v3.26.1
Cover - shares
 3 Months Ended
Mar. 31, 2026
May 12, 2026
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes  
Amendment Flag false  
Document Period End Date Mar. 31, 2026  
Document Fiscal Year Focus 2026  
Document Fiscal Period Focus Q1  
Entity Information [Line Items]    
Entity Registrant Name CHENGHE ACQUISITION III CO.  
Entity Central Index Key 0002047177  
Entity File Number 001-42847  
Entity Tax Identification Number 00-0000000  
Entity Incorporation, State or Country Code E9  
Current Fiscal Year End Date --12-31  
Entity Current Reporting Status Yes  
Entity Shell Company true  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Incorporation, Date of Incorporation Jun. 04, 2024  
Entity Contact Personnel [Line Items]    
Entity Address, Address Line One 38 Beach Road #29-11  
Entity Address, Address Line Two South Beach Tower  
Entity Address, City or Town Singapore  
Entity Address, Country SG  
Entity Address, Postal Zip Code 189767  
Entity Phone Fax Numbers [Line Items]    
City Area Code (+65)  
Local Phone Number 9851 8611  
Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant    
Entity Listings [Line Items]    
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-half of one redeemable warrant  
Trading Symbol CHECU  
Security Exchange Name NASDAQ  
Class A ordinary shares, par value $0.0001 par value    
Entity Listings [Line Items]    
Title of 12(b) Security Class A ordinary shares, par value $0.0001 par value  
Trading Symbol CHEC  
Security Exchange Name NASDAQ  
Redeemable warrants, each warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share    
Entity Listings [Line Items]    
Title of 12(b) Security Redeemable warrants, each warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share  
Trading Symbol CHECW  
Security Exchange Name NASDAQ  
Class A Ordinary Shares    
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   13,058,000
Class B Ordinary Shares    
Entity Listings [Line Items]    
Entity Common Stock, Shares Outstanding   4,216,667