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Summary of Significant Accounting Policies - Impairment of Long-Lived Assets (Details)	3 Months Ended	12 Months Ended
	Jun. 30, 2020 product	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Goodwill [Line Items]
Goodwill		$ 0
Goodwill impairment		$ 41,000,000	$ 0	$ 0
Coffeyville reporting unit, percentage of fair value in excess of carrying value				36.00%
Nitrogen Fertilizer
Goodwill [Line Items]
Goodwill			$ 41,000,000
Number of primary products experiencing significant pricing declines | product	2

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Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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