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v3.26.1

Debt and Lines of Credit (Details) $ in Millions |  |  |  | 9 Months Ended | 12 Months Ended |
--- | --- | --- | --- | --- | --- | ---
May 08, 2026 USD ($) | Jun. 30, 2022 USD ($) | Nov. 10, 2020 USD ($) | May 31, 2026 USD ($) | May 31, 2025 USD ($) | Aug. 31, 2025 USD ($) | Nov. 25, 2024 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |
Borrowings from term loan |  |  |  | $ 0.0 | $ 600.0 |  |
Letters of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Outstanding letters of credit |  |  |  | 7.2 |  |  |
2.150% Senior Unsecured Notes Due December 2030 | Unsecured Debt | Acuity Brands Lighting, Inc. |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Aggregate principal amount |  |  | $ 500.0 |  |  |  |
Interest rate (as percent) |  |  | 2.15% |  |  |  |
Debt issuance price as a percentage of face value (as percent) |  |  | 99.737% |  |  |  |
Deferred issuance costs |  |  | $ 4.8 |  |  |  |
Term of instrument (in years) |  |  | 10 years |  |  |  |
Credit Agreement | Line of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Long-term debt |  |  |  | $ 200.0 |  |  |
Debt instrument, covenant, leverage ratio, maximum |  |  |  | 3.75 |  |  |
Debt instrument, covenant, leverage ratio, temporary maximum |  |  |  | 4.25 |  |  |
Additional borrowing capacity under revolving credit facility |  |  |  | $ 592.8 |  |  |
Credit Agreement | Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term of instrument (in years) | 5 years |  |  |  |  |  |
Executed revolving credit facility | $ 800.0 |  |  |  |  |  |
Credit Agreement | Line of Credit | Revolving Credit Facility | Minimum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Applicable margins as determined by leverage ratio or ratings level | 0.75% |  |  |  |  |  |
Credit Agreement | Line of Credit | Revolving Credit Facility | Maximum |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Applicable margins as determined by leverage ratio or ratings level | 1.25% |  |  |  |  |  |
Prior Credit Agreement | Line of Credit | Revolving Credit Facility |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Term of instrument (in years) |  | 5 years |  |  |  |  |
Executed revolving credit facility |  | $ 600.0 |  |  |  |  |
Term Loan Facility | Line of Credit |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Executed revolving credit facility |  |  |  |  |  |  | $ 600.0
Repayments of debt | $ 200.0 |  |  | $ 200.0 |  | $ 200.0 |
Long-term debt |  |  |  |  |  | 400.0 |
Term Loan Facility | Line of Credit | QSC, LLC |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |
Borrowings from term loan |  |  |  |  |  | $ 600.0 |

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