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Property, Plant and Equipment (PP&E) (Summary of Property, Plant And Equipment) (Detail) - USD ($) $ in Millions | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Property, Plant and Equipment [Line Items] |  |
Gross PP&E | $ 67,494 | $ 66,317
Accumulated Depreciation | 32,689 | 31,289
Net PP&E | 34,805 | 35,028
Operating Segments | Refining & Marketing |  |
Property, Plant and Equipment [Line Items] |  |
Gross PP&E | 33,546 | 32,965
Accumulated Depreciation | 19,752 | 19,015
Net PP&E | 13,794 | 13,950
Operating Segments | Midstream |  |
Property, Plant and Equipment [Line Items] |  |
Gross PP&E | 31,291 | 30,697
Accumulated Depreciation | 11,408 | 10,798
Net PP&E | 19,883 | 19,899
Operating Segments | Renewable Diesel |  |
Property, Plant and Equipment [Line Items] |  |
Gross PP&E | 969 | 976
Accumulated Depreciation | 364 | 338
Net PP&E | 605 | 638
Corporate |  |
Property, Plant and Equipment [Line Items] |  |
Gross PP&E | 1,688 | 1,679
Accumulated Depreciation | 1,165 | 1,138
Net PP&E | $ 523 | $ 541

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- Definition Amount of accumulated depreciation and amortization from plant, property, and equipment and right-of-use asset from finance lease. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 45 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147479041/842-20-45-4 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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- Definition Amount, after accumulated depreciation and amortization, of property, plant, and equipment and finance lease right-of-use asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 360 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482099/360-10-50-1 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (a) -SubTopic 20 -Topic 842 -Publisher FASB -URI https://asc.fasb.org/1943274/2147478964/842-20-50-4 + Details
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