2.2.0.7 true Supplementary Information - Condensed Consolidating - Financial Information (Details 1) (USD $) 06211 - Disclosure - Supplementary Information - Condensed Consolidating - Financial Information (Details 1) true false In Millions false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 2 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 3 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ false 4 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 USDEPS Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 3 2 us-gaap_SalesRevenueNet us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 47208000000 47208 [1] false false false 2 true true false false 40173000000 40173 [1] false false false 3 true true false false 137715000000 137715 [1] false false false 4 true true false false 106362000000 106362 [1] false false false xbrli:monetaryItemType monetary Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 4 2 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1004000000 1004 false false false 2 false true false false 981000000 981 [2] false false false 3 false true false false 2960000000 2960 false false false 4 false true false false 1986000000 1986 [2] false false false xbrli:monetaryItemType monetary This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b false 5 2 us-gaap_GainLossOnSaleOfOilAndGasProperty us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 2878000000 2878 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary Gain or loss recorded from sale of oil and gas properties, includes the realized gains (losses) on the sale of proved and unproved oil and gas properties. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 41, 44, 45, 46, 47 false 6 2 us-gaap_OtherNonoperatingIncome us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1337000000 1337 false false false 2 false true false false 117000000 117 [2] false false false 3 false true false false 1885000000 1885 false false false 4 false true false false 347000000 347 [2] false false false xbrli:monetaryItemType monetary The aggregate amount of other income amounts resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 80 -Subparagraph Exhibit 4-4 -IssueDate 2006-05-01 false 8 2 cop_TotalRevenuesAndOtherIncome cop false credit duration Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. false false false false false false false false false false false totallabel false 1 false true false false 49549000000 49549 false false false 2 false true false false 41271000000 41271 [2] false false false 3 false true false false 145438000000 145438 false false false 4 false true false false 108695000000 108695 [2] false false false xbrli:monetaryItemType monetary Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. No authoritative reference available. true 9 2 cop_CostAndExpensesAbstract cop false na duration Costs and Expenses. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Costs and Expenses. false 10 2 us-gaap_CostOfPurchasedOilAndGas us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 34051000000 34051 false false false 2 false true false false 28008000000 28008 false false false 3 false true false false 97660000000 97660 false false false 4 false true false false 72376000000 72376 false false false xbrli:monetaryItemType monetary Cost of oil and gas purchased during the reporting period. No authoritative reference available. false 11 2 cop_ProductionAndOperatingExpenses cop false debit duration Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense;... false false false false false false false false false false false label false 1 false true false false 2583000000 2583 false false false 2 false true false false 2534000000 2534 false false false 3 false true false false 7729000000 7729 false false false 4 false true false false 7652000000 7652 false false false xbrli:monetaryItemType monetary Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense; Accretion; and Exploration Expense. No authoritative reference available. false 12 2 us-gaap_SellingGeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 493000000 493 false false false 2 false true false false 427000000 427 false false false 3 false true false false 1375000000 1375 false false false 4 false true false false 1378000000 1378 false false false xbrli:monetaryItemType monetary The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. 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Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. 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No authoritative reference available. false 15 2 us-gaap_AssetImpairmentCharges us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 59000000 59 false false false 2 false true false false 56000000 56 false false false 3 false true false false 1682000000 1682 false false false 4 false true false false 110000000 110 false false false xbrli:monetaryItemType monetary The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. 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Also includes excise taxes. No authoritative reference available. false 17 2 cop_AccretionOnDiscountedLiabilities cop false debit duration Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present value,... false false false false false false false false false false false verboselabel false 1 false true false false 110000000 110 false false false 2 false true false false 96000000 96 false false false 3 false true false false 337000000 337 false false false 4 false true false false 308000000 308 false false false xbrli:monetaryItemType monetary Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present value, including accretion associated with asset retirement obligations, decommissioning, environmental, and other contingencies. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 false 19 2 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax us-gaap true credit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false -10000000 -10 false false false 2 false true false false -17000000 -17 false false false 3 false true false false 80000000 80 false false false 4 false true false false -28000000 -28 false false false xbrli:monetaryItemType monetary The aggregate foreign currency transaction gain or loss (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains or losses may be disclosed as dealer gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 30 true 20 2 cop_TotalCostsAndExpenses cop false debit duration Total costs and expenses, including operating expenses and non-operating expenses. false false false false false false false false false false false totallabel false 1 false true false false 44275000000 44275 false false false 2 false true false false 38358000000 38358 false false false 3 false true false false 129980000000 129980 false false false 4 false true false false 101852000000 101852 false false false xbrli:monetaryItemType monetary Total costs and expenses, including operating expenses and non-operating expenses. No authoritative reference available. true 21 2 cop_IncomeLossBeforeIncomeTaxes cop false credit duration Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in... false false false false false false false false false false false verboselabel false 1 false true false false 5274000000 5274 false false false 2 false true false false 2913000000 2913 [2] false false false 3 false true false false 15458000000 15458 false false false 4 false true false false 6843000000 6843 [2] false false false xbrli:monetaryItemType monetary Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in earnings of affiliates. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b true 23 2 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 3069000000 3069 false false false 2 false true false false 1487000000 1487 [2] false false false 3 false true false false 9364000000 9364 false false false 4 false true false false 3178000000 3178 [2] false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 true 25 2 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 3055000000 3055 false false false 2 false true false false 1470000000 1470 [2] false false false 3 false true false false 9317000000 9317 false false false 4 false true false false 3129000000 3129 [2] false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. 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No authoritative reference available. false 27 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 29 2 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 3214000000 3214 false false false 2 false true false false 1576000000 1576 false false false 3 false true false false 9751000000 9751 false false false 4 false true false false 3413000000 3413 false false false xbrli:monetaryItemType monetary This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. 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No authoritative reference available. false 37 2 us-gaap_SellingGeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 2000000 2 false false false 2 false true false false 4000000 4 false false false 3 false true false false 9000000 9 false false false 4 false true false false 12000000 12 false false false xbrli:monetaryItemType monetary The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 4 -Paragraph 5A false 43 2 us-gaap_InterestAndDebtExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 243000000 243 false false false 2 false true false false 173000000 173 false false false 3 false true false false 662000000 662 false false false 4 false true false false 452000000 452 false false false xbrli:monetaryItemType monetary Interest and debt related expenses associated with nonoperating financing activities of the entity. 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No authoritative reference available. true 46 2 cop_IncomeLossBeforeIncomeTaxes cop false credit duration Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in... false false false false false false false false false false false verboselabel false 1 false true false false 2970000000 2970 false false false 2 false true false false 1413000000 1413 false false false 3 false true false false 9084000000 9084 false false false 4 false true false false 2976000000 2976 false false false xbrli:monetaryItemType monetary Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in earnings of affiliates. No authoritative reference available. false 47 2 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false -85000000 -85 false false false 2 false true false false -57000000 -57 false false false 3 false true false false -233000000 -233 false false false 4 false true false false -153000000 -153 false false false xbrli:monetaryItemType monetary The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b true 48 2 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 3055000000 3055 false false false 2 false true false false 1470000000 1470 false false false 3 false true false false 9317000000 9317 false false false 4 false true false false 3129000000 3129 false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 50 2 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 3055000000 3055 false false false 2 false true false false 1470000000 1470 false false false 3 false true false false 9317000000 9317 false false false 4 false true false false 3129000000 3129 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 true 51 0 na true na na No definition available. false true false false false false false false false false false http://conocophillips.com/role/financialinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 9 USD true false false false ConocoPhillips Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 10 USD true false false false ConocoPhillips Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 11 USD true false false false ConocoPhillips Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 12 