Property, Plant And Equipment And Asset Retirement Obligations (Property, Plant And Equipment) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Line Items]
Property, plant and equipment, cost	$ 553,903	$ 487,385
Property, plant and equipment, net	294,318	214,940	$ 204,692
Upstream
Property, Plant and Equipment [Line Items]
Property, plant and equipment, cost	423,038	359,031
Property, plant and equipment, net	226,021	148,245
Energy Products
Property, Plant and Equipment [Line Items]
Property, plant and equipment, cost	58,259	57,400
Property, plant and equipment, net	28,349	27,284
Chemical Products
Property, Plant and Equipment [Line Items]
Property, plant and equipment, cost	39,224	38,801
Property, plant and equipment, net	19,973	20,329
Specialty Products
Property, Plant and Equipment [Line Items]
Property, plant and equipment, cost	9,559	9,385
Property, plant and equipment, net	4,229	4,378
Other
Property, Plant and Equipment [Line Items]
Property, plant and equipment, cost	23,823	22,768
Property, plant and equipment, net	$ 15,746	$ 14,704