CSX (CSX) 10-Q 12 Oct 16 2016 Q3 Quarterly report Financial data

Document And Entity Information

Document And Entity Information	9 Months Ended
	Sep. 23, 2016shares
Document and Entity Information [Abstract]
Entity Registrant Name	CSX CORP
Entity Central Index Key	277,948
Current Fiscal Year End Date	--12-30
Entity Filer Category	Large Accelerated Filer
Entity Common Stock, Shares Outstanding	936,661,112
Document Fiscal Year Focus	2,016
Document Fiscal Period Focus	Q3
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Sep. 23, 2016

CONSOLIDATED INCOME STATEMENTS

CONSOLIDATED INCOME STATEMENTS (Unaudited) - USD ($) shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Income Statement
Revenue	$ 2,710	$ 2,939	$ 8,032	$ 9,030
Expense
Labor and Fringe	762	787	2,307	2,491
Materials, Supplies and Other	507	580	1,576	1,766
Fuel	174	223	496	756
Depreciation	321	302	953	896
Equipment and Other Rents	105	114	315	328
Total Expense	1,869	2,006	5,647	6,237
Operating Income	841	933	2,385	2,793
Interest Expense	(139)	(136)	(423)	(404)
Other Income - Net	13	2	28	8
Earnings Before Income Taxes	715	799	1,990	2,397
Income Tax Expense	(260)	(292)	(734)	(895)
Net Earnings	$ 455	$ 507	$ 1,256	$ 1,502
Per Common Share
Net Earnings Per Share, Basic (in dollars per share)	$ 0.48	$ 0.52	$ 1.32	$ 1.52
Net Earnings Per Share, Assuming Dilution (in dollars per share)	$ 0.48	$ 0.52	$ 1.32	$ 1.52
Average Shares Outstanding (in shares)	942	981	952	986
Average Shares Outstanding, Assuming Dilution (in shares)	943	982	953	987
Cash Dividends Paid Per Common Share (in dollars per share)	$ 0.18	$ 0.18	$ 0.54	$ 0.52

CONSOLIDATED COMPREHENSIVE INCO

CONSOLIDATED COMPREHENSIVE INCOME STATEMENTS (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Statement of Comprehensive Income [Abstract]
Total Comprehensive Earnings	$ 465	$ 518	$ 1,282	$ 1,523

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Millions	Sep. 23, 2016	Dec. 25, 2015	Sep. 25, 2015	Dec. 26, 2014
Current Assets:
Cash and Cash Equivalents	$ 603	$ 628	$ 541	$ 669
Short-term Investments	152	810
Accounts Receivable - Net	925	982
Materials and Supplies	397	350
Other Current Assets	86	70
Total Current Assets	2,163	2,840
Properties	42,720	41,574
Accumulated Depreciation	(11,938)	(11,400)
Properties - Net	30,782	30,174
Other Long-term Assets	303	337
Total Assets	34,681	34,745
Current Liabilities:
Accounts Payable	859	764
Labor and Fringe Benefits Payable	450	490
Casualty, Environmental and Other Reserves	124	131
Current Maturities of Long-term Debt	631	20
Income and Other Taxes Payable	90	108
Other Current Liabilities	109	439
Total Current Liabilities	2,263	1,952
Casualty, Environmental and Other Reserves	250	269
Long-term Debt	9,888	10,515
Deferred Income Taxes - Net	9,505	9,179
Other Long-term Liabilities	1,105	1,162
Total Liabilities	23,011	23,077
Shareholders' Equity:
Common Stock, $1 Par Value	937	966
Other Capital	125	113
Retained Earnings	11,233	11,238
Accumulated Other Comprehensive Loss	(639)	(665)
Noncontrolling Interest	14	16
Total Shareholders' Equity	11,670	11,668
Total Liabilities and Shareholders' Equity	34,681	34,745
Investments in Conrail
Current Assets:
Investment in Affiliates and Other Companies	830	803
Affiliates and Other Companies
Current Assets:
Investment in Affiliates and Other Companies	$ 603	$ 591

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Sep. 23, 2016	Dec. 25, 2015
Shareholders' Equity:
Common stock, par value (in dollars per share)	$ 1	$ 1

CONSOLIDATED CASH FLOW STATEMEN

CONSOLIDATED CASH FLOW STATEMENTS (Unaudited) - USD ($) $ in Millions	9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015
OPERATING ACTIVITIES
Net Earnings	$ 1,256	$ 1,502
Adjustments to Reconcile Net Earnings to Net Cash Provided by Operating Activities:
Depreciation	953	896
Deferred Income Taxes	312	82
Gain on Property Dispositions	(4)	(20)
Other Operating Activities	(47)	47
Changes in Operating Assets and Liabilities:
Accounts Receivable	68	126
Other Current Assets	(58)	(61)
Accounts Payable	94	3
Income and Other Taxes Payable	(25)	110
Other Current Liabilities	(61)	(173)
Net Cash Provided by Operating Activities	2,488	2,512
INVESTING ACTIVITIES
Property Additions	(1,590)	(1,909)
Purchase of Short-term Investments	(410)	(1,170)
Proceeds from Sales of Short-term Investments	1,070	1,040
Proceeds from Property Dispositions	11	46
Other Investing Activities	26	42
Net Cash Used in Investing Activities	(893)	(1,951)
FINANCING ACTIVITIES
Long-term Debt Issued	0	600
Long-term Debt Repaid	(19)	(228)
Dividends Paid	(513)	(512)
Shares Repurchased	(778)	(546)
Other Financing Activities	(310)	(3)
Net Cash Used in Financing Activities	(1,620)	(689)
Net Decrease in Cash and Cash Equivalents	(25)	(128)
CASH AND CASH EQUIVALENTS
Cash and Cash Equivalents at Beginning of Period	628	669
Cash and Cash Equivalents at End of Period	$ 603	$ 541

Nature of Operations and Signif

Nature of Operations and Significant Accounting Policies	9 Months Ended
	Sep. 23, 2016
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 (“CSX”), together with its subsidiaries (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 and the transport of intermodal containers and trailers. CSX's principal operating subsidiary, CSX Transportation, Inc. (“CSXT”), provides an important link to the transportation supply chain through its approximately 21,000 route mile rail network, which serves major population centers in 23 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. Other entities In addition to CSXT, the Company’s subsidiaries include 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. 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 and trucking dispatch operations. 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 include shipments of plastics and ethanol. CSX Technology and other subsidiaries provide support services for the Company. CSX’s other holdings include CSX Real Property, Inc., a subsidiary responsible for the Company’s operating and non-operating real estate sales, leasing, acquisition and management and development activities. These activities are classified in either operating income or other income - net depending upon the nature of the activity. Results of these activities fluctuate with the timing of real estate transactions. Basis of Presentation In the opinion of management, the accompanying consolidated financial statements contain all normal, recurring adjustments necessary to fairly present the following: • Consolidated income statements for the nine months ended September 23, 2016 and September 25, 2015 ; • Consolidated comprehensive income statements for the nine months ended September 23, 2016 and September 25, 2015 ; • Consolidated balance sheets at September 23, 2016 and December 25, 2015 ; and • Consolidated cash flow statements for the nine months ended September 23, 2016 and September 25, 2015 . 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 and any subsequently filed current reports on Form 8-K. NOTE 1. Nature of Operations and Significant Accounting Policies, continued Fiscal Year CSX follows a 52 /53 week fiscal reporting calendar with the last day of each reporting period ending on a Friday: • The third fiscal quarters of 2016 and 2015 consisted of 13 weeks ending on September 23, 2016 and September 25, 2015 , respectively. • Fiscal year 2016 will consist of 53 weeks ending on December 30, 2016 . • Fiscal year 2015 consisted of 52 weeks ending on December 25, 2015 . Except as otherwise specified, references to “ third quarter(s)” or “ nine months” indicate CSX's fiscal periods ending September 23, 2016 and September 25, 2015 , and references to "year-end" indicate the fiscal year ended December 25, 2015 . Allowance for Doubtful Accounts The Company maintains an allowance for doubtful accounts on uncollectible amounts related to freight receivables, government reimbursement receivables, claims for damages and other various receivables. The allowance is based upon the creditworthiness of customers, historical experience, the age of the receivable and current market and economic conditions. Uncollectible amounts are charged against the allowance account. Allowance for doubtful accounts of $29 million and $ 37 million is included in the consolidated balance sheets as of the end of third quarter 2016 and December 25, 2015 , respectively. New Accounting Pronouncements In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU"), Improvements to Employee Share-based Payment Accounting , which requires excess tax benefits and deficiencies to be recorded as income tax expense or benefit in the income statement rather than being recorded in additional paid-in capital. The Company adopted the provisions of this rule during the second quarter of 2016 which did not have a material effect on the Company's financial condition, results of operations or liquidity. In November 2015, the FASB issued ASU, Balance Sheet Classification of Deferred Taxes , which requires that all deferred income taxes be classified as noncurrent in the balance sheet, rather than being separated into current and noncurrent amounts. The Company adopted the provisions of this rule during second quarter 2016 and applied them retrospectively. Current deferred income tax assets of $126 million as of December 25, 2015 have been reclassified and reported as a reduction of deferred income tax liabilities on the balance sheet. Adoption did not have a material effect on the Company's financial condition, results of operations or liquidity. In February 2016, the FASB issued ASU, Leases , which will require lessees to recognize most leases on their balance sheets as a right-of-use asset with a corresponding lease liability, and lessors to recognize a net lease investment. Additional qualitative and quantitative disclosures will also be required. This standard is effective for fiscal years beginning after December 15, 2018. While the Company is still assessing the impact of this standard, CSX does not believe this standard will have a material effect on the Company's financial condition, results of operations or liquidity.

Earnings Per Share

Earnings Per Share	9 Months Ended
	Sep. 23, 2016
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: Third Quarters Nine Months 2016 2015 2016 2015 Numerator (Dollars in millions) : Net Earnings $ 455 $ 507 $ 1,256 $ 1,502 Dividend Equivalents on Restricted Stock — — (1 ) (1 ) Net Earnings, Attributable to Common Shareholders $ 455 507 $ 1,255 1,501 Denominator (Units in millions) : Average Common Shares Outstanding 942 981 952 986 Other Potentially Dilutive Common Shares 1 1 1 1 Average Common Shares Outstanding, Assuming Dilution 943 982 953 987 Net Earnings Per Share, Basic $ 0.48 $ 0.52 $ 1.32 $ 1.52 Net Earnings Per Share, Assuming Dilution $ 0.48 $ 0.52 $ 1.32 $ 1.52 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 equivalents outstanding 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, which include long-term incentive awards, and employee stock options. The Earnings Per Share Topic in the FASB's Accounting Standards Codification ("ASC") requires CSX to include additional shares in the computation of earnings per share, assuming dilution. The additional shares included in diluted earnings per share represent the number of shares that would be issued if all of the above potentially dilutive instruments were converted into CSX common stock. When calculating diluted earnings per share, this rule requires CSX to include the potential shares that would be outstanding if all outstanding stock options were exercised. This number is different from outstanding stock options, which is included in Note 3, Share-Based Compensation, because it is offset by shares CSX could repurchase using the proceeds from these hypothetical exercises to obtain the common stock equivalent. Approximately 2.4 million and 3.8 million of total average outstanding stock options for the third quarter and nine months ended 2016 , respectively, were excluded from the diluted earnings per share calculation because their effect was antidilutive. There were no stock options outstanding for third quarter 2015. NOTE 2. Earnings Per Share, continued Share Repurchases In April 2015, the Company announced a new $2 billion share repurchase program, which is expected to be completed by April 2017. During the third quarters of 2016 and 2015, the Company repurchased approximately $263 million , or ten million shares, and $262 million , or nine million shares, respectively. During the nine months of 2016 and 2015 , the Company repurchased $778 million , or 30 million shares, and $546 million , or 17 million shares, respectively. Shares are retired immediately upon repurchase. Management's assessment of market conditions and other factors guides the timing and volume of repurchases. Future share repurchases are expected to be funded by cash on hand, cash generated from operations and debt issuances. In accordance with the Equity Topic in the ASC, the excess of repurchase price over par value is recorded in retained earnings. Generally, retained earnings is only impacted by net earnings and dividends.

Share-Based Compensation

Share-Based Compensation	9 Months Ended
	Sep. 23, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation	Share-Based Compensation Under CSX's share-based compensation plans, awards consist of performance units, restricted stock awards, restricted stock units and stock options for management and stock grants for directors. Awards granted under the various programs are determined and approved by the Compensation Committee of the Board of Directors or, in certain circumstances, by the Chief Executive Officer for awards to management employees other than senior executives. The Board of Directors approves awards granted to the Company's non-management directors upon recommendation of the Governance Committee. In February 2016 , the Company granted performance units, restricted stock units and stock options as part of the Company's long-term share-based compensation plans. Long-term Incentive Plan Approximately 839 thousand performance units were granted to certain employees under a new long-term incentive plan ("2016-2018 LTIP"). The 2016-2018 LTIP was adopted under the CSX Stock and Incentive Award Plan. Payouts of performance units for the cycle ending with fiscal year 2018 will be based on the achievement of goals related to both operating ratio and return on assets in each case excluding non-recurring items as disclosed in the Company's financial statements. The cumulative operating ratio and average return on assets over the plan period will each comprise 50% of the payout and will be measured independently of the other. Grants were made in performance units, with each unit representing the right to receive one share of CSX common stock, and payouts will be made in CSX common stock. The payout range for participants will be between 0% and 200% of the target awards depending on Company performance against predetermined goals. Payouts for certain executive officers are subject to downward adjustment by up to 30% based upon total shareholder return relative to specified comparable groups. Restricted Stock Units The Company granted approximately 419 thousand restricted stock units. The restricted stock units vest three years after the date of grant. Participants receive cash dividend equivalents on the unvested shares during the restriction period. These awards are time-based and are not based upon attainment of performance goals. NOTE 3. Share-Based Compensation, continued Stock Options The Company granted approximately 2.4 million stock options. The fair value of stock options on the date of grant was $4.68 per share which was estimated using the Black-Scholes valuation model. Stock options have been granted with ten -year terms and vest three years after the date of grant. The exercise price for stock options granted equals the closing market price of the underlying stock on the date of grant. These awards are time-based and are not based upon attainment of performance goals. The terms of performance units, restricted stock units and stock options all require participants to be employed through the final day of the respective performance or vesting period as applicable, except in the case of death, disability or retirement. For information related to the Company's other outstanding long-term incentive compensation, see CSX's most recent annual report on Form 10-K. Total pre-tax expense associated with all share-based compensation and the related income tax benefit are as follows: Third Quarters Nine Months (Dollars in millions) 2016 2015 2016 2015 Share-Based Compensation Expense $ 9 $ 2 $ 24 $ 20 Income Tax Benefit 3 1 9 8

Casualty, Environmental and Oth

Casualty, Environmental and Other Reserves	9 Months Ended
	Sep. 23, 2016
Casualty, Environmental and Other Reserves [Abstract]
Casualty, Environmental and Other Reserves	Casualty, Environmental and Other Reserves Casualty, environmental and other reserves are considered critical accounting estimates due to the need for significant management judgment. They are provided for in the consolidated balance sheets as shown in the table below: September 23, December 25, (Dollars in millions) Current Long-term Total Current Long-term Total Casualty: Personal Injury $ 57 $ 135 $ 192 $ 57 $ 147 $ 204 Asbestos 4 42 46 9 44 53 Occupational 4 5 9 3 9 12 Total Casualty 65 182 247 69 200 269 Environmental 41 38 79 42 40 82 Other 18 30 48 20 29 49 Total $ 124 $ 250 $ 374 $ 131 $ 269 $ 400 These liabilities are accrued when estimable and probable 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 effect on the Company's financial condition, results of operations or liquidity. Should a number of these items occur in the same period, however, they could have a material effect on the Company's financial condition, results of operations or liquidity in that particular period. NOTE 4. Casualty, Environmental and Other Reserves, continued Casualty Casualty reserves of $247 million and $269 million as of September 23, 2016 and December 25, 2015 , respectively, represent accruals for personal injury, asbestos and occupational injury claims. The Company's self-insured retention amount for these claims is $ 50 million per occurrence. Currently, no individual claim is expected to exceed the self-insured retention amount. In accordance with the Contingencies Topic in the ASC, to the extent the value of an individual claim exceeds the self-insured retention amount, the Company would present the liability on a gross basis with a corresponding receivable for insurance recoveries. These reserves fluctuate based upon the timing of payments as well as changes in estimate. Actual results may vary from estimates due to the number, type and severity of the injury, costs of medical treatments and uncertainties in litigation. Most of the Company's casualty claims relate to CSXT unless otherwise noted below. Defense and processing costs, which historically have been insignificant and are anticipated to be insignificant in the future, are not included in the recorded liabilities. 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”). In addition to FELA liabilities, employees of other current or former CSX subsidiaries are covered by various state workers’ compensation laws, the Federal Longshore and Harbor Workers’ Compensation Program or the Maritime Jones Act. 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 for the quarter resulted in an immaterial adjustment to the personal injury reserve. The methodology used by the actuary includes a development factor to reflect growth or reduction in the value of these personal injury claims. It is based largely on CSXT's historical claims and settlement experience. Asbestos & Occupational The Company is party to a number of asbestos claims by employees alleging exposure to asbestos in the workplace. Management reviews asserted asbestos claims quarterly. Unasserted or incurred but not reported ("IBNR") asbestos claims are analyzed by a third-party specialist and reviewed by management annually. CSXT’s historical claim filings, settlement amounts, and dismissal rates are analyzed to determine future anticipated claim filing rates and average settlement values for asbestos claims reserves. The potentially exposed population is estimated by using CSXT’s employment records and industry data. From this analysis, the specialist estimates the IBNR claims liabilities. Occupational claims arise from allegations of exposure to certain materials in the workplace, such as solvents, soaps, chemicals (collectively referred to as “irritants”) and diesel fuels (like exhaust fumes) or allegations of chronic physical injuries resulting from work conditions, such as repetitive stress injuries, carpal tunnel syndrome and hearing loss. NOTE 4. Casualty, Environmental and Other Reserves, continued Environmental Environmental reserves were $79 million and $82 million as of September 23, 2016 and December 25, 2015 , respectively. 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 225 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. In accordance with the Asset Retirement and Environmental Obligations Topic in the ASC, the Company reviews its role with respect to each site identified at least quarterly, giving consideration to a number of factors such as: • type of clean-up required; • nature of the Company's alleged connection to the location (e.g., generator of waste sent to the site or owner or operator of the site); • extent of the Company's alleged connection (e.g., volume of waste sent to the location and other relevant factors); and • number, connection and financial viability of other named and unnamed potentially responsible parties at the location. Based on the review process, the Company has recorded amounts to cover contingent anticipated future environmental remediation costs with respect to each site to the extent such costs are estimable and probable. The recorded liabilities for estimated future environmental costs are undiscounted. The liability includes future costs for remediation and restoration of sites as well as any significant ongoing monitoring costs, but excludes any anticipated insurance recoveries. Payments related to these liabilities are expected to be made over the next several years. Environmental remediation costs are included in materials, supplies and other on the consolidated income statement. 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. NOTE 4. Casualty, Environmental and Other Reserves, continued Other Other reserves of $48 million and $49 million as of September 23, 2016 and December 25, 2015 , include liabilities for various claims, such as property, automobile and general liability. Also included in other reserves are longshoremen disability claims related to a previously owned international shipping business (these claims are in runoff) as well as claims for current port employees.

Commitments and Contingencies

Commitments and Contingencies	9 Months Ended
	Sep. 23, 2016
Commitments and Contingencies Disclosure [Abstract]
Commitments and Contingencies	Commitments and Contingencies Insurance The Company maintains numerous insurance programs with substantial limits for property damage (which includes business interruption) and third-party liability. A certain amount of risk is retained by the Company on each of the property and liability programs. The Company has a $ 25 million retention per occurrence for the non-catastrophic property program (such as a derailment) and a $ 50 million retention per occurrence for the liability and catastrophic property programs (such as hurricanes and floods). 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 outcome of these matters cannot be reasonably determined, 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 legal proceedings for which a loss is reasonably possible in excess of reserves established. The Company has estimated this range to be $6 million to $115 million in aggregate at September 23, 2016 . 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. In November 2007, the class action lawsuits were consolidated in federal court in the District of Columbia, where they are now pending. The suit seeks treble damages allegedly sustained by purported class members as well as attorneys' fees and other relief. Plaintiffs are expected to allege damages at least equal to the fuel surcharges at issue. In June 2012, the District Court certified the case as a class action. The decision was not a ruling on the merits of plaintiffs' claims, but rather a decision to allow the plaintiffs to seek to prove the case as a class. The defendant railroads petitioned the U.S. Court of Appeals for the D.C. Circuit for permission to appeal the District Court's class certification decision. In August 2013, the D.C. Circuit issued a decision vacating the class certification decision and remanded the case to the District Court to reconsider its class certification decision. The District Court remand proceedings are underway and the class certification hearing was held in September 2016. The District Court has delayed proceedings on the merits of the case pending the outcome of the class certification remand proceedings. The court has given no indication of timing on its ruling regarding class certification. CSXT believes that its fuel surcharge practices were arrived at and applied lawfully and that the case is without merit. Accordingly, the Company intends to defend itself vigorously. However, penalties for violating antitrust laws can be severe, and resolution of this matter or an unexpected adverse decision on the merits could have a material adverse effect on the Company's financial condition, results of operations or liquidity in that particular period. Environmental CSXT is indemnifying Pharmacia LLC (formerly known as Monsanto Company) 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 cleanup and removal costs and other damages associated with the presence 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. In March 2016, EPA issued its Record of Decision detailing the agency’s mandated remedial process for the lower 8 miles of the Study Area, which was based on a Focused Feasibility Study. EPA has estimated that it will take the potentially responsible parties approximately ten years to complete the work. At a later date, EPA will select a remedy for the remainder of the Study Area and is expected to again seek the participation of private parties to implement the selected remedy using EPA’s CERCLA authority to compel such participation, if necessary. 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 any indemnification or remediation costs potentially allocable to CSXT with respect to the Property and the Study Area would be material to the Company's financial condition, results of operations or liquidity.

Employee Benefit Plans

Employee Benefit Plans	9 Months Ended
	Sep. 23, 2016
Compensation and Retirement Disclosure [Abstract]
Employee Benefit Plans	Employee Benefit Plans The Company sponsors defined benefit pension plans principally for salaried, management personnel. For employees hired prior to January 1, 2003, the plans provide eligible employees with retirement benefits based predominantly on years of service and compensation rates near retirement. For employees hired in 2003 or thereafter, benefits are determined based on a cash balance formula, which provides benefits by utilizing interest and pay credits based upon age, service and compensation. In addition to these plans, the Company sponsors a post-retirement medical plan and a life insurance plan that provide certain benefits to full-time, salaried, management employees, hired prior to January 1, 2003, upon their retirement if certain eligibility requirements are met. Eligible retirees who are age 65 years or older (Medicare-eligible) are covered by a health reimbursement arrangement, which is an employer-funded account that can be used for reimbursement of eligible medical expenses. Eligible retirees younger than 65 years (non-Medicare eligible) are covered by a self-insured program partially funded by participating retirees. The life insurance plan is non-contributory. The Company engages independent actuaries to 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. The following table describes the components of expense / (income) related to net benefit expense recorded in labor and fringe on the income statement. Pension Benefits (Dollars in millions) Third Quarters Nine Months 2016 2015 2016 2015 Service Cost $ 12 $ 12 $ 36 $ 34 Interest Cost 29 29 89 87 Expected Return on Plan Assets (39 ) (41 ) (118 ) (122 ) Amortization of Net Loss 12 17 36 52 Net Periodic Benefit Cost 14 17 43 51 Special Termination Benefits – Workforce Reduction Program (a) — — — 7 Total Expense $ 14 $ 17 $ 43 $ 58 Other Post-retirement Benefits (Dollars in millions) Third Quarters Nine Months 2016 2015 2016 2015 Service Cost $ — $ 2 $ 1 $ 3 Interest Cost 3 3 9 10 Amortization of Net Loss 1 1 2 3 Amortization of Prior Service Costs — (1 ) — (1 ) Total Expense $ 4 $ 5 $ 12 $ 15 (a) Special termination benefits were charges in 2015 that resulted from a management workforce reduction program initiated in 2014. NOTE 6. Employee Benefit Plans, continued Qualified pension plan obligations are funded in accordance with regulatory requirements and with an objective of meeting or exceeding minimum funding requirements necessary to avoid restrictions on flexibility of plan operation and benefit payments. Although no contributions to the Company's qualified pension plans were required, CSX made a $30 million voluntary contribution during September 2016 . The Company may make an additional voluntary contribution in 2016 .

Debt and Credit Agreements

Debt and Credit Agreements	9 Months Ended
	Sep. 23, 2016
Debt Disclosure [Abstract]
Debt and Credit Agreements	Debt and Credit Agreements Total activity related to long-term debt as of the end of third quarter 2016 is shown in the table below. For fair value information related to the Company's long-term debt, see Note 9, Fair Value Measurements. (Dollars in millions) Current Portion Long-term Portion Total Long-term debt as of December 2015 (a) $ 20 $ 10,515 $ 10,535 2016 activity: Long-term debt repaid (19 ) — (19 ) Reclassifications 631 (631 ) — Discount, premium and other activity (1 ) (2 ) (3 ) Debt issue cost activity — 6 6 Long-term debt as of September 2016 $ 631 $ 9,888 $ 10,519 (a) Long-term debt as of December 2015 includes debt issue costs of $168 million that were reclassified from long-term assets to long-term debt on the consolidated balance sheet as a result of ASU, Interest - Imputation of Interest, which became effective for CSX during first quarter 2016. Credit Facility CSX has a $1 billion unsecured, revolving credit facility backed by a diverse syndicate of banks. This facility expires in May 2020 , and as of the date of this filing, the Company has no outstanding balances under this facility. The facility allows borrowings at floating (LIBOR-based) interest rates, plus a spread, depending upon CSX's senior unsecured debt ratings. LIBOR is the London Interbank Offered Rate which is a daily reference rate based on the interest rates at which banks offer to lend unsecured funds. As of third quarter 2016 , CSX was in compliance with all covenant requirements under this facility. Receivables Securitization Facility Subsequent to the third quarter, on September 28, 2016, the Company renewed and modified its existing receivables securitization facility. The facility was to expire in June 2017 and is now extended with a similar three -year term scheduled to expire in September 2019 . It was also modified to provide liquidity of up to $200 million , changed from $250 million , along with modifications to other terms. The purpose of this facility is to provide an alternative to commercial paper and a low cost source of short-term liquidity. As of the date of this filing, the Company has no outstanding balances under this facility.

Income Taxes

Income Taxes	9 Months Ended
	Sep. 23, 2016
Income Tax Disclosure [Abstract]
Income Taxes	Income Taxes There have been no material changes to the balance of unrecognized tax benefits reported at December 25, 2015 .

Fair Value Measurements

Fair Value Measurements	9 Months Ended
	Sep. 23, 2016
Fair Value Disclosures [Abstract]
Fair Value Measurements	Fair Value Measurements The Financial Instruments Topic in the ASC requires disclosures about fair value of financial instruments in annual reports as well as in quarterly reports. For CSX, this statement applies to certain investments and long-term debt. Disclosure of the fair value of pension plan assets is only required annually. Also, this rule clarifies the definition of fair value for financial reporting, establishes a framework for measuring fair value and requires additional disclosures about the use of fair value measurements. Various inputs are considered when determining the value of the Company's investments, pension plan assets and long-term debt. The inputs or methodologies used for valuing securities are not necessarily an indication of the risk associated with investing in these securities. These inputs are summarized in the three broad levels listed below. • Level 1 - observable market inputs that are unadjusted quoted prices for identical assets or liabilities in active markets; • Level 2 - other significant observable inputs (including quoted prices for similar securities, interest rates, credit risk, etc.); and • Level 3 - significant unobservable inputs (including the Company's own assumptions about the assumptions market participants would use in determining the fair value of investments). The valuation methods described below may produce a fair value calculation that may not be indicative of net realizable value or reflective of future fair values. Furthermore, while the Company believes its valuation methods are appropriate and consistent with other market participants, the use of different methodologies or assumptions to determine the fair value of certain financial instruments could result in a different fair value measurement at the reporting date. Investments The Company's investment assets, valued with assistance from a third-party trustee, consist of certificates of deposits, commercial paper, corporate bonds, government securities and auction rate securities and are carried at fair value on the consolidated balance sheet per the Fair Value Measurements and Disclosures Topic in the ASC. There are several valuation methodologies used for those assets as described below. • Certificates of Deposit and Commercial Paper (Level 2) : Valued at amortized cost, which approximates fair value; • Corporate Bonds and Government Securities (Level 2) : Valued using broker quotes that utilize observable market inputs; and • Auction Rate Securities (Level 3) : Valued using pricing models for which the assumptions utilize management’s estimates of market participant assumptions, because there is currently no active market for trading. The Company's investment assets are carried at fair value on the consolidated balance sheets as summarized in the table below. Additionally, the amortized cost basis of these investments was $223 million and $920 million as of September 23, 2016 and December 25, 2015 , respectively. NOTE 9. Fair Value Measurements, continued September 23, December 25, (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Certificates of Deposit and Commercial Paper $ — $ 150 $ — $ 150 $ — $ 810 $ — $ 810 Corporate Bonds — 62 — 62 — 73 — 73 Government Securities — 14 — 14 — 32 — 32 Auction Rate Securities — — — — — — 4 4 Total investments at fair value $ — $ 226 $ — $ 226 $ — $ 915 $ 4 $ 919 These investments have the following maturities: (Dollars in millions) September 23, December 25, Less than 1 year $ 152 $ 810 1 - 2 years 7 9 2 - 5 years 2 27 Greater than 5 years 65 73 Total $ 226 $ 919 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 fair values significantly different from their carrying amounts. The majority of the Company's long-term debt is valued with assistance from an independent third party adviser that utilizes closing transactions, market quotes or market values of comparable debt. For those instruments not valued by the independent adviser, 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 independent adviser. All of the inputs used to determine the fair value of the Company's long-term debt are Level 2 inputs. The fair value of outstanding debt fluctuates with changes in a number of factors. Such factors include, but are not limited to, interest rates, market conditions, credit ratings, values of similar financial instruments, size of the transaction, cash flow projections and comparable trades. Fair value will exceed carrying value when the current market interest rate is lower than the interest rate at which the debt was originally issued. The fair value of a company's debt is a measure of its current value under present market conditions. It does not impact the financial statements under current accounting rules. The fair value and carrying value of the Company's long-term debt is as follows: (Dollars in millions) September 23, December 25, 2015 Long-term Debt (Including Current Maturities): Fair Value $ 12,235 $ 11,340 Carrying Value 10,519 10,535

Other Comprehensive Income (Los

Other Comprehensive Income (Loss)	9 Months Ended
	Sep. 23, 2016
Equity [Abstract]
Other Comprehensive Income (Loss)	Other Comprehensive Income (Loss) CSX reports comprehensive earnings or loss in accordance with the Comprehensive Income Topic in the ASC in the Consolidated Comprehensive Income Statement. Total comprehensive earnings are defined as 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 equal net earnings plus or minus adjustments for pension and other post-retirement liabilities. Total comprehensive earnings represent the activity for a period net of tax and were $465 million and $518 million for third quarters, and $1,282 million and $1,523 million for nine months 2016 and 2015 , respectively. While total comprehensive earnings is the activity in a period and is largely driven by net earnings in that period, accumulated other comprehensive income or loss (“AOCI”) represents the cumulative balance of other comprehensive income, net of tax, as of the balance sheet date. For CSX, AOCI is primarily the cumulative balance related to pension and other post-retirement benefit adjustments and CSX's share of AOCI of equity method investees. Changes in the AOCI balance by component are shown in the table below. Amounts reclassified in pension and other post-employment benefits to net earnings relate to the amortization of actuarial losses and are included in labor and fringe on the consolidated income statements. See Note 6. Employee Benefit Plans 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 materials, supplies and other on the consolidated income statements. Pension and Other Post-Employment Benefits Other Accumulated Other Comprehensive Income (Loss) (Dollars in millions) Balance December 25, 2015, Net of Tax $ (601 ) $ (64 ) $ (665 ) Other Comprehensive Income (Loss) Amounts Reclassified to Net Earnings 38 4 42 Tax Expense (14 ) (2 ) (16 ) Total Other Comprehensive Income (Loss) 24 2 26 Balance September 23, 2016, Net of Tax $ (577 ) $ (62 ) $ (639 )

Summarized Consolidating Financ

Summarized Consolidating Financial Data	9 Months Ended
	Sep. 23, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Summarized Consolidating Financial Data	Summarized Consolidating Financial Data In 2007, CSXT, a wholly-owned subsidiary of CSX Corporation, sold secured equipment notes maturing in 2023 in a registered public offering. CSX has fully and unconditionally guaranteed the notes. In connection with the notes, the Company is providing the following condensed consolidating financial information in accordance with SEC disclosure requirements. Each entity in the consolidating financial information follows the same accounting policies as described in the consolidated financial statements, except for the use of the equity method of accounting to reflect ownership interests in subsidiaries which are eliminated upon consolidation and the allocation of certain expenses of CSX incurred for the benefit of its subsidiaries. Condensed consolidating financial information for the obligor, CSXT, and parent guarantor, CSX, is shown in the tables below. Consolidating Income Statements (Dollars in millions) Third Quarter 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 2,691 $ 19 $ 2,710 Expense (63 ) 1,960 (28 ) 1,869 Operating Income 63 731 47 841 Equity in Earnings of Subsidiaries 505 1 (506 ) — Interest (Expense) / Benefit (141 ) (7 ) 9 (139 ) Other Income / (Expense) - Net — 9 4 13 Earnings Before Income Taxes 427 734 (446 ) 715 Income Tax Benefit / (Expense) 28 (268 ) (20 ) (260 ) Net Earnings $ 455 $ 466 $ (466 ) $ 455 Total Comprehensive Earnings $ 465 $ 467 $ (467 ) $ 465 Third Quarter 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 2,920 $ 19 $ 2,939 Expense (154 ) 2,182 (22 ) 2,006 Operating Income 154 738 41 933 Equity in Earnings of Subsidiaries 496 — (496 ) — Interest (Expense) / Benefit (134 ) (8 ) 6 (136 ) Other Income / (Expense) - Net (1 ) 5 (2 ) 2 Earnings Before Income Taxes 515 735 (451 ) 799 Income Tax (Expense) / Benefit (8 ) (273 ) (11 ) (292 ) Net Earnings $ 507 $ 462 $ (462 ) $ 507 Total Comprehensive Earnings $ 518 $ 462 $ (462 ) $ 518 NOTE 11. Summarized Consolidating Financial Data, continued Consolidating Income Statements (Dollars in millions) Nine Months 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 7,974 $ 58 $ 8,032 Expense (202 ) 5,985 (136 ) 5,647 Operating Income 202 1,989 194 2,385 Equity in Earnings of Subsidiaries 1,399 1 (1,400 ) — Interest (Expense) / Benefit (425 ) (27 ) 29 (423 ) Other Income / (Expense) - Net 1 24 3 28 Earnings Before Income Taxes 1,177 1,987 (1,174 ) 1,990 Income Tax (Expense) / Benefit 79 (735 ) (78 ) (734 ) Net Earnings $ 1,256 $ 1,252 $ (1,252 ) $ 1,256 Total Comprehensive Earnings $ 1,282 $ 1,253 $ (1,253 ) $ 1,282 Nine Months 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 8,972 $ 58 $ 9,030 Expense (448 ) 6,765 (80 ) 6,237 Operating Income 448 2,207 138 2,793 Equity in Earnings of Subsidiaries 1,482 — (1,482 ) — Interest (Expense) / Benefit (399 ) (24 ) 19 (404 ) Other Income / (Expense) - Net (4 ) 18 (6 ) 8 Earnings Before Income Taxes 1,527 2,201 (1,331 ) 2,397 Income Tax (Expense) / Benefit (25 ) (824 ) (46 ) (895 ) Net Earnings $ 1,502 $ 1,377 $ (1,377 ) $ 1,502 Total Comprehensive Earnings $ 1,523 $ 1,374 $ (1,374 ) $ 1,523 Summarized Consolidating Financial Data, continued Consolidating Balance Sheet (Dollars in millions) September 23, 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated ASSETS Current Assets Cash and Cash Equivalents $ 448 $ 130 $ 25 $ 603 Short-term Investments 150 — 2 152 Accounts Receivable - Net (3 ) 197 731 925 Receivable from Affiliates 1,158 2,504 (3,662 ) — Materials and Supplies — 397 — 397 Other Current Assets 11 56 19 86 Total Current Assets 1,764 3,284 (2,885 ) 2,163 Properties 1 40,052 2,667 42,720 Accumulated Depreciation (1 ) (10,508 ) (1,429 ) (11,938 ) Properties - Net — 29,544 1,238 30,782 Investments in Conrail — — 830 830 Affiliates and Other Companies (39 ) 628 14 603 Investments in Consolidated Subsidiaries 23,678 — (23,678 ) — Other Long-term Assets 3 403 (103 ) 303 Total Assets $ 25,406 $ 33,859 $ (24,584 ) $ 34,681 LIABILITIES AND SHAREHOLDERS' EQUITY Current Liabilities Accounts Payable $ 150 $ 679 $ 30 $ 859 Labor and Fringe Benefits Payable 36 371 43 450 Payable to Affiliates 3,601 445 (4,046 ) — Casualty, Environmental and Other Reserves — 109 15 124 Current Maturities of Long-term Debt 613 19 (1 ) 631 Income and Other Taxes Payable (334 ) 394 30 90 Other Current Liabilities — 107 2 109 Total Current Liabilities 4,066 2,124 (3,927 ) 2,263 Casualty, Environmental and Other Reserves — 202 48 250 Long-term Debt 9,127 761 — 9,888 Deferred Income Taxes - Net (206 ) 9,470 241 9,505 Other Long-term Liabilities 763 468 (126 ) 1,105 Total Liabilities $ 13,750 $ 13,025 $ (3,764 ) $ 23,011 Shareholders' Equity Common Stock, $1 Par Value $ 937 $ 181 $ (181 ) $ 937 Other Capital 125 5,094 (5,094 ) 125 Retained Earnings 11,233 15,575 (15,575 ) 11,233 Accumulated Other Comprehensive Loss (639 ) (30 ) 30 (639 ) Noncontrolling Interest — 14 — 14 Total Shareholders' Equity $ 11,656 $ 20,834 $ (20,820 ) $ 11,670 Total Liabilities and Shareholders' Equity $ 25,406 $ 33,859 $ (24,584 ) $ 34,681 Summarized Consolidating Financial Data, continued Consolidating Balance Sheet (Dollars in millions) December 25, 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated ASSETS Current Assets Cash and Cash Equivalents $ 444 $ 175 $ 9 $ 628 Short-term Investments 810 — — 810 Accounts Receivable - Net 1 198 783 982 Receivable from Affiliates 1,092 2,038 (3,130 ) — Materials and Supplies — 350 — 350 Other Current Assets (59 ) 120 9 70 Total Current Assets 2,288 2,881 (2,329 ) 2,840 Properties 1 38,964 2,609 41,574 Accumulated Depreciation (1 ) (10,016 ) (1,383 ) (11,400 ) Properties - Net — 28,948 1,226 30,174 Investments in Conrail — — 803 803 Affiliates and Other Companies (39 ) 658 (28 ) 591 Investment in Consolidated Subsidiaries 22,755 — (22,755 ) — Other Long-term Assets 8 399 (70 ) 337 Total Assets $ 25,012 $ 32,886 $ (23,153 ) $ 34,745 LIABILITIES AND SHAREHOLDERS' EQUITY Current Liabilities Accounts Payable $ 108 $ 626 $ 30 $ 764 Labor and Fringe Benefits Payable 36 407 47 490 Payable to Affiliates 2,954 437 (3,391 ) — Casualty, Environmental and Other Reserves — 115 16 131 Current Maturities of Long-term Debt 1 19 — 20 Income and Other Taxes Payable (87 ) 183 12 108 Other Current Liabilities — 437 2 439 Total Current Liabilities 3,012 2,224 (3,284 ) 1,952 Casualty, Environmental and Other Reserves — 219 50 269 Long-term Debt 9,732 783 — 10,515 Deferred Income Taxes - Net (188 ) 9,141 226 9,179 Other Long-term Liabilities 804 484 (126 ) 1,162 Total Liabilities $ 13,360 $ 12,851 $ (3,134 ) $ 23,077 Shareholders' Equity Common Stock, $1 Par Value $ 966 $ 181 $ (181 ) $ 966 Other Capital 113 5,091 (5,091 ) 113 Retained Earnings 11,238 14,774 (14,774 ) 11,238 Accumulated Other Comprehensive Loss (665 ) (31 ) 31 (665 ) Noncontrolling Minority Interest — 20 (4 ) 16 Total Shareholders' Equity $ 11,652 $ 20,035 $ (20,019 ) $ 11,668 Total Liabilities and Shareholders' Equity $ 25,012 $ 32,886 $ (23,153 ) $ 34,745 Summarized Consolidating Financial Data, continued Consolidating Cash Flow Statements (Dollars in millions) Nine Months 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated Operating Activities Net Cash Provided by (Used in) Operating Activities $ 644 $ 2,089 $ (245 ) $ 2,488 Investing Activities Property Additions — (1,469 ) (121 ) (1,590 ) Purchases of Short-term Investments (410 ) — — (410 ) Proceeds from Sales of Short-term Investments 1,070 — — 1,070 Proceeds from Property Dispositions — 11 — 11 Other Investing Activities (3 ) 96 (67 ) 26 Net Cash Provided by (Used in) Investing Activities 657 (1,362 ) (188 ) (893 ) Financing Activities Long-term Debt Issued — — — — Long-term Debt Repaid — (18 ) (1 ) (19 ) Dividends Paid (513 ) (450 ) 450 (513 ) Stock Options Exercised — — — — Shares Repurchased (778 ) — — (778 ) Other Financing Activities (6 ) (304 ) — (310 ) Net Cash Provided by (Used in) Financing Activities (1,297 ) (772 ) 449 (1,620 ) Net Increase (Decrease) in Cash and Cash Equivalents 4 (45 ) 16 (25 ) Cash and Cash Equivalents at Beginning of Period 444 175 9 628 Cash and Cash Equivalents at End of Period $ 448 $ 130 $ 25 $ 603 NOTE 11. Summarized Consolidating Financial Data, continued Consolidating Cash Flow Statements (Dollars in millions) Nine Months 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated Operating Activities Net Cash Provided by (Used in) Operating Activities $ 637 $ 2,313 $ (438 ) $ 2,512 Investing Activities Property Additions — (1,794 ) (115 ) (1,909 ) Purchases of Short-term Investments (1,170 ) — — (1,170 ) Proceeds from Sales of Short-term Investments 995 — 45 1,040 Proceeds from Property Dispositions — 46 — 46 Other Investing Activities (11 ) 93 (40 ) 42 Net Cash Provided by (Used in) Investing Activities (186 ) (1,655 ) (110 ) (1,951 ) Financing Activities Long-term Debt Issued 600 — — 600 Long-term Debt Repaid (200 ) (28 ) — (228 ) Dividends Paid (512 ) (563 ) 563 (512 ) Stock Options Exercised — — — — Shares Repurchased (546 ) — — (546 ) Other Financing Activities 8 1 (12 ) (3 ) Net Cash Provided by (Used in) Financing Activities (650 ) (590 ) 551 (689 ) Net Increase (Decrease) in Cash and Cash Equivalents (199 ) 68 3 (128 ) Cash and Cash Equivalents at Beginning of Period 510 100 59 669 Cash and Cash Equivalents at End of Period $ 311 $ 168 $ 62 $ 541

Nature of Operations and Sign18

Nature of Operations and Significant Accounting Policies (Policies)	9 Months Ended
	Sep. 23, 2016
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Basis of Presentation	In the opinion of management, the accompanying consolidated financial statements contain all normal, recurring adjustments necessary to fairly present the following: • Consolidated income statements for the nine months ended September 23, 2016 and September 25, 2015 ; • Consolidated comprehensive income statements for the nine months ended September 23, 2016 and September 25, 2015 ; • Consolidated balance sheets at September 23, 2016 and December 25, 2015 ; and • Consolidated cash flow statements for the nine months ended September 23, 2016 and September 25, 2015 . 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 and any subsequently filed current reports on Form 8-K.
Fiscal Year	CSX follows a 52 /53 week fiscal reporting calendar with the last day of each reporting period ending on a Friday: • The third fiscal quarters of 2016 and 2015 consisted of 13 weeks ending on September 23, 2016 and September 25, 2015 , respectively. • Fiscal year 2016 will consist of 53 weeks ending on December 30, 2016 . • Fiscal year 2015 consisted of 52 weeks ending on December 25, 2015 . Except as otherwise specified, references to “ third quarter(s)” or “ nine months” indicate CSX's fiscal periods ending September 23, 2016 and September 25, 2015 , and references to "year-end" indicate the fiscal year ended December 25, 2015 .
Allowance for Doubtful Accounts	The Company maintains an allowance for doubtful accounts on uncollectible amounts related to freight receivables, government reimbursement receivables, claims for damages and other various receivables. The allowance is based upon the creditworthiness of customers, historical experience, the age of the receivable and current market and economic conditions. Uncollectible amounts are charged against the allowance account.
New Accounting Pronouncements	In March 2016, the Financial Accounting Standards Board ("FASB") issued Accounting Standards Update ("ASU"), Improvements to Employee Share-based Payment Accounting , which requires excess tax benefits and deficiencies to be recorded as income tax expense or benefit in the income statement rather than being recorded in additional paid-in capital. The Company adopted the provisions of this rule during the second quarter of 2016 which did not have a material effect on the Company's financial condition, results of operations or liquidity. In November 2015, the FASB issued ASU, Balance Sheet Classification of Deferred Taxes , which requires that all deferred income taxes be classified as noncurrent in the balance sheet, rather than being separated into current and noncurrent amounts. The Company adopted the provisions of this rule during second quarter 2016 and applied them retrospectively. Current deferred income tax assets of $126 million as of December 25, 2015 have been reclassified and reported as a reduction of deferred income tax liabilities on the balance sheet. Adoption did not have a material effect on the Company's financial condition, results of operations or liquidity. In February 2016, the FASB issued ASU, Leases , which will require lessees to recognize most leases on their balance sheets as a right-of-use asset with a corresponding lease liability, and lessors to recognize a net lease investment. Additional qualitative and quantitative disclosures will also be required. This standard is effective for fiscal years beginning after December 15, 2018. While the Company is still assessing the impact of this standard, CSX does not believe this standard will have a material effect on the Company's financial condition, results of operations or liquidity.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	9 Months Ended
	Sep. 23, 2016
Earnings Per Share [Abstract]
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: Third Quarters Nine Months 2016 2015 2016 2015 Numerator (Dollars in millions) : Net Earnings $ 455 $ 507 $ 1,256 $ 1,502 Dividend Equivalents on Restricted Stock — — (1 ) (1 ) Net Earnings, Attributable to Common Shareholders $ 455 507 $ 1,255 1,501 Denominator (Units in millions) : Average Common Shares Outstanding 942 981 952 986 Other Potentially Dilutive Common Shares 1 1 1 1 Average Common Shares Outstanding, Assuming Dilution 943 982 953 987 Net Earnings Per Share, Basic $ 0.48 $ 0.52 $ 1.32 $ 1.52 Net Earnings Per Share, Assuming Dilution $ 0.48 $ 0.52 $ 1.32 $ 1.52

Share-Based Compensation (Table

Share-Based Compensation (Tables)	9 Months Ended
	Sep. 23, 2016
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation and Related Income Tax Benefit	Total pre-tax expense associated with all share-based compensation and the related income tax benefit are as follows: Third Quarters Nine Months (Dollars in millions) 2016 2015 2016 2015 Share-Based Compensation Expense $ 9 $ 2 $ 24 $ 20 Income Tax Benefit 3 1 9 8

Casualty, Environmental and O21

Casualty, Environmental and Other Reserves (Tables)	9 Months Ended
	Sep. 23, 2016
Casualty, Environmental and Other Reserves [Abstract]
Schedule of Casualty, Environmental and Other Reserves	Casualty, environmental and other reserves are considered critical accounting estimates due to the need for significant management judgment. They are provided for in the consolidated balance sheets as shown in the table below: September 23, December 25, (Dollars in millions) Current Long-term Total Current Long-term Total Casualty: Personal Injury $ 57 $ 135 $ 192 $ 57 $ 147 $ 204 Asbestos 4 42 46 9 44 53 Occupational 4 5 9 3 9 12 Total Casualty 65 182 247 69 200 269 Environmental 41 38 79 42 40 82 Other 18 30 48 20 29 49 Total $ 124 $ 250 $ 374 $ 131 $ 269 $ 400

Employee Benefit Plans (Tables)

Employee Benefit Plans (Tables)	9 Months Ended
	Sep. 23, 2016
Compensation and Retirement Disclosure [Abstract]
Components of Expense/(Income) Related to Net Benefit Expense	The following table describes the components of expense / (income) related to net benefit expense recorded in labor and fringe on the income statement. Pension Benefits (Dollars in millions) Third Quarters Nine Months 2016 2015 2016 2015 Service Cost $ 12 $ 12 $ 36 $ 34 Interest Cost 29 29 89 87 Expected Return on Plan Assets (39 ) (41 ) (118 ) (122 ) Amortization of Net Loss 12 17 36 52 Net Periodic Benefit Cost 14 17 43 51 Special Termination Benefits – Workforce Reduction Program (a) — — — 7 Total Expense $ 14 $ 17 $ 43 $ 58 Other Post-retirement Benefits (Dollars in millions) Third Quarters Nine Months 2016 2015 2016 2015 Service Cost $ — $ 2 $ 1 $ 3 Interest Cost 3 3 9 10 Amortization of Net Loss 1 1 2 3 Amortization of Prior Service Costs — (1 ) — (1 ) Total Expense $ 4 $ 5 $ 12 $ 15 (a) Special termination benefits were charges in 2015 that resulted from a management workforce reduction program initiated in 2014.

Debt and Credit Agreements (Tab

Debt and Credit Agreements (Tables)	9 Months Ended
	Sep. 23, 2016
Debt Disclosure [Abstract]
Activity Related to Long-Term Debt	Total activity related to long-term debt as of the end of third quarter 2016 is shown in the table below. For fair value information related to the Company's long-term debt, see Note 9, Fair Value Measurements. (Dollars in millions) Current Portion Long-term Portion Total Long-term debt as of December 2015 (a) $ 20 $ 10,515 $ 10,535 2016 activity: Long-term debt repaid (19 ) — (19 ) Reclassifications 631 (631 ) — Discount, premium and other activity (1 ) (2 ) (3 ) Debt issue cost activity — 6 6 Long-term debt as of September 2016 $ 631 $ 9,888 $ 10,519 (a) Long-term debt as of December 2015 includes debt issue costs of $168 million that were reclassified from long-term assets to long-term debt on the consolidated balance sheet as a result of ASU, Interest - Imputation of Interest, which became effective for CSX during first quarter 2016.

Fair Value Measurements (Tables

Fair Value Measurements (Tables)	9 Months Ended
	Sep. 23, 2016
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 as summarized in the table below. Additionally, the amortized cost basis of these investments was $223 million and $920 million as of September 23, 2016 and December 25, 2015 , respectively. NOTE 9. Fair Value Measurements, continued September 23, December 25, (Dollars in Millions) Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Certificates of Deposit and Commercial Paper $ — $ 150 $ — $ 150 $ — $ 810 $ — $ 810 Corporate Bonds — 62 — 62 — 73 — 73 Government Securities — 14 — 14 — 32 — 32 Auction Rate Securities — — — — — — 4 4 Total investments at fair value $ — $ 226 $ — $ 226 $ — $ 915 $ 4 $ 919
Schedule of Investment Maturities	These investments have the following maturities: (Dollars in millions) September 23, December 25, Less than 1 year $ 152 $ 810 1 - 2 years 7 9 2 - 5 years 2 27 Greater than 5 years 65 73 Total $ 226 $ 919
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: (Dollars in millions) September 23, December 25, 2015 Long-term Debt (Including Current Maturities): Fair Value $ 12,235 $ 11,340 Carrying Value 10,519 10,535

Other Comprehensive Income (L25

Other Comprehensive Income (Loss) (Tables)	9 Months Ended
	Sep. 23, 2016
Equity [Abstract]
Changes in AOCI balance by Component	Changes in the AOCI balance by component are shown in the table below. Amounts reclassified in pension and other post-employment benefits to net earnings relate to the amortization of actuarial losses and are included in labor and fringe on the consolidated income statements. See Note 6. Employee Benefit Plans 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 materials, supplies and other on the consolidated income statements. Pension and Other Post-Employment Benefits Other Accumulated Other Comprehensive Income (Loss) (Dollars in millions) Balance December 25, 2015, Net of Tax $ (601 ) $ (64 ) $ (665 ) Other Comprehensive Income (Loss) Amounts Reclassified to Net Earnings 38 4 42 Tax Expense (14 ) (2 ) (16 ) Total Other Comprehensive Income (Loss) 24 2 26 Balance September 23, 2016, Net of Tax $ (577 ) $ (62 ) $ (639 )

