v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 06, 2026
Entity Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date Mar. 31, 2026  
Document Transition Report false  
Entity File Number 001-39668  
Entity Registrant Name Archer Aviation Inc.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 85-2730902  
Entity Address, Address Line One 190 West Tasman Drive  
Entity Address, City or Town San Jose  
Entity Address, State or Province CA  
Entity Address, Postal Zip Code 95134  
City Area Code 650  
Local Phone Number 272-3233  
Entity Current Reporting Status Yes  
Entity Interactive Data Current Yes  
Entity Filer Category Large Accelerated Filer  
Entity Small Business false  
Entity Emerging Growth Company false  
Entity Shell Company false  
Entity Common Stock, Shares Outstanding   759,598,009
Entity Central Index Key 0001824502  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Class A    
Entity Information [Line Items]    
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Trading Symbol ACHR  
Security Exchange Name NYSE  
Warrants    
Entity Information [Line Items]    
Title of 12(b) Security Warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50 per share  
Trading Symbol ACHR WS  
Security Exchange Name NYSE