Related Party Transactions - Lease Assumption from DriveTime (Details) $ in Millions	1 Months Ended	3 Months Ended
Feb. 28, 2019 USD ($) renewal_option	Mar. 31, 2019 renewal_option
Related Party Transaction [Line Items]
Operating lease, number of renewal options		1
DriveTime Automotive Group, Inc. \| Leasehold Improvements and Equipment \| Lease Agreement for Inspection and Reconditioning Center \| Related Party \| Nashville, TN
Related Party Transaction [Line Items]
Agreement to purchase certain leasehold improvements and equipment \| $	$ 2.0
Operating lease term	4 years
Operating lease, number of renewal options	3
Operating leases, renewal term	5 years

Agreement To Acquire Property, Plant, And Equipment

No definition available.

Name:	cvna_AgreementToAcquirePropertyPlantAndEquipment
Namespace Prefix:	cvna_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- References

No definition available.

+ Details

Name:	cvna_LesseeOperatingLeaseNumberOfRenewalOptions
Namespace Prefix:	cvna_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Term of lessee's operating lease renewal, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 50
-Paragraph 3
-Subparagraph (a)(3)
-URI http://asc.fasb.org/extlink&oid=77888426&loc=SL77918673-209980

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Term of lessee's operating lease, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

+ References

+ Details

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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

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Period Type:	duration

- Details

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Namespace Prefix:
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- Details

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Balance Type:
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- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=us-gaap_AffiliatedEntityMember
Namespace Prefix:
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- Details

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