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Commitments and Contingencies (Details 8) (USD $) In Millions, unless otherwise specified | 12 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013
Loss Contingencies [Line Items] |  |
Minimum ownership interest in company | 80.00%cvi_MajorityShareholderOwnershipPercentageMinimum |
Affiliate Pension Obligations |  |
Loss Contingencies [Line Items] |  |
Aggregate underfunded pension obligation if pension plans voluntarily terminated by affiliate | 473.8 cvi_UnderfundedPensionObligationIfPensionPlansVoluntarilyTerminatedByAffiliate / us-gaap_LossContingenciesByNatureOfContingencyAxis = cvi_AffiliatePensionObligationsMember | $ 591.8 cvi_UnderfundedPensionObligationIfPensionPlansVoluntarilyTerminatedByAffiliate / us-gaap_LossContingenciesByNatureOfContingencyAxis = cvi_AffiliatePensionObligationsMember
IEP |  |
Loss Contingencies [Line Items] |  |
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 percentage of ownership interest in CVR Energy by Mr. Icahn's affiliates. + References No definition available. + Details
Name: | cvi_MajorityShareholderOwnershipPercentageMinimum
Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Represents the underfunded pension obligation of affiliates for which the Company is joint and severally liable. + References No definition available. + Details
Name: | cvi_UnderfundedPensionObligationIfPensionPlansVoluntarilyTerminatedByAffiliate
Namespace Prefix: | cvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_LossContingenciesLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=cvi_AffiliatePensionObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_MajorityShareholderMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |