Receivables securitization facility, period Receivables Securitization Facility Duration Duration of the receivables securitization facility, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Statistical Measurement [Domain] Statistical Measurement [Domain] Schedule of Other Income Schedule of Other Nonoperating Income, by Component [Table Text Block] Freight revenues Total freight revenues Cargo and Freight [Member] Expected return on plan assets Defined Benefit Plan, Expected Return (Loss) on Plan Assets Schedule of Changes in Performance Stock Unit Awards Schedule of Nonvested Performance-Based Units Activity [Table Text Block] Award Timing Predetermined Award Timing Predetermined [Flag] Entity File Number Entity File Number Paid-in-surplus Additional Paid-in Capital [Member] Other Income Other Income and Other Expense Disclosure [Text Block] Tabular List, Table Tabular List [Table Text Block] Stock issued (in shares) Business Combination, Consideration Transferred, Equity Interest, Share Issued, Number of Shares Unearned (in shares) Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Unearned The number of equity-based payment instruments, excluding stock (or unit) options, that were unearned during the reporting period. Cash contributions for pension plans Payment for Pension Benefits Schedule of Personal Injury Liability Activity Schedule of Loss Contingencies by Contingency [Table Text Block] Stock-based compensation, before tax: Share-Based Payment Arrangement, Noncash Expense [Abstract] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Earnings per share - basic (in dollars per share) Earnings Per Share, Basic Adjustment to Compensation: Adjustment to Compensation [Axis] Related Parties Related Party Transactions Disclosure [Text Block] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Accounts payable and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Income tax benefit realized from option exercises Share-Based Payment Arrangement, Exercise of Option, Tax Benefit Schedule of Segment Reporting Information, by Segment Schedule of Segment Reporting Information, by Segment [Table Text Block] Aggregate intrinsic value Aggregate Intrinsic Value [Abstract] Aggregate Intrinsic Value Adjustment to Compensation, Amount Adjustment to Compensation Amount Stock options Share-Based Payment Arrangement, Option [Member] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Property, Plant and Equipment [Table] Property, Plant and Equipment [Table] Accounts and Financing Receivables [Table] Accounts and Financing Receivables [Table] Loss Contingency Accrual [Roll Forward] Loss Contingency Accrual [Roll Forward] Total common shareholders' equity Beginning balance Ending balance Equity, Attributable to Parent Other comprehensive income/(loss) before reclassifications OCI, before Reclassifications, Net of Tax, Attributable to Parent Other comprehensive income/(loss): Other Comprehensive Income (Loss), Net of Tax [Abstract] Insider Trading Policies and Procedures [Line Items] Total stock-based compensation, before tax Share-Based Payment Arrangement, Expense Schedule of Property and Equipment and Weighted Average Estimated Useful Life Property, Plant and Equipment [Table Text Block] Common shares authorized (in shares) Common Stock, Shares Authorized Current assets: Assets, Current [Abstract] Excess income tax benefits from equity compensation plans Excess income tax benefits from equity compensation plans Excess income tax benefits from equity compensation plans Total liabilities and common shareholders' equity Liabilities and Equity Defined benefit plans Accumulated Defined Benefit Plans Adjustment Attributable to Parent [Member] Options Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward] Liabilities and common shareholders' equity Liabilities and Equity [Abstract] State and Local Jurisdiction State and Local Jurisdiction [Member] Cover [Abstract] Cover [Abstract] Amounts reclassified from accumulated other comprehensive income/(loss) Reclassification from AOCI, Current Period, Net of Tax, Attributable to Parent Maximum Maximum [Member] Options exercisable (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Exercise Price Remaining number of shares that may be repurchased under current authority (in shares) Share Repurchase Program, Remaining Authorized, Number of Shares Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Debt Instrument [Line Items] Debt Instrument [Line Items] Net periodic pension benefit/(costs) Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Share-Based Compensation Arrangements by Share-Based Payment Award [Table] Schedule of Changes in Retention Awards Share-Based Payment Arrangement, Restricted Stock and Restricted Stock Unit, Activity [Table Text Block] Treasury shares Treasury Stock, Common [Member] Fuel Locomotive fuel Fuel Costs Adjustment to Non-PEO NEO Compensation Footnote Adjustment to Non-PEO NEO Compensation Footnote [Text Block] Pay vs Performance Disclosure [Line Items] Share Repurchase Program [Line Items] Share Repurchase Program [Line Items] Retirement Benefits [Abstract] Foreign currency translation Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax, Portion Attributable to Parent Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Pending Acquisition Business Combination [Text Block] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Entity Shell Company Entity Shell Company Interest from IRS refund claims Interest From Federal Refund Claims Interest From Federal Refund Claims Other long-term liabilities Other Liabilities, Noncurrent Schedule of Long-Term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Purchased services and materials Purchased Services And Materials Materials and contracted services to maintain infrastructure and equipment and terminal services at intermodal and automotive facilities. Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Unsecured Notes Due February 20, 2035 Unsecured Notes Due February 20, 2035 [Member] Unsecured Notes Due February 20, 2035 Statement of Cash Flows [Abstract] Statement of Cash Flows [Abstract] Company Selected Measure Amount Company Selected Measure Amount Award Timing MNPI Considered Award Timing MNPI Considered [Flag] Line of Credit Facility [Table] Line of Credit Facility [Table] Comprehensive income Comprehensive Income (Loss), Net of Tax, Attributable to Parent Share Repurchase Programs Treasury Stock [Text Block] Name Measure Name Secured Debt Secured Debt [Member] Current operating lease liabilities Operating Lease, Liability, Current Changes in estimates for prior years Changes in estimates for prior years Amount of expense (reversal of expense) which increases (decreases) the accrual for loss contingencies from revisions in estimates to existing obligations. Deferred income taxes Deferred Income Tax Liabilities, Net Document Fiscal Period Focus Document Fiscal Period Focus Unsecured Debt Unsecured Debt [Member] Income and other taxes Increase (Decrease) in Accrued Taxes Payable Award Timing Method Award Timing Method [Text Block] Award Type [Axis] Award Type [Axis] Foreign currency translation Accumulated Foreign Currency Adjustment Attributable to Parent [Member] Legal Entity [Axis] Legal Entity [Axis] Total assets Assets Investment, Name [Domain] Investment, Name [Domain] Trading Symbol Trading Symbol Vested (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period, Weighted Average Grant Date Fair Value Geographical [Domain] Geographical [Domain] Operating Loss Carryforwards [Table] Operating Loss Carryforwards [Table] Business Combination, Separately Recognized Transaction [Domain] Business Combination, Separately Recognized Transaction [Domain] Conversion, stock option exercises, forfeitures, ESPP, and other (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Entity Address, City or Town Entity Address, City or Town Rail and other track material Roadrail and Other Track Material [Member] Information on rail and other track material. Operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract] Other segment items Segment Reporting, Other Segment Item, Amount Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Statement of Income Location, Balance [Domain] Statement of Income Location, Balance [Domain] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Entity Emerging Growth Company Entity Emerging Growth Company Dividends per share (in dollars per share) Common Stock, Dividends, Per Share, Declared Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Accrual for Environmental Loss Contingencies [Roll Forward] Accrual for Environmental Loss Contingencies [Roll Forward] Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Number Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year Change in Fair Value as of Vesting Date of Prior Year Equity Awards Vested in Covered Year [Member] Fair Value, Inputs, Level 2 Fair Value, Inputs, Level 2 [Member] Equity method investments Equity Method Investments Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Business Combination [Domain] Business Combination [Domain] Basis of Presentation Basis of Accounting [Text Block] Common shares outstanding (in shares) Beginning balance (in shares) Ending balance (in shares) Common Stock, Shares, Outstanding PEO PEO [Member] Accounts Receivable Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Materials and supplies Increase (Decrease) in Materials and Supplies Changes in current assets and liabilities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity, Increase (Decrease) in Operating Capital [Abstract] Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year Dividends or Other Earnings Paid on Equity Awards not Otherwise Reflected in Total Compensation for Covered Year [Member] Volatility Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Volatility Rate Retained earnings Retained Earnings [Member] Income Tax Jurisdiction [Axis] Income Tax Jurisdiction [Axis] Shares Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Share-Based Payment Arrangement [Abstract] Cash, cash equivalents, and restricted cash at beginning of year Cash, cash equivalents, and restricted cash at end of period Total cash, cash equivalents, and restricted cash equivalents per above Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation Income Statement [Abstract] Income Statement [Abstract] Income tax expense (Note 7) Income tax expense Income Tax Expense (Benefit) UPRR UPRR [Member] Information on the related parties. Cash paid during the period for: Cash Paid [Abstract] Cash Paid Income and other taxes payable Taxes Payable, Current Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Product and Service [Domain] Product and Service [Domain] Entity shares issued (in shares) Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Business Combination, Consideration Transferred, Equity Interests Issued And Issuable, Entity Shares Issued Per Acquiree Share Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Business Combination [Table] Business Combination [Table] Organization, Consolidation and Presentation of Financial Statements [Abstract] Other current assets Increase (Decrease) in Other Current Assets Other Income and Expenses [Abstract] Accounts receivable, from securitization, default or dilution ratio Sensitivity Analysis Of Fair Value Transferors Interests In Transferred Financial Assets Percent Of Change In Default Or Dilution Ratios With No Impact Information on the impact of changes in the default or dilution ratios on the Accounts Receivable, from Securitization, Facility. Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Cash received from option exercises Proceeds from Stock Options Exercised Accumulated depreciation Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization City Area Code City Area Code Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] All Trading Arrangements All Trading Arrangements [Member] Equity Awards Adjustments, Footnote Equity Awards Adjustments, Footnote [Text Block] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Vested or expected to vest (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Remaining Contractual Term Outstanding at beginning of period (in shares) Outstanding at end of period (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Number Commitments and Contingencies Disclosure [Abstract] Investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation [Abstract] Performance stock unit awards Performance Stock Unit Awards [Member] Represents information regarding performance retention awards. Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Cash provided by operating activities Cash Provided by (Used in) Operating Activity, Including Discontinued Operation Technology and other Technology Equipment [Member] Related Party Transactions [Abstract] Estimated useful life Property, Plant and Equipment, Useful Life Amortization of actuarial loss Defined Benefit Plan, Amortization of Gain (Loss) Schedule of Annual Weighted Average Assumptions Schedule of Share-Based Payment Award, Stock Options, Valuation Assumptions [Table Text Block] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Loss contingency, estimate of possible loss Loss Contingency, Estimate of Possible Loss PEO Total Compensation Amount PEO Total Compensation Amount Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Depreciation Depreciation Depreciation Vested or expected to vest (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Weighted Average Exercise Price Equity Components [Axis] Equity Components [Axis] Property, Plant and Equipment [Line Items] Property, Plant and Equipment [Line Items] Kansas Department of Revenue Kansas Department Of Revenue [Member] Kansas Department Of Revenue Operations and Segmentation Nature of Operations [Text Block] Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Total equipment Equipment [Member] Number of reportable segments Number of Reportable Segments Supplemental cash flow information Supplemental Cash Flow Information [Abstract] Other Performance Measure, Amount Other Performance Measure, Amount Weighted-average exercise price Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract] Entity Address, State or Province Entity Address, State or Province Dividends declared Dividends, Common Stock Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Total current liabilities Liabilities, Current Individual: Individual [Axis] Cost Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Vesting [Axis] Vesting [Axis] Income Tax Jurisdiction [Domain] Income Tax Jurisdiction [Domain] Other current assets Other Assets, Current Entity [Domain] Entity [Domain] Cash used in investing activities Cash Provided by (Used in) Investing Activity, Including Discontinued Operation Investments Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table Aggregate Change in Present Value of Accumulated Benefit for All Pension Plans Reported in Summary Compensation Table [Member] Interest, net of amounts capitalized Interest Paid, Excluding Capitalized Interest, Operating Activity Document Fiscal Year Focus Document Fiscal Year Focus Operating lease assets Operating Lease, Right-of-Use Asset Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] Compensation-related accruals Accrued Employee Benefits, Current Entity Interactive Data Current Entity Interactive Data Current Acquisition-related (Note 18) Business Combination, Acquisition-Related Cost, Expense Recognized weighted-average period (in years) Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Treasury shares repurchased for employee payroll taxes Treasury Shares Repurchased For Employee Payroll Taxes Represents the amount of treasury shares repurchased for employee payroll taxes. Exercised (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period Equity [Abstract] Options exercisable Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Intrinsic Value Operations and Segmentation Segment Reporting Disclosure [Text Block] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Debt due within one year (Note 14) Long-Term Debt and Lease Obligation, Current Long-Lived Tangible Asset [Axis] Long-Lived Tangible Asset [Axis] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Schedule of Net Periodic Pension Benefit/Cost Schedule of Net Benefit Costs [Table Text Block] Total road Road [Member] Information on total roads. Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Accumulated Other Comprehensive Income/Loss Comprehensive Income (Loss) Note [Text Block] Stock repurchase program, number of shares authorized to be repurchased (in shares) Share Repurchase Program, Authorized, Number of Shares Fair Value, Recurring and Nonrecurring [Table] Fair Value, Recurring and Nonrecurring [Table] Commercial paper outstanding Commercial Paper Restricted cash equivalents in other current assets Restricted Cash and Cash Equivalent, Current Schedule of Reclassifications Out of Accumulated Other Comprehensive Income/Loss Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Other assets Other Assets, Noncurrent Interest payable Interest Payable, Current Entity Central Index Key Entity Central Index Key PEO Name PEO Name Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year Prior Year End Fair Value of Equity Awards Granted in Any Prior Year that Fail to Meet Applicable Vesting Conditions During Covered Year [Member] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Accruals Accrual for Environmental Loss Contingencies, Charges to Expense for New Losses Revolving Credit Facility Revolving Credit Facility [Member] Arrangement Duration Trading Arrangement Duration Authorized debt issuance Board Of Directors Authorized Debt Issuance Amount of debt issuance authorized by Board of Directors. Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Share-Based Payment Arrangement, Tranche One Share-Based Payment Arrangement, Tranche One [Member] Total acquisition-related expense Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Expensed Financial Instruments Financial Instruments Disclosure [Text Block] Segments [Axis] Segments [Axis] Exercise Price Award Exercise Price Entity Filer Category Entity Filer Category Local Phone Number Local Phone Number Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Other investing activities, net Payment for (Proceeds from) Other Investing Activity Employer contribution match (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Discount from Market Price, Purchase Date Stock-Based Compensation Share-Based Payment Arrangement [Text Block] Current year accruals Loss Contingency Accrual, Provision Assets Assets [Abstract] Credit Facility [Axis] Credit Facility [Axis] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Ballast Road Ballast [Member] Information on ballast. Vesting [Domain] Vesting [Domain] Debt Instrument [Axis] Debt Instrument [Axis] Forfeited (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value Retirement Plans Retirement Benefits [Text Block] Business Combination [Line Items] Business Combination [Line Items] Credit Facility [Domain] Credit Facility [Domain] Common shareholders' equity: Equity, Attributable to Parent [Abstract] Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year Vesting Date Fair Value of Equity Awards Granted and Vested in Covered Year [Member] Number of states in which entity operates Number of States in which Entity Operates Award vesting rights (percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Rights, Percentage Entity Address, Address Line One Entity Address, Address Line One Share repurchase programs (Note 16) Treasury stock, value, acquired Treasury Stock, Value, Acquired, Cost Method AOCI Total AOCI Attributable to Parent [Member] Investment, Name [Axis] Investment, Name [Axis] Fixed rate debt securities, interest rate Debt Instrument, Interest Rate, Stated Percentage Accounts receivable, allowance for credit loss, current Accounts Receivable, Allowance for Credit Loss, Current Operating lease liabilities Operating Lease, Liability, Noncurrent Business Combination, Asset Acquisition, Transaction between Entities under Common Control, and Joint Venture Formation [Abstract] Termination fee Business Combination, Specified Termination Fee Business Combination, Specified Termination Fee Commitments and Contingencies Commitments Contingencies and Guarantees [Text Block] Fair Value as of Grant Date Award Grant Date Fair Value Property, Plant and Equipment [Abstract] Entity Registrant Name Entity Registrant Name Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Earnings Per Share, Diluted, by Common Class, Including Two-Class Method [Table] Net periodic pension (benefit)/cost Defined Benefit Plan, Net Periodic Benefit Cost (Credit) Other current assets Business Combination, Separately Recognized Transaction, Acquisition-Related Cost, Debt and Equity Securities Issuance Cost, Not Expensed Operating Operating Expense Operating Expense Schedule of Long-Term Debt Instruments Schedule of Long-Term Debt Instruments [Table Text Block] Compensation and benefits Labor and Related Expense TTX Company TTX Company [Member] Represents information on TTX Company. Weighted-average number of shares outstanding, dilutive effect on shares Incremental Common Shares Attributable to Dilutive Effect of Share-Based Payment Arrangements Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period Other Other Nonoperating Income Expense, Other The amount of income (expense) from other nonoperating activities not otherwise specified. Total operating expenses Costs and Expenses Forfeited (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Forfeited in Period Unrecognized compensation expense Share-Based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount Related Party Transaction [Line Items] Related Party Transaction [Line Items] Document Quarterly Report Document Quarterly Report Deferred and other income taxes Deferred Income Taxes and Tax Credits Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Repayments of commercial paper Repayments of Commercial Paper Number of operating segments Number of Operating Segments Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Outstanding (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Remaining Contractual Term Accounting Standards Update and Change in Accounting Principle [Abstract] Schedule of Accounts Payable and Other Current Liabilities Schedule of Accounts Payable and Accrued Liabilities [Table Text Block] Other roadway Road, Other [Member] Information on other railroad assets. Related and Nonrelated Parties [Axis] Related and Nonrelated Parties [Axis] Interest cost Defined Benefit Plan, Interest Cost Granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value Title Trading Arrangement, Individual Title Peer Group Total Shareholder Return Amount Peer Group Total Shareholder Return Amount Expected return on plan assets, changes in fair value, period (in years) Defined Benefit Plan Expected Return On Plan Assets Changes In Fair Value Period The expected long-term rate of return on plan assets that is applied to a calculated value of plan assets that recognizes the changes in fair value over this period. Restatement Determination Date: Restatement Determination Date [Axis] Cash consideration Payments to Acquire Businesses, Gross Outstanding value of receivables securitization facility Value Outstanding Undivided Interest Held By Investors Under Receivables Securitization Facility Value of the outstanding undivided interest held by investors under the receivables securitization facility. Conversion, stock option exercises, forfeitures, ESPP, and other Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture Non-PEO NEO Non-PEO NEO [Member] Outstanding Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Intrinsic Value Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Other financing activities, net Proceeds from (Payment for) Other Financing Activity Interest income Interest Income, Other Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Repayments amount Receivables Securitization Facility Repayments Represents repayments made under the Receivables Securitization Facility. Land Land [Member] Name Trading Arrangement, Individual Name Materials and supplies Materials, Supplies, and Other Award Type [Domain] Award Type [Domain] Equity Awards Adjustments Equity Awards Adjustments [Member] Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Locomotives Equipment, Locomotives [Member] Information on locomotives. Disaggregation of Revenue [Line Items] Disaggregation of Revenue [Line Items] Compensation Amount Outstanding Recovery Compensation Amount Fixed rate debt securities, principal amount Debt Instrument, Face Amount Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Dividend yield Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Dividend Rate Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Sites subject of actions taken by US government Sites Subject Of Actions Taken By US Government Sites subject of actions taken by the U.S. government. Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Chassis assets Chassis Assets [Member] Represents chassis assets. Share Repurchase Program [Axis] Share Repurchase Program [Axis] MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] Name Awards Close in Time to MNPI Disclosures, Individual Name Outstanding at beginning of period (in dollars per share) Outstanding at end of period (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] Performance period (in years) Share Based Compensation Arrangement by Share Based Payment Award, Performance Period Represents the performance period of share-based payment awards. Other subsidiary revenues Other Subsidiary Revenues [Member] Represents information regarding other subsidiary revenues. Industrial Industrial [Member] Represents information regarding Industrial revenues. ESPP Employee Stock [Member] Operating revenues: Revenues [Abstract] Treasury stock Treasury Stock, Value Accumulated other comprehensive loss (Note 9) Accumulated Other Comprehensive Income (Loss), Net of Tax Debt due after one year (Note 14) Long-Term Debt and Lease Obligation Financial Instruments [Domain] Financial Instruments [Domain] Vested or expected to vest Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Aggregate Intrinsic Value Segments [Domain] Segments [Domain] Statement of Income Location, Balance [Axis] Statement of Income Location, Balance [Axis] Line of credit facility, remaining borrowing capacity Line of Credit Facility, Remaining Borrowing Capacity Aggregate Pension Adjustments Service Cost Aggregate Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Outstanding debt as defined by facility Outstanding Debt As Defined By Facility Outstanding debt as defined by the credit facility. Current portion, ending balance at September 30, Accrued Environmental Loss Contingencies, Current Minimum Minimum [Member] Income Tax Authority, Name [Domain] Income Tax Authority, Name [Domain] Purchased services and materials Purchased Services And Materials [Member] Purchased Services And Materials Accounts, Notes, Loans and Financing Receivable [Line Items] Accounts, Notes, Loans and Financing Receivable [Line Items] Company Selected Measure Name Company Selected Measure Name Beginning balance Ending balance Accrual for Environmental Loss Contingencies Sites on superfund national priorities list Sites On Super fund National Priorities List Sites on the Superfund National Priorities List. Debt Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts payable, current Accounts Payable, Current Non-operating property environmental remediation and restoration Environmental Remediation And Restoration Environmental Remediation And Restoration Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] All Executive Categories All Executive Categories [Member] Common shares, $2.50 par value, 1,400,000,000 authorized; 1,113,163,706 and 1,113,018,733 issued; 593,127,096 and 604,241,260 outstanding, respectively Common Stock, Value, Issued Share-Based Payment Arrangement, Tranche Two Share-Based Payment Arrangement, Tranche Two [Member] Weighted average number of shares - diluted (in shares) Weighted average number of shares - diluted (in shares) Weighted Average Number of Shares Outstanding, Diluted Commitments and contingencies (Note 15) Commitments and Contingencies Real estate income Profit (Loss) from Real Estate Operations Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Business Combination [Axis] Business Combination [Axis] Entity Small Business Entity Small Business Other Other Acquisition-Related Costs [Member] Other Acquisition-Related Costs Income Tax Disclosure [Abstract] Other Other Cost and Expense, Operating Receivables facility Total Transfer Capacity Undivided Interests To Investors Under Receivables Securitization Facility Total capacity to transfer undivided interest to investors under receivables securitization facility. Document Transition Report Document Transition Report Equity method investment, ownership percentage Equity Method Investment, Ownership Percentage Accounting Pronouncements Accounting Standards Update and Change in Accounting Principle [Text Block] Underlying Securities Award Underlying Securities Amount Equity Component [Domain] Equity Component [Domain] Document Period End Date Document Period End Date PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Forfeited or expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period Income Taxes Income Tax Disclosure [Text Block] Credit facility withdrawals Proceeds from Lines of Credit Arkansas Department of Revenue Arkansas Department Of Revenue [Member] Represents Arkansas Department of Revenue. Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] Fair value total debt Debt Instrument, Fair Value Disclosure Scenario [Axis] Scenario [Axis] Options exercisable (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Weighted Average Remaining Contractual Term Average price paid (in dollars per share) Shares Acquired, Average Cost Per Share Document Type Document Type Earnings Per Share Earnings Per Share [Text Block] Name Outstanding Recovery, Individual Name Loss Contingencies [Table] Loss Contingencies [Table] Paid-in-surplus Additional Paid in Capital Product and Service [Axis] Product and Service [Axis] Total operating revenues Revenue from Contract with Customer, Excluding Assessed Tax Share-based payment award, award requisite service period (in months) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Requisite Service Period All Individuals All Individuals [Member] Long-Term Debt, Type [Domain] Long-Term Debt, Type [Domain] Fair Value Disclosures [Abstract] Capital investments Payments to Acquire Property, Plant, and Equipment Vested or expected to vest (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Vested and Expected to Vest, Outstanding, Number Name Forgone Recovery, Individual Name Award expiration period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Expiration Period Total current assets Assets, Current Statistical Measurement [Axis] Statistical Measurement [Axis] Cross default provision Cross Default Provision As Defined By Facility Cross-default provision, as defined by facility. Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested Year-over-Year Change in Fair Value of Equity Awards Granted in Prior Years That are Outstanding and Unvested [Member] Beginning balance Ending balance at September 30, Loss Contingency Accrual Forfeited or expired (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Forfeitures and Expirations in Period, Weighted Average Exercise Price Reconciliation of cash, cash equivalents, and restricted cash to the Condensed Consolidated Statement of Financial Position: Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation [Abstract] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Equity Method Investee Equity Method Investee [Member] Intrinsic value of stock options exercised Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercises in Period, Intrinsic Value Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Earnings Per Share, Diluted, by Common Class, Including Two Class Method [Line Items] Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Share Repurchase Program [Domain] Share Repurchase Program [Domain] Current liabilities: Liabilities, Current [Abstract] Total other comprehensive income/(loss) Other comprehensive income/(loss) Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Line of Credit Facility [Line Items] Line of Credit Facility [Line Items] Weighted-average remaining contractual term (in yrs.) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Additional Disclosures [Abstract] Geographical [Axis] Geographical [Axis] Other operating activities, net Increase (Decrease) in Other Operating Assets and Liabilities, Net Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Cash paid per acquiree share (in dollars per share) Business Combination, Price Per Share Defined benefit plans Other Comprehensive (Income) Loss, Defined Benefit Plan, after Tax and Reclassification Adjustment, Attributable to Parent Accessorial revenues Accessorial Revenues [Member] Represents information on accessorial revenues. Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items] Related Party Transaction [Table] Related Party Transaction [Table] Earnings per share - diluted (in dollars per share) Earnings Per Share, Diluted Forecast Forecast [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Reduction of our deferred tax expense Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability Accounts receivable, net (Note 10) Accounts Receivable, after Allowance for Credit Loss, Current Administrative Administrative Expense Administrative Expense Title of 12(b) Security Title of 12(b) Security Premium Premium [Member] Represents information regarding Premium revenues. Non-cash investing and financing activities: Cash Flow, Noncash Investing and Financing Activities Disclosure [Abstract] Retention awards Retention Awards [Member] Represents information regarding retention awards. Other Expense Other Expense [Member] AOCI Attributable to Parent, Net of Tax [Roll Forward] AOCI Attributable to Parent, Net of Tax [Roll Forward] Unsecured Notes Due December 1, 2054 Unsecured Notes Due December 1, 2054 [Member] Unsecured Notes Due December 1, 2054 Undivided investor held interest Accounts Receivable Supporting Undivided Investor Held Interest The value of the accounts receivable that supported the value of the undivided interest held by investors. Beginning balance (in shares) Ending balance (in shares) Treasury Stock, Common, Shares Equipment rents payable Accrued Rent, Current Share and per share (Note 8): Earnings Per Share [Abstract] Aggregate grant-date fair value of stock options vested Aggregate Grant Date Fair Value Of