Revenues and Segment Information, Revenue by Product (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2026	Sep. 30, 2025	Sep. 30, 2026	Sep. 30, 2025
Revenue by Segment
Revenues	[1]	$ 46,098	$ 32,168	$ 122,955	$ 92,315
Refining [Member]
Revenue by Segment
Revenues		44,369	30,414	117,474	87,495
Refining [Member] | Gasoline and Blendstocks [Member]
Revenue by Segment
Revenues		17,932	13,287	47,780	38,382
Refining [Member] | Distillates [Member]
Revenue by Segment
Revenues		22,003	14,582	58,152	40,736
Refining [Member] | Other Product Revenues [Member]
Revenue by Segment
Revenues		4,434	2,545	11,542	8,377
Renewable Diesel [Member]
Revenue by Segment
Revenues		664	719	2,551	1,777
Renewable Diesel [Member] | Renewable Diesel [Member]
Revenue by Segment
Revenues		433	623	2,056	1,484
Renewable Diesel [Member] | Renewable Naphtha [Member]
Revenue by Segment
Revenues		61	29	137	114
Renewable Diesel [Member] | Neat SAF [Member]
Revenue by Segment
Revenues		170	67	358	179
Ethanol [Member]
Revenue by Segment
Revenues		1,065	1,035	2,930	3,043
Ethanol [Member] | Ethanol [Member]
Revenue by Segment
Revenues		848	823	2,313	2,390
Ethanol [Member] | Distillers Grains [Member]
Revenue by Segment
Revenues		$ 217	$ 212	$ 617	$ 653

[1] Includes excise taxes on sales by certain of our foreign operations of $1,658 million and $1,827 million for the three months ended September 30, 2026 and 2025, respectively, and $5,043 million and $4,993 million for the nine months ended September 30, 2026 and 2025, respectively.