Revenues and Segment Information, Components of Operating Income (Loss) (Details) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Sep. 30, 2024 USD ($) segment	Sep. 30, 2023 USD ($)
Segment Information for our Reportable Segments
Revenues	[1]	$ 32,876	$ 38,404	$ 99,125	$ 109,352
Cost of sales:
Cost of materials and other	[2]	29,965	32,385	88,590	91,820
Operating expenses (excluding depreciation and amortization expense reflected below)		1,482	1,578	4,317	4,495
Depreciation and amortization expense		675	671	2,042	1,979
Total cost of sales		32,122	34,634	94,949	98,294
Other operating expenses		3	6	40	18
General and administrative expenses (excluding depreciation and amortization expense reflected below)		234	250	695	703
Depreciation and amortization expense		10	11	34	32
Operating income		507	3,503	3,407	10,305
Other income, net		123	122	389	357
Interest and debt expense, net of capitalized interest		(141)	(149)	(421)	(443)
Income before income tax expense		489	3,476	$ 3,375	10,219
Segment Information (Textual)
Number of reportable segments | segment				3
Corporate and Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		(831)	(990)	$ (2,594)	(3,165)
Cost of sales:
Operating income		(246)	(262)	(732)	(760)
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)		234	250	695	703
Depreciation and amortization expense		10	11	34	32
Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		(831)	(990)	(2,594)	(3,165)
Cost of sales:
Cost of materials and other	[2]	(828)	(991)	(2,588)	(3,143)
Operating expenses (excluding depreciation and amortization expense reflected below)		1	3	1	6
Depreciation and amortization expense		(2)	(1)	(4)	(3)
Total cost of sales		(829)	(989)	(2,591)	(3,140)
Other operating expenses		0	0	0	0
Refining [Member]
Segment Information for our Reportable Segments
Revenues		31,332	36,521	94,519	102,924
Refining [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Revenues		31,335	36,529	94,527	102,932
Cost of sales:
Cost of materials and other	[2]	28,922	31,115	85,528	87,398
Operating expenses (excluding depreciation and amortization expense reflected below)		1,256	1,366	3,659	3,832
Depreciation and amortization expense		589	597	1,793	1,751
Total cost of sales		30,767	33,078	90,980	92,981
Other operating expenses		3	6	13	17
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		565	3,445	3,534	9,934
Refining [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		3	8	8	8
Renewable Diesel [Member]
Segment Information for our Reportable Segments
Revenues		632	759	1,888	2,990
Renewable Diesel [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Revenues		1,225	1,431	3,820	5,357
Cost of sales:
Cost of materials and other	[2]	1,029	1,169	3,025	4,143
Operating expenses (excluding depreciation and amortization expense reflected below)		92	84	262	274
Depreciation and amortization expense		69	55	196	172
Total cost of sales		1,190	1,308	3,483	4,589
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		35	123	337	768
Segment Information (Textual)
Blender's tax credit		313	266	952	900
Renewable Diesel [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		593	672	1,932	2,367
Ethanol [Member]
Segment Information for our Reportable Segments
Revenues		912	1,124	2,718	3,438
Ethanol [Member] | Operating Segments [Member]
Segment Information for our Reportable Segments
Revenues		1,147	1,434	3,372	4,228
Cost of sales:
Cost of materials and other	[2]	842	1,092	2,625	3,422
Operating expenses (excluding depreciation and amortization expense reflected below)		133	125	395	383
Depreciation and amortization expense		19	20	57	59
Total cost of sales		994	1,237	3,077	3,864
Other operating expenses		0	0	27	1
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		153	197	268	363
Ethanol [Member] | Intersegment Eliminations [Member]
Segment Information for our Reportable Segments
Revenues		$ 235	$ 310	$ 654	$ 790

[1] Includes excise taxes on sales by certain of our foreign operations of $1,539 million and $1,468 million for the three months ended September 30, 2024 and 2023, respectively, and $4,382 million and $4,339 million for the nine months ended September 30, 2024 and 2023, 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 $313 million and $266 million for the three months ended September 30, 2024 and 2023, respectively, and $952 million and $900 million for the nine months ended September 30, 2024 and 2023, respectively.