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Description of Business and Basis of Presentation	12 Months Ended
Description of Business and Basis of Presentation	Aug. 31, 2019
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Description of Business and Basis of Presentation	Description of Business and Basis of Presentation Acuity Brands, Inc. (“Acuity Brands”) is the parent company of Acuity Brands Lighting, Inc. (“ABL”) and other wholly-owned subsidiaries (Acuity Brands, ABL, and such other subsidiaries are collectively referred to herein as “we,” “our,” “us,” “the Company,” or similar references) and was incorporated in 2001 under the laws of the State of Delaware. We are one of the world’s leading providers of lighting and building management solutions and services for commercial, institutional, industrial, infrastructure, and residential applications throughout North America and select international markets. Our lighting and building management solutions include devices such as luminaires, lighting controls, controls for various building systems, power supplies, prismatic skylights, and drivers, as well as integrated systems designed to optimize energy efficiency and comfort for various indoor and outdoor applications. Additionally, we continue to expand our solutions portfolio, including software and services, to provide a host of other economic benefits resulting from data analytics that enables the Internet of Things (“IoT”), supports the advancement of smart buildings, smart cities, and the smart grid, and allows businesses to develop custom applications to scale their operations. We have one reportable segment serving the North American lighting market and select international markets. We have prepared the Consolidated Financial Statements in accordance with U.S. generally accepted accounting principles (“U.S. GAAP”) to present the financial position, results of operations, and cash flows of Acuity Brands and its wholly-owned subsidiaries.