Non-controlling Interests - Narrative (Details) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2021 USD ($)	Mar. 31, 2021 USD ($)	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($)	Jun. 30, 2020 USD ($)
Noncontrolling Interest [Line Items]
Conversion ratio				1.25
Decrease (increase) adjustments related to LLC units	$ 0	$ 0	$ 0
Carvana Group
Noncontrolling Interest [Line Items]
Ownership percentage by Carvana Co.	47.50%			47.50%
Ownership percentage by LLC Unitholders	52.50%			52.50%
Non-controlling Interests
Noncontrolling Interest [Line Items]
Decrease (increase) adjustments related to LLC units	$ 12	12	1	$ 24	$ 1
Non-controlling Interests | Follow-On Public Offering
Noncontrolling Interest [Line Items]
Decrease (increase) adjustments related to LLC units					(643)
Additional Paid-in Capital
Noncontrolling Interest [Line Items]
Decrease (increase) adjustments related to LLC units	$ (12)	$ (12)	$ (1)	$ (24)	(1)
Additional Paid-in Capital | Follow-On Public Offering
Noncontrolling Interest [Line Items]
Decrease (increase) adjustments related to LLC units					$ 643