Stockholders' Equity - Organizational Transactions (Details)			1 Months Ended	6 Months Ended	9 Months Ended
	May 03, 2017 vote $ / shares shares	May 02, 2017	Mar. 31, 2015	Jun. 30, 2019	Sep. 30, 2021 class $ / shares shares	Dec. 31, 2020 $ / shares shares
Limited Partners' Capital Account [Line Items]
Preferred stock, shares authorized (in shares)	50,000,000				50,000,000	50,000,000
Preferred stock, par value (in dollars per share) | $ / shares	$ 0.01				$ 0.01	$ 0.01
Number of classes of common ownership interests | class					2
Conversion ratio					1.25
Common unit, multiplier used for conversion ratio					1.25
Class A Units
Limited Partners' Capital Account [Line Items]
Conversion ratio				0.8
Class B Units
Limited Partners' Capital Account [Line Items]
Conversion ratio			0.8
Carvana Group
Limited Partners' Capital Account [Line Items]
Number of classes of common ownership interests | class					2
Carvana Group | Class A Units
Limited Partners' Capital Account [Line Items]
Common units, issued (in shares)					216,000,000	215,000,000
Common units, outstanding (in shares)					216,000,000	215,000,000
Carvana Group | Class B Units
Limited Partners' Capital Account [Line Items]
Common units, issued (in shares)					3,000,000	3,000,000
Common units, outstanding (in shares)					3,000,000	3,000,000
Garcia Parties
Limited Partners' Capital Account [Line Items]
Ownership percentage of outstanding shares, minimum requirement		25.00%
Carvana Sub
Limited Partners' Capital Account [Line Items]
Percentage of voting power		0.10%
Class A Common Stock
Limited Partners' Capital Account [Line Items]
Common stock, shares authorized (in shares)	500,000,000				500,000,000	500,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001				$ 0.001	$ 0.001
Number of votes | vote	1
Required ratio between shares issued and shares owned of subsidiary	0.8
Required ratio between shares outstanding and shares owned of subsidiary	0.8
Class B Common Stock
Limited Partners' Capital Account [Line Items]
Common stock, shares authorized (in shares)	125,000,000				125,000,000	125,000,000
Common stock, par value (in dollars per share) | $ / shares	$ 0.001				$ 0.001	$ 0.001
Number of votes | vote	1
Conversion ratio	0.8
Class B Common Stock | Garcia Parties
Limited Partners' Capital Account [Line Items]
Number of votes | vote	10