2.2.0.7 true Variable Interest Entities (VIEs) (Details) (USD $) 0603 - Disclosure - Variable Interest Entities (VIEs) (Details) true false In Millions, unless otherwise specified false false 1 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 Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 $ 2 Variable Interest Entities (VIEs) (Textuals) [Abstract] 2 cop_VariableInterestEntitiesViesTextualsAbstract cop false na duration Variable Interest Entities Vies Textuals. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false xbrli:stringItemType string Variable Interest Entities Vies Textuals. false 3 Ownership percentage in equity investment 2 us-gaap_EquityMethodInvestmentOwnershipPercentage us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0.059 0.059 false false false us-types:percentItemType pure The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) false 10 NMNG [Member] 0 na true na na No definition available. false true false false false false false false false false false http://conocophillips.com/role/variableinterestentitiesdetails false 1 false false false false 0 0 false false false false 2 USD true false false false NMNG [Member] us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis xbrldi http://xbrl.org/2006/xbrldi cop_EquityCompanyOneMember us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 11 Variable Interest Entities (VIEs) (Textuals) [Abstract] 2 cop_VariableInterestEntitiesViesTextualsAbstract cop false na duration Variable Interest Entities Vies Textuals. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false xbrli:stringItemType string Variable Interest Entities Vies Textuals. false 12 Ownership percentage in equity investment 2 us-gaap_EquityMethodInvestmentOwnershipPercentage us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0.3 0.3 false false false us-types:percentItemType pure The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) false 13 Governance interest in variable interest entity 2 us-gaap_VariableInterestEntityOwnershipPercentage us-gaap true na duration No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0.5 0.5 false false false us-types:percentItemType pure Percentage of the VIE's voting interest owned by the registrant. In general, a VIE is a corporation, partnership, trust, or any other legal structure used for business purposes that either (a) does not have equity investors with voting rights or (b) has equity investors that do not provide sufficient financial resources for the entity to support its activities. A VIE often holds financial assets, including loans or receivables, real estate or other property. A VIE may be essentially passive or it may engage in research and development or other activities on behalf of another company. No authoritative reference available. false 14 Ownership interest of LUKOIL in NMNG 2 cop_OwnershipInterestOfOthersInVie cop false na duration Ownership interest of others in a VIE. false false false false false false false false false false false verboselabel false 1 false true false false 0.7 0.7 false false false us-types:percentItemType pure Ownership interest of others in a VIE. No authoritative reference available. false 15 Direct ownership interest in NMNG 2 cop_DirectOwnershipInterestInVie cop false na duration Direct ownership interest in Vie. false false false false false false false false false false false verboselabel false 1 false true false false 0.3 0.3 false false false us-types:percentItemType pure Direct ownership interest in Vie. No authoritative reference available. false 16 Book value of equity method investment 2 us-gaap_EquityMethodInvestments us-gaap true debit instant No definition available. false false false false false false false false false false false verboselabel false 1 true true false false 1414000000 1414 false false false xbrli:monetaryItemType monetary This item represents the carrying amount on the entity's balance sheet of its investment in common stock of an equity method investee. This is not an indicator of the fair value of the investment, rather it is the initial cost adjusted for the entity's share of earnings and losses of the investee, adjusted for any distributions (dividends) and other than temporary impairment losses recognized. No authoritative reference available. false 19 Freeport LNG [Member] 0 na true na na No definition available. false true false false false false false false false false false http://conocophillips.com/role/variableinterestentitiesdetails false 1 false false false false 0 0 false false false false 3 USD true false false false Freeport LNG [Member] us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis xbrldi http://xbrl.org/2006/xbrldi cop_EquityCompanyThreeMember us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 $ na No definition available. No authoritative reference available. false 20 Variable Interest Entities (VIEs) (Textuals) [Abstract] 2 cop_VariableInterestEntitiesViesTextualsAbstract cop false na duration Variable Interest Entities Vies Textuals. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false xbrli:stringItemType string Variable Interest Entities Vies Textuals. false 26 Long-term agreement with Freeport LNG to use LNG regasification capacity, cubic feet per day 2 cop_LongTermAgreementToUseRegasificationCapacityCubicFeetPerDay cop false na duration Long-term agreement with Freeport LNG to use LNG regasification capacity, cubic feet per day. false false false false false false false false false false false verboselabel false 1 false true false false 900000000 900000000 false false false xbrli:decimalItemType decimal Long-term agreement with Freeport LNG to use LNG regasification capacity, cubic feet per day. No authoritative reference available. false 27 Loan balance outstanding 2 cop_LoanBalanceOutstandingToVie cop false credit instant Loan balance outstanding to VIE. false false false false false false false false false false false verboselabel false 1 true true false false 663000000 663 false false false xbrli:monetaryItemType monetary Loan balance outstanding to VIE. No authoritative reference available. false 28 Freeport GP [Member] 0 na true na na No definition available. false true false false false false false false false false false http://conocophillips.com/role/variableinterestentitiesdetails false 1 false false false false 0 0 false false false false 4 true false false false Freeport GP [Member] us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis xbrldi http://xbrl.org/2006/xbrldi cop_EquityCompanyFourMember us-gaap_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis explicitMember Pure Standard http://www.xbrl.org/2003/instance pure xbrli 0 na No definition available. No authoritative reference available. false 29 Variable Interest Entities (VIEs) (Textuals) [Abstract] 2 cop_VariableInterestEntitiesViesTextualsAbstract cop false na duration Variable Interest Entities Vies Textuals. false false false false false true false false false false false verboselabel false 1 false false false false 0 0 false false false xbrli:stringItemType string Variable Interest Entities Vies Textuals. false 30 Ownership percentage in equity investment 2 us-gaap_EquityMethodInvestmentOwnershipPercentage us-gaap true na instant No definition available. false false false false false false false false false false false verboselabel false 1 false true false false 0.5 0.5 false false false us-types:percentItemType pure The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting. Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 159 -Paragraph 18 -Subparagraph f Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher AICPA -Name Accounting Principles Board Opinion (APB) -Number 18 -Paragraph 20 -Subparagraph a (1) false 1 16 false Millions UnKnown UnKnown true true