Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2023	Mar. 31, 2022
Revenue by Segment
Revenues	[1]	$ 36,439	$ 38,542
Refining [Member]
Revenue by Segment
Revenues		34,407	36,813
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		15,048	15,560
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		16,838	17,444
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		2,521	3,809
Renewable Diesel [Member]
Revenue by Segment
Revenues		935	595
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		876	595
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		59	0
Ethanol [Member]
Revenue by Segment
Revenues		1,097	1,134
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		763	875
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 334	$ 259

[1] Includes excise taxes on sales by certain of our foreign operations of $1,422 million and $1,423 million for the three months ended March 31, 2023 and 2022, respectively.