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Debt and Lines of Credit - Long-term Debt (Details) - Unsecured Term Loan - 2.150% Senior Unsecured Notes Due December 2030 - Acuity Brands Lighting, Inc. - USD ($)
$ in Millions
 12 Months Ended
Nov. 10, 2020
Aug. 31, 2023
Debt Instrument [Line Items]    
Scheduled future principal payment   $ 500.0
Debt instrument, face amount $ 500.0  
Interest rate (percent) 2.15%  
Debt instrument issuance price percent of total 99.737%  
Debt issuance costs, gross $ 4.8  
Term of facility 10 years