Summarized Consolidating Fina26

Summarized Consolidating Financial Data (Tables)	9 Months Ended
	Sep. 23, 2016
Condensed Financial Information of Parent Company Only Disclosure [Abstract]
Consolidating Income Statements	Consolidating Income Statements (Dollars in millions) Third Quarter 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 2,691 $ 19 $ 2,710 Expense (63 ) 1,960 (28 ) 1,869 Operating Income 63 731 47 841 Equity in Earnings of Subsidiaries 505 1 (506 ) — Interest (Expense) / Benefit (141 ) (7 ) 9 (139 ) Other Income / (Expense) - Net — 9 4 13 Earnings Before Income Taxes 427 734 (446 ) 715 Income Tax Benefit / (Expense) 28 (268 ) (20 ) (260 ) Net Earnings $ 455 $ 466 $ (466 ) $ 455 Total Comprehensive Earnings $ 465 $ 467 $ (467 ) $ 465 Third Quarter 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 2,920 $ 19 $ 2,939 Expense (154 ) 2,182 (22 ) 2,006 Operating Income 154 738 41 933 Equity in Earnings of Subsidiaries 496 — (496 ) — Interest (Expense) / Benefit (134 ) (8 ) 6 (136 ) Other Income / (Expense) - Net (1 ) 5 (2 ) 2 Earnings Before Income Taxes 515 735 (451 ) 799 Income Tax (Expense) / Benefit (8 ) (273 ) (11 ) (292 ) Net Earnings $ 507 $ 462 $ (462 ) $ 507 Total Comprehensive Earnings $ 518 $ 462 $ (462 ) $ 518 Consolidating Income Statements (Dollars in millions) Nine Months 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 7,974 $ 58 $ 8,032 Expense (202 ) 5,985 (136 ) 5,647 Operating Income 202 1,989 194 2,385 Equity in Earnings of Subsidiaries 1,399 1 (1,400 ) — Interest (Expense) / Benefit (425 ) (27 ) 29 (423 ) Other Income / (Expense) - Net 1 24 3 28 Earnings Before Income Taxes 1,177 1,987 (1,174 ) 1,990 Income Tax (Expense) / Benefit 79 (735 ) (78 ) (734 ) Net Earnings $ 1,256 $ 1,252 $ (1,252 ) $ 1,256 Total Comprehensive Earnings $ 1,282 $ 1,253 $ (1,253 ) $ 1,282 Nine Months 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated Revenue $ — $ 8,972 $ 58 $ 9,030 Expense (448 ) 6,765 (80 ) 6,237 Operating Income 448 2,207 138 2,793 Equity in Earnings of Subsidiaries 1,482 — (1,482 ) — Interest (Expense) / Benefit (399 ) (24 ) 19 (404 ) Other Income / (Expense) - Net (4 ) 18 (6 ) 8 Earnings Before Income Taxes 1,527 2,201 (1,331 ) 2,397 Income Tax (Expense) / Benefit (25 ) (824 ) (46 ) (895 ) Net Earnings $ 1,502 $ 1,377 $ (1,377 ) $ 1,502 Total Comprehensive Earnings $ 1,523 $ 1,374 $ (1,374 ) $ 1,523
Consolidating Balance Sheet	Consolidating Balance Sheet (Dollars in millions) September 23, 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated ASSETS Current Assets Cash and Cash Equivalents $ 448 $ 130 $ 25 $ 603 Short-term Investments 150 — 2 152 Accounts Receivable - Net (3 ) 197 731 925 Receivable from Affiliates 1,158 2,504 (3,662 ) — Materials and Supplies — 397 — 397 Other Current Assets 11 56 19 86 Total Current Assets 1,764 3,284 (2,885 ) 2,163 Properties 1 40,052 2,667 42,720 Accumulated Depreciation (1 ) (10,508 ) (1,429 ) (11,938 ) Properties - Net — 29,544 1,238 30,782 Investments in Conrail — — 830 830 Affiliates and Other Companies (39 ) 628 14 603 Investments in Consolidated Subsidiaries 23,678 — (23,678 ) — Other Long-term Assets 3 403 (103 ) 303 Total Assets $ 25,406 $ 33,859 $ (24,584 ) $ 34,681 LIABILITIES AND SHAREHOLDERS' EQUITY Current Liabilities Accounts Payable $ 150 $ 679 $ 30 $ 859 Labor and Fringe Benefits Payable 36 371 43 450 Payable to Affiliates 3,601 445 (4,046 ) — Casualty, Environmental and Other Reserves — 109 15 124 Current Maturities of Long-term Debt 613 19 (1 ) 631 Income and Other Taxes Payable (334 ) 394 30 90 Other Current Liabilities — 107 2 109 Total Current Liabilities 4,066 2,124 (3,927 ) 2,263 Casualty, Environmental and Other Reserves — 202 48 250 Long-term Debt 9,127 761 — 9,888 Deferred Income Taxes - Net (206 ) 9,470 241 9,505 Other Long-term Liabilities 763 468 (126 ) 1,105 Total Liabilities $ 13,750 $ 13,025 $ (3,764 ) $ 23,011 Shareholders' Equity Common Stock, $1 Par Value $ 937 $ 181 $ (181 ) $ 937 Other Capital 125 5,094 (5,094 ) 125 Retained Earnings 11,233 15,575 (15,575 ) 11,233 Accumulated Other Comprehensive Loss (639 ) (30 ) 30 (639 ) Noncontrolling Interest — 14 — 14 Total Shareholders' Equity $ 11,656 $ 20,834 $ (20,820 ) $ 11,670 Total Liabilities and Shareholders' Equity $ 25,406 $ 33,859 $ (24,584 ) $ 34,681 Certain prior year data has been reclassified to conform to the current presentation. Consolidating Balance Sheet (Dollars in millions) December 25, 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated ASSETS Current Assets Cash and Cash Equivalents $ 444 $ 175 $ 9 $ 628 Short-term Investments 810 — — 810 Accounts Receivable - Net 1 198 783 982 Receivable from Affiliates 1,092 2,038 (3,130 ) — Materials and Supplies — 350 — 350 Other Current Assets (59 ) 120 9 70 Total Current Assets 2,288 2,881 (2,329 ) 2,840 Properties 1 38,964 2,609 41,574 Accumulated Depreciation (1 ) (10,016 ) (1,383 ) (11,400 ) Properties - Net — 28,948 1,226 30,174 Investments in Conrail — — 803 803 Affiliates and Other Companies (39 ) 658 (28 ) 591 Investment in Consolidated Subsidiaries 22,755 — (22,755 ) — Other Long-term Assets 8 399 (70 ) 337 Total Assets $ 25,012 $ 32,886 $ (23,153 ) $ 34,745 LIABILITIES AND SHAREHOLDERS' EQUITY Current Liabilities Accounts Payable $ 108 $ 626 $ 30 $ 764 Labor and Fringe Benefits Payable 36 407 47 490 Payable to Affiliates 2,954 437 (3,391 ) — Casualty, Environmental and Other Reserves — 115 16 131 Current Maturities of Long-term Debt 1 19 — 20 Income and Other Taxes Payable (87 ) 183 12 108 Other Current Liabilities — 437 2 439 Total Current Liabilities 3,012 2,224 (3,284 ) 1,952 Casualty, Environmental and Other Reserves — 219 50 269 Long-term Debt 9,732 783 — 10,515 Deferred Income Taxes - Net (188 ) 9,141 226 9,179 Other Long-term Liabilities 804 484 (126 ) 1,162 Total Liabilities $ 13,360 $ 12,851 $ (3,134 ) $ 23,077 Shareholders' Equity Common Stock, $1 Par Value $ 966 $ 181 $ (181 ) $ 966 Other Capital 113 5,091 (5,091 ) 113 Retained Earnings 11,238 14,774 (14,774 ) 11,238 Accumulated Other Comprehensive Loss (665 ) (31 ) 31 (665 ) Noncontrolling Minority Interest — 20 (4 ) 16 Total Shareholders' Equity $ 11,652 $ 20,035 $ (20,019 ) $ 11,668 Total Liabilities and Shareholders' Equity $ 25,012 $ 32,886 $ (23,153 ) $ 34,745
Consolidating Cash Flow Statements	Consolidating Cash Flow Statements (Dollars in millions) Nine Months 2016 CSX Corporation CSX Transportation Eliminations and Other Consolidated Operating Activities Net Cash Provided by (Used in) Operating Activities $ 644 $ 2,089 $ (245 ) $ 2,488 Investing Activities Property Additions — (1,469 ) (121 ) (1,590 ) Purchases of Short-term Investments (410 ) — — (410 ) Proceeds from Sales of Short-term Investments 1,070 — — 1,070 Proceeds from Property Dispositions — 11 — 11 Other Investing Activities (3 ) 96 (67 ) 26 Net Cash Provided by (Used in) Investing Activities 657 (1,362 ) (188 ) (893 ) Financing Activities Long-term Debt Issued — — — — Long-term Debt Repaid — (18 ) (1 ) (19 ) Dividends Paid (513 ) (450 ) 450 (513 ) Stock Options Exercised — — — — Shares Repurchased (778 ) — — (778 ) Other Financing Activities (6 ) (304 ) — (310 ) Net Cash Provided by (Used in) Financing Activities (1,297 ) (772 ) 449 (1,620 ) Net Increase (Decrease) in Cash and Cash Equivalents 4 (45 ) 16 (25 ) Cash and Cash Equivalents at Beginning of Period 444 175 9 628 Cash and Cash Equivalents at End of Period $ 448 $ 130 $ 25 $ 603 NOTE 11. Summarized Consolidating Financial Data, continued Consolidating Cash Flow Statements (Dollars in millions) Nine Months 2015 CSX Corporation CSX Transportation Eliminations and Other Consolidated Operating Activities Net Cash Provided by (Used in) Operating Activities $ 637 $ 2,313 $ (438 ) $ 2,512 Investing Activities Property Additions — (1,794 ) (115 ) (1,909 ) Purchases of Short-term Investments (1,170 ) — — (1,170 ) Proceeds from Sales of Short-term Investments 995 — 45 1,040 Proceeds from Property Dispositions — 46 — 46 Other Investing Activities (11 ) 93 (40 ) 42 Net Cash Provided by (Used in) Investing Activities (186 ) (1,655 ) (110 ) (1,951 ) Financing Activities Long-term Debt Issued 600 — — 600 Long-term Debt Repaid (200 ) (28 ) — (228 ) Dividends Paid (512 ) (563 ) 563 (512 ) Stock Options Exercised — — — — Shares Repurchased (546 ) — — (546 ) Other Financing Activities 8 1 (12 ) (3 ) Net Cash Provided by (Used in) Financing Activities (650 ) (590 ) 551 (689 ) Net Increase (Decrease) in Cash and Cash Equivalents (199 ) 68 3 (128 ) Cash and Cash Equivalents at Beginning of Period 510 100 59 669 Cash and Cash Equivalents at End of Period $ 311 $ 168 $ 62 $ 541

Nature of Operations and Sign27

Nature of Operations and Significant Accounting Policies - Narrative (Details) mi in Thousands, $ in Millions	Sep. 23, 2016USD ($)statemi	Dec. 25, 2015USD ($)
Background
Total number of rail route miles | mi	21
Number of states rail network serves | state	23
Allowance for Doubtful Accounts
Allowance for doubtful accounts	$ 29	$ 37
New Accounting Pronouncement, Early Adoption, Effect
Allowance for Doubtful Accounts
Deferred tax assets net, current		(126)
Deferred tax liabilities, net, current	$ 132	$ 126

Earnings Per Share - Computatio

Earnings Per Share - Computation of Basic Earnings Per Share, Assuming Dilution (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Numerator:
Net Earnings	$ 455	$ 507	$ 1,256	$ 1,502
Dividend Equivalents on Restricted Stock	0	0	(1)	(1)
Net Earnings, Attributable to Common Shareholders	$ 455	$ 507	$ 1,255	$ 1,501
Denominator:
Average Common Shares Outstanding (in shares)	942	981	952	986
Other Potentially Dilutive Common Shares (in shares)	1	1	1	1
Average Common Shares Outstanding, Assuming Dilution (in shares)	943	982	953	987
Net Earnings Per Share, Basic (in dollars per share)	$ 0.48	$ 0.52	$ 1.32	$ 1.52
Net Earnings Per Share, Assuming Dilution (in dollars per share)	$ 0.48	$ 0.52	$ 1.32	$ 1.52

Earnings Per Share - Narrative

Earnings Per Share - Narrative (Details) - USD ($) shares in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015	Apr. 30, 2015
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Share repurchase program					$ 2,000,000,000
Shares repurchased value	$ 263,000,000	$ 262,000,000	$ 778,000,000	$ 546,000,000
Shares repurchased during the period (in shares)	10	9	30	17
Employee Stock Option
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities	2.4		3.8

Share-Based Compensation - Narr

Share-Based Compensation - Narrative (Details)	9 Months Ended
	Sep. 23, 2016$ / sharesshares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock options granted (in shares)	2,400,000
Fair value of stock options (in dollars per share) | $ / shares	$ 4.68
Restricted Stock
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Award vesting period (in years)	3 years
Employee Stock Option
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
2016 - 2018 LTIP
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Percentage of payout subject to downward adjustment (up to)	30.00%
2016 - 2018 LTIP | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout range for participants (as a percent)	0.00%
2016 - 2018 LTIP | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Payout range for participants (as a percent)	200.00%
2016 - 2018 LTIP | Performance Units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	839,000
Percentage of grants with performance vesting, operating ratio	50.00%
Percentage of grants with performance vesting, return on assets	50.00%
Performance unit equivalent of CSX common stock (in shares)	1
2016 - 2018 LTIP | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Awards granted (in shares)	419,000

Share-Based Compensation - Shar

Share-Based Compensation - Share-Based Compensation and Related Income Tax Benefit (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Disclosure of Compensation Related Costs, Share-based Payments [Abstract]
Share-Based Compensation Expense	$ 9	$ 2	$ 24	$ 20
Income Tax Benefit	$ 3	$ 1	$ 9	$ 8

Casualty, Environmental and O32

Casualty, Environmental and Other Reserves - Schedule of Casualty, Environmental and Other Reserves (Details) - USD ($) $ in Millions	Sep. 23, 2016	Dec. 25, 2015
Loss Contingencies [Line Items]
Current	$ 124	$ 131
Long-term	250	269
Total	374	400
Total Casualty
Loss Contingencies [Line Items]
Current	65	69
Long-term	182	200
Total	247	269
Personal Injury
Loss Contingencies [Line Items]
Current	57	57
Long-term	135	147
Total	192	204
Asbestos
Loss Contingencies [Line Items]
Current	4	9
Long-term	42	44
Total	46	53
Occupational
Loss Contingencies [Line Items]
Current	4	3
Long-term	5	9
Total	9	12
Environmental
Loss Contingencies [Line Items]
Current	41	42
Long-term	38	40
Total	79	82
Other
Loss Contingencies [Line Items]
Current	18	20
Long-term	30	29
Total	$ 48	$ 49

Casualty, Environmental and O33

Casualty, Environmental and Other Reserves - Narrative (Details)	9 Months Ended
	Sep. 23, 2016USD ($)claimsite	Dec. 25, 2015USD ($)
All Contingencies Reserves [Line Items]
Total reserves	$ 374,000,000	$ 400,000,000
Casualty
All Contingencies Reserves [Line Items]
Total reserves	247,000,000	269,000,000
Self-insured retention amount, per occurrence	$ 50,000,000
Number of individual claims expected to exceed self insured retention amount | claim	0
Environmental
All Contingencies Reserves [Line Items]
Total reserves	$ 79,000,000	82,000,000
Environmental impaired sites | site	225
Other
All Contingencies Reserves [Line Items]
Total reserves	$ 48,000,000	$ 49,000,000

Commitments and Contingencies (

Commitments and Contingencies (Details)	1 Months Ended		9 Months Ended
	Mar. 31, 2016mi	May 31, 2007entity	Sep. 23, 2016USD ($)claimmi
Loss Contingencies [Line Items]
Casualty and non catastrophic property deductible			$ 25,000,000
Casualty and catastrophic property deductible			$ 50,000,000
Environmental
Loss Contingencies [Line Items]
Number of miles pertaining to Passaic River tidal reach required to be studied by EPA | mi			17
Pending Litigation
Loss Contingencies [Line Items]
Claims with potential material impact | claim			1
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
Settled Litigation | Environmental
Loss Contingencies [Line Items]
Number of miles subject to remediation | mi	8
Years required for site cleanup	10 years
Minimum | Pending Litigation
Loss Contingencies [Line Items]
Possible loss for certain legal proceedings			$ 6,000,000
Maximum | Pending Litigation
Loss Contingencies [Line Items]
Possible loss for certain legal proceedings			$ 115,000,000

Employee Benefit Plans - Compon

Employee Benefit Plans - Components of Expense/(Income) Related to Net Benefit Expense (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Pension Benefits
Components of expense/ (income) related to net benefit expense:
Service Cost	$ 12	$ 12	$ 36	$ 34
Interest Cost	29	29	89	87
Expected Return on Plan Assets	(39)	(41)	(118)	(122)
Amortization of Net Loss	12	17	36	52
Net Periodic Benefit Cost	14	17	43	51
Special Termination Benefits – Workforce Reduction Program	0	0	0	7
Total Expense	14	17	43	58
Other Post-retirement Benefits
Components of expense/ (income) related to net benefit expense:
Service Cost	0	2	1	3
Interest Cost	3	3	9	10
Amortization of Net Loss	1	1	2	3
Amortization of Prior Service Costs	0	(1)	0	(1)
Total Expense	$ 4	$ 5	$ 12	$ 15

Employee Benefit Plans - Narrat

Employee Benefit Plans - Narrative (Details) $ in Millions	9 Months Ended
	Sep. 23, 2016USD ($)
Compensation and Retirement Disclosure [Abstract]
Discretionary contribution	$ 30

Debt and Credit Agreements - Ac

Debt and Credit Agreements - Activity Related to Long-Term Debt (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015
Movement, Debt Instruments [Roll Forward]
Beginning balance, current portion	$ 20
Beginning balance, long-term portion	10,515
Beginning balance, total	10,535
Long-term Debt Repaid	(19)	$ (228)
Reclassifications	0
Discount, premium and other activity	(3)
Debt issue cost activity	6
Ending balance, current portion	631
Ending balance, long-term portion	9,888
Ending balance, total	10,519
Current Portion
Movement, Debt Instruments [Roll Forward]
Beginning balance, current portion	20
Long-term Debt Repaid	(19)
Reclassifications	631
Discount, premium and other activity	(1)
Debt issue cost activity	0
Ending balance, current portion	631
Long-term Portion
Movement, Debt Instruments [Roll Forward]
Beginning balance, long-term portion	10,515
Long-term Debt Repaid	0
Reclassifications	(631)
Discount, premium and other activity	(2)
Debt issue cost activity	6
Ending balance, long-term portion	9,888
Other Long-Term Assets | Adjustments for New Accounting Pronouncement
Movement, Debt Instruments [Roll Forward]
Beginning balance, total	$ (168)

Debt and Credit Agreements - Na

Debt and Credit Agreements - Narrative (Details) - USD ($)	9 Months Ended
	Sep. 23, 2016	Sep. 28, 2016
Credit Facility
Line of Credit Facility
Borrowing capacity	$ 1,000,000,000
Facility expiration date	May 21, 2020
Amount outstanding	$ 0
Receivables Securitization Facility
Line of Credit Facility
Borrowing capacity	$ 250,000,000
Facility expiration date	Sep. 1, 2019
Amount outstanding	$ 0
Facility expiration period	3 years
Subsequent Event | Receivables Securitization Facility
Line of Credit Facility
Borrowing capacity		$ 200,000,000

Income taxes (Details)

Income taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Sep. 23, 2016	Sep. 25, 2015
Income Tax Disclosure [Abstract]
Unrecognized tax benefits	$ 0	$ 0

Fair Value Measurements - Sched

Fair Value Measurements - Schedule of Fair Value of Investment Assets (Details) - USD ($) $ in Millions	Sep. 23, 2016	Dec. 25, 2015
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Amortized cost basis of investments	$ 223	$ 920
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	226	919
Certificates of Deposit and Commercial Paper | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	150	810
Corporate Bonds | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	62	73
Government Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	14	32
Auction Rate Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	4
Level 1 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 | Certificates of Deposit and Commercial Paper | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 | Corporate Bonds | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 | Government Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 1 | Auction Rate Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 2 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	226	915
Level 2 | Certificates of Deposit and Commercial Paper | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	150	810
Level 2 | Corporate Bonds | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	62	73
Level 2 | Government Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	14	32
Level 2 | Auction Rate Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 3 | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	4
Level 3 | Certificates of Deposit and Commercial Paper | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 3 | Corporate Bonds | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 3 | Government Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	0	0
Level 3 | Auction Rate Securities | Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Investments fair value disclosure	$ 0	$ 4

Fair Value Measurements - Sch41

Fair Value Measurements - Schedule of Investment Maturities (Details) - Fair Value - USD ($) $ in Millions	Sep. 23, 2016	Dec. 25, 2015
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Less than 1 year	$ 152	$ 810
1 - 2 years	7	9
2 - 5 years	2	27
Greater than 5 years	65	73
Total	$ 226	$ 919

Fair Value Measurements - Sch42

Fair Value Measurements - Schedule of Fair Value and Carrying Value of Long-Term Debt (Details) - Level 2 - USD ($) $ in Millions	Sep. 23, 2016	Dec. 25, 2015
Fair Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt (Including Current Maturities)	$ 12,235	$ 11,340
Carrying Value
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt (Including Current Maturities)	$ 10,519	$ 10,535

Other Comprehensive Income (L43

Other Comprehensive Income (Loss) - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Equity [Abstract]
Total comprehensive earnings, net of tax	$ 465	$ 518	$ 1,282	$ 1,523

Other Comprehensive Income (L44

Other Comprehensive Income (Loss) - Changes in AOCI balance by Component (Details) $ in Millions	9 Months Ended
	Sep. 23, 2016USD ($)
Pension and Other Post-Employment Benefits
Other Comprehensive Income (Loss)
Beginning balance	$ (601)
Amounts Reclassified to Net Earnings	38
Tax Expense	(14)
Total Other Comprehensive Income (Loss)	24
Ending balance	(577)
Other
Other Comprehensive Income (Loss)
Beginning balance	(64)
Amounts Reclassified to Net Earnings	4
Tax Expense	(2)
Total Other Comprehensive Income (Loss)	2
Ending balance	(62)
Accumulated Other Comprehensive Income (Loss)
Other Comprehensive Income (Loss)
Beginning balance	(665)
Amounts Reclassified to Net Earnings	42
Tax Expense	(16)
Total Other Comprehensive Income (Loss)	26
Ending balance	$ (639)

Summarized Consolidating Fina45

Summarized Consolidating Financial Data - Consolidating Income Statements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Consolidated Income Statement
Revenue	$ 2,710	$ 2,939	$ 8,032	$ 9,030
Expense	1,869	2,006	5,647	6,237
Operating Income	841	933	2,385	2,793
Equity in Earnings of Subsidiaries	0	0	0	0
Interest (Expense) / Benefit	(139)	(136)	(423)	(404)
Other Income / (Expense) - Net	13	2	28	8
Earnings Before Income Taxes	715	799	1,990	2,397
Income Tax Benefit / (Expense)	(260)	(292)	(734)	(895)
Net Earnings	455	507	1,256	1,502
Total Comprehensive Earnings	465	518	1,282	1,523
CSX Corporation
Consolidated Income Statement
Revenue	0	0	0	0
Expense	(63)	(154)	(202)	(448)
Operating Income	63	154	202	448
Equity in Earnings of Subsidiaries	505	496	1,399	1,482
Interest (Expense) / Benefit	(141)	(134)	(425)	(399)
Other Income / (Expense) - Net	0	(1)	1	(4)
Earnings Before Income Taxes	427	515	1,177	1,527
Income Tax Benefit / (Expense)	28	(8)	79	(25)
Net Earnings	455	507	1,256	1,502
Total Comprehensive Earnings	465	518	1,282	1,523
CSX Transportation
Consolidated Income Statement
Revenue	2,691	2,920	7,974	8,972
Expense	1,960	2,182	5,985	6,765
Operating Income	731	738	1,989	2,207
Equity in Earnings of Subsidiaries	1	0	1	0
Interest (Expense) / Benefit	(7)	(8)	(27)	(24)
Other Income / (Expense) - Net	9	5	24	18
Earnings Before Income Taxes	734	735	1,987	2,201
Income Tax Benefit / (Expense)	(268)	(273)	(735)	(824)
Net Earnings	466	462	1,252	1,377
Total Comprehensive Earnings	467	462	1,253	1,374
Eliminations and Other
Consolidated Income Statement
Revenue	19	19	58	58
Expense	(28)	(22)	(136)	(80)
Operating Income	47	41	194	138
Equity in Earnings of Subsidiaries	(506)	(496)	(1,400)	(1,482)
Interest (Expense) / Benefit	9	6	29	19
Other Income / (Expense) - Net	4	(2)	3	(6)
Earnings Before Income Taxes	(446)	(451)	(1,174)	(1,331)
Income Tax Benefit / (Expense)	(20)	(11)	(78)	(46)
Net Earnings	(466)	(462)	(1,252)	(1,377)
Total Comprehensive Earnings	$ (467)	$ (462)	$ (1,253)	$ (1,374)

Summarized Consolidating Fina46

Summarized Consolidating Financial Data - Consolidating Balance Sheet (Details) - USD ($) $ / shares in Units, $ in Millions	Sep. 23, 2016	Dec. 25, 2015	Sep. 25, 2015	Dec. 26, 2014
Current Assets:
Cash and Cash Equivalents	$ 603	$ 628	$ 541	$ 669
Short-term Investments	152	810
Accounts Receivable - Net	925	982
Receivable from Affiliates	0	0
Materials and Supplies	397	350
Other Current Assets	86	70
Total Current Assets	2,163	2,840
Properties	42,720	41,574
Accumulated Depreciation	(11,938)	(11,400)
Properties - Net	30,782	30,174
Other Long-term Assets	303	337
Total Assets	34,681	34,745
Current Liabilities:
Accounts Payable	859	764
Labor and Fringe Benefits Payable	450	490
Payable to Affiliates	0	0
Casualty, Environmental and Other Reserves	124	131
Current Maturities of Long-term Debt	631	20
Income and Other Taxes Payable	90	108
Other Current Liabilities	109	439
Total Current Liabilities	2,263	1,952
Casualty, Environmental and Other Reserves	250	269
Long-term Debt	9,888	10,515
Deferred Income Taxes - Net	9,505	9,179
Other Long-term Liabilities	1,105	1,162
Total Liabilities	23,011	23,077
Shareholders' Equity
Common Stock, $1 Par Value	937	966
Other Capital	125	113
Retained Earnings	11,233	11,238
Accumulated Other Comprehensive Loss	(639)	(665)
Noncontrolling Interest	14	16
Total Shareholders' Equity	11,670	11,668
Total Liabilities and Shareholders' Equity	$ 34,681	$ 34,745
Common stock, par value (in dollars per share)	$ 1	$ 1
Investments in Conrail
Current Assets:
Investment in Affiliates and Other Companies	$ 830	$ 803
Affiliates and Other Companies
Current Assets:
Investment in Affiliates and Other Companies	603	591
Investments in Consolidated Subsidiaries
Current Assets:
Investment in Affiliates and Other Companies	0	0
CSX Corporation
Current Assets:
Cash and Cash Equivalents	448	444	311	510
Short-term Investments	150	810
Accounts Receivable - Net	(3)	1
Receivable from Affiliates	1,158	1,092
Materials and Supplies	0	0
Other Current Assets	11	(59)
Total Current Assets	1,764	2,288
Properties	1	1
Accumulated Depreciation	(1)	(1)
Properties - Net	0	0
Other Long-term Assets	3	8
Total Assets	25,406	25,012
Current Liabilities:
Accounts Payable	150	108
Labor and Fringe Benefits Payable	36	36
Payable to Affiliates	3,601	2,954
Casualty, Environmental and Other Reserves	0	0
Current Maturities of Long-term Debt	613	1
Income and Other Taxes Payable	(334)	(87)
Other Current Liabilities	0	0
Total Current Liabilities	4,066	3,012
Casualty, Environmental and Other Reserves	0	0
Long-term Debt	9,127	9,732
Deferred Income Taxes - Net	(206)	(188)
Other Long-term Liabilities	763	804
Total Liabilities	13,750	13,360
Shareholders' Equity
Common Stock, $1 Par Value	937	966
Other Capital	125	113
Retained Earnings	11,233	11,238
Accumulated Other Comprehensive Loss	(639)	(665)
Noncontrolling Interest	0	0
Total Shareholders' Equity	11,656	11,652
Total Liabilities and Shareholders' Equity	25,406	25,012
CSX Corporation | Investments in Conrail
Current Assets:
Investment in Affiliates and Other Companies	0	0
CSX Corporation | Affiliates and Other Companies
Current Assets:
Investment in Affiliates and Other Companies	(39)	(39)
CSX Corporation | Investments in Consolidated Subsidiaries
Current Assets:
Investment in Affiliates and Other Companies	23,678	22,755
CSX Transportation
Current Assets:
Cash and Cash Equivalents	130	175	168	100
Short-term Investments	0	0
Accounts Receivable - Net	197	198
Receivable from Affiliates	2,504	2,038
Materials and Supplies	397	350
Other Current Assets	56	120
Total Current Assets	3,284	2,881
Properties	40,052	38,964
Accumulated Depreciation	(10,508)	(10,016)
Properties - Net	29,544	28,948
Other Long-term Assets	403	399
Total Assets	33,859	32,886
Current Liabilities:
Accounts Payable	679	626
Labor and Fringe Benefits Payable	371	407
Payable to Affiliates	445	437
Casualty, Environmental and Other Reserves	109	115
Current Maturities of Long-term Debt	19	19
Income and Other Taxes Payable	394	183
Other Current Liabilities	107	437
Total Current Liabilities	2,124	2,224
Casualty, Environmental and Other Reserves	202	219
Long-term Debt	761	783
Deferred Income Taxes - Net	9,470	9,141
Other Long-term Liabilities	468	484
Total Liabilities	13,025	12,851
Shareholders' Equity
Common Stock, $1 Par Value	181	181
Other Capital	5,094	5,091
Retained Earnings	15,575	14,774
Accumulated Other Comprehensive Loss	(30)	(31)
Noncontrolling Interest	14	20
Total Shareholders' Equity	20,834	20,035
Total Liabilities and Shareholders' Equity	33,859	32,886
CSX Transportation | Investments in Conrail
Current Assets:
Investment in Affiliates and Other Companies	0	0
CSX Transportation | Affiliates and Other Companies
Current Assets:
Investment in Affiliates and Other Companies	628	658
CSX Transportation | Investments in Consolidated Subsidiaries
Current Assets:
Investment in Affiliates and Other Companies	0	0
Eliminations and Other
Current Assets:
Cash and Cash Equivalents	25	9	$ 62	$ 59
Short-term Investments	2	0
Accounts Receivable - Net	731	783
Receivable from Affiliates	(3,662)	(3,130)
Materials and Supplies	0	0
Other Current Assets	19	9
Total Current Assets	(2,885)	(2,329)
Properties	2,667	2,609
Accumulated Depreciation	(1,429)	(1,383)
Properties - Net	1,238	1,226
Other Long-term Assets	(103)	(70)
Total Assets	(24,584)	(23,153)
Current Liabilities:
Accounts Payable	30	30
Labor and Fringe Benefits Payable	43	47
Payable to Affiliates	(4,046)	(3,391)
Casualty, Environmental and Other Reserves	15	16
Current Maturities of Long-term Debt	(1)	0
Income and Other Taxes Payable	30	12
Other Current Liabilities	2	2
Total Current Liabilities	(3,927)	(3,284)
Casualty, Environmental and Other Reserves	48	50
Long-term Debt	0	0
Deferred Income Taxes - Net	241	226
Other Long-term Liabilities	(126)	(126)
Total Liabilities	(3,764)	(3,134)
Shareholders' Equity
Common Stock, $1 Par Value	(181)	(181)
Other Capital	(5,094)	(5,091)
Retained Earnings	(15,575)	(14,774)
Accumulated Other Comprehensive Loss	30	31
Noncontrolling Interest	0	(4)
Total Shareholders' Equity	(20,820)	(20,019)
Total Liabilities and Shareholders' Equity	(24,584)	(23,153)
Eliminations and Other | Investments in Conrail
Current Assets:
Investment in Affiliates and Other Companies	830	803
Eliminations and Other | Affiliates and Other Companies
Current Assets:
Investment in Affiliates and Other Companies	14	(28)
Eliminations and Other | Investments in Consolidated Subsidiaries
Current Assets:
Investment in Affiliates and Other Companies	$ (23,678)	$ (22,755)

Summarized Consolidating Fina47

Summarized Consolidating Financial Data - Consolidating Cash Flow Statements (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 23, 2016	Sep. 25, 2015	Sep. 23, 2016	Sep. 25, 2015
Operating Activities
Net Cash Provided by (Used in) Operating Activities			$ 2,488	$ 2,512
Investing Activities
Property Additions			(1,590)	(1,909)
Purchase of Short-term Investments			(410)	(1,170)
Proceeds from Sales of Short-term Investments			1,070	1,040
Proceeds from Property Dispositions			11	46
Other Investing Activities			26	42
Net Cash Used in Investing Activities			(893)	(1,951)
Financing Activities
Long-term Debt Issued			0	600
Long-term Debt Repaid			(19)	(228)
Dividends Paid			(513)	(512)
Stock Options Exercised			0	0
Shares Repurchased	$ (263)	$ (262)	(778)	(546)
Other Financing Activities			(310)	(3)
Net Cash Used in Financing Activities			(1,620)	(689)
Net Decrease in Cash and Cash Equivalents			(25)	(128)
Cash and Cash Equivalents at Beginning of Period			628	669
Cash and Cash Equivalents at End of Period	603	541	603	541
CSX Corporation
Operating Activities
Net Cash Provided by (Used in) Operating Activities			644	637
Investing Activities
Property Additions			0	0
Purchase of Short-term Investments			(410)	(1,170)
Proceeds from Sales of Short-term Investments			1,070	995
Proceeds from Property Dispositions			0	0
Other Investing Activities			(3)	(11)
Net Cash Used in Investing Activities			657	(186)
Financing Activities
Long-term Debt Issued			0	600
Long-term Debt Repaid			0	(200)
Dividends Paid			(513)	(512)
Stock Options Exercised			0	0
Shares Repurchased			(778)	(546)
Other Financing Activities			(6)	8
Net Cash Used in Financing Activities			(1,297)	(650)
Net Decrease in Cash and Cash Equivalents			4	(199)
Cash and Cash Equivalents at Beginning of Period			444	510
Cash and Cash Equivalents at End of Period	448	311	448	311
CSX Transportation
Operating Activities
Net Cash Provided by (Used in) Operating Activities			2,089	2,313
Investing Activities
Property Additions			(1,469)	(1,794)
Purchase of Short-term Investments			0	0
Proceeds from Sales of Short-term Investments			0	0
Proceeds from Property Dispositions			11	46
Other Investing Activities			96	93
Net Cash Used in Investing Activities			(1,362)	(1,655)
Financing Activities
Long-term Debt Issued			0	0
Long-term Debt Repaid			(18)	(28)
Dividends Paid			(450)	(563)
Stock Options Exercised			0	0
Shares Repurchased			0	0
Other Financing Activities			(304)	1
Net Cash Used in Financing Activities			(772)	(590)
Net Decrease in Cash and Cash Equivalents			(45)	68
Cash and Cash Equivalents at Beginning of Period			175	100
Cash and Cash Equivalents at End of Period	130	168	130	168
Eliminations and Other
Operating Activities
Net Cash Provided by (Used in) Operating Activities			(245)	(438)
Investing Activities
Property Additions			(121)	(115)
Purchase of Short-term Investments			0	0
Proceeds from Sales of Short-term Investments			0	45
Proceeds from Property Dispositions			0	0
Other Investing Activities			(67)	(40)
Net Cash Used in Investing Activities			(188)	(110)
Financing Activities
Long-term Debt Issued			0	0
Long-term Debt Repaid			(1)	0
Dividends Paid			450	563
Stock Options Exercised			0	0
Shares Repurchased			0	0
Other Financing Activities			0	(12)
Net Cash Used in Financing Activities			449	551
Net Decrease in Cash and Cash Equivalents			16	3
Cash and Cash Equivalents at Beginning of Period			9	59
Cash and Cash Equivalents at End of Period	$ 25	$ 62	$ 25	$ 62