Oil and gas Oil and gas Oil And Gas Segment [Member] This member represents the oil and gas segment. Consolidated Entities [Axis] Consolidated Entities [Axis] Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] COSTS AND OTHER DEDUCTIONS Costs and Other Deductions [Abstract] Pay vs Performance Disclosure [Line Items] Accrued liabilities Accrued Liabilities, Current Statistical Measurement [Domain] Statistical Measurement [Domain] Arbitration filed by Andes Petroleum Ecuador Ltd Arbitration Demand Filed By Andes Petroleum Ecuador Ltd [Member] The arbitration demand filed by Andes Petroleum Ecuador Ltd. Changes in operating assets and liabilities: Increase (Decrease) in Operating Capital [Abstract] Underlying Security Market Price Change Underlying Security Market Price Change, Percent Face value (in dollars per share) Preferred Stock, Liquidation Preference Per Share 8.750% medium-term notes due 2023 Medium Term Notes 8.750 Percent Due 2023 [Member] Medium Term Notes 8.750 Percent Due 2023 [Member] All Award Types Award Type [Domain] Fair Value as of Grant Date Award Grant Date Fair Value Investment, Name [Domain] Investment, Name [Domain] Deferred Income Tax Charge Deferred Income Tax Charge [Member] Statement of Stockholders' Equity [Abstract] Statement of Stockholders' Equity [Abstract] Pension and postretirement gains, tax benefit (expense) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax Less: Preferred stock dividends and redemption premiums Less: Preferred stock dividends and redemption premiums Preferred dividend and redemption premiums Preferred Stock Dividends and Other Adjustments Deferred income taxes, net Deferred Income Tax Liabilities, Net MNPI Disclosure Timed for Compensation Value MNPI Disclosure Timed for Compensation Value [Flag] 3.000% senior notes due 2027 Senior Notes 3.000 Percent Due 2027 [Member] Senior Notes 3.000 Percent Due 2027 [Member] Segment Reporting [Abstract] Segment Reporting [Abstract] Accounts payable Accounts Payable, Current Restatement Determination Date: Restatement Determination Date [Axis] 7.200% debentures due 2029 Debentures 7.200 Percent Due 2029 [Member] Debentures 7.200 Percent Due 2029 [Member] Investment, Name [Axis] Investment, Name [Axis] Total Nonoperating Income (Expense) Insider Trading Policies and Procedures [Line Items] Rule 10b5-1 Arrangement Terminated Rule 10b5-1 Arrangement Terminated [Flag] Purchased commodities Purchased Commodities Purchased Commodities Disaggregation of revenue Disaggregation of Revenue [Line Items] Diamond Alkali Superfund Site - Operable Unit Four Diamond Alkali Superfund Site - Operable Unit Four [Member] Diamond Alkali Superfund Site - Operable Unit Four Restatement does not require Recovery Restatement Does Not Require Recovery [Text Block] Earnings Per Share and Stockholders' Equity Equity [Text Block] Proceeds from issuance of common stock Proceeds from Issuance of Common Stock Geographical [Axis] Geographical [Axis] Oil and gas operating expense Results of Operations, Expense from Oil and Gas Producing Activities Income Taxes Income Tax Disclosure [Text Block] PROPERTY, PLANT AND EQUIPMENT Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization [Abstract] Environmental Liabilities and Expenditures Environmental Loss Contingency Disclosure [Text Block] Ownership [Axis] Ownership [Axis] Period of expending first half of environmental reserves Period of Expending First Half of Environmental Reserves The number of future years over which the entity anticipates expenditures amounting to about half of the current environmental reserves. Gross property, plant and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, before Accumulated Depreciation and Amortization Long-term receivables and other assets, net Long Term Receivables And Other Assets Net [Member] Line item in the statement of financial position in which the fair value amounts of the derivative instruments are included. Restricted cash and restricted cash equivalents included in long-term receivables and other assets, net Restricted Cash Equivalents, Noncurrent CURRENT LIABILITIES Liabilities, Current [Abstract] Payments for repurchase of preferred stock and preference stock Payments for Repurchase of Preferred Stock and Preference Stock Federal Deferred Federal Income Tax Expense (Benefit) Aggregate fair value of derivative instruments with credit-risk-related contingent features, net receivable position Derivative, Net Receivable Position, Aggregate Fair Value Derivative, Net Receivable Position, Aggregate Fair Value Preferred stock, par value (in dollars per share) Preferred Stock, Par or Stated Value Per Share Preferred stock, at $1.00 per share par value: 2023 — 88,312 shares and 2022 —100,000 shares Preferred Stock, Value, Issued 6.600% senior notes due 2046 Senior Notes 6.600 Percent Due 2046 [Member] Senior Notes 6.600 Percent Due 2046 [Member] Eliminations Intersegment Eliminations [Member] Subsequent Event Type [Domain] Subsequent Event Type [Domain] Exercise of warrants and options (in shares) Warrants And Stock Options, Exercises In Period Warrants And Stock Options, Exercises In Period Environmental remediation additional loss range Environmental Remediation Possible Additional Loss Beyond Accruals This element represents the reasonably possible additional loss that may be incurred beyond the recorded liabilities for environmental remediation. Derivative Instruments, Gain (Loss) [Line Items] Derivative Instruments, Gain (Loss) [Line Items] Environmental loss contingency, statement of financial position Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration] Net income attributable to common stockholders per share—diluted (in dollars per share) Diluted income per common share (in dollars per share) Earnings Per Share, Diluted Commodity contract derivative liability, gross Derivative Liability, Subject to Master Netting Arrangement, before Offset PEO Total Compensation Amount PEO Total Compensation Amount Trade receivables, net of reserves of $24 in 2023 and $37 in 2022 Accounts receivable, after allowance for credit loss, current Accounts Receivable, after Allowance for Credit Loss, Current Other Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax Oil commodity contracts Crude Oil and Natural Gas Liquids (NGL) [Member] Trading Arrangements, by Individual Trading Arrangements, by Individual [Table] Level 3 Fair Value, Inputs, Level 3 [Member] Treasury stock (in shares) Treasury Stock, Common, Shares Interest and debt expense, net Interest and Debt Expense 3.500% senior notes due 2029 Senior Notes 3.500 Percent Due 2029 [Member] Senior Notes 3.500 Percent Due 2029 [Member] 3.200% senior notes due 2026 Senior Notes 3.200 Percent Due 2026 [Member] Senior Notes 3.200 Percent Due 2026 [Member] OTHER ITEMS Other Nonoperating Income (Expense) [Abstract] Litigation Case [Axis] Litigation Case [Axis] Options exercised Stock