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Summary of Significant Accounting Policies (Details 2) (USD $) In Millions, unless otherwise specified | 12 Months Ended
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Dec. 31, 2012 M
Property, Plant, and Equipment |
Minimum project cost required for capitalization of interest | $ 1.0
Minimum period required for completion of project for capitalization of interest (in months) | 6
Improvements to land |
Property, Plant, and Equipment |
Useful life, low end of range (in years) | 15
Useful life, high end of range (in years) | 30
Buildings |
Property, Plant, and Equipment |
Useful life, low end of range (in years) | 20
Useful life, high end of range (in years) | 30
Machinery and equipment |
Property, Plant, and Equipment |
Useful life, low end of range (in years) | 5
Useful life, high end of range (in years) | 30
Automotive equipment |
Property, Plant, and Equipment |
Useful life, low end of range (in years) | 5
Useful life, high end of range (in years) | 15
Furniture and fixtures |
Property, Plant, and Equipment |
Useful life, low end of range (in years) | 3
Useful life, high end of range (in years) | 10
Railcars |
Property, Plant, and Equipment |
Useful life, low end of range (in years) | 25
Useful life, high end of range (in years) | 40

X
- Definition Represents the minimum period required for completion of project for capitalization of interest to project cost. + References No definition available. + Details
Name: | cvi_MinimumPeriodForCompletionOfProjectRequiredForCapitalizationOfInterest
Namespace Prefix: | cvi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum amount of project cost required for capitalization of interest to project cost. + References No definition available. + Details
Name: | cvi_MinimumProjectCostRequiredForCapitalizationOfInterest
Namespace Prefix: | cvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Details
Name: | us-gaap_PropertyPlantAndEquipmentLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The maximum useful life of long-lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLifeMaximum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration

X
- Definition The minimum useful life of long lived, physical assets used in the normal conduct of business and not intended for resale. Examples include land, buildings, machinery and equipment, and other types of furniture and equipment including, but not limited to, office equipment, furniture and fixtures, and computer equipment and software. + References No definition available. + Details
Name: | us-gaap_PropertyPlantAndEquipmentUsefulLifeMinimum
Namespace Prefix: | us-gaap_
Data Type: | xbrli:decimalItemType
Balance Type: | na
Period Type: | duration