)
Payment, including deposit, for Huatai Group interest(580)(580)
Other(4)(653)(657)
Net cash flows used for investing activities(1,000)(975)(5,040)1,110 (5,905)
Cash flows from financing activities
Dividends paid on Common Shares(1,354)(1,354)
Common Shares repurchased(327)(1,203)(1,530)
Proceeds from issuance of long-term debt2,828 2,828 
Proceeds from issuance of repurchase agreements2,817 2,817 
Repayment of long-term debt(500)(10)(510)
Repayment of repurchase agreements(2,817)(2,817)
Proceeds from share-based compensation plans204 204 
Advances (to) from affiliates2,301 (3,223)922 
Dividends to parent company(3,874)3,874 
Capital contribution1,110 (1,110)
Net proceeds payments to affiliated notional cash pooling programs(1)
(35)(617)652 
Policyholder contract deposits514 514 
Policyholder contract withdrawals(303)(303)
Net cash flows from (used for) financing activities585 (1,512)(2,640)3,416 (151)
Effect of foreign currency rate changes on cash and restricted cash15 20 
Net increase (decrease) in cash and restricted cash440 (787)652 306 
Cash and restricted cash – beginning of year (1)
1,989 (652)1,340 
Cash and restricted cash – end of year (1)
$$442 $1,202 $$1,646 
For the Year Ended December 31, 2017
Chubb Limited
(Parent
Guarantor)

 
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)

 
Other Chubb
Limited
Subsidiaries

 
Consolidating
Adjustments and Eliminations

 
Chubb Limited
Consolidated

(in millions of U.S. dollars)    
Net cash flows from operating activities$781
 $1,648
 $4,598
 $(2,524) $4,503
Cash flows from investing activities         
Purchases of fixed maturities available for sale
 (9) (25,738) 
 (25,747)
Purchases of fixed maturities held to maturity
 
 (352) 
 (352)
Purchases of equity securities
 
 (173) 
 (173)
Sales of fixed maturities available for sale
 99
 13,156
 
 13,255
Sales of equity securities
 
 187
 
 187
Maturities and redemptions of fixed maturities available for sale
 29
 10,396
 
 10,425
Maturities and redemptions of fixed maturities held to maturity
 
 879
 
 879
Net change in short-term investments
 189
 (726) 
 (537)
Net derivative instruments settlements
 (15) (250) 
 (265)
Private equity contributions
 
 (648) 
 (648)
Private equity distributions
 
 1,084
 
 1,084
Other
 (10) (520) 
 (530)
Net cash flows from (used for) investing activities
 283
 (2,705) 
 (2,422)
Cash flows from financing activities         
Dividends paid on Common Shares(1,308) 
 
 
 (1,308)
Common Shares repurchased
 
 (801) 
 (801)
Proceeds from issuance of long-term debt
 
 
 
 
Proceeds from issuance of repurchase agreements
 
 2,353
 
 2,353
Repayment of long-term debt
 (500) (1) 
 (501)
Repayment of repurchase agreements
 
 (2,348) 
 (2,348)
Proceeds from share-based compensation plans
 
 151
 
 151
Advances (to) from affiliates892
 (927) 35
 
 
Dividends to parent company
 
 (2,524) 2,524
 
Net payments to affiliated notional cash pooling programs(1)
(363) (504) 
 867
 
Policyholder contract deposits
 
 442
 
 442
Policyholder contract withdrawals
 
 (307) 
 (307)
Net cash flows used for financing activities(779) (1,931) (3,000) 3,391
 (2,319)
Effect of foreign currency rate changes on cash and restricted cash
 
 1
 
 1
Net increase (decrease) in cash and restricted cash

2
 
 (1,106) 867
 (237)
Cash and restricted cash – beginning of year (1)
1
 1
 2,068
 (982) 1,088
Cash and restricted cash – end of year (1)
$3
 $1
 $962
 $(115) $851
(1)Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2018, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.

(1)
F-102
Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information. At December 31, 2017 and 2016, the cash balance of one or more entities was negative; however, the overall Pool balances were positive.


F-106


NOTES TO CONSOLIDATED FINANCIAL STATEMENTS (continued)
Chubb Limited and Subsidiaries



20. Condensed unaudited quarterly financial data
 Three Months Ended 
 March 31
 June 30
 September 30
 December 31
(in millions of U.S. dollars, except per share data)2019
 2019
 2019
 2019
Net premiums earned$7,137
 $7,891
 $8,327
 $7,935
Net investment income836
 859
 873
 858
Net realized gains (losses) including OTTI losses(97) (223) (155) (55)
Total revenues$7,876
 $8,527
 $9,045
 $8,738
Losses and loss expenses$4,098
 $4,715
 $5,052
 $4,865
Policy benefits$196
 $161
 $158
 $225
Net income$1,040
 $1,150
 $1,091
 $1,173
Basic earnings per share$2.27
 $2.52
 $2.40
 $2.59
Diluted earnings per share$2.25
 $2.50
 $2.38
 $2.57


 Three Months Ended 
 March 31
 June 30
 September 30
 December 31
(in millions of U.S. dollars, except per share data)2018
 2018
 2018
 2018
Net premiums earned$7,027
 $7,664
 $7,908
 $7,465
Net investment income806
 828
 823
 848
Net realized gains (losses) including OTTI losses(2) 18
 19
 (687)
Total revenues$7,831
 $8,510
 $8,750
 $7,626
Losses and loss expenses$4,102
 $4,487
 $4,868
 $4,610
Policy benefits$151
 $150
 $127
 $162
Net income$1,082
 $1,294
 $1,231
 $355
Basic earnings per share$2.32
 $2.78
 $2.66
 $0.77
Diluted earnings per share$2.30
 $2.76
 $2.64
 $0.76

Condensed Consolidating Statement of Cash Flows

For the Year Ended December 31, 2018Chubb Limited
(Parent
Guarantor)
Chubb INA
Holdings Inc.
(Subsidiary
Issuer)
Other Chubb
Limited
Subsidiaries
Consolidating
Adjustments and Eliminations
Chubb Limited
Consolidated
(in millions of U.S. dollars)
Net cash flows from operating activities$256 $4,654 $5,878 $(5,308)$5,480 
Cash flows from investing activities
Purchases of fixed maturities available for sale(38)(24,697)(24,735)
Purchases of fixed maturities held to maturity(456)(456)
Purchases of equity securities(207)(207)
Sales of fixed maturities available for sale11 14,019 14,030 
Sales of equity securities315 315 
Maturities and redemptions of fixed maturities available for sale17 7,335 7,352 
Maturities and redemptions of fixed maturities held to maturity1,124 1,124 
Net change in short-term investments513 516 
Net derivative instruments settlements(7)23 16 
Private equity contributions(1,337)(1,337)
Private equity distributions980 980 
Capital contribution(1,475)(3,550)5,025 
Other(18)(515)(533)
Net cash flows used for investing activities(1,475)(3,582)(2,903)5,025 (2,935)
Cash flows from financing activities
Dividends paid on Common Shares(1,337)(1,337)
Common Shares repurchased(1,044)(1,044)
Proceeds from issuance of long-term debt2,171 2,171 
Proceeds from issuance of repurchase agreements2,029 2,029 
Repayment of long-term debt(2,000)(1)(2,001)
Repayment of repurchase agreements(2,019)(2,019)
Proceeds from share-based compensation plans115 115 
Advances (to) from affiliates2,519 (1,744)(775)
Dividends to parent company(5,308)5,308 
Capital contribution5,025 (5,025)
Net payments to affiliated notional cash pooling programs(1)
35 502 (537)
Policyholder contract deposits453 453 
Policyholder contract withdrawals(358)(358)
Net cash flows from (used for) financing activities1,217 (1,071)(1,883)(254)(1,991)
Effect of foreign currency rate changes on cash and restricted cash(65)(65)
Net increase (decrease) in cash and restricted cash(2)1,027 (537)489 
Cash and restricted cash – beginning of year (1)
962 (115)851 
Cash and restricted cash – end of year (1)
$$$1,989 $(652)$1,340 
Net income(1)Chubb maintains two notional multi-currency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for the three months endedadditional information.At December 31, 2018 included after-tax catastrophe lossesand 2017, the cash balance of $506 million.


one or more entities was negative; however, the overall Pool balances were positive.

F-107F-103


SCHEDULE I
Chubb Limited and Subsidiaries



SUMMARY OF INVESTMENTS – OTHER THAN INVESTMENTS IN RELATED PARTIES
December 31, 2020
(in millions of U.S. dollars)
Cost or
Amortized Cost, Net (1)
Fair ValueAmount at Which Shown in the Balance Sheet
Fixed maturities available for sale
U.S. Treasury / Agency$2,471 $2,670 $2,670 
Non-U.S.24,588 26,354 26,354 
Corporate and asset-backed securities34,081 36,331 36,331 
Mortgage-backed securities17,456 18,470 18,470 
Municipal6,572 6,874 6,874 
Total fixed maturities available for sale85,168 90,699 90,699 
Fixed maturities held to maturity
U.S. Treasury / Agency1,392 1,452 1,392 
Non-U.S.1,288 1,405 1,288 
Corporate and asset-backed securities2,150 2,438 2,150 
Mortgage-backed securities1,999 2,146 1,999 
Municipal4,824 5,069 4,824 
Total fixed maturities held to maturity11,653 12,510 11,653 
Equity securities
Industrial, miscellaneous, and all other4,027 4,027 4,027 
Short-term investments4,349 4,345 4,345 
Other investments (2)
7,826 7,826 7,826 
Total investments - other than investments in related parties$113,023 $119,407 $118,550 
December 31, 2019
(in millions of U.S. dollars)
Cost or
Amortized Cost

 Fair Value
 Amount at Which Shown in the Balance Sheet
Fixed maturities available for sale     
U.S. Treasury and agency$3,188
 $3,283
 $3,283
Foreign22,670
 23,707
 23,707
Corporate securities30,689
 31,791
 31,791
Mortgage-backed securities18,712
 19,192
 19,192
States, municipalities, and political subdivisions7,321
 7,515
 7,515
Total fixed maturities available for sale82,580
 85,488
 85,488
Fixed maturities held to maturity     
U.S. Treasury and agency1,318
 1,347
 1,318
Foreign1,423
 1,485
 1,423
Corporate securities2,349
 2,468
 2,349
Mortgage-backed securities2,331
 2,396
 2,331
States, municipalities, and political subdivisions5,160
 5,309
 5,160
Total fixed maturities held to maturity12,581
 13,005
 12,581
Equity securities     
Industrial, miscellaneous, and all other812
 812
 812
Short-term investments4,291
 4,291
 4,291
Other investments (1)
5,915
 5,915
 5,915
Total investments - other than investments in related parties$106,179
 $109,511
 $109,087
(1)     Net of valuation allowance for expected credit losses.
(2)     Excludes $119 million of related party investments.

(1)

Excludes $147 million of related party investments.


F-104

F-108


SCHEDULE II
Chubb Limited and Subsidiaries


CONDENSED FINANCIAL INFORMATION OF REGISTRANT

BALANCE SHEETS (Parent Company Only)
December 31December 31
(in millions of U.S. dollars)20202019
Assets
Investments in subsidiaries and affiliates on equity basis$56,148 $50,853 
Total investments56,148 50,853 
Cash84 
Due from subsidiaries and affiliates, net3,522 4,776 
Other assets10 12 
Total assets$59,764 $55,643 
Liabilities
Accounts payable, accrued expenses, and other liabilities$323 $312 
Total liabilities323 312 
Shareholders' equity
Common Shares11,064 11,121 
Common Shares in treasury(3,644)(3,754)
Additional paid-in capital9,815 11,203 
Retained earnings39,337 36,142 
Accumulated other comprehensive income2,869 619 
Total shareholders' equity59,441 55,331 
Total liabilities and shareholders' equity$59,764 $55,643 
 December 31
 December 31
(in millions of U.S. dollars)2019
 2018
Assets   
Investments in subsidiaries and affiliates on equity basis$50,853
 $43,531
Total investments50,853
 43,531
Cash2
 1
Due from subsidiaries and affiliates, net4,776
 7,074
Other assets12
 3
Total assets$55,643
 $50,609
Liabilities   
Affiliated notional cash pooling programs (1)
$
 $35
Accounts payable, accrued expenses, and other liabilities312
 262
Total liabilities312
 297
Shareholders' equity   
Common Shares11,121
 11,121
Common Shares in treasury(3,754) (2,618)
Additional paid-in capital11,203
 12,557
Retained earnings36,142
 31,700
Accumulated other comprehensive income (loss)619
 (2,448)
Total shareholders' equity55,331
 50,312
Total liabilities and shareholders' equity$55,643
 $50,609
(1)
Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
The condensed financial information should be read in conjunction with the consolidated financial statementsConsolidated Financial Statements and notes thereto.



