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Property, Plant and Equipment - Schedule of Historical Costs of our Property, Plant and Equipment and Related Balances (Details) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2025 | Dec. 31, 2024
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Property, plant and equipment, gross | $ 75,119 | $ 71,203
Less accumulated depreciation | 23,807 | 22,330
Subtotal property, plant and equipment, net | 51,312 | 48,873
Capitalized major maintenance costs for reaction-based plants, net of accumulated amortization | 199 | 189
Property, plant and equipment, net | 51,511 | 49,062
Plants, pipelines and facilities |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Property, plant and equipment, gross | $ 64,078 | 60,716
Plants, pipelines and facilities | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 3 years |
Plants, pipelines and facilities | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 45 years |
Underground and other storage facilities |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Property, plant and equipment, gross | $ 4,792 | 4,704
Underground and other storage facilities | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 5 years |
Underground and other storage facilities | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 40 years |
Transportation equipment |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Property, plant and equipment, gross | $ 290 | 272
Transportation equipment | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 3 years |
Transportation equipment | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 10 years |
Marine vessels |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Property, plant and equipment, gross | $ 953 | 949
Marine vessels | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 15 years |
Marine vessels | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 30 years |
Land |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Property, plant and equipment, gross | $ 425 | 424
Construction in progress |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Property, plant and equipment, gross | $ 4,581 | $ 4,138
Distillation-based and reaction-based plants | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 20 years |
Distillation-based and reaction-based plants | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 35 years |
Pipelines and related equipment | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 5 years |
Pipelines and related equipment | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 45 years |
Terminal facilities | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 10 years |
Terminal facilities | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 35 years |
Buildings | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 20 years |
Buildings | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 40 years |
Office furniture and equipment | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 3 years |
Office furniture and equipment | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 20 years |
Laboratory and shop equipment | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 5 years |
Laboratory and shop equipment | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 35 years |
Underground storage facilities | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 5 years |
Underground storage facilities | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 35 years |
Storage tanks | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 10 years |
Storage tanks | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 40 years |
Water wells | Minimum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 5 years |
Water wells | Maximum |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Estimated Useful Life in Years | 35 years |
Capitalized Major Maintenance | Weighted Average |  |
Property, Plant and Equipment, Net, by Type [Abstract] |  |
Expected remaining amortization period | 2 years 8 months 12 days |

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