Stock Options Vested Represents the aggregate grant-date fair value of stock options vested during the period. Bulk Bulk [Member] Represents information regarding Bulk revenues. Asset-Backed Securities, Securitized Loans and Receivables Asset-Backed Securities, Securitized Loans and Receivables [Member] Short-term investments Debt Securities, Held-to-Maturity, Amortized Cost, before Allowance for Credit Loss, Current Accounts Payable and Other Current Liabilities Accounts Payable and Accrued Liabilities Disclosure [Text Block] Schedule of Acquisition-Related Expense Associated with the Merger Agreement Business Combination, Separately Recognized Transaction [Table Text Block] Other Other Miscellaneous Product and Service Revenues [Member] Represents information on other miscellaneous product and service revenues. Reportable Segment Reportable Segment [Member] Reportable Segment Share repurchase programs (Note 16) (in shares) Treasury stock, shares, acquired (in shares) Number of shares purchased (in shares) Treasury Stock, Shares, Acquired Income taxes, net of refunds Income Taxes Paid, Net Exercised (in shares) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price Award Timing Disclosures [Line Items] Proceeds from issuance of commercial paper Proceeds from Issuance of Commercial Paper Operating Loss Carryforwards [Line Items] Operating Loss Carryforwards [Line Items] Receivables facility Long-Term Debt, Gross Service cost Defined Benefit Plan, Service Cost Granted (in shares) Share-Based Compensation Arrangements by Share-Based Payment Award, Options, Grants in Period, Weighted Average Exercise Price Properties Property, Plant and Equipment Disclosure [Text Block] Properties, net (Note 11) Net book value Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Norfolk Southern Norfolk Southern [Member] Norfolk Southern Net income Net income Net income Net Income (Loss) Attributable to Parent Personal Injury Personal Injury Personal Injury [Member] The risk of loss arises with respect to personal injuries. Expiration Date Trading Arrangement Expiration Date Receivables securitization facility, issued Receivables Securitization Facility Issued Represents amount issued as part of Receivables Securitization Facility. Construction in progress Construction in Progress [Member] Other Other Accrued Liabilities, Current Award vesting period (in years) Share-Based Compensation Arrangement by Share-Based Payment Award, Award Vesting Period Debt repaid Repayments of Debt and Lease Obligation Segment Reporting Information [Line Items] Segment Reporting Information [Line Items] Share repurchase programs (Note 16) Payments for Repurchase of Common Stock Adoption Date Trading Arrangement Adoption Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Accounts receivable, net Increase (Decrease) in Accounts Receivable Entity Current Reporting Status Entity Current Reporting Status Receivables [Abstract] Business Combination, Separately Recognized Transaction [Axis] Business Combination, Separately Recognized Transaction [Axis] Debt coverage ratio Allowable Debt Per Debt To Net Worth Coverage Ratio As Defined Facility Total amount of debt (as defined in the facility) the debt-to-net-worth coverage ratio allowable under the revolving credit facility. Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Operating income Operating Income (Loss) Consolidated Entities [Domain] Consolidated Entities [Domain] Freight cars Equipment, Freight Cars [Member] Information on freight cars. Total debt less of carrying value Fair Value Of Total Debt Less Of Carrying Value Fair Value Of Total Debt Less Of Carrying Value Retained earnings Retained Earnings (Accumulated Deficit) Sites identified Sites Identified Sites identified at which Railroad is or may be liable for remediation costs associated with alleged contamination or for violations of environmental requirements. Gain recognized in other expense Gain (Loss) on Disposition of Property Plant Equipment Schedule of Stock Based Compensation Expense Share-Based Payment Arrangement, Cost by Plan [Table Text Block] Financial Instrument [Axis] Financial Instrument [Axis] Statement of Financial Position [Abstract] Statement of Financial Position [Abstract] Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested Year-end Fair Value of Equity Awards Granted in Covered Year that are Outstanding and Unvested [Member] Executive Category: Executive Category [Axis] Accrued casualty costs Current portion, ending balance at September 30, Loss Contingency, Accrual, Current ESPP employee contribution annual limit ESPP Employee Contribution Annual Limit ESPP employee contribution annual limit. Debt issued (Note 14) Proceeds from Issuance of Long-Term Debt Current Fiscal Year End Date Current Fiscal Year End Date Unrealized gain on derivative instruments Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] Unearned (in dollars per share) Share Based Compensation Arrangement By Share Based Payment Award, Equity Instruments Other Than Options, Unearned, Weighted Average Grant Date Fair Value Weighted average fair value as of the grant date of equity-based award plans other than stock (unit) option plans that were unearned. Expected life (years) Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Expected Term Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table Aggregate Grant Date Fair Value of Equity Award Amounts Reported in Summary Compensation Table [Member] Payables and Accruals [Abstract] Weighted-average grant-date fair value Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value [Abstract] Other income, net (Note 6) Other income, net Total Other Nonoperating Income (Expense) Statement [Table] Statement [Table] Maximum employee subscription rate (as a percent) Share-Based Compensation Arrangement by Share-Based Payment Award, Maximum Employee Subscription Rate Adjustments to reconcile net income to cash provided by operating activities: Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract] Financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract] Weighted-average grant-date fair value of options granted (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value Equity Awards Adjustments, Excluding Value Reported in Compensation Table Equity Awards Adjustments, Excluding Value Reported in the Compensation Table [Member] 2025 ASRs 2025 Accelerated Share Repurchase [Member] 2025 Accelerated Share Repurchase Stock options excluded as their inclusion would be anti-dilutive (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Weighted-average number of shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] All Adjustments to Compensation All Adjustments to Compensation [Member] Accounts payable and other current liabilities (Note 12) Total accounts payable and other current liabilities Accounts Payable and Accrued Liabilities, Current Amendment Flag Amendment Flag Schedule of Environmental Liability Activity Schedule of Loss Contingencies by Contingency, Environmental [Table Text Block] Tabular disclosure of the environmental loss contingencies that were reported in the period or disclosed as of the balance sheet date. Termination Date Trading Arrangement Termination Date Ties Road Ties [Member] Information on railroad ties. Cash used in financing activities Cash Provided by (Used in) Financing Activity, Including Discontinued Operation Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Measure: Measure [Axis] Schedule of Stock Option Activity Share-Based Payment Arrangement, Option, Activity [Table Text Block] Long-Lived Tangible Asset [Domain] Long-Lived Tangible Asset [Domain] Weighted average number of shares - basic (in shares) Weighted Average Number of Shares Outstanding, Basic Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Table] Schedule of Share Repurchase Programs Share Repurchase Program [Table Text Block] Tabular disclosure of information related to share repurchase programs. Schedule of Earnings Per Share, Basic and Diluted Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Work equipment and other Equipment, Work Equipment and Other [Member] Information on work and Other equipment. Share Repurchase Program [Table] Share Repurchase Program [Table] Restricted cash equivalents in other assets Restricted Cash and Cash Equivalent, Noncurrent Options exercisable (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Exercisable, Number Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Debt Disclosure [Abstract] Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Risk-free interest rate Share-Based Compensation Arrangement by Share-Based Payment Award, Fair Value Assumptions, Risk Free Interest Rate Entity Tax Identification Number Entity Tax Identification Number Scenario [Domain] Scenario [Domain] Income Tax Authority, Name [Axis] Income Tax Authority, Name [Axis] Outstanding at beginning of period (in dollars per share) Outstanding, weighted average exercise price (in dollars per share) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Consolidated Entities [Axis] Consolidated Entities [Axis] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Share-Based Compensation Arrangement by Share-Based Payment Award [Line Items] Common shares, par value (in dollars per share) Common Stock, Par or Stated Value Per Share Accounts receivable, allowance for credit loss, noncurrent Accounts Receivable, Allowance for Credit Loss, Noncurrent Common shares issued (in shares) Common Stock, Shares, Issued Granted (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Grants in Period, Gross Payments Accrual for Environmental Loss Contingencies, Payments Dividends paid Payments of Dividends Equipment and other rents Equipment and other rents Rent paid for freight cars owned by other railroads or private companies, net of rents received, including lease expenses primarily for locomotives, railcars, containers and trailers, office and other rentals. Other comprehensive income/(loss), deferred taxes Net year-to-date other comprehensive income/(loss), taxes Other Comprehensive Income (Loss), Tax, Portion Attributable to Parent Interest expense Interest expense Interest expense Interest Expense, Nonoperating Trading Arrangement: Trading Arrangement [Axis] Total Shareholder Return Amount Total Shareholder Return Amount Loss Contingencies [Line Items] Loss Contingencies [Line Items] Insider Trading Arrangements [Line Items] Security Exchange Name Security Exchange Name Other revenues Product and Service, Other [Member] Total liabilities Liabilities Capital investments accrued but not yet paid Capital Expenditures Incurred but Not yet Paid Pension Adjustments Prior Service Cost Pension Adjustments Prior Service Cost [Member] Payments Loss Contingency Accrual, Payments Operating expenses: Operating Expenses [Abstract] Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Remaining debt issuance Board Of Directors Remaining Debt Issuance Amount of debt issuance remaining under current authority by Board of Directors. Share Repurchase Program [Abstract] Statement [Line Items] Statement [Line Items] Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalent Common shares Common Stock [Member] Vested (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Vested in Period Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code Non-NEOs Non-NEOs [Member] Schedule of Additional Information Regarding Stock Option Exercises Cash Proceeds Received and Tax Benefit from Share-Based Payment Awards [Table Text Block] Net change in cash, cash equivalents, and restricted cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Mexico MEXICO