F-105
F-109


SCHEDULE II (continued)
Chubb Limited and Subsidiaries


CONDENSED FINANCIAL INFORMATION OF REGISTRANT

STATEMENTS OF OPERATIONS (Parent Company Only)
Year Ended December 31
(in millions of U.S. dollars)202020192018
Revenues
Investment income (1)
$155 $227 $305 
Equity in net income of subsidiaries and affiliates3,457 4,307 3,753 
3,612 4,534 4,058 
Expenses
Administrative and other (income) expense55 65 63 
Chubb integration expenses0 14 
Income tax expense24 14 19 
79 80 96 
Net income$3,533 $4,454 $3,962 
Comprehensive income$5,783 $7,521 $1,242 
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Revenues     
Investment income (1)
$227
 $305
 $336
Equity in net income of subsidiaries and affiliates4,307
 3,753
 3,640
 4,534
 4,058
 3,976
Expenses     
Administrative and other (income) expense65
 63
 63
Chubb integration expenses1
 14
 32
Income tax expense14
 19
 20
 80
 96
 115
Net income$4,454
 $3,962
 $3,861
Comprehensive income$7,521
 $1,242
 $4,718
(1)Includes net investment income, interest income, and net realized gains (losses).
The condensed financial information should be read in conjunction with the Consolidated Financial Statements and notes thereto.

(1)
STATEMENTS OF CASH FLOWS (Parent Company Only)
Year Ended December 31
(in millions of U.S. dollars)202020192018
Net cash flows from operating activities (1)
$1,933 $412 $256 
Cash flows from investing activities
Capital contribution(1,200)(1,000)(1,475)
Other(2)
Net cash flows used for investing activities(1,202)(1,000)(1,475)
Cash flows from financing activities
Dividends paid on Common Shares(1,388)(1,354)(1,337)
Common Shares repurchased(523)(327)
Advances from affiliates1,265 2,301 2,519 
Net proceeds from (payments to) affiliated notional cash pooling programs (2)
0 (35)35 
Net cash flows from (used for) financing activities(646)585 1,217 
Effect of foreign currency rate changes on cash and restricted cash(3)
Net increase (decrease) in cash and restricted cash82 (2)
Cash and restricted cash – beginning of year2 
Cash and restricted cash – end of year$84 $$
(1) Includes cash dividends received from subsidiaries of $2.0 billion, $200 million, and $75 million in 2020, 2019, and 2018, respectively.
(2) Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
Includes net investment income, interest income, and net realized gains (losses).
The condensed financial information should be read in conjunction with the consolidated financial statementsConsolidated Financial Statements and notes thereto.

STATEMENTS OF CASH FLOWS (Parent Company Only)
 Year Ended December 31 
(in millions of U.S. dollars)2019
 2018
 2017
Net cash flows from operating activities (1)
$412
 $256
 $781
Cash flows from investing activities     
Capital contribution(1,000) (1,475) 
Net cash flows used for investing activities(1,000) (1,475) 
Cash flows from financing activities     
Dividends paid on Common Shares(1,354) (1,337) (1,308)
Common Shares repurchased(327) 
 
Advances from affiliates2,301
 2,519
 892
Net proceeds from (payments to) affiliated notional cash pooling programs (2)
(35) 35
 (363)
Net cash flows from (used for) financing activities585
 1,217
 (779)
Effect of foreign currency rate changes on cash and restricted cash4
 
 
Net increase (decrease) in cash and restricted cash1
 (2) 2
Cash and restricted cash – beginning of year1
 3
 1
Cash and restricted cash – end of year$2
 $1
 $3

(1)
F-106
Includes cash dividends received from subsidiaries of $200 million, $75 million, and $450 million in 2019, 2018, and 2017, respectively.
(2)
Chubb maintains two notional multicurrency cash pools (Pools) with a third-party bank. Refer to Note 1 f) for additional information.
The condensed financial information should be read in conjunction with the consolidated financial statements and notes thereto.



