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Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Revenue by Segment
Revenues	[1]	$ 34,490	$ 34,509	$ 66,249	$ 70,948
Refining [Member]
Revenue by Segment
Revenues		33,044	31,996	63,187	66,403
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		15,517	15,229	28,643	30,277
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		14,303	13,992	28,431	30,830
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		3,224	2,775	6,113	5,296
Renewable Diesel [Member]
Revenue by Segment
Revenues		554	1,296	1,256	2,231
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		540	1,249	1,219	2,125
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		14	47	37	106
Ethanol [Member]
Revenue by Segment
Revenues		892	1,217	1,806	2,314
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		662	898	1,300	1,661
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 230	$ 319	$ 506	$ 653
[1] Includes excise taxes on sales by certain of our foreign operations of $1,456 million and $1,449 million for the three months ended June 30, 2024 and 2023, respectively, and $2,843 million and $2,871 million for the six months ended June 30, 2024 and 2023, respectively.

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