Revenues and Segment Information, Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2026	Mar. 31, 2025
Revenue by Segment
Revenues	[1]	$ 32,381	$ 30,258
Refining [Member]
Revenue by Segment
Revenues		30,805	28,757
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		12,431	12,374
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		15,461	13,376
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		2,913	3,007
Renewable Diesel [Member]
Revenue by Segment
Revenues		711	493
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		566	391
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		37	39
Renewable Diesel [Member] | Neat SAF [Member]
Revenue by Segment
Revenues		108	63
Ethanol [Member]
Revenue by Segment
Revenues		865	1,008
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		676	787
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 189	$ 221

[1] Includes excise taxes on sales by certain of our foreign operations of $1,725 million and $1,504 million for the three months ended March 31, 2026 and 2025, respectively.