XML 88 R76.htm IDEA: XBRL DOCUMENT
v3.10.0.1

Cash Flow Information - Textual (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2017
Burlington Resources Inc Vs The Republic Of Ecuador [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Cash Proceeds from Legal Settlements |  | $ 262 |
Conoco Phillips Vs Petroleos de Venezuela SA [Member] |  |  |
Loss Contingencies [Line Items] |  |  |
Cash Proceeds from Legal Settlements | $ 103 |  |
Currency Swap [Member] |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |
Payments for Foreign Currency Derivative Instruments Not Designated as Hedging Instruments |  |  | $ 180

X
- Definition Cash outflow related to foreigh currecy transaction for derivatives. + References No definition available. + Details
Name: | cop_PaymentsForForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstruments
Namespace Prefix: | cop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_DerivativeInstrumentsGainLossLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Cash received for the settlement of litigation during the current period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 25 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3536-108585 + Details
Name: | us-gaap_ProceedsFromLegalSettlements
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | srt_LitigationCaseAxis=cop_BurlingtonResourcesIncVsTheRepublicOfEcuadorMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_LitigationCaseAxis=cop_ConocoPhillipsVsPetroleosDeVenezuelaSAMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_DerivativeInstrumentRiskAxis=us-gaap_CurrencySwapMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |