Significant Accounting (Policies)	12 Months Ended
Dec. 31, 2023
Accounting Policies [Abstract]
Basis of Presentation	The Hartford Financial Services Group, Inc. ("HFSG") is a holding company for insurance and financial services subsidiaries that provide property and casualty ("P&C") insurance, group life and disability products and mutual funds and exchange-traded funds ("ETF") to individual and business customers in the United States as well as in the United Kingdom and other international locations (collectively, “The Hartford”, the “Company”, “we” or “our”). On December 29, 2021, the Company completed the sale of all of Navigators Holdings (Europe) N.V., a Belgium holding company, and its subsidiaries, Bracht, Deckers & Mackelbert N.V. and Assurances Contintales Contintale Verzekeringen N.V., collectively referred to as "Continental Europe Operations". For further discussion of this transaction, see Note 22 - Business Dispositions. The Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. Generally Accepted Accounting Principles”) which differ materially from the accounting practices prescribed by various insurance regulatory authorities.
Consolidation	Consolidation The Consolidated Financial Statements include the accounts of The Hartford Financial Services Group, Inc., and entities in which the Company directly or indirectly has a controlling financial interest. Entities in which the Company has significant influence over the operating and financing decisions but does not control are reported using the equity method. Intercompany transactions and balances between The Hartford and its subsidiaries and affiliates have been eliminated.
Use of Estimates	Use of Estimates The preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the 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. Actual results could differ from those estimates. The most significant estimates include those used in determining property and casualty and group long-term disability ("LTD") insurance product reserves, net of reinsurance; evaluation of goodwill for impairment; valuation of investments and derivative instruments; and contingencies relating to corporate litigation and regulatory matters.
Reclassifications	Reclassifications Certain reclassifications have been made to prior year financial information to conform to the current year presentation.
Adoption of New Accounting Standards	Future Adoption of New Accounting Standards Segment Disclosures The FASB issued new guidance on Segment Reporting that requires enhanced disclosures on an annual and quarterly basis about significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within the reported measure of segment profit or loss. The new guidance also requires disclosure of the title and position of the CODM as well as a description of how the reported measure of profit or loss is used to assess segment performance and allocate resources. The Company is required to provide the new disclosures beginning with the December 31, 2024 consolidated financial statements and on a quarterly basis beginning with the March 31, 2025 interim condensed consolidated financial statements. The new guidance will be applied on a retrospective basis for all periods presented. The Company is evaluating the disclosure impact of the new guidance; however, the new guidance will not have an impact on the consolidated financial position, results of operations, or cash flows. Income Tax Disclosures The FASB issued new disclosure requirements for income taxes primarily for the income tax rate reconciliation and income taxes paid. The income tax rate reconciliation within the income taxes note will present reconciling items based on specified categories with further disaggregation of items above a prescribed threshold. Disclosure of income taxes paid (net of refunds received) in the consolidated statement of cash flows will be disaggregated by federal (national), state, and foreign taxes with further disaggregation by individual jurisdictions subject to a prescribed threshold. The Company is required to provide the new disclosure annually beginning with the December 31, 2025 consolidated financial statements. Disclosures are required to be provided on a prospective basis. Early adoption in an annual period and retrospective application is permitted. The Company is evaluating the disclosure impact of the new guidance; however, the new guidance will not have an impact on the consolidated financial position, results of operations, or cash flows.
Description of New Accounting Pronouncements Not yet Adopted [Text Block]	Adoption of New Accounting Standards Reference Rate Reform On March 12, 2020, the Company adopted the Financial Accounting Standard Board's ("FASB") temporary guidance, which allows The Hartford to account for contract modifications made solely due to rate reform (such as replacing London Inter-Bank Offered Rate ("LIBOR") with another reference rate) as continuations of existing contracts and to maintain hedge accounting when the hedging effectiveness between a financial instrument and its hedge is only affected by the change to a replacement rate. As a result, The Hartford did not recognize gains and losses during the transition period of LIBOR to an alternative reference rate that would otherwise have arisen from accounting assessments and remeasurements. On December 21, 2022, the FASB extended the effective date for the temporary guidance and the temporary guidance now expires for contract modifications made and hedge relationships entered into or evaluated after December 31, 2024. The Company is not required to measure the effect of adoption on its financial position, cash flows or net income because the guidance provides relief from accounting for the effects of the change to a replacement rate. Reserve for Future Policy Benefits On January 1, 2023, the Company adopted the FASB’s updated guidance on accounting for long duration insurance contracts, which was applied on a modified retrospective basis as of January 1, 2021. The new guidance requires the discount rate assumption to be updated, as of the transition date and quarterly going forward, to a current upper-medium grade fixed-income investment yield, which has been interpreted to represent a yield based on single-A credit rated fixed maturity instruments with similar duration to the liability. The new guidance also eliminated the requirement to adjust the reserve for future policy benefits for unrealized gains and losses on fixed maturity investments as if those unrealized gains and losses were realized (referred to as shadow reserves). The change in the reserve estimate resulting from updating the discount rate assumptions and eliminating shadow reserves was recognized as a net cumulative effect adjustment that increased the reserve for future policy benefits by $85 and decreased AOCI by $65, net of deferred tax effects, as of January 1, 2021. The new guidance also requires that underlying cash flow assumptions (i.e., mortality, lapse and expense) in the reserve for future policy benefits be based on best estimate assumptions. The adjustments to the reserve for future policy benefits at adoption resulted in establishing a deferred profit liability on limited pay contracts of $18 representing the estimated profits based on best estimate cash flow assumptions.
Revenue Recognition	Revenue Recognition Premium Revenue from Direct Insurance and Assumed Reinsurance Property and casualty premiums are earned on a pro rata basis over the policy period and include accruals for policies that have been written by agents but not yet reported to us, as well as ultimate premium revenue anticipated under auditable and retrospectively rated policies. We estimate the amount of premium not yet reported based on current and historical trends of the business being written. Such estimates are regularly reviewed and updated and any resulting adjustments are included in the current year's results. Unearned premiums represent the premiums applicable to the unexpired terms of policies in force, or period of risk. Group life, disability and accident premiums are generally due from policyholders and recognized as revenue on a pro rata basis over the period of the contracts. An estimated ACL is recorded on the basis of periodic evaluations of balances due from insureds and considering historical credit loss information, adjusted for current economic conditions as well as reasonable and supportable forecasts when appropriate. The Company records total credit loss expenses related to premiums receivable in insurance operating costs and other expenses. Write-offs of premiums receivable and agents' balances and any related ACL are recorded in the period in which the balance is deemed uncollectible. Refer to Note 7 - Premiums Receivable and Agents' Balances for further discussion regarding the allowance for doubtful accounts included in premiums receivable and agents’ balances. Non-Insurance Revenue from Contracts with Customers Installment fees are charged on property and casualty insurance contracts for billing the insurance customer in installments over the policy term. These fees are recognized in fee income as earned on collection. Insurance servicing revenues within Personal Lines consist of up-front commissions earned for collecting premiums and processing claims on insurance policies for which The Hartford does not assume underwriting risk, predominantly related to the National Flood Insurance Plan program. These insurance servicing revenues are recognized in other revenues over the period of the flood program's policy terms. Group Benefits earns fee income from employers for the administration of underwriting, implementation and claims processing for employer self-funded plans and for leave management services. Fees are recognized as services are provided and collected monthly. Hartford Funds provides investment management, administrative and distribution services to mutual funds and exchange-traded funds. The Company assesses investment advisory, distribution and other asset management fees primarily based on the average daily net asset values from mutual funds and exchange-traded funds, which are recorded in the period in which the services are provided and are collected monthly. Fluctuations in domestic and international markets and related investment performance, volume and mix of sales and redemptions of mutual funds or exchange-traded funds, and other changes to the composition of assets under management ("AUM") are all factors that ultimately have a direct effect on fee income earned. Corporate investment management and other fees are primarily for managing third party invested assets, including management of a portion of the invested assets of The Hartford’s former life and annuity business. These fees, calculated based on the average quarterly net asset values, are recorded in the period in which the services are provided and are collected quarterly. Fluctuations in markets and interest rates and other changes to the composition of assets under management are all factors that ultimately have a direct effect on fee income earned.
Dividends to Policyholders	Dividends to Policyholders Policyholder dividends are paid to certain property and casualty policyholders. Policies that receive dividends are referred to as participating policies. Participating dividends to policyholders are accrued and reported in insurance operating costs and other expenses and other liabilities using an estimate of the amount to be paid based on underlying contractual obligations under policies and applicable state laws. Net written premiums for participating property and casualty insurance policies represented 6%, 7%, and 7% of total net written premiums for each of the years ended December 31, 2023, 2022 and 2021, respectively. Participating dividends to property and casualty policyholders were $39, $29 and $24 for the years ended December 31, 2023, 2022 and 2021, respectively. There were no additional amounts of income allocated to participating policyholders.
