Revenues and Segment Information, Components of Operating Income (Loss) (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) segment	Sep. 30, 2022 USD ($)
Segment Information for our Reportable Segments
Revenues	[1]	$ 38,404	$ 44,454	$ 109,352	$ 134,637
Cost of sales:
Cost of materials and other	[2]	32,385	38,064	91,820	115,959
Operating expenses (excluding depreciation and amortization expense reflected below)		1,578	1,746	4,495	4,751
Depreciation and amortization expense		671	621	1,979	1,806
Total cost of sales		34,634	40,431	98,294	122,516
Other operating expenses		6	6	18	40
General and administrative expenses (excluding depreciation and amortization expense reflected below)		250	214	703	652
Depreciation and amortization expense		11	11	32	34
Operating income		3,503	3,792	$ 10,305	11,395
Segment Information (Textual)
Number of reportable segments | segment				3
Corporate, Reconciling Items And Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		(990)	(696)	$ (3,165)	(2,021)
Cost of sales:
Operating income		(262)	(231)	(760)	(694)
Corporate [Member]
Segment Information for our Reportable Segments
Revenues		0	0	0	0
Cost of sales:
General and administrative expenses (excluding depreciation and amortization expense reflected below)		250	214	703	652
Depreciation and amortization expense		11	11	32	34
Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		(990)	(696)	(3,165)	(2,021)
Cost of sales:
Cost of materials and other	[2]	(991)	(689)	(3,143)	(2,011)
Operating expenses (excluding depreciation and amortization expense reflected below)		3	(1)	6	(2)
Depreciation and amortization expense		(1)	0	(3)	0
Total cost of sales		(989)	(690)	(3,140)	(2,013)
Other operating expenses		0	0	0	0
Refining [Member]
Segment Information for our Reportable Segments
Revenues		36,521	42,280	102,924	128,588
Refining [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Revenues		36,529	42,289	102,932	128,612
Cost of sales:
Cost of materials and other	[2]	31,115	36,389	87,398	111,308
Operating expenses (excluding depreciation and amortization expense reflected below)		1,366	1,516	3,832	4,111
Depreciation and amortization expense		597	568	1,751	1,682
Total cost of sales		33,078	38,473	92,981	117,101
Other operating expenses		6	6	17	38
General and administrative expenses (excluding depreciation and amortization expense reflected below)		0	0	0	0
Depreciation and amortization expense		0	0	0	0
Operating income		3,445	3,810	9,934	11,473
Refining [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		8	9	8	24
Renewable Diesel [Member]
Segment Information for our Reportable Segments
Revenues		759	967	2,990	2,417
Renewable Diesel [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Revenues		1,431	1,475	5,357	3,907
Cost of sales:
Cost of materials and other	[2]	1,169	1,161	4,143	3,129
Operating expenses (excluding depreciation and amortization expense reflected below)		84	69	274	178
Depreciation and amortization expense		55	33	172	87
Total cost of sales		1,308	1,263	4,589	3,394
Other operating expenses		0	0	0	0
General and administrative expenses (excluding depreciation and amortization expense reflected below)		0	0	0	0
Depreciation and amortization expense		0	0	0	0
Operating income		123	212	768	513
Segment Information (Textual)
Blender's tax credit		266	191	900	545
Renewable Diesel [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		672	508	2,367	1,490
Ethanol [Member]
Segment Information for our Reportable Segments
Revenues		1,124	1,207	3,438	3,632
Ethanol [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Revenues		1,434	1,386	4,228	4,139
Cost of sales:
Cost of materials and other	[2]	1,092	1,203	3,422	3,533
Operating expenses (excluding depreciation and amortization expense reflected below)		125	162	383	464
Depreciation and amortization expense		20	20	59	37
Total cost of sales		1,237	1,385	3,864	4,034
Other operating expenses		0	0	1	2
General and administrative expenses (excluding depreciation and amortization expense reflected below)		0	0	0	0
Depreciation and amortization expense		0	0	0	0
Operating income		197	1	363	103
Ethanol [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		$ 310	$ 179	$ 790	$ 507

[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.

[2] Cost of materials and other for our Renewable Diesel segment is net of the blender’s tax credit on qualified fuel mixtures of $266 million and $191 million for the three months ended September 30, 2023 and 2022, respectively, and $900 million and $545 million for the nine months ended September 30, 2023 and 2022, respectively.