Issued During Period, Value, Stock Options Exercised Trading Symbol Trading Symbol Preferred stock, liquidation preference, par value percentage Preferred Stock, Liquidation Preference, Par Value Percentage Preferred Stock, Liquidation Preference, Par Value Percentage Non-PEO NEO Average Compensation Actually Paid Amount Non-PEO NEO Average Compensation Actually Paid Amount Fair value of long-term debt Long-Term Debt, Fair Value NET INCOME Net income Net income Net Income (Loss) Weighted average sales price (in dollars per barrel) Oil and Gas, Average Sale Price Total current liabilities Liabilities, Current Number of parties notified to pay the cost Number Of Parties Notified To Pay The Cost Number Of Parties Notified To Pay The Cost Derivative Contract [Domain] Derivative Contract [Domain] Changed Peer Group, Footnote Changed Peer Group, Footnote [Text Block] Company Selected Measure Name Company Selected Measure Name 7.875% senior notes due 2031 Senior Notes 7.875 Percent Due 2031 [Member] Senior Notes 7.875 Percent Due 2031 [Member] Schedule of Cash and Cash Equivalents Schedule of Cash and Cash Equivalents [Table Text Block] Net property, plant and equipment Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, after Accumulated Depreciation and Amortization Total Revenues, Operating and Nonoperating The sum of operating revenues and nonoperating revenues. Operating revenues are the aggregate revenue recognized during the period derived from goods sold, services rendered, or other activities that constitute an entity's earning process. Nonoperating revenues are the aggregate revenue recognized during the period derived from ancillary business-related activities that are not considered part of the normal operations of the business. LIABILITIES AND EQUITY Liabilities and Equity [Abstract] Preferred dividends Redeemable Preferred Stock Dividends Derivative Instruments, Gain (Loss) [Table] Derivative Instruments, Gain (Loss) [Table] STOCKHOLDERS' EQUITY Equity, Attributable to Parent [Abstract] Total deferred credits and other liabilities Deferred Credits and Other Liabilities, Noncurrent (Increase) decrease in receivables Increase (Decrease) in Receivables NET INCOME ATTRIBUTABLE TO COMMON STOCKHOLDERS Net Income (Loss) Attributable to Common Stockholders Net Income (Loss) Attributable to Common Stockholders Outstanding net volumes on derivatives not designated as hedges (mmbls/bcf) Derivative, Nonmonetary Notional Amount, Volume 7.250% debentures due 2096 Debentures 7.250 Percent Due 2096 [Member] Debentures 7.250 Percent Due 2096 [Member] 8.500% senior notes due 2027 Senior Notes 8.500 Percent Due 2027 [Member] Senior Notes 8.500 Percent Due 2027 Total Inventory, Gross Schedule of Calculation of Basic and Diluted EPS Schedule of Earnings Per Share, Basic and Diluted [Table Text Block] Chemical and midstream cost of sales Cost of Goods and Services Sold Executive Category: Executive Category [Axis] Level 1 Fair Value, Inputs, Level 1 [Member] Name Measure Name Name Forgone Recovery, Individual Name 4.300% senior notes due 2039 Senior Notes 4.300 Percent Due 2039 [Member] Senior Notes 4.300 Percent Due 2039 [Member] Shareholder warrants exercised Adjustments to Additional Paid in Capital, Warrant Issued 4.400% senior notes due 2046 Senior Notes 4.400 Percent Due 2046 [Member] Senior Notes 4.400 Percent Due 2046 [Member] Equity Components [Axis] Equity Components [Axis] Exercise price of warrant (in dollars per share) Class of Warrant or Right, Exercise Price of Warrants or Rights Additional 402(v) Disclosure Additional 402(v) Disclosure [Text Block] Potential accrued interest Loss Contingency, Potential Income Tax Expense (Benefit), Accrued Interest Loss Contingency, Potential Income Tax Expense (Benefit), Accrued Interest Revaluation to LIFO Inventory, LIFO Reserve Measurement Basis [Axis] Measurement Basis [Axis] Underlying Securities Award Underlying Securities Amount Entity Small Business Entity Small Business Components of Preferred Stock Dividends and Redemptions Components Of Preferred Stock Dividends And Redemptions [Table Text Block] Components Of Preferred Stock Dividends And Redemptions Local Phone Number Local Phone Number Fair Value Measurement [Domain] Fair Value Measurement [Domain] Recovery of Erroneously Awarded Compensation Disclosure [Line Items] Forecast Forecast [Member] Subsidiaries Subsidiaries [Member] Marketing Derivatives Marketing Derivatives [Member] Marketing Derivatives [Member] Dividends on common stock (in dollars per share) Common Stock, Dividends, Per Share, Declared Deferred credits and other liabilities - other Deferred Credits And Other Liabilities [Member] Line item in the statement of financial position in which the fair value amounts of the derivative instruments are included. Draws on receivables securitization facility Proceeds from Accounts Receivable Securitization Warrant Warrant [Member] Operating lease liabilities Operating Lease, Liability, Noncurrent Strike Price One Strike Price One [Member] Strike Price One Forgone Recovery due to Violation of Home Country Law, Amount Forgone Recovery due to Violation of Home Country Law, Amount Accrued liabilities Accrued Liabilities [Member] Debt Instrument, Name [Domain] Debt Instrument, Name [Domain] Alden Leeds Alden Leeds [Member] Alden Leeds Portion at Fair Value Measurement Portion at Fair Value Measurement [Member] Income Statement Location [Axis] Income Statement Location [Axis] Schedule of Long-term Debt Schedule of Long-Term Debt Instruments [Table Text Block] Environmental reserves, range between zero to $ one million site category Environmental Reserves Range Between Zero to One Million Threshold Value Site Category This item represents the reserve, in which a site's reserve must range between zero and one million. Pension and postretirement obligations Liability, Defined Benefit Plan, Noncurrent Collateral paid netted against derivative liabilities Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Offset Site Contingency [Table] Site Contingency [Table] Dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted, Adjustment Limited partner interest Limited Liability Company LLC Or Limited Partnership LP Limited Partner Unit Ownership Interest Limited Liability Company LLC Or Limited Partnership LP Limited Partner Unit Ownership Interest Potential cash tax Loss Contingency, Potential Income Tax Expense (Benefit) Loss Contingency, Potential Income Tax Expense (Benefit) Net sales Net sales Revenues Products and Services [Domain] Product and Service [Domain] Other Performance Measure, Amount Other Performance Measure, Amount Diamond Alkali Superfund Site - Operable Unit Two Diamond Alkali Superfund Site - Operable Unit Two [Member] Diamond Alkali Superfund Site - Operable Unit Two Aggregate Available Trading Arrangement, Securities Aggregate Available Amount (Increase) decrease in inventories Increase (Decrease) in Inventories CASH FLOW FROM INVESTING ACTIVITIES Net Cash Provided by (Used in) Investing Activities [Abstract] Insider Trading Policies and Procedures Not Adopted Insider Trading Policies and Procedures Not Adopted [Text Block] Anadarko acquisition-related costs Business Combination, Acquisition Related Costs Award Type Award Type [Axis] Berkshire warrants, common stock warrants, and options excluded from diluted shares (in shares) Antidilutive Securities Excluded from Computation of Earnings Per Share, Amount Derivative Instruments and Hedging Activities Disclosure [Abstract] Derivative Instruments and Hedging Activities Disclosure [Abstract] Document Quarterly Report Document Quarterly Report Collateral received netted against derivative assets Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset Gain on debt extinguished Gain (Loss) on Extinguishment of Debt Site contingency, number of operating units Site Contingency, Number Of Operating Units Site Contingency, Number Of Operating Units Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] Hedging Designation [Axis] Hedging Designation [Axis] Stockholders' Equity Note [Abstract] Stockholders' Equity Note [Abstract] Trading Arrangement: Trading Arrangement [Axis] Schedule of Obligated Preferred Stock Redemptions Schedule Of Obligated Preferred Stock Redemptions [Table Text Block] Schedule Of Obligated Preferred Stock Redemptions PEO Actually Paid Compensation Amount PEO Actually Paid Compensation Amount Gross and net fair values of outstanding derivatives Derivatives, Fair Value [Line Items] Schedule of Components of Income Tax Expense (Benefit) Schedule of Components of Income Tax Expense (Benefit) [Table Text Block] Long-term Debt, Type [Domain] Long-Term Debt, Type [Domain] Entity File Number Entity File Number Debentures Debentures [Member] Debentures [Member] Current operating lease liabilities Operating Lease, Liability, Current Environmental Remediation Obligations [Abstract] Environmental Remediation Obligations [Abstract] Preferred stock, value, outstanding Preferred Stock, Value, Outstanding Entity Shell Company Entity Shell Company Business Acquisition, Acquiree [Domain] Business Acquisition, Acquiree [Domain] Restatement Determination Date Restatement Determination Date All other revenues Revenue Not from Contract with Customer 5.550% senior notes due 2026 Senior Notes 5.550 Percent Due 2026 [Member] Senior Notes 5.550 Percent Due 2026 Increase in current domestic and foreign income taxes Increase (Decrease) in Income Taxes Payable Environmental reserves, exceeding $ ten million, threshold value Environmental Reserves Exceeding Ten Million Threshold Value, Site Category This item represents the amount which a site's reserve must exceed, which is ten million. Rule 10b5-1 Arrangement Adopted Rule 10b5-1 Arrangement Adopted [Flag] Cash, cash equivalents, restricted cash and restricted cash equivalents — beginning of period Cash, cash equivalents, restricted cash and restricted cash equivalents — end of period Cash, cash equivalents, restricted cash and restricted cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents Less: Net income allocated to participating securities Undistributed Earnings (Loss) Allocated to Participating Securities, Diluted Stock Price or TSR Estimation Method Stock Price or TSR Estimation Method [Text Block] Common stock, issued (in shares) Common Stock, Shares, Issued Stretch of lower passaic river requiring remedial actions River Stretch Which Require Remedial Actions Represents the stretch of river which require remedial actions. Current maturities of long-term debt Long-Term Debt and Lease Obligation, Current Treasury stock: 2023 — 218,398,379 shares and 2022 — 198,653,682 shares Treasury Stock, Common, Value Security Exchange Name Security Exchange Name Preferred stock redemption - face value Shares of preferred stock were redeemed Stock Redeemed or Called During Period, Value Net book value of debt Long-Term Debt 6.125% senior notes due 2031 Senior Notes 6.125 Percent Due 2031 [Member] Senior Notes 6.125 Percent Due 2031 Selling, general and administrative expenses Selling, General and Administrative Expense Accumulated other comprehensive income Accumulated Other Comprehensive Income (Loss), Net of Tax Employee Stock Option Employee Stock Option [Member] Derivatives Derivative Instruments and Hedging Activities Disclosure [Text Block] Cash dividends paid on common and preferred stock Payments of Ordinary Dividends Other financing, net Proceeds from (Payments for) Other Financing Activities High end of range Maximum [Member] Comprehensive income attributable to preferred and common stockholders Comprehensive Income (Loss), Net of Tax, Attributable to Parent Document Type Document Type Tabular List, Table Tabular List [Table Text Block] Federal Domestic Tax Authority [Member] Equity investments and other, net Payments for (Proceeds from) Equity Investments and Other, Net Payments for (Proceeds from) Equity Investments and Other, Net Entity Address, Address Line One Entity Address, Address Line One Purchases of treasury stock Treasury Stock, Value, Acquired, Cost Method Entity Address, Address Line Two Entity Address, Address Line Two Federal Current Federal Tax Expense (Benefit) 6.375% senior notes due 2028 Senior Notes 6.375 Percent Due 2028 [Member] Senior Notes 6.375 Percent Due 2028 7.500% senior notes due 2031 Senior Notes 7.500 Percent Due 2031 [Member] Senior Notes 7.500 Percent Due 2031 [Member] Noncash charges to income and other Other Noncash Income (Expense) Natural gas commodity contracts Natural Gas Per Cubic Foot [Member] Information pertaining to commodity derivative contracts for the natural gas. Payments of preferred stock dividends Payments of Ordinary Dividends, Preferred Stock and Preference Stock Business Acquisition [Axis] Business Acquisition [Axis] Closed or Non-Operated Sites Closed Or Non Operated Entity Sites [Member] This element indicates sites not listed or proposed for listing by the U.S. Environmental Protection Agency on the CERCLA National Priorities List (NPL), which have been closed or are not otherwise currently operated by the entity. 7.500% debentures due 2096 Debentures 7.500 Percent Due 2096 [Member] Debentures 7.500 Percent Due 2096 [Member] Summary of Significant Accounting Policies [Table] Summary of Significant Accounting Policies [Table] The table describes the detailed summary of significant accounting policies. Trade receivables, reserves Accounts Receivable, Allowance for Credit Loss, Current Subsequent Event Subsequent Event [Member] Exploration expense Exploration Expense Preferred stock redemption value in excess of carrying value Increase in Carrying Amount of Redeemable Preferred Stock Derivative [Table] Derivative [Table] State and Local Deferred State and Local Income Tax Expense (Benefit) Increase (decrease) in accounts payable and accrued liabilities Increase (Decrease) in Accounts Payable and Accrued Liabilities Statement of Operations Data Income Statement [Abstract] Long-term Purchase Commitment [Table] Long-Term Purchase Commitment [Table] Title of 12(b) Security Title of 12(b) Security Amount awarded from other party in litigation Litigation Settlement, Amount Awarded from Other Party Insider Trading Policies and Procedures Adopted Insider Trading Policies and Procedures Adopted [Flag] Total net fair value, liability Derivative Liability Aggregate Erroneous Compensation Not Yet Determined Aggregate Erroneous Compensation Not Yet Determined [Text Block] 4.200% senior notes due 2048 Senior Notes 4.200 Percent Due 2048 [Member] Senior Notes 4.200 Percent Due 2048 [Member] Operating segments Operating Segments [Member] Number of Sites Environmental Remediation Sites Number Represents the number of remediation sites of the entity, as aggregated by type of environmental remediation site. Other current assets Other Assets, Current Class of Stock [Line Items] Class of Stock [Line Items] Income Tax Disclosure [Abstract] Mark to market gain (loss) on interest rate swaps Gain (Loss) on Interest Rate Derivative Instruments Not Designated as Hedging Instruments Forgone Recovery due to Expense of Enforcement, Amount Forgone Recovery due to Expense of Enforcement, Amount Litigation settlement interest Litigation Settlement Interest Face value per share (in dollars per share) Stock Issued During Period, Value Per Share, Acquisitions Stock Issued During Period, Value Per Share, Acquisitions Entity Tax Identification Number Entity Tax Identification Number INVESTMENTS IN UNCONSOLIDATED ENTITIES Equity Method Investments Inventories Total Inventory, Net Preferred stock accrual rate per annum on unpaid amounts Preferred Stock, Dividend Rate For Unpaid Amounts, Percentage Preferred Stock, Dividend Rate For Unpaid Amounts, Percentage Statistical Measurement [Axis] Statistical Measurement [Axis] Land Land [Member] (Increase) decrease in other current assets Increase (Decrease) in Other Current Assets Balance Sheet Location [Domain] Balance Sheet Location [Domain] Entity Interactive Data Current Entity Interactive Data Current Disaggregation of Revenue [Table] Disaggregation of Revenue [Table] Long-Term Debt Long-Term Debt [Text Block] Aggregate fair value of derivative instruments with credit-risk-related contingent features for which a net liability position existed (net of collateral) Derivative, Net Liability Position, Aggregate Fair Value 2.900% senior notes due 2024 Senior Notes 2.900 Percent Due 2024 [Member] Senior Notes 2.900 Percent Due 2024 [Member] Non-voting limited partner interest Limited Liability Company LLC Or Limited Partnership LP Non Voting Limited Partner Unit Interest Percentage Limited Liability Company LLC Or Limited Partnership LP Non Voting Limited Partner Unit Interest Percentage Environmental remediation costs, released Environmental Remediation Costs, Released Environmental Remediation Costs, Released Percent of reserve to be funded over the next three to four years Percent Of Environmental Reserves To Be Funded In Three To Four Years Percent of environmental reserves to be funded by the entity in the next three to four years. 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] Total Shareholder Return Amount Total Shareholder Return Amount Purchases of treasury stock Payments for Repurchase of Common Stock Entity Common Stock, Shares Outstanding Entity Common Stock, Shares Outstanding Adjustment To PEO Compensation, Footnote Adjustment To PEO Compensation, Footnote [Text Block] Foreign Deferred Foreign Income Tax Expense (Benefit) Inventory Disclosure [Abstract] Inventory Disclosure [Abstract] Segments [Domain] Segments [Domain] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] 4.400% senior notes due 2049 Senior Notes 4.400 Percent Due 2049 [Member] Senior Notes 4.400 Percent Due 2049 [Member] Consolidation Items [Domain] Consolidation Items [Domain] Retained earnings Retained Earnings (Accumulated Deficit) Measure: Measure [Axis] Gains related to legal settlements Gain (Loss) Related to Litigation Settlement Commitments and Contingencies Disclosure [Abstract] Commitments and Contingencies Disclosure [Abstract] Name Outstanding Recovery, Individual Name Revenue Revenue from Contract with Customer [Policy Text Block] Entity Incorporation, State or Country Code Entity Incorporation, State or Country Code CURRENT ASSETS Assets, Current [Abstract] Entity Address, State or Province Entity Address, State or Province Compensation Actually Paid vs. Total Shareholder Return Compensation Actually Paid vs. Total Shareholder Return [Text Block] Short position Short [Member] Netting and collateral, liability Derivative Liability, Fair Value, Gross Asset and Right to Reclaim Cash, Offset CASH FLOW FROM OPERATING ACTIVITIES Net Cash Provided by (Used in) Operating Activities [Abstract] Class of Warrant or Right [Domain] Class of Warrant or Right [Domain] Common stock, outstanding (in shares) Common Stock, Shares, Outstanding Asset impairments and other charges Pretax Asset Impairment and Related Items The pre-tax charge against earnings resulting from the write down of long lived assets due to the difference between the carrying value and lower fair value, and related items. Disposal Group Name [Domain] Disposal Group Name [Domain] PER COMMON SHARE Basic earnings (loss) per common share Earnings Per Share, Basic [Abstract] Preferred stock redeemed, including premium Stock Redeemed Or Called During Period, Including Premium, Value Stock Redeemed Or Called During Period, Including Premium, Value Gains on interest rate swaps, net Gain (loss) on derivative instrument Gain (Loss) on Derivative Instruments, Net, Pretax PEO PEO [Member] 3.500% senior notes due 2025 Senior Notes 3.500 Percent Due 2025 [Member] Senior Notes 3.500 Percent Due 2025 [Member] Environmental Remediation Site [Domain] Environmental Remediation Site [Domain] Other operating and non-operating expense Other Cost and Expense, Operating Environmental reserves, range between zero to $ one million site category, number of sites Environmental Reserves Range Between Zero to One Million Site Category, Number of Sites This item represents the number of sites with each site's reserves in between zero to one million. Less: current maturities of long-term debt Long-term Debt, Current Maturities Excluding Finance Leases Long-term Debt, Current Maturities Excluding Finance Leases Commodity contract derivative asset, gross Derivative Asset, Subject to Master Netting Arrangement, before Offset Common stock, par value (in dollars per share) Common Stock, Par or Stated Value Per Share 7.200% senior debentures due 2028 Senior Debentures 7.200 Percent Due 2028 [Member] Senior Debentures 7.200 Percent Due 2028 [Member] Net cash used by investing activities Net