XML 78 R63.htm IDEA: XBRL DOCUMENT
v3.20.2

Derivative and Financial Instruments - FX Notional (Details) £ in Millions, $ in Millions | 9 Months Ended |  |  |  |
--- | --- | --- | --- | --- | ---
Sep. 30, 2020 CAD ($) | Sep. 30, 2020 GBP (£) | Mar. 31, 2020 CAD ($) $ / $ | Dec. 31, 2019 CAD ($) | Dec. 31, 2019 GBP (£) | Jun. 30, 2019 CAD ($) $ / $
Notional Disclosures [Abstract] |  |  |  |  |  |
Description of Foreign Currency Derivative Instruments Not Designated as Hedging Instruments Activities | In the second quarter of 2019, we entered into foreign currency exchange contracts to sell CAD 1.35 billion at CAD 0.748 against the USD. In the first quarter of 2020, we entered into forward currency exchange contracts to buy CAD 0.9 billion at CAD 0.718 against the USD |  |  |  |  |
Buy British Pound Sell Euro [Member] |  |  |  |  |  |
Notional Disclosures [Abstract] |  |  |  |  |  |
Net notional position of foreign currency exchange derivatives | £ |  | £ 3 |  |  | £ 4 |
Sell Canadian dollar, buy U.S. dollar [Member] |  |  |  |  |  |
Notional Disclosures [Abstract] |  |  |  |  |  |
Net notional position of foreign currency exchange derivatives | $ 416 |  |  | $ 1,337 |  |
Sell Canadian dollar, buy U.S. dollar [Member] | Nondesignated [Member] |  |  |  |  |  |
Notional Disclosures [Abstract] |  |  |  |  |  |
Net notional position of foreign currency exchange derivatives |  |  |  |  |  | $ 1,350
Derivative, Currency Bought | USD |  |  |  |  |
Derivative, Currency Sold | CAD |  |  |  |  |
Derivative, Forward Exchange Rate | $ / $ |  |  |  |  |  | 0.748
Buy CAD, Sell USD [Member] | Nondesignated [Member] |  |  |  |  |  |
Notional Disclosures [Abstract] |  |  |  |  |  |
Net notional position of foreign currency exchange derivatives |  |  | $ 900 |  |  |
Derivative, Currency Bought | CAD |  |  |  |  |
Derivative, Currency Sold | USD |  |  |  |  |
Derivative, Forward Exchange Rate | $ / $ |  |  | 0.718 |  |  |

X
- Definition Identification of the specific currency to be purchased upon settlement or exercise of the foreign currency derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeCurrencyBought
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Identification of the specific currency to be sold upon settlement or exercise of the foreign currency derivative. + References No definition available. + Details
Name: | us-gaap_DerivativeCurrencySold
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Contractual rate at which a foreign currency can be purchased or sold. + References No definition available. + Details
Name: | us-gaap_DerivativeForwardExchangeRate1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Nominal or face amount used to calculate payment on derivative. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1B -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5580258-113959 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1A -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579245-113959 + Details
Name: | us-gaap_DerivativeNotionalAmount
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | instant

X
- Definition General discussion of the entity's activities involving foreign currency derivatives not designated as hedging instruments. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=121590274&loc=d3e41638-113959 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=121590274&loc=SL5579240-113959 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=121590274&loc=d3e41620-113959 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121590274&loc=d3e41641-113959 + Details
Name: | us-gaap_DescriptionOfForeignCurrencyDerivativeInstrumentsNotDesignatedAsHedgingInstrumentsActivities
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_NotionalAmountOfDerivativesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

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

X
- Details
Name: | us-gaap_HedgingDesignationAxis=us-gaap_NondesignatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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