Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022
Revenue by Segment
Revenues	[1]	$ 34,509	$ 51,641	$ 70,948	$ 90,183
Refining [Member]
Revenue by Segment
Revenues		31,996	49,495	66,403	86,308
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		15,229	20,604	30,277	36,164
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		13,992	24,427	30,830	41,871
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		2,775	4,464	5,296	8,273
Renewable Diesel [Member]
Revenue by Segment
Revenues		1,296	855	2,231	1,450
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		1,249	817	2,125	1,412
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		47	38	106	38
Ethanol [Member]
Revenue by Segment
Revenues		1,217	1,291	2,314	2,425
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		898	979	1,661	1,854
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 319	$ 312	$ 653	$ 571

[1] Includes excise taxes on sales by certain of our foreign operations of $1,449 million and $1,254 million for the three months ended June 30, 2023 and 2022, respectively, and $2,871 million and $2,677 million for the six months ended June 30, 2023 and 2022, respectively.