CONSOLIDATED INCOME STATEMENTS (Unaudited) - USD ($) shares in Millions, $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Income Statement | ||||
| Revenue | $ 3,574 | $ 3,701 | $ 6,997 | $ 7,382 |
| Expense | ||||
| Labor and Fringe | 791 | 766 | 1,612 | 1,571 |
| Purchased Services and Other | 710 | 691 | 1,484 | 1,411 |
| Depreciation and Amortization | 427 | 410 | 852 | 820 |
| Fuel | 269 | 301 | 544 | 626 |
| Equipment and Other Rents | 94 | 85 | 181 | 169 |
| Total Expense | 2,291 | 2,253 | 4,673 | 4,597 |
| Operating Income | 1,283 | 1,448 | 2,324 | 2,785 |
| Interest Expense | (212) | (209) | (421) | (419) |
| Other Income - Net | 22 | 28 | 48 | 69 |
| Earnings Before Income Taxes | 1,093 | 1,267 | 1,951 | 2,435 |
| Income Tax Expense | (264) | (304) | (476) | (592) |
| Net Earnings | $ 829 | $ 963 | $ 1,475 | $ 1,843 |
| Per Common Share (Note 2) | ||||
| Net Earnings Per Share, Basic (in dollars per share) | $ 0.44 | $ 0.50 | $ 0.79 | $ 0.94 |
| Net Earnings Per Share, Assuming Dilution (in dollars per share) | $ 0.44 | $ 0.49 | $ 0.78 | $ 0.94 |
| Average Shares Outstanding (in shares) | 1,867 | 1,944 | 1,878 | 1,951 |
| Average Shares Outstanding, Assuming Dilution (in shares) | 1,869 | 1,948 | 1,881 | 1,955 |
CONDENSED CONSOLIDATED COMPREHENSIVE INCOME STATEMENTS (Unaudited) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Statement of Comprehensive Income [Abstract] | ||||||
| Total Comprehensive Earnings (Note 10) | $ 832 | $ 651 | $ 966 | $ 886 | $ 1,483 | $ 1,852 |
CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Shareholders' Equity: | ||
| Common stock, par value (in dollars per share) | $ 1 | $ 1 |
CONSOLIDATED STATEMENTS OF CHANGES IN SHAREHOLDERS' EQUITY (Unaudited) (Parenthetical) - USD ($) $ in Millions |
3 Months Ended | |||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Dec. 31, 2024 |
Dec. 31, 2023 |
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| Common stock, dividends, per share, declared (in dollars per share) | $ 0.13 | $ 0.13 | $ 0.12 | $ 0.12 | ||
| Accumulated Other Comprehensive (Loss) Income | ||||||
| Associated tax of accumulated other comprehensive loss balances | $ 58 | $ 59 | $ 72 | $ 72 | $ 61 | $ 74 |
Nature of Operations and Significant Accounting Policies |
6 Months Ended |
|---|---|
Jun. 30, 2025 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Nature of Operations and Significant Accounting Policies | Nature of Operations and Significant Accounting Policies Background CSX Corporation together with its subsidiaries ("CSX" or the “Company”), based in Jacksonville, Florida, is one of the nation's leading transportation companies. The Company provides rail-based transportation services including traditional rail service, the transport of intermodal containers and trailers, as well as other transportation services such as rail-to-truck transfers and bulk commodity operations. CSX's principal operating subsidiary, CSX Transportation, Inc. (“CSXT”), provides an important link to the transportation supply chain through its approximately 20,000 route-mile rail network and serves major population centers in 26 states east of the Mississippi River, the District of Columbia and the Canadian provinces of Ontario and Quebec. The Company's intermodal business links customers to railroads via trucks and terminals. CSXT is also responsible for the Company's real estate sales, leasing, acquisition, and management and development activities, substantially all of which are focused on supporting railroad operations. Other entities In addition to CSXT, the Company’s subsidiaries include Quality Carriers, Inc. ("Quality Carriers"), CSX Intermodal Terminals, Inc. (“CSX Intermodal Terminals”), Total Distribution Services, Inc. (“TDSI”), Transflo Terminal Services, Inc. (“Transflo”), CSX Technology, Inc. (“CSX Technology”) and other subsidiaries. Quality Carriers is the largest provider of bulk liquid chemicals truck transportation in North America. CSX Intermodal Terminals owns and operates a system of intermodal terminals, predominantly in the eastern United States and also performs drayage services (the pickup and delivery of intermodal shipments) for certain customers. TDSI serves the automotive industry with distribution centers and storage locations. Transflo connects non-rail served customers to the many benefits of rail by transferring products from rail to trucks. The biggest Transflo markets are chemicals and agriculture, which includes shipments of plastics and ethanol. CSX Technology and other subsidiaries provide support services for the Company. NOTE 1. Nature of Operations and Significant Accounting Policies, continued Basis of Presentation In the opinion of management, the accompanying consolidated financial statements contain all normal, recurring adjustments necessary to fairly present the consolidated financial statements and accompanying notes. Where applicable, prior year information has been reclassified to conform to the current presentation. Pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), certain information and disclosures normally included in the notes to the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been omitted from these interim financial statements. CSX suggests that these financial statements be read in conjunction with the audited financial statements and the notes included in CSX's most recent annual report on Form 10-K as well as any subsequently filed current reports on Form 8-K. Fiscal Year The Company's fiscal periods are based upon the calendar year. Except as otherwise specified, references to “second quarter(s)” or “six months” indicate CSX's fiscal periods ending June 30, 2025, and June 30, 2024, and references to "year-end" indicate the fiscal year ended December 31, 2024. New Accounting Pronouncements In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures. This standard update requires additional interim and annual disclosures about a company’s income taxes, including more detailed information around the annual rate reconciliation and income taxes paid. The Company will adopt the guidance for its 2025 annual report filed on Form 10-K, which will result in additional disclosures related to income taxes but will not impact the Company's results of operations or financial position. In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses. This standard update requires additional disclosures about certain expenses in commonly presented expense captions. The Company is required to adopt the guidance for its 2027 annual report filed on Form 10-K, though early adoption is permitted. The Company is currently evaluating the impact of these amendments on its disclosures, but this standard update will not impact the Company's results of operations or financial position.
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Earnings Per Share |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Earnings Per Share | Earnings Per Share The following table sets forth the computation of basic earnings per share and earnings per share, assuming dilution.
Basic earnings per share is based on the weighted-average number of shares of common stock outstanding. Earnings per share, assuming dilution, is based on the weighted-average number of shares of common stock outstanding and common stock equivalents adjusted for the effects of common stock that may be issued as a result of potentially dilutive instruments. CSX's potentially dilutive instruments are made up of equity awards including employee stock options, performance units and restricted stock units. When calculating diluted earnings per share, the potential shares that would be outstanding if all outstanding stock options were exercised are included. This number is different from outstanding stock options because it is offset by shares CSX could repurchase using the proceeds from these hypothetical exercises to obtain the common stock equivalent. The total average outstanding stock options that were excluded from the diluted earnings per share calculation because their effect was antidilutive is in the table below.
NOTE 2. Earnings Per Share, continued Share Repurchases During fourth quarter 2023, the Company began repurchasing shares under the $5 billion share repurchase program approved in October 2023. Total repurchase authority remaining was $1.4 billion as of June 30, 2025. Share repurchases may be made through a variety of methods including, but not limited to, open market purchases, purchases pursuant to Rule 10b5-1 plans, accelerated share repurchases and negotiated block purchases. The timing of share repurchases depends upon management's assessment of marketplace conditions and other factors, and the program remains subject to the discretion of the Board of Directors. Future share repurchases are expected to be funded by cash on hand, cash generated from operations and debt issuances. Shares are retired immediately upon repurchase. In accordance with the Equity Topic in the Accounting Standards Codification ("ASC"), the excess of repurchase price over par value is recorded in retained earnings. During second quarters and six months ended June 30, 2025, and June 30, 2024, the Company engaged in the following repurchase activities:
The Inflation Reduction Act of 2022 imposes a nondeductible 1% excise tax on the net value of most share repurchases made after December 31, 2022. Excise tax commensurate with net share repurchases is reflected in equity and a corresponding liability for excise taxes payable is included in other current liabilities on the consolidated balance sheet. The cost of shares repurchased shown in the table above excludes the impact of this excise tax. Excise tax payments in second quarter 2025 relate to share repurchases in 2024. Excise taxes for 2023 repurchases were paid in fourth quarter 2024. Dividend Increase In February 2025, the Company's Board of Directors authorized an 8% increase in the quarterly cash dividend to $0.13 per common share effective March 2025.
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Stock Plans and Share-Based Compensation |
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| Share-Based Payment Arrangement [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Stock Plans and Share-Based Compensation | Stock Plans and Share-Based Compensation Under CSX's share-based compensation plans, awards consist of performance units, stock options and restricted stock units for management and stock grants for directors. Share-based compensation expense for awards under share-based compensation plans is measured using the fair value of the award on the grant date and is recognized on a straight-line basis over the service period of the respective award. Alternatively, expense is recognized upon death or over an accelerated service period for employees whose agreements allow for continued vesting upon retirement or separation. Forfeitures are recognized as they occur. Total pre-tax expense and income tax benefits associated with share-based compensation are shown in the table below. Income tax benefits include impacts from option exercises and the vesting of other equity awards.
Long-term Incentive Plan In February 2025, the Company granted the following awards under a new long-term incentive plan ("LTIP") for the years 2025 through 2027, which was adopted under the CSX 2019 Stock and Incentive Award Plan.
NOTE 3. Stock Plans and Share-Based Compensation, continued Performance Units Units vest approximately three years after grant. Payouts will be made in CSX common stock with a payout range for most participants between 0% and 200% of the target awards depending on Company performance against predetermined goals. Payouts for certain executive officers are subject to formulaic upward or downward adjustment by up to 20%, capped at an overall payout of 240%, based upon the Company's total shareholder return relative to specified comparable groups over the performance period. The fair values of performance units granted to certain executive officers were calculated using a Monte-Carlo simulation model. Measurement against goals related to both average annual operating income growth and Economic Profit, in each case adjusting for certain items as defined in the plan, will each comprise 50% of the payout. As defined under the plan, Economic Profit incentivizes strategic investments earning more than management's desired minimum required return and is calculated as CSX’s Gross Cash Earnings minus the Capital Charge on Gross Operating Assets. Stock Options Stock options were granted with ten-year terms and vest over three years in equal installments each year on the anniversary of the grant date. These awards are time-based and are not based upon attainment of performance goals. The fair values of stock option awards were determined at the grant date using the Black-Scholes valuation model. Restricted Stock Units The restricted stock units awarded vest over three years in equal installments each year on the anniversary of the grant date and are settled in CSX common stock on a one-for-one basis. These awards are time-based and are not based upon CSX's attainment of performance goals. Other Awards Awards are periodically granted outside of the annual LTIP program, subject to approval by the Board of Directors, Compensation and Talent Management Committee, or Chief Executive Officer ("CEO") as appropriate. Awards outside of the annual LTIP program were granted to certain management employees other than senior executives during the second quarter and six months ended June 30, 2025, and 2024, and were not material. For more information related to the Company's outstanding long-term incentive compensation, see CSX's most recent annual report on Form 10-K.
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Casualty, Environmental and Other Reserves |
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| Casualty, Environmental and Other Reserves | Casualty, Environmental and Other Reserves Personal injury and environmental reserves are considered critical accounting estimates due to the need for management judgment. Casualty, environmental and other reserves are provided for in the consolidated balance sheets as shown in the table below.
These liabilities are accrued when probable and reasonably estimable in accordance with the Contingencies Topic in the ASC. Actual settlements and claims received could differ, and final outcomes of these matters cannot be predicted with certainty. Considering the legal defenses currently available, the liabilities that have been recorded and other factors, it is the opinion of management that none of these items individually, when finally resolved, will have a material adverse effect on the Company's financial condition, results of operations or liquidity. Should a number of these items occur in the same period, however, their combined effect could be material in that particular period. Casualty Casualty reserves represent accruals for personal injury, occupational disease and occupational injury claims primarily related to railroad operations. The Company's self-insured retention amount for casualty claims is $100 million per occurrence as discussed at Note 5, Commitments and Contingencies. Currently, no individual claim is expected to exceed the self-insured retention amount. Personal Injury Personal injury reserves represent liabilities for employee work-related and third-party injuries. Work-related injuries for CSXT employees are primarily subject to the Federal Employers’ Liability Act (“FELA”). CSXT retains an independent actuary to assist management in assessing the value of personal injury claims. An analysis is performed by the actuary quarterly and is reviewed by management. This analysis did not result in a material adjustment to the personal injury reserve in the quarters or six months ended June 30, 2025, or June 30, 2024. NOTE 4. Casualty, Environmental and Other Reserves, continued Occupational Occupational reserves represent liabilities arising from allegations of exposure to certain materials in the workplace (such as solvents, soaps, chemicals and diesel fumes), past exposure to asbestos or allegations of chronic physical injuries resulting from work conditions (such as repetitive stress injuries). The Company retains an independent actuary to analyze the Company’s historical claim filings, settlement amounts, and dismissal rates to assist in determining future anticipated claim filing rates and average settlement values. This analysis is performed by the actuary and reviewed by management quarterly. The analysis did not result in a material adjustment to the occupational reserve in the quarters or six months ended June 30, 2025, or June 30, 2024. Environmental The Company is a party to various proceedings related to environmental issues, including administrative and judicial proceedings involving private parties and regulatory agencies. The Company has been identified as a potentially responsible party at approximately 230 environmentally impaired sites. Many of these are, or may be, subject to remedial action under the federal Comprehensive Environmental Response, Compensation and Liability Act of 1980 ("CERCLA"), also known as the Superfund Law, or similar state statutes. Most of these proceedings arose from environmental conditions on properties used for ongoing or discontinued railroad operations. A number of these proceedings, however, are based on allegations that the Company, or its predecessors, sent hazardous substances to facilities owned or operated by others for treatment, recycling or disposal. In addition, some of the Company's land holdings were leased to others for commercial or industrial uses that may have resulted in releases of hazardous substances or other regulated materials onto the property and could give rise to proceedings against the Company. In any such proceedings, the Company is subject to environmental clean-up and enforcement actions under the Superfund Law, as well as similar state laws that may impose joint and several liability for clean-up and enforcement costs on current and former owners and operators of a site without regard to fault or the legality of the original conduct. These costs could be substantial. The Company reviews its role with respect to each site identified at least quarterly. Based on management's review process, amounts have been recorded to cover contingent anticipated future environmental remediation costs with respect to each site to the extent such costs are reasonably estimable and probable. Payments related to these liabilities are expected to be made over the next several years. Environmental remediation costs are included in purchased services and other on the consolidated income statements. Currently, the Company does not possess sufficient information to reasonably estimate the amounts of additional liabilities, if any, on some sites until completion of future environmental studies. In addition, conditions that are currently unknown could, at any given location, result in additional exposure, the amount and materiality of which cannot presently be reasonably estimated. Based upon information currently available, however, the Company believes its environmental reserves accurately reflect the estimated cost of remedial actions currently required. Other Other reserves include liabilities for various claims, such as automobile, property, general liability, workers' compensation and longshoremen disability claims.
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Commitments and Contingencies |
6 Months Ended |
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Jun. 30, 2025 | |
| Commitments and Contingencies Disclosure [Abstract] | |
| Commitments and Contingencies | Commitments and Contingencies Insurance The Company maintains insurance programs with substantial limits for property damage, including resulting business interruption, as well as casualty claims, which includes third-party liability. A certain amount of risk is retained by the Company on each insurance program. Under its property insurance program, the Company retains all risk up to $200 million per occurrence for losses from floods and named windstorms and up to $175 million per occurrence for other property losses. For casualty claims, the Company retains all risk up to $100 million per occurrence. CSX purchases insurance coverage above its full self-retention amounts and it retains a percentage of risk at various layers as well. While the Company believes its insurance coverage is adequate, future claims could exceed existing insurance coverage or insurance may not continue to be available at commercially reasonable rates. Legal The Company is involved in litigation incidental to its business and is a party to a number of legal actions and claims, various governmental proceedings and private civil lawsuits, including, but not limited to, those related to fuel surcharge practices, tax matters, environmental and hazardous material exposure matters, FELA and labor claims by current or former employees, other personal injury or property claims and disputes and complaints involving certain transportation rates and charges. Some of the legal proceedings include claims for compensatory as well as punitive damages and others are, or are purported to be, class actions. While the final outcomes of these matters cannot be predicted with certainty, considering, among other things, the legal defenses available and liabilities that have been recorded along with applicable insurance, it is currently the opinion of management that none of these pending items is likely to have a material adverse effect on the Company's financial condition, results of operations or liquidity. An unexpected adverse resolution of one or more of these items, however, could have a material adverse effect on the Company's financial condition, results of operations or liquidity in that particular period. The Company is able to estimate a range of possible loss for certain matters for which a loss is reasonably possible in excess of reserves established. The Company has estimated this range to be $2 million to $64 million in the aggregate at June 30, 2025. This estimated aggregate range is based upon currently available information and is subject to significant judgment and a variety of assumptions. Accordingly, the Company's estimate will change from time to time, and actual losses may vary significantly from the current estimate. NOTE 5. Commitments and Contingencies, continued Fuel Surcharge Antitrust Litigation In May 2007, class action lawsuits were filed against CSXT and three other U.S.-based Class I railroads alleging that the defendants' fuel surcharge practices relating to contract and unregulated traffic resulted from an illegal conspiracy in violation of antitrust laws. The class action lawsuits were transferred to federal court in the District of Columbia for coordinated or consolidated pre-trial proceedings. In 2017, the District Court issued its decision denying class certification. On August 16, 2019, the U.S. Court of Appeals for the D.C. Circuit affirmed the District Court’s ruling. Although the class was not certified, individual shippers have since brought claims against the railroads, which were also transferred to federal court in the District of Columbia for pre-trial proceedings but before a different judge. In March 2024, the original case was reassigned to the judge in the later-filed case. The railroads filed motions for summary judgment on July 17, 2024, with the briefing completed in December 2024. The judge held a hearing on the railroads' summary judgment motions on June 18, 2025, and granted summary judgment in favor of the railroads on June 24, 2025, ordering the cases closed. The individual shippers have until July 24, 2025, to file a Notice of Appeal. Environmental CSXT is indemnifying Pharmacia LLC, formerly known as Monsanto Company, ("Pharmacia") for certain liabilities associated with real estate located in Kearny, New Jersey along the Lower Passaic River (the “Property”). The Property, which was formerly owned by Pharmacia, is now owned by CSXT. CSXT's indemnification and defense duties arise with respect to several matters. The U.S. Environmental Protection Agency ("EPA"), using its CERCLA authority, seeks the investigation and cleanup of hazardous substances in the 17-mile Lower Passaic River Study Area (the "Study Area”). CSXT, on behalf of Pharmacia, and a significant number of other potentially responsible parties are together conducting a Remedial Investigation and Feasibility Study of the Study Area pursuant to an Administrative Settlement Agreement and Order on Consent with the EPA. Pharmacia’s share of responsibility, indemnified by CSXT, for the investigation and cleanup costs of the Study Area may be determined through various mechanisms including (a) an allocation and settlement with EPA; (b) litigation brought by EPA against non-settling parties; or (c) litigation among the responsible parties. For the lower eight miles of the Study Area, EPA issued its Record of Decision detailing the agency’s mandated remedial process in March 2016. Occidental Chemical Corporation ("Occidental") performed the remedial design for the lower eight-mile portion of the Study Area pursuant to a consent order with EPA. EPA approved the design in May 2024. For the remaining upper nine miles of the Study Area, EPA selected an interim remedy in a Record of Decision dated September 28, 2021. On March 2, 2023, EPA issued an administrative order requiring Occidental to design the interim remedy for the upper nine miles of the Study Area. Potentially responsible parties, including Pharmacia, are participating in an EPA-directed allocation and settlement process to assign responsibility related to the lower river and the entire Study Area, respectively. CSXT participated in the EPA-directed allocation and settlement process on behalf of Pharmacia. NOTE 5. Commitments and Contingencies, continued On March 2, 2022, EPA issued a Notice Letter to Pharmacia, Occidental and eight other parties alleging they are liable under Section 107(a) of CERCLA for releases or threatened releases of hazardous substances and requesting each party, individually or collectively, submit good faith offers to EPA in connection with the entire Study Area. CSXT, on behalf of Pharmacia, responded to the Notice Letter and submitted a good faith offer to EPA on June 27, 2022, following meetings with a mediator from EPA’s Conflict Prevention and Resolution Center. On November 21, 2023, EPA notified the United States District Court for the District of New Jersey ("Court") that it intended to move to enter a Consent Decree ("CD") with a group of potentially responsible parties. On January 31, 2024, EPA filed a motion to enter a modified CD with 82 potentially responsible parties, not including Pharmacia, requiring payment of $150 million to resolve their liability with respect to the entire Study Area. On April 1, 2024, Occidental filed its opposition to EPA's motion to enter the CD. Several other non-settling parties, including Pharmacia, filed comments concerning (but not opposing) entry of the CD. On December 18, 2024, the Court entered and approved the CD, which is now under appeal. Negotiations with EPA and other parties to resolve Pharmacia's liability continue. CSXT is also defending and indemnifying Pharmacia with regard to the Property in litigation filed by Occidental, which is seeking to recover its past and future costs associated with the remediation of the entire Study Area. Alternatively, Occidental seeks to compel some, or all, of the defendants to participate in the remediation of the Study Area. Pharmacia is one of approximately 110 defendants in a federal lawsuit filed by Occidental on June 30, 2018, and one of 37 defendants in a federal lawsuit filed by Occidental on March 24, 2023. Both of these lawsuits are stayed pending resolution of the CD action. CSXT is also defending and indemnifying Pharmacia in a cooperative natural resource damages assessment process related to the Property. Based on currently available information, the Company does not believe its share of remediation costs as determined by the EPA-directed allocation with respect to the Property and the Study Area would be material to the Company's financial condition, results of operations or liquidity. See Note 4, Casualty, Environmental and Other Reserves, for additional information on the Company's environmental liabilities. Regulatory In October 2024, the Company received a subpoena from the Enforcement Division of the U.S. Securities and Exchange Commission ("SEC") requesting information relating to, among other things, the accounting restatement disclosed in the Company’s Form 10-Q for the quarterly period ended June 30, 2024, filed on August 5, 2024, with the SEC. The Company also responded to information requests by the SEC related to certain of the Company’s non-financial performance metrics. The Company received correspondence from the SEC on July 10, 2025, indicating that the agency had concluded its investigation and does not intend to recommend an enforcement action.
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Employee Benefit Plans |
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| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Employee Benefit Plans | Employee Benefit Plans The Company sponsors defined benefit pension plans principally for salaried, management personnel. All plans are closed to new participants. Independent actuaries compute the amounts of liabilities and expenses relating to these plans subject to the assumptions that the Company determines are appropriate based on historical trends, current market rates and future projections. These amounts are reviewed by management. Only the service cost component of net periodic benefit costs is included in labor and fringe expense on the consolidated income statement. All other components of net periodic benefit cost are included in other income - net.
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Debt and Credit Agreements |
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| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt and Credit Agreements | Debt and Credit Agreements Total activity related to long-term debt as of the end of second quarter 2025 is shown in the table below. For fair value information related to the Company's long-term debt, see Note 9, Fair Value Measurements.
Debt Issuance In March 2025, CSX issued $600 million of 5.05% notes due 2035. These notes are included in the consolidated balance sheets under long-term debt and may be redeemed by the Company at any time, subject to payment of certain make-whole premiums. The net proceeds will be used for general corporate purposes, which may include debt repayments, repurchases of CSX's common stock, capital investment and working capital requirements. Interest Rate Derivatives Fair Value Hedges In first quarter 2025, CSX entered into two fixed-to-floating interest rate swaps classified as fair value hedges. The swaps are designed to hedge 10 years of interest rate risk associated with market fluctuations attributable to the Secured Overnight Financing Rate ("SOFR") on a cumulative $250 million of fixed rate outstanding notes which are due in 2055. The cumulative fair value of these swaps, which is included in other long-term assets on the consolidated balance sheet, was an asset of $10 million as of June 30, 2025. CSX has seven other fixed-to-floating interest rate swaps classified as fair value hedges. The swaps are designed to hedge 10 years of interest rate risk associated with market fluctuations attributable to SOFR on a cumulative $1.1 billion of fixed rate outstanding notes which are due between 2033 and 2040. These swaps are comprised of two swaps entered during 2023 (“2023 swaps”) and five swaps entered during 2022 (“2022 swaps”). The cumulative fair value of the 2023 swaps was an asset of $15 million and $7 million as of June 30, 2025, and December 31, 2024, respectively, and is included in other long-term assets on the consolidated balance sheet. The cumulative fair value of the 2022 swaps was a liability of $92 million and $123 million as of June 30, 2025, and December 31, 2024, respectively, and is included in other long-term liabilities on the consolidated balance sheet. NOTE 7. Debt and Credit Agreements, continued The swaps expire between 2032 and 2035. If settled early, the remaining cumulative fair value adjustment to the hedged notes will be amortized over the remaining life of the associated notes. The cumulative adjustment to the hedged notes is included in long-term debt on the consolidated balance sheet as shown in the following table below.
Gains and losses resulting from changes in fair value of the interest rate swaps offset changes in the fair value of the hedged portion of the underlying debt with no gain or loss recognized due to hedge ineffectiveness. The difference in the net fixed-to-float interest settlement on the derivatives is recognized in interest expense and is summarized as follows.
Cash Flow Hedges The Company had forward starting interest rate swaps, designated as cash flow hedges in accordance with the Derivatives and Hedging Topic in the ASC, that had an aggregate notional value of $500 million at inception. These swaps were effected to hedge the benchmark interest rate associated with future interest payments related to the anticipated refinancing of $850 million of 3.25% notes due in 2027. In addition to previous partial settlements in 2022 and 2023, CSX executed a final settlement equal to $114 million of the $500 million aggregate notional value of the cash flow hedges in second quarter 2024, which resulted in CSX receiving a cash payment of $52 million included in other operating activities on the consolidated cash flow statement. As of June 30, 2025, and December 31, 2024, no unsettled aggregate notional value of these swaps remains and there is no related asset or liability. The unrealized gain associated with the settled portion of the swaps is recorded net of tax in accumulated other comprehensive income ("AOCI") on the consolidated balance sheet and will continue to be classified in AOCI until the associated debt instrument is issued in the future. The unrealized gain in AOCI will be recognized in earnings as an adjustment to interest expense over the same period during which the hedged transaction affects earnings. Prior to full settlement, unrealized gains related to the swaps were included in other comprehensive income as summarized in the table below.
See Note 9, Fair Value Measurements, and Note 10, Other Comprehensive Income (Loss), for additional information about the Company's swaps. NOTE 7. Debt and Credit Agreements, continued Credit Facility The Company has a $1.2 billion unsecured revolving credit facility backed by a diverse syndicate of banks. This facility allows same-day borrowings at floating interest rates, based on SOFR or an agreed-upon replacement reference rate, plus a spread that depends upon CSX's senior unsecured debt ratings. This facility expires in February 2028. As of June 30, 2025, the Company had no outstanding balances under this facility. Commitment fees and interest rates payable under the facility were similar to fees and rates available to comparably rated investment-grade borrowers. As of second quarter 2025, CSX was in compliance with all covenant requirements under this facility. Commercial Paper Under its commercial paper program, which is backed by the revolving credit facility, the Company may issue unsecured commercial paper notes up to a maximum aggregate principal amount of $1.0 billion outstanding at any one time. Proceeds from issuances of the notes are used for general corporate purposes. Issuances of commercial paper during the six months ended June 30, 2025, had maturities ranging from 7 to 14 days. At June 30, 2025, the Company had $75 million of commercial paper due under the program with a weighted average interest rate of 4.62%. Commercial paper is reported within other current liabilities on the consolidated balance sheets and issuances, net of repayments, are included in other financing activities on the statement of cash flows.
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Revenues |
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| Revenues | Revenues The Company’s revenues are primarily derived from the transportation of freight as performance obligations that arise from its contracts with customers are satisfied. The below table presents the Company’s revenues disaggregated by market as this best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Fuel surcharge revenue is included in the individual markets.
The Company’s accounts receivable - net consists of freight and non-freight receivables, reduced by an allowance for credit losses. Freight receivables include amounts earned, billed and unbilled, and currently due from customers for transportation-related services. Non-freight receivables include amounts, billed and unbilled, currently due related to government reimbursement receivables and other non-revenue receivables.
The Company maintains an allowance for expected credit losses to provide for the estimated amount of receivables that will not be collected. The allowance is based upon an assessment of risk characteristics, historical payment experience, and the age of outstanding receivables adjusted for forward-looking economic conditions as necessary. Credit losses recognized on the Company’s accounts receivable were not material in the second quarters or six months ended June 30, 2025, or 2024.
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Fair Value Measurements |
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| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Measurements | Fair Value Measurements Investments The Company's investment assets are carried at fair value on the consolidated balance sheet in accordance with the Fair Value Measurements and Disclosures Topic in the ASC. They are valued with assistance from a third-party trustee and consist of exchange-traded funds, corporate bonds, asset-backed securities, government securities, and short-term time deposits. The exchange-traded funds are valued at quoted market prices determined in an active market, which are Level 1 inputs. The corporate bonds, asset-backed securities and government securities are valued using broker quotes that utilize observable market inputs, which are Level 2 inputs. The carrying amounts of time deposits, which are reported in the consolidated balance sheet using Level 2 inputs, approximate fair value due to their short-term nature. Unrealized losses as of June 30, 2025, and June 30, 2024, were not material. The Company believes any impairment of investments held with gross unrealized losses to be temporary and not the result of credit risk. The Company's investment assets are carried at fair value on the consolidated balance sheets, within the line items short-term investments and other long-term assets, as summarized in the following table.
Total investments in debt securities of $163 million as of June 30, 2025, and $214 million as of December 31, 2024, had an amortized cost of $164 million and $218 million, respectively. These investments have the following maturities:
(a) Exchange-traded funds are excluded as there is no stated contractual maturity date. NOTE 9. Fair Value Measurements, continued Long-term Debt Long-term debt is reported at carrying amount on the consolidated balance sheets and is the Company's only financial instrument with a fair value significantly different from its carrying amount. The fair value of a company's debt is a measure of its current value under present market conditions, but does not impact the financial statements under current accounting rules. The majority of the Company's long-term debt is valued with assistance from a third party that utilizes closing transactions, market quotes or market values of comparable debt. For those instruments not valued by the third party, the fair value has been estimated by applying market rates of similar instruments to the scheduled contractual debt payments and maturities. These market rates are provided by the same third party. All of the inputs used to determine the fair value of the Company's long-term debt are Level 2 inputs. The fair value and carrying value of the Company's long-term debt is as follows:
Interest Rate Derivatives The Company’s fixed-to-floating swaps are carried at fair value, which is determined with assistance from a third party based upon pricing models using inputs observed from actively quoted markets. All of the inputs used to determine the fair value of the swaps are Level 2 inputs. The fair value of the Company’s fixed-to-floating interest rate swaps was an asset of $25 million and $7 million (for swaps entered in 2025 and 2023), and a liability of $92 million and $123 million (for swaps entered in 2022) as of June 30, 2025, and December 31, 2024, respectively. As of June 30, 2025, and December 31, 2024, the forward starting interest rate swap was fully settled and there is no related asset or liability. See Note 7, Debt and Credit Agreements, for further information.
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Other Comprehensive Income (Loss) |
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| Equity [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Other Comprehensive Income (Loss) | Other Comprehensive Income (Loss) Total comprehensive earnings represents all changes in shareholders' equity during a period, other than those resulting from investments by and distributions to shareholders (e.g. issuance of equity securities and dividends). Generally, for CSX, total comprehensive earnings equals net earnings plus or minus adjustments for pension and other post-retirement liabilities, derivative activity and other items. Total comprehensive earnings is presented net of tax and was $832 million and $966 million for second quarters 2025 and 2024, respectively, and $1.5 billion and $1.9 billion for the six months ended June 30, 2025 and 2024, respectively. AOCI represents the cumulative balance of other comprehensive income, net of tax, as of the balance sheet date. Changes in the AOCI balance by component are shown in the following table. Amounts reclassified in pension and other post-employment benefits to net earnings relate to the amortization of actuarial losses and are included in other income - net on the consolidated income statements. See Note 6, Employee Benefit Plans, for further information. Interest rate derivatives consist of forward starting interest rate swaps classified as cash flow hedges. See Note 7, Debt and Credit Agreements, for further information. Other primarily represents CSX's share of AOCI of equity method investees. Amounts reclassified in other to net earnings are included in purchased services and other or equipment and other rents on the consolidated income statements.
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Segment Reporting and Significant Expenses |
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| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting and Significant Expenses | Segment Reporting and Significant Expenses The Company has two operating segments: rail and trucking. Although the Company provides a breakdown of revenue by line of business, the overall financial and operational performance of the railroad is analyzed as one operating segment due to the integrated nature of the rail network. The Rail column in the table below includes the activities of all CSX entities other than the trucking company, Quality Carriers, and also includes the Company's equity in the net income of equity method investments. As the trucking segment is not material for separate disclosure as a reportable segment, the results of these operations are included as a reconciliation to the Company's consolidated results in the tables below. The Company's chief operating decision maker ("CODM") is its CEO. The CODM reviews information presented on a consolidated basis, accompanied by supplemental information about the trucking segment separately, for purposes of allocating resources and evaluating financial performance. The Company has determined that operating income is the key measure of segment profit or loss as this measure is the focus of the CODM in developing financial plans, including resource allocation, and evaluating actual financial performance against plan. The CODM regularly reviews operating results broken out by significant expense. NOTE 11. Segment Reporting and Significant Expenses, continued The tables below present information about the Company's significant expenses and the required reportable segment reconciliations for the quarters ended June 30, 2025, and June 30, 2024.
NOTE 11. Segment Reporting and Significant Expenses, continued The tables below present information about the Company's significant expenses and the required reportable segment reconciliations for the six months ended June 30, 2025, and June 30, 2024.
(a) Trucking revenue is comprised of revenue from Quality Carriers. Rail revenue represents revenue attributed to all CSX entities other than the trucking company, Quality Carriers. (b) Trucking expenses include labor and fringe, purchased services and other, depreciation and amortization, fuel, equipment and other rents, and gains/losses on property dispositions from the operations of Quality Carriers. Rail expenses represent expenses attributable to all CSX entities other than the trucking company, Quality Carriers. NOTE 11. Segment Reporting and Significant Expenses, continued Reconciliation of Segment Operating Income to Consolidated Earnings Before Income Taxes
Other Segment Disclosures Capital expenditures made by the rail segment were $766 million and $524 million, for the second quarters 2025 and 2024, respectively, and $1,457 million and $1,021 million, for the six months ended June 30, 2025, and June 30, 2024, respectively. The total of the rail segment's reportable assets was $42.7 billion and $42.6 billion as of June 30, 2025, and December 31, 2024, respectively, out of total consolidated assets of $42.9 billion and $42.8 billion for the respective periods. Non-rail assets include assets held by the trucking operating segment.
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Pay vs Performance Disclosure - USD ($) $ in Millions |
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Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
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| Pay vs Performance Disclosure | ||||||
| Net Earnings | $ 829 | $ 646 | $ 963 | $ 880 | $ 1,475 | $ 1,843 |
Insider Trading Arrangements |
3 Months Ended |
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Jun. 30, 2025 | |
| Trading Arrangements, by Individual | |
| Rule 10b5-1 Arrangement Adopted | false |
| Non-Rule 10b5-1 Arrangement Adopted | false |
| Rule 10b5-1 Arrangement Terminated | false |
| Non-Rule 10b5-1 Arrangement Terminated | false |
Nature of Operations and Significant Accounting Policies (Policies) |
6 Months Ended |
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Jun. 30, 2025 | |
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Basis of Presentation | Basis of Presentation In the opinion of management, the accompanying consolidated financial statements contain all normal, recurring adjustments necessary to fairly present the consolidated financial statements and accompanying notes. Where applicable, prior year information has been reclassified to conform to the current presentation. Pursuant to the rules and regulations of the Securities and Exchange Commission (“SEC”), certain information and disclosures normally included in the notes to the annual financial statements prepared in accordance with U.S. generally accepted accounting principles (“GAAP”) have been omitted from these interim financial statements. CSX suggests that these financial statements be read in conjunction with the audited financial statements and the notes included in CSX's most recent annual report on Form 10-K as well as any subsequently filed current reports on Form 8-K.
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| Fiscal Year | Fiscal Year The Company's fiscal periods are based upon the calendar year. Except as otherwise specified, references to “second quarter(s)” or “six months” indicate CSX's fiscal periods ending June 30, 2025, and June 30, 2024, and references to "year-end" indicate the fiscal year ended December 31, 2024.
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| New Accounting Pronouncements | New Accounting Pronouncements In December 2023, the FASB issued ASU 2023-09, Improvements to Income Tax Disclosures. This standard update requires additional interim and annual disclosures about a company’s income taxes, including more detailed information around the annual rate reconciliation and income taxes paid. The Company will adopt the guidance for its 2025 annual report filed on Form 10-K, which will result in additional disclosures related to income taxes but will not impact the Company's results of operations or financial position. In November 2024, the FASB issued ASU 2024-03, Disaggregation of Income Statement Expenses. This standard update requires additional disclosures about certain expenses in commonly presented expense captions. The Company is required to adopt the guidance for its 2027 annual report filed on Form 10-K, though early adoption is permitted. The Company is currently evaluating the impact of these amendments on its disclosures, but this standard update will not impact the Company's results of operations or financial position.
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| Stock Plans and Share-Based Compensation | Under CSX's share-based compensation plans, awards consist of performance units, stock options and restricted stock units for management and stock grants for directors. Share-based compensation expense for awards under share-based compensation plans is measured using the fair value of the award on the grant date and is recognized on a straight-line basis over the service period of the respective award. Alternatively, expense is recognized upon death or over an accelerated service period for employees whose agreements allow for continued vesting upon retirement or separation. Forfeitures are recognized as they occur. |
| Revenues | The Company maintains an allowance for expected credit losses to provide for the estimated amount of receivables that will not be collected. The allowance is based upon an assessment of risk characteristics, historical payment experience, and the age of outstanding receivables adjusted for forward-looking economic conditions as necessary. |
| Fair Value Measurements | Investments The Company's investment assets are carried at fair value on the consolidated balance sheet in accordance with the Fair Value Measurements and Disclosures Topic in the ASC. They are valued with assistance from a third-party trustee and consist of exchange-traded funds, corporate bonds, asset-backed securities, government securities, and short-term time deposits. The exchange-traded funds are valued at quoted market prices determined in an active market, which are Level 1 inputs. The corporate bonds, asset-backed securities and government securities are valued using broker quotes that utilize observable market inputs, which are Level 2 inputs. The carrying amounts of time deposits, which are reported in the consolidated balance sheet using Level 2 inputs, approximate fair value due to their short-term nature. Unrealized losses as of June 30, 2025, and June 30, 2024, were not material. The Company believes any impairment of investments held with gross unrealized losses to be temporary and not the result of credit risk. Long-term Debt Long-term debt is reported at carrying amount on the consolidated balance sheets and is the Company's only financial instrument with a fair value significantly different from its carrying amount. The fair value of a company's debt is a measure of its current value under present market conditions, but does not impact the financial statements under current accounting rules. The majority of the Company's long-term debt is valued with assistance from a third party that utilizes closing transactions, market quotes or market values of comparable debt. For those instruments not valued by the third party, the fair value has been estimated by applying market rates of similar instruments to the scheduled contractual debt payments and maturities. These market rates are provided by the same third party. All of the inputs used to determine the fair value of the Company's long-term debt are Level 2 inputs. Interest Rate Derivatives The Company’s fixed-to-floating swaps are carried at fair value, which is determined with assistance from a third party based upon pricing models using inputs observed from actively quoted markets. All of the inputs used to determine the fair value of the swaps are Level 2 inputs.
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Earnings Per Share (Tables) |
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| Earnings Per Share [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Computation of Basic Earnings Per Share, Assuming Dilution | The following table sets forth the computation of basic earnings per share and earnings per share, assuming dilution.
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| Schedule of Total Average Outstanding Stock Options Excluded from Diluted Earnings Per Share Calculation |
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| Schedule of Share Repurchase | During second quarters and six months ended June 30, 2025, and June 30, 2024, the Company engaged in the following repurchase activities:
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Stock Plans and Share-Based Compensation (Tables) |
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Jun. 30, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Share-Based Payment Arrangement [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Pre-tax Expense and Income Tax Benefits Associated with Share-Based Compensation | Total pre-tax expense and income tax benefits associated with share-based compensation are shown in the table below. Income tax benefits include impacts from option exercises and the vesting of other equity awards.
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| Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award | In February 2025, the Company granted the following awards under a new long-term incentive plan ("LTIP") for the years 2025 through 2027, which was adopted under the CSX 2019 Stock and Incentive Award Plan.
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Casualty, Environmental and Other Reserves (Tables) |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Casualty, Environmental and Other Reserves [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Casualty, Environmental and Other Reserves | Casualty, environmental and other reserves are provided for in the consolidated balance sheets as shown in the table below.
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Employee Benefit Plans (Tables) |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Retirement Benefits [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Components of Net Periodic Benefit Costs |
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Debt and Credit Agreements (Tables) |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jun. 30, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Debt Disclosure [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Activity Related to Long-Term Debt | Total activity related to long-term debt as of the end of second quarter 2025 is shown in the table below. For fair value information related to the Company's long-term debt, see Note 9, Fair Value Measurements.
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| Schedule of Interest Rate Derivatives | The cumulative adjustment to the hedged notes is included in long-term debt on the consolidated balance sheet as shown in the following table below.
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| Schedule of Interest Expense / Unrealized Amounts Related to Cash Flow Hedges | Prior to full settlement, unrealized gains related to the swaps were included in other comprehensive income as summarized in the table below.
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Revenues (Tables) |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Revenue from Contract with Customer [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Revenues Disaggregated by Lines of Business | The below table presents the Company’s revenues disaggregated by market as this best depicts how the nature, amount, timing and uncertainty of revenue and cash flows are affected by economic factors. Fuel surcharge revenue is included in the individual markets.
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| Schedule of Accounts Receivable, Net |
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Fair Value Measurements (Tables) |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Fair Value Disclosures [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Fair Value of Investment Assets | The Company's investment assets are carried at fair value on the consolidated balance sheets, within the line items short-term investments and other long-term assets, as summarized in the following table.
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| Schedule of Investment Maturities | These investments have the following maturities:
(a) Exchange-traded funds are excluded as there is no stated contractual maturity date.
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| Schedule of Fair Value and Carrying Value of Long-Term Debt | The fair value and carrying value of the Company's long-term debt is as follows:
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Other Comprehensive Income (Loss) (Tables) |
6 Months Ended | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2025 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Equity [Abstract] | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Changes in AOCI balance by Component |
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Segment Reporting and Significant Expenses (Tables) |
6 Months Ended | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Jun. 30, 2025 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Segment Reporting [Abstract] | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Schedule of Segment Reporting Information, by Segment | The tables below present information about the Company's significant expenses and the required reportable segment reconciliations for the quarters ended June 30, 2025, and June 30, 2024.
NOTE 11. Segment Reporting and Significant Expenses, continued The tables below present information about the Company's significant expenses and the required reportable segment reconciliations for the six months ended June 30, 2025, and June 30, 2024.
(a) Trucking revenue is comprised of revenue from Quality Carriers. Rail revenue represents revenue attributed to all CSX entities other than the trucking company, Quality Carriers. (b) Trucking expenses include labor and fringe, purchased services and other, depreciation and amortization, fuel, equipment and other rents, and gains/losses on property dispositions from the operations of Quality Carriers. Rail expenses represent expenses attributable to all CSX entities other than the trucking company, Quality Carriers.
