No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Converted performance stock award vesting price No authoritative reference available. Net proceeds/(payments) for investing activities with consolidated subsidiaries. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. ExxonMobil equity excluding earnings reinvested. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule Of Guarantees [Text Block] No authoritative reference available. Net cash (outflow)/inflow to reacquire or issue common stock previously reacquired. No authoritative reference available. No authoritative reference available. No authoritative reference available. Net rental cost. No authoritative reference available. Percentage increase in unrecognized tax benefits. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of condensed consolidated balance sheet. No authoritative reference available. Worldwide Current Tax Expense Benefit No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Insurance contracts at contract value. No authoritative reference available. Third open tax years by major tax jurisdiction No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan Target Allocation To Private Equity Venture Capital No authoritative reference available. Other US Dollar Obligations No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of notes, accounts receivable and payable, loans payable, and accrued liabilities. No authoritative reference available. Notional daily commodity volume associated with the derivative contracts expressed in millions of cubic feet daily for natural gas and thousands of barrels daily for crude oil. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash flow adjustment for other long-term obligations accrued expense included in income in excess of / (less than) payments and settlements. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Investments, advances and long-term receivables. No authoritative reference available. No authoritative reference available. No authoritative reference available. Underlying fixed price per unit to be received in exchange for the market price on the derivative settlement date. No authoritative reference available. No authoritative reference available. No authoritative reference available. Asset Retirement Obligation Reduction Due To Property Sales No authoritative reference available. No authoritative reference available. No authoritative reference available. Payables from subsidiaries included in the financial consolidation. No authoritative reference available. No authoritative reference available. No authoritative reference available. Derivative Instruments Net Asset Balance Acquired as a Result of XTO Merger No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cost Of Treasury Shares Issued For Acquisition No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Earnings per share computation. No authoritative reference available. Other foreign currency obligations No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share of Equity Company Income Taxes No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Taxes included in production and manufacturing expenses. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number Of Projects With Capitalized Well Exploration Completed As Of Year End Progressing Toward Development No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Income Including Equity Affiliate Earnings Before Income Taxes No authoritative reference available. Results Of Operations Income Before Consolidate and Equity Company Income Taxes No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Options Vested Ratably Number No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized Remaining No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Issued And Outstanding Restricted Stock. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Issued for XTO Merger No authoritative reference available. Schedule of excepted contribution pension benefits and other postretirement benefits. No authoritative reference available. Number Of Projects With Capitalized Well Drilled Greater Than Twelve Months As Of Year End No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash flow adjustment for the noncash net (gain) included in net income from sales of assets, including subsidiaries, cost and equity method investments and property, plant and equipment. Proceeds from asset sales are reported as an investing activity. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unrecognized Tax Benefits Foreign Exchange Effects Other No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unvested Converted Stock Options At Grant Date No authoritative reference available. Other Short Term Notes Payable Current No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Merger Related Granted And Converted Awards No authoritative reference available. Granted Restricted Stock Awards No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of change in fair value of level 3 assets that use significant unobservable inputs to measure fair value. No authoritative reference available. Segment Reporting Information Additions To Property Plant And Equipment No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Sales and other operating revenue from consolidated subsidiaries. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Gain Loss On Disposal Of Assets Net Of Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. Crude oil, products and merchandise. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Value Converted Company Performance Awards No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Inflation Rate For PP&E Fair Value Measurement No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Income Sales Based And Other Taxes Text Block No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of change in plan assets of pension and other postretirement benefits. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unvested Converted Stock Options At Period End No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Minimum Sublease Rental Income Noncancelable Operating Leases No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Vested At Stock Price Minimum No authoritative reference available. Share Exchange Ratio Acquisition No authoritative reference available. Grant value of restricted stock and units outstanding. No authoritative reference available. No authoritative reference available. No authoritative reference available. Award Vesting Period Range Minimum No authoritative reference available. Consolidated Affiliate Ownership Percentage No authoritative reference available. Converted performance stock awards. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Risk Adjusted Discount Rate For PP&E Fair Value Measurement No authoritative reference available. Assumed Initial Health Care Trend Rate No authoritative reference available. No authoritative reference available. No authoritative reference available. Percent of Awards Having Vesting Periods of One Year Granted to Senior Executives as Part of Merger No authoritative reference available. Unconditional Purchase Obligation Excludes Imputed Interest No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of condensed consolidated statement of income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Additional Details For Thirty Four Projects With Completed Exploratory Activity Progressing Toward Development No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Income tax reconciliation change in tax rate. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Investments, advances and long-term receivables No authoritative reference available. Additional Working Capital Information [TextBlock] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement by Share Based Payment Award Equity Instruments Other than Options Vested At Stock Price Maximum No authoritative reference available. No authoritative reference available. No authoritative reference available. Worldwide Deferred Income Tax Expense Benefit No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Second Open Tax Years By Major Tax Jurisdiction No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Merger Related Granted And Converted Awards In Period No authoritative reference available. Derivative Assets At Fair Value Net No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Supplemental Cash Flow Information No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Minimum Lease Commitments Noncancelable Operating Leases No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of summary of assets in excess of (less than) benefit obligation. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unconditional Purchase Obligation Due After One Year And Within Five Years No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Pension plans with an accumulated benefit obligation in excess of plan assets. No authoritative reference available. Percentage Increase In Unrecognized Tax Benefits No authoritative reference available. Derivative Liabilities At Fair Value Net No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Credit of net interest expense on income tax reserves. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Options Vested At Different Stock Prices Number No authoritative reference available. Carrying value of chemical products. No authoritative reference available. Deferred income taxes assets and liabilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Reserves for Long-term receivables and miscellaneous investments No authoritative reference available. Equity Method Investments Summary Income Statement And Balance Sheet No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Converted Restricted Stock Awards No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. MINIMUM OWNERSHIP OF AFFILIATE NEEDED FOR AWARDS No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Years Until First 50 Percent Of Awards Granted To Certain XTO Executives Vest No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying value of crude oil No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Other Comprehensive Income Loss Charge Credit To Equity Of Noncontrolling Interests No authoritative reference available. Schedule of income, sales based, and other taxes. No authoritative reference available. Revenues and earnings for acquired entity included in consolidated statements of income. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The adjustment out of other comprehensive income for prior service costs, actuarial gains and losses and other previously recorded other comprehensive income recognized as a component of net period benefit cost during the period, after tax. No authoritative reference available. Number of projects with suspended exploratory wells No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percent Of The Shares In Each Award Vesting After Seven Years No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Restricted stock and units outstanding. No authoritative reference available. Small Number Of Awards Granted To Senior Executives Vesting Period Range Longer Of Years Or Retirement No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangements By Share Based Payment Units Settled In Cash No authoritative reference available. Unconditional Purchase Obligation No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of fair value of pension benefit plan assets No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Period Over Which Stock Options Granted By XTO To Certain Senior Xto Employees Vest And Become Exercisable No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total estimated fair value calculated at acquisition for the converted XTO stock-based awards No authoritative reference available. Other Capitalized Exploratory Well Costs No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of fair value of other postretirement benefit plan assets No authoritative reference available. Excess Fair Value Over Cost Of Treasury Stock Issued Used In Acquisition No authoritative reference available. Years Until Second 50 Percent Of Awards Granted To Certain XTO Executives Vest Maximum No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan Amendments And Other Changes No authoritative reference available. No authoritative reference available. No authoritative reference available. Receivables from subsidiaries included in the financial consolidation. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share based compensation, option and incentive plans, policy [Text Block] No authoritative reference available. Equity Method Investments Income Tax Expense Benefit No authoritative reference available. Percent Of Awards Having Vesting Periods Of Two Or Three Year Granted To Senior Executives As Part Of Merger No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Issued for XTO Merger Shares No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Period Majority Of Converted XTO Awards Vest Over In Annual Installments Minimum No authoritative reference available. No authoritative reference available. No authoritative reference available. Income tax rate reconciliation, applied rate. No authoritative reference available. Unconditional Purchase Obligation Due After Fifth Year No authoritative reference available. The amount of acquisition cost of a business combination allocated to a liability for the accumulated projected benefit obligation in excess of plan assets for other postretirement benefits. No authoritative reference available. Other Comprehensive Income Defined Benefit Plans Amortized Gain Loss Arising During Period Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total Investments And Advances To Equity Method Companies No authoritative reference available. Years Wells Drilled No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Fair Values Used in Determining XTO Merger-Related Stock Based Awards Table No authoritative reference available. Total Number Of Projects No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Purchase cost of crude oil, products and other raw materials, feedstocks, semi finished products, finished products and other merchandise that become part of salable products for oil and gas, refining and marketing and chemical operations. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of unconditional purchase obligations. No authoritative reference available. Amortization Of Stock Based Awards No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of amounts recorded in balance sheet and accumulated other comprehensive income. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition Purchase Price Allocation Current Liabilities Accounts Payable And Accrued Liabilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total Federal And Non Us Tax Expense Benefit No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share based compensation arrangement by share based payment award restricted stock and units settled in stock. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of investments, advances and long-term receivables. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percentage Ownership Interest Of Overseas Project Before Nationalization Decree By Foreign Nation No authoritative reference available. Award Vesting Period Maximum No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business acquisition purchase price allocation, intangible assets. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Cash flow adjustment for pension and other postretirement benefits expense included in income in excess of / (less than) payments and contributions. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unrecognized tax benefits. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Common Stock Fair Market Value Price At Acquisition Date No authoritative reference available. No authoritative reference available. No authoritative reference available. Change In Benefit Obligation Of Pension And Other Postretirement Benefits No authoritative reference available. Total revenues and income from equity affiliates and other income. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Merger Related Granted And Converted Awards In Period Weighted Average Grant Date Fair Value Per Share No authoritative reference available. Fair Value Measurement With Unobservable Inputs Net Realized Gains Losses No authoritative reference available. Other Comprehensive Income Defined Benefit Plans Adjustment Net Of Tax Including Portion Attributable To Noncontrolling Interest No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Number Of Projects With Capitalized Well Drilled In Preceding Twelve Months Or Exploration Planned In Next Two Years As Of Year End No authoritative reference available. Business Acquisition Cost Of Acquired Entity Equity Interests Issued And Issuable Share Based Awards No authoritative reference available. Share of equity company sales revenues of consolidated companies sales revenues, as a percentage No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Period Majority Of Converted XTO Awards Vest Over In Annual Installments Maximum No authoritative reference available. Litigation and other contingencies disclosures, including guarantees, commitments and unconditional purchase obligations. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Prior Year Awards Issued Granted In Current Year No authoritative reference available. Schedule of income taxes charged credited directly to equity. No authoritative reference available. Range of volatility Maximum No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying value of petroleum products. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Carrying value of natural gas and other products No authoritative reference available. Property, Plant and Equipment and Asset Retirement Obligations [TextBlock] No authoritative reference available. Payables to equity companies. No authoritative reference available. Leased facilities. No authoritative reference available. U.S. Dollar equivalent of long-term debt at year-end exchange rates of amounts payable in foreign currencies. No authoritative reference available. The cash outflow from investing in cost and equity method investments, advancing money to equity method affiliates and from long-term receivables. No authoritative reference available. No authoritative reference available. No authoritative reference available. Capitalized Exploratory Well Costs Attributable To Equity Companies No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Portion Of Unused Lines Of Credit Facility Remaining Borrowing Capacity Commercial Paper Programs Under Negotiated Terms No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Years Until Second 50 Percent Of Awards Granted To Certain XTO Executives Vest Minimum No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Sales Based Tax Policy [Text Block] No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition Purchase Price Allocation Current Liabilities Income Taxes Payable No authoritative reference available. Range Of Risk-Free Interest Rates Minimum No authoritative reference available. Aggregate Intrinsic Value Of Stock Options Exercisable No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Present Value Unconditional Purchase Obligation No authoritative reference available. Total other taxes and duties. No authoritative reference available. No authoritative reference available. No authoritative reference available. Valdez Punitive Damages Net Of Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Range Of Volatility Minimum No authoritative reference available. No authoritative reference available. No authoritative reference available. Number Of Projects With Capitalized Well Drilled In Preceding Twelve Months No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of assumptions, components of benefit cost and amounts recorded in accumulated other comprehensive income for pension and other postretirement benefits No authoritative reference available. No authoritative reference available. No authoritative reference available. Range of risk-free interest rates Maximum No authoritative reference available. No authoritative reference available. No authoritative reference available. Other Taxes And Duties No authoritative reference available. No authoritative reference available. No authoritative reference available. Business Acquisition Purchase Price Allocation Current Liabilities Notes And Loans Payable No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of condensed consolidated statement of cash flows. No authoritative reference available. No authoritative reference available. No authoritative reference available. Advances To Equity Method Companies No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Financial Instruments and Derivatives No authoritative reference available. No authoritative reference available. No authoritative reference available. Other Comprehensive Income Loss Charge Credit To Investment In Equity Companies No authoritative reference available. Additional Financial Information Disclosure No authoritative reference available. Net proceeds/(payments) for financing activities with consolidated subsidiaries. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total income, sales-based and other taxes. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Percent of the shares in each award vesting after three years No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Other Increase Decrease No authoritative reference available. Awards Having Vesting Periods Of One Year Granted To Senior Executives As Part Of Merger No authoritative reference available. Tax years that remain, subject to examination by major tax jurisdiction. No authoritative reference available. Converted Performance Stock Awards, Shares No authoritative reference available. Share Based Compensation Arrangement By Share Based Payment Award Minimum Percentage Of Market Value At Date Of Grant No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Summary of stock options outstanding. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Summary of change in accumulated other comprehensive income table. No authoritative reference available. Describes an entity's accounting policy for determining the fair value of its assets and liabilities. No authoritative reference available. Business acquisition purchase price allocation, recognized assets acquired and liabilities assumed. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total revenue from sale of goods and services during the reporting period, reduced by sales returns and allowances, and sales discounts. Also includes sales-based taxes (e.g. excise and sales taxes) which are then deducted as sales-based tax expense. No authoritative reference available. No authoritative reference available. No authoritative reference available. Converted Performance Stock Awards No authoritative reference available. The cash inflow from the sale of subsidiaries, cost and equity method investments and property, plant and equipment. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Long-term debt in U.S. dollars. No authoritative reference available. Fair Value Measurement With Unobservable Inputs Net Unrealized Gains Losses No authoritative reference available. Total cash and cash equivalents No authoritative reference available. Weighted average risk-free interest rates No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Federal Income Tax Expense Benefit on Foreign Operations No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Small Number Of Awards Granted To Senior Executives Vesting Period Range Minimum No authoritative reference available. Shares Of Treasury Stock Issued For Acquisition No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Total Consolidated Company and Share of Equity Company Income Taxes No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Schedule of deferred income tax (assets) and liabilities by balance sheet classification. No authoritative reference available. Net cash inflow/(outflow) from noncontrolling interest including dividends paid and increase/decrease in number of shares held in the entity. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Undistributed Earnings From Subsidiary Companies Reinvested No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Unconditional Purchase Obligation Due Within One Year No authoritative reference available. No authoritative reference available. No authoritative reference available. Amount of sales-based taxes included in sales and other operating revenue. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Costs, excluding deprecation, incurred to operate and maintain - 1) oil and gas wells, production, transportation and support equipment and facilities; 2) refining manufacturing facilities; and 3) chemical manufacturing facilities. No authoritative reference available. No authoritative reference available. No authoritative reference available. Noncurrent amount of deferred income tax liabilities recorded in a business combination. No authoritative reference available. Interest Related Valdez Punitive Damages Net Of Tax No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Maximum Term In Years No authoritative reference available. Business acquisition purchase price allocation, current assets, materials and supplies. No authoritative reference available. No authoritative reference available. No authoritative reference available. Taxes Included in Selling General and Administrative Expenses No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. Defined Benefit Plan, Unfunded Plan No authoritative reference available. Net Rental Cost No authoritative reference available. No authoritative reference available. No authoritative reference available. Change in capitalized suspended exploratory well costs. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. The amount of increase or decrease in other comprehensive income attributed to foreign currency changes. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available. No authoritative reference available.