F-110


SCHEDULE IV
Chubb Limited and Subsidiaries

SUPPLEMENTAL INFORMATION CONCERNING REINSURANCE
Premiums Earned
For the years ended December 31, 2020, 2019, and 2018 (in millions of U.S. dollars, except for percentages)Direct AmountCeded To Other CompaniesAssumed From Other CompaniesNet AmountPercentage of Amount Assumed to Net
2020
Property and Casualty$31,546 $6,782 $3,044 $27,808 11 %
Accident and Health4,249 368 111 3,992 3 %
Life1,242 93 168 1,317 13 %
Total$37,037 $7,243 $3,323 $33,117 10 %
2019
Property and Casualty$30,339 $7,236 $2,797 $25,900 11 %
Accident and Health4,546 376 119 4,289 %
Life991 81 191 1,101 17 %
Total$35,876 $7,693 $3,107 $31,290 10 %
2018
Property and Casualty$28,793 $6,792 $2,812 $24,813 11 %
Accident and Health4,409 342 162 4,229 %
Life906 85 201 1,022 20 %
Total$34,108 $7,219 $3,175 $30,064 11 %
Premiums Earned       
For the years ended December 31, 2019, 2018, and 2017 (in millions of U.S. dollars, except for percentages) Direct Amount
 Ceded To Other Companies
 Assumed From Other Companies
 Net Amount
 Percentage of Amount Assumed to Net
2019         

Property and Casualty $30,339
 $7,236
 $2,797
 $25,900
 11%
Accident and Health 4,546
 376
 119
 4,289
 3%
Life 991
 81
 191
 1,101
 17%
Total $35,876
 $7,693
 $3,107
 $31,290
 10%
2018          
Property and Casualty $28,793
 $6,792
 $2,812
 $24,813
 11%
Accident and Health 4,409
 342
 162
 4,229
 4%
Life 906
 85
 201
 1,022
 20%
Total $34,108
 $7,219
 $3,175
 $30,064
 11%
2017          
Property and Casualty $27,774
 $6,650
 $2,891
 $24,015
 12%
Accident and Health 4,167
 349
 221
 4,039
 5%
Life 841
 81
 220
 980
 22%
Total $32,782
 $7,080
 $3,332
 $29,034
 11%



F-107


F-111


SCHEDULE VI
Chubb Limited and Subsidiaries

SUPPLEMENTARY INFORMATION CONCERNING PROPERTY AND CASUALTY OPERATIONS
As of and for the years ended December 31, 2020, 2019, and 2018 (in millions of U.S. dollars)
Deferred Policy Acquisition CostsNet Reserves for Unpaid Losses and Loss ExpensesUnearned PremiumsNet Premiums EarnedNet Investment IncomeNet Losses and Loss Expenses Incurred Related toAmortization of Deferred Policy Acquisition CostsNet Paid Losses and Loss ExpensesNet Premiums Written
Current YearPrior Year
2020$4,244 $53,164 $17,652 $31,800 $3,074 $22,124 $(414)$6,076 $17,434 $32,471 
2019$4,161 $48,509 $16,771 $30,189 $3,141 $19,575 $(845)$5,831 $18,473 $31,126 
2018$3,926 $48,271 $15,532 $29,042 $3,047 $19,048 $(981)$5,630 $18,340 $29,505 
As of and for the years ended December 31, 2019, 2018, and 2017 (in millions of U.S. dollars)      
  Deferred Policy Acquisition Costs  Net Reserves for Unpaid Losses and Loss Expenses
 Unearned Premiums
 Net Premiums Earned
 Net Investment Income
Net Losses and Loss Expenses Incurred Related to  Amortization of Deferred Policy Acquisition Costs
 Net Paid Losses and Loss Expenses
 Net Premiums Written
       Current Year
 Prior Year
   
2019 $4,161  $48,509
 $16,771
 $30,189
 $3,141
 $19,575
 $(845) $5,831
 $18,473
 $31,126
2018 $3,926  $48,271
 $15,532
 $29,042
 $3,047
 $19,048
 $(981) $5,630
 $18,340
 $29,505
2017 $3,805  $49,165
 $15,216
 $28,054
 $2,890
 $19,391
 $(937) $5,519
 $17,448
 $28,225




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