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Significant Accounting Policies (Policies) | 12 Months Ended
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Aug. 31, 2021
Accounting Policies [Abstract] |
Principles of Consolidation | The Consolidated Financial Statements include the accounts of Acuity Brands, Inc. and its wholly-owned subsidiaries after elimination of intercompany transactions and accounts.
Use of Estimates | The preparation of financial statements and related disclosures in conformity with U.S. GAAP requires management to make estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements, and the reported amounts of revenue and expense during the reporting period. Actual results could differ from those estimates.
Revenue Recognition and Shipping and Handling Fees and Costs | Refer to the Revenue Recognition footnote of the Notes to Consolidated Financial Statements for information related to our revenue recognition accounting policies.We include shipping and handling fees billed to customers in Net sales in the Consolidated Statements of Comprehensive Income. Shipping and handling costs associated with inbound freight and freight between manufacturing facilities and distribution centers are generally recorded in Cost of products sold in the Consolidated Statements of Comprehensive Income. Current deferred revenues primarily consist of software licenses as well as professional service and service-type warranty fees collected prior to performing the related service and are included within Other current liabilities on the Consolidated Balance Sheets. These services are expected to be performed within one year. Revenue earned from beginning contract balances during the year ended August 31, 2021 approximated the current deferred revenue balance at August 31, 2020. Non-current deferred revenues primarily consist of long-term service-type warranties, which are typically recognized ratably as revenue between five and ten years from the date of sale, and are included within Other long-term liabilities on the Consolidated Balance Sheets.
Cash and Cash Equivalents | Cash in excess of daily requirements is invested in time deposits and marketable securities and is included in the accompanying balance sheets at fair value. We consider time deposits and marketable securities with an original maturity of three months or less when purchased to be cash equivalents.
Accounts Receivable | We record accounts receivable at net realizable value. This value includes a reserve for doubtful accounts to reflect our estimate of expected credit losses over the contractual term of our receivables. Our estimation of current expected credit losses reflects our considerations of historical write-offs, an analysis of past due accounts based on the contractual terms of the receivables, and the economic status of customers, if known. We additionally consider the impact of general economic conditions, including construction spending, unemployment rates, and macroeconomic growth, on our customers' future ability to meet their obligations. We believe that the allowance is sufficient to cover uncollectible amounts; however, there can be no assurance that unanticipated future business conditions of customers will not have a negative impact on our results of operations.
Concentrations of Credit Risk | Concentrations of credit risk with respect to receivables, which are typically unsecured, are generally limited due to the wide variety of customers and markets using our lighting, lighting controls, building management systems, and location-aware applications as well as their dispersion across many different geographic areas.
Reclassifications | Certain prior-period amounts have been reclassified to conform to the current year presentation. No material reclassifications occurred during the current period.
Inventories | We review inventory quantities on hand and record a provision for excess or obsolete inventory primarily based on estimated future demand and current market conditions. A significant change in customer demand or market conditions could render certain inventory obsolete and could have a material adverse impact on our operating results in the period the change occurs. The following table summarizes the changes in our inventory reserves for the periods presented (in millions):
| Year Ended August 31,
| 2021 |  | 2020 |  | 2019
Beginning balance | $ | 49.3 |  |  | $ | 22.3 |  |  | $ | 36.8 |
Additions to reserve | 21.4 |  |  | 36.3 |  |  | 10.7 |
Disposals of reserved inventory | (32.7) |  |  | (11.1) |  |  | (25.1) |
Foreign currency translation adjustments | — |  |  | 1.8 |  |  | (0.1) |
Ending balance | $ | 38.0 |  |  | $ | 49.3 |  |  | $ | 22.3 |
Assets Held for Sale | We classify assets as held for sale when a plan for disposal is developed and approved, the asset is available for immediate sale, an active program to locate a buyer at a price reasonable in relation to current fair value is initiated, and transfer of the asset is expected to be completed within one year. We cease the depreciation and amortization of the assets when all of these criteria have been met.
Goodwill and Other Intangibles | Significant estimates and assumptions were used to determine the initial fair value of these acquired intangible assets, including estimated future short-term and long-term net sales and profitability, customer attrition rates, royalty rates, and discount rates. Certain of our intangible assets are attributable to foreign operations and are impacted by currency translation due to movements in foreign currency rates year over year.We test goodwill and indefinite-lived intangible assets for impairment on an annual basis or more frequently as facts and circumstances change, as required by Accounting Standards Codification (“ASC”) Topic 350, Intangibles — Goodwill and Other (“ASC 350”). ASC 350 allows for an optional qualitative analysis for goodwill to determine the likelihood of impairment. If the qualitative review results in a more likely than not probability of impairment, a quantitative analysis is required. The qualitative step may be bypassed entirely in favor of a quantitative test. The quantitative analysis identifies impairments by comparing the fair value of a reporting unit with its carrying value, including goodwill. The fair values can be determined based on a combination of valuation techniques including the expected present value of future cash flows, a market multiple approach, and a comparable transaction approach. If the fair value of a reporting unit exceeds its carrying value, goodwill is not considered impaired. Conversely, if the carrying value of a reporting unit exceeds its fair value, an impairment charge for the difference would be recorded. The impairment test for indefinite-lived trade names consists of comparing the fair value of a trade name with its carrying value. If the carrying amount exceeds the estimated fair value, an impairment loss would be recorded in the amount of the excess. We estimate the fair value of indefinite-lived trade names using a fair value model based on discounted future cash flows. Significant assumptions, including estimated future net sales, royalty rates, and discount rates, are used in the determination of estimated fair value for indefinite-lived trade names.
Share-based Payments | We recognize compensation cost relating to share-based payment transactions in the financial statements based on the estimated grant date fair value of the equity instrument issued. We account for stock options, restricted stock, performance stock units, and director stock units representing certain deferrals into the Nonemployee Director Deferred Compensation Plan (the “Director Plan”) or the Supplemental Deferred Savings Plan (“SDSP”) (both of which are discussed further in the Share-based Payments footnote) based on the grant-date fair value estimated under the current provisions of ASC Topic 718, Compensation — Stock Compensation (“ASC 718”).
Property, Plant and Equipment | Property, plant, and equipment is initially recorded at cost and depreciated principally on a straight-line basis using estimated useful lives of plant and equipment (3 to 40 years for buildings and related improvements and 2 to 15 years for machinery and equipment) for financial reporting purposes. Accelerated depreciation methods are used for income tax purposes. Leasehold improvements are amortized over the shorter of the life of the lease or the estimated useful life of the improvement.
Depreciation, Depletion, and Amortization | Property, plant, and equipment is initially recorded at cost and depreciated principally on a straight-line basis using estimated useful lives of plant and equipment (3 to 40 years for buildings and related improvements and 2 to 15 years for machinery and equipment) for financial reporting purposes. Accelerated depreciation methods are used for income tax purposes. Leasehold improvements are amortized over the shorter of the life of the lease or the estimated useful life of the improvement
Research and Development | Research and development (“R&D”) expense, which is expensed as incurred, consists of compensation, payroll taxes, employee benefits, materials, supplies, and other administrative costs. R&D does not include all new product development costs and is included in Selling, distribution, and administrative expenses in our Consolidated Statements of Comprehensive Income.
Advertising | Advertising costs are expensed as incurred and are included within Selling, distribution, and administrative expenses in our Consolidated Statements of Comprehensive Income.
Interest Expense, Net | Interest expense, net, is comprised primarily of interest expense on long-term debt and line of credit borrowings, partially offset by interest income earned on cash and cash equivalents.
Miscellaneous Expense, Net | Miscellaneous expense, net, is comprised primarily of non-service related components of net periodic pension cost, gains and losses associated with foreign currency-related transactions, and non-operating gains and losses.
Income Taxes | We are taxed at statutory corporate rates after adjusting income reported for financial statement purposes for certain items that are treated differently for income tax purposes. Deferred income tax expenses or benefits result from changes during the year in cumulative temporary differences between the tax basis and book basis of assets and liabilities. Refer to the Income Taxes footnote of the Notes to Consolidated Financial Statements for additional information.
Foreign Currency Translation | The functional currency for foreign operations is generally the local currency where the foreign operations are domiciled. The translation of foreign currencies into U.S. dollars is performed for balance sheet accounts using exchange rates in effect at the balance sheet dates and for revenue and expense accounts using a weighted average exchange rate each month during the year. The gains or losses resulting from the balance sheet translation are included in Foreign currency translation adjustments in the Consolidated Statements of Comprehensive Income and are excluded from net income.
Comprehensive Income | Comprehensive income represents a measure of all changes in equity that result from recognized transactions and other economic events other than transactions with owners in their capacity as owners. Other comprehensive income (loss) includes foreign currency translation and pension adjustments.
New Accounting Pronouncements | Accounting Standards Adopted in Fiscal 2021 ASC Topic 326 — Credit Losses (“ASC 326”) In June 2016, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) No. 2016-13, Financial Instruments - Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments (“ASU 2016-13”), which requires an entity to assess impairment of its financial instruments based on the entity's estimate of expected credit losses. Since the issuance of ASU 2016-13, the FASB released several amendments to improve and clarify the implementation guidance. These standards have been collectively codified within ASC 326. The provisions of ASC 326 are effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2019. We adopted the provisions of ASC 326 as of September 1, 2020, the beginning of fiscal 2021, and applied these changes through an immaterial cumulative-effect adjustment of $0.2 million to retained earnings as of the date of adoption. Our estimation of current expected credit losses reflects our considerations of the impact of general economic conditions, including construction spending, unemployment rates, the effects of the COVID-19 pandemic, and macroeconomic growth, on our customers' ability to meet their obligations. ASU 2018-15 — Customer's Accounting for Implementation Costs Incurred in a Cloud Computing Arrangement that is a Service Contract (“ASU 2018-15”) In August 2018, the FASB issued ASU 2018-15, which requires customers to apply internal-use software guidance to determine the implementation costs that are able to be capitalized. Capitalized implementation costs are required to be amortized over the term of the arrangement, beginning when the cloud computing arrangement is ready for its intended use. ASU 2018-15 is effective for fiscal years, and interim reporting periods within those years, beginning after December 15, 2019. We adopted ASU 2018-15 as of September 1, 2020 on a prospective basis. This standard did not have a material effect on our financial condition, results of operations, or cash flows. Accounting Standards Yet to Be Adopted ASU 2019-12, Simplifying the Accounting for Income Taxes (“ASU 2019-12”) In December 2019, the FASB issued ASU 2019-12, which simplifies the accounting for income taxes, eliminates certain exceptions within ASC Topic 740, Income Taxes, and clarifies certain aspects of the current guidance to promote consistency among reporting entities. ASU 2019-12 is effective for fiscal years beginning after December 15, 2020, or our fiscal 2022. Most amendments within the standard are required to be applied on a prospective basis, while certain amendments must be applied on a retrospective or modified retrospective basis. We do not expect the provisions of ASU 2019-12 to have a material impact on our financial condition, results of operations, and cash flows. All other newly issued accounting pronouncements not yet effective have been deemed either immaterial or not applicable.

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