Investments	Investments Overview The Company’s investments in fixed maturities consist of bonds, including structured securities, and redeemable preferred stock. Most of these investments are classified as AFS and are carried at fair value. The after tax difference between fair value and cost or amortized cost is reflected in stockholders’ equity as a component of AOCI. Fixed maturities for which the Company elected the fair value option are classified as FVO and are carried at fair value with changes in value recorded in net realized gains and losses. These investments represent certain investments in residual interests of securitizations and other securities that contain embedded credit derivatives. Equity securities are measured at fair value with any changes in valuation reported in net realized gains and losses. Mortgage loans are recorded at the outstanding principal balance adjusted for amortization of premiums or discounts and net of an ACL. Short-term investments are carried at amortized cost, which approximates fair value. Limited partnerships and other alternative investments are reported at their carrying value and are primarily accounted for under the equity method with the Company’s share of earnings included in net investment income. Recognition of income related to limited partnerships and other alternative investments is delayed due to the availability of the related financial information, as private equity and other funds are generally received on a three-month delay. Accordingly, income for the years ended December 31, 2023, 2022, and 2021 may not include the full impact of current year changes in valuation of the underlying assets and liabilities of the funds, which are generally obtained from the limited partnerships. Other investments primarily consist of equity fund investments, overseas deposits which are measured at fair value using the net asset value as a practical expedient, consolidated investment funds for which the Company has provided seed money and reports the underlying investments at fair value with changes in the fair value recognized in income consistent with accounting requirements for investment companies, and derivative instruments which are carried at fair value. Net Realized Gains and Losses Net realized gains and losses from investment sales are reported as a component of revenues and are determined on a specific identification basis. Net realized gains and losses also result from fair value changes in equity securities, fixed maturities, FVO, and derivatives contracts that do not qualify, or are not designated, as a hedge for accounting purposes. The Company records net credit losses on fixed maturities, AFS and changes in the ACL on mortgage loans as a component of net realized gains and losses. Future changes in the ACL resulting from improvements in expected future cash flows are recorded through net realized gains and losses. Net Investment Income Interest income from fixed maturities and mortgage loans is recognized when earned on the constant effective yield method based on the estimated timing of cash flows. Most premiums and discounts on fixed maturities are amortized to the maturity date. Premiums on callable bonds may be amortized to call dates based on call prices. For structured financial assets subject to prepayment risk, yields are recalculated and adjusted periodically to reflect historical and/or estimated future prepayments using the retrospective method. For certain other structured securities, including securities that previously had an ACL and interest only securities, any yield adjustments are made using the prospective method. Prepayment fees and make-whole payments on fixed maturities and mortgage loans are recorded in net investment income when earned. For equity securities, dividends are recognized as investment income on the ex-dividend date. Limited partnerships and other alternative investments primarily use the equity method of accounting to recognize the Company’s share of earnings. For fixed maturities with an ACL, net investment income is recognized at the original effective rate and accretion of the ACL is recognized through net realized gains and losses. The Company’s non-income producing investments were not material for the years ended December 31, 2023, 2022 and 2021. Accrued Investment Income Accrued investment income primarily includes accruals of interest and dividend income from investments that have been earned but not yet received.
Derivatives	Derivative Instruments Overview The Company utilizes a variety of over-the-counter ("OTC") derivatives, derivatives cleared through central clearing houses ("OTC-cleared") and exchange traded derivative instruments as part of its overall risk management strategy as well as to engage in income generation covered call transactions and replication transactions. The types of instruments may include swaps, caps, floors, forwards, futures and options to achieve the following Company-approved objectives: •to hedge risk arising from interest rate, equity market, commodity market, credit spread and issuer default, price or currency exchange rates or volatility; •to manage liquidity; •to control transaction costs; •to enter into income generation covered call transactions and synthetic replication transactions. Interest rate and credit default swaps involve the periodic exchange of cash flows with other parties, at specified intervals, calculated using agreed upon rates or other financial variables and notional principal amounts. Generally, little to no cash or principal payments are exchanged at the inception of the contract. Typically, at the time a swap is entered into, the cash flow streams exchanged by the counterparties are equal in value. The Company clears certain interest rate swap and credit default swap derivative transactions through central clearing houses. OTC-cleared derivatives require initial collateral at the inception of the trade in the form of cash or highly liquid securities, such as U.S. Treasuries and government agency investments. Central clearing houses also require additional cash as variation margin based on daily market value movements. For information on collateral, see the Derivative Collateral Arrangements section in Note 6 - Derivatives. In addition, OTC-cleared transactions include price alignment amounts either received or paid on the variation margin, which is characterized as interest and reflected in net investment income. Forward contracts are customized commitments that specify a rate of interest or currency exchange rate to be paid or received on an obligation beginning on a future start date and are typically settled in cash. Financial futures are standardized commitments to either purchase or sell designated financial instruments, at a future date, for a specified price and may be settled in cash or through delivery of the underlying instrument. Futures contracts trade on organized exchanges. Margin requirements for futures are met by pledging securities or cash, and changes in the futures’ contract values are settled daily in cash. Option contracts grant the purchaser, for a premium payment, the right to either purchase from or sell to the issuer a financial instrument at a specified price, within a specified period or on a stated date. The contracts may reference commodities, which grant the purchaser the right to either purchase from or sell to the issuer commodities at a specified price, within a specified period or on a stated date. Option contracts are typically settled in cash. Foreign currency swaps exchange an initial principal amount in two currencies, agreeing to re-exchange the currencies at a future date, at an agreed upon exchange rate. There may also be a periodic exchange of payments at specified intervals calculated using the agreed upon rates and exchanged principal amounts. The Company’s derivative transactions conducted in insurance company subsidiaries are used in strategies permitted under the derivative use plans required by the State of Connecticut, the State of Illinois and the State of New York insurance regulators. Accounting and Financial Statement Presentation of Derivative Instruments and Hedging Activities Derivative instruments are recognized on the Consolidated Balance Sheets at fair value and are reported in Other Investments and Other Liabilities. For balance sheet presentation purposes, the Company has elected to offset the fair value amounts, income accruals, and related cash collateral receivables and payables of OTC derivative instruments executed in a legal entity and with the same counterparty or under a master netting agreement, which provides the Company with the legal right of offset. On the date the derivative contract is entered into, the Company designates the derivative as (1) a hedge of the fair value of a recognized asset or liability (“fair value” hedge), (2) a hedge of the variability in cash flows of a forecasted transaction or of amounts to be received or paid related to a recognized asset or liability (“cash flow” hedge), (3) a hedge of a net investment in a foreign operation (“net investment” hedge) or (4) held for other investment and/or risk management purposes, which primarily involve managing asset or liability related risks and do not qualify for hedge accounting. The Company currently does not designate any derivatives as fair value or net investment hedges. Cash Flow Hedges - Changes in the fair value of a derivative that is designated and qualifies as a cash flow hedge, including foreign-currency cash flow hedges, are recorded in AOCI and are reclassified into earnings when the variability of the cash flow of the hedged item impacts earnings. Gains and losses on derivative contracts that are reclassified from AOCI to current period earnings are included in the line item in the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Periodic derivative net coupon settlements are recorded in the line item of the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Cash flows from cash flow hedges are presented in the same category as the cash flows from the items being hedged in the Consolidated Statement of Cash Flows. Other Investment and/or Risk Management Activities - The Company’s other investment and/or risk management activities primarily relate to strategies used to reduce economic risk or replicate permitted investments and do not receive hedge accounting treatment. Changes in the fair value, including periodic derivative net coupon settlements, of derivative instruments held for other investment and/or risk management purposes are reported in current period earnings as net realized gains and losses. Hedge Documentation and Effectiveness Testing To qualify for hedge accounting treatment, a derivative must be highly effective in mitigating the designated changes in fair value or cash flows of the hedged item. At hedge inception, the Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking each hedge transaction. The documentation process includes linking derivatives that are designated as fair value, cash flow, or net investment hedges to specific assets or liabilities on the balance sheet or to specific forecasted transactions and defining the effectiveness testing methods to be used. The Company also formally assesses both at the hedge’s inception and ongoing on a quarterly basis, whether the derivatives that are used in hedging transactions have been and are expected to continue to be highly effective in offsetting changes in fair values, cash flows or net investment in foreign operations of hedged items. Hedge effectiveness is assessed primarily using quantitative methods as well as using qualitative methods. Quantitative methods include regression or other statistical analysis of changes in fair value or cash flows associated with the hedge relationship. Qualitative methods may include comparison of critical terms of the derivative to the hedged item. Discontinuance of Hedge Accounting The Company discontinues hedge accounting prospectively when (1) it is determined that the qualifying criteria are no longer met; (2) the derivative is no longer designated as a hedging instrument; or (3) the derivative expires or is sold, terminated or exercised. When cash flow hedge accounting is discontinued because the Company becomes aware that it is not probable that the forecasted transaction will occur, the derivative continues to be carried on the balance sheet at its fair value, and gains and losses that were accumulated in AOCI are recognized immediately in earnings. In other situations in which hedge accounting is discontinued, including those where the derivative is sold, terminated or exercised, amounts previously deferred in AOCI are reclassified into earnings when earnings are impacted by the hedged item. Embedded Derivatives The Company may purchase investments that contain embedded derivative instruments. When it is determined that (1) the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and (2) a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is bifurcated from the host for measurement purposes. The embedded derivative, which is reported with the host instrument in the Consolidated Balance Sheets, is carried at fair value with changes in fair value reported in net realized gains and losses. Credit Risk of Derivative Instruments Credit risk is defined as the risk of financial loss due to uncertainty of an obligor’s or counterparty’s ability or willingness to meet its obligations in accordance with agreed upon terms. Credit exposures are measured using the market value of the derivatives, resulting in amounts owed to the Company by its counterparties or potential payment obligations from the Company to its counterparties. The Company generally requires that OTC derivative contracts, other than certain forward contracts, be governed by International Swaps and Derivatives Association agreements which are structured by legal entity and by counterparty, and permit right of offset. Some agreements require daily collateral settlement based upon agreed upon thresholds. For purposes of daily derivative collateral maintenance, credit exposures are generally quantified based on the prior business day’s market value and collateral is pledged to and held by, or on behalf of, the Company to the extent the current value of the derivatives is greater than zero, subject to minimum transfer thresholds, if applicable. The Company also minimizes the credit risk of derivative instruments by entering into transactions with high quality counterparties primarily rated A or better, which are monitored and evaluated by the Company’s risk management team and reviewed by senior management. OTC-cleared derivatives are governed by clearing house rules. Transactions cleared through a central clearing house reduce risk due to their ability to require daily variation margin and act as an independent valuation source. In addition, the Company monitors counterparty credit exposure on a monthly basis to ensure compliance with Company policies and statutory limitations. For reporting purposes, the Company has elected to offset within assets or liabilities based upon the net of the fair value amounts, income accruals, and related cash collateral receivables and payables of OTC derivative instruments executed in a legal entity and with the same counterparty under a master netting agreement, which provides the Company with the legal right of offset.
Cash	Cash and Restricted Cash Cash represents cash on hand and demand deposits with banks or other financial institutions. Restrictions on cash primarily relate to funds that are held to support regulatory and contractual obligations.
Reinsurance	Reinsurance The Company cedes insurance to affiliated and unaffiliated insurers in order to limit its maximum losses and to diversify its exposures and provide statutory surplus relief. Such arrangements do not relieve the Company of its primary liability to policyholders. Failure of reinsurers to honor their obligations could result in losses to the Company. The Company also assumes reinsurance from other insurers and is a member of and participates in reinsurance pools and associations. Assumed reinsurance refers to the Company’s acceptance of certain insurance risks that other insurance companies or pools have underwritten. Reinsurance accounting is followed for ceded and assumed transactions that provide indemnification against loss or liability relating to insurance risk (i.e., risk transfer). To meet risk transfer requirements, a reinsurance agreement must include insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss to the reinsurer. If the ceded and assumed transactions do not meet risk transfer requirements, the Company accounts for these transactions as deposit transactions. The Company had no deposit liability as of December 31, 2023 and 2022, reported in other liabilities. Premiums, benefits, losses and loss adjustment expenses reflect the net effects of ceded and assumed reinsurance transactions. Included in other assets are prepaid reinsurance premiums, which represent the portion of premiums ceded to reinsurers applicable to the unexpired terms of the reinsurance contracts. Reinsurance recoverables are balances due from reinsurers for ceded paid and unpaid losses and loss adjustment expenses and are presented net of an allowance for uncollectible reinsurance. Changes in the allowance for uncollectible reinsurance are reported in benefits, losses and loss adjustment expenses in the Company's Consolidated Statements of Operations. The Company periodically evaluates the recoverability of its reinsurance recoverable assets and establishes an allowance for uncollectible reinsurance. The allowance for uncollectible reinsurance reflects management’s best estimate of reinsurance cessions that may be uncollectible in the future due to reinsurers’ unwillingness or inability to pay. The allowance for uncollectible reinsurance comprises an ACL and an allowance for disputed balances. Based on this analysis, the Company may adjust the allowance for uncollectible reinsurance or charge off reinsurer balances that are determined to be uncollectible. The Company records credit losses related to reinsurance recoverables in benefits, losses and loss adjustment expenses. Write-offs of reinsurance recoverables and any related ACL are recorded in the period in which the balance is deemed uncollectible. Expected recoveries are included in the estimate of the ACL. Retroactive reinsurance agreements, including adverse development covers ("ADC"), are reinsurance agreements under which our reinsurer agrees to reimburse us as a result of loss development related to past insurable events. For these agreements, the consideration paid in excess of the estimated ultimate losses to be recovered under the agreement at inception is recognized as a loss on reinsurance transaction. The benefit of subsequent adverse development ceded up to the total consideration paid is recognized as ceded losses, which are a reduction of incurred losses and loss adjustment expenses. The excess of the estimated amounts ultimately to be recovered under the agreement over the consideration paid is recognized as a deferred gain liability and amortized into income over the period the ceded losses are recovered in cash from the reinsurer. The amount of the deferred gain liability is recalculated each period based on cumulative recoveries not yet collected relative to the latest estimate of ultimate losses to be recovered. Ceded loss reserves under retroactive agreements were $1.7 billion and $1.5 billion, and the deferred gain liability reported in other liabilities was $997 and $803, as of December 31, 2023 and 2022, respectively. In any given period, the change in deferred gain included in net income includes amortization of the deferred gain based on the percentage of ultimate ceded losses collected plus any change in the deferred gain liability due to changes in the estimated ultimate losses to be recovered. The effect on income from change in the deferred gain was a charge to earnings of $194, $229 and $246 before tax for the years ended December 31, 2023, 2022, and 2021 respectively.
Deferred Policy Acquisition Costs	Deferred Policy Acquisition Costs DAC represents costs that are directly related to the acquisition of new and renewal insurance contracts and incremental direct costs of contract acquisition that are incurred in transactions with independent third parties or in compensation to employees. Such costs primarily include commissions, premium taxes, costs and certain other expenses that are directly related to successfully issued contracts, including a portion of policy issuance and underwriting costs. For P&C insurance products and group life, disability and accident contracts, costs are deferred and amortized ratably over the period the related premiums are earned. Deferred acquisition costs are reviewed to determine if they are recoverable from future income, and if not, are charged to expense. Anticipated investment income is considered in the determination of the recoverability of DAC.
Income Taxes	Income Taxes The Company recognizes taxes payable or refundable for the current year and deferred taxes for the tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years the temporary differences are expected to reverse. A deferred tax provision is recorded for the tax effects of temporary differences between the Company's current taxable income and its income before tax under generally accepted accounting principles in the Consolidated Statements of Operations. For deferred tax assets, the Company records a valuation allowance that is adequate to reduce the total deferred tax asset to an amount that will more likely than not be realized.
Goodwill and Intangible Assets	Goodwill Goodwill represents the excess of the cost to acquire a business over the acquisition date fair value of net assets acquired. Goodwill is not amortized but is reviewed for impairment at least annually or more frequently if events occur or circumstances change that would indicate that a triggering event for a potential impairment has occurred. Goodwill is tested for impairment by comparing the fair value of a reporting unit to its carrying value. Goodwill is impaired up to the amount that the carrying value of the reporting unit exceeds the fair value. A reporting unit is defined as an operating segment or one level below an operating segment. The Company’s reporting units, for which goodwill has been allocated consist of Commercial Lines, Personal Lines, Group Benefits, and Hartford Funds. Management’s determination of the fair value of each reporting unit incorporates multiple inputs into discounted cash flow calculations, including assumptions that market participants would make in valuing the reporting unit. Assumptions include levels of economic capital required to support the business, future business growth, earnings projections, the weighted average cost of capital used for purposes of discounting and, for the Hartford Funds segment, assets under management. Decreases in business growth, decreases in earnings projections and increases in the weighted average cost of capital will all cause a reporting unit’s fair value to decrease, increasing the possibility of impairments. Intangible Assets Acquired intangible assets on the Consolidated Balance Sheets include purchased customer relationship and agency or other distribution rights and licenses measured at fair value at acquisition. The Company amortizes finite-lived other intangible assets over their useful lives generally on a straight-line basis over the period of expected benefit, ranging from 1 to 15 years. Management revises amortization periods if it believes there has been a change in the length of time that an intangible asset will continue to have value. Indefinite-lived intangible assets are not subject to amortization. Intangible assets are assessed for impairment generally when events or circumstances indicate a potential impairment and at least annually for indefinite-lived intangibles. Finite-lived intangible assets are impaired if the carrying amount is not recoverable from undiscounted cash flows. Indefinite-lived intangible assets are impaired if the carrying amount exceeds fair value. Impaired intangible assets are written down to fair value.
Property and Equipment	Property and Equipment Property and equipment, which includes capitalized software and right-of-use lease assets, is carried at cost net of accumulated depreciation. Depreciation is based on the estimated useful lives of the various classes of property and equipment and is recognized principally on the straight-line method. Accumulated depreciation was $2.4 billion and $2.3 billion as of December 31, 2023 and 2022, respectively. Depreciation expense was $204, $213, and $282 for the years ended December 31, 2023, 2022 and 2021, respectively, and is reported in insurance operating costs and other expenses. The costs to access and develop hosted software arrangements, where The Hartford has the right to access and use the software, but not take possession, and the cost of certain software licenses are reported in other assets on a straight-line basis over the service period. Amortization of hosted software and certain software licenses was $85, $78, and $60 for the years ended December 31, 2023, 2022, and 2021, respectively, and is reported in insurance operating costs and other expenses. Leases Leases are classified as financing or operating leases. Where the lease is economically similar to a purchase because The Hartford obtains control of the underlying asset, the lease is classified as a financing lease and the Company recognizes amortization of the right of use asset and interest expense on the liability. Where the lease is not economically similar to a purchase as the lease provides The Hartford with only the right to control the use of the underlying asset over the lease term and the lease term is greater than one year, the lease is an operating lease and the lease cost is recognized as rental expense over the lease term on a straight-line basis. Leases with a term of one year or less are also expensed over the lease term but not recognized on the Consolidated Balance Sheets.
Unpaid Policy Claims and Claims Adjustment Expenses	Unpaid Losses and Loss Adjustment Expenses For property and casualty and group life, disability and accident insurance and assumed reinsurance products, the Company establishes reserves for unpaid losses and loss adjustment expenses to provide for the estimated costs of paying claims under insurance policies written by the Company. These reserves include estimates for both claims that have been reported and those that have not yet been reported, and include estimates of all losses and loss adjustment expenses associated with processing and settling these claims. Estimating the ultimate cost of future losses and loss adjustment expenses is an uncertain and complex process. This estimation process is based significantly on the assumption that past developments are an appropriate predictor of future events, and involves a variety of actuarial techniques that analyze experience, trends and other relevant factors. The effects of inflation are implicitly considered in the reserving process. In addition, a number of complex factors influence the uncertainties involved with the reserving process including social and economic trends and changes in the concepts of legal liability and damage awards. Accordingly, final claim settlements may vary from the present estimates, particularly when those payments may not occur until well into the future. The Company regularly reviews the adequacy of its estimated losses and loss adjustment expense reserves by reserve line within the various reporting segments. Adjustments to previously established reserves are reflected in the operating results of the period in which the adjustment is determined to be necessary. Such adjustments could possibly be significant, reflecting any variety of new and adverse or favorable trends. Most of the Company’s property and casualty insurance products reserves are not discounted. However, the Company has discounted to present value certain reserves for indemnity payments that are due to claimants under workers’ compensation policies because the payment pattern and the ultimate costs are reasonably fixed and determinable on an individual claim basis. The discount rate is based on the risk free rate for the expected claim duration as determined in the year the claims were incurred. The Company also has discounted liabilities for structured settlement agreements that provide fixed periodic payments to claimants. These structured settlements include annuities purchased to fund unpaid losses for permanently disabled claimants. These structured settlement liabilities are discounted to present value using the rate implicit in the purchased annuities and the purchased annuities are accounted for within reinsurance recoverables. Group life and disability contracts with long-tail claim liabilities are discounted because the payment pattern and the ultimate costs are reasonably fixed and determinable on an individual claim basis. The discount rates are estimated based on investment yields expected to be earned on the cash flows net of investment expenses and expected credit losses. The Company establishes discount rates for these reserves in the year the claims are incurred (the incurral year) which is when the estimated settlement pattern is determined. The discount rate for life and disability reserves acquired from Aetna's U.S. group life and disability business were based on interest rates in effect at the acquisition date of November 1, 2017. For further information about how unpaid losses and loss adjustment expenses are established, see Note 11 - Reserve for Unpaid Losses and Loss Adjustment Expenses.
Liability for Future Policy Benefit	Reserve for Future Policy Benefits The Company’s reserves for future policy benefits includes paid-up life insurance and whole-life policies resulting from conversion from group life policies included within the Group Benefits segment and reserves for run-off structured settlement and terminal funding agreement liabilities, which are reported in the Corporate category. Contracts are grouped into cohorts by contract type and issue year. The Company establishes reserves for future policy benefits using the net premium approach, which represents the present value of future policyholder benefits and related expenses less the present value of future net premiums. Net premiums are calculated by multiplying gross premiums for the contracts in a specific cohort by a net premium ratio. The net premium ratio is determined for the lifetime of a given cohort as the present value of net benefits divided by the present value of gross premiums. Related expenses include termination and settlement costs and exclude acquisition costs and non-claim related costs, such as costs relating to investments, general administration, policy maintenance, product development, market research and general overhead or any other costs, which are expensed as incurred. The Company estimates premiums, benefits and related expense cash flows using methods that include assumptions, such as estimates of mortality, lapse, and claim-related expenses, and the possible impact of inflation on those expenses. Benefits include all guaranteed cash flows to be paid to the policyholder. The reserve for future policy benefits is adjusted for differences between actual and expected experience. Each quarter, the Company updates its estimates of cash flows expected over the life of a group of contracts using actual historical experience. These updated cash flows are used to calculate the revised net premiums and net premium ratio, which are used to derive an updated reserve for future policy benefits. In subsequent periods, the revised net premiums are used to measure the reserve for future policy benefits, subject to future revisions. Future cash flow assumptions, including mortality, lapse and expense are reviewed and, if a change is indicated, updated at least annually in the third quarter. The difference between the newly calculated reserve balance and the reserve balance before updating for actual experience and/or future cash flow assumptions is the remeasurement gain or loss, which is immaterial for each of the years ended December 31, 2023, 2022 and 2021 is presented in benefits losses and loss adjustments expense in the Consolidated Statements of Operations. Changes to the reserve due to updates to cash flow assumptions discounted at the discount rate used immediately prior to transition are recognized on a catch-up basis in the Consolidated Statement of Operations. The discount rate assumption is an equivalent single rate that is based on a current market observable, upper-medium grade fixed maturity yield. This has been interpreted to represent a yield based on single-A credit rated fixed maturity instruments with similar duration to the liability. The Company uses the yield of a market observable index of single-A credit rated fixed maturities as the basis for setting the discount rate. The discount rate assumption is updated quarterly and the change in the reserve estimate resulting from updating the discount rate assumption is recognized in other comprehensive income.
TreasuryStockPolicy	Treasury Stock Treasury stock is the cost of common stock repurchased, which includes the purchase price of shares acquired and direct costs to acquire shares, including commissions and excise taxes. Issuance and retirement of treasury stock is recognized at the average cost of shares held in treasury.
Foreign Currency	Foreign Currency Foreign currency translation gains and losses are reflected in stockholders’ equity as a component of AOCI. The Company’s foreign subsidiaries’ balance sheet accounts are translated at the exchange rates in effect at each year end and income statement accounts are translated at the average rates of exchange prevailing during the year. The national currencies of the international operations are generally their functional currencies; however, the U.S. dollar is the functional currency of Lloyd's Syndicate 1221 ("Lloyd's Syndicate"), for which the Company is the sole corporate member. Gains and losses resulting from the remeasurement of foreign currency transactions are reflected in earnings in net realized gains (losses) in the period in which they occur.
Derivatives, Methods of Accounting, Hedge Documentation	Strategies that Qualify for Hedge Accounting Some of the Company's derivatives satisfy hedge accounting requirements as outlined in Note 1 - Basis of Presentation and Significant Accounting Policies. Typically, these hedging instruments include interest rate swaps and, to a lesser extent, foreign currency swaps where the terms or expected cash flows of the hedged item closely match the terms of the swap. The interest rate swaps are typically used to manage interest rate duration of certain fixed maturity securities or debt instruments issued. Cash Flow Hedges Interest rate swaps are predominantly used to manage portfolio duration and better match cash receipts from assets with cash disbursements required to fund liabilities. These derivatives primarily convert interest receipts on variable-rate fixed maturity securities to fixed rates. The Company has also entered into interest rate swaps to convert the variable interest payments on the $500 junior subordinated debentures due 2067 to fixed interest payments. For further information, see the Junior Subordinated Debentures section within Note 14 - Debt. Foreign currency swaps are used to convert foreign currency-denominated cash flows related to certain investment receipts to U.S. dollars in order to reduce cash flow fluctuations due to changes in currency rates. Non-qualifying Strategies Derivative relationships that do not qualify for hedge accounting (“non-qualifying strategies”) primarily include hedges of interest rate, foreign currency, equity, and commodity risk of certain fixed maturities and equities. In addition, hedging and replication strategies that utilize credit default swaps do not qualify for hedge accounting.

