XML 42 R29.htm IDEA: XBRL DOCUMENT
v3.22.2.2

Investment in Cenovus Energy (Tables) | 9 Months Ended
--- | ---
Sep. 30, 2022
Cenovus Energy Inc |
Debt and Equity Securities, FV-NI [Line Items] |
Schedule of Gains and Losses Recorded in Other Income (Loss) |
| Millions of Dollars
| Three Months Ended September 30 | Nine Months Ended September 30
| 2022 | 2021 | 2022 | 2021
Total Net gain on equity securities | $ | — |  | 17 |  | 251 |  | 743 |
Less: Net gain (loss) on equity securities sold during the period | — |  | (50) |  | 251 |  | 177 |
Unrealized gain on equity securities still held at the reporting date | $ | — |  | 67 |  | $ | — |  | 566 |

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_ScheduleOfTradingSecuritiesAndOtherTradingAssetsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unrealized gains and losses on investments. + References No definition available. + Details
Name: | us-gaap_UnrealizedGainLossOnInvestmentsTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis=cop_CenovusEnergyIncMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |