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Major Customers and Suppliers (Details)	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Sales | Customer concentration | Petroleum | Customer A
Major Customers and Suppliers
Concentration risk (as a percent)	13.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerAMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	12.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerAMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerAMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Sales | Customer concentration | Nitrogen Fertilizer
Major Customers and Suppliers
Concentration risk (as a percent)	27.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	28.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	20.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Sales | Customer concentration | Nitrogen Fertilizer | Customer B
Major Customers and Suppliers
Concentration risk (as a percent)	17.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerBMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	15.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerBMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerBMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Sales | Customer concentration | Nitrogen Fertilizer | Customer C
Major Customers and Suppliers
Concentration risk (as a percent)	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerCMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	13.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerCMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	10.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_SalesRevenueGoodsNetMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CustomerConcentrationRiskMember / us-gaap_MajorCustomersAxis = cvi_CustomerCMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Contracted volume | Supplier concentration | Petroleum
Major Customers and Suppliers
Number of major suppliers	1cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	1cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	1cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Contracted volume | Supplier concentration | Petroleum | Supplier A
Major Customers and Suppliers
Concentration risk (as a percent)	67.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / cvi_MajorSupplierAxis = cvi_SupplierAMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	69.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / cvi_MajorSupplierAxis = cvi_SupplierAMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	45.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / cvi_MajorSupplierAxis = cvi_SupplierAMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Direct operating expenses (exclusive of depreciation and amortization) | Supplier concentration | Nitrogen Fertilizer
Major Customers and Suppliers
Number of major suppliers	1cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	1cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	1cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Direct operating expenses (exclusive of depreciation and amortization) | Supplier concentration | Nitrogen Fertilizer | Supplier B
Major Customers and Suppliers
Concentration risk (as a percent)	4.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / cvi_MajorSupplierAxis = cvi_SupplierBMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	4.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / cvi_MajorSupplierAxis = cvi_SupplierBMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	5.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / cvi_MajorSupplierAxis = cvi_SupplierBMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember

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- Definition

Represents the number of major suppliers.

+ References

No definition available.

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 18

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6351-108592

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