Cash Provided by (Used in) Investing Activities Class of Stock [Domain] Class of Stock [Domain] Own economic interest (as a percent) Percentage of Own Economic Interest The percentage of economic interest owned. Net income, net of participating securities Net Income (Loss) Available to Common Stockholders, Basic Schedule of Inventories Schedule of Inventory, Current [Table Text Block] Interest Rate Swaps Interest Rate Swap [Member] Debt Instrument [Axis] Debt Instrument [Axis] Outstanding Aggregate Erroneous Compensation Amount Outstanding Aggregate Erroneous Compensation Amount Worldwide effective tax rate Effective Income Tax Rate Reconciliation, Percent Total current tax expense Current Income Tax Expense (Benefit) DEFERRED CREDITS AND OTHER LIABILITIES Deferred Credits and Other Liabilities [Abstract] Total Shareholder Return Vs Peer Group Total Shareholder Return Vs Peer Group [Text Block] Environmental Remediation Site [Axis] Environmental Remediation Site [Axis] Accumulated Other Comprehensive Income (Loss) AOCI Attributable to Parent [Member] Aggregate Erroneous Compensation Amount Aggregate Erroneous Compensation Amount All Executive Categories All Executive Categories [Member] Dividends on preferred stock (in dollars per share) Preferred Stock, Dividends Per Share, Declared Non-Rule 10b5-1 Arrangement Adopted Non-Rule 10b5-1 Arrangement Adopted [Flag] Midstream and marketing Midstream And Marketing [Member] Represents company's midstream and marketing segment, used for segment reporting purposes. Debt Disclosure [Abstract] Debt Disclosure [Abstract] Property, Plant and Equipment, Type [Domain] Long-Lived Tangible Asset [Domain] Disposed of by sale, not discontinued operations Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] Environmental remediation reserves Site Contingency [Line Items] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Fair Values Derivatives, Balance Sheet Location, by Derivative Contract Type [Table] Regulatory Asset [Domain] Regulatory Asset [Domain] Common stock, at $0.20 per share par value, authorized shares: 1.5 billion, issued shares: 2023 — 1,103,080,267 shares and 2022 — 1,098,512,626 shares Common Stock, Value, Issued Proceeds from sales of assets, net Proceeds From Sale Of Assets And Equity Method Investments, Net Proceeds From Sale Of Assets And Equity Method Investments, Net Awards Close in Time to MNPI Disclosures, Table Awards Close in Time to MNPI Disclosures [Table Text Block] State and Local Current State and Local Tax Expense (Benefit) Senior Notes Senior Notes [Member] Total current assets Assets, Current Preferred Stock Preferred Stock [Member] Deferred Deferred Income Tax Expense (Benefit), Continuing Operations [Abstract] 7.950% debentures due 2029 Debentures 7.950 Percent Due 2029 [Member] Debentures 7.950 Percent Due 2029 [Member] Variable Rate Bonds Variable Rate Bonds [Member] Variable Rate Bonds [Member] Summary of Significant Accounting Policies [Line Items] Summary of Significant Accounting Policies [Line Items] These concepts are used to disclose supplemental cash flow information. Impairment and related charges Asset Impairment Charges 6.625% senior notes due 2030 Senior Notes 6.625 Percent Due 2030 [Member] Senior Notes 6.625 Percent Due 2030 Revenue from Contract with Customer [Abstract] Revenue from Contract with Customer [Abstract] All Individuals All Individuals [Member] SUPPLEMENTAL CASH FLOW INFORMATION Supplemental Cash Flow Information [Abstract] Litigation Case [Domain] Litigation Case [Domain] Entity Filer Category Entity Filer Category Permian Basin Permian Basin [Member] Permian Basin Non-PEO NEO Average Total Compensation Amount Non-PEO NEO Average Total Compensation Amount Statement [Table] Statement [Table] Current Fiscal Year End Date Current Fiscal Year End Date Stock repurchased during period, value Stock Repurchase Program, Authorized Amount Total debt and finance leases Long-Term Debt and Lease Obligation, Including Current Maturities Income Tax Authority [Axis] Income Tax Authority [Axis] PEO Name PEO Name Outstanding warrants (in shares) Class of Warrant or Right, Outstanding Current Current Income Tax Expense (Benefit), Continuing Operations [Abstract] Preferred stock, outstanding (in shares) Preferred stock, beginning balance (in shares) Preferred stock, ending balance (in shares) Preferred Stock, Shares Outstanding 5.500% senior notes due 2025 Senior Notes 5.500 Percent Due 2025 [Member] Senior Notes 5.550 Percent Due 2026 [Member] 6.200% senior notes due 2040 Senior Notes 6.200 Percent Due 2040 [Member] Senior Notes 6.200 Percent Due 2040 [Member] Net cash provided by operating activities Net Cash Provided by (Used in) Operating Activities Class of Stock [Axis] Class of Stock [Axis] Entities [Table] Entities [Table] Zero Coupon senior notes due 2036 Zero Coupon Senior Notes Due 2036 [Member] Zero Coupon Senior Notes Due 2036 [Member] Erroneously Awarded Compensation Recovery Erroneously Awarded Compensation Recovery [Table] Corporate Corporate, Non-Segment [Member] Depreciation, depletion and amortization Depreciation, depletion and amortization of assets Depreciation, Depletion and Amortization Amount awarded to other party in litigation Litigation Settlement, Amount Awarded to Other Party Debt instrument interest rate stated percentage Interest rate Debt Instrument, Interest Rate, Stated Percentage Award Timing, How MNPI Considered Award Timing, How MNPI Considered [Text Block] Medium-term Notes Medium-term Notes [Member] 3.400% senior notes due 2026 Senior Notes 3.400 Percent Due 2026 [Member] Senior Notes 3.400 Percent Due 2026 [Member] Balance Sheet Data Statement of Financial Position [Abstract] Entity Information [Line Items] Entity Information [Line Items] Total stockholders' equity Beginning balance Ending balance Equity, Attributable to Parent Consolidation Items [Axis] Consolidation Items [Axis] Variable rate bonds due 2030 (5.920% and 5.320% as of June 30, 2023 and December 31, 2022, respectively) Variable Rate Bonds Due 2030 [Member] Variable Rate Bonds Due 2030 [Member] Restricted cash and restricted cash equivalents included in other current assets Restricted Cash and Cash Equivalents Schedule of Stock by Class [Table] Schedule of Stock by Class [Table] Income before income taxes Income before income taxes Income (loss) before income taxes Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest Long-term debt, net Long-Term Debt and Lease Obligation Not Designated as Hedging Instruments Not Designated as Hedging Instrument [Member] Asset impairments and other charges Non-Cash Portion Of Asset Impairment And Related Items Non-cash portion of asset impairment and related Items. Property, Plant and Equipment, Type [Axis] Long-Lived Tangible Asset [Axis] Hedging Designation [Domain] Hedging Designation [Domain] Level 2 Fair Value, Inputs, Level 2 [Member] Entity Emerging Growth Company Entity Emerging Growth Company Non-National Priorities List Sites Non-National Priorities List Sites [Member] Non-National Priorities List Sites Debt issuance costs Debt Issuance Costs, Net Less: current maturities of financing leases Finance Lease, Liability, Current Maturities Finance Lease, Liability, Current Maturities 6.450% senior notes due 2036 Senior Notes 6.450 Percent Due 2036 [Member] Senior Notes 6.450 Percent Due 2036 [Member] 6.625% debentures due 2028 Debentures 6.625 Percent Due 2028 [Member] Debentures 6.625 Percent Due 2028 [Member] Materials and supplies Other Inventory, Supplies, Gross Commodity inventory and finished goods Inventory, Finished Goods, Gross Disposal Group Classification [Domain] Disposal Group Classification [Domain] Tronox Settlement Tronox Settlement [Member] Tronox Settlement Debt instrument, variable rate Debt Instrument, Interest Rate, Effective Percentage Schedule of Gains and Losses on Derivatives Derivative Instruments, Gain (Loss) [Table Text Block] Increase (Decrease) in Stockholders' Equity [Roll Forward] Increase (Decrease) in Stockholders' Equity [Roll Forward] Named Executive Officers, Footnote Named Executive Officers, Footnote [Text Block] Change in capital accrual Increase (Decrease) In Capital Accrual Increase (Decrease) In Capital Accrual Black Butte Coal Black Butte Coal Company [Member] Black Butte Coal Company Document Fiscal Period Focus Document Fiscal Period Focus Pay vs Performance Disclosure, Table Pay vs Performance [Table Text Block] Title Trading Arrangement, Individual Title Current portion of environmental remediation liabilities Accrued Environmental Loss Contingencies, Current Position [Domain] Position [Domain] Common Stock, $0.20 par value Common Stock Common Stock [Member] Income tax refunds received Tentative cash tax refund Proceeds from Income Tax Refunds Individual: Individual [Axis] City Area Code City Area Code Entity Address, Postal Zip Code Entity Address, Postal Zip Code Product and Service [Axis] Product and Service [Axis] Income Statement Location [Domain] Income Statement Location [Domain] Unamortized premium, net Debt Instrument, Unamortized Discount (Premium), Net Document Fiscal Year Focus Document Fiscal Year Focus Geographical [Domain] Geographical [Domain] Payment of receivables securitization facility Repayments of Accounts Receivable Securitization Gains on derivatives, tax expense Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, Tax Low end of range Minimum [Member] Proceeds from settlement Proceeds from Legal Settlements General Organization, Consolidation, Basis of Presentation, Business Description and Accounting Policies [Text Block] 8.450% senior notes due 2029 Senior Notes 8.450 Percent Due 2029 [Member] Senior Debentures 8.450 Percent Due 2029 [Member] Schedule of of Net Sales Related to the Outstanding Commodity Derivative Instruments Schedule of Derivative Instruments Included in Trading Activities [Table Text Block] Exercise Price Award Exercise Price Strike Price Two Strike Price Two [Member] Strike Price Two 8.875% senior notes due 2030 Senior Notes 8.875 Percent Due 2030 [Member] Senior Notes 8.875 Percent Due 2030 Schedule of Current and Non-Current Environmental Remediation Reserves by Categories of Sites Schedule of Environmental Loss Contingencies by Site [Table Text Block] Other comprehensive income (losses), net of tax Other Comprehensive Income (Loss), Net of Tax Disposal Group Classification [Axis] Disposal Group Classification [Axis] Statement of Cash Flows Data Statement of Cash Flows [Abstract] Dividends on common stock Dividends, Common Stock, Cash ASSETS Assets [Abstract] Award Timing MNPI Disclosure Award Timing MNPI Disclosure [Text Block] Schedule of 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Ownership [Domain] Ownership [Domain] WES WES Midstream segment Western Midstream Partners LP [Member] Western Midstream Partners LP [Member] Net income attributable to common stockholders—basic (in dollars per share) Basic income per common share (in dollars per share) Earnings Per Share, Basic OPERATING LEASE ASSETS Operating Lease, Right-of-Use Asset Schedule of Long-term Debt Instruments [Table] Schedule of Long-Term Debt Instruments [Table] Accounting Policies [Abstract] Accounting Policies [Abstract] Equity Valuation Assumption Difference, Footnote Equity Valuation Assumption Difference, Footnote [Text Block] Gains on sales of assets, net Gain (Loss) on Disposition of Assets Erroneous Compensation Analysis Erroneous Compensation Analysis [Text Block] Deferred tax charges Deferred Tax Charges, Contract Renewal Deferred Tax Charges, Contract Renewal Foreign Current Foreign Tax Expense (Benefit) Net income, net of participating securities Net Income (Loss) Available to Common 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Schedule of Industry Segments Schedule of Segment Reporting Information, by Segment [Table Text Block] Chemical Chemical Chemical Segment [Member] This member represents the chemical segment. Purchases of businesses and assets, net Payments for Purchases of Assets and Businesses Aggregate net cash payments for a combination of transactions of purchases of assets and businesses. Netting, asset Derivative Asset, Fair Value, Gross Liability and Obligation to Return Cash, Offset Document Transition Report Document Transition Report Award Timing Predetermined Award Timing Predetermined [Flag] Termination Date Trading Arrangement Termination Date Total Costs and Other Deductions Total costs of sales, operating expenses, and nonoperating expenses for the period. 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Dividend income represents a distribution of earnings to shareholders by investee companies. Raw materials Inventory, Raw Materials, Gross 4.100% senior notes due 2047 Senior Notes 4.100 Percent Due 2047 [Member] Senior Notes 4.100 Percent Due 2047 [Member] Derivative Instrument [Axis] Derivative Instrument [Axis] Environmental remediation expense Environmental Remediation Expense, before Recovery Long-term debt, gross Long-Term Debt, Gross All Trading Arrangements All Trading Arrangements [Member] Accumulated depreciation, depletion and amortization Property, Plant, and Equipment and Finance Lease Right-of-Use Asset, Accumulated Depreciation and Amortization All Adjustments to Compensation All Adjustments to Compensation [Member] Outstanding commodity derivatives contracts not designated as hedging instruments Derivative [Line Items] Derivative [Line Items] 4.625% senior notes due 2045 Senior Notes 4.625 Percent Due 2045 [Member] Senior Notes 4.625 Percent Due 2045 [Member] Award Timing Disclosures [Line Items] Cash Equivalents and Restricted Cash Equivalents Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block] Less: Obligated redemptions (in shares) Preferred Stock, Shares, Obligated Redemptions Preferred Stock, Shares, Obligated