Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Revenue by Segment
Revenues	[1]	$ 29,889	$ 34,490	$ 60,147	$ 66,249
Refining [Member]
Revenue by Segment
Revenues		28,324	33,044	57,081	63,187
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		12,721	15,517	25,095	28,643
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		12,778	14,303	26,154	28,431
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		2,825	3,224	5,832	6,113
Renewable Diesel [Member]
Revenue by Segment
Revenues		565	554	1,058	1,256
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		470	540	861	1,219
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		46	14	85	37
Renewable Diesel [Member] | Neat SAF [Member]
Revenue by Segment
Revenues		49	0	112	0
Ethanol [Member]
Revenue by Segment
Revenues		1,000	892	2,008	1,806
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		780	662	1,567	1,300
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 220	$ 230	$ 441	$ 506

[1] Includes excise taxes on sales by certain of our foreign operations of $1,662 million and $1,456 million for the three months ended June 30, 2025 and 2024, respectively, and $3,166 million and $2,843 million for the six months ended June 30, 2025 and 2024, respectively.