Revenue - Revenue Disaggregated by Major Product (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Disaggregation of Revenue [Line Items]
Total revenue	$ 3,144	$ 1,783	$ 5,517	$ 3,246
Revenue from product sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	3,132	1,774	5,499	3,208
Gasoline
Disaggregation of Revenue [Line Items]
Revenue from product sales	1,421	908	2,524	1,657
Distillates
Disaggregation of Revenue [Line Items]
Revenue from product sales	1,350	685	2,312	1,273
Ammonia
Disaggregation of Revenue [Line Items]
Revenue from product sales	61	32	103	42
UAN
Disaggregation of Revenue [Line Items]
Revenue from product sales	159	87	319	126
Other urea products
Disaggregation of Revenue [Line Items]
Revenue from product sales	11	7	20	11
Freight revenue
Disaggregation of Revenue [Line Items]
Revenue from product sales	14	14	27	26
Other
Disaggregation of Revenue [Line Items]
Revenue from product sales	116	41	194	73
Crude oil sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	12	8	17	37
Other revenue
Disaggregation of Revenue [Line Items]
Other revenue	0	1	1	1
Operating Segments \| Petroleum Segment
Disaggregation of Revenue [Line Items]
Total revenue	2,868	1,648	5,022	3,052
Operating Segments \| Petroleum Segment \| Revenue from product sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	2,856	1,639	5,004	3,014
Operating Segments \| Petroleum Segment \| Gasoline
Disaggregation of Revenue [Line Items]
Revenue from product sales	1,421	908	2,524	1,657
Operating Segments \| Petroleum Segment \| Distillates
Disaggregation of Revenue [Line Items]
Revenue from product sales	1,350	685	2,312	1,273
Operating Segments \| Petroleum Segment \| Ammonia
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Operating Segments \| Petroleum Segment \| UAN
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Operating Segments \| Petroleum Segment \| Other urea products
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Operating Segments \| Petroleum Segment \| Freight revenue
Disaggregation of Revenue [Line Items]
Revenue from product sales	4	5	8	11
Operating Segments \| Petroleum Segment \| Other
Disaggregation of Revenue [Line Items]
Revenue from product sales	81	41	160	73
Operating Segments \| Petroleum Segment \| Crude oil sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	12	8	17	37
Operating Segments \| Petroleum Segment \| Other revenue
Disaggregation of Revenue [Line Items]
Other revenue	0	1	1	1
Operating Segments \| Nitrogen Fertilizer Segment
Disaggregation of Revenue [Line Items]
Total revenue	244	138	467	199
Operating Segments \| Nitrogen Fertilizer Segment \| Revenue from product sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	244	138	467	199
Operating Segments \| Nitrogen Fertilizer Segment \| Gasoline
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Operating Segments \| Nitrogen Fertilizer Segment \| Distillates
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Operating Segments \| Nitrogen Fertilizer Segment \| Ammonia
Disaggregation of Revenue [Line Items]
Revenue from product sales	61	32	103	42
Operating Segments \| Nitrogen Fertilizer Segment \| UAN
Disaggregation of Revenue [Line Items]
Revenue from product sales	159	87	319	126
Operating Segments \| Nitrogen Fertilizer Segment \| Other urea products
Disaggregation of Revenue [Line Items]
Revenue from product sales	11	7	20	11
Operating Segments \| Nitrogen Fertilizer Segment \| Freight revenue
Disaggregation of Revenue [Line Items]
Revenue from product sales	10	9	19	15
Operating Segments \| Nitrogen Fertilizer Segment \| Other
Disaggregation of Revenue [Line Items]
Revenue from product sales	3	3	6	5
Operating Segments \| Nitrogen Fertilizer Segment \| Crude oil sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Operating Segments \| Nitrogen Fertilizer Segment \| Other revenue
Disaggregation of Revenue [Line Items]
Other revenue	0	0	0	0
Other / Elimination
Disaggregation of Revenue [Line Items]
Total revenue	32	(3)	28	(5)
Other / Elimination \| Revenue from product sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	32	(3)	28	(5)
Other / Elimination \| Gasoline
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Other / Elimination \| Distillates
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Other / Elimination \| Ammonia
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Other / Elimination \| UAN
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Other / Elimination \| Other urea products
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Other / Elimination \| Freight revenue
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Other / Elimination \| Other
Disaggregation of Revenue [Line Items]
Revenue from product sales	32	(3)	28	(5)
Other / Elimination \| Crude oil sales
Disaggregation of Revenue [Line Items]
Revenue from product sales	0	0	0	0
Other / Elimination \| Other revenue
Disaggregation of Revenue [Line Items]
Other revenue	$ 0	$ 0	$ 0	$ 0