Annual report pursuant to Section 13 and 15(d)

Cover

v3.22.0.1
Cover - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Mar. 04, 2022
Jun. 30, 2021
Document Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2021    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-40149    
Entity Registrant Name ALTIMAR ACQUISITION CORP. III    
Entity Incorporation, State or Country Code E9    
Entity Tax Identification Number 98-1576586    
Entity Address, Address Line One 40 West 57th Street    
Entity Address, Address Line Two 33rd Floor    
Entity Address, City or Town New York    
Entity Address, State or Province NY    
Entity Address, Postal Zip Code 10019    
City Area Code 212    
Local Phone Number 287-6767    
Entity Well-known Seasoned Issuer No    
Entity Voluntary Filers No    
Entity Current Reporting Status Yes    
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    
ICFR Auditor Attestation Flag false    
Entity Shell Company true    
Entity Public Float     $ 151.0
Entity Central Index Key 0001841004    
Document Fiscal Year Focus 2021    
Document Fiscal Period Focus FY    
Amendment Flag false    
Units Each Consisting Of One Share Of Class Common Stock And One Third Of One Redeemable Warrant      
Document Information [Line Items]      
Title of 12(b) Security Units, each consisting of one Class A ordinary share, $0.0001 par value, and one-fourth of one redeemable warrant    
Trading Symbol ATAQ.U    
Security Exchange Name NYSE    
Class A ordinary share      
Document Information [Line Items]      
Title of 12(b) Security Class A ordinary shares, $0.0001 par value    
Trading Symbol ATAQ    
Security Exchange Name NYSE    
Entity Common Stock, Shares Outstanding   15,525,000  
Redeemable warrants, each whole warrant exercisable      
Document Information [Line Items]      
Title of 12(b) Security Warrants, each whole warrant exercisable for one Class A ordinary share, each at an exercise price of $11.50 per share    
Trading Symbol ATAQ WS    
Security Exchange Name NYSE    
Class B common stock      
Document Information [Line Items]      
Entity Common Stock, Shares Outstanding   3,881,250