Property, Plant, and Equipment (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Property, Plant, and Equipment, Net
Finance lease ROU assets (see Note 5)	$ 3,397	$ 3,348
Property, plant, and equipment, at cost	50,091	52,368
Accumulated depreciation	(22,474)	(23,054)
Property, plant, and equipment, net	27,617	29,314
Property, Plant, and Equipment (Textual)
Depreciation expense	2,300	1,900	$ 1,900
Land [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	509	500
Crude Oil Processing Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	31,542	34,089
Transportation and Terminaling Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	6,201	6,013
Waste And Renewable Feedstocks Processing Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	3,660	3,616
Corn Processing Facilities [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	1,075	1,058
Administrative Buildings [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	1,082	1,147
Other [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	2,008	1,993
Construction in Progress [Member]
Property, Plant, and Equipment, Net
Property, plant, and equipment, at cost	617	$ 604
Benicia Refinery [Member]
Property, Plant, and Equipment (Textual)
Depreciation expense	$ 300