Related Party Transactions [Abstract] Schedule of Related Party Transactions, by Related Party [Table] Schedule of Related Party Transactions, by Related Party [Table] Related Party [Axis] Related Party [Axis] Related Party [Domain] Related Party [Domain] Parent Company Parent Company [Member] Related Party Transaction [Line Items] Related Party Transaction [Line Items] Cash distributions Cash Distributions/ Dividends Paid The cash outflow from the distribution of an entity's earnings in the form of dividends to common shareholders or distributions to the parent company. Tax payments to parent company Income Tax Payments, To Parent By Reporting Entity Income Tax Payments, To Parent By Reporting Entity Related Party Transaction Revenue with Affiliates Revenue from Related Parties Related Party Transaction Expenditures From Transactions With Affiliates Related Party Transaction Expenditures From Transactions with Affiliates Expenditures recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party. Tax Refund from Parent Company Tax Refund from Parent Company Tax Refund from Parent Company Receivables [Abstract] Allowance for bill adjustments and uncollectible accounts Allowance for Bill Adjustments and Doubtful Accounts Receivable, Current A valuation allowance for trade and other receivables due to an Entity within one year (or the normal operating cycle, whichever is longer) that have bill adjustments or are expected to be uncollectible. Accounts receivable greater than 90 days old Accounts Receivable, Current, Greater than 90 Days Past Due Accounts Receivable, Current, Greater than 90 Days Past Due Statement of Financial Position [Abstract] Statement [Table] Statement [Table] Scenario [Axis] Scenario [Axis] Scenario, Unspecified [Domain] Scenario, Unspecified [Domain] Statement [Line Items] Statement [Line Items] ASSETS Assets [Abstract] Accumulated depreciation Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment Income Statement [Abstract] Revenues Revenue, Net Operating expenses: Operating Expenses [Abstract] Compensation and benefits Labor and Related Expense Fuel Fuel Costs Purchased services Purchased services The amount of expense for contract services provided to the Company. Depreciation and amortization Depreciation, Depletion and Amortization Equipment rents Equipment 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. Materials and other Materials and other Materials and other operating expenses not separately disclosed. This element is used when other, more specific, elements are not appropriate. Total operating expenses Operating Expenses Operating income Operating Income (Loss) Interest expense Interest and Debt Expense Other expense, net Other Nonoperating Income (Expense) Total before tax Income (Loss) from Continuing Operations before Income Taxes, Extraordinary Items, Noncontrolling Interest Income tax expense Income Tax Expense (Benefit) Net income Net Income (Loss) Attributable to Parent Commitments and Contingencies Disclosure [Abstract] Loss Contingencies [Table] Loss Contingencies [Table] Balance Sheet Location [Axis] Balance Sheet Location [Axis] Balance Sheet Location [Domain] Balance Sheet Location [Domain] Current Liabilities [Member] Current Liabilities [Member] Current Liabilities [Member] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Axis] Cash and Cash Equivalents [Domain] Cash and Cash Equivalents [Domain] Bank Time Deposits and Money Market Funds Commercial Paper, Bank Time Deposits, and Money Market Funds [Member] Commercial Paper, Bank Time Deposits, and Money Market Funds [Member] Legal Entity [Axis] Legal Entity [Axis] Entity [Domain] Entity [Domain] BNSF Insurance Company BNSF Insurance Company [Member] BNSF Insurance Company [Member] Loss Contingency Nature [Axis] Loss Contingency Nature [Axis] Loss Contingency, Nature [Domain] Loss Contingency, Nature [Domain] Unasserted Claim Unasserted Claim [Member] Personal Injury Personal Injury [Member] Personal Injury [Member] Loss Contingencies [Line Items] Loss Contingencies [Line Items] Asbestos and Personal Injury [Abstract] Loss Contingency, Estimate [Abstract] Percent of future unasserted asbestos claims to be filed within the next ten years Percent of Future Unasserted Asbestos Claims To be Filed Within the Next Ten Years Percent of Future Unasserted Asbestos Claims To be Filed Within the Next Ten Years Percent of future unasserted asbestos claims to be filed within the next fifteen years Percent of Future Unasserted Asbestos Claims to be Filed Within the Next Fifteen Years Percent of Future Unasserted Asbestos Claims to be Filed Within the Next Fifteen Years Percent of future unasserted asbestos claims to be filed within the next twenty-five years Percent of Future Unasserted Asbestos Claims to be Filed Within the Next Twenty-five Years Percent of Future