v3.20.4

Leases - Additional Information (Details) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Jul. 31, 2020
Lessee, Lease, Description [Line Items] |  |  |
Short-term lease expense | $ 0.4 | $ 0.4 |
Minimum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Renewal term | 1 year |  |
Financing lease not yet commenced, amount expected to be capitalized at commencement |  |  | $ 20.0
Maximum |  |  |
Lessee, Lease, Description [Line Items] |  |  |
Renewal term | 20 years |  |
Financing lease not yet commenced, amount expected to be capitalized at commencement |  |  | $ 25.0

X
- Definition Lessee, Finance Lease, Lease Not Yet Commenced, Liability + References No definition available. + Details
Name: | cvi_LesseeFinanceLeaseLeaseNotYetCommencedLiability
Namespace Prefix: | cvi_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Lessee, Lease, Renewal Term + References No definition available. + Details
Name: | cvi_LesseeLeaseRenewalTerm
Namespace Prefix: | cvi_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
Name: | us-gaap_LesseeLeaseDescriptionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of short-term lease cost, excluding expense for lease with term of one month or less. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=121609121&loc=SL77918686-209980 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 842 -SubTopic 20 -Section 55 -Paragraph 53 -URI http://asc.fasb.org/extlink&oid=121568110&loc=SL77918982-209971 + Details
Name: | us-gaap_ShortTermLeaseCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |