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Debt and Lines of Credit (Details) - USD ($)	Jun. 30, 2022	Nov. 10, 2020	May 31, 2024	Aug. 31, 2023
2.150% Senior Unsecured Notes Due December 2030 | Unsecured debt | Acuity Brands Lighting, Inc.
Line of Credit Facility [Abstract]
Aggregate principal amount		$ 500,000,000
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 | Credit facility
Line of Credit Facility [Abstract]
Term of instrument (in years)	5 years
Executed revolving credit facility	$ 600,000,000
Line of credit facility, additional borrowing capacity	$ 400,000,000
Short-term borrowings outstanding			$ 0	$ 0
Additional borrowing capacity under revolving credit facility			596,200,000
Revolving Credit Facility | Letters of Credit | Credit facility
Line of Credit Facility [Abstract]
Outstanding letters of credit			$ 3,800,000

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