XML 137 R125.htm IDEA: XBRL DOCUMENT
v3.20.2

Employee Benefit Plans - Other Plan Narrative (Details) shares in Millions, $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) shares | Dec. 31, 2018 USD ($) | Dec. 31, 2017 USD ($)
Share-based Compensation Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Share Based Compensation Plan, number of shares authorized | shares | 79 |  |
Other Postretirement Benefit Plans, Defined Benefit [Member] | Share-based Compensation Plan |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Deferred Compensation Arrangement with Individual, Maximum Contractual Term | 10 years |  |
U.S. |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Contribution Plan Maximum Annual Contributions Per Employee Percent | 75.00% |  |
Number Of Investment Funds In Which Employee Can Contribute [Member] | (17) |  |
Defined Contribution Plan, Employer Matching Contribution, Percent | 1.00% |  |
Defined Contribution Plan Employer Matching Contribution Percent Of Match | 6.00% |  |
Employer Matching Discretionary Contribution Percent | 6.00% |  |
Company contributions charged to expense for defined contribution plan | $ | $ 82 | $ 82 | $ 77
U.S. | cop_IncentiveStockOptionsMember [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Share Based Compensation Plan, number of shares authorized | shares | 40 |  |
U.S. | Company Retirement Contribution (CRC) |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Defined Contribution Plan Employer Matching Contribution Percent Of Match | 6.00% |  |
Defined Contribution Plan Employers Vesting Period | 3 years |  |
Defined contribution plan employers vesting percent | 100.00% |  |
Foreign Plan [Member] |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |
Company contributions charged to expense for defined contribution plan | $ | $ 30 | $ 31 | $ 35

X
- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition. + References No definition available. + Details
Name: | cop_DefinedContributionPlanEmployersVestingPeriod
Namespace Prefix: | cop_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Definition Defined contribution plan employers vesting percent. + References No definition available. + Details
Name: | cop_DefinedContributionPlanVestingPercent
Namespace Prefix: | cop_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage Potential company discretionary cash contribution to eligible participants in savings plan. + References No definition available. + Details
Name: | cop_EmployerMatchingDiscretionaryContributionPercent
Namespace Prefix: | cop_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number Of investment funds in which employee can contribute in the defined contribution plan. + References No definition available. + Details
Name: | cop_NumberOfInvestmentFundsInWhichEmployeeCanContribute
Namespace Prefix: | cop_
Data Type: | xbrli:pureItemType
Balance Type: | na
Period Type: | instant

X
- Definition Maximum term of the deferred compensation arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 710 -SubTopic 10 -Section 55 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=6409961&loc=d3e20487-108367 + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualMaximumContractualTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
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_DefinedBenefitPlanDisclosureLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of cost for defined contribution plan. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 70 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=49170846&loc=d3e28014-114942 + Details
Name: | us-gaap_DefinedContributionPlanCostRecognized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanEmployerMatchingContributionPercentOfMatch
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
Name: | us-gaap_DefinedContributionPlanMaximumAnnualContributionsPerEmployeePercent
Namespace Prefix: | us-gaap_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Number of shares authorized for issuance under share-based payment arrangement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | us-gaap_PlanNameAxis=cop_TwentyFourteenOmnibusStockAndPerformanceIncentivePlanOfConocoPhillipsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanTypeAxis=us-gaap_OtherPostretirementBenefitPlansDefinedBenefitMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=country_US
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_AwardTypeAxis=cop_IncentiveStockOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=cop_DefinedContributionPlanCompanyRetirementContributionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RetirementPlanSponsorLocationAxis=us-gaap_ForeignPlanMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |