The amount of expense for contract services provided to the Company and rent paid for frieght cars owned by other railroads or private companies net of rents received, including lease expenses, primarily for locomotives, railcars, containers, and trailers. Purchased services and rents Materials and other operating expenses not separately disclosed. This element is used when other, more specific, elements are not appropriate. Materials and other Sum of operating profit (loss) and non-operating income (expense) before income taxes. Income before income taxes Railway operating revenues Railway operating expenses: Compensation and benefits Materials and other Income from railway operations Other income, net Per share amounts Fuel Depreciation (CostOfServicesDepreciation) Total railway operating expenses Interest expense on debt Provision for income taxes Net income Basic Diluted Dividends (CommonStockDividendsPerShareCashPaid) Aggregate carrying amount, as of the balance sheet date, of unapplied materials and supplies to be used in the performance or support of carrier operations. Materials and supplies (MaterialsAndSupplies) Assets (AssetsAbstract) Accounts receivable, net Other current assets Total current assets Investments (LongTermInvestments) Properties less accumulated depreciation Other assets Liabilities and stockholders' equity Income and other taxes Total current liabilities Long-term debt Deferred income taxes Additional paid-in capital Accumulated other comprehensive loss Cash and cash equivalents (CashEquivalentsAtCarryingValue) Deferred income taxes (DeferredTaxAssetsNetCurrent) Total assets Accounts payable Other current liabilities Current maturities of long-term debt Other liabilities Total liabilities Common stock $1.00 per share par value, 1,350,000,000 shares authorized; outstanding 367,636,640 and 366,233,106 shares, respectively, net of treasury shares Retained income Total stockholders' equity Total liabilities and stockholders' equity Consolidated Balance Sheets (Parenthetical) [Abstract] Consolidated Balance Sheets (Parenthetical) [Abstract] The net change during the reporting period in the aggregate value of all materials and supplies held by the reporting entity, associated with underlying transactions that are classified as operating activities. Materials and supplies (IncreaseDecreaseInMaterialsAndSupplies) The net cash inflow (outflow) from other operating activities. This element is used when there is not a more specific and appropriate element in the taxonomy. Other, net Cash flows from operating activities Reconciliation of net income to net cash provided by operating activities: (AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract) Depreciation (Depreciation) Changes in assets and liabilities affecting operations: Reconciliation of net income to net cash provided by operating activities: (AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract) Other, net Cash flows from investing activities Property additions Property sales and other transactions Investments, including short-term Investment sales and other transactions Cash flows from financing activities Dividends (PaymentsOfDividends) Purchase and retirement of common stock Proceeds from borrowings, net Cash and cash equivalents (EffectOfExchangeRateOnCashAndCashEquivalentsAbstract) Net income Deferred income taxes (DeferredIncomeTaxExpenseBenefit) Gains and losses on properties Accounts receivable Other current assets Current liabilities other than debt Net cash provided by operating activities Net cash used in investing activities Common stock issued, net Debt repayments Net cash provided by (used in) financing activities Net increase in cash and cash equivalents At beginning of year At end of period Stock-based Compensation (Unaudited) [Abstract] Stock-based Compensation (Unaudited) [Abstract] Stock-based Compensation Income Taxes (Unaudited) [Abstract] Income Taxes (Unaudited) [Abstract] Income Taxes Earnings Per Share (Unaudited) [Abstract] Earnings Per Share (Unaudited) [Abstract] Stockholders' Equity (Unaudited) [Abstract] Stockholders' Equity (Unaudited) [Abstract] Stock Repurchase Program (Unaudited) [Abstract] Stock Repurchase Program (Unaudited) [Abstract] Stock Repurchase Program Investments [Abstract] Investments [Abstract] Long-term Debt (Unaudited) [Abstract] Long-term Debt (Unaudited) [Abstract] Pension and Other Postretirement Benefits (Unaudited) [Abstract] Pension and Other Postretirement Benefits (Unaudited) [Abstract] Comprehensive Income (Unaudited) [Abstract] Comprehensive Income (Unaudited) [Abstract] Income taxes (net of refunds) Interest (net of amounts capitalized) Supplemental disclosure of cash flow information Supplemental disclosure of cash flow information Investments (InvestmentHoldingsTextBlock) Stockholders' Equity Earnings Per Share Long-term Debt Pension and Other Postretirement Benefits Comprehensive Income Note Fair Value of Financial Instruments (Unaudited) [Abstract] Fair Value of Financial Instruments (Unaudited) [Abstract] Fair Value of Financial Instruments Commitments and Contingencies (Unaudited) [Abstract] Commitments and Contingencies (Unaudited) [Abstract] Commitments and Contingencies (CommitmentsAndContingenciesDisclosureTextBlock) Income Statement [Abstract] Statement [Table] Statement, Scenario [Axis] Scenario, Unspecified [Domain] Statement [Line Items] Revenues, Total Net Income (Loss) Available to Common Stockholders, Basic [Abstract] Net Income (Loss) Attributable to Parent [Abstract] Net Income (Loss), Including Portion Attributable to Noncontrolling Interest [Abstract] Income (Loss) before Cumulative Effect of Change in Accounting Principle [Abstract] Income (Loss) before Extraordinary Items and Cumulative Effect of Change in Accounting Principle [Abstract] Income (Loss) from Continuing Operations, Including Portion Attributable to Noncontrolling Interest [Abstract] Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Cumulative Effects of Changes in Accounting Principles, Noncontrolling Interest [Abstract] Operating Income (Loss) [Abstract] Revenues [Abstract] Sales Revenue, Net [Abstract] Sales Revenue, Goods, Net [Abstract] Sales Revenue, Goods, Gross Sales Returns and Allowances, Goods [Abstract] Sales Returns, Goods Sales Allowances, Goods Sales Returns and Allowances, Goods Sales Returns and Allowances, Goods, Total Sales Discounts, Goods Sales Revenue, Goods, Net Sales Revenue, Goods, Net, Total Shipping and Handling Revenue Sales Revenue, Services, Net [Abstract] Sales Revenue, Services, Other Technology Services Revenue License and Maintenance Revenue License and Services Revenue Maintenance Revenue Contracts Revenue Revenue, Environmental Remediation Services Revenue, Oil and Gas Services Revenue, Coal Services Sales Allowances, Services Sales Discounts, Services Sales Revenue, Services, Net Sales Revenue, Services, Net, Total Sales Revenue from Energy Commodities and Services [Abstract] Sales Revenue, Energy Services Sales Revenue from Energy Commodities and Services Sales Revenue from Energy Commodities and Services, Total Electric and Gas Revenue [Abstract] Electric Revenue [Abstract] Electric Bundled Revenue Electrical Generation Revenue Competitive Energy Revenue Electrical Transmission and Distribution Revenue [Abstract] Electrical Transmission Revenue Electrical Distribution Revenue Electrical Transmission and Distribution Revenue Electrical Transmission and Distribution Revenue, Total Electric Domestic Regulated Revenue Electric Worldwide Unregulated Revenue Electric Revenue Electric Revenue, Total Gas Domestic Regulated Revenue Electric and Gas Revenue Electric and Gas Revenue, Total Phase-in Plan, Amount of Capitalized Costs Recovered Revenue Mineral Sales [Abstract] Gold Products and Services Revenue Coal Products and Services Revenue Chemicals Revenue Revenue Mineral Sales Revenue Mineral Sales, Total Secondary Processing Revenue Oil and Gas Revenue [Abstract] Oil and Gas Sales Revenue Synthetic Fuel Sales Revenue Other Alternative Energy Sales Revenue Binder Sales Revenue Exploration and Production Revenue Natural Gas Midstream Revenue [Abstract] Natural Gas Storage Revenue Fractionation Revenue Natural Gas Midstream Revenue Natural Gas Midstream Revenue, Total Refining and Marketing Revenue Marine Services Revenue Natural Gas Production Revenue Brokered Natural Gas Margin Revenue Propane Revenue Revenue from Purchased Oil and Gas Oil and Condensate Revenue Gas Gathering, Transportation, Marketing and Processing Revenue Oil and Gas Revenue Oil and Gas Revenue, Total Sales of Oil and Gas Prospects Royalty Revenue [Abstract] Royalty Revenue from Coal Royalty Revenue Royalty Revenue, Total Revenue Steam Products and Services Real Estate Revenue, Net [Abstract] Construction Revenue [Abstract] Home Building Revenue General Contractor Revenue Other Construction Revenue Construction Revenue Construction Revenue, Total Land Sales Retail Land Sales, Improvement Revenue, Prior Sales Time Share Revenue Tenant Reimbursements Management Fees Revenue [Abstract] Management Fees, Base Revenue Management Fees, Incentive Revenue