Description of Business and Basis of Presentation	3 Months Ended
Description of Business and Basis of Presentation	Nov. 30, 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 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. These unaudited interim consolidated financial statements reflect all normal and recurring adjustments that are, in the opinion of management, necessary to present fairly our consolidated financial position as of November 30, 2019, our consolidated comprehensive income for the three months ended November 30, 2019 and 2018, and our consolidated cash flows for the three months ended November 30, 2019 and 2018. Certain information and footnote disclosures normally included in our annual financial statements prepared in accordance with U.S. GAAP have been condensed or omitted. However, we believe that the disclosures included herein are adequate to make the information presented not misleading. These financial statements should be read in conjunction with the audited consolidated financial statements as of and for the three years ended August 31, 2019 and notes thereto included in our Annual Report on Form 10-K filed with the Securities and Exchange Commission (the “SEC”) on October 29, 2019 (File No. 001-16583) (“Form 10-K”). The results of operations for the three months ended November 30, 2019 and 2018 are not necessarily indicative of the results to be expected for the full fiscal year due primarily to seasonality, which results in our net sales and net income generally being higher in the second half of our fiscal year, the impact of any acquisitions, and, among other reasons, the continued uncertainty of general economic conditions that may impact our key end markets for the remainder of fiscal 2020.