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Business Segments (Details 2) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 12 Months Ended
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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
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales | $ 1,841.8 us-gaap_SalesRevenueGoodsNet | $ 2,279.9 us-gaap_SalesRevenueGoodsNet | $ 2,540.3 us-gaap_SalesRevenueGoodsNet | $ 2,447.4 us-gaap_SalesRevenueGoodsNet | $ 2,436.0 us-gaap_SalesRevenueGoodsNet | $ 1,977.1 us-gaap_SalesRevenueGoodsNet | $ 2,220.3 us-gaap_SalesRevenueGoodsNet | $ 2,352.4 us-gaap_SalesRevenueGoodsNet | $ 9,109.5 us-gaap_SalesRevenueGoodsNet | $ 8,985.8 us-gaap_SalesRevenueGoodsNet | $ 8,567.3 us-gaap_SalesRevenueGoodsNet
Cost of product sold (exclusive of depreciation and amortization) | 1,733.4 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 2,066.7 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 2,189.0 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 2,076.9 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 2,219.7 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 1,744.4 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 1,785.4 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 1,813.6 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 8,066.0 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 7,563.2 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization | 6,696.9 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization
Direct operating expenses (exclusive of depreciation and amortization) | 134.7 us-gaap_DirectOperatingCosts | 136.8 us-gaap_DirectOperatingCosts | 120.1 us-gaap_DirectOperatingCosts | 123.4 us-gaap_DirectOperatingCosts | 110.6 us-gaap_DirectOperatingCosts | 128.4 us-gaap_DirectOperatingCosts | 108.3 us-gaap_DirectOperatingCosts | 108.5 us-gaap_DirectOperatingCosts | 515.1 us-gaap_DirectOperatingCosts | 455.8 us-gaap_DirectOperatingCosts | 522.1 us-gaap_DirectOperatingCosts
Depreciation and amortization | 40.8 us-gaap_DepreciationDepletionAndAmortization | 37.8 us-gaap_DepreciationDepletionAndAmortization | 38.6 us-gaap_DepreciationDepletionAndAmortization | 37.3 us-gaap_DepreciationDepletionAndAmortization | 37.4 us-gaap_DepreciationDepletionAndAmortization | 36.2 us-gaap_DepreciationDepletionAndAmortization | 35.0 us-gaap_DepreciationDepletionAndAmortization | 34.2 us-gaap_DepreciationDepletionAndAmortization | 154.4 us-gaap_DepreciationDepletionAndAmortization | 142.8 us-gaap_DepreciationDepletionAndAmortization | 130.0 us-gaap_DepreciationDepletionAndAmortization
Operating income | (90.6)us-gaap_OperatingIncomeLoss | 6.8 us-gaap_OperatingIncomeLoss | 164.6 us-gaap_OperatingIncomeLoss | 183.5 us-gaap_OperatingIncomeLoss | 39.7 us-gaap_OperatingIncomeLoss | 40.4 us-gaap_OperatingIncomeLoss | 262.7 us-gaap_OperatingIncomeLoss | 367.7 us-gaap_OperatingIncomeLoss | 264.3 us-gaap_OperatingIncomeLoss | 710.5 us-gaap_OperatingIncomeLoss | 1,034.9 us-gaap_OperatingIncomeLoss
Capital expenditures |  |  |  |  |  |  |  |  | 218.4 us-gaap_PaymentsToAcquireProductiveAssets | 256.5 us-gaap_PaymentsToAcquireProductiveAssets | 212.2 us-gaap_PaymentsToAcquireProductiveAssets
Total assets | 3,462.5 us-gaap_Assets |  |  |  | 3,665.8 us-gaap_Assets |  |  |  | 3,462.5 us-gaap_Assets | 3,665.8 us-gaap_Assets | 3,610.9 us-gaap_Assets
Goodwill | 41.0 us-gaap_Goodwill |  |  |  | 41.0 us-gaap_Goodwill |  |  |  | 41.0 us-gaap_Goodwill | 41.0 us-gaap_Goodwill | 41.0 us-gaap_Goodwill
Petroleum |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 8,829.7 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 8,683.5 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 8,281.5 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Cost of product sold (exclusive of depreciation and amortization) |  |  |  |  |  |  |  |  | 8,013.4 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 7,526.7 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 6,667.3 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Direct operating expenses (exclusive of depreciation and amortization) |  |  |  |  |  |  |  |  | 416.0 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 361.7 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 426.5 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 122.5 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 114.3 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 107.6 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Operating income |  |  |  |  |  |  |  |  | 207.2 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 603.0 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 1,012.5 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Capital expenditures |  |  |  |  |  |  |  |  | 191.3 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 204.5 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 120.0 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Total assets | 2,417.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember |  |  |  | 2,533.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember |  |  |  | 2,417.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 2,533.3 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 2,258.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Goodwill | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember |  |  |  | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember |  |  |  | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember | 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Nitrogen Fertilizer |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | 298.7 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 323.7 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 302.3 us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Cost of product sold (exclusive of depreciation and amortization) |  |  |  |  |  |  |  |  | 72.0 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 58.1 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 46.1 us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Direct operating expenses (exclusive of depreciation and amortization) |  |  |  |  |  |  |  |  | 98.9 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 94.1 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 95.6 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 27.3 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 25.6 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 20.7 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Operating income |  |  |  |  |  |  |  |  | 82.8 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 124.9 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 115.8 us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Capital expenditures |  |  |  |  |  |  |  |  | 21.1 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 43.8 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 82.2 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Total assets | 578.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember |  |  |  | 593.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember |  |  |  | 578.8 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 593.5 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 623.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Goodwill | 41.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember |  |  |  | 41.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember |  |  |  | 41.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 41.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember | 41.0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Intersegment elimination |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Net sales |  |  |  |  |  |  |  |  | (18.9)us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (21.4)us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (16.5)us-gaap_SalesRevenueGoodsNet / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Cost of product sold (exclusive of depreciation and amortization) |  |  |  |  |  |  |  |  | (19.4)us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (21.6)us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember | (16.5)us-gaap_CostOfGoodsSoldExcludingDepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_IntersegmentEliminationMember
Other |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |
Direct operating expenses (exclusive of depreciation and amortization) |  |  |  |  |  |  |  |  | 0.2 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 0 us-gaap_DirectOperatingCosts / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Depreciation and amortization |  |  |  |  |  |  |  |  | 4.6 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 2.9 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 1.7 us-gaap_DepreciationDepletionAndAmortization / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Operating income |  |  |  |  |  |  |  |  | (25.7)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (17.4)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | (93.4)us-gaap_OperatingIncomeLoss / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Capital expenditures |  |  |  |  |  |  |  |  | 6.0 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 8.2 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 10.0 us-gaap_PaymentsToAcquireProductiveAssets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Total assets | 465.9 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | 539.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | 465.9 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 539.0 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | 729.4 us-gaap_Assets / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember
Goodwill | $ 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | $ 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember |  |  |  | $ 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | $ 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember | $ 0 us-gaap_Goodwill / us-gaap_StatementBusinessSegmentsAxis = us-gaap_AllOtherSegmentsMember

X
- Definition Sum of the carrying amounts as of the balance sheet date of all assets that are recognized. Assets are probable future economic benefits obtained or controlled by an entity as a result of past transactions or events. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.18) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 12 -Article 7 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 18 -Article 5 + Details
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