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Major Customers and Suppliers (Details) | 12 Months Ended
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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 | 1 cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 1 cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_ContractedVolumeMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 1 cvi_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 | 1 cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 1 cvi_NumberOfMajorSuppliers / us-gaap_ConcentrationRiskByBenchmarkAxis = cvi_DirectOperatingExpensesExclusiveOfDepreciationAndAmortizationMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_SupplierConcentrationRiskMember / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 1 cvi_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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