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Income Taxes - Narrative (Details)	3 Months Ended					9 Months Ended
Income Taxes - Narrative (Details)	Sep. 30, 2026 USD ($)	Mar. 31, 2026 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2025 USD ($)	Mar. 31, 2025 USD ($)	Sep. 30, 2026 USD ($)	Sep. 30, 2025 USD ($)	Jun. 30, 2026 USD ($)	Dec. 31, 2025 USD ($)
Income Tax Contingency [Line Items]
Payments of tax made on behalf of non-controlling members	$ 1,000,000		$ 1,000,000			$ 4,000,000	$ 4,000,000
Establishment of deferred tax assets related to increases in tax basis in Carvana Group		$ 2,000,000		$ 64,000,000	$ 3,000,000
Uncertain tax positions	0					0			$ 0
Related reserves	$ 0					$ 0			0
Effective income tax rate (benefit) expense	12.50%		(1.50%)			10.90%	(0.20%)
Amount of cash savings as a result of tax attributes created from sales/exchanges, percent	0.85					0.85
Remaining tax benefits, percent	0.15					0.15
Tax receivable agreement, liability	$ 2,230,000,000					$ 2,230,000,000		$ 2,229,000,000	2,265,000,000
Tax receivable agreement liability, current	100,000,000					100,000,000			37,000,000
Tax receivable agreement payments	0					37,000,000	$ 17,000,000
Related Party
Income Tax Contingency [Line Items]
Payments of tax made on behalf of non-controlling members	1,000,000		$ 1,000,000			3,000,000	3,000,000
Tax receivable agreement, liability	1,700,000,000					1,700,000,000			$ 1,700,000,000
Tax receivable agreement payments						29,000,000	13,000,000
Additional Paid-in Capital
Income Tax Contingency [Line Items]
Establishment of deferred tax assets related to increases in tax basis in Carvana Group		$ 2,000,000		$ 64,000,000	$ 3,000,000
Carvana Group
Income Tax Contingency [Line Items]
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			209,000,000
Carvana Group \| Additional Paid-in Capital
Income Tax Contingency [Line Items]
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			209,000,000
LLC Unit Exchanges \| Carvana Group \| Additional Paid-in Capital
Income Tax Contingency [Line Items]
Establishment of deferred tax assets related to increases in tax basis in Carvana Group	$ 0		208,000,000			$ 2,000,000	275,000,000
At The Market Offering "ATM Offering" \| Carvana Group \| Additional Paid-in Capital
Income Tax Contingency [Line Items]
Establishment of deferred tax assets related to increases in tax basis in Carvana Group			$ 1,000,000				$ 1,000,000