XML 12 R1.htm IDEA: XBRL DOCUMENT v3.21.2
Document and Entity Information - shares
 7 Months Ended
Sep. 30, 2021
Dec. 16, 2021
Document Information [Line Items]    
Document Type 10-Q  
Document Quarterly Report true  
Document Transition Report false  
Document Period End Date Sep. 30, 2021  
Entity File Number 001-41013  
Entity Registrant Name Concord Acquisition Corp III  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 86-2171699  
Entity Address, Address Line One 477 Madison Avenue  
Entity Address, City or Town New York  
Entity Address State Or Province NY  
Entity Address, Postal Zip Code 10022  
City Area Code 212  
Local Phone Number 883-4330  
Entity Current Reporting Status No  
Entity Interactive Data Current Yes  
Entity Filer Category Non-accelerated Filer  
Entity Small Business true  
Entity Emerging Growth Company true  
Entity Ex Transition Period false  
Entity Shell Company true  
Entity Central Index Key 0001851961  
Current Fiscal Year End Date --12-31  
Document Fiscal Year Focus 2021  
Document Fiscal Period Focus Q3  
Amendment Flag false  
Transition Report false  
Units, each consisting of one share of Class A Common Stock and one-half of one Warrant    
Document Information [Line Items]    
Title of 12(b) Security Units, each consisting of one share of Class A common stock and one-half of one redeemable warrant  
Trading Symbol CNDB.U  
Security Exchange Name NYSE  
Class A Common Stock    
Document Information [Line Items]    
Title of 12(b) Security Class A common stock, par value $0.0001 per share  
Trading Symbol CNDB  
Security Exchange Name NYSE  
Entity Common Stock, Shares Outstanding   34,500,000
Warrants, each whole warrant exercisable for one share of Class A Common Stock at an exercise price of $11.50    
Document Information [Line Items]    
Title of 12(b) Security Redeemable warrants, each whole warrant exercisable for one share of Class A common stock at an exercise price of $11.50  
Trading Symbol CNDB.WS  
Security Exchange Name NYSE  
Class B Common Stock    
Document Information [Line Items]    
Entity Common Stock, Shares Outstanding   8,625,000