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of Shares [Roll Forward] Entity Address, Postal Zip Code Entity Address, Postal Zip Code Restatement Determination Date Restatement Determination Date Income tax expense Total provision for income taxes Income Tax Expense (Benefit) Applicable margins as determined by leverage ratio Debt Instrument, Basis Spread on Variable Rate Beginning balance Ending balance Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value Preferred stock, shares issued (in shares) Preferred Stock, Shares Issued Pension Adjustments Service Cost Pension Adjustments Service Cost [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] Pensions plans in which benefit obligation exceeds plan assets: Defined Benefit Plan, Underfunded Plan [Member] Total property, plant, and equipment, at cost Property, Plant and Equipment, Gross Property, Plant and Equipment Property, Plant and Equipment [Member] Defined Benefit Plan, Funding Status [Domain] Defined Benefit Plan, Funding Status [Domain] Long-lived intangible assets Finite-Lived Intangible Assets, Fair Value Disclosure KE2 Therm Solutions, Inc. KE2 Therm Solutions, Inc. [Member] KE2 Therm Solutions, Inc. 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[Axis] Minimum Minimum [Member] Adjustments to provisional amounts from acquired businesses Goodwill, Measurement Period Adjustment Company Selected Measure Name Company Selected Measure Name Net income Business Combination, Pro Forma Information, Pro Forma Income (Loss), after Tax Debt and Lines of Credit Debt Disclosure [Text Block] Aggregate Available Trading Arrangement, Securities Aggregate Available Amount Accounts payable Accounts Payable, Current Non-current deferred revenues, recognition period Revenue, Performance Obligation, Recognition Period Revenue, Performance Obligation, Recognition Period Product warranty costs Standard Product Warranty Accrual, Increase for Warranties Issued Cash paid for operating lease liabilities Operating Lease, Payments Stock Appreciation Rights (SARs) Stock Appreciation Rights (SARs) [Member] Intangible asset impairment charge Impairment of Intangible Assets (Excluding Goodwill) Provision for current foreign taxes Current Foreign Tax Expense (Benefit) Goodwill [Roll Forward] Goodwill [Roll Forward] Commitments and Contingencies Commitments and Contingencies Disclosure [Text Block] Anticipated decrease in unrecognized tax benefits within the next twelve months Decrease in Unrecognized Tax Benefits is Reasonably Possible Market Options Share-Based Payment Arrangement, Tranche Two [Member] Other Long-Term Assets [Abstract] Other Assets, Noncurrent [Abstract] Diluted weighted average number of shares outstanding (in shares) Diluted weighted average number of shares outstanding (in shares) Weighted Average Number of Shares Outstanding, Diluted Acuity Brands Lighting Segment and Acuity Intelligent Space Segment Segment Reporting, Policy [Policy Text Block] Non-GAAP Measure Description Non-GAAP Measure Description [Text Block] Amortization of defined benefit pension items- Actuarial losses Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax Acuity Brands Lighting, Inc. Acuity Brands Lighting, Inc. [Member] Acuity Brands Lighting, Inc. 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