Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Energy
Segment Reporting
Disaggregated revenue	$ 7,162	$ 7,610	$ 9,247
Automotive
Segment Reporting
Disaggregated revenue	1,401	1,445	1,685
Lease revenue outside the scope of ASC 606	35	60	56
Total Automotive net sales and other revenues from operations	1,436	1,505	1,741
Petroleum products | Energy
Segment Reporting
Disaggregated revenue	6,416	6,909	8,267
Renewable products | Energy
Segment Reporting
Disaggregated revenue	141	177	299
Nitrogen fertilizer products | Energy
Segment Reporting
Disaggregated revenue	605	524	681
Automotive Services | Automotive
Segment Reporting
Disaggregated revenue	1,399	1,420	1,548
Aftermarket Parts | Automotive
Segment Reporting
Disaggregated revenue	$ 2	$ 25	$ 137