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| Schedule of Reconciliation of Segment Operating Income | Reconciliation of Segment Operating Income to Consolidated Earnings Before Income Taxes
|
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Nature of Operations and Significant Accounting Policies (Details) mi in Thousands |
Jun. 30, 2025
state
mi
|
|---|---|
| Organization, Consolidation and Presentation of Financial Statements [Abstract] | |
| Rail route network, distance | mi | 20 |
| Number of states rail network serves | state | 26 |
Earnings Per Share - Schedule of Computation of Basic Earnings Per Share, Assuming Dilution (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Numerator: | ||||||
| Net Earnings | $ 829 | $ 646 | $ 963 | $ 880 | $ 1,475 | $ 1,843 |
| Denominator: | ||||||
| Average Common Shares Outstanding (in shares) | 1,867 | 1,944 | 1,878 | 1,951 | ||
| Other Potentially Dilutive Common Shares (in shares) | 2 | 4 | 3 | 4 | ||
| Average Common Shares Outstanding, Assuming Dilution (in shares) | 1,869 | 1,948 | 1,881 | 1,955 | ||
| Net Earnings Per Share, Basic (in dollars per share) | $ 0.44 | $ 0.50 | $ 0.79 | $ 0.94 | ||
| Net Earnings Per Share, Assuming Dilution (in dollars per share) | $ 0.44 | $ 0.49 | $ 0.78 | $ 0.94 | ||
Earnings Per Share - Schedule of Total Average Outstanding Stock Options Excluded from Diluted Earnings Per Share Calculation (Details) - shares shares in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Stock Options | ||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||
| Antidilutive securities (in shares) | 5 | 3 | 5 | 3 |
Earnings Per Share - Narrative (Details) - USD ($) $ / shares in Units, $ in Billions |
1 Months Ended | 3 Months Ended | ||||
|---|---|---|---|---|---|---|
Feb. 28, 2025 |
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Oct. 31, 2023 |
|
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||||
| Increase in quarterly dividend percentage | 8.00% | |||||
| Common stock, dividends, per share, declared (in dollars per share) | $ 0.13 | $ 0.13 | $ 0.12 | $ 0.12 | ||
| Share Repurchase Program October 2023 | ||||||
| Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items] | ||||||
| Share repurchase program authorized amount | $ 5.0 | |||||
| Share repurchase program, remaining amount | $ 1.4 | |||||
Earnings Per Share - Schedule of Share Repurchase (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Earnings Per Share [Abstract] | ||||
| Shares Repurchased (in shares) | 14 | 16 | 38 | 23 |
| Cost of Shares (Dollars in Millions) | $ 401.0 | $ 563.0 | $ 1,152.0 | $ 810.0 |
| Average Price Paid per Share (in dollars per share) | $ 28.28 | $ 34.51 | $ 30.39 | $ 35.08 |
| Excise Taxes Paid for Net Share Repurchases (Dollars in Millions) | $ 19.9 | $ 0.0 | $ 19.9 | $ 0.0 |
Stock Plans and Share-Based Compensation - Schedule of Pre-tax Expense and Income Tax Benefits Associated with Share-Based Compensation (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total Share-Based Compensation Expense | $ 15 | $ 13 | $ 29 | $ 29 |
| Income Tax Benefit | 3 | 3 | 6 | 8 |
| Restricted Stock Units | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total Share-Based Compensation Expense | 7 | 7 | 13 | 14 |
| Stock Options | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total Share-Based Compensation Expense | 3 | 3 | 6 | 6 |
| Employee Stock Purchase Plan | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total Share-Based Compensation Expense | 3 | 2 | 5 | 4 |
| Performance Units | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total Share-Based Compensation Expense | 2 | 1 | 2 | 3 |
| Stock Awards for Directors | ||||
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | ||||
| Total Share-Based Compensation Expense | $ 0 | $ 0 | $ 3 | $ 2 |
Stock Plans and Share-Based Compensation - Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award (Details) - Long-term Incentive Plans shares in Thousands |
1 Months Ended |
|---|---|
|
Feb. 28, 2025
$ / shares
shares
| |
| Performance Units | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Awards granted (in shares) | shares | 668 |
| Weighted-average grant date fair value (in dollars per share) | $ / shares | $ 33.74 |
| Restricted Stock Units | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Awards granted (in shares) | shares | 666 |
| Weighted-average grant date fair value (in dollars per share) | $ / shares | $ 33.37 |
| Stock Options | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Stock options granted (in shares) | shares | 1,100 |
| Weighted average grant date fair value, options (in dollars per share) | $ / shares | $ 10.16 |
Stock Plans and Share-Based Compensation - Narrative (Details) |
6 Months Ended |
|---|---|
|
Jun. 30, 2025
shares
| |
| Performance Units | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Award vesting period (in years) | 3 years |
| Performance Units | LTIP | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Percentage of grants with performance vesting, average annual operating income growth | 0.50 |
| Percentage of grants with performance vesting, cumulative free cash flow | 50.00% |
| Performance Units | LTIP | Certain Executive Officers | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Percentage of payout subject to upward or downward adjustment (up to) | 0.20 |
| Performance Units | LTIP | Minimum | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Payout percentage range for participants | 0.00% |
| Performance Units | LTIP | Maximum | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Payout percentage range for participants | 200.00% |
| Performance Units | LTIP | Maximum | Certain Executive Officers | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Payout percentage range for participants | 240.00% |
| Stock Options | LTIP | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Award vesting period (in years) | 3 years |
| Term of stock options (in years) | 10 years |
| Restricted Stock Units | LTIP | |
| Share-based Compensation Arrangement by Share-based Payment Award [Line Items] | |
| Award vesting period (in years) | 3 years |
| Number of equivalent shares of CSX common stock per unit of award (in shares) | 1 |
Casualty, Environmental and Other Reserves - Schedule of Casualty, Environmental and Other Reserves (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Loss Contingencies [Line Items] | ||
| Current | $ 158 | $ 149 |
| Long-term | 304 | 313 |
| Total | 462 | 462 |
| Total Casualty | ||
| Loss Contingencies [Line Items] | ||
| Current | 61 | 58 |
| Long-term | 149 | 150 |
| Total | 210 | 208 |
| Personal Injury | ||
| Loss Contingencies [Line Items] | ||
| Current | 54 | 51 |
| Long-term | 95 | 91 |
| Total | 149 | 142 |
| Occupational | ||
| Loss Contingencies [Line Items] | ||
| Current | 7 | 7 |
| Long-term | 54 | 59 |
| Total | 61 | 66 |
| Environmental | ||
| Loss Contingencies [Line Items] | ||
| Current | 39 | 37 |
| Long-term | 110 | 114 |
| Total | 149 | 151 |
| Other | ||
| Loss Contingencies [Line Items] | ||
| Current | 58 | 54 |
| Long-term | 45 | 49 |
| Total | $ 103 | $ 103 |
Casualty, Environmental and Other Reserves - Narrative (Details) |
6 Months Ended |
|---|---|
|
Jun. 30, 2025
USD ($)
site
claim
| |
| Casualty | |
| All Contingencies Reserves [Line Items] | |
| Self-insured retention amount, per occurrence | $ | $ 100,000,000 |
| Number of individual claims expected to exceed self insured retention amount | claim | 0 |
| Environmental | |
| All Contingencies Reserves [Line Items] | |
| Environmental impaired sites | site | 230 |
Commitments and Contingencies (Details) |
1 Months Ended | 6 Months Ended | |||||||
|---|---|---|---|---|---|---|---|---|---|
|
Jan. 31, 2024
USD ($)
party
|
Mar. 24, 2023
defendant
|
Mar. 02, 2023
mi
|
Sep. 28, 2021
mi
|
Jun. 30, 2018
defendant
|
Mar. 31, 2016
mi
|
May 31, 2007
entity
|
Jun. 30, 2025
USD ($)
mi
|
Mar. 02, 2022
party
|
|
| Loss Contingencies [Line Items] | |||||||||
| Casualty and catastrophic property deductible | $ 200,000,000 | ||||||||
| Casualty and non catastrophic property deductible | $ 175,000,000 | ||||||||
| Environmental | |||||||||
| Loss Contingencies [Line Items] | |||||||||
| Number of miles pertaining to passaic river tidal reach required to be studied by EPA | mi | 17 | ||||||||
| Number of lower miles under study | mi | 8 | ||||||||
| Number of upper miles under study | mi | 9 | 9 | |||||||
| Number of parties liable | party | 8 | ||||||||
| Number of parties participating in modified CD | party | 82 | ||||||||
| Number of parties | defendant | 37 | 110 | |||||||
| Environmental | Other Defendants | |||||||||
| Loss Contingencies [Line Items] | |||||||||
| Amount awarded to other party | $ 150,000,000 | ||||||||
| Pending Litigation | Fuel Surcharge Antitrust Litigation | |||||||||
| Loss Contingencies [Line Items] | |||||||||
| Class action lawsuits filed against U.S.-based Class I railroads, excluding CSXT (number of entities) | entity | 3 | ||||||||
| Minimum | Pending Litigation | |||||||||
| Loss Contingencies [Line Items] | |||||||||
| Possible loss for certain legal proceedings | $ 2,000,000 | ||||||||
| Maximum | Pending Litigation | |||||||||
| Loss Contingencies [Line Items] | |||||||||
| Possible loss for certain legal proceedings | 64,000,000 | ||||||||
| Total Casualty | |||||||||
| Loss Contingencies [Line Items] | |||||||||
| Self-insured retention amount, per occurrence (up to) | $ 100,000,000 | ||||||||
Employee Benefit Plans - Schedule of Components of Net Periodic Benefit Costs (Details) - Pension Benefits Cost - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Components of expense/ (income) related to net benefit expense: | ||||
| Service Cost Included in Labor and Fringe | $ 5 | $ 6 | $ 10 | $ 12 |
| Interest Cost | 28 | 27 | 55 | 53 |
| Expected Return on Plan Assets | (40) | (43) | (80) | (85) |
| Amortization of Net Loss | 5 | 4 | 11 | 9 |
| Total Included in Other Income - Net | (7) | (12) | (14) | (23) |
| Net Periodic Benefit Credit | $ (2) | $ (6) | $ (4) | $ (11) |
Employee Benefit Plans - Narrative (Details) |
Jun. 30, 2025
USD ($)
|
|---|---|
| Retirement Benefits [Abstract] | |
| Expected contributions to the Company's qualified pension plans in 2025 | $ 0 |
Debt and Credit Agreements - Schedule of Activity Related to Long-Term Debt (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Movement, Debt Instruments [Roll Forward] | ||
| Long-term Debt as of December 31, 2024 Current Portion | $ 606 | |
| Long-term Debt as of December 31, 2024 Long-term Portion | 17,897 | |
| Long-term Debt as of December 31, 2024, Total | 18,503 | |
| Long-term Debt Issued | 600 | $ 0 |
| Long-term Debt Repaid | (3) | $ (4) |
| Reclassifications | 0 | |
| Hedging, Discount, Premium and Other Activity | 66 | |
| Long-term Debt as of June 30, 2025 Current Portion | 616 | |
| Long-term Debt as of June 30, 2025 Long-term Portion | 18,550 | |
| Long-term Debt as of June 30, 2025, Total | 19,166 | |
| Current Portion | ||
| Movement, Debt Instruments [Roll Forward] | ||
| Long-term Debt as of December 31, 2024 Current Portion | 606 | |
| Long-term Debt Issued | 0 | |
| Long-term Debt Repaid | (3) | |
| Reclassifications | 2 | |
| Hedging, Discount, Premium and Other Activity | 11 | |
| Long-term Debt as of June 30, 2025 Current Portion | 616 | |
| Long-term Portion | ||
| Movement, Debt Instruments [Roll Forward] | ||
| Long-term Debt as of December 31, 2024 Long-term Portion | 17,897 | |
| Long-term Debt Issued | 600 | |
| Long-term Debt Repaid | 0 | |
| Reclassifications | (2) | |
| Hedging, Discount, Premium and Other Activity | 55 | |
| Long-term Debt as of June 30, 2025 Long-term Portion | $ 18,550 | |
Debt and Credit Agreements - Narrative (Details) |
3 Months Ended | 6 Months Ended | 12 Months Ended | ||||
|---|---|---|---|---|---|---|---|
|
Mar. 31, 2025
USD ($)
swap
|
Jun. 30, 2024
USD ($)
|
Jun. 30, 2025
USD ($)
swap
|
Jun. 30, 2024
USD ($)
|
Dec. 31, 2023
swap
|
Dec. 31, 2022
swap
|
Dec. 31, 2024
USD ($)
|
|
| Line of Credit Facility | |||||||
| Other operating activities | $ (50,000,000) | $ (19,000,000) | |||||
| Commercial Paper | |||||||
| Line of Credit Facility | |||||||
| Maximum borrowing capacity of credit facility | 1,000,000,000.0 | ||||||
| Borrowings outstanding | $ 75,000,000 | ||||||
| Weighted average interest rate | 4.62% | ||||||
| Commercial Paper | Minimum | |||||||
| Line of Credit Facility | |||||||
| Commercial paper term | 7 days | ||||||
| Commercial Paper | Maximum | |||||||
| Line of Credit Facility | |||||||
| Commercial paper term | 14 days | ||||||
| Two Separate Fixed-to-Floating Interest Rate Swaps Due 2055 | Fair Value Hedging | |||||||
| Line of Credit Facility | |||||||
| Derivative, number of fair value hedges | swap | 2 | ||||||
| Derivative, term of contract (in years) | 10 years | ||||||
| Two Separate Fixed-to-Floating Interest Rate Swaps Due 2055 | Fair Value Hedging | Designated as Hedging Instrument | |||||||
| Line of Credit Facility | |||||||
| Interest rate fair value hedge asset at fair value | $ 10,000,000 | ||||||
| Seven Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | |||||||
| Line of Credit Facility | |||||||
| Derivative, number of fair value hedges | swap | 7 | ||||||
| Derivative, term of contract (in years) | 10 years | ||||||
| Two Separate Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | |||||||
| Line of Credit Facility | |||||||
| Derivative, number of fair value hedges | swap | 2 | ||||||
| Five Separate Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | |||||||
| Line of Credit Facility | |||||||
| Derivative, number of fair value hedges | swap | 5 | ||||||
| Five Separate Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | Designated as Hedging Instrument | |||||||
| Line of Credit Facility | |||||||
| Fair value hedge derivative instrument liabilities at fair value | $ 92,000,000 | $ 123,000,000 | |||||
| 2023 Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | Designated as Hedging Instrument | |||||||
| Line of Credit Facility | |||||||
| Interest rate fair value hedge asset at fair value | 15,000,000 | 7,000,000 | |||||
| Interest Rate Swap | Cash Flow Hedge | Designated as Hedging Instrument | |||||||
| Line of Credit Facility | |||||||
| Asset value of the forward interest rate swap | 500,000,000 | ||||||
| Derivative asset, notional amount settled | $ 114,000,000 | $ 114,000,000 | |||||
| Other operating activities | $ 52,000,000 | ||||||
| Derivative asset, unsettled notional amount | 0 | $ 0 | |||||
| 5.05% Notes Due 2035 | |||||||
| Line of Credit Facility | |||||||
| Debt issued | $ 600,000,000 | ||||||
| Debt interest rate | 5.05% | ||||||
| Two Separate Fixed-to-Floating Interest Rate Swaps Due 2055 | |||||||
| Line of Credit Facility | |||||||
| Debt issued | $ 250,000,000 | ||||||
| Seven Fixed-to-Floating Interest Rate Swaps | |||||||
| Line of Credit Facility | |||||||
| Debt issued | 1,100,000,000 | ||||||
| 3.25% Notes Due 2027 | |||||||
| Line of Credit Facility | |||||||
| Debt issued | $ 850,000,000 | ||||||
| Debt interest rate | 3.25% | ||||||
| Unsecured Revolving Credit Facility Due 2028 | Credit Facility | |||||||
| Line of Credit Facility | |||||||
| Maximum borrowing capacity of credit facility | $ 1,200,000,000 | ||||||
| Borrowings outstanding | $ 0 | ||||||
Debt and Credit Agreements - Schedule of Interest Rate Derivatives (Details) - USD ($) |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Five Separate Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | Designated as Hedging Instrument | ||
| Derivative [Line Items] | ||
| Fair Value Asset Adjustment to Hedged Notes | $ 25,000,000 | $ 7,000,000 |
| Fair Value Liability Adjustment to Hedged Notes | (92,000,000) | (123,000,000) |
| Carrying Amount of Hedged Notes | 1,233,000,000 | 934,000,000 |
| Fixed Rate Notes Due Between 2036 and 2040 | ||
| Derivative [Line Items] | ||
| Notional Value of Hedged Notes | $ 1,300,000,000 | $ 1,050,000,000 |
Debt and Credit Agreements - Schedule of Interest Expense (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Five Separate Fixed-to-Floating Interest Rate Swaps | ||||
| Derivative [Line Items] | ||||
| Interest Expense Impact (Increase) Decrease | $ (5) | $ (8) | $ (10) | $ (16) |
Debt and Credit Agreements - Schedule of Unrealized Amounts Related to Cash Flow Hedges (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Derivative [Line Items] | ||||
| Unrealized Gain - Net of Tax | $ 0 | $ 3 | ||
| Cash Flow Hedge | ||||
| Derivative [Line Items] | ||||
| Unrealized Gain - Net of Tax | $ 0 | $ 1 | ||
Revenues - Schedule of Revenues Disaggregated by Lines of Business (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | $ 3,574 | $ 3,701 | $ 6,997 | $ 7,382 |
| Total Merchandise | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 2,257 | 2,296 | 4,409 | 4,481 |
| Chemicals | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 701 | 722 | 1,399 | 1,415 |
| Agricultural and Food Products | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 418 | 406 | 826 | 813 |
| Automotive | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 320 | 336 | 591 | 629 |
| Forest Products | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 250 | 269 | 499 | 531 |
| Metals and Equipment | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 224 | 230 | 433 | 450 |
| Minerals | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 218 | 207 | 399 | 381 |
| Fertilizers | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 126 | 126 | 262 | 262 |
| Intermodal | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 491 | 506 | 984 | 1,012 |
| Coal | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 477 | 563 | 938 | 1,195 |
| Trucking | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | 211 | 221 | 413 | 436 |
| Other | ||||
| Disaggregation of Revenue [Line Items] | ||||
| Revenue | $ 138 | $ 115 | $ 253 | $ 258 |
Revenues - Schedule of Accounts Receivable, Net (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Total Accounts Receivable - Net | $ 1,409 | $ 1,326 |
| Freight Receivables | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accounts receivable, gross | 1,054 | 1,012 |
| Allowance for credit losses | (20) | (16) |
| Total Accounts Receivable - Net | 1,034 | 996 |
| Non-Freight Receivables | ||
| Accounts, Notes, Loans and Financing Receivable [Line Items] | ||
| Accounts receivable, gross | 393 | 343 |
| Allowance for credit losses | (18) | (13) |
| Total Accounts Receivable - Net | $ 375 | $ 330 |
Fair Value Measurements - Schedule of Fair Value of Investment Assets (Details) - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fair Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | $ 163 | $ 214 |
| Carrying Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 163 | 214 |
| Total investments at amortized cost | 164 | 218 |
