Class C Redeemable Preferred Units - (Details) - Carvana, LLC - Class C Redeemable Preferred Units - USD ($) $ in Millions							3 Months Ended
	May 03, 2017	Dec. 09, 2016	Jul. 12, 2016	Apr. 27, 2016	Jul. 27, 2015	Jul. 25, 2015	Mar. 31, 2017	Mar. 31, 2016	Dec. 31, 2016
Temporary Equity [Line Items]
Temporary equity, coupon rate						12.50%
Percent threshold of proceeds payable to original issuance price in which return liability is no longer applicable						200.00%
Accrual of return on Class C redeemable preferred units							$ 7.3	$ 2.0
Temporary equity, acumulated accretion of interest							$ 31.4		$ 24.1
GV Auto I, LLC
Temporary Equity [Line Items]
Temporary equity, shares issued during the period (in shares)			1,672,179
Temporary equity, number of shares authorized for issuance (in shares)			1,672,179
Temporary equity, shares issued during the period, value			$ 9.7
Fidel Family Trust
Temporary Equity [Line Items]
Temporary equity, shares issued during the period (in shares)		468,000
Temporary equity, number of shares authorized for issuance (in shares)		468,000
Temporary equity, shares issued during the period, value		$ 2.7
Affiliated Entity | CVAN Holdings, LLC
Temporary Equity [Line Items]
Temporary equity, shares issued during the period (in shares)			8,597,319		14,051,214
Temporary equity, number of shares authorized for issuance (in shares)			8,597,319		14,051,214
Temporary equity, shares issued during the period, value			$ 50.0		$ 65.0
Investor
Temporary Equity [Line Items]
Temporary equity, shares issued during the period (in shares)				18,300,293
Investor | Mr. Garcia
Temporary Equity [Line Items]
Temporary equity, number of shares authorized for issuance (in shares)				18,300,293
Temporary equity, shares issued during the period, value				$ 100.0
IPO
Temporary Equity [Line Items]
Threshold of public offering price to original issuance price in which return liability is no longer applicable						200.00%
Common Class A | IPO
Temporary Equity [Line Items]
Offering price as a percent of initial issuance price threshold, to trigger automatic conversion						150.00%
Temporary equity, conversion ratio if offering price as a percentage of original issuance price threshold exceeded						1
Subsequent Event | Common Class A | IPO
Temporary Equity [Line Items]
Temporary equity, conversion ratio to permanent equity (in shares)	1