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Change of Control (Details) (IEP, USD $)	12 Months Ended
	Dec. 31, 2014	Apr. 18, 2012 contingent_cash_payment
IEP
Change of Control
Price per share		$ 30cvi_OfferPricePerShareOnRestrictedStockAwardsVested / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Number of non-transferable contingent cash payments right for each Share (in shares)		1cvi_NumberofNonTransferableContingentCashPaymentsRightforEachShare / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember
Ownership percentage held by controlling stockholder	82.00%cvi_MajorityShareholderOwnershipPercentage / us-gaap_RelatedPartyTransactionsByRelatedPartyAxis = us-gaap_MajorityShareholderMember

X

- Definition

Represents the percentage of ownership interest held by the majority shareholder

+ References

No definition available.

+ Details

Name:	cvi_MajorityShareholderOwnershipPercentage
Namespace Prefix:	cvi_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Represents the number of non-transferable contingent cash payment rights for each share of parent company.

+ References

No definition available.

+ Details

Name:	cvi_NumberofNonTransferableContingentCashPaymentsRightforEachShare
Namespace Prefix:	cvi_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	instant

X

- Definition

Represents the offer price per share on restricted stock awards vested as a result of the Transaction Agreement and change in control at the parent company.

+ References

No definition available.

+ Details

Name:	cvi_OfferPricePerShareOnRestrictedStockAwardsVested
Namespace Prefix:	cvi_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

X

- Details

Name:	cvi_ScheduleOfChangeInControlLineItems
Namespace Prefix:	cvi_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration