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Subsequent Events (Details) (USD $)
In Millions, except Per Share data, unless otherwise specified
3 Months Ended 12 Months Ended 0 Months Ended
Dec. 31, 2014
Sep. 30, 2014
Jun. 30, 2014
Mar. 31, 2014
Dec. 31, 2013
Sep. 30, 2013
Jun. 30, 2013
Mar. 31, 2013
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
Feb. 18, 2015
Dividend                        
Dividends declared per share (in dollars per share) $ 0.75us-gaap_CommonStockDividendsPerShareDeclared $ 2.75us-gaap_CommonStockDividendsPerShareDeclared $ 0.75us-gaap_CommonStockDividendsPerShareDeclared $ 0.75us-gaap_CommonStockDividendsPerShareDeclared $ 0.75us-gaap_CommonStockDividendsPerShareDeclared $ 0.75us-gaap_CommonStockDividendsPerShareDeclared $ 7.25us-gaap_CommonStockDividendsPerShareDeclared $ 5.50us-gaap_CommonStockDividendsPerShareDeclared $ 5.00us-gaap_CommonStockDividendsPerShareDeclared $ 14.25us-gaap_CommonStockDividendsPerShareDeclared $ 0.00us-gaap_CommonStockDividendsPerShareDeclared  
Aggregate dividends declared                 $ 434.2us-gaap_DividendsCommonStockCash $ 1,237.3us-gaap_DividendsCommonStockCash    
Subsequent event                        
Dividend                        
Dividends declared per share (in dollars per share)                       $ 0.50us-gaap_CommonStockDividendsPerShareDeclared
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Aggregate dividends declared                       43.4us-gaap_DividendsCommonStockCash
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent event | CVR Partners, LP                        
Distribution                        
Cash distribution (in dollars per unit)                       $ 0.41us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit
/ dei_LegalEntityAxis
= cvi_CVRPartnersLPMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Aggregate cash distributions paid                       30.0us-gaap_DistributionMadeToLimitedPartnerCashDistributionsDeclared
/ dei_LegalEntityAxis
= cvi_CVRPartnersLPMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Expected proceeds from declared distributions                       16.0cvi_DistributionMadetoLimitedPartnerExpectedProceedsfromDistribution
/ dei_LegalEntityAxis
= cvi_CVRPartnersLPMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Subsequent event | CVR Refining, LP                        
Distribution                        
Cash distribution (in dollars per unit)                       $ 0.37us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit
/ dei_LegalEntityAxis
= cvi_CVRRefiningLimitedPartnershipMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Aggregate cash distributions paid                       54.6us-gaap_DistributionMadeToLimitedPartnerCashDistributionsDeclared
/ dei_LegalEntityAxis
= cvi_CVRRefiningLimitedPartnershipMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Expected proceeds from declared distributions                       36.0cvi_DistributionMadetoLimitedPartnerExpectedProceedsfromDistribution
/ dei_LegalEntityAxis
= cvi_CVRRefiningLimitedPartnershipMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
IEP                        
Dividend                        
Ownership percentage held by controlling stockholder                 82.00%cvi_MajorityShareholderOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_MajorityShareholderMember
     
IEP | Subsequent event                        
Dividend                        
Aggregate dividends declared                       $ 35.6us-gaap_DividendsCommonStockCash
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_MajorityShareholderMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember
Ownership percentage held by controlling stockholder                       82.00%cvi_MajorityShareholderOwnershipPercentage
/ us-gaap_RelatedPartyTransactionsByRelatedPartyAxis
= us-gaap_MajorityShareholderMember
/ us-gaap_SubsequentEventTypeAxis
= us-gaap_SubsequentEventMember