USD true false false false ConocoPhillips Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_SubsidiariesMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 52 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 53 2 us-gaap_SalesRevenueNet us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 28283000000 28283 [1] false false false 2 false true false false 24981000000 24981 [1] false false false 3 false true false false 85619000000 85619 [1] false false false 4 false true false false 64437000000 64437 [1] false false false xbrli:monetaryItemType monetary Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 1 -Article 5 false 54 2 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 3728000000 3728 false false false 2 false true false false 1695000000 1695 false false false 3 false true false false 10916000000 10916 false false false 4 false true false false 3726000000 3726 false false false xbrli:monetaryItemType monetary This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b false 55 2 us-gaap_GainLossOnSaleOfOilAndGasProperty us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false -12000000 -12 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary Gain or loss recorded from sale of oil and gas properties, includes the realized gains (losses) on the sale of proved and unproved oil and gas properties. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 41, 44, 45, 46, 47 false 56 2 us-gaap_OtherNonoperatingIncome us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 59000000 59 false false false 2 false true false false 150000000 150 false false false 3 false true false false 188000000 188 false false false 4 false true false false 469000000 469 false false false xbrli:monetaryItemType monetary The aggregate amount of other income amounts resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 80 -Subparagraph Exhibit 4-4 -IssueDate 2006-05-01 false 57 2 cop_IntercompanyRevenues cop false credit duration Intercompany revenues. false false false false false false false false false false false totallabel false 1 false true false false 439000000 439 false false false 2 false true false false 264000000 264 false false false 3 false true false false 713000000 713 false false false 4 false true false false 866000000 866 false false false xbrli:monetaryItemType monetary Intercompany revenues. No authoritative reference available. true 58 2 cop_TotalRevenuesAndOtherIncome cop false credit duration Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. false false false false false false false false false false false totallabel false 1 false true false false 32509000000 32509 false false false 2 false true false false 27090000000 27090 false false false 3 false true false false 97424000000 97424 false false false 4 false true false false 69498000000 69498 false false false xbrli:monetaryItemType monetary Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. No authoritative reference available. true 59 2 cop_CostAndExpensesAbstract cop false na duration Costs and Expenses. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Costs and Expenses. false 60 2 us-gaap_CostOfPurchasedOilAndGas us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 25561000000 25561 false false false 2 false true false false 22158000000 22158 false false false 3 false true false false 76927000000 76927 false false false 4 false true false false 56296000000 56296 false false false xbrli:monetaryItemType monetary Cost of oil and gas purchased during the reporting period. No authoritative reference available. false 61 2 cop_ProductionAndOperatingExpenses cop false debit duration Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense;... false false false false false false false false false false false label false 1 false true false false 1125000000 1125 false false false 2 false true false false 1057000000 1057 false false false 3 false true false false 3314000000 3314 false false false 4 false true false false 3271000000 3271 false false false xbrli:monetaryItemType monetary Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense; Accretion; and Exploration Expense. No authoritative reference available. false 62 2 us-gaap_SellingGeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 332000000 332 false false false 2 false true false false 275000000 275 false false false 3 false true false false 948000000 948 false false false 4 false true false false 907000000 907 false false false xbrli:monetaryItemType monetary The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 4 -Paragraph 5A false 63 2 us-gaap_ExplorationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 91000000 91 false false false 2 false true false false 90000000 90 false false false 3 false true false false 188000000 188 false false false 4 false true false false 206000000 206 false false false xbrli:monetaryItemType monetary Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 10 -Paragraph a -Subparagraph 15 -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-OGP -Chapter 2 -Paragraph 48 -IssueDate 2006-05-01 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 17 false 64 2 us-gaap_DepreciationDepletionAndAmortization us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 388000000 388 false false false 2 false true false false 432000000 432 false false false 3 false true false false 1204000000 1204 false false false 4 false true false false 1272000000 1272 false false false xbrli:monetaryItemType monetary The aggregate expense recognized in the current period that allocates the cost of tangible assets, intangible assets, or depleting assets to periods that benefit from use of the assets. No authoritative reference available. false 65 2 us-gaap_AssetImpairmentCharges us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false true false false 55000000 55 false false false 3 false true false false 17000000 17 false false false 4 false true false false 50000000 50 false false false xbrli:monetaryItemType monetary The charge against earnings resulting from the aggregate write down of all assets from their carrying value to their fair value. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 45, 46, 47 false 66 2 cop_TaxesOtherThanIncomeTaxes cop false debit duration Taxes other than income taxes, if not included elsewhere, that could include, payroll tax, property tax or other selling and... false false false false false false false false false false false verboselabel false 1 false true false false 1328000000 1328 [1] false false false 2 false true false false 1304000000 1304 [1] false false false 3 false true false false 3901000000 3901 [1] false false false 4 false true false false 3671000000 3671 [1] false false false xbrli:monetaryItemType monetary Taxes other than income taxes, if not included elsewhere, that could include, payroll tax, property tax or other selling and distribution-related taxes. Also includes excise taxes. No authoritative reference available. false 67 2 cop_AccretionOnDiscountedLiabilities cop false debit duration Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present value,... false false false false false false false false false false false verboselabel false 1 false true false false 15000000 15 false false false 2 false true false false 6000000 6 false false false 3 false true false false 46000000 46 false false false 4 false true false false 43000000 43 false false false xbrli:monetaryItemType monetary Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present value, including accretion associated with asset retirement obligations, decommissioning, environmental, and other contingencies. No authoritative reference available. false 68 2 us-gaap_InterestAndDebtExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 111000000 111 false false false 2 false true false false 15000000 15 false false false 3 false true false false 359000000 359 false false false 4 false true false false 100000000 100 false false false xbrli:monetaryItemType monetary Interest and debt related expenses associated with nonoperating financing activities of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 false 69 2 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax us-gaap true credit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false -22000000 -22 false false false 2 false true false false 13000000 13 false false false 3 false true false false 13000000 13 false false false 4 false true false false -30000000 -30 false false false xbrli:monetaryItemType monetary The aggregate foreign currency transaction gain or loss (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains or losses may be disclosed as dealer gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 30 true 70 2 cop_TotalCostsAndExpenses cop false debit duration Total costs and expenses, including operating expenses and non-operating expenses. false false false false false false false false false false false totallabel false 1 false true false false 28929000000 28929 false false false 2 false true false false 25405000000 25405 false false false 3 false true false false 86917000000 86917 false false false 4 false true false false 65786000000 65786 false false false xbrli:monetaryItemType monetary Total costs and expenses, including operating expenses and non-operating expenses. No authoritative reference available. true 71 2 cop_IncomeLossBeforeIncomeTaxes cop false credit duration Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in... false false false false false false false false false false false verboselabel false 1 false true false false 3580000000 3580 false false false 2 false true false false 1685000000 1685 false false false 3 false true false false 10507000000 10507 false false false 4 false true false false 3712000000 3712 false false false xbrli:monetaryItemType monetary Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in earnings of affiliates. No authoritative reference available. false 72 2 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 366000000 366 false false false 2 false true false false 109000000 109 false false false 3 false true false false 756000000 756 false false false 4 false true false false 299000000 299 false false false xbrli:monetaryItemType monetary The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b true 73 2 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 3214000000 3214 false false false 2 false true false false 1576000000 1576 false false false 3 false true false false 9751000000 9751 false false false 4 false true false false 3413000000 3413 false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 75 2 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 3214000000 3214 false false false 2 false true false false 1576000000 1576 false false false 3 false true false false 9751000000 9751 false false false 4 false true false false 3413000000 3413 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 true 76 0 na true na na No definition available. false true false false false false false false false false false http://conocophillips.com/role/financialinformationdetails false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false false 13 USD true false false false ConocoPhillips Australia Funding Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi cop_SubsidiariesCompanyOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 14 USD true false false false ConocoPhillips Australia Funding Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi cop_SubsidiariesCompanyOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 15 USD true false false false ConocoPhillips Australia Funding Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi cop_SubsidiariesCompanyOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 16 USD true false false false ConocoPhillips Australia Funding Company [Member] dei_LegalEntityAxis xbrldi http://xbrl.org/2006/xbrldi cop_SubsidiariesCompanyOneMember dei_LegalEntityAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 77 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 82 2 cop_IntercompanyRevenues cop false credit duration Intercompany revenues. false false false false false false false false false false false totallabel false 1 false true false false 11000000 11 false false false 2 false true false false 11000000 11 false false false 3 false true false false 34000000 34 false false false 4 false true false false 40000000 40 false false false xbrli:monetaryItemType monetary Intercompany revenues. No authoritative reference available. true 83 2 cop_TotalRevenuesAndOtherIncome cop false credit duration Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. false false false false false false false false false false false totallabel false 1 false true false false 11000000 11 false false false 2 false true false false 11000000 11 false false false 3 false true false false 34000000 34 false false false 4 false true false false 40000000 40 false false false xbrli:monetaryItemType monetary Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. No authoritative reference available. true 84 2 cop_CostAndExpensesAbstract cop false na duration Costs and Expenses. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Costs and Expenses. false 93 2 us-gaap_InterestAndDebtExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 10000000 10 false false false 2 false true false false 10000000 10 false false false 3 false true false false 31000000 31 false false false 4 false true false false 36000000 36 false false false xbrli:monetaryItemType monetary Interest and debt related expenses associated with nonoperating financing activities of the entity. 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No authoritative reference available. true 96 2 cop_IncomeLossBeforeIncomeTaxes cop false credit duration Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in... false false false false false false false false false false false verboselabel false 1 false true false false 1000000 1 false false false 2 false true false false 1000000 1 false false false 3 false true false false 3000000 3 false false false 4 false true false false 4000000 4 false false false xbrli:monetaryItemType monetary Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in earnings of affiliates. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 08 -Paragraph h -Article 4 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 109 -Paragraph 45 -Subparagraph a, b true 98 2 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1000000 1 false false false 2 false true false false 1000000 1 false false false 3 false true false false 2000000 2 false false false 4 false true false false 3000000 3 false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 100 2 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1000000 1 false false false 2 false true false false 1000000 1 false false false 3 false true false false 2000000 2 false false false 4 false true false false 3000000 3 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. 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No authoritative reference available. false 102 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 107 2 cop_IntercompanyRevenues cop false credit duration Intercompany revenues. false false false false false false false false false false false totallabel false 1 false true false false 22000000 22 false false false 2 false true false false 20000000 20 false false false 3 false true false false 65000000 65 false false false 4 false true false false 57000000 57 false false false xbrli:monetaryItemType monetary Intercompany revenues. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 false 119 2 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax us-gaap true credit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false 50000000 50 false false false 2 false true false false 77000000 77 false false false 3 false true false false -5000000 -5 false false false 4 false true false false 132000000 132 false false false xbrli:monetaryItemType monetary The aggregate foreign currency transaction gain or loss (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains or losses may be disclosed as dealer gains or losses. 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No authoritative reference available. false 127 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 131 2 us-gaap_OtherNonoperatingIncome us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -28000000 -28 false false false 2 false false false false 0 0 false false false 3 false true false false -28000000 -28 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary The aggregate amount of other income amounts resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 80 -Subparagraph Exhibit 4-4 -IssueDate 2006-05-01 false 132 2 cop_IntercompanyRevenues cop false credit duration Intercompany revenues. false false false false false false false false false false false totallabel false 1 false true false false 8000000 8 false false false 2 false true false false 12000000 12 false false false 3 false true false false 58000000 58 false false false 4 false true false false 35000000 35 false false false xbrli:monetaryItemType monetary Intercompany revenues. 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No authoritative reference available. false 152 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 153 2 us-gaap_SalesRevenueNet us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 18925000000 18925 [1] false false false 2 false true false false 15192000000 15192 [1] false false false 3 false true false false 52096000000 52096 [1] false false false 4 false true false false 41925000000 41925 [1] false false false xbrli:monetaryItemType monetary Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. 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Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 19 -Subparagraph c Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 11 -Article 7 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 9 -Article 5 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 6 -Subparagraph b false 155 2 us-gaap_GainLossOnSaleOfOilAndGasProperty us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false true false false 2890000000 2890 false false false 4 false false false false 0 0 false false false xbrli:monetaryItemType monetary Gain or loss recorded from sale of oil and gas properties, includes the realized gains (losses) on the sale of proved and unproved oil and gas properties. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 19 -Paragraph 41, 44, 45, 46, 47 false 156 2 us-gaap_OtherNonoperatingIncome us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 1306000000 1306 false false false 2 false true false false -34000000 -34 false false false 3 false true false false 1725000000 1725 false false false 4 false true false false -122000000 -122 false false false xbrli:monetaryItemType monetary The aggregate amount of other income amounts resulting from ancillary business-related activities (that is, excluding major activities considered part of the normal operations of the business) also known as other nonoperating income recognized for the period. Such amounts may include: (a) dividends, (b) interest on securities, (c) profits on securities (net of losses), and (d) miscellaneous other income items. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 7 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Audit and Accounting Guide (AAG) -Number AAG-BRD -Chapter 4 -Paragraph 80 -Subparagraph Exhibit 4-4 -IssueDate 2006-05-01 false 157 2 cop_IntercompanyRevenues cop false credit duration Intercompany revenues. false false false false false false false false false false false totallabel false 1 false true false false 6675000000 6675 false false false 2 false true false false 5377000000 5377 false false false 3 false true false false 19556000000 19556 false false false 4 false true false false 12850000000 12850 false false false xbrli:monetaryItemType monetary Intercompany revenues. No authoritative reference available. true 158 2 cop_TotalRevenuesAndOtherIncome cop false credit duration Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. false false false false false false false false false false false totallabel false 1 false true false false 27617000000 27617 false false false 2 false true false false 21201000000 21201 false false false 3 false true false false 78651000000 78651 false false false 4 false true false false 55847000000 55847 false false false xbrli:monetaryItemType monetary Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. No authoritative reference available. true 159 2 cop_CostAndExpensesAbstract cop false na duration Costs and Expenses. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Costs and Expenses. false 160 2 us-gaap_CostOfPurchasedOilAndGas us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 15385000000 15385 false false false 2 false true false false 11395000000 11395 false false false 3 false true false false 40397000000 40397 false false false 4 false true false false 29331000000 29331 false false false xbrli:monetaryItemType monetary Cost of oil and gas purchased during the reporting period. No authoritative reference available. false 161 2 cop_ProductionAndOperatingExpenses cop false debit duration Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense;... false false false false false false false false false false false label false 1 false true false false 1479000000 1479 false false false 2 false true false false 1499000000 1499 false false false 3 false true false false 4487000000 4487 false false false 4 false true false false 4452000000 4452 false false false xbrli:monetaryItemType monetary Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense; Accretion; and Exploration Expense. No authoritative reference available. false 162 2 us-gaap_SellingGeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 160000000 160 false false false 2 false true false false 143000000 143 false false false 3 false true false false 445000000 445 false false false 4 false true false false 467000000 467 false false false xbrli:monetaryItemType monetary The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. General and administrative expenses include salaries of non-sales personnel, rent, utilities, communication, etc. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 4 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 43 -Chapter 4 -Paragraph 5A false 163 2 us-gaap_ExplorationExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 161000000 161 false false false 2 false true false false 296000000 296 false false false 3 false true false false 660000000 660 false false false 4 false true false false 648000000 648 false false false xbrli:monetaryItemType monetary Exploration expenses (including prospecting) related to oil and gas producing entities and would be included in operating expenses of that entity. Costs incurred in identifying areas that may warrant examination and in examining specific areas that are considered to have prospects of containing oil and gas reserves, including costs of drilling exploratory wells and exploratory-type stratigraphic test wells. Exploration costs may be incurred both before acquiring the related property (sometimes referred to in part as prospecting costs) and after acquiring the property. Principal types of exploration costs, which include depreciation and applicable operating costs of support equipment and facilities and other costs of exploration activities, are: (i) Costs of topographical, geographical and geophysical studies, rights of access to properties to conduct those studies, and salaries and other expenses of geologists, geophysical crews, and others conducting those studies. Collectively, these are sometimes referred to as geological and geophysical or "G&G" costs. (ii) Costs of carrying and retaining undeveloped properties, such as delay rentals, ad valorem taxes on properties, legal costs for title defense, and the maintenance of land and lease records. (iii) Dry hole contributions and bottom hole contributions. (iv) Costs of drilling and equipping exploratory wells. (v) Costs of drilling exploratory-type stratigraphic test wells. 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Also includes excise taxes. No authoritative reference available. false 167 2 cop_AccretionOnDiscountedLiabilities cop false debit duration Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present value,... false false false false false false false false false false false verboselabel false 1 false true false false 95000000 95 false false false 2 false true false false 90000000 90 false false false 3 false true false false 291000000 291 false false false 4 false true false false 265000000 265 false false false xbrli:monetaryItemType monetary Amount recognized for the passage of time, typically for liabilities, that have been discounted to their net present value, including accretion associated with asset retirement obligations, decommissioning, environmental, and other contingencies. No authoritative reference available. false 168 2 us-gaap_InterestAndDebtExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 109000000 109 false false false 2 false true false false 241000000 241 false false false 3 false true false false 433000000 433 false false false 4 false true false false 754000000 754 false false false xbrli:monetaryItemType monetary Interest and debt related expenses associated with nonoperating financing activities of the entity. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 34 -Paragraph 21 false 169 2 us-gaap_ForeignCurrencyTransactionGainLossBeforeTax us-gaap true credit duration No definition available. false false false false false false false false false false true negatedtotal false 1 false true false false -85000000 -85 false false false 2 false true false false -176000000 -176 false false false 3 false true false false 78000000 78 false false false 4 false true false false -308000000 -308 false false false xbrli:monetaryItemType monetary The aggregate foreign currency transaction gain or loss (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains or losses may be disclosed as dealer gains or losses. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 52 -Paragraph 30 true 170 2 cop_TotalCostsAndExpenses cop false debit duration Total costs and expenses, including operating expenses and non-operating expenses. false false false false false false false false false false false totallabel false 1 false true false false 22121000000 22121 false false false 2 false true false false 18285000000 18285 false false false 3 false true false false 62707000000 62707 false false false 4 false true false false 49033000000 49033 false false false xbrli:monetaryItemType monetary Total costs and expenses, including operating expenses and non-operating expenses. No authoritative reference available. true 171 2 cop_IncomeLossBeforeIncomeTaxes cop false credit duration Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in... false false false false false false false false false false false verboselabel false 1 false true false false 5496000000 5496 false false false 2 false true false false 2916000000 2916 false false false 3 false true false false 15944000000 15944 false false false 4 false true false false 6814000000 6814 false false false xbrli:monetaryItemType monetary Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in earnings of affiliates. No authoritative reference available. false 172 2 us-gaap_IncomeTaxExpenseBenefit us-gaap true debit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 1941000000 1941 false false false 2 false true false false 1373000000 1373 false false false 3 false true false false 5554000000 5554 false false false 4 false true false false 3532000000 3532 false false false xbrli:monetaryItemType monetary The sum of the current income tax expense (benefit) and the deferred income tax expense (benefit) pertaining to continuing operations. 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Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 true 175 2 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 false true false false 3541000000 3541 false false false 2 false true false false 1526000000 1526 false false false 3 false true false false 10343000000 10343 false false false 4 false true false false 3233000000 3233 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. 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No authoritative reference available. false 177 2 cop_RevenuesAndOtherIncomeAbstract cop false na duration Revenues and Other Income. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Revenues and Other Income. false 179 2 us-gaap_IncomeLossFromEquityMethodInvestments us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -6649000000 -6649 false false false 2 false true false false -2956000000 -2956 false false false 3 false true false false -20091000000 -20091 false false false 4 false true false false -6347000000 -6347 false false false xbrli:monetaryItemType monetary This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. Such amount typically reflects adjustments similar to those made in preparing consolidated statements, including adjustments to eliminate intercompany gains and losses, and to amortize, if appropriate, any difference between cost and underlying equity in net assets of the investee at the date of investment. 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No authoritative reference available. true 183 2 cop_TotalRevenuesAndOtherIncome cop false credit duration Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. false false false false false false false false false false false totallabel false 1 false true false false -13805000000 -13805 false false false 2 false true false false -8653000000 -8653 false false false 3 false true false false -40521000000 -40521 false false false 4 false true false false -20224000000 -20224 false false false xbrli:monetaryItemType monetary Aggregate revenue recognized during the period, including Other Income and Equity in Earnings of Affiliates. No authoritative reference available. true 184 2 cop_CostAndExpensesAbstract cop false na duration Costs and Expenses. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 false false false 4 false false false false 0 0 false false false xbrli:stringItemType string Costs and Expenses. false 185 2 us-gaap_CostOfPurchasedOilAndGas us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -6895000000 -6895 false false false 2 false true false false -5545000000 -5545 false false false 3 false true false false -19664000000 -19664 false false false 4 false true false false -13251000000 -13251 false false false xbrli:monetaryItemType monetary Cost of oil and gas purchased during the reporting period. No authoritative reference available. false 186 2 cop_ProductionAndOperatingExpenses cop false debit duration Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense;... false false false false false false false false false false false label false 1 false true false false -21000000 -21 false false false 2 false true false false -22000000 -22 false false false 3 false true false false -72000000 -72 false false false 4 false true false false -73000000 -73 false false false xbrli:monetaryItemType monetary Generally recurring costs associated with normal operations, excluding DD&A; Selling, General and Administrative Expense; Accretion; and Exploration Expense. No authoritative reference available. false 187 2 us-gaap_SellingGeneralAndAdministrativeExpense us-gaap true debit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -1000000 -1 false false false 2 false true false false 5000000 5 false false false 3 false true false false -27000000 -27 false false false 4 false true false false -8000000 -8 false false false xbrli:monetaryItemType monetary The aggregate total costs related to selling a firm's product and services, as well as all other general and administrative expenses. Direct selling expenses (for example, credit, warranty, and advertising) are expenses that can be directly linked to the sale of specific products. Indirect selling expenses are expenses that cannot be directly linked to the sale of specific products, for example telephone expenses, Internet, and postal charges. 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No authoritative reference available. true 196 2 cop_IncomeLossBeforeIncomeTaxes cop false credit duration Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in... false false false false false false false false false false false verboselabel false 1 false true false false -6649000000 -6649 false false false 2 false true false false -2956000000 -2956 false false false 3 false true false false -20091000000 -20091 false false false 4 false true false false -6347000000 -6347 false false false xbrli:monetaryItemType monetary Sum of operating profit and nonoperating income (expense) before income taxes and minority interest, and including equity in earnings of affiliates. No authoritative reference available. false 198 2 us-gaap_ProfitLoss us-gaap true credit duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false -6649000000 -6649 false false false 2 false true false false -2956000000 -2956 false false false 3 false true false false -20091000000 -20091 false false false 4 false true false false 6347000000 6347 false false false xbrli:monetaryItemType monetary The consolidated profit or loss for the period, net of income taxes, including the portion attributable to the noncontrolling interest. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A1, A4, A5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 5 -Subparagraph b Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 29 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph c(1) false 200 2 us-gaap_NetIncomeLoss us-gaap true credit duration No definition available. false false false false false false false false false false false totallabel false 1 true true false false -6649000000 -6649 false false false 2 true true false false -2956000000 -2956 false false false 3 true true false false -20091000000 -20091 false false false 4 true true false false -6347000000 -6347 false false false xbrli:monetaryItemType monetary The portion of consolidated profit or loss for the period, net of income taxes, which is attributable to the parent. If the entity does not present consolidated financial statements, the amount of profit or loss for the period, net of income taxes. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 19 -Article 5 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph d Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph A7 -Appendix A Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Research Bulletin (ARB) -Number 51 -Paragraph 38 -Subparagraph a Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 04 -Paragraph 20 -Article 9 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 130 -Paragraph 10, 15 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Emerging Issues Task Force (EITF) -Number 87-21 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 95 -Paragraph 28, 29, 30 true 1 Includes excise taxes on petroleum products sales of $3,544 and $3,538 in Three Months Ended September 30, 2010 and 2009 respectively, $10,181 and $9,914 in Nine Months Ended September 30, 2010 and 2009 respectively. 2 Recast to reflect a change in accounting principle. See Note 2-Changes in Accounting Principles, for more information. 4 138 false Millions UnKnown UnKnown false true