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Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified | Dec. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Basis of Consolidation |  |
Percentage of holders of the outstanding common units required to vote for removal of the general partner | 66.667% |
Cash and Cash Equivalents |  |
Checks issued but not presented to banks | $ 21.3 | $ 13.4
Accounts receivable | Credit concentration | One customer with largest risk concentration |  |
Accounts Receivable, net |  |
Number of customers | 0 |
Customers individually representing greater than this percentage for disclosure | 9.80% | 9.40%

X
- Definition Represents the amount of checks issued but not presented to banks. + References No definition available. + Details
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Namespace Prefix: | cvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the number of customers of the entity with concentration risks that exceed the disclosure threshold. + References No definition available. + Details
Name: | cvi_ConcentrationRiskNumberOfCustomers
Namespace Prefix: | cvi_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | cvi_ConsolidationAbstract
Namespace Prefix: | cvi_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Represents the minimum percentage of voting by the holders of outstanding common units required for removal of the general partner. + References No definition available. + Details
Name: | cvi_MinimumPercentageOfVotingRequiredForRemovalOfGeneralPartner
Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition Threshold percentage which the entity uses for disclosure. + References No definition available. + Details
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Namespace Prefix: | cvi_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

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- Details
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- Details
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