Nature of Business and Summary of Significant Accounting Policies - Schedule of Estimated Useful Lives of Property and Equipment (Details)	Dec. 31, 2025
Vehicles
Property Plant And Equipment [Line Items]
Estimate useful life of property and equipment	5 years
Minimum \| Computer equipment
Property Plant And Equipment [Line Items]
Estimate useful life of property and equipment	2 years
Minimum \| Auction and inspection equipment
Property Plant And Equipment [Line Items]
Estimate useful life of property and equipment	2 years
Minimum \| Furniture and fixtures
Property Plant And Equipment [Line Items]
Estimate useful life of property and equipment	5 years
Maximum \| Computer equipment
Property Plant And Equipment [Line Items]
Estimate useful life of property and equipment	3 years
Maximum \| Auction and inspection equipment
Property Plant And Equipment [Line Items]
Estimate useful life of property and equipment	5 years
Maximum \| Furniture and fixtures
Property Plant And Equipment [Line Items]
Estimate useful life of property and equipment	7 years

ACV Auctions Inc. 10-K