Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2025	Mar. 31, 2024
Revenue by Segment
Revenues	[1]	$ 30,258	$ 31,759
Refining [Member]
Revenue by Segment
Revenues		28,757	30,143
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		12,374	13,126
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		13,376	14,128
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		3,007	2,889
Renewable Diesel [Member]
Revenue by Segment
Revenues		493	702
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		391	679
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		39	23
Renewable Diesel [Member] | Neat SAF [Member]
Revenue by Segment
Revenues		63	0
Ethanol [Member]
Revenue by Segment
Revenues		1,008	914
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		787	638
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 221	$ 276

[1] Includes excise taxes on sales by certain of our foreign operations of $1,504 million and $1,387 million for the three months ended March 31, 2025 and 2024, respectively.