Stockholders' Equity - Equity Offerings (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions			3 Months Ended
	May 21, 2020	Apr. 01, 2020	Jun. 30, 2020	Sep. 30, 2020
Subsidiary, Sale of Stock [Line Items]
Stock sold during period, net proceeds			$ 1,059
Registered Direct Offering | Carvana Group | Class A Units
Subsidiary, Sale of Stock [Line Items]
LLC units purchased (in shares)		16.7
Public Equity Offering | Carvana Group | Class A Units
Subsidiary, Sale of Stock [Line Items]
LLC units purchased (in shares)	6.3			23.0
Class A Common Stock | Registered Direct Offering
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		13.3
Sale of stock, price per share (in dollars per share)		$ 45
Stock sold during period, net proceeds		$ 600
Class A Common Stock | Registered Direct Offering | Ernest Garcia, II
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		0.6
Stock sold during period, net proceeds		$ 25
Class A Common Stock | Registered Direct Offering | Ernest Garcia III
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)		0.6
Stock sold during period, net proceeds		$ 25
Class A Common Stock | Public Equity Offering
Subsidiary, Sale of Stock [Line Items]
Sale of stock, number of shares issued in transaction (in shares)	5.0
Sale of stock, price per share (in dollars per share)	$ 92
Stock sold during period, net proceeds	$ 459