Unasserted Asbestos Claims to be Filed Within the Next Twenty-five Years Length in years for 60 percent of future unasserted asbestos claims to be filed Length in Years for 60 Percent of Future Unasserted Asbestos Claims to be Filed Length in Years for 60% of Future Unasserted Asbestos Claims to be Filed Length in years for 80 percent of future unasserted asbestos claims to be filed Length in Years for 80 Percent of Future Unasserted Asbestos Claims to be Filed Length in Years for 80 Percent of Future Unasserted Asbestos Claims to be Filed Length in years for 95 percent of future unasserted asbestos claims to be filed Length in Years for 95 Percent of Future Unasserted Claims to be Filed Length in Years for 95 Percent of Future Unasserted Claims to be Filed Accrued obligations for asbestos and other personal injury matters, current liabilities Loss Contingency, Accrual, Current Future costs to settle personal injury claims, minimum Loss Contingency, Range of Possible Loss, Minimum Future costs to settle personal injury claims, maximum Loss Contingency, Range of Possible Loss, Maximum Loss Contingency Accrual [Roll Forward] Loss Contingency Accrual [Roll Forward] Beginning balance Loss Contingency Accrual Accruals Loss Contingency Accrual, Provision Payments Loss Contingency Accrual, Payments Ending balance Cash and Cash Equivalents [Abstract] Cash and Cash Equivalents [Abstract] Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Compensation and Retirement Disclosure [Abstract] Schedule of Defined Benefit Plans Disclosures [Table] Schedule of Defined Benefit Plans Disclosures [Table] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Axis] Defined Benefit Plans and Other Postretirement Benefit Plans [Domain] Defined Benefit Plan and Other Postretirement Benefit Plan [Domain] Pension Plans, Defined Benefit Pension Plan, Defined Benefit [Member] Retiree Health and Welfare Benefits Other Postretirement Benefit Plan, Defined Benefit [Member] Defined Benefit Plan Disclosure [Line Items] Defined Benefit Plan Disclosure [Line Items] Schedule of Net Benefit Costs Schedule of Net Benefit Costs [Table Text Block] Related Party Transactions Related Party Transactions Disclosure [Text Block] Consolidated Statements of Changes in Equity [Abstract] Consolidated Statements of Changes in Equity [Abstract] Equity Components [Axis] Equity Components [Axis] Equity Component [Domain] Equity Component [Domain] Members Equity Members Equity [Member] Member's equity. Accumulated Other Comprehensive Income (Loss) Accumulated Other Comprehensive Income (Loss) [Member] Increase (Decrease) in Member's Equity [Roll Forward] Increase (Decrease) In Members Equity [Roll Forward] [Roll Forward] Increase (Decrease) In Members Equity [Roll Forward] [Roll Forward] Balance Stockholders' Equity Attributable to Parent Cash distributions to Parent Comprehensive income, net of tax Comprehensive Income (Loss), Net of Tax, Attributable to Parent Balance Organization, Consolidation and Presentation of Financial Statements [Abstract] Schedule of Variable Interest Entities Schedule of Variable Interest Entities [Table Text Block] Accounting Policies and Interim Results Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block] Schedule of Variable Interest Entities [Table] Schedule of Variable Interest Entities [Table] Variable Interest Entities [Axis] Variable Interest Entities [Axis] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Classification [Domain] Variable Interest Entity, Not Primary Beneficiary Variable Interest Entity, Not Primary Beneficiary [Member] Variable Interest Entity, Primary Beneficiary Variable Interest Entity, Primary Beneficiary [Member] Variable Interest Entity [Line Items] Variable Interest Entity [Line Items] Company limited partner holding interest, percentage Variable Interest Entity, Qualitative or Quantitative Information, Ownership Percentage General partner holding interest, percentage Limited Liability Company (LLC) or Limited Partnership (LP), Managing Member or General Partner, Ownership Interest Unconsolidated Partnership, assets Variable Interest Entity, Assets Variable Interest Entity, Assets Unamortized investment balance classified as Other Assets Variable Interest Entity, Nonconsolidated, Unamortized Investment Balance Variable Interest Entity, Nonconsolidated, Unamortized Investment Balance Remaining commitments classified as Other Liabilities Other Commitment Maximum exposure to loss Variable Interest Entity, Reporting Entity Involvement, Maximum Loss Exposure, Amount Remaining commitments expected to be paid in 2014 Other Commitment, Due in Next Twelve Months Other Assets Other Asset, Investment in Variable Interest Entity [Text Block] Other Asset, Investment in Variable Interest Entity [Text Block] Environmental Issue Environmental Issue [Member] Number of alleged environmental contamination sites (in sites) Administrative Judicial and Other Mandatory Cleanup Efforts Total Sites Administrative, Judicial and Other Mandatory Cleanup Efforts, Total Sites Number of environmental superfund sites (in sites) Administrative Judicial and Other Mandatory Cleanup Efforts Superfund Sites Administrative, Judicial and Other Mandatory Cleanup Efforts, Superfund Sites Liability for third-party tort claims Recorded Liability For Third Party Environmental Tort Claims Recorded Liability For Third Party Environmental Tort Claims Accrued obligations for environmental matters, current liabilities Accrued Environmental Loss Contingencies, Current Future costs for environmental liabilities, minimum Future costs for environmental liabilities, maximum Site Contingency, Estimated Time Frame for Accrued Cost Distributions Site Contingency, Estimated Time Frame for Accrued Cost Distributions Site Contingency, Estimated Time Frame for Accrued Cost Distributions Accrual for Environmental Loss Contingencies [Roll Forward] Accrual for Environmental Loss Contingencies [Roll Forward] Beginning balance Accrual for Environmental Loss Contingencies Accruals Accrual For Environmental Loss Contingencies Provision Accrual For Environmental Loss Contingencies Provision Payments Accrual for Environmental Loss Contingencies, Payments Ending balance Schedule of Loss Contingencies by Contingency Schedule of Loss Contingencies by Contingency [Table Text Block] Accrued Obligations for Environmental Matters Accrual for Environmental Loss Contingencies [Table Text Block] Accrual for Environmental Loss Contingencies [Table Text Block] Employment Benefit Plans Pension and Other Postretirement Benefits Disclosure [Text Block] Accumulated Other Comprehensive Income (Loss), Net of Tax [Abstract] Accumulated Other Comprehensive Income (Loss) [Table] Accumulated Other Comprehensive Income (Loss) [Table] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Axis] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Domain] Reclassification out of Accumulated Other Comprehensive Income [Member] Reclassification out of Accumulated Other Comprehensive Income [Member] Equity Method Investments [Member] Equity Method Investments [Member] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Defined Benefit Plans Adjustment [Member] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Line Items] Accumulated Other Comprehensive Income (Loss) [Roll Forward] Accumulated Other Comprehensive Income (Loss), Net of Tax [Roll Forward] A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. Accumulated Other Comprehensive Income (Loss), Beginning balance Accumulated Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss) before Reclassifications Other Comprehensive Income (Loss), before Reclassifications, Net of Tax Amounts reclassified from accumulated other comprehensive income (loss) Reclassification from Accumulated Other Comprehensive Income, Current Period, before Tax Accumulated Other Comprehensive Income (Loss), Ending balance Comprehensive Income Comprehensive Income (Loss) Note [Text Block] OCI Parenthetical [Abstract] OCI Parenthetical [Abstract] Change in amortization of accumulated actuarial losses and prior service costs, net of tax benefit Change In Unrecognized Prior Service Credit And Actuarial Losses Tax Benefit (Expense) Change In Unrecognized Prior Service Credit And Actuarial Losses Tax Benefit (Expense) Debt Disclosure [Abstract] Schedule of Operating Leased Assets [Table] Schedule of Operating Leased Assets [Table] Parties to Contractual Arrangement [Axis] Parties to Contractual Arrangement [Axis] Parties to Contractual Arrangement [Domain] Parties to Contractual Arrangement [Domain] Reporting Entity Reporting Entity [Member] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Axis] Property, Plant and Equipment, Type [Domain] Property, Plant and Equipment, Type [Domain] Equipment Equipment [Member] Operating Leased Assets [Line Items] Operating Leased Assets [Line Items] Future minimum lease payments Operating Leases, Future Minimum Payments Due Equity [Abstract] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification out of Accumulated Other Comprehensive Income [Table] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] Actuarial losses Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Gain (Loss), before Tax Prior service credits Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax Total before tax Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest Tax expense or (benefit) Current assets: Assets, Current [Abstract] Accounts receivable, net Accounts Receivable, Net, Current Materials and supplies Materials, Supplies, and Other Current portion of deferred income taxes Deferred Tax Assets, Net of Valuation Allowance, Current Other current assets Other Assets, Current Total current assets Assets, Current Property and equipment, net of accumulated depreciation of $2,904 and $2,232, respectively Property, Plant and Equipment, Net Goodwill Goodwill Intangible assets, net Finite-Lived Intangible Assets, Net Other assets Other Assets, Noncurrent Total assets Assets LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Current liabilities: Liabilities, Current [Abstract] Accounts payable and other current liabilities Accounts Payable and Accrued Liabilities, Current Long-term debt due within one year Long-term Debt and Capital Lease Obligations, Current Total current liabilities Liabilities, Current Long-term debt Long-term Debt and Capital Lease Obligations Deferred income taxes Deferred Tax Liabilities, Net, Noncurrent Intangible liabilities, net Intangible liabilities, net The aggregate sum of gross carrying value of a major finite-lived intangible liability class, less accumulated amortization and any impairment charges. Casualty and environmental liabilities Casualty and environmental liabilities Noncurrent portion of costs accrued as of the balance sheet date for casualty, environmental and other loss contingencies. Pension and retiree health and welfare liability Pension and Other Postretirement Defined Benefit Plans, Liabilities, Noncurrent Other liabilities Other Liabilities, Noncurrent Total liabilities Liabilities Commitments and contingencies (see Notes 5 and 6) Commitments and Contingencies Equity: Stockholders' Equity Attributable to Parent [Abstract] Member's Equity Members' Equity Accumulated other comprehensive income Total equity Total liabilities and equity Liabilities and Equity New Accounting Pronouncements and Changes in Accounting Principles [Abstract] Accounting Pronouncements New Accounting Pronouncements and Changes in Accounting Principles [Text Block] Schedule of Guarantor Obligations Schedule of Guarantor Obligations [Table Text Block] Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract] Schedule of Finite-Lived Intangible Assets and Liabilities Schedule of Finite-Lived Intangible Assets and Liabilities [Table Text Block] Schedule of Finite-Lived Intangible Assets and Liabilities [Table Text Block] Schedule of Finite-Lived Intangible Assets and Liabilities Amortization Expense Schedule of Finite-Lived Intangible Assets and Liabilities Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets and Liabilities Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets and Liabilities, Future Amortization Expense Schedule of Finite-Lived Intangible Assets and Liabilities, Future Amortization Expense [Table Text Block] Schedule of Finite-Lived Intangible Assets and Liabilities, Future Amortization Expense [Table Text Block] Accounts Receivable, Net Loans, Notes, Trade and Other Receivables Disclosure [Text Block] Schedule of Business Acquisitions, by Acquisition [Table] Schedule of Business Acquisitions, by Acquisition [Table] Business Acquisition [Axis] Business Acquisition [Axis] Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Burlington Northern Santa Fe Corporation Northern Sante Fe Corporation [Member] Northern Sante Fe Corporation [Member] Business Acquisition [Line Items] Business Acquisition [Line Items] Acquired remaining outstanding shares, percentage Business Combination, Step Acquisition, Remaining Equity Interest Acquired, Percentage In a business combination achieved in stages, this element represents the percentage aquired of the remaining equity interest in the acquiree not already owned. Entities [Table] Entity Information [Line Items] Entity Information [Line Items] Entity Registrant Name Entity Registrant Name Entity Central Index Key Entity Central Index Key Current Fiscal Year End Date Current Fiscal Year End Date Entity Filer Category Entity Filer Category Document Type Document Type Document Period End Date Document Period End Date Document Fiscal Year Focus Document Fiscal Year Focus Document Fiscal Period Focus Document Fiscal Period Focus Amendment Flag Amendment Flag Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Entity Well-known Seasoned Issuer Entity Well-known Seasoned Issuer Entity Voluntary Filers Entity Voluntary Filers Entity Current Reporting Status Entity Current Reporting Status Consolidated Statements of Comprehensive Income [Abstract] Consolidated Statements of Comprehensive Income [Abstract] Net income Other comprehensive income: Other Comprehensive Income (Loss), Net of Tax [Abstract] Change in amortization of accumulated actuarial losses and prior service credits, net of tax benefit of $0 million, $2 million, $0 million and $4 million, respectively Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax Change in accumulated other comprehensive income of equity method investees Change in Other Comprehensive Income of Equity Method Investees Change in Other Comprehensive Income of Equity Method Investees Other Comprehensive Income (Loss), Net of Tax Other Comprehensive Income (Loss), Net of Tax Total comprehensive income Schedule of Finite-Lived Intangible Assets [Table] Schedule of Finite-Lived Intangible Assets [Table] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets by Major Class [Axis] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets, Major Class Name [Domain] Finite-Lived Intangible Assets [Line Items] Finite-Lived Intangible Assets [Line Items] Amortized intangible assets, gross carrying amount Finite-Lived Intangible Assets, Gross Amortized intangible assets, accumulated amortization Finite-Lived Intangible Assets, Accumulated Amortization Amortized intangible liabilities, gross carrying amount Finite-Lived Intangible Liabilities, Gross Amount before amortization of liabilities, excluding financial liabilities, lacking physical substance with a finite life. Amortized intangible liabilities, accumulated amortization Finite-Lived Intangible Liabilities, Accumulated Amortization Finite-Lived Intangible Liabilities, Accumulated Amortization Amortization of Intangible Assets Amortization of Intangible Assets Amortization of Intangible Liabilities Amortization of Intangible Liabilities Amortization of Intangible Liabilities Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] Amortization of intangible assets, Remainder of 2014 Finite-Lived Intangible Assets, Amortization Expense, Remainder of Fiscal Year Amortization of intangible liabilities, Remainder of 2014 Finite-Lived Intangible Liabilities, Amortization Expense, Remainder of Fiscal Year Finite-Lived Intangible Liabilities, Amortization Expense, Remainder of Fiscal Year Amortization of intangible assets, 2015 Finite-Lived Intangible Assets, Amortization Expense, Year Two Amortization of intangible liabilities, 2015 Finite-Lived Intangible Liabilities, Amortization Expense, Year Two Finite-Lived Intangible Liabilities, Amortization Expense, Year Two Amortization of intangible assets, 2016 Finite-Lived Intangible Assets, Amortization Expense, Year Three Amortization of intangible liabilities, 2016 Finite-Lived Intangible Liabilities, Amortization Expense, Year Three Finite-Lived Intangible Liabilities, Amortization Expense, Year Three Amortization of intangible assets, 2017 Finite-Lived Intangible Assets, Amortization Expense, Year Four Amortization of intangible liabilities, 2017 Finite-Lived Intangible Liabilities, Amortization Expense, Year Four Finite-Lived Intangible Liabilities, Amortization Expense, Year Four Amortization of intangible assets, 2018 Finite-Lived Intangible Assets, Amortization Expense, Year Five Amortization of intangible liabilities, 2018 Finite-Lived Intangible Liabilities, Amortization Expense, Year Five Finite-Lived Intangible Liabilities, Amortization Expense, Year Five Schedule of Accumulated Other Comprehensive Income (Loss) Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Reclassification out of Accumulated Other Comprehensive Income [Table Text Block] Schedule of Guarantor Obligations [Table] Schedule of Guarantor Obligations [Table] Guarantee Entity Name [Axis] Guarantee Entity Name [Axis] Guarantee Entity Name [Axis] Guarantee Entity Name [Domain] Guarantee Entity Name [Domain] Guarantee Entity Name [Domain] Kinder Morgan Energy Partners, L.P. Kinder Morgan Energy Partners, L.P. [Member] Kinder Morgan Energy Partners, L.P. [Member] Chevron Phillips Chemical Company, LP Chevron Phillips Chemical Company, LP [Member] Chevron Phillips Chemical Company, LP [Member] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Axis] Guarantor Obligations, Nature [Domain] Guarantor Obligations, Nature [Domain] Payment Guarantee Payment Guarantee [Member] Indemnification Agreement Indemnification Agreement [Member] Guarantor Obligations [Line Items] Guarantor Obligations [Line Items] BNSF Ownership Percentage Noncontrolling Interest, Ownership Percentage by Parent Principal Amount Guaranteed Principal Amount Guaranteed Principal Amount Guaranteed Maximum Future Payments Guarantor Obligations, Maximum Exposure, Undiscounted Maximum Recourse Amount Maximum Recourse Amount Maximum Recourse Amount Remaining Term (in years) Remaining Term Remaining Term Capitalized Obligations Guarantor Obligations, Current Carrying Value Other Intangible Assets and Liabilities Goodwill And Other Intangible Assets and Liabilities [Text Block] Goodwill And Other Intangible Assets and Liabilities [Text Block] Related Party Transaction [Axis] Related Party Transaction [Axis] Related Party Transaction [Domain] Related Party Transaction [Domain] Schedule of Related Party Transactions [Table Text Block] Schedule of Related Party Transactions [Table Text Block] Service cost Defined Benefit Plan, Service Cost Interest Cost Defined Benefit Plan, Interest Cost Amortization of Prior Service Credits Defined Benefit Plan, Amortization of Prior Service Cost (Credit) Expected return on plan assets Defined Benefit Plan, Expected Return on Plan Assets Amortization of net loss Defined Benefit Plan, Future Amortization of Gain (Loss) Net cost recognized Defined Benefit Plan, Net Periodic Benefit Cost Statement of Cash Flows [Abstract] OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Net income Adjustments to reconcile net income to net cash provided by operating activities: Adjustments, Noncash Items, to Reconcile Net Income (Loss) to Cash Provided by (Used in) Operating Activities [Abstract] Deferred income taxes Deferred Income Tax Expense (Benefit) Long-term casualty and environmental liabilities, net Long term casualty and environmental liabilities, net The net change during the reporting period in the amount of noncurrent costs accrued for casualty, environmental and other loss contingencies. Contribution to defined benefit pension plan Pension Contributions Other, net Other Operating Activities, Cash Flow Statement Changes in current assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Accounts receivable, net Increase (Decrease) in Accounts Receivable Materials and supplies Increase (Decrease) in Materials and Supplies Other current assets Increase (Decrease) in Other Current Assets Accounts payable and other current liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Capital expenditures excluding equipment Capital Expenditures Excluding Equipment The cash outflow associated with the acquisition of long-lived, physical assets, excluding equipment, that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets. Acquisition of equipment Acquisition of equipment The cash outflow associated with the acquisition of equipment which includes locomotive, freight cars and other equipment, some or all of which may be sold and leased back by the Company through either an operating or capital lease. Other, net Payments for (Proceeds from) Other Investing Activities Net cash used for investing activities Net Cash Provided by (Used in) Investing Activities FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Proceeds from issuance of long-term debt Proceeds from Issuance of Long-term Debt Payments on long-term debt Repayments of Long-term Debt Cash distributions Other, net Proceeds from (Payments for) Other Financing Activities Net cash used for financing activities Net Cash Provided by (Used in) Financing Activities Decrease in cash and cash equivalents Cash and Cash Equivalents, Period Increase (Decrease) Cash and cash equivalents: Cash and Cash Equivalents, at Carrying Value [Abstract] Beginning of period End of period SUPPLEMENTAL CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Interest paid, net of amounts capitalized Interest Paid, Net Capital investments accrued but not yet paid Capital Expenditures Incurred but Not yet Paid Income taxes paid, net of refunds Income Taxes Paid, Net Schedule of Long-term Debt Instruments [Table] Schedule of Long-term Debt Instruments [Table] Long-term Debt, Type [Axis] Long-term Debt, Type [Axis] Long-term Debt, Type [Domain] Long-term Debt, Type [Domain] Corporate Debt Securities Corporate Debt Securities [Member] SEC Debt Shelf Registration SEC Debt Shelf Registration [Member] SEC Debt Shelf Registration [Member] Junior Subordinated Debt Junior Subordinated Debt [Member] Debt Instrument [Axis] Debt Instrument [Axis] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Three Point Seven Five Zero Percent Debentures Due April 1, 2024 [Member] Three Point Seven Five Zero Percent Debentures Due April 1, 2024 [Member] [Member] Three Point Seven Five Zero Percent Debentures Due April 1, 2024 [Member] [Member] Four Point Nine Zero Zero Percent Debentures Due April 1, 2044 [Member] Four Point Nine Zero Zero Percent Debentures Due April 1, 2044 [Member] [Member] Four Point Nine Zero Zero Percent Debentures Due April 1, 2044 [Member] Debt Instrument [Line Items] Debt Instrument [Line Items] Additional Debt Securities Authorized For Issuance By The Board of Managers Additional Debt Securities Authorized For Issuance By The Board of Managers Additional Debt Securities Authorized For Issuance By The Board of Managers Debentures issued amount Debt Instrument, Face Amount Debentures interest rate Debt Instrument, Interest Rate, Stated Percentage Remaining amount of debt securities that may be issued Debt Instrument, Unused Borrowing Capacity, Amount Subordinated notes related to financial covenants Debt Instrument, Covenant Debt Certain issued and outstanding junior subordinated notes pertaining to certain financial covenants. Debt, fair value Long-term Debt, Fair Value Debt, book value Long-term Debt Debt Debt Disclosure [Text Block]