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Long-Term Debt - Deferred Financing Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Debt Disclosure [Abstract]
Amortization of deferred financing costs reported as interest expense and other financing costs	$ 4.8	$ 3.6	$ 2.8

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- Definition

The component of interest expense comprised of the periodic charge against earnings over the life of the financing arrangement to which such costs relate and the amortization of the debt discount associated with related debt instruments.

+ References

No definition available.

+ Details

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