XML 113 R75.htm IDEA: XBRL DOCUMENT
v3.25.0.1

Accounting For Suspended Exploratory Well Costs (Change In Capitalized Suspended Exploratory Well Costs) (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Oil and Gas, Capitalized Exploratory Well Cost [Roll Forward] |  |  |
Balance beginning at January 1 | $ 3,559 | $ 3,512 | $ 4,120
Additions pending the determination of proved reserves | 453 | 200 | 378
Charged to expense | (69) | (95) | (259)
Reclassifications to wells, facilities and equipment based on the determination of proved reserves | (292) | (142) | (142)
Divestments/Other | (51) | 84 | (585)
Ending balance at December 31 | 3,600 | 3,559 | 3,512
Ending balance attributed to equity companies included above | $ 225 | $ 306 | $ 306

X
- Definition Amount of addition to capitalized exploratory well cost pending determination of proved reserve in oil- and gas-producing activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
Name: | us-gaap_CapitalizedExploratoryWellCostAdditionsPendingDeterminationOfProvedReserves
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a)(3) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
Name: | us-gaap_CapitalizedExploratoryWellCostChargedToExpense1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
Name: | us-gaap_CapitalizedExploratoryWellCosts
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
Name: | us-gaap_IncreaseDecreaseInCapitalizedExploratoryWellCostsThatArePendingDeterminationOfProvedReservesRollForward
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of reclassification of capitalized exploratory well cost to well, facility, and equipment based on determination of proved reserve in oil- and gas-producing activities. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 932 -SubTopic 235 -Name Accounting Standards Codification -Section 50 -Paragraph 1B -Subparagraph (a)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147477215/932-235-50-1B + Details
Name: | us-gaap_ReclassificationToWellFacilitiesAndEquipmentBasedOnDeterminationOfProvedReserves
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

X
- Definition Capitalized Exploratory Well Costs Attributable To Equity Companies + References No definition available. + Details
Name: | xom_CapitalizedExploratoryWellCostsAttributableToEquityCompanies
Namespace Prefix: | xom_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Previously capitalized costs of the drilling of wells that were related to assets that were divested or otherwise removed from capitalized costs. + References No definition available. + Details
Name: | xom_OtherCapitalizedExploratoryWellCosts
Namespace Prefix: | xom_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration