2.2.0.7 true Assets Held for Sale (Details) (USD $) 0605 - Disclosure - Assets Held for Sale (Details) true false false false 1 USD false false USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 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 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 3 USD true false false false us-gaap_ExplorationAndProductionEquipmentMember us-gaap_StatementBusinessSegmentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_ExplorationAndProductionEquipmentMember us-gaap_StatementBusinessSegmentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 4 USD true false false false us-gaap_RefiningEquipmentMember us-gaap_StatementBusinessSegmentsAxis xbrldi http://xbrl.org/2006/xbrldi us-gaap_RefiningEquipmentMember us-gaap_StatementBusinessSegmentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ false 5 true false false false cop_JointVentureOneMember us-gaap_StatementBusinessSegmentsAxis xbrldi http://xbrl.org/2006/xbrldi cop_JointVentureOneMember us-gaap_StatementBusinessSegmentsAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 false 6 USD true false false false cop_JointVentureOneMember us-gaap_StatementBusinessSegmentsAxis xbrldi http://xbrl.org/2006/xbrldi cop_JointVentureOneMember us-gaap_StatementBusinessSegmentsAxis explicitMember USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 $ 5 Assets Held For Sale (Textuals) [Abstract] 3 cop_AssetsHeldForSaleTextualsAbstract cop false na duration Assets Held For Sale Textuals 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 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false xbrli:stringItemType string Assets Held For Sale Textuals false 6 Approximate amount to be received on sale of assets 4 cop_ApproximateAmountToBeReceivedOnSaleOfAssets cop false na duration Approximate amount to be received on sale of assets. false false false false false false false false false false false label false 1 true true false false 10000000000 10000000000 false false false 2 false false false false 0 0 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false xbrli:monetaryItemType monetary Approximate amount to be received on sale of assets. No authoritative reference available. false 7 Noncurrent Assets classfied as current, Held for Sale 4 cop_NoncurrentAssetsHeldForSaleTotalClassifiedAsCurrent cop false debit instant Noncurrent Assets Held For Sale Total Classified As Current. 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 false false false 0 0 true false false 4 false true false false 323000000 323000000 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false xbrli:monetaryItemType monetary Noncurrent Assets Held For Sale Total Classified As Current. No authoritative reference available. false 8 Net properties plants and equipment, Held for Sale, reclassified from Noncurrent to Current 4 cop_NetPropertiesPlantsAndEquipmentHeldForSaleReclassifiedFromNoncurrentToCurrent cop false debit instant Net properties plants and equipment, Held for Sale, reclassified from Noncurrent to Current. 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 638000000 638000000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false xbrli:monetaryItemType monetary Net properties plants and equipment, Held for Sale, reclassified from Noncurrent to Current. No authoritative reference available. false 9 Asset retirement obligations and accrued environmental costs, Held for Sale, Noncurrent classified as current 4 cop_AssetRetirementObligationsAndAccruedEnvironmentalCostsNoncurrentLiabilitiesHeldForSaleClassifiedAsCurrent cop false credit instant Asset retirement obligations and accrued environmental costs Noncurrent Liabilities Held For Sale Classified As Current. 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 219000000 219000000 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false xbrli:monetaryItemType monetary Asset retirement obligations and accrued environmental costs Noncurrent Liabilities Held For Sale Classified As Current. No authoritative reference available. false 10 Deferred Income Taxes Reclassified from Noncurrent to Current. Held for Sale 4 cop_DeferredIncomeTaxesReclassifiedFromNoncurrentToCurrentHeldForSale cop false credit instant Deferred Income Taxes Reclassified from Noncurrent to Current. Held for Sale. false false false false false false false false false false false verboselabel false 1 false true false false 75000000 75000000 false false false 2 false false false false 0 0 false false false 3 false true false false 54000000 54000000 true false false 4 false true false false 75000000 75000000 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false xbrli:monetaryItemType monetary Deferred Income Taxes Reclassified from Noncurrent to Current. Held for Sale. No authoritative reference available. false 11 Gain on asset dispositions, excluding Syncrude and LUKOIL 4 cop_LongLivedAssetHeldForSaleGainLossOnSale cop false credit duration Long Lived Asset Held For Sale Gain Loss On Sale. 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 475000000 475000000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true false false xbrli:monetaryItemType monetary Long Lived Asset Held For Sale Gain Loss On Sale. No authoritative reference available. false 12 Ownership interest in proportionally consolidated joint venture sold 4 cop_ProportionallyConsolidatedJointVentureOwnershipPercentage cop false na instant The percentage of ownership in a proportionally consolidated joint venture. 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 0.0903 0.0903 true false false us-types:percentItemType pure The percentage of ownership in a proportionally consolidated joint venture. No authoritative reference available. false 13 Sales price of proportionally consolidated joint venture 4 cop_SalesPriceOfProportionallyConsolidatedJointVenture cop false na instant Sales price of a proportionally consolidated joint venture. 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 4600000000 4600000000 true false false xbrli:monetaryItemType monetary Sales price of a proportionally consolidated joint venture. No authoritative reference available. false 14 Synthetic oil proved reserves in exploration and production segment (in barrels) 4 cop_SyntheticOilProvedReservesInExplorationAndProductionSegment cop false na duration Synthetic oil proved reserves in exploration and production segment. 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false 248000000 248000000 true false false 6 false false false false 0 0 true false false xbrli:integerItemType integer Synthetic oil proved reserves in exploration and production segment. No authoritative reference available. false 15 Number of production barrels per day 4 cop_NumberOfProductionBarrelsPerDay cop false na duration Number of production barrels per day. 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false true false false 23000 23000 true false false 6 false false false false 0 0 true false false xbrli:integerItemType integer Number of production barrels per day. No authoritative reference available. false 16 Gain on sale of Syncrude 4 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 true false false 2878000000 2878000000 false false false 3 false false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false false false false 0 0 true 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 17 Net carrying value of Syncrude 4 cop_DisposalGroupIncludingDiscontinuedOperationAsSetOfDisposalGroup cop false na instant Description, in aggregate or in detail, of the major classifications and carrying amounts of total assets sold, or to be... 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 1750000000 1750000000 true false false xbrli:monetaryItemType monetary Description, in aggregate or in detail, of the major classifications and carrying amounts of total assets sold, or to be sold, as part of the disposal group, including a component of the entity (discontinued operation). No authoritative reference available. false 18 Amount of PP&E in carrying value of Syncrude 4 us-gaap_DisposalGroupIncludingDiscontinuedOperationPropertyPlantAndEquipmentNet us-gaap true debit instant 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 1970000000 1970000000 true false false xbrli:monetaryItemType monetary For the disposal group, including a component of the entity (discontinued operation), carrying value (net of accumulated depreciation and any write-downs) of tangible assets that are held by an entity for use in the production or supply of goods and services, for rental to others, or for administrative purposes and that are expected to provide economic benefit for more than one year. Examples include land, buildings, vehicles and production equipment. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 144 -Paragraph 47 -Subparagraph a false 19 Syncrude portion of Sales and other operating revenue, through dispositon date 4 cop_SyncrudePortionOfSalesAndOtherOperatingRevenueThroughDispositonDate cop false credit instant For a disposal group that is a component of the entity (discontinued operation), in the period in which the operations are... 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 327000000 327000000 true false false xbrli:monetaryItemType monetary For a disposal group that is a component of the entity (discontinued operation), in the period in which the operations are initially classified as discontinued, the amounts of intercompany revenue that were previously eliminated in consolidation for periods before the disposal transaction (in situations where revenue and cost producing activities with the disposed component will continue after disposal). No authoritative reference available. false 20 Syncrude portion of Income before income taxes, through dispositon date 4 cop_SyncrudePortionOfIncomeBeforeIncomeTaxesThroughDispositonDate cop false credit instant Pretax income (loss) from operations of a business component (exclusive of any gain or loss on disposal, or provision... 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 false true false false 127000000 127000000 true false false xbrli:monetaryItemType monetary Pretax income (loss) from operations of a business component (exclusive of any gain or loss on disposal, or provision therefore) during the reporting period, until its disposal. No authoritative reference available. false 21 Syncrude portion of Net income, through dispositon date 4 cop_SyncrudePortionOfNetIncomeThroughDispositonDate cop false credit instant After tax income (loss) from operations of a business component (exclusive of any gain or loss on disposal, or provision... 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 false false false 0 0 true false false 4 false false false false 0 0 true false false 5 false false false false 0 0 true false false 6 true true false false 93000000 93000000 true false false xbrli:monetaryItemType monetary After tax income (loss) from operations of a business component (exclusive of any gain or loss on disposal, or provision therefore) during the reporting period, until its disposal. No authoritative reference available. false 6 17 false NoRounding UnKnown UnKnown false true