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Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Energy
Segment Reporting
Disaggregated revenue	$ 1,945	$ 1,834	$ 5,352	$ 5,663
Automotive
Segment Reporting
Disaggregated revenue	366	359	1,056	1,096
Lease revenue outside the scope of ASC 606	8	15	30	45
Total Automotive net sales and other revenues from operations	374	374	1,086	1,141
Petroleum products | Energy
Segment Reporting
Disaggregated revenue	1,736	1,645	4,769	5,155
Renewable products | Energy
Segment Reporting
Disaggregated revenue	45	65	109	123
Nitrogen fertilizer products | Energy
Segment Reporting
Disaggregated revenue	164	124	474	385
Automotive Services | Automotive
Segment Reporting
Disaggregated revenue	$ 366	355	1,054	1,074
Aftermarket Parts | Automotive
Segment Reporting
Disaggregated revenue		$ 4	$ 2	$ 22

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