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Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Energy
Segment Reporting
Disaggregated revenue	$ 1,761	$ 1,966	$ 3,407	$ 3,829
Automotive Segment
Segment Reporting
Disaggregated revenue	355	368	690	737
Lease revenue outside the scope of ASC 606	8	15	22	30
Total Automotive net sales and other revenues from operations	363	383	712	767
Petroleum products | Energy
Segment Reporting
Disaggregated revenue	1,558	1,792	3,033	3,510
Renewable products | Energy
Segment Reporting
Disaggregated revenue	36	41	64	58
Nitrogen fertilizer products | Energy
Segment Reporting
Disaggregated revenue	167	133	310	261
Automotive Services | Automotive Segment
Segment Reporting
Disaggregated revenue	$ 355	363	688	719
Aftermarket Parts | Automotive Segment
Segment Reporting
Disaggregated revenue		$ 5	$ 2	$ 18

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