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Business Segments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting [Abstract]
Number of reportable segments	2us-gaap_NumberOfReportableSegments
Petroleum
Segment Reporting Information [Line Items]
Intercompany sales	$ 2.1us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	$ 2.3us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Intercompany cost of product sold (exclusive of depreciation and amortization)	6.5cvi_CostOfGoodsSoldToOtherOperatingSegmentsOfSameEntity / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember	5.9cvi_CostOfGoodsSoldToOtherOperatingSegmentsOfSameEntity / us-gaap_StatementBusinessSegmentsAxis = cvi_PetroleumSegmentMember
Nitrogen Fertilizer
Segment Reporting Information [Line Items]
Intercompany sales	6.5us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	5.9us-gaap_Revenues / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember
Intercompany cost of product sold (exclusive of depreciation and amortization)	$ 1.8cvi_CostOfGoodsSoldToOtherOperatingSegmentsOfSameEntity / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember	$ 2.2cvi_CostOfGoodsSoldToOtherOperatingSegmentsOfSameEntity / us-gaap_StatementBusinessSegmentsAxis = cvi_NitrogenFertilizerSegmentMember

X

- Definition

Represents the cost of goods sold to other operating segments of the same entity.

+ References

No definition available.

+ Details

Name:	cvi_CostOfGoodsSoldToOtherOperatingSegmentsOfSameEntity
Namespace Prefix:	cvi_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

+ References

No definition available.

+ Details

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_SegmentReportingInformationLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cvi_NitrogenFertilizerSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	us-gaap_StatementBusinessSegmentsAxis=cvi_PetroleumSegmentMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: