Sales and Other Operating Revenues - Disaggregated (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	$ 33,323	$ 38,129	$ 63,753	$ 73,940
United States
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	26,022	30,464	50,181	58,841
United Kingdom
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	3,389	3,207	6,351	7,097
Germany
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	1,309	1,370	2,527	2,673
Other countries
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	2,603	3,088	4,694	5,329
Refined petroleum products and renewable fuels
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	24,211	28,071	46,460	53,810
Crude oil resales
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	4,151	5,905	7,253	11,483
Natural gas liquids and natural gas
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	4,076	3,583	8,582	6,917
Services and other
Disaggregation of Revenue [Line Items]
Sales and other operating revenues	$ 885	$ 570	$ 1,458	$ 1,730