Summary of Significant Accounting Policies (Policies)	12 Months Ended
Dec. 31, 2024
Accounting Policies [Abstract]
Business	Business Genuine Parts Company is a distributor of automotive replacement parts and industrial parts and materials. We serve a diverse customer base through a network of more than 10,700 locations throughout North America, Europe, and Australasia.
Principles of Consolidation	Principles of Consolidation The consolidated financial statements include all of our accounts. The net income attributable to noncontrolling interests is not material to our consolidated net income. Intercompany accounts and transactions have been eliminated in consolidation.
Reclassifications	Certain prior year amounts are reclassified to conform to the current year presentation. These reclassifications had no impact on our previously reported total assets, total liabilities, results of operations, comprehensive income or net cash flows from operating, financing or investing activities. We have evaluated subsequent events through the date the financial statements were issued.
Use of Estimates	Use of Estimates The preparation of the consolidated financial statements, in conformity with U.S. generally accepted accounting principles, requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results may differ from those estimates and the differences could be material.
Revenue Recognition	Revenue Recognition We recognize revenue at the point the customer obtains control of the products or services and at an amount that reflects the consideration expected to be received for those products or services. Revenue is recognized net of allowances for returns, variable consideration and any taxes collected from customers that will be remitted to governmental authorities. Revenue recognized over time is not significant. Payment terms with customers vary by the type and location of the customer and the products or services offered. We do not adjust the promised amount of consideration for the effects of significant financing components based on the expectation that the period between when we transfer a promised good or service to a customer and when the customer pays for that good or service will be one year or less. Arrangements with customers that include payment terms extending beyond one year are not significant. Liabilities for customer incentives, discounts, sales returns or rebates are included in other current liabilities in the consolidated balance sheets. Product Distribution Revenues We generate revenue primarily by distributing products through wholesale and, to a lesser extent, retail channels. For wholesale customers, revenue is recognized when title and control of the goods has passed to the wholesale customer. Retail revenue is recognized at the point of sale when the goods are transferred to customers and consideration is received. Certain shipping and handling activities may be performed prior to the customer obtaining control of the products. Costs associated with shipping and handling to our customers are considered costs to fulfill a contract and are included in selling, administrative and other expenses in the period they are incurred. Other Revenues We offer software support, product cataloging, marketing, training and other membership program and support services to certain customers. This revenue is recognized as services are performed. Revenue from these services is recognized over a short duration and the impact to our consolidated financial statements is not significant. Variable Consideration Our products are generally sold with a right of return and may include variable consideration in the form of incentives, discounts, credits or rebates. We estimate variable consideration based on historical experience to determine the expected amount to which we will be entitled in exchange for transferring the promised goods or services to a customer. We recognize estimated variable consideration as an adjustment to the transaction price when control of the related product or service is transferred. The realization of variable consideration occurs within a short period of time from product delivery; therefore, the time value of money effect is not significant.
Foreign Currency Translation	Foreign Currency Translation The consolidated balance sheets and statements of income of our foreign subsidiaries have been translated into U.S. dollars at the current and average exchange rates, respectively. The foreign currency translation adjustment is included as a component of accumulated other comprehensive loss.
Cash and Cash Equivalents	Cash and Cash Equivalents We consider all highly liquid investments with original maturities of three months or less when purchased to be cash equivalents.
Trade Accounts Receivable and the Allowance for Doubtful Accounts	Trade Accounts Receivable and the Allowance for Doubtful Accounts We evaluate the collectability of trade accounts receivable based on a combination of factors. We estimate an allowance for doubtful accounts as a percentage of net sales based on various factors, including historical experience, current economic conditions and future expected credit losses and collectability trends. We will periodically adjust this estimate when we become aware of a specific customer’s inability to meet its financial obligations (e.g., bankruptcy filing) or as a result of changes in the overall aging of accounts receivable. While we have a large customer base that is geographically dispersed, a general economic downturn in any of the industry segments in which we operate could result in higher than expected defaults and, therefore, the need to revise estimates for bad debts. We have limited exposure from credit losses to any particular customer, region, or industry segment. We perform periodic credit evaluations of our customers’ financial condition and generally do not require collateral.
Merchandise Inventories, Including Consideration Received From Vendors	Merchandise Inventories, Including Consideration Received From Vendors Merchandise inventories are valued at the lower of cost or either market value or net realizable value, as applicable. Cost is determined by the last-in, first-out ("LIFO") method for a majority of U.S. automotive and industrial parts, and generally by the weighted average method for non-U.S. and certain other inventories. If the FIFO method had been used in place of LIFO, the carrying cost of inventory in the consolidated balance sheets would have been approximately $896 million and $880 million higher than reported at December 31, 2024 and 2023, respectively. Reductions in certain industrial parts inventories resulted in liquidations of LIFO inventory layers, which reduced cost of goods sold by immaterial amounts in 2024 and 2023. There were no liquidations of LIFO inventory layers in 2022. We identify slow moving or obsolete inventories and estimate appropriate provisions related thereto. Historically, these losses have not been significant as the vast majority of our inventories are not highly susceptible to obsolescence and are eligible for return under various vendor return programs. While we have no reason to believe our inventory return privileges will be discontinued in the future, our risk of loss associated with obsolete or slow moving inventories would increase if such were to occur. We enter into agreements at the beginning of each year with many of our vendors that provide for inventory purchase incentives. Generally, we earn inventory purchase incentives upon achieving specified volume purchasing levels or other criteria. We accrue for the receipt of these incentives as part of our inventory cost based on cumulative purchases of inventory to date and projected inventory purchases through the end of the year. While management believes we will continue to receive consideration from vendors in 2025 and beyond, there can be no assurance that vendors will continue to provide comparable amounts of incentives in the future.
Prepaid Expenses and Other Current Assets	Prepaid Expenses and Other Current Assets Prepaid expenses and other current assets consist primarily of consideration receivable from vendors, prepaid expenses, income taxes and other miscellaneous receivables. Consideration receivable from vendors include rebates receivable for various vendor funding programs.
Goodwill	Goodwill We review our goodwill annually for impairment in the fourth quarter, or sooner if circumstances indicate that the carrying amount may exceed fair value. We test goodwill for impairment at the reporting unit level, which is an operating segment or a level below an operating segment (a component). A component is a reporting unit if the component constitutes a business for which discrete financial information and operating results are available and management regularly reviews that information. However, we aggregate two or more components of an operating segment into a single reporting unit if the components have similar economic characteristics and the other aggregation requirements are met. To review goodwill at a reporting unit for impairment, we generally elect to first assess qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount. Qualitative factors include adverse macroeconomic, industry or market conditions, cost factors, or financial performance. If we elect not to perform a qualitative assessment or conclude from our assessment of qualitative factors that it is more likely than not that the fair value of the reporting unit is less than its carrying amount, we must perform a quantitative test to evaluate goodwill impairment. To perform a quantitative test, we estimate the fair value of the reporting unit and compare that amount to the reporting unit's carrying value. We typically calculate the fair value by using a combination of a market approach and an income approach that is based on a discounted cash flow model. The assumptions used in the market approach generally include benchmark company market multiples and the assumptions used in the income approach generally include the projected cash flows of the reporting unit, which are based on projected revenue growth rates and EBITDA margins, the estimated weighted average cost of capital, working capital and terminal value. We use inputs and assumptions we believe are consistent with those a hypothetical marketplace participant would use. We recognize goodwill impairment (if any) as the excess of the reporting unit's carrying value over its fair value, not to exceed the total amount of goodwill allocated to the reporting unit.
Long-Lived Assets Other Than Goodwill	Long-Lived Assets Other Than Goodwill We assess our long-lived assets other than goodwill for impairment whenever facts and circumstances indicate that the carrying amount may not be fully recoverable. To analyze recoverability, we project undiscounted net future cash flows over the remaining life of such assets. If these projected cash flows are less than the carrying amount, an impairment would be recognized, resulting in a write-down of assets with a corresponding charge to earnings. Impairment losses, if any, are measured based upon the difference between the carrying amount and the fair value of the assets.
Other Assets	Other Assets Other assets consist primarily of cash surrender value of life insurance policies, equity method and other investments, guarantee fees receivable, and deferred compensation benefits.
Property, Plant, and Equipment	Property, Plant and Equipment Property, plant and equipment are carried at cost less accumulated depreciation. We capitalize software costs and classify them within property, plant, and equipment, with the associated depreciation reflected as depreciation expense. These software costs include the costs of developing or obtaining internal-use software, such as external direct costs of materials and services, payroll and benefits costs, interest costs, and costs to develop or obtain software that allows for access or conversion of historical data by new systems. We capitalize costs when the preliminary project stage is complete, management has authorized and committed to funding the software project, it is probable that the software project will be completed, and it is probable that the software will be used to perform the intended function. Cost capitalization ceases when the software project is substantially complete and ready for its intended use. Costs that are associated with the preliminary stage activities, training, maintenance and all other post-implementation stage activities are expensed as incurred. Depreciation is primarily determined on a straight-line basis over the following estimated useful lives of each asset: buildings, 10 to 40 years; machinery and equipment, 5 to 15 years; furniture and fixtures, 5 to 15 years; capitalized software, generally 3 to 5 years, but up to 20 years for strategic investments in enterprise resource planning and other core systems with low obsolescence risk; and the shorter of lease term or useful life for leasehold improvements.
Other Current Liabilities	Other Current Liabilities Other current liabilities consist primarily of current lease obligations, allowances for sales returns expected within the next year, accrued compensation, accrued income and other taxes, and other reserves for expenses incurred.
Other Long-Term Liabilities	Other Long-Term Liabilities Other long-term liabilities consist primarily of allowances for sales returns expected after the next year, guarantee obligations, accrued taxes and other non-current obligations.
Self-Insurance	Self-Insurance We are self-insured for the majority of our group health insurance costs. A reserve for claims incurred but not reported is developed by analyzing historical claims data provided by our claims administrators. These reserves are included in accrued expenses in the accompanying consolidated balance sheets as the expenses are expected to be paid within one year. Long-term insurance liabilities consist primarily of reserves for our workers’ compensation program. We carry high deductible policies for a majority of these liabilities. We record our reserves based on an analysis performed by an independent actuary. The analysis involves calculating loss development factors and applying them to reserves supplied by our insurance providers. While we believe the assumptions used in these calculations are appropriate, significant changes in actual experience or our assumptions could materially affect the worker’s compensation costs and reserves recorded.
Business Combinations	Business Combinations When we acquire businesses, we apply the acquisition method of accounting and recognize the identifiable assets acquired, the liabilities assumed, and any noncontrolling interests in an acquiree at their fair values on the acquisition date, which requires significant estimates and assumptions. Goodwill is measured as the excess of the fair value of the consideration transferred over the net of the acquisition date fair values of the identifiable assets acquired and liabilities assumed. The acquisition method requires us to record provisional amounts for any items for which the accounting is not complete at the end of a reporting period. We must complete the accounting during the measurement period, which cannot exceed one year. Adjustments made during the measurement period could have a material impact on our financial condition and results of operations. We typically measure customer relationships and other intangible assets using an income approach. Significant estimates and assumptions used in this approach include discount rates and certain assumptions that form the basis of the forecasted cash flows expected to be generated from the asset (e.g., future revenue growth rates and EBITDA Margin). If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, we could record impairment charges. In addition, we have estimated the economic lives of certain acquired tangible and intangible assets and these lives are used to calculate depreciation and amortization expense. If our estimates of the economic lives change, depreciation or amortization expenses could be increased or decreased, or the acquired asset could be impaired.
Legal and Asbestos Liabilities	Legal and Asbestos Liabilities We accrue for potential losses related to legal disputes, litigation, asbestos liability, and regulatory matters when it is probable (the future event or events are likely to occur) that we have incurred a loss and the amount of the loss can be reasonably estimated. The asbestos-related product liability amount reflects our reasonable estimate of losses based upon currently known facts. To calculate the liability, we estimate potential losses relating to pending claims and also estimate the likelihood of additional, similar claims being filed against us in the future. To estimate potential losses on claims that could be filed in the future, we consider claims pending against us, claim filing rates, the number of codefendants and the extent to which they share in settlements, and the amount of loss by claim type. The estimated losses for pending and potential future claims are calculated on a discounted basis using risk-free interest rates derived from market data about monetary assets with maturities comparable to those of the projected asbestos liability. We use an actuarial specialist to assist with measuring our asbestos liability.
Fair Value Measurements	Fair Value Measurements Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or liability. Additionally, ASC 820, Fair Value Measurements, defines levels within a hierarchy based upon observable and non-observable inputs. •Level 1- Observable inputs such as quoted prices in active markets; •Level 2- Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and •Level 3- Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions At December 31, 2024 and 2023, the fair value of our senior unsecured notes was approximately $4.1 billion and $3.7 billion, respectively, which are designated as Level 2 in the fair value hierarchy. Our valuation technique is based primarily on prices and other relevant information generated by observable transactions involving identical or comparable assets or liabilities. Derivative instruments are recognized in the consolidated balance sheets at fair value and are designated as Level 2 in the fair value hierarchy. They are valued using inputs other than quoted prices, such as foreign exchange rates and yield curves. Fair value measurements of non-financial assets and non-financial liabilities are primarily used in the impairment analyses of goodwill, other intangible assets, and long-lived assets. These involve fair value measurements on a nonrecurring basis using Level 3 inputs as defined in the fair value hierarchy. The carrying amounts reflected in the consolidated balance sheets for cash and cash equivalents, trade accounts receivable, and trade accounts payable approximate their respective fair values based on the short-term nature of these instruments. Fair value measurement using unobservable inputs is inherently uncertain, and the use of different methodologies or assumptions to determine the fair value instruments could result in a different fair value measurement at the reporting date. There have been no changes in the methodologies used during the periods presented.
Derivatives and Hedging	Derivatives and Hedging We are exposed to various risks arising from business operations and market conditions, including fluctuations in interest rates and certain foreign currencies. When deemed appropriate, we use derivative and non-derivative instruments as risk management tools to mitigate the potential impact of interest rate and foreign exchange rate risks. The objective of using these tools is to reduce fluctuations in our earnings, cash flows and net investments in certain foreign subsidiaries associated with changes in these rates. Derivative financial instruments are not used for trading or other speculative purposes. We have not historically incurred, and do not expect to incur in the future, any losses as a result of counterparty default related to derivative instruments. We formally document relationships between hedging instruments and hedged items, as well as the risk management objective and strategy for undertaking various hedge transactions. This process includes linking cash flow hedges to specific forecasted transactions or variability of cash flow to be paid. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the designated derivative and non-derivative instruments that are used in hedging transactions are highly effective in offsetting changes in the cash flows of the hedged items. When a designated instrument is determined not to be highly effective as a hedge or the underlying hedged transaction is no longer probable, hedge accounting is discontinued prospectively. Net Investment Hedges We have designated certain derivative instruments and a portion of our foreign currency denominated debt, a non-derivative financial instrument, as hedges of the foreign currency exchange rate exposure of our Euro-denominated net investment in a European subsidiary. We also designated certain derivative instruments as hedges of our CAD-denominated net investment in a Canadian subsidiary. We apply the spot method to assess the hedge effectiveness of the derivative instruments and this assessment for each instrument excludes the initial value related to the difference at contract inception between the foreign exchange spot rate and the forward rate (i.e., the forward points). The initial value of this excluded component is recognized as a reduction to interest expense in a systematic and rational manner over the term of the derivative instrument. All other changes in value for the net investment hedges are included in AOCL within foreign currency translation and would only be reclassified to earnings if the European or Canadian subsidiary were liquidated, or otherwise disposed. Upon settlement, the cash paid or received generally is reflected in investing activities in the statement of cash flows.
Shipping and Handling Costs	Shipping and Handling Costs Shipping and handling costs are classified as selling, administrative and other expenses in the accompanying consolidated statements of income and totaled approximately $381 million, $451 million, and $407 million, for the years ended December 31, 2024, 2023, and 2022, respectively.
Advertising Costs	Advertising Costs Advertising costs are expensed as incurred and totaled $237 million, $234 million, and $236 million in the years ended December 31, 2024, 2023, and 2022, respectively.
Accounting for Legal Costs	Accounting for Legal Costs We expense legal costs related to loss contingencies as they are incurred.
Share-Based Compensation	Share-Based Compensation We maintain various long-term incentive plans, which provide for the granting of stock options, stock appreciation rights ("SARs"), restricted stock, restricted stock units ("RSUs"), performance awards, dividend equivalents and other share-based awards. SARs represent a right to receive upon exercise an amount, payable in shares of common stock, equal to the excess, if any, of the fair market value of our common stock on the date of exercise over the base value of the grant. The terms of such SARs require net settlement in shares of common stock and do not provide for cash settlement. RSUs represent a contingent right to receive one share of our common stock at a future date. The majority of awards previously granted vest on a pro-rata basis for periods ranging from one to three years and are expensed accordingly on a straight-line basis. Forfeitures are accounted for as they occur. We issue new shares upon exercise or conversion of awards under these plans.
Income Taxes	Income Taxes We account for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statement carrying amount and the tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Deferred tax assets and liabilities are recorded net as noncurrent deferred income taxes. In addition, valuation allowances are recorded to reduce deferred tax assets to the amount that will more likely than not be realized. In making this determination, we consider all available positive and negative evidence including projected future taxable income, future reversals of existing temporary differences, recent financial operations and tax planning strategies. We recognize a tax benefit from uncertain tax positions when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits.
Net Income per Common Share	Net Income per Common Share Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the year. The computation of diluted net income per common share includes the dilutive effect of stock options, stock appreciation rights and nonvested restricted stock awards options. Options to purchase approximately 11 thousand, 3 thousand, and 4 thousand shares of common stock ranging from $72 - $179 per share were outstanding at December 31, 2024, 2023, and 2022, respectively. These options were excluded from the computation of diluted net income per common share because the options’ exercise prices were greater than the average market prices of common stock in each respective year.
Recent Accounting Pronouncements	Recent Accounting Pronouncements Changes to U.S. GAAP are established by the Financial Accounting Standards Board (“FASB”) in the form of Accounting Standards Updates (“ASU”) to the FASB Accounting Standards Codification (“ASC”). We consider the applicability and impact of all ASUs and any not listed below were assessed and determined to not be applicable or are expected to have an immaterial impact on our Consolidated Financial Statements. Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. This standard requires disclosure in the notes to financial statements, at each interim and annual reporting period, of specified information about certain costs and expenses including purchases of inventory, employee compensation, depreciation and intangible asset amortization included in each relevant expense caption. Also required is a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated. This guidance is effective for all public entities for fiscal years beginning after December 15, 2026, and interim periods beginning after December 15, 2027, and early adoption is permitted. This guidance should be applied either prospectively to financial statements issued after the effective date of this update or retrospectively to all prior periods presented in the financial statements. We are currently evaluating the impact of adopting this standard on our financial statements and disclosures. Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This standard requires disclosures of significant segment expenses that are regularly provided to the chief operating decision maker ("CODM") and included within each reported measure of segment profit or loss, an amount and description of other segment items by reportable segment, and all annual disclosures currently required by Topic 280 to be included in interim periods. This standard also requires disclosure of the title and position of the CODM. We adopted this standard effective December 31, 2024. Income Taxes (Topic 740): Improvements to Income Tax Disclosures In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The standard requires disclosure of specific categories in the rate reconciliation and additional information for reconciling items, income before tax expense disaggregated between domestic and foreign, income tax expense disaggregated by federal, state and foreign, as well as further information on income taxes paid. The guidance is effective for the year ended December 31, 2025, with early adoption permitted. The guidance should be applied on a prospective basis, with retrospective application permitted. We are currently evaluating the impact of adopting this standard on our financial statements and disclosures.
Segment Reporting	Our reportable segments consist of the Automotive Parts Group ("Automotive") and Industrial Parts Group ("Industrial"). Within the reportable segments, certain of our operating segments are aggregated since they have similar economic characteristics, products and services, type and class of customers, and distribution methods.
Pension and Other Postretirement Plans	Our defined benefit pension plans cover employees in the U.S., Canada, and Europe who meet eligibility requirements. The plan covering U.S. employees is noncontributory, and our U.S. qualified defined benefit plan was frozen as of December 31, 2013. No further benefits were provided after this date for additional credited service or earnings, and all participants became fully vested as of December 31, 2013. On April 29, 2024, our Board of Directors approved the termination of the frozen U.S. qualified defined benefit plan (pension plan), effective September 30, 2024. We intend to transfer the management and delivery of continuing benefits associated with the pension plan to a third-party insurance company. The pension plan settlement process involves several regulatory steps and approvals. Subject to completion of these steps and approvals, settlement is expected between late 2025 and early 2026. As part of the plan settlement process, pension plan participants not currently receiving payments will have the opportunity to select a single lump sum payment or an annuity from the insurance company that will pay and administer future benefit payments. Upon settlement, we expect to recognize a non-cash, pre-tax pension settlement charge in late 2025 or early 2026 equal to the actuarial losses accumulated in AOCI, which totaled approximately $735 million ($540 million, net of tax) as of December 31, 2024. The actual amount of the settlement charges will depend on the valuation of the pension obligation at the settlement date, which is dependent upon interest rates, the lump sum election rate, the cost to purchase annuities, U.S. pension plan asset returns, and other factors. Once settled, we will be fully relieved of all obligations under the U.S. pension plan. The Canadian plan is contributory, and benefits are based on career average compensation. Our funding policy is to contribute an amount equal to the minimum required contribution under applicable pension legislation. For the plans in the U.S. and Canada, we may increase our contribution above the minimum, if appropriate to our tax and cash position and the plans’ funded position. The European plans are funded in accordance with local regulations. We also sponsor supplemental retirement plans covering employees in the U.S. and Canada. We use a measurement date of December 31 for our pension and supplemental retirement plans. Several assumptions are used to determine the benefit obligations, plan assets, and net periodic income. Prior to December 31, 2024, the discount rate for the U.S. pension plan was calculated using a bond matching approach to select specific bonds that would satisfy the projected benefit payments. As a result of the decision to terminate the U.S. pension plan, as of December 31, 2024, the benefit obligation for the U.S. pension plan was determined based on the amount expected to be required to settle the obligations. Assumptions utilized included the portion of the obligations expected to be settled through elections of lump sum payments or annuities and the cost to purchase annuities, what are subject to change upon actual plan settlement. The discount rate for non U.S. plans are set by using Willis Towers Watson's RATE:Link model. For non-U.S. plans and the U.S. pension plan prior to December 31, 2024, this approach reflects yields available on high quality corporate bonds that would generate the cash flow necessary to pay the plan's benefits when due. The expected return on plan assets is based on a calculated market-related value of plan assets, where gains and losses on plan assets are amortized over a five year period and accumulate in other comprehensive income. Other non-investment unrecognized gains and losses are amortized in future net income based on a “corridor” approach, where the corridor is equal to 10% of the greater of the benefit obligation or the market-related value of plan assets at the beginning of the year. The unrecognized gains and losses in excess of the corridor criteria are amortized over the average future lifetime or service of plan participants, depending on the plan. These assumptions are updated at each annual measurement date. Our benefit plan committees in the U.S. and Canada establish investment policies and strategies and regularly monitor the performance of the funds. Our U.S. plan, our largest pension plan, is well-funded, with a funded status of 128% at December 31, 2024. The plans in Europe are unfunded and, therefore, there are no plan assets. Beginning in 2024, the U.S. pension plan strategy implemented by our management is to minimize funded status volatility through the plan termination process. Our investment strategy with respect to U.S. pension plan assets is to fully hedge plan obligations on a termination basis. In connection with the planned U.S. pension plan termination process, we acquired certain guaranteed annuity contracts from an insurance company using existing plan assets to fund on-going obligations under the U.S. pension plan prior to our planned termination. The Canadian pension plan strategy implemented by our management is to achieve long-term objectives and invest the pension assets in accordance with the applicable pension legislation in Canada as well as fiduciary standards. The long-term primary investment objectives for the Canadian pension plan is to provide for a reasonable amount of long-term growth of capital, without undue exposure to risk, protect the assets from erosion of purchasing power, and provide investment results that meet or exceed the pension plans’ actuarially assumed long-term rates of return. The Company's Investment Strategy with respect to Canadian pension plan assets is to generate a return in excess of the passive portfolio benchmark (50% Equity, 40% Fixed Income, 10% Other). The fair values of the plan assets as of December 31, 2024 and 2023, by asset category, are shown in the tables below. Various inputs are considered when determining the value of our pension plan assets. The inputs or methodologies used for valuing securities are not necessarily an indication of the risk associated with investing in these securities. Level 1 represents observable market inputs that are unadjusted quoted prices for identical assets or liabilities in active markets. Level 2 represents other significant observable inputs (including quoted prices for similar securities, interest rates, credit risk, etc.). Level 3 represents significant unobservable inputs (including our own assumptions in determining the fair value of investments). Certain investments are measured at fair value using the net asset value ("NAV") per share as a practical expedient and have not been classified in the fair value hierarchy. The valuation methods may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Equity securities are valued at the closing price reported on the active market on which the individual securities are traded on the last day of the calendar plan year. Debt securities including corporate bonds, U.S. Government securities, and asset-backed securities are valued using price evaluations reflecting the bid and/or ask sides of the market for an investment as of the last day of the calendar plan year. The guaranteed annuity contract was valued based on the transaction price adjusted for changes in interest rates and actual benefit payments. Based on the investment policy for the pension plans, as well as an asset study that was performed based on our asset allocations and future expectations, our expected rate of return on plan assets for measuring 2025 pension income is 5.33% for the plans. The asset study forecasted expected rates of return for the approximate duration of our benefit obligations, using capital market data and historical relationships. We have one defined contribution plan in the U.S. that covers substantially all of our domestic employees. Employees receive a matching contribution of 100% of the first 5% of the employees’ salary.
Consolidation, Variable Interest Entity	We guarantee the borrowings of certain independently controlled automotive parts stores and businesses (“independents”) and certain other affiliates in which we have a noncontrolling equity ownership interest (“affiliates”). Presently, the independents are generally consolidated by unaffiliated enterprises that have controlling financial interests through ownership of a majority voting interest in the independents. We have no voting interest or equity conversion rights in any of the independents. We do not control the independents or the affiliates but receive a fee for the guarantees. We have concluded that the independents are variable interest entities, but that we are not the primary beneficiary. Specifically, the equity holders of the independents have the power to direct the activities that most significantly impact the entities’ economic performance including, but not limited to, decisions about hiring and terminating personnel, local marketing and promotional initiatives, pricing and selling activities, credit decisions, monitoring and maintaining appropriate inventories, and store hours. Separately, we concluded that the affiliates are not variable interest entities. During the year ended December 31, 2024, we acquired all of the remaining affiliates, which are consolidated in our financial statements. Our maximum exposure to loss as a result of its involvement with these independents and affiliates is generally equal to the total borrowings subject to our guarantees. While such borrowings of the independents and affiliates are outstanding, we are required to maintain compliance with certain covenants. At December 31, 2024, we were in compliance with all such covenants. As of December 31, 2024, there are no material guaranteed loans for which the borrower is experiencing financial difficulty and recovery is expected to be provided substantially through the operation or sale of the collateral.

Summary of Significant Accounting Policies (Policies)

12 Months Ended

Dec. 31, 2024

Genuine Parts Company is a distributor of automotive replacement parts and industrial parts and materials. We serve a diverse customer base through a network of more than 10,700 locations throughout North America, Europe, and Australasia.

Principles of Consolidation

The consolidated financial statements include all of our accounts. The net income attributable to noncontrolling interests is not material to our consolidated net income. Intercompany accounts and transactions have been eliminated in consolidation.

Reclassifications

Certain prior year amounts are reclassified to conform to the current year presentation. These reclassifications had no impact on our previously reported total assets, total liabilities, results of operations, comprehensive income or net cash flows from operating, financing or investing activities.

We have evaluated subsequent events through the date the financial statements were issued.

Use of Estimates

The preparation of the consolidated financial statements, in conformity with U.S. generally accepted accounting principles, requires management to make estimates and assumptions that affect the amounts reported in the consolidated financial statements and accompanying notes. Actual results may differ from those estimates and the differences could be material.

Revenue Recognition

We recognize revenue at the point the customer obtains control of the products or services and at an amount that reflects the consideration expected to be received for those products or services.

Revenue is recognized net of allowances for returns, variable consideration and any taxes collected from customers that will be remitted to governmental authorities. Revenue recognized over time is not significant. Payment terms with customers vary by the type and location of the customer and the products or services offered. We do not adjust the promised amount of consideration for the effects of significant financing components based on the expectation that the period between when we transfer a promised good or service to a customer and when the customer pays for that good or service will be one year or less. Arrangements with customers that include payment terms extending beyond one year are not significant. Liabilities for customer incentives, discounts, sales returns or rebates are included in other current liabilities in the consolidated balance sheets.

Product Distribution Revenues

We generate revenue primarily by distributing products through wholesale and, to a lesser extent, retail channels. For wholesale customers, revenue is recognized when title and control of the goods has passed to the wholesale customer. Retail revenue is recognized at the point of sale when the goods are transferred to customers and consideration is received. Certain shipping and handling activities may be performed prior to the customer obtaining control of the products. Costs associated with shipping and handling to our customers are considered costs to fulfill a contract and are included in selling, administrative and other expenses in the period they are incurred.

Other Revenues

We offer software support, product cataloging, marketing, training and other membership program and support services to certain customers. This revenue is recognized as services are performed. Revenue from these services is recognized over a short duration and the impact to our consolidated financial statements is not significant.

Variable Consideration

Our products are generally sold with a right of return and may include variable consideration in the form of incentives, discounts, credits or rebates. We estimate variable consideration based on historical experience to determine the expected amount to which we will be entitled in exchange for transferring the promised goods or services to a customer. We recognize estimated variable consideration as an adjustment to the transaction price

when control of the related product or service is transferred. The realization of variable consideration occurs within a short period of time from product delivery; therefore, the time value of money effect is not significant.

Foreign Currency Translation

The consolidated balance sheets and statements of income of our foreign subsidiaries have been translated into U.S. dollars at the current and average exchange rates, respectively. The foreign currency translation adjustment is included as a component of accumulated other comprehensive loss.

Cash and Cash Equivalents

We consider all highly liquid investments with original maturities of three months or less when purchased to be cash equivalents.

Trade Accounts Receivable and the Allowance for Doubtful Accounts

We evaluate the collectability of trade accounts receivable based on a combination of factors. We estimate an allowance for doubtful accounts as a percentage of net sales based on various factors, including historical experience, current economic conditions and future expected credit losses and collectability trends. We will periodically adjust this estimate when we become aware of a specific customer’s inability to meet its financial obligations (e.g., bankruptcy filing) or as a result of changes in the overall aging of accounts receivable. While we have a large customer base that is geographically dispersed, a general economic downturn in any of the industry segments in which we operate could result in higher than expected defaults and, therefore, the need to revise estimates for bad debts. We have limited exposure from credit losses to any particular customer, region, or industry segment. We perform periodic credit evaluations of our customers’ financial condition and generally do not require collateral.

Merchandise Inventories, Including Consideration Received From Vendors

Merchandise inventories are valued at the lower of cost or either market value or net realizable value, as applicable. Cost is determined by the last-in, first-out ("LIFO") method for a majority of U.S. automotive and industrial parts, and generally by the weighted average method for non-U.S. and certain other inventories. If the FIFO method had been used in place of LIFO, the carrying cost of inventory in the consolidated balance sheets would have been approximately $896 million and $880 million higher than reported at December 31, 2024 and 2023, respectively. Reductions in certain industrial parts inventories resulted in liquidations of LIFO inventory layers, which reduced cost of goods sold by immaterial amounts in 2024 and 2023. There were no liquidations of LIFO inventory layers in 2022.

We identify slow moving or obsolete inventories and estimate appropriate provisions related thereto. Historically, these losses have not been significant as the vast majority of our inventories are not highly susceptible to obsolescence and are eligible for return under various vendor return programs. While we have no reason to believe our inventory return privileges will be discontinued in the future, our risk of loss associated with obsolete or slow moving inventories would increase if such were to occur.

We enter into agreements at the beginning of each year with many of our vendors that provide for inventory purchase incentives. Generally, we earn inventory purchase incentives upon achieving specified volume purchasing levels or other criteria. We accrue for the receipt of these incentives as part of our inventory cost based on cumulative purchases of inventory to date and projected inventory purchases through the end of the year. While management believes we will continue to receive consideration from vendors in 2025 and beyond, there can be no assurance that vendors will continue to provide comparable amounts of incentives in the future.

Prepaid Expenses and Other Current Assets

Prepaid expenses and other current assets consist primarily of consideration receivable from vendors, prepaid expenses, income taxes and other miscellaneous receivables.

Consideration receivable from vendors include rebates receivable for various vendor funding programs.

Goodwill

We review our goodwill annually for impairment in the fourth quarter, or sooner if circumstances indicate that the carrying amount may exceed fair value. We test goodwill for impairment at the reporting unit level, which is an operating segment or a level below an operating segment (a component). A component is a reporting unit if the component constitutes a business for which discrete financial information and operating results are available and management regularly reviews that information. However, we aggregate two or more components of an operating segment into a single reporting unit if the components have similar economic characteristics and the other aggregation requirements are met.

To review goodwill at a reporting unit for impairment, we generally elect to first assess qualitative factors to determine whether it is more likely than not that the fair value of the reporting unit is less than its carrying amount. Qualitative factors include adverse macroeconomic, industry or market conditions, cost factors, or financial performance. If we elect not to perform a qualitative assessment or conclude from our assessment of qualitative factors that it is more likely than not that the fair value of the reporting unit is less than its carrying amount, we must perform a quantitative test to evaluate goodwill impairment.

To perform a quantitative test, we estimate the fair value of the reporting unit and compare that amount to the reporting unit's carrying value. We typically calculate the fair value by using a combination of a market approach and an income approach that is based on a discounted cash flow model. The assumptions used in the market approach generally include benchmark company market multiples and the assumptions used in the income approach generally include the projected cash flows of the reporting unit, which are based on projected revenue growth rates and EBITDA margins, the estimated weighted average cost of capital, working capital and terminal value. We use inputs and assumptions we believe are consistent with those a hypothetical marketplace participant would use. We recognize goodwill impairment (if any) as the excess of the reporting unit's carrying value over its fair value, not to exceed the total amount of goodwill allocated to the reporting unit.

Long-Lived Assets Other Than Goodwill

We assess our long-lived assets other than goodwill for impairment whenever facts and circumstances indicate that the carrying amount may not be fully recoverable. To analyze recoverability, we project undiscounted net future cash flows over the remaining life of such assets. If these projected cash flows are less than the carrying amount, an impairment would be recognized, resulting in a write-down of assets with a corresponding charge to earnings. Impairment losses, if any, are measured based upon the difference between the carrying amount and the fair value of the assets.

Other Assets

Other assets consist primarily of cash surrender value of life insurance policies, equity method and other investments, guarantee fees receivable, and deferred compensation benefits.

Property, Plant, and Equipment

Property, Plant and Equipment

Property, plant and equipment are carried at cost less accumulated depreciation.

We capitalize software costs and classify them within property, plant, and equipment, with the associated depreciation reflected as depreciation expense. These software costs include the costs of developing or obtaining internal-use software, such as external direct costs of materials and services, payroll and benefits costs, interest costs, and costs to develop or obtain software that allows for access or conversion of historical data by new systems. We capitalize costs when the preliminary project stage is complete, management has authorized and committed to funding the software project, it is probable that the software project will be completed, and it is probable that the software will be used to perform the intended function. Cost capitalization ceases when the software project is substantially complete and ready for its intended use. Costs that are associated with the preliminary stage activities, training, maintenance and all other post-implementation stage activities are expensed as incurred.

Depreciation is primarily determined on a straight-line basis over the following estimated useful lives of each asset: buildings, 10 to 40 years; machinery and equipment, 5 to 15 years; furniture and fixtures, 5 to 15 years; capitalized software, generally 3 to 5 years, but up to 20 years for strategic investments in enterprise resource planning and other core systems with low obsolescence risk; and the shorter of lease term or useful life for leasehold improvements.

Other Current Liabilities

Other current liabilities consist primarily of current lease obligations, allowances for sales returns expected within the next year, accrued compensation, accrued income and other taxes, and other reserves for expenses incurred.

Other Long-Term Liabilities

Other long-term liabilities consist primarily of allowances for sales returns expected after the next year, guarantee obligations, accrued taxes and other non-current obligations.

Self-Insurance

We are self-insured for the majority of our group health insurance costs. A reserve for claims incurred but not reported is developed by analyzing historical claims data provided by our claims administrators. These reserves are included in accrued expenses in the accompanying consolidated balance sheets as the expenses are expected to be paid within one year.

Long-term insurance liabilities consist primarily of reserves for our workers’ compensation program. We carry high deductible policies for a majority of these liabilities. We record our reserves based on an analysis performed by an independent actuary. The analysis involves calculating loss development factors and applying them to reserves supplied by our insurance providers. While we believe the assumptions used in these calculations are appropriate, significant changes in actual experience or our assumptions could materially affect the worker’s compensation costs and reserves recorded.

Business Combinations

When we acquire businesses, we apply the acquisition method of accounting and recognize the identifiable assets acquired, the liabilities assumed, and any noncontrolling interests in an acquiree at their fair values on the acquisition date, which requires significant estimates and assumptions. Goodwill is measured as the excess of the fair value of the consideration transferred over the net of the acquisition date fair values of the identifiable assets acquired and liabilities assumed. The acquisition method requires us to record provisional amounts for any items for which the accounting is not complete at the end of a reporting period. We must complete the accounting during the measurement period, which cannot exceed one year. Adjustments made during the measurement period could have a material impact on our financial condition and results of operations.

We typically measure customer relationships and other intangible assets using an income approach. Significant estimates and assumptions used in this approach include discount rates and certain assumptions that form the basis of the forecasted cash flows expected to be generated from the asset (e.g., future revenue growth rates and EBITDA Margin). If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, we could record impairment charges. In addition, we have estimated the economic lives of certain acquired tangible and intangible assets and these lives are used to calculate depreciation and amortization expense. If our estimates of the economic lives change, depreciation or amortization expenses could be increased or decreased, or the acquired asset could be impaired.

Legal and Asbestos Liabilities

We accrue for potential losses related to legal disputes, litigation, asbestos liability, and regulatory matters when it is probable (the future event or events are likely to occur) that we have incurred a loss and the amount of the loss can be reasonably estimated.

The asbestos-related product liability amount reflects our reasonable estimate of losses based upon currently known facts. To calculate the liability, we estimate potential losses relating to pending claims and also estimate the likelihood of additional, similar claims being filed against us in the future. To estimate potential losses on claims that could be filed in the future, we consider claims pending against us, claim filing rates, the number of codefendants and the extent to which they share in settlements, and the amount of loss by claim type. The estimated losses for pending and potential future claims are calculated on a discounted basis using risk-free interest rates derived from market data about monetary assets with maturities comparable to those of the projected asbestos liability. We use an actuarial specialist to assist with measuring our asbestos liability.

Fair Value Measurements

Fair value is defined as an exit price, representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or liability. Additionally, ASC 820, Fair Value Measurements, defines levels within a hierarchy based upon observable and non-observable inputs.

•Level 1- Observable inputs such as quoted prices in active markets;

•Level 2- Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and

•Level 3- Unobservable inputs in which there is little or no market data, which require the reporting entity to develop its own assumptions

At December 31, 2024 and 2023, the fair value of our senior unsecured notes was approximately $4.1 billion and $3.7 billion, respectively, which are designated as Level 2 in the fair value hierarchy. Our valuation technique is based primarily on prices and other relevant information generated by observable transactions involving identical or comparable assets or liabilities.

Derivative instruments are recognized in the consolidated balance sheets at fair value and are designated as Level 2 in the fair value hierarchy. They are valued using inputs other than quoted prices, such as foreign exchange rates and yield curves.

Fair value measurements of non-financial assets and non-financial liabilities are primarily used in the impairment analyses of goodwill, other intangible assets, and long-lived assets. These involve fair value measurements on a nonrecurring basis using Level 3 inputs as defined in the fair value hierarchy. The carrying amounts reflected in the consolidated balance sheets for cash and cash equivalents, trade accounts receivable, and trade accounts payable approximate their respective fair values based on the short-term nature of these instruments.

Fair value measurement using unobservable inputs is inherently uncertain, and the use of different methodologies or assumptions to determine the fair value instruments could result in a different fair value measurement at the reporting date. There have been no changes in the methodologies used during the periods presented.

Derivatives and Hedging

We are exposed to various risks arising from business operations and market conditions, including fluctuations in interest rates and certain foreign currencies. When deemed appropriate, we use derivative and non-derivative instruments as risk management tools to mitigate the potential impact of interest rate and foreign exchange rate risks. The objective of using these tools is to reduce fluctuations in our earnings, cash flows and net investments in certain foreign subsidiaries associated with changes in these rates. Derivative financial instruments are not used for trading or other speculative purposes. We have not historically incurred, and do not expect to incur in the future, any losses as a result of counterparty default related to derivative instruments.

We formally document relationships between hedging instruments and hedged items, as well as the risk management objective and strategy for undertaking various hedge transactions. This process includes linking cash flow hedges to specific forecasted transactions or variability of cash flow to be paid. We also formally assess, both at the hedge’s inception and on an ongoing basis, whether the designated derivative and non-derivative instruments that are used in hedging transactions are highly effective in offsetting changes in the cash flows of the hedged items. When a designated instrument is determined not to be highly effective as a hedge or the underlying hedged transaction is no longer probable, hedge accounting is discontinued prospectively.

Net Investment Hedges

We have designated certain derivative instruments and a portion of our foreign currency denominated debt, a non-derivative financial instrument, as hedges of the foreign currency exchange rate exposure of our Euro-denominated net investment in a European subsidiary. We also designated certain derivative instruments as hedges of our CAD-denominated net investment in a Canadian subsidiary. We apply the spot method to assess the hedge effectiveness of the derivative instruments and this assessment for each instrument excludes the initial value related to the difference at contract inception between the foreign exchange spot rate and the forward rate (i.e., the forward points). The initial value of this excluded component is recognized as a reduction to interest expense in a systematic and rational manner over the term of the derivative instrument. All other changes in value for the net investment hedges are included in AOCL within foreign currency translation and would only be reclassified to earnings if the European or Canadian subsidiary were liquidated, or otherwise disposed. Upon settlement, the cash paid or received generally is reflected in investing activities in the statement of cash flows.

Shipping and Handling Costs

Shipping and handling costs are classified as selling, administrative and other expenses in the accompanying consolidated statements of income and totaled approximately $381 million, $451 million, and $407 million, for the years ended December 31, 2024, 2023, and 2022, respectively.

Advertising Costs

Advertising costs are expensed as incurred and totaled $237 million, $234 million, and $236 million in the years ended December 31, 2024, 2023, and 2022, respectively.

Accounting for Legal Costs

We expense legal costs related to loss contingencies as they are incurred.

Share-Based Compensation

We maintain various long-term incentive plans, which provide for the granting of stock options, stock appreciation rights ("SARs"), restricted stock, restricted stock units ("RSUs"), performance awards, dividend equivalents and other share-based awards. SARs represent a right to receive upon exercise an amount, payable in shares of common stock, equal to the excess, if any, of the fair market value of our common stock on the date of exercise over the base value of the grant. The terms of such SARs require net settlement in shares of common stock and do not provide for cash settlement. RSUs represent a contingent right to receive one share of our common stock at a future date. The majority of awards previously granted vest on a pro-rata basis for periods ranging from one to three years and are expensed accordingly on a straight-line basis. Forfeitures are accounted for as they occur. We issue new shares upon exercise or conversion of awards under these plans.

Income Taxes

We account for income taxes under the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on the differences between the financial statement carrying amount and the tax basis of assets and liabilities using enacted tax rates in effect for the year in which the differences are expected to reverse. Deferred tax assets and liabilities are recorded net as noncurrent deferred income taxes. In addition, valuation allowances are recorded to reduce deferred tax assets to the amount that will more likely than not be realized. In making this determination, we consider all available positive and negative evidence including projected future taxable income, future reversals of existing temporary differences, recent financial operations and tax planning strategies.

We recognize a tax benefit from uncertain tax positions when it is more likely than not that the position will be sustained upon examination, including resolutions of any related appeals or litigation processes, based on the technical merits.

Net Income per Common Share

Basic net income per common share is computed by dividing net income by the weighted average number of common shares outstanding during the year. The computation of diluted net income per common share includes the dilutive effect of stock options, stock appreciation rights and nonvested restricted stock awards options. Options to purchase approximately 11 thousand, 3 thousand, and 4 thousand shares of common stock ranging from $72 - $179 per share were outstanding at December 31, 2024, 2023, and 2022, respectively. These options were excluded from the computation of diluted net income per common share because the options’ exercise prices were greater than the average market prices of common stock in each respective year.

Recent Accounting Pronouncements

Changes to U.S. GAAP are established by the Financial Accounting Standards Board (“FASB”) in the form of Accounting Standards Updates (“ASU”) to the FASB Accounting Standards Codification (“ASC”). We consider the applicability and impact of all ASUs and any not listed below were assessed and determined to not be applicable or are expected to have an immaterial impact on our Consolidated Financial Statements.

Income Statement—Reporting Comprehensive Income—Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses

In November 2024, the FASB issued ASU 2024-03, Income Statement - Reporting Comprehensive Income - Expense Disaggregation Disclosures (Subtopic 220-40): Disaggregation of Income Statement Expenses. This standard requires disclosure in the notes to financial statements, at each interim and annual reporting period, of specified information about certain costs and expenses including purchases of inventory, employee compensation, depreciation and intangible asset amortization included in each relevant expense caption. Also required is a qualitative description of the amounts remaining in relevant expense captions that are not separately disaggregated. This guidance is effective for all public entities for fiscal years beginning after December 15, 2026, and interim periods beginning after December 15, 2027, and early adoption is permitted. This guidance should be applied either prospectively to financial statements issued after the effective date of this update or retrospectively to all prior periods presented in the financial statements. We are currently evaluating the impact of adopting this standard on our financial statements and disclosures.

Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures

In November 2023, the FASB issued ASU 2023-07, Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures. This standard requires disclosures of significant segment expenses that are regularly provided to the chief operating decision maker ("CODM") and included within each reported measure of segment profit or loss, an amount and description of other segment items by reportable segment, and all annual disclosures currently required by Topic 280 to be included in interim periods. This standard also requires disclosure of the title and position of the CODM. We adopted this standard effective December 31, 2024.

Income Taxes (Topic 740): Improvements to Income Tax Disclosures

In December 2023, the FASB issued ASU 2023-09, Income Taxes (Topic 740): Improvements to Income Tax Disclosures. The standard requires disclosure of specific categories in the rate reconciliation and additional information for reconciling items, income before tax expense disaggregated between domestic and foreign, income tax expense disaggregated by federal, state and foreign, as well as further information on income taxes paid. The guidance is effective for the year ended December 31, 2025, with early adoption permitted. The guidance should be applied on a prospective basis, with retrospective application permitted. We are currently evaluating the impact of adopting this standard on our financial statements and disclosures.

Segment Reporting

Our reportable segments consist of the Automotive Parts Group ("Automotive") and Industrial Parts Group ("Industrial"). Within the reportable segments, certain of our operating segments are aggregated since they have similar economic characteristics, products and services, type and class of customers, and distribution methods.

Pension and Other Postretirement Plans

Our defined benefit pension plans cover employees in the U.S., Canada, and Europe who meet eligibility requirements. The plan covering U.S. employees is noncontributory, and our U.S. qualified defined benefit plan was frozen as of December 31, 2013. No further benefits were provided after this date for additional credited service or earnings, and all participants became fully vested as of December 31, 2013.

On April 29, 2024, our Board of Directors approved the termination of the frozen U.S. qualified defined benefit plan (pension plan), effective September 30, 2024. We intend to transfer the management and delivery of continuing benefits associated with the pension plan to a third-party insurance company. The pension plan settlement process involves several regulatory steps and approvals. Subject to completion of these steps and approvals, settlement is expected between late 2025 and early 2026. As part of the plan settlement process, pension plan participants not currently receiving payments will have the opportunity to select a single lump sum payment or an annuity from the insurance company that will pay and administer future benefit payments.

Upon settlement, we expect to recognize a non-cash, pre-tax pension settlement charge in late 2025 or early 2026 equal to the actuarial losses accumulated in AOCI, which totaled approximately $735 million ($540 million, net of tax) as of December 31, 2024. The actual amount of the settlement charges will depend on the valuation of the pension obligation at the settlement date, which is dependent upon interest rates, the lump sum election rate, the cost to purchase annuities, U.S. pension plan asset returns, and other factors. Once settled, we will be fully relieved of all obligations under the U.S. pension plan.

The Canadian plan is contributory, and benefits are based on career average compensation. Our funding policy is to contribute an amount equal to the minimum required contribution under applicable pension legislation. For the plans in the U.S. and Canada, we may increase our contribution above the minimum, if appropriate to our tax and cash position and the plans’ funded position. The European plans are funded in accordance with local regulations.

We also sponsor supplemental retirement plans covering employees in the U.S. and Canada. We use a measurement date of December 31 for our pension and supplemental retirement plans.

Several assumptions are used to determine the benefit obligations, plan assets, and net periodic income. Prior to December 31, 2024, the discount rate for the U.S. pension plan was calculated using a bond matching approach to select specific bonds that would satisfy the projected benefit payments. As a result of the decision to terminate the U.S. pension plan, as of December 31, 2024, the benefit obligation for the U.S. pension plan was determined based on the amount expected to be required to settle the obligations. Assumptions utilized included the portion of the obligations expected to be settled through elections of lump sum payments or annuities and the cost to purchase annuities, what are subject to change upon actual plan settlement.

The discount rate for non U.S. plans are set by using Willis Towers Watson's RATE:Link model. For non-U.S. plans and the U.S. pension plan prior to December 31, 2024, this approach reflects yields available on high quality corporate bonds that would generate the cash flow necessary to pay the plan's benefits when due. The expected return on plan assets is based on a calculated market-related value of plan assets, where gains and losses on plan assets are amortized over a five year period and accumulate in other comprehensive income. Other non-investment unrecognized gains and losses are amortized in future net income based on a “corridor” approach, where the corridor is equal to 10% of the greater of the benefit obligation or the market-related value of plan assets at the beginning of the year. The unrecognized gains and losses in excess of the corridor criteria are amortized over the average future lifetime or service of plan participants, depending on the plan. These assumptions are updated at each annual measurement date.

Our benefit plan committees in the U.S. and Canada establish investment policies and strategies and regularly monitor the performance of the funds. Our U.S. plan, our largest pension plan, is well-funded, with a funded status of 128% at December 31, 2024. The plans in Europe are unfunded and, therefore, there are no plan assets. Beginning in 2024, the U.S. pension plan strategy implemented by our management is to minimize funded status volatility through the plan termination process. Our investment strategy with respect to U.S. pension plan assets is to fully hedge plan obligations on a termination basis. In connection with the planned U.S. pension plan termination process, we acquired certain guaranteed annuity contracts from an insurance company using existing plan assets to fund on-going obligations under the U.S. pension plan prior to our planned termination.

The Canadian pension plan strategy implemented by our management is to achieve long-term objectives and invest the pension assets in accordance with the applicable pension legislation in Canada as well as fiduciary standards. The long-term primary investment objectives for the Canadian pension plan is to provide for a reasonable amount of long-term growth of capital, without undue exposure to risk, protect the assets from erosion of purchasing power, and provide investment results that meet or exceed the pension plans’ actuarially assumed long-term rates of return. The Company's Investment Strategy with respect to Canadian pension plan assets is to generate a return in excess of the passive portfolio benchmark (50% Equity, 40% Fixed Income, 10% Other).

The fair values of the plan assets as of December 31, 2024 and 2023, by asset category, are shown in the tables below. Various inputs are considered when determining the value of our pension plan assets. The inputs or methodologies used for valuing securities are not necessarily an indication of the risk associated with investing in these securities. Level 1 represents observable market inputs that are unadjusted quoted prices for identical assets or liabilities in active markets. Level 2 represents other significant observable inputs (including quoted prices for similar securities, interest rates, credit risk, etc.). Level 3 represents significant unobservable inputs (including our own assumptions in determining the fair value of investments). Certain investments are measured at fair value using the net asset value ("NAV") per share as a practical expedient and have not been classified in the fair value hierarchy.

The valuation methods may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while we believe our valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Equity securities are valued at the closing price reported on the active market on which the individual securities are traded on the last day of the calendar plan year. Debt securities including corporate bonds, U.S. Government securities, and asset-backed securities are valued using price evaluations reflecting the bid and/or ask sides of the market for an investment as of the last day of the calendar plan year. The guaranteed annuity contract was valued based on the transaction price adjusted for changes in interest rates and actual benefit payments.

Based on the investment policy for the pension plans, as well as an asset study that was performed based on our asset allocations and future expectations, our expected rate of return on plan assets for measuring 2025 pension income is 5.33% for the plans. The asset study forecasted expected rates of return for the approximate duration of our benefit obligations, using capital market data and historical relationships.

We have one defined contribution plan in the U.S. that covers substantially all of our domestic employees. Employees receive a matching contribution of 100% of the first 5% of the employees’ salary.

Consolidation, Variable Interest Entity

We guarantee the borrowings of certain independently controlled automotive parts stores and businesses

(“independents”) and certain other affiliates in which we have a noncontrolling equity ownership interest (“affiliates”). Presently, the independents are generally consolidated by unaffiliated enterprises that have controlling financial interests through ownership of a majority voting interest in the independents. We have no voting interest or equity conversion rights in any of the independents. We do not control the independents or the affiliates but receive a fee for the guarantees. We have concluded that the independents are variable interest entities, but that we are not the primary beneficiary. Specifically, the equity holders of the independents have the power to direct the activities that most significantly impact the entities’ economic performance including, but not limited to, decisions about hiring and terminating personnel, local marketing and promotional initiatives, pricing and selling activities, credit decisions, monitoring and maintaining appropriate inventories, and store hours. Separately, we concluded that the affiliates are not variable interest entities. During the year ended December 31, 2024, we acquired all of the remaining affiliates, which are consolidated in our financial statements. Our maximum exposure to loss as a result of its involvement with these independents and affiliates is generally equal to the total borrowings subject to our guarantees. While such borrowings of the independents and affiliates are outstanding, we are required to maintain compliance with certain covenants. At December 31, 2024, we were in compliance with all such covenants.

As of December 31, 2024, there are no material guaranteed loans for which the borrower is experiencing financial difficulty and recovery is expected to be provided substantially through the operation or sale of the collateral.