Condensed Consolidated Statements of Stockholders' Equity - USD ($) $ in Millions	Total	Equity Offering	Carvana Group	Common Stock Class A Common Stock	Common Stock Class A Common Stock Restricted Stock Units	Common Stock Class B Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Equity Offering	Additional Paid-in Capital Carvana Group	Accumulated Deficit	Non-controlling Interests	Non-controlling Interests Equity Offering
Stockholders' Equity, beginning of the period (in shares) at Dec. 31, 2019				50,507,000		101,219,000
Stockholders' Equity, beginning of the period at Dec. 31, 2019	$ 192			$ 0		$ 0	$ 281			$ (183)	$ 94
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(184)									(60)	(124)
Exchanges of LLC Units (in shares)				116,000		19,000
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			$ 2						$ 2
Establishment of valuation allowance related to deferred tax assets associated with increases in tax basis in Carvana Group			(2)						(2)
Issuance of Class A common stock (in shares)					38,000
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes (in shares)				(8,000)
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes	(2)						(2)
Options exercised (in shares)				7,000
Equity-based compensation	7						7
Stockholders' Equity, end of the period (in shares) at Mar. 31, 2020				50,660,000		101,200,000
Stockholders' Equity, end of the period at Mar. 31, 2020	13			$ 0		$ 0	286			(243)	(30)
Stockholders' Equity, beginning of the period (in shares) at Dec. 31, 2019				50,507,000		101,219,000
Stockholders' Equity, beginning of the period at Dec. 31, 2019	192			$ 0		$ 0	281			(183)	94
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(308)
Exchanges of LLC Units							6				(6)
Stockholders' Equity, end of the period (in shares) at Sep. 30, 2020				70,538,000		101,200,000
Stockholders' Equity, end of the period at Sep. 30, 2020	961			$ 0		$ 0	721			(291)	531
Stockholders' Equity, beginning of the period (in shares) at Mar. 31, 2020				50,660,000		101,200,000
Stockholders' Equity, beginning of the period at Mar. 31, 2020	13			$ 0		$ 0	286			(243)	(30)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(106)									(41)	(65)
Exchanges of LLC Units (in shares)				285,000
Exchanges of LLC Units	0	$ 0					1	$ (643)			(1)	$ 643
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			21						21
Establishment of valuation allowance related to deferred tax assets associated with increases in tax basis in Carvana Group			(21)						(21)
Issuance of Class A common stock (in shares)				18,333,000	61,000
Issuances of Class A common stock, net of underwriters' discounts and commissions and offering expenses	1,059						1,059
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes (in shares)				(26,000)
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes	(4)						(4)
Options exercised (in shares)				101,000
Options exercised	3						3
Equity-based compensation	8						8
Stockholders' Equity, end of the period (in shares) at Jun. 30, 2020				69,414,000		101,200,000
Stockholders' Equity, end of the period at Jun. 30, 2020	973			$ 0		$ 0	710			(284)	547
Stockholders' Equity, beginning of the period (in shares) at Mar. 31, 2020				50,660,000		101,200,000
Stockholders' Equity, beginning of the period at Mar. 31, 2020	13			$ 0		$ 0	286			(243)	(30)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Issuances of Class A common stock, net of underwriters' discounts and commissions and offering expenses		$ 1,100
Stockholders' Equity, end of the period (in shares) at Sep. 30, 2021				85,569,000		87,200,000
Stockholders' Equity, end of the period at Sep. 30, 2021	708			$ 0		$ 0	785			(400)	323
Stockholders' Equity, beginning of the period (in shares) at Jun. 30, 2020				69,414,000		101,200,000
Stockholders' Equity, beginning of the period at Jun. 30, 2020	973			$ 0		$ 0	710			(284)	547
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(18)									(7)	(11)
Exchanges of LLC Units (in shares)				1,039,000
Exchanges of LLC Units	0						5				(5)
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			47						47
Establishment of valuation allowance related to deferred tax assets associated with increases in tax basis in Carvana Group			(47)						(47)
Issuance of Class A common stock (in shares)					30,000
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes (in shares)				(2,000)
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes	(3)						(3)
Options exercised (in shares)				57,000
Options exercised	2						2
Equity-based compensation	7						7
Stockholders' Equity, end of the period (in shares) at Sep. 30, 2020				70,538,000		101,200,000
Stockholders' Equity, end of the period at Sep. 30, 2020	961			$ 0		$ 0	721			(291)	531
Stockholders' Equity, beginning of the period (in shares) at Dec. 31, 2020				76,512,000		95,592,000
Stockholders' Equity, beginning of the period at Dec. 31, 2020	802			$ 0		$ 0	742			(354)	414
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(82)									(36)	(46)
Exchanges of LLC Units (in shares)				3,247,000		3,073,000
Exchanges of LLC Units	0						12				(12)
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			225						225
Establishment of valuation allowance related to deferred tax assets associated with increases in tax basis in Carvana Group			(225)						(225)
Issuance of Class A common stock (in shares)					62,000
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes (in shares)				(2,000)
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes	(9)						(9)
Options exercised (in shares)				15,000
Equity-based compensation	10						10
Stockholders' Equity, end of the period (in shares) at Mar. 31, 2021				79,834,000		92,519,000
Stockholders' Equity, end of the period at Mar. 31, 2021	721			$ 0		$ 0	755			(390)	356
Stockholders' Equity, beginning of the period (in shares) at Dec. 31, 2020				76,512,000		95,592,000
Stockholders' Equity, beginning of the period at Dec. 31, 2020	802			$ 0		$ 0	742			(354)	414
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(105)
Exchanges of LLC Units							32				(32)
Stockholders' Equity, end of the period (in shares) at Sep. 30, 2021				85,569,000		87,200,000
Stockholders' Equity, end of the period at Sep. 30, 2021	708			$ 0		$ 0	785			(400)	323
Stockholders' Equity, beginning of the period (in shares) at Mar. 31, 2021				79,834,000		92,519,000
Stockholders' Equity, beginning of the period at Mar. 31, 2021	721			$ 0		$ 0	755			(390)	356
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	45									22	23
Exchanges of LLC Units (in shares)				3,189,000		3,118,000
Exchanges of LLC Units	0						12				(12)
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			217						217
Establishment of valuation allowance related to deferred tax assets associated with increases in tax basis in Carvana Group			(217)						(217)
Issuance of Class A common stock (in shares)					59,000
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes (in shares)				(2,000)
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes	(8)						(8)
Options exercised (in shares)				26,000
Options exercised	1						1
Equity-based compensation	11						11
Stockholders' Equity, end of the period (in shares) at Jun. 30, 2021				83,106,000		89,401,000
Stockholders' Equity, end of the period at Jun. 30, 2021	770			$ 0		$ 0	771			(368)	367
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(68)									(32)	(36)
Exchanges of LLC Units (in shares)				2,400,000		2,201,000
Exchanges of LLC Units	0						8				(8)
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			199						199
Establishment of valuation allowance related to deferred tax assets associated with increases in tax basis in Carvana Group			$ (199)						$ (199)
Issuance of Class A common stock (in shares)					42,000
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes (in shares)				(1,000)
Forfeitures of restricted stock and restricted stock surrendered in lieu of withholding taxes	(8)						(8)
Options exercised (in shares)				22,000
Equity-based compensation	14						14
Stockholders' Equity, end of the period (in shares) at Sep. 30, 2021				85,569,000		87,200,000
Stockholders' Equity, end of the period at Sep. 30, 2021	$ 708			$ 0		$ 0	$ 785			$ (400)	$ 323