Significant Accounting (Policies)

12 Months Ended

Dec. 31, 2023

The Hartford Financial Services Group, Inc. ("HFSG") is a holding company for insurance and financial services subsidiaries that provide property and casualty ("P&C") insurance, group life and disability products and mutual funds and exchange-traded funds ("ETF") to individual and business customers in the United States as well as in the United Kingdom and other international locations (collectively, “The Hartford”, the “Company”, “we” or “our”).

On December 29, 2021, the Company completed the sale of all of Navigators Holdings (Europe) N.V., a Belgium holding company, and its subsidiaries, Bracht, Deckers & Mackelbert N.V. and Assurances Contintales Contintale Verzekeringen N.V., collectively referred to as "Continental Europe Operations". For further discussion of this transaction, see Note 22 - Business Dispositions.

The Consolidated Financial Statements have been prepared in accordance with accounting principles generally accepted in the United States of America (“U.S. Generally Accepted Accounting Principles”) which differ materially from the accounting practices prescribed by various insurance regulatory authorities.

Consolidation

The Consolidated Financial Statements include the accounts of The Hartford Financial Services Group, Inc., and entities in which the Company directly or indirectly has a controlling financial interest. Entities in which the Company has significant influence over the operating and financing decisions but does not control are reported using the equity method. Intercompany transactions and balances between The Hartford and its subsidiaries and affiliates have been eliminated.

Use of Estimates

The preparation of financial statements in conformity with U.S. Generally Accepted Accounting Principles ("GAAP") requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities and the 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. Actual results could differ from those estimates.

The most significant estimates include those used in determining property and casualty and group long-term disability ("LTD") insurance product reserves, net of reinsurance; evaluation of goodwill for impairment; valuation of investments and derivative instruments; and contingencies relating to corporate litigation and regulatory matters.

Reclassifications

Certain reclassifications have been made to prior year financial information to conform to the current year presentation.

Adoption of New Accounting Standards

Future Adoption of New Accounting Standards

Segment Disclosures

The FASB issued new guidance on Segment Reporting that requires enhanced disclosures on an annual and quarterly basis about significant segment expenses that are regularly provided to the chief operating decision maker (“CODM”) and included within the reported measure of segment profit or loss. The new guidance also requires disclosure of the title and position of the CODM as well as a description of how the reported measure of profit or loss is used to assess segment performance and allocate resources. The Company is required to provide the new disclosures beginning with the December 31, 2024 consolidated financial statements and on a quarterly basis beginning with the March 31, 2025 interim condensed consolidated financial statements. The new guidance will be applied on a retrospective basis for all periods presented. The Company is evaluating the disclosure impact of the new guidance; however, the new guidance will not have an impact on the consolidated financial position, results of operations, or cash flows.

Income Tax Disclosures

The FASB issued new disclosure requirements for income taxes primarily for the income tax rate reconciliation and income taxes paid. The income tax rate reconciliation within the income taxes note will present reconciling items based on specified categories with further disaggregation of items above a prescribed threshold. Disclosure of income taxes paid (net of refunds received) in the consolidated statement of cash flows will be disaggregated by federal (national), state, and foreign taxes with further disaggregation by individual jurisdictions subject to a

prescribed threshold. The Company is required to provide the new disclosure annually beginning with the December 31, 2025 consolidated financial statements. Disclosures are required to be provided on a prospective basis. Early adoption in an annual period and retrospective application is permitted. The Company is evaluating the disclosure impact of the new guidance; however, the new guidance will not have an impact on the consolidated financial position, results of operations, or cash flows.

Description of New Accounting Pronouncements Not yet Adopted [Text Block]

Adoption of New Accounting Standards

Reference Rate Reform

On March 12, 2020, the Company adopted the Financial Accounting Standard Board's ("FASB") temporary guidance, which allows The Hartford to account for contract modifications made solely due to rate reform (such as replacing London Inter-Bank Offered Rate ("LIBOR") with another reference rate) as continuations of existing contracts and to maintain hedge accounting when the hedging effectiveness between a financial instrument and its hedge is only affected by the change to a replacement rate. As a result, The Hartford did not recognize gains and losses during the transition period of LIBOR to an alternative reference rate that would otherwise have arisen from accounting assessments and remeasurements. On December 21, 2022, the FASB extended the effective date for the temporary guidance and the temporary guidance now expires for contract modifications made and hedge relationships entered into or evaluated after December 31, 2024. The Company is not required to measure the effect of adoption on its financial position, cash flows or net income because the guidance provides relief from accounting for the effects of the change to a replacement rate.

Reserve for Future Policy Benefits

On January 1, 2023, the Company adopted the FASB’s updated guidance on accounting for long duration insurance contracts, which was applied on a modified retrospective basis as of January 1, 2021.

The new guidance requires the discount rate assumption to be updated, as of the transition date and quarterly going forward, to a current upper-medium grade fixed-income investment yield, which has been interpreted to represent a yield based on single-A credit rated fixed maturity instruments with similar duration to the liability. The new guidance also eliminated the requirement to adjust the reserve for future policy benefits for unrealized gains and losses on fixed maturity investments as if those unrealized gains and losses were realized (referred to as shadow reserves). The change in the reserve estimate resulting from updating the discount rate assumptions and eliminating shadow reserves was recognized as a net cumulative effect adjustment that increased the reserve for future policy benefits by $85 and decreased AOCI by $65, net of deferred tax effects, as of January 1, 2021.

The new guidance also requires that underlying cash flow assumptions (i.e., mortality, lapse and expense) in the reserve for future policy benefits be based on best estimate assumptions. The adjustments to the reserve for future policy benefits at adoption resulted in establishing a deferred profit liability on limited pay contracts of $18 representing the estimated profits based on best estimate cash flow assumptions.

Revenue Recognition

Premium Revenue from Direct Insurance and Assumed Reinsurance

Property and casualty premiums are earned on a pro rata basis over the policy period and include accruals for policies that have been written by agents but not yet reported to us, as well as ultimate premium revenue anticipated under auditable and retrospectively rated policies. We estimate the amount of premium not yet reported based on current and historical trends of the business being written. Such estimates are regularly reviewed and updated and any resulting adjustments are included in the current year's results. Unearned premiums represent the premiums applicable to the unexpired terms of policies in force, or period of risk.

Group life, disability and accident premiums are generally due from policyholders and recognized as revenue on a pro rata basis over the period of the contracts.

An estimated ACL is recorded on the basis of periodic evaluations of balances due from insureds and considering

historical credit loss information, adjusted for current economic conditions as well as reasonable and supportable forecasts when appropriate. The Company records total credit loss expenses related to premiums receivable in insurance operating costs and other expenses. Write-offs of premiums receivable and agents' balances and any related ACL are recorded in the period in which the balance is deemed uncollectible. Refer to Note 7 - Premiums Receivable and Agents' Balances for further discussion regarding the allowance for doubtful accounts included in premiums receivable and agents’ balances.

Non-Insurance Revenue from Contracts with Customers

Installment fees are charged on property and casualty insurance contracts for billing the insurance customer in installments over the policy term. These fees are recognized in fee income as earned on collection.

Insurance servicing revenues within Personal Lines consist of up-front commissions earned for collecting premiums and processing claims on insurance policies for which The Hartford does not assume underwriting risk, predominantly related to the National Flood Insurance Plan program. These insurance servicing revenues are recognized in other revenues over the period of the flood program's policy terms.

Group Benefits earns fee income from employers for the administration of underwriting, implementation and claims processing for employer self-funded plans and for leave management services. Fees are recognized as services are provided and collected monthly.

Hartford Funds provides investment management, administrative and distribution services to mutual funds and exchange-traded funds. The Company assesses investment advisory, distribution and other asset management fees primarily based on the average daily net asset values from mutual funds and exchange-traded funds, which are recorded in the period in which the services are provided and are collected monthly. Fluctuations in domestic and international markets and related investment performance, volume and mix of sales and redemptions of mutual funds or exchange-traded funds, and other changes to the composition of assets under management ("AUM") are all factors that ultimately have a direct effect on fee income earned.

Corporate investment management and other fees are primarily for managing third party invested assets, including management of a portion of the invested assets of The Hartford’s former life and annuity business. These fees, calculated based on the average quarterly net asset values, are recorded in the period in which the services are provided and are collected quarterly. Fluctuations in markets and interest rates and other changes to the composition of assets under management are all factors that ultimately have a direct effect on fee income earned.

Dividends to Policyholders

Policyholder dividends are paid to certain property and casualty policyholders. Policies that receive dividends are referred to as participating policies. Participating dividends to policyholders are accrued and reported in insurance operating costs and other expenses and other liabilities using an estimate of the amount to

be paid based on underlying contractual obligations under policies and applicable state laws.

Net written premiums for participating property and casualty insurance policies represented 6%, 7%, and 7% of total net written premiums for each of the years ended December 31, 2023, 2022 and 2021, respectively. Participating dividends to property and casualty policyholders were $39, $29 and $24 for the years ended December 31, 2023, 2022 and 2021, respectively.

There were no additional amounts of income allocated to participating policyholders.

Investments

Overview

The Company’s investments in fixed maturities consist of bonds, including structured securities, and redeemable preferred stock. Most of these investments are classified as AFS and are carried at fair value. The after tax difference between fair value and cost or amortized cost is reflected in stockholders’ equity as a component of AOCI. Fixed maturities for which the Company elected the fair value option are classified as FVO and are carried at fair value with changes in value recorded in net realized gains and losses. These investments represent certain investments in residual interests of securitizations and other securities that contain embedded credit derivatives. Equity securities are measured at fair value with any changes in valuation reported in net realized gains and losses. Mortgage loans are recorded at the outstanding principal balance adjusted for amortization of premiums or discounts and net of an ACL. Short-term investments are carried at amortized cost, which approximates fair value. Limited partnerships and other alternative investments are reported at their carrying value and are primarily accounted for under the equity method with the Company’s share of earnings included in net investment income. Recognition of income related to limited partnerships and other alternative investments is delayed due to the availability of the related financial information, as private equity and other funds are generally received on a three-month delay. Accordingly, income for the years ended December 31, 2023, 2022, and 2021 may not include the full impact of current year changes in valuation of the underlying assets and liabilities of the funds, which are generally obtained from the limited partnerships. Other investments primarily consist of equity fund investments, overseas deposits which are measured at fair value using the net asset value as a practical expedient, consolidated investment funds for which the Company has provided seed money and reports the underlying investments at fair value with changes in the fair value recognized in income consistent with accounting requirements for investment companies, and derivative instruments which are carried at fair value.

Net Realized Gains and Losses

Net realized gains and losses from investment sales are reported as a component of revenues and are determined on a specific identification basis. Net realized gains and losses also result from fair value changes in equity securities, fixed maturities, FVO, and derivatives contracts that do not qualify, or are not designated, as a hedge for accounting purposes. The Company records net credit losses on fixed maturities, AFS and

changes in the ACL on mortgage loans as a component of net realized gains and losses. Future changes in the ACL resulting from improvements in expected future cash flows are recorded through net realized gains and losses.

Net Investment Income

Interest income from fixed maturities and mortgage loans is recognized when earned on the constant effective yield method based on the estimated timing of cash flows. Most premiums and discounts on fixed maturities are amortized to the maturity date. Premiums on callable bonds may be amortized to call dates based on call prices. For structured financial assets subject to prepayment risk, yields are recalculated and adjusted periodically to reflect historical and/or estimated future prepayments using the retrospective method. For certain other structured securities, including securities that previously had an ACL and interest only securities, any yield adjustments are made using the prospective method. Prepayment fees and make-whole payments on fixed maturities and mortgage loans are recorded in net investment income when earned. For equity securities, dividends are recognized as investment income on the ex-dividend date. Limited partnerships and other alternative investments primarily use the equity method of accounting to recognize the Company’s share of earnings. For fixed maturities with an ACL, net investment income is recognized at the original effective rate and accretion of the ACL is recognized through net realized gains and losses. The Company’s non-income producing investments were not material for the years ended December 31, 2023, 2022 and 2021.

Accrued Investment Income

Accrued investment income primarily includes accruals of interest and dividend income from investments that have been earned but not yet received.

Derivatives

Derivative Instruments

Overview

The Company utilizes a variety of over-the-counter ("OTC") derivatives, derivatives cleared through central clearing houses ("OTC-cleared") and exchange traded derivative instruments as part of its overall risk management strategy as well as to engage in income generation covered call transactions and replication transactions. The types of instruments may include swaps, caps, floors, forwards, futures and options to achieve the following Company-approved objectives:

•to hedge risk arising from interest rate, equity market, commodity market, credit spread and issuer default, price or currency exchange rates or volatility;

•to manage liquidity;

•to control transaction costs;

•to enter into income generation covered call transactions and synthetic replication transactions.

Interest rate and credit default swaps involve the periodic exchange of cash flows with other parties, at specified intervals, calculated using agreed upon rates or other financial variables and notional principal amounts. Generally, little to no cash or principal payments are exchanged at the inception of the contract. Typically, at the time a swap is entered into, the cash

flow streams exchanged by the counterparties are equal in value.

The Company clears certain interest rate swap and credit default swap derivative transactions through central clearing houses. OTC-cleared derivatives require initial collateral at the inception of the trade in the form of cash or highly liquid securities, such as U.S. Treasuries and government agency investments. Central clearing houses also require additional cash as variation margin based on daily market value movements. For information on collateral, see the Derivative Collateral Arrangements section in Note 6 - Derivatives. In addition, OTC-cleared transactions include price alignment amounts either received or paid on the variation margin, which is characterized as interest and reflected in net investment income.

Forward contracts are customized commitments that specify a rate of interest or currency exchange rate to be paid or received on an obligation beginning on a future start date and are typically settled in cash.

Financial futures are standardized commitments to either purchase or sell designated financial instruments, at a future date, for a specified price and may be settled in cash or through delivery of the underlying instrument. Futures contracts trade on organized exchanges. Margin requirements for futures are met by pledging securities or cash, and changes in the futures’ contract values are settled daily in cash.

Option contracts grant the purchaser, for a premium payment, the right to either purchase from or sell to the issuer a financial instrument at a specified price, within a specified period or on a stated date. The contracts may reference commodities, which grant the purchaser the right to either purchase from or sell to the issuer commodities at a specified price, within a specified period or on a stated date. Option contracts are typically settled in cash.

Foreign currency swaps exchange an initial principal amount in two currencies, agreeing to re-exchange the currencies at a future date, at an agreed upon exchange rate. There may also be a periodic exchange of payments at specified intervals calculated using the agreed upon rates and exchanged principal amounts.

The Company’s derivative transactions conducted in insurance company subsidiaries are used in strategies permitted under the derivative use plans required by the State of Connecticut, the State of Illinois and the State of New York insurance regulators.

Accounting and Financial Statement Presentation of Derivative Instruments and Hedging Activities

Derivative instruments are recognized on the Consolidated Balance Sheets at fair value and are reported in Other Investments and Other Liabilities. For balance sheet presentation purposes, the Company has elected to offset the fair value amounts, income accruals, and related cash collateral receivables and payables of OTC derivative instruments executed in a legal entity and with the same counterparty or

under a master netting agreement, which provides the Company with the legal right of offset.

On the date the derivative contract is entered into, the Company designates the derivative as (1) a hedge of the fair value of a recognized asset or liability (“fair value” hedge), (2) a hedge of the variability in cash flows of a forecasted transaction or of amounts to be received or paid related to a recognized asset or liability (“cash flow” hedge), (3) a hedge of a net investment in a foreign operation (“net investment” hedge) or (4) held for other investment and/or risk management purposes, which primarily involve managing asset or liability related risks and do not qualify for hedge accounting. The Company currently does not designate any derivatives as fair value or net investment hedges.

Cash Flow Hedges - Changes in the fair value of a derivative that is designated and qualifies as a cash flow hedge, including foreign-currency cash flow hedges, are recorded in AOCI and are reclassified into earnings when the variability of the cash flow of the hedged item impacts earnings. Gains and losses on derivative contracts that are reclassified from AOCI to current period earnings are included in the line item in the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Periodic derivative net coupon settlements are recorded in the line item of the Consolidated Statements of Operations in which the cash flows of the hedged item are recorded. Cash flows from cash flow hedges are presented in the same category as the cash flows from the items being hedged in the Consolidated Statement of Cash Flows.

Other Investment and/or Risk Management Activities - The Company’s other investment and/or risk management activities primarily relate to strategies used to reduce economic risk or replicate permitted investments and do not receive hedge accounting treatment. Changes in the fair value, including periodic derivative net coupon settlements, of derivative instruments held for other investment and/or risk management purposes are reported in current period earnings as net realized gains and losses.

Hedge Documentation and Effectiveness Testing

To qualify for hedge accounting treatment, a derivative must be highly effective in mitigating the designated changes in fair value or cash flows of the hedged item. At hedge inception, the Company formally documents all relationships between hedging instruments and hedged items, as well as its risk-management objective and strategy for undertaking each hedge transaction. The documentation process includes linking derivatives that are designated as fair value, cash flow, or net investment hedges to specific assets or liabilities on the balance sheet or to specific forecasted transactions and defining the effectiveness testing methods to be used. The Company also formally assesses both at the hedge’s inception and ongoing on a quarterly basis, whether the derivatives that are used in hedging transactions have been and are expected to continue to be highly effective in offsetting changes in fair values, cash flows or net investment in foreign operations of hedged items. Hedge effectiveness is assessed primarily using quantitative methods as well as using qualitative methods. Quantitative methods include regression or other statistical analysis of changes in fair value or cash flows associated with the hedge relationship. Qualitative methods may

include comparison of critical terms of the derivative to the hedged item.

Discontinuance of Hedge Accounting

The Company discontinues hedge accounting prospectively when (1) it is determined that the qualifying criteria are no longer met; (2) the derivative is no longer designated as a hedging instrument; or (3) the derivative expires or is sold, terminated or exercised.

When cash flow hedge accounting is discontinued because the Company becomes aware that it is not probable that the forecasted transaction will occur, the derivative continues to be carried on the balance sheet at its fair value, and gains and losses that were accumulated in AOCI are recognized immediately in earnings.

In other situations in which hedge accounting is discontinued, including those where the derivative is sold, terminated or exercised, amounts previously deferred in AOCI are reclassified into earnings when earnings are impacted by the hedged item.

Embedded Derivatives

The Company may purchase investments that contain embedded derivative instruments. When it is determined that (1) the embedded derivative possesses economic characteristics that are not clearly and closely related to the economic characteristics of the host contract and (2) a separate instrument with the same terms would qualify as a derivative instrument, the embedded derivative is bifurcated from the host for measurement purposes. The embedded derivative, which is reported with the host instrument in the Consolidated Balance Sheets, is carried at fair value with changes in fair value reported in net realized gains and losses.

Credit Risk of Derivative Instruments

Credit risk is defined as the risk of financial loss due to uncertainty of an obligor’s or counterparty’s ability or willingness to meet its obligations in accordance with agreed upon terms. Credit exposures are measured using the market value of the derivatives, resulting in amounts owed to the Company by its counterparties or potential payment obligations from the Company to its counterparties. The Company generally requires that OTC derivative contracts, other than certain forward contracts, be governed by International Swaps and Derivatives Association agreements which are structured by legal entity and by counterparty, and permit right of offset. Some agreements require daily collateral settlement based upon agreed upon thresholds. For purposes of daily derivative collateral maintenance, credit exposures are generally quantified based on the prior business day’s market value and collateral is pledged to and held by, or on behalf of, the Company to the extent the current value of the derivatives is greater than zero, subject to minimum transfer thresholds, if applicable. The Company also minimizes the credit risk of derivative instruments by entering into transactions with high quality counterparties primarily rated A or better, which are monitored and evaluated by the Company’s risk management team and reviewed by senior management. OTC-cleared derivatives are governed by clearing house rules. Transactions cleared through a central clearing house reduce risk due to their ability to require daily variation margin and act as an independent valuation source. In addition, the Company monitors counterparty credit exposure on

a monthly basis to ensure compliance with Company policies and statutory limitations.

For reporting purposes, the Company has elected to offset within assets or liabilities based upon the net of the fair value amounts, income accruals, and related cash collateral receivables and payables of OTC derivative instruments executed in a legal entity and with the same counterparty under a master netting agreement, which provides the Company with the legal right of offset.

Cash

Cash and Restricted Cash

Cash represents cash on hand and demand deposits with banks or other financial institutions. Restrictions on cash primarily relate to funds that are held to support regulatory and contractual obligations.

Reinsurance

The Company cedes insurance to affiliated and unaffiliated insurers in order to limit its maximum losses and to diversify its exposures and provide statutory surplus relief. Such arrangements do not relieve the Company of its primary liability to policyholders. Failure of reinsurers to honor their obligations could result in losses to the Company. The Company also assumes reinsurance from other insurers and is a member of and participates in reinsurance pools and associations. Assumed reinsurance refers to the Company’s acceptance of certain insurance risks that other insurance companies or pools have underwritten.

Reinsurance accounting is followed for ceded and assumed transactions that provide indemnification against loss or liability relating to insurance risk (i.e., risk transfer). To meet risk transfer requirements, a reinsurance agreement must include insurance risk, consisting of underwriting and timing risk, and a reasonable possibility of a significant loss to the reinsurer. If the ceded and assumed transactions do not meet risk transfer requirements, the Company accounts for these transactions as deposit transactions. The Company had no deposit liability as of December 31, 2023 and 2022, reported in other liabilities.

Premiums, benefits, losses and loss adjustment expenses reflect the net effects of ceded and assumed reinsurance transactions. Included in other assets are prepaid reinsurance premiums, which represent the portion of premiums ceded to reinsurers applicable to the unexpired terms of the reinsurance contracts. Reinsurance recoverables are balances due from reinsurers for ceded paid and unpaid losses and loss adjustment expenses and are presented net of an allowance for uncollectible reinsurance. Changes in the allowance for uncollectible reinsurance are reported in benefits, losses and loss adjustment expenses in the Company's Consolidated Statements of Operations.

The Company periodically evaluates the recoverability of its reinsurance recoverable assets and establishes an allowance for uncollectible reinsurance. The allowance for uncollectible reinsurance reflects management’s best estimate of reinsurance cessions that may be uncollectible in the future due to reinsurers’ unwillingness or inability to pay. The allowance for uncollectible reinsurance comprises an ACL and an allowance for disputed balances. Based on this analysis, the Company may adjust the allowance for uncollectible reinsurance or charge off reinsurer balances that are determined to be uncollectible. The Company records credit losses related to reinsurance recoverables in benefits, losses and loss adjustment expenses. Write-offs of reinsurance recoverables and any related ACL are recorded in the period in which the balance is deemed

uncollectible. Expected recoveries are included in the estimate of the ACL.

Retroactive reinsurance agreements, including adverse development covers ("ADC"), are reinsurance agreements under which our reinsurer agrees to reimburse us as a result of loss development related to past insurable events. For these agreements, the consideration paid in excess of the estimated ultimate losses to be recovered under the agreement at inception is recognized as a loss on reinsurance transaction. The benefit of subsequent adverse development ceded up to the total consideration paid is recognized as ceded losses, which are a reduction of incurred losses and loss adjustment expenses. The excess of the estimated amounts ultimately to be recovered under the agreement over the consideration paid is recognized as a deferred gain liability and amortized into income over the period the ceded losses are recovered in cash from the reinsurer. The amount of the deferred gain liability is recalculated each period based on cumulative recoveries not yet collected relative to the latest estimate of ultimate losses to be recovered. Ceded loss reserves under retroactive agreements were $1.7 billion and $1.5 billion, and the deferred gain liability reported in other liabilities was $997 and $803, as of December 31, 2023 and 2022, respectively. In any given period, the change in deferred gain included in net income includes amortization of the deferred gain based on the percentage of ultimate ceded losses collected plus any change in the deferred gain liability due to changes in the estimated ultimate losses to be recovered. The effect on income from change in the deferred gain was a charge to earnings of $194, $229 and $246 before tax for the years ended December 31, 2023, 2022, and 2021 respectively.

Deferred Policy Acquisition Costs

DAC represents costs that are directly related to the acquisition of new and renewal insurance contracts and incremental direct costs of contract acquisition that are incurred in transactions with independent third parties or in compensation to employees. Such costs primarily include commissions, premium taxes, costs and certain other expenses that are directly related to successfully issued contracts, including a portion of policy issuance and underwriting costs.

For P&C insurance products and group life, disability and accident contracts, costs are deferred and amortized ratably over the period the related premiums are earned. Deferred acquisition costs are reviewed to determine if they are recoverable from future income, and if not, are charged to expense. Anticipated investment income is considered in the determination of the recoverability of DAC.

Income Taxes

The Company recognizes taxes payable or refundable for the current year and deferred taxes for the tax consequences of temporary differences between the financial reporting and tax basis of assets and liabilities. Deferred tax assets and liabilities are measured using enacted tax rates expected to apply to taxable income in the years the temporary differences are expected to reverse. A deferred tax provision is recorded for the tax effects of temporary differences between the Company's current taxable income and its income before tax under generally accepted accounting principles in the Consolidated

Statements of Operations. For deferred tax assets, the Company records a valuation allowance that is adequate to reduce the total deferred tax asset to an amount that will more likely than not be realized.

Goodwill and Intangible Assets

Goodwill

Goodwill represents the excess of the cost to acquire a business over the acquisition date fair value of net assets acquired. Goodwill is not amortized but is reviewed for impairment at least annually or more frequently if events occur or circumstances change that would indicate that a triggering event for a potential impairment has occurred. Goodwill is tested for impairment by comparing the fair value of a reporting unit to its carrying value. Goodwill is impaired up to the amount that the carrying value of the reporting unit exceeds the fair value. A reporting unit is defined as an operating segment or one level below an operating segment. The Company’s reporting units, for which goodwill has been allocated consist of Commercial Lines, Personal Lines, Group Benefits, and Hartford Funds.

Management’s determination of the fair value of each reporting unit incorporates multiple inputs into discounted cash flow calculations, including assumptions that market participants would make in valuing the reporting unit. Assumptions include levels of economic capital required to support the business, future business growth, earnings projections, the weighted average cost of capital used for purposes of discounting and, for the Hartford Funds segment, assets under management. Decreases in business growth, decreases in earnings projections and increases in the weighted average cost of capital will all cause a reporting unit’s fair value to decrease, increasing the possibility of impairments.

Intangible Assets

Acquired intangible assets on the Consolidated Balance Sheets include purchased customer relationship and agency or other distribution rights and licenses measured at fair value at acquisition. The Company amortizes finite-lived other intangible assets over their useful lives generally on a straight-line basis over the period of expected benefit, ranging from 1 to 15 years. Management revises amortization periods if it believes there has been a change in the length of time that an intangible asset will continue to have value. Indefinite-lived intangible assets are not subject to amortization. Intangible assets are assessed for impairment generally when events or circumstances indicate a potential impairment and at least annually for indefinite-lived intangibles. Finite-lived intangible assets are impaired if the carrying amount is not recoverable from undiscounted cash flows. Indefinite-lived intangible assets are impaired if the carrying amount exceeds fair value. Impaired intangible assets are written down to fair value.

Property and Equipment

Property and equipment, which includes capitalized software and right-of-use lease assets, is carried at cost net of accumulated depreciation. Depreciation is based on the estimated useful lives of the various classes of property and equipment and is recognized principally on the straight-line method. Accumulated depreciation was $2.4 billion and $2.3 billion as of December 31, 2023 and 2022, respectively. Depreciation expense was $204, $213, and $282 for the years

ended December 31, 2023, 2022 and 2021, respectively, and is reported in insurance operating costs and other expenses. The costs to access and develop hosted software arrangements, where The Hartford has the right to access and use the software, but not take possession, and the cost of certain software licenses are reported in other assets on a straight-line basis over the service period. Amortization of hosted software and certain software licenses was $85, $78, and $60 for the years ended December 31, 2023, 2022, and 2021, respectively, and is reported in insurance operating costs and other expenses.

Leases

Leases are classified as financing or operating leases. Where the lease is economically similar to a purchase because The Hartford obtains control of the underlying asset, the lease is classified as a financing lease and the Company recognizes amortization of the right of use asset and interest expense on the liability. Where the lease is not economically similar to a purchase as the lease provides The Hartford with only the right to control the use of the underlying asset over the lease term and the lease term is greater than one year, the lease is an operating lease and the lease cost is recognized as rental expense over the lease term on a straight-line basis. Leases with a term of one year or less are also expensed over the lease term but not recognized on the Consolidated Balance Sheets.

Unpaid Policy Claims and Claims Adjustment Expenses

Unpaid Losses and Loss Adjustment Expenses

For property and casualty and group life, disability and accident insurance and assumed reinsurance products, the Company establishes reserves for unpaid losses and loss adjustment expenses to provide for the estimated costs of paying claims under insurance policies written by the Company. These reserves include estimates for both claims that have been reported and those that have not yet been reported, and include estimates of all losses and loss adjustment expenses associated with processing and settling these claims. Estimating the ultimate cost of future losses and loss adjustment expenses is an uncertain and complex process. This estimation process is based significantly on the assumption that past developments are an appropriate predictor of future events, and involves a variety of actuarial techniques that analyze experience, trends and other relevant factors. The effects of inflation are implicitly considered in the reserving process. In addition, a number of complex factors influence the uncertainties involved with the reserving process including social and economic trends and changes in the concepts of legal liability and damage awards. Accordingly, final claim settlements may vary from the present estimates, particularly when those payments may not occur until well into the future. The Company regularly reviews the adequacy of its estimated losses and loss adjustment expense reserves by reserve line within the various reporting segments. Adjustments to previously established reserves are reflected in the operating results of the period in which the adjustment is determined to be necessary. Such adjustments could possibly be significant, reflecting any variety of new and adverse or favorable trends.

Most of the Company’s property and casualty insurance products reserves are not discounted. However, the Company

has discounted to present value certain reserves for indemnity payments that are due to claimants under workers’ compensation policies because the payment pattern and the ultimate costs are reasonably fixed and determinable on an individual claim basis. The discount rate is based on the risk free rate for the expected claim duration as determined in the year the claims were incurred. The Company also has discounted liabilities for structured settlement agreements that provide fixed periodic payments to claimants. These structured settlements include annuities purchased to fund unpaid losses for permanently disabled claimants. These structured settlement liabilities are discounted to present value using the rate implicit in the purchased annuities and the purchased annuities are accounted for within reinsurance recoverables.

Group life and disability contracts with long-tail claim liabilities are discounted because the payment pattern and the ultimate costs are reasonably fixed and determinable on an individual claim basis. The discount rates are estimated based on investment yields expected to be earned on the cash flows net of investment expenses and expected credit losses. The Company establishes discount rates for these reserves in the year the claims are incurred (the incurral year) which is when the estimated settlement pattern is determined. The discount rate for life and disability reserves acquired from Aetna's U.S. group life and disability business were based on interest rates in effect at the acquisition date of November 1, 2017.

For further information about how unpaid losses and loss adjustment expenses are established, see Note 11 - Reserve for Unpaid Losses and Loss Adjustment Expenses.

Liability for Future Policy Benefit

Reserve for Future Policy Benefits

The Company’s reserves for future policy benefits includes paid-up life insurance and whole-life policies resulting from conversion from group life policies included within the Group Benefits segment and reserves for run-off structured settlement and terminal funding agreement liabilities, which are reported in the Corporate category.

Contracts are grouped into cohorts by contract type and issue year. The Company establishes reserves for future policy benefits using the net premium approach, which represents the present value of future policyholder benefits and related expenses less the present value of future net premiums. Net premiums are calculated by multiplying gross premiums for the contracts in a specific cohort by a net premium ratio. The net premium ratio is determined for the lifetime of a given cohort as the present value of net benefits divided by the present value of gross premiums. Related expenses include termination and settlement costs and exclude acquisition costs and non-claim related costs, such as costs relating to investments, general administration, policy maintenance, product development, market research and general overhead or any other costs, which are expensed as incurred.

The Company estimates premiums, benefits and related expense cash flows using methods that include assumptions, such as estimates of mortality, lapse, and claim-related expenses, and the possible impact of inflation on those expenses. Benefits include all guaranteed cash flows to be paid to the policyholder.

The reserve for future policy benefits is adjusted for differences between actual and expected experience. Each quarter, the Company updates its estimates of cash flows expected over the life of a group of contracts using actual historical experience. These updated cash flows are used to calculate the revised net premiums and net premium ratio, which are used to derive an updated reserve for future policy benefits. In subsequent periods, the revised net premiums are used to measure the reserve for future policy benefits, subject to future revisions. Future cash flow assumptions, including mortality, lapse and expense are reviewed and, if a change is indicated, updated at least annually in the third quarter.

The difference between the newly calculated reserve balance and the reserve balance before updating for actual experience and/or future cash flow assumptions is the remeasurement gain or loss, which is immaterial for each of the years ended December 31, 2023, 2022 and 2021 is presented in benefits losses and loss adjustments expense in the Consolidated Statements of Operations. Changes to the reserve due to updates to cash flow assumptions discounted at the discount rate used immediately prior to transition are recognized on a catch-up basis in the Consolidated Statement of Operations.

The discount rate assumption is an equivalent single rate that is based on a current market observable, upper-medium grade fixed maturity yield. This has been interpreted to represent a yield based on single-A credit rated fixed maturity instruments with similar duration to the liability. The Company uses the yield of a market observable index of single-A credit rated fixed maturities as the basis for setting the discount rate. The discount rate assumption is updated quarterly and the change in the reserve estimate resulting from updating the discount rate assumption is recognized in other comprehensive income.

TreasuryStockPolicy

Treasury Stock

Treasury stock is the cost of common stock repurchased, which includes the purchase price of shares acquired and direct costs to acquire shares, including commissions and excise taxes. Issuance and retirement of treasury stock is recognized at the average cost of shares held in treasury.

Foreign Currency

Foreign currency translation gains and losses are reflected in stockholders’ equity as a component of AOCI. The Company’s foreign subsidiaries’ balance sheet accounts are translated at the exchange rates in effect at each year end and income statement accounts are translated at the average rates of exchange prevailing during the year. The national currencies of the international operations are generally their functional currencies; however, the U.S. dollar is the functional currency of Lloyd's Syndicate 1221 ("Lloyd's Syndicate"), for which the Company is the sole corporate member. Gains and losses resulting from the remeasurement of foreign currency transactions are reflected in earnings in net realized gains (losses) in the period in which they occur.

Derivatives, Methods of Accounting, Hedge Documentation

Strategies that Qualify for Hedge Accounting

Some of the Company's derivatives satisfy hedge accounting requirements as outlined in Note 1 - Basis of Presentation and Significant Accounting Policies. Typically, these hedging instruments include interest rate swaps and, to a lesser extent, foreign currency swaps where the terms or expected cash flows of the hedged item closely match the terms of the swap. The interest rate swaps are typically used to manage interest rate duration of certain fixed maturity securities or debt instruments issued.

Cash Flow Hedges

Interest rate swaps are predominantly used to manage portfolio duration and better match cash receipts from assets with cash disbursements required to fund liabilities. These derivatives primarily convert interest receipts on variable-rate fixed maturity securities to fixed rates. The Company has also entered into interest rate swaps to convert the variable interest payments on the $500 junior subordinated debentures due 2067 to fixed interest payments. For further information, see the Junior Subordinated Debentures section within Note 14 - Debt.

Foreign currency swaps are used to convert foreign currency-denominated cash flows related to certain investment receipts to U.S. dollars in order to reduce cash flow fluctuations due to changes in currency rates.

Non-qualifying Strategies

Derivative relationships that do not qualify for hedge accounting (“non-qualifying strategies”) primarily include hedges of interest rate, foreign currency, equity, and commodity risk of certain fixed maturities and equities. In addition, hedging and replication strategies that utilize credit default swaps do not qualify for hedge accounting.