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Property, Plant And Equipment And Asset Retirement Obligations (Narrative) (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Property, Plant and Equipment [Line Items] |  |  |
Impairment, long-lived asset, held-for-use, before-tax |  | $ 3,300 |
Accumulated depreciation and depletion | $ 259,585 | 272,445 |
Long-term asset retirement obligations | 10,886 | 11,942 |
Asset retirement obligations estimated cash payments in 2025 | 1,146 |  |
Asset retirement obligations estimated cash payments in 2026 | $ 968 |  |
Impairment, long-lived asset, held-for-use, before-tax, statement of income or comprehensive income [Extensible Enumeration] | Depreciation and depletion (includes impairments), Exploration expenses, including dry holes |  |
Sakhalin -1 [Member] |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment, long-lived asset, held-for-use, before-tax |  |  | $ 4,500
Other Upstream |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment, long-lived asset, held-for-use, before-tax |  | 300 | 1,500
Chemical Products |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment, long-lived asset, held-for-use, before-tax |  | 300 |
Energy Products |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment, long-lived asset, held-for-use, before-tax |  |  | $ 400
Specialty Products |  |  |
Property, Plant and Equipment [Line Items] |  |  |
Impairment, long-lived asset, held-for-use, before-tax |  | $ 100 |

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- Definition Noncurrent portion of the carrying amount of a liability for an asset retirement obligation. An asset retirement obligation is a legal obligation associated with the disposal or retirement of a tangible long-lived asset that results from the acquisition, construction or development, or the normal operations of a long-lived asset, except for certain obligations of lessees. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 410 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147481850/410-20-50-1 + Details
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