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Summary of Significant Accounting Policies (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2014 customer	Dec. 31, 2013 customer
Basis of Consolidation
Percentage of holders of the outstanding common units required to vote for removal of the general partner	66.67%cvi_MinimumPercentageOfVotingRequiredForRemovalOfGeneralPartner
Cash and Cash Equivalents
Checks issued but not presented to banks	21.5cvi_CashAndCashEquivalentsChecksIssuedButNotPresentedToBanks	13.2cvi_CashAndCashEquivalentsChecksIssuedButNotPresentedToBanks
Accounts receivable | Credit concentration | One customer with largest risk concentration
Accounts Receivable, net
Number of customers	0cvi_ConcentrationRiskNumberOfCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / cvi_ConcentrationRiskByLargestCustomersAxis = cvi_LargestSingleCustomerConcentrationRiskMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember	1cvi_ConcentrationRiskNumberOfCustomers / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / cvi_ConcentrationRiskByLargestCustomersAxis = cvi_LargestSingleCustomerConcentrationRiskMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember
Customers individually representing greater than this percentage for disclosure	8.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / cvi_ConcentrationRiskByLargestCustomersAxis = cvi_LargestSingleCustomerConcentrationRiskMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember	12.00%us-gaap_ConcentrationRiskPercentage1 / us-gaap_ConcentrationRiskByBenchmarkAxis = us-gaap_AccountsReceivableMember / cvi_ConcentrationRiskByLargestCustomersAxis = cvi_LargestSingleCustomerConcentrationRiskMember / us-gaap_ConcentrationRiskByTypeAxis = us-gaap_CreditConcentrationRiskMember

X

- Definition

Represents the amount of checks issued but not presented to banks.

+ References

No definition available.

+ Details

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X

- Definition

Represents the number of customers of the entity with concentration risks that exceed the disclosure threshold.

+ References

No definition available.

+ Details

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- Details

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- 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

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- Definition

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 21

-Subparagraph (a)

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13537-108611



Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=6927468&loc=d3e6404-108592



Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

-Paragraph 20

-URI http://asc.fasb.org/extlink&oid=35750535&loc=d3e13531-108611



Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 275

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-Section 50

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