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Summary of Significant Accounting Policies (Details 3) (USD $) In Millions, unless otherwise specified	12 Months Ended			3 Months Ended
	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012 phase
Cost Classifications
Depreciation and amortization not included in cost of product sold	$ 6.3cvi_DepreciationAndAmortizationNotIncludedInCostOfProductSold	$ 5.0cvi_DepreciationAndAmortizationNotIncludedInCostOfProductSold	$ 3.7cvi_DepreciationAndAmortizationNotIncludedInCostOfProductSold
Depreciation and amortization not included in direct operating expenses	141.8cvi_DepreciationAndAmortizationNotIncludedInDirectOperatingExpenses	134.5cvi_DepreciationAndAmortizationNotIncludedInDirectOperatingExpenses	124.1cvi_DepreciationAndAmortizationNotIncludedInDirectOperatingExpenses
Depreciation and amortization not included in selling, general and administrative expenses	6.3cvi_DepreciationAndAmortizationNotIncludedInSellingGeneralAndAdministrativeExpenses	3.3cvi_DepreciationAndAmortizationNotIncludedInSellingGeneralAndAdministrativeExpenses	2.2cvi_DepreciationAndAmortizationNotIncludedInSellingGeneralAndAdministrativeExpenses
Revenue Recognition
Expected period of delivery of deferred revenue	12 months
Nitrogen fertilizer plant
Planned Major Maintenance Costs
Planned major maintenance activities cost			4.8cvi_PlannedMajorMaintenanceActivitiesCost / cvi_MajorMaintenanceActivitiesByFacilityAxis = cvi_NitrogenFertilizerPlantMember
Nitrogen fertilizer plant | Minimum
Planned Major Maintenance Costs
Frequency of planned major maintenance activities	2 years
Nitrogen fertilizer plant | Maximum
Planned Major Maintenance Costs
Frequency of planned major maintenance activities	3 years
Petroleum refineries | Minimum
Planned Major Maintenance Costs
Frequency of planned major maintenance activities	4 years
Petroleum refineries | Maximum
Planned Major Maintenance Costs
Frequency of planned major maintenance activities	5 years
Coffeyville refinery
Planned Major Maintenance Costs
Planned major maintenance activities cost	5.5cvi_PlannedMajorMaintenanceActivitiesCost / cvi_MajorMaintenanceActivitiesByFacilityAxis = cvi_CoffeyvilleRefineryMember		21.2cvi_PlannedMajorMaintenanceActivitiesCost / cvi_MajorMaintenanceActivitiesByFacilityAxis = cvi_CoffeyvilleRefineryMember
Number of phases				2cvi_PlannedMajorMaintenanceActivitiesNumberOfPhases / cvi_MajorMaintenanceActivitiesByFacilityAxis = cvi_CoffeyvilleRefineryMember
Wynnewood refinery
Planned Major Maintenance Costs
Planned major maintenance activities cost			102.5cvi_PlannedMajorMaintenanceActivitiesCost / cvi_MajorMaintenanceActivitiesByFacilityAxis = cvi_WynnewoodRefineryMember
Fluid Catalytic Cracking Unit Outage | Wynnewood refinery
Planned Major Maintenance Costs
Planned major maintenance activities cost	$ 1.3cvi_PlannedMajorMaintenanceActivitiesCost / cvi_MajorMaintenanceActivitiesByFacilityAxis = cvi_WynnewoodRefineryMember / us-gaap_UnusualOrInfrequentItemAxis = cvi_FluidCatalyticCrackingUnitOutageMember

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