| Level 1 | Fair Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 5 | 2 |
| Level 1 | Fair Value | Exchange-traded Funds | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 5 | 2 |
| Level 1 | Fair Value | Corporate Bonds | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 0 | 0 |
| Level 1 | Fair Value | Government Securities | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 0 | 0 |
| Level 1 | Fair Value | Asset-backed Securities | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 0 | 0 |
| Level 1 | Fair Value | Time Deposits | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 0 | 0 |
| Level 2 | Fair Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 163 | 214 |
| Level 2 | Fair Value | Exchange-traded Funds | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 0 | 0 |
| Level 2 | Fair Value | Corporate Bonds | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 75 | 71 |
| Level 2 | Fair Value | Government Securities | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 53 | 42 |
| Level 2 | Fair Value | Asset-backed Securities | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 35 | 35 |
| Level 2 | Fair Value | Time Deposits | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 0 | 66 |
| Total | Fair Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 168 | 216 |
| Total | Fair Value | Exchange-traded Funds | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 5 | 2 |
| Total | Fair Value | Corporate Bonds | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 75 | 71 |
| Total | Fair Value | Government Securities | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 53 | 42 |
| Total | Fair Value | Asset-backed Securities | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | 35 | 35 |
| Total | Fair Value | Time Deposits | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Total Investments at Fair Value | $ 0 | $ 66 |
Fair Value Measurements - Schedule of Investment Maturities (Details) - Fair Value - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Less than 1 year | $ 6 | $ 72 |
| 1 - 5 years | 86 | 72 |
| 5 - 10 years | 24 | 23 |
| Greater than 10 years | 47 | 47 |
| Total Investments at Fair Value | $ 163 | $ 214 |
Fair Value Measurements - Schedule of Fair Value and Carrying Value of Long-Term Debt (Details) - Level 2 - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| Fair Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term Debt (Including Current Maturities): | $ 17,426 | $ 16,481 |
| Carrying Value | ||
| Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] | ||
| Long-term Debt (Including Current Maturities): | $ 19,166 | $ 18,503 |
Fair Value Measurements - Narrative (Details) - Designated as Hedging Instrument - USD ($) $ in Millions |
Jun. 30, 2025 |
Dec. 31, 2024 |
|---|---|---|
| 2023 & 2025 Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | ||
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Interest rate fair value hedge asset at fair value | $ 25 | $ 7 |
| 2022 Fixed-to-Floating Interest Rate Swaps | Fair Value Hedging | ||
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Fair value hedge derivative instrument liabilities at fair value | 92 | 123 |
| Forward Starting Interest Rate Swap | Cash Flow Hedge | ||
| Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items] | ||
| Cash flow hedge derivative instrument assets at fair value | 0 | 0 |
| Cash flow hedge derivative instrument liabilities at fair value | $ 0 | $ 0 |
Other Comprehensive Income (Loss) - Narrative (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||||
|---|---|---|---|---|---|---|
Jun. 30, 2025 |
Mar. 31, 2025 |
Jun. 30, 2024 |
Mar. 31, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Equity [Abstract] | ||||||
| Comprehensive earnings | $ 832 | $ 651 | $ 966 | $ 886 | $ 1,483 | $ 1,852 |
Other Comprehensive Income (Loss) - Schedule of Changes in AOCI balance by Component (Details) $ in Millions |
6 Months Ended | |||
|---|---|---|---|---|
|
Jun. 30, 2025
USD ($)
| ||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||
| Beginning Balance | $ 12,507 | |||
| Other Comprehensive Income (Loss) | ||||
| Ending Balance | 12,377 | |||
| Accumulated Other Comprehensive (Loss) Income | ||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||
| Beginning Balance | (232) | [1] | ||
| Other Comprehensive Income (Loss) | ||||
| Amounts Reclassified to Net Earnings | 11 | |||
| Tax Expense | (3) | |||
| Total Other Comprehensive Income | 8 | |||
| Ending Balance | (224) | [1] | ||
| Pension and Other Post-Employment Benefits | ||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||
| Beginning Balance | (349) | |||
| Other Comprehensive Income (Loss) | ||||
| Amounts Reclassified to Net Earnings | 8 | |||
| Tax Expense | (2) | |||
| Total Other Comprehensive Income | 6 | |||
| Ending Balance | (343) | |||
| Interest Rate Derivatives | ||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||
| Beginning Balance | 153 | |||
| Other Comprehensive Income (Loss) | ||||
| Amounts Reclassified to Net Earnings | 0 | |||
| Tax Expense | 0 | |||
| Total Other Comprehensive Income | 0 | |||
| Ending Balance | 153 | |||
| Other | ||||
| AOCI Attributable to Parent, Net of Tax [Roll Forward] | ||||
| Beginning Balance | (36) | |||
| Other Comprehensive Income (Loss) | ||||
| Amounts Reclassified to Net Earnings | 3 | |||
| Tax Expense | (1) | |||
| Total Other Comprehensive Income | 2 | |||
| Ending Balance | $ (34) | |||
| ||||
Segment Reporting and Significant Expenses- Narrative (Details) $ in Millions |
3 Months Ended | 6 Months Ended | |||
|---|---|---|---|---|---|
|
Jun. 30, 2025
USD ($)
|
Jun. 30, 2024
USD ($)
|
Jun. 30, 2025
USD ($)
segment
|
Jun. 30, 2024
USD ($)
|
Dec. 31, 2024
USD ($)
|
|
| Segment Reporting, Asset Reconciling Item [Line Items] | |||||
| Number of operating segments | segment | 2 | ||||
| Assets | $ 42,929 | $ 42,929 | $ 42,764 | ||
| Rail Operations | |||||
| Segment Reporting, Asset Reconciling Item [Line Items] | |||||
| Segment, expenditure, addition to long-lived assets | 766 | $ 524 | 1,457 | $ 1,021 | |
| Assets | $ 42,700 | $ 42,700 | $ 42,600 | ||
Segment Reporting and Significant Expenses- Schedule of Segment Reporting Information (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Revenue | $ 3,574 | $ 3,701 | $ 6,997 | $ 7,382 |
| Labor and Fringe | 791 | 766 | 1,612 | 1,571 |
| Purchased Services and Other | 710 | 691 | 1,484 | 1,411 |
| Depreciation and Amortization | 427 | 410 | 852 | 820 |
| Fuel | 269 | 301 | 544 | 626 |
| Equipment and Other Rents | 94 | 85 | 181 | 169 |
| Operating Income | 1,283 | 1,448 | 2,324 | 2,785 |
| Expenses | 2,291 | 2,253 | 4,673 | 4,597 |
| Operating Segments | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Operating Income | 1,277 | 1,441 | 2,315 | 2,772 |
| Eliminations | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Revenue | (8) | (2) | (13) | (4) |
| Expenses | (8) | (2) | (13) | (4) |
| Rail Operations | Operating Segments | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Revenue | 3,363 | 3,480 | 6,584 | 6,946 |
| Labor and Fringe | 736 | 719 | 1,510 | 1,478 |
| Purchased Services and Other | 605 | 577 | 1,269 | 1,178 |
| Depreciation and Amortization | 410 | 396 | 820 | 791 |
| Equipment and Other Rents | 90 | 80 | 172 | 159 |
| Gains on Property Dispositions | (4) | (9) | (5) | (10) |
| Operating Income | 1,277 | 1,441 | 2,315 | 2,772 |
| Rail Operations | Operating Segments | Fuel - Locomotive | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Fuel | 226 | 249 | 451 | 525 |
| Rail Operations | Operating Segments | Fuel - Non- Locomotive | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Fuel | 23 | 27 | 52 | 53 |
| Trucking Operating Segment | Operating Segments | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Revenue | 219 | 223 | 426 | 440 |
| Expenses | 213 | 216 | 417 | 427 |
| Trucking Operating Segment | Eliminations | ||||
| Segment Reporting, Asset Reconciling Item [Line Items] | ||||
| Revenue | 211 | 221 | 413 | 436 |
| Expenses | $ 205 | $ 214 | $ 404 | $ 423 |
Segment Reporting and Significant Expenses- Schedule of Reconciliation of Segment Operating Income (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2025 |
Jun. 30, 2024 |
Jun. 30, 2025 |
Jun. 30, 2024 |
|
| Segment Reporting Information [Line Items] | ||||
| Segment Operating Income | $ 1,283 | $ 1,448 | $ 2,324 | $ 2,785 |
| Revenue | 3,574 | 3,701 | 6,997 | 7,382 |
| Trucking Expenses and Eliminations | (2,291) | (2,253) | (4,673) | (4,597) |
| Operating Income | 1,283 | 1,448 | 2,324 | 2,785 |
| Interest Expense | (212) | (209) | (421) | (419) |
| Other Income - Net | 22 | 28 | 48 | 69 |
| Earnings Before Income Taxes | 1,093 | 1,267 | 1,951 | 2,435 |
| Operating Segments | ||||
| Segment Reporting Information [Line Items] | ||||
| Segment Operating Income | 1,277 | 1,441 | 2,315 | 2,772 |
| Operating Income | 1,277 | 1,441 | 2,315 | 2,772 |
| Operating Segments | Trucking Operating Segment | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenue | 219 | 223 | 426 | 440 |
| Trucking Expenses and Eliminations | (213) | (216) | (417) | (427) |
| Eliminations | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenue | (8) | (2) | (13) | (4) |
| Trucking Expenses and Eliminations | 8 | 2 | 13 | 4 |
| Eliminations | Trucking Operating Segment | ||||
| Segment Reporting Information [Line Items] | ||||
| Revenue | 211 | 221 | 413 | 436 |
| Trucking Expenses and Eliminations | $ (205) | $ (214) | $ (404) | $ (423) |