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v3.23.1

Related Party Transactions - Schedule of Significant Transactions with Related Parties (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2023 | Mar. 31, 2022
Significant Transactions with Equity Affiliates |  |
Operating revenues and other income | $ 21 | $ 22
Operating expenses and selling, general and administrative expenses | $ 78 | $ 46

X
- Definition Revenue from related parties. + References No definition available. + Details
Name: | cop_RelatedPartyRevenue
Namespace Prefix: | cop_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Related party transaction. + References No definition available. + Details
Name: | cop_RelatedPartyTransactionAbstract
Namespace Prefix: | cop_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of selling, general and administrative expenses resulting from transactions, excluding transactions that are eliminated in consolidated or combined financial statements, with related party. + References No definition available. + Details
Name: | us-gaap_RelatedPartyTransactionSellingGeneralAndAdministrativeExpensesFromTransactionsWithRelatedParty
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration