XML 65 R50.htm IDEA: XBRL DOCUMENT
v3.20.2

Suspended Wells - Textual (Details) $ in Millions | 9 Months Ended
--- | ---
Sep. 30, 2020 USD ($)
Suspended Wells [Abstract] |
Capitalized cost of suspended wells | $ 711
Increase (decrease) in capitalized cost of suspended wells | 309
Capitalized Exploratory Well Cost, Charged to Dry Hole Expense | $ 20
Number of wells charged to dry hole expense | one

X
- Definition Number of wells charged to dry hole expense. + References No definition available. + Details
Name: | cop_NumberOfWellsChargedToDryHoleExpense
Namespace Prefix: | cop_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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

X
- Definition Amount of expense for capitalized exploratory well costs for which proved reserves were not found at the exploratory well. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
Name: | us-gaap_CapitalizedExploratoryWellCostChargedToExpense1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of increase (decrease) in capitalized exploratory well costs. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph a -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
Name: | us-gaap_CapitalizedExploratoryWellCostPeriodIncreaseDecrease
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | na
Period Type: | duration

X
- Definition The amount of capitalized exploratory well costs that is pending the determination of proved reserves. This does not include amounts that were capitalized and subsequently expensed in the same annual period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 932 -SubTopic 235 -Section 50 -Paragraph 1B -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=68064819&loc=SL6806780-109447 + Details
Name: | us-gaap_CapitalizedExploratoryWellCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant