v3.25.2
Debt and Lines of Credit (Details) - USD ($)
Nov. 25, 2024
Jun. 30, 2022
Nov. 10, 2020
May 31, 2025
Mar. 31, 2025
Aug. 31, 2024
2.150% Senior Unsecured Notes Due December 2030 | Unsecured Debt | Acuity Brands Lighting, Inc.            
Debt Instrument [Line Items]            
Aggregate principal amount     $ 500,000,000.0      
Interest rate (as percent)     2.15%      
Debt issuance price as a percentage of face value (as percent)     99.737%      
Deferred issuance costs     $ 4,800,000      
Term of instrument (in years)     10 years      
Revolving Credit Facility | Line of Credit | Revolving Credit Facility            
Debt Instrument [Line Items]            
Term of instrument (in years)   5 years        
Executed revolving credit facility   $ 600,000,000.0        
Line of credit facility, additional borrowing capacity   $ 400,000,000.0        
Current debt       $ 0   $ 0
Revolving Credit Facility | Letters of Credit | Revolving Credit Facility            
Debt Instrument [Line Items]            
Outstanding letters of credit       4,200,000    
Term Loan Facility | Line of Credit            
Debt Instrument [Line Items]            
Executed revolving credit facility $ 600,000,000.0          
Current debt         $ 100,000,000.0  
Debt, long-term and short-term, combined amount       500,000,000.0    
Term Loan Facility | Line of Credit | Minimum            
Debt Instrument [Line Items]            
Commitment fees rate 0.075%          
Term Loan Facility | Line of Credit | Minimum | Secured Overnight Financing Rate (SOFR)            
Debt Instrument [Line Items]            
Applicable margins as determined by leverage ratio or ratings level 0.875%          
Term Loan Facility | Line of Credit | Minimum | Base Rate            
Debt Instrument [Line Items]            
Applicable margins as determined by leverage ratio or ratings level 0.00%          
Term Loan Facility | Line of Credit | Maximum            
Debt Instrument [Line Items]            
Commitment fees rate 0.175%          
Term Loan Facility | Line of Credit | Maximum | Secured Overnight Financing Rate (SOFR)            
Debt Instrument [Line Items]            
Applicable margins as determined by leverage ratio or ratings level 1.375%          
Term Loan Facility | Line of Credit | Maximum | Base Rate            
Debt Instrument [Line Items]            
Applicable margins as determined by leverage ratio or ratings level 0.375%          
The Credit Agreement | Line of Credit            
Debt Instrument [Line Items]            
Additional borrowing capacity under revolving credit facility       $ 595,800,000