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Cost Classifications (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2012 | Sep. 30, 2011 | Sep. 30, 2012 | Sep. 30, 2011
Cost Classifications |  |  |  |
Depreciation and amortization not included in cost of product sold | $ 1.0 | $ 0.6 | $ 2.6 | $ 1.9
Depreciation and amortization not included in direct operating expenses | 31.6 | 21.0 | 93.1 | 62.8
Depreciation and amortization not included in selling, general and administrative expenses | $ 0.5 | $ 0.4 | $ 1.7 | $ 1.4

X
- Definition Represents the amount of depreciation and amortization not included in cost of product sold. + References No definition available. + Details
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Namespace Prefix: | cvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of depreciation and amortization not included in direct operating expenses. + References No definition available. + Details
Name: | cvi_DepreciationAndAmortizationNotIncludedInDirectOperatingExpenses
Namespace Prefix: | cvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Represents the amount of depreciation and amortization not included in selling, general and administrative expenses. + References No definition available. + Details
Name: | cvi_DepreciationAndAmortizationNotIncludedInSellingGeneralAndAdministrativeExpenses
Namespace Prefix: | cvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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