v3.25.2
Cover Page - shares
 9 Months Ended
May 31, 2025
Jun. 23, 2025
Cover [Abstract]    
Document Type 10-Q  
Document Quarterly Report true  
Document Period End Date May 31, 2025  
Document Transition Report false  
Entity File Number 001-16583  
Entity Registrant Name ACUITY INC.  
Entity Incorporation, State or Country Code DE  
Entity Tax Identification Number 58-2632672  
Entity Address, Address Line One 1170 Peachtree Street, N.E.  
Entity Address, Address Line Two Suite 1200  
Entity Address, City or Town Atlanta  
Entity Address, State or Province GA  
Entity Address, Postal Zip Code 30309  
City Area Code 404  
Local Phone Number 853-1400  
Entity Information, Former Legal or Registered Name Acuity Brands, Inc.  
Title of 12(b) Security Common stock, $0.01 par value per share  
Trading Symbol AYI  
Security Exchange Name NYSE  
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   30,644,832
Entity Central Index Key 0001144215  
Amendment Flag false  
Document Fiscal Year Focus 2025  
Document Fiscal Period Focus Q3  
Current Fiscal Year End Date --08-31