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Commitments and Contingencies - Supply Commitments (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies Disclosure [Abstract]
Amounts purchased under supply agreements	$ 153	$ 167	$ 214

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- Definition

Represents the expenses associated with long term purchase commitment agreements.

+ References

No definition available.

+ Details

Name:	cvi_LongTermPurchaseCommitmentExpenses
Namespace Prefix:	cvi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_CommitmentsAndContingenciesDisclosureAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration