Revenues and Segment Information, Disaggregation of Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Revenue by Segment
Revenues	[1]	$ 38,404	$ 44,454	$ 109,352	$ 134,637
Refining [Member]
Revenue by Segment
Revenues		36,521	42,280	102,924	128,588
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		17,025	17,862	47,302	54,026
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		16,392	20,481	47,222	62,352
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		3,104	3,937	8,400	12,210
Renewable Diesel [Member]
Revenue by Segment
Revenues		759	967	2,990	2,417
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		739	899	2,864	2,311
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		20	68	126	106
Ethanol [Member]
Revenue by Segment
Revenues		1,124	1,207	3,438	3,632
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		861	966	2,522	2,820
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 263	$ 241	$ 916	$ 812

[1] Includes excise taxes on sales by certain of our foreign operations of $1,468 million and $1,213 million for the three months ended September 30, 2023 and 2022, respectively, and $4,339 million and $3,890 million for the nine months ended September 30, 2023 and 2022, respectively.