XML 36 R1.htm IDEA: XBRL DOCUMENT v3.25.0.1
Cover - USD ($)
 12 Months Ended
Dec. 31, 2024
Feb. 25, 2025
Jun. 30, 2024
Entity Information [Line Items]      
Document Type 10-K    
Document Annual Report true    
Document Period End Date Dec. 31, 2024    
Current Fiscal Year End Date --12-31    
Document Transition Report false    
Entity File Number 001-38979    
Entity Registrant Name Acadian Asset Management Inc.    
Entity Incorporation, State or Country Code DE    
Entity Tax Identification Number 47-1121020    
Entity Address, Address Line One 200 State Street, 13th Floor    
Entity Address, City or Town Boston,    
Entity Address, State or Province MA    
Entity Address, Postal Zip Code 02109    
City Area Code 617    
Local Phone Number 369-7300    
Entity Well-known Seasoned Issuer Yes    
Entity Voluntary Filers No    
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    
ICFR Auditor Attestation Flag true    
Document Financial Statement Error Correction false    
Entity Shell Company false    
Entity Public Float     $ 615,923,637
Entity Common Stock, Shares Outstanding   37,491,828  
Documents Incorporated by Reference
Portions of the definitive Proxy Statement to be delivered to stockholders in connection with the Annual Meeting of Stockholders to be held on or about May 13, 2025 are incorporated by reference into Part III.
    
Entity Central Index Key 0001748824    
Document Fiscal Year Focus 2024    
Document Fiscal Period Focus FY    
Amendment Flag false    
Common stock      
Entity Information [Line Items]      
Title of 12(b) Security Common stock, par value $0.001 per share    
Trading Symbol AAMI    
Security Exchange Name NYSE    
4.800% Notes due 2026      
Entity Information [Line Items]      
Title of 12(b) Security 4.800% Notes due 2026    
Trading Symbol AAMI 26    
Security Exchange Name NYSE