Segment Reporting - Disaggregation of Revenue (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Energy Segment
Disaggregation of Revenue [Line Items]
Disaggregated revenue	$ 7,242	$ 3,930	$ 6,364
Automotive Segment
Disaggregation of Revenue [Line Items]
Disaggregated revenue	2,384	2,478	2,884
Petroleum products \| Energy Segment
Disaggregation of Revenue [Line Items]
Disaggregated revenue	6,709	3,580	5,960
Nitrogen fertilizer products \| Energy Segment
Disaggregation of Revenue [Line Items]
Disaggregated revenue	533	350	404
Automotive services \| Automotive Segment
Disaggregation of Revenue [Line Items]
Disaggregated revenue	1,377	1,228	1,373
Automotive parts [Member] \| Automotive Segment
Disaggregation of Revenue [Line Items]
Disaggregated revenue	$ 1,007	$ 1,250	$ 1,511

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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Reference 2: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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+ Details