Revenues and Segment Information, Revenue by Product (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue by Segment
Revenues	[1]	$ 144,766	$ 176,383	$ 113,977
Refining [Member]
Revenue by Segment
Revenues		136,470	168,154	106,947
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		61,538	70,496	49,534
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		63,664	82,521	45,939
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		11,268	15,137	11,474
Renewable Diesel [Member]
Revenue by Segment
Revenues		3,823	3,483	1,874
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		3,665	3,333	1,874
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		158	150	0
Ethanol [Member]
Revenue by Segment
Revenues		4,473	4,746	5,156
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		3,300	3,653	4,122
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 1,173	$ 1,093	$ 1,034

[1] Includes excise taxes on sales by certain of our foreign operations of $5,765 million, $5,194 million, and $5,645 million for the years ended December 31, 2023, 2022, and 2021.