Redemptions Period of expending remaining environmental reserves (or more) Period of Expending Remaining Environmental Reserves Period of Expending Remaining Environmental Reserves Compensation Amount Outstanding Recovery Compensation Amount NPL Sites National Priorities List Sites [Member] This element indicates sites listed or proposed for listing by the U.S. Environmental Protection Agency on the CERCLA National Priorities List (NPL). Additional paid-in capital Additional Paid in Capital Other comprehensive income (loss) items: Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent [Abstract] Total net fair value, asset Derivative Asset Deferred income tax provision (benefit) Total deferred tax benefit (expense) Deferred Income Tax Expense (Benefit) Preferred Stock Redemptions [Roll Forward] Preferred Stock Redemptions [Roll Forward] Preferred Stock Redemptions Subsequent Event Type [Axis] Subsequent Event Type [Axis] Statement of Comprehensive Income [Abstract] Statement of Comprehensive Income [Abstract] Third-Party Sites Third Party Sites [Member] This element indicates sites not listed or proposed for listing by the U.S. Environmental Protection Agency on the CERCLA National Priorities List (NPL), which are operated by third parties. 4.500% senior notes due 2044 Senior Notes 4.500 Percent Due 2044 [Member] Senior Notes 4.500 Percent Due 2044 [Member] Insider Trading Arrangements [Line Items] 7.125% debentures due 2027 Debentures 7.125 Percent Due 2027 [Member] Debentures 7.125 Percent Due 2027 [Member] Schedule of Segment Reporting Information, by Segment [Table] Schedule of Segment Reporting Information, by Segment [Table] Issuance of common stock and other, net of cancellations Issuance of Common Stock and Other, Net The change in equity due to the value of new stock issued during the period (net of issuance costs), as well as the value of stock issued during the period as a result of the exercise of stock options and other equity transactions. Entity Registrant Name Entity Registrant Name Material Terms of Trading Arrangement Material Terms of Trading Arrangement [Text Block] Award Timing Method Award Timing Method [Text Block] Preferred stock redemption - premium Redemption premium Preferred Stock Redemption Premium Taxes other than on income Taxes, Miscellaneous Preferred stock, voluntary redemption, percentage Preferred Stock, Voluntary Redemption, Percentage Preferred Stock, Voluntary Redemption, Percentage Remediation Balance Accrual for Environmental Loss Contingencies Gain on interest rate swaps, net Gain (Loss) on Interest Rate Swaps, Net [Member] Gain (Loss) on Interest Rate Swaps and Warrants, Net [Member] Issued as part of the merger (in shares) Stock Issued During Period, Shares, Acquisitions Warrants to Purchase Common Stock, $0.20 par value Warrants To Purchase Common Stock [Member] Warrants To Purchase Common Stock Adjustment to Compensation, Amount Adjustment to Compensation Amount Oil Oil [Member] Financing portion of net cash received for derivative instruments Payments for (Proceeds from) Derivative Instrument, Financing Activities 6.950% senior notes due 2024 Senior Notes 6.950 Percent Due 2024 [Member] Senior Notes 6.950 Percent Due 2024 [Member] 7.150% debentures due 2028 Debentures 7.150 Percent Due 2028 [Member] Debentures 7.150 Percent Due 2028 [Member] Document Period End Date Document Period End Date Compensation Actually Paid vs. Net Income Compensation Actually Paid vs. Net Income [Text Block] Adoption Date Trading Arrangement Adoption Date Peer Group Issuers, Footnote Peer Group Issuers, Footnote [Text Block] Proceeds from exercise of warrants and options Proceeds From Warrant And Stock Option Exercises Proceeds From Warrant And Stock Option Exercises Preferred stock accrual rate per annum Preferred Stock, Dividend Rate, Percentage Disposal Group Name [Axis] Disposal Group Name [Axis] Net sales Sales [Member] Payments of long-term debt, net Payments of long-term debt Repayments of Long-Term Debt Non-current finance lease liabilities Long-term finance leases Finance Lease, Liability, Noncurrent Stretch of lower passaic river not covered by remedial actions River Stretch Which May Require Remedial Actions Represents the stretch of river which may be covered by remedial actions. Treasury Stock Treasury Stock, Common [Member] Entity Central Index Key Entity Central Index Key Segment Information Segment Reporting Information [Line Items] Class of Warrant or Right [Axis] Class of Warrant or Right [Axis] Non-Rule 10b5-1 Arrangement Terminated Non-Rule 10b5-1 Arrangement Terminated [Flag] Income tax benefit (expense) Total income tax benefit (expense) Income tax expense Income Tax Expense (Benefit) International Non-US [Member] Income Tax Authority [Domain] Income Tax Authority [Domain] Impairment of equity method investment Equity Method Investment, Other than Temporary Impairment Dividends on preferred stock Dividends, Preferred Stock, Cash Number of operating segments Number of Operating Segments 7.950% senior notes due 2039 Senior Notes 7.950 Percent Due 2039 [Member] Senior Notes 7.950 Percent Due 2039 [Member] Name Trading Arrangement, Individual Name Redemption of preferred stock Payments for Repurchase of Redeemable Preferred Stock Other comprehensive income, net of tax Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent Midstream and marketing Midstream Segment [Member] This member represents the midstream segment. 5.875% senior notes due 2025 Senior Notes 5.875 Percent Due 2025 [Member] Senior Notes 5.875 Percent Due 2025 Schedule of Revenue from Customers by Segment, Product, and Geographical Area Disaggregation of Revenue [Table Text Block] Corporate and eliminations Corporate Reconciling Items And Eliminations [Member] Eliminating entries and other corporate items used in business segment consolidation. Payments for settlement Payments for Legal Settlements Inventories Inventory Disclosure [Text Block] Revenue from customers Revenue from Contract with Customer, Excluding Assessed Tax Compensation Actually Paid vs. Company Selected Measure Compensation Actually Paid vs. Company Selected Measure [Text Block] Long-term Debt, Type [Axis] Long-Term Debt, Type [Axis] Amendment Flag Amendment Flag Financial assurance Environmental Remediation Expense, Performance Implementation Cost Environmental Remediation Expense, Performance Implementation Cost Environmental reserves, exceeding $ ten million, threshold value, number of sites Environmental Reserves Exceeding Ten Million Site Category, Number of Sites This item represents the number of sites with each site's reserves exceeding ten million. Asset retirement obligations Asset Retirement Obligations, Noncurrent Transportation and gathering expense Transportation And Gathering Expense Transportation And Gathering Expense Cash and cash equivalents Cash and cash equivalents Cash and Cash Equivalents, at Carrying Value Interest paid Interest Paid, Excluding Capitalized Interest, Operating Activities Other (in shares) Share-Based Compensation Arrangement by Share-Based Payment Award, Shares Issued in Period Schedule of Reconciliation of Revenue from Customers to Total Net Sales Reconciliation Of Revenue From Customers And Other Revenue To Total Revenue [Table Text Block] The disclosure of reconciliation of revenue from customers and other revenue to total revenue. Treasury stock purchases (in shares) Treasury Stock, Shares, Acquired Schedule of Repurchase Agreements Schedule of Repurchase Agreements [Table Text Block] Compensation Actually Paid vs. Other Measure Compensation Actually Paid vs. Other Measure [Text Block] Long-term debt, net Long-Term Debt, Excluding Current Maturities Non-cash income tax benefit from reorganization Non-Cash Income Tax Expense (Benefit) From Reorganization Non-Cash Income Tax Expense (Benefit) From Reorganization Dilutive effect of potentially dilutive securities (in shares) Weighted Average Number of Shares Outstanding, Diluted Forgone Recovery, Explanation of Impracticability Forgone Recovery, Explanation of Impracticability [Text Block] 3.450% senior notes due 2024 Senior Notes 3.450 Percent Due 2024 [Member] Senior Notes 3.450 Percent Due 2024 [Member] Non-voting general partner interest Limited Liability Company LLC Or Limited Partnership L P Non Voting General Partner Unit Interest Percentage Limited Liability Company LLC Or Limited Partnership L P Non Voting General Partner Unit Interest Percentage Revenue Revenue from Contract with Customer [Text Block] Capital expenditures Payments to Acquire Property, Plant, and Equipment Company Selected Measure Amount Company Selected Measure Amount Additional Paid-in Capital Additional Paid-in Capital [Member] Gains (losses) on derivatives Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax Common stock, redemption threshold, per share Common Stock, Redemption Threshold, Per Share Common Stock, Redemption Threshold, Per Share Balance Sheet Location [Axis] Balance Sheet Location [Axis] TOTAL ASSETS Assets Name Awards Close in Time to MNPI Disclosures, Individual Name Capitalized interest Interest Costs Capitalized Adjustment Income from equity investments and other Income (Loss) from Equity Method Investments Anadarko Anadarko Petroleum Corporation [Member] Anadarko Petroleum Corporation [Member] Cover page. Cover [Abstract] Currently Operated Sites Entity Operated Sites [Member] This element indicates sites not listed or proposed for listing by the U.S. Environmental Protection Agency on the CERCLA National Priorities List (NPL), which are operated by the entity. Position [Axis] Position [Axis] 7.730% debentures due 2096 Debentures 7.730 Percent Due 2096 [Member] Debentures 7.730 Percent Due 2096 [Member] Percentage of judgment amount claimed Percentage Of Litigation Settlement Claimed The percentage of litigation award claimed by third party. United States UNITED STATES REVENUES AND OTHER INCOME Revenues and Other Income [Abstract] Series A Preferred Stock Series A Preferred Stock [Member] Other Other Liabilities, Noncurrent Non-NEOs Non-NEOs [Member] Schedule of Supplemental Cash Flows Schedule of Cash Flow, Supplemental Disclosures [Table Text Block] Effective economic interest Limited Liability Company LLC Or Limited Partnership LP Effective Economic Interest Percentage Limited Liability Company LLC Or Limited Partnership LP Effective Economic Interest Percentage 7.500% debentures due 2026 Debentures 7.500 Percent Due 2026 [Member] Debentures 7.500 Percent Due 2026 [Member] Segments Segment Reporting Disclosure [Text Block] Decrease in cash, cash equivalents, restricted cash and restricted cash equivalents Cash, Cash Equivalents, Restricted Cash, and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect Number of parties, settled Number Of Parties, Settled Number Of Parties, Settled CASH FLOW FROM FINANCING ACTIVITIES Net Cash Provided by (Used in) Financing Activities [Abstract] Gas Natural Gas [Member] Non-PEO NEO Non-PEO NEO [Member] Equity Component [Domain] Equity Component [Domain] Current finance lease liabilities Current finance leases Finance Lease, Liability, Current Adjustment to Compensation: Adjustment to Compensation [Axis] Maxus Filed Bankruptcy Maxus Filed Bankruptcy [Member] Maxus Filed Bankruptcy State State and Local Jurisdiction [Member] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Preferred stock redemption payable Preferred Stock, Redemption Amount, Payable Preferred Stock, Redemption Amount, Payable Weighted-average number of basic shares (in shares) Weighted Average Number of Shares Outstanding, Basic Scenario [Axis] Scenario [Axis] Long-term Debt Debt Instrument [Line Items] Pension and postretirement gains (losses) Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, after Tax Entity Current Reporting Status Entity Current Reporting Status Redemption value in excess of carrying value Redemption Value In Excess Of Carrying Amount Redemption Value In Excess Of Carrying Amount Consolidated Entities [Domain] Consolidated Entities [Domain] Pay vs Performance Disclosure Pay vs Performance Disclosure [Table] Statement [Line Items] Statement [Line Items] Segments [Axis] Segments [Axis] Estimate of Fair Value Measurement Estimate of Fair Value Measurement [Member] Regulatory Asset [Axis] Regulatory Asset [Axis] Scenario [Domain] Scenario [Domain] LONG-TERM RECEIVABLES AND OTHER ASSETS, NET Long Term Receivables and Other Noncurrent Assets, Net Amount due from customers or clients, more than one year from the balance sheet date, for goods or services that have been delivered or sold in the normal course of business, reduced to the estimated net realizable fair value by an allowance established by the entity of the amount it deems uncertain of collection, and the aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet due to materiality considerations. Forgone Recovery due to Disqualification of Tax Benefits, Amount Forgone Recovery due to Disqualification of Tax Benefits, Amount Awards Close in Time to MNPI Disclosures Awards Close in Time to MNPI Disclosures [Table] Environmental remediation liabilities Environmental remediation reserves, non-current, included in deferred credits and other liabilities - other Accrued Environmental Loss Contingencies, Noncurrent Environmental remediation contingency, number of site categories Environmental Remediation Contingency, Number Of Site Categories Environmental Remediation Contingency, Number Of Site Categories NGL Natural Gas Liquids [Member] LONG-TERM DEBT, NET Long-Term Debt, Excluding Current Maturities [Abstract] Diamond Alkali Superfund Site Diamond Alkali Superfund Site [Member] Diamond Alkali Superfund Site Gains on sales of assets, net Gain on Sale of Equity Investments and Other Assets Gain on Sale of Equity Investments and Other Assets