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Commitments and Contingencies | 3 Months Ended
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Nov. 30, 2020
Commitments and Contingencies Disclosure [Abstract] |
Commitments and Contingencies | Commitments and ContingenciesIn the normal course of business, we are subject to the effects of certain contractual stipulations, events, transactions, and laws and regulations that may, at times, require the recognition of liabilities, such as those related to self-insurance estimated liabilities and claims, legal and contractual issues, environmental laws and regulations, guarantees, and indemnities. We establish estimated liabilities when the associated costs related to uncertainties or guarantees become probable and can be reasonably estimated. For the period ended November 30, 2020, no material changes have occurred in our estimated liabilities for self-insurance, litigation, environmental matters, guarantees and indemnities, or relevant events and circumstances, from those disclosed in the Commitments and Contingencies footnote of the Notes to Consolidated Financial Statements within our Form 10-K. Product Warranty and Recall Costs Our products generally have a standard warranty term of five years that assure our products comply with agreed upon specifications. We record an accrual for the estimated amount of future warranty costs when the related revenue is recognized. Estimated costs related to product recalls based on a formal campaign soliciting repair or return of that product are accrued when they are deemed to be probable and can be reasonably estimated. Estimated future warranty and recall costs are primarily based on historical experience of identified warranty and recall claims. However, there can be no assurance that future warranty or recall costs will not exceed historical amounts or that new technology products may not generate unexpected costs. If actual future warranty or recall costs exceed historical amounts, additional increases in the accrual may be required, which could have a material adverse impact on our results of operations and cash flows. Estimated liabilities for product warranty and recall costs are included in Other accrued liabilities and Other long-term liabilities on the Consolidated Balance Sheets. The following table summarizes changes in the estimated liabilities for product warranty and recall costs for the periods presented (in millions):
| Three Months Ended
| November 30, 2020 |  | November 30, 2019
Beginning balance | $ | 16.1 |  |  | $ | 11.5 |
Warranty and recall costs | 6.6 |  |  | 7.9 |
Payments and other deductions | (5.9) |  |  | (7.8) |
Acquired warranty and recall liabilities | — |  |  | 0.1 |
Ending balance | $ | 16.8 |  |  | $ | 11.7 |
Lighting Science Group Patent Litigation On April 30, 2019 and May 1, 2019, Lighting Science Group Corp. (“LSG”) filed complaints with the International Trade Commission and United States District Court for the District of Delaware, respectively, alleging infringement of eight patents by the Company and others. On May 17, 2019, LSG amended both of its complaints and dropped its claims regarding one of the patents. On October 9, 2019 and November 6, 2019, LSG dropped from the International Trade Commission action its claims regarding four additional patents. For the remaining three patents, LSG’s infringement allegations relate to certain of our LED luminaires. On April 7, 2020 and October 1, 2020, the International Trade Commission made final determinations that LSG was not entitled to any relief. In the District of Delaware action, LSG separately sought unspecified monetary damages, costs, and attorneys’ fees. During fiscal 2021, LSG and the Company reached an agreement to resolve their patent disputes pending before the International Trade Commission, United States District Court for the District of Delaware, and the Patent Trial and Appeal Board. According to the terms of the settlement, the various pending actions will be dismissed with prejudice, each party will bear its own fees and costs, and the Company will pay no compensation for the rights granted under the settlement agreement. Securities Class Action On January 3, 2018, a shareholder filed a class action complaint in the United States District Court for the District of Delaware against us and certain of our officers on behalf of all persons who purchased or otherwise acquired our stock between June 29, 2016 and April 3, 2017. On February 20, 2018, a different shareholder filed a second class action complaint in the same venue against the same parties on behalf of all persons who purchased or otherwise acquired our stock between October 15, 2015 and April 3, 2017. The cases were transferred on April 30, 2018, to the United States District Court for the Northern District of Georgia and subsequently were consolidated as In re Acuity Brands, Inc. Securities Litigation, Civil Action No. 1:18-cv-02140-MHC (N.D. Ga.). On October 5, 2018, the court-appointed lead plaintiff filed a consolidated amended class action complaint (the “Consolidated Complaint”), which supersedes the initial complaints. The Consolidated Complaint is brought on behalf of all persons who purchased our common stock between October 7, 2015 and April 3, 2017 and alleges that we and certain of our current and former officers/executives violated the federal securities laws by making false or misleading statements and/or omitting to disclose material adverse facts that (i) concealed known trends negatively impacting sales of our products and (ii) overstated our ability to achieve profitable sales growth. The plaintiffs seek unspecified monetary damages, costs, and attorneys’ fees. We dispute the allegations in the complaints and intend to vigorously defend against the claims. We filed a motion to dismiss the Consolidated Complaint. On August 12, 2019, the court entered an order granting our motion to dismiss in part and dismissing all claims based on 42 of the 47 statements challenged in the Consolidated Complaint but also denying the motion in part and allowing claims based on five challenged statements to proceed to discovery. The Eleventh Circuit Court of Appeals has granted the Company permission to file an interlocutory appeal of