Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Weighted-average shares outstanding: Weighted Average Number of Shares Outstanding, Diluted [Abstract] Trading Arrangement: Trading Arrangement [Axis] 4.30%, Senior Unsecured Notes, Due 2029 Four Point Three Zero Percent, Senior Unsecured Notes, Due Twenty Twenty Nine [Member] Four Point Three Zero Percent, Senior Unsecured Notes, Due Twenty Twenty Nine Title of 12(b) Security Title of 12(b) Security Document Fiscal Year Focus Document Fiscal Year Focus Long-term debt weighted-average interest rate Debt, Weighted Average Interest Rate Thereafter Unrecorded Unconditional Purchase Obligation To Be Paid After Year Four Unrecorded Unconditional Purchase Obligation To Be Paid After Year Four Adjustment to Compensation, Amount Adjustment to Compensation Amount Segment Reporting [Abstract] Segment Reporting [Abstract] Common stock, $0.10 par value; 500 million shares authorized; 150 million shares issued and 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Adjustments [Member] Schedule of Purchase Commitments Unrecorded Unconditional Purchase Obligations Disclosure [Table Text Block] Funded status Defined Benefit Plan, Funded (Unfunded) Status of Plan TOTAL LIABILITIES AND (DEFICIT) EQUITY Liabilities and Equity Employee Stock Option Share-Based Payment Arrangement, Option [Member] Schedule Of Revenues From External Customers And Long Lived Assets [Table] Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Table] Schedule of Defined Benefit Plan, Assumptions Defined Benefit Plan, Assumptions [Table Text Block] Segments [Axis] Segments [Axis] Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Related and Nonrelated Parties [Domain] Related and Nonrelated Parties [Domain] Tabular List, Table Tabular List [Table Text Block] Other retirement plans income, net Defined Benefit Plan, Other Cost (Credit) Other, net Other Nonoperating Income (Expense) LONG-TERM DEBT Long-Term Debt [Text Block] Name Awards Close in Time to MNPI Disclosures, Individual Name 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] Other Other [Member] Other Recoveries collected SEC Schedule, 12-09, Valuation Allowances and Reserves, Addition, Recovery Incorporation, number of shares outstanding (in shares) Stockholders' Equity, Incorporation, Number Of Shares Outstanding Stockholders' Equity, Incorporation, Number Of Shares Outstanding Net transfers to Parent Payments To Parent, Net, Financing Activities Payments To Parent, Net, Financing Activities Receivables, less allowances of $196 and $204 Receivables, Net, Current Adjustment to Compensation: Adjustment to Compensation [Axis] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount Interest Interest Paid, Excluding Capitalized Interest, Operating Activity Capital expenditures Payments to Acquire Productive Assets Statement of Cash Flows [Abstract] Credit Facility [Axis] Credit Facility [Axis] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Corporate and other allocations Corporate And Other Allocations [Member] Corporate And Other Allocations Long-term debt, less current portion Long-Term Debt and Lease Obligation Name Measure Name Schedule of Revenue Adjustments Schedule Of Revenue Adjustments [Table Text Block] Schedule Of Revenue Adjustments Accounts payable Accounts Payable, Current Pay vs Performance Disclosure [Line Items] Other noncash items including leases and deferred income taxes Other Noncash Income (Expense) Debt Instrument [Line Items] Debt Instrument [Line Items] Other current assets Increase (Decrease) in Other Current Assets Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Retirement Plan Type Retirement Plan Type [Domain] Additional Paid-in Capital Additional Paid-in Capital [Member] Entity Filer Category Entity Filer Category Insurance and claims General Insurance Expense Present value of lease liability Lessee, Operating Lease And Finance Lease, Liability Operating lease and finance lease liability. Name Trading Arrangement, Individual Name Discount rate used to determine net periodic benefit cost Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate Finance Leases Finance Lease, Liability, to be Paid, Fiscal Year Maturity [Abstract] 4.95%, Senior Unsecured Notes, Due 2033 Four Point Nine Five Percent, Senior Unsecured Notes, Due Twenty Thirty Three [Member] Four Point Nine Five Percent, Senior Unsecured Notes, Due Twenty Thirty Three SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] Company Selected Measure Amount Company Selected Measure Amount Depreciation and amortization Depreciation and amortization Depreciation, Depletion and Amortization 2030 Unrecorded Unconditional Purchase Obligation, to be Paid, Year Four Interest crediting rate used to determine benefit obligation and net periodic benefit cost Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Crediting Rate Defined Benefit Plan Assumptions Used Calculating Net Periodic Benefit Cost Interest Crediting Rate Shares issued under employee incentive plans (in shares) Shares Issued, Shares, Share-Based Payment Arrangement, after Forfeiture Right-of-use assets obtained in exchange for new finance lease liabilities Right-of-Use Asset Obtained in Exchange for Finance Lease Liability Current assets Assets, Current [Abstract] 4.65%, Senior Unsecured Notes, Due 2031 Four Point Six Five Percent, Senior Unsecured Notes, Due Twenty Thirty One [Member] Four Point Six Five Percent, Senior Unsecured Notes, Due Twenty Thirty One Non-PEO NEO Non-PEO NEO [Member] Senior Notes Senior Notes [Member] Entity Address, Address Line One Entity Address, Address Line One Right-of-use assets obtained in exchange for new operating lease liabilities Right-of-Use Asset Obtained in Exchange for Operating Lease Liability Provision for income taxes Income Tax Expense (Benefit) SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward] Award Timing Method Award Timing Method [Text Block] CONSOLIDATION Consolidation, Policy [Policy Text Block] Net increase (decrease) in cash Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Including Exchange Rate Effect and Discontinued Operation Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] RECENT ACCOUNTING GUIDANCE Accounting Standards Update and Change in Accounting Principle [Text Block] Net income Net income Net income Net Income (Loss) Attributable to Parent Long-Term Debt, Type [Axis] Long-Term Debt, Type [Axis] Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Proceeds from asset dispositions and other Proceeds from Sale of Property, Plant, and Equipment Statement [Table] Statement [Table] Total lease payments Lessee, Operating Lease And Financing Lease, Liability, To Be Paid Lessee operating lease and finance lease liability payments due. Restatement Determination Date: Restatement Determination Date [Axis] Interest income Related party interest income Investment Income, Interest Receivables Increase (Decrease) in Receivables Gross contract assets Contract with Customer, Asset, before Allowance for Credit Loss Transition Report Transition Report Transition Report 2026 (remainder) Unrecorded Unconditional Purchase Obligation, to be Paid, Remainder of Fiscal Year Pension Benefits Adjustments, Footnote Pension Benefits Adjustments, Footnote [Text Block] Purchased transportation Purchased Transportation Costs Purchased Transportation Costs