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CONSOLIDATED STATEMENTS OF CHANGES IN EQUITY (Parenthetical) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2014
Initial Public Offering
Issuance of common units, tax impact	$ 148.0cvi_StockIssuedDuringPeriodValueNewIssuesTaxBenefitExpense / us-gaap_TransactionTypeAxis = us-gaap_IPOMember
Underwritten Offering
Issuance of common units, tax impact	96.0cvi_StockIssuedDuringPeriodValueNewIssuesTaxBenefitExpense / us-gaap_TransactionTypeAxis = cvi_UnderwrittenOfferingMember
Private Placement
Issuance of common units, tax impact	15.2cvi_StockIssuedDuringPeriodValueNewIssuesTaxBenefitExpense / us-gaap_TransactionTypeAxis = us-gaap_PrivatePlacementMember
Secondary Offering
Issuance of common units, tax impact	88.5cvi_StockIssuedDuringPeriodValueNewIssuesTaxBenefitExpense / us-gaap_TransactionTypeAxis = cvi_SecondaryOfferingMember
Second Underwritten Offering
Issuance of common units, tax impact		$ 39.4cvi_StockIssuedDuringPeriodValueNewIssuesTaxBenefitExpense / us-gaap_TransactionTypeAxis = cvi_SecondUnderwrittenOfferingMember

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Stock Issued During Period, Value, New Issues, Tax (Benefit) Expense

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