Revenues and Segment Information, Assets (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Total Assets by Reportable Segment
Reportable segment assets	$ 63,175	$ 60,982
Corporate and Eliminations [Member]
Total Assets by Reportable Segment
Reportable segment assets	6,951	5,730
Refining [Member] | Operating Segments [Member]
Total Assets by Reportable Segment
Reportable segment assets	49,171	48,484
Renewable Diesel [Member] | Operating Segments [Member]
Total Assets by Reportable Segment
Reportable segment assets	5,552	5,217
Ethanol [Member] | Operating Segments [Member]
Total Assets by Reportable Segment
Reportable segment assets	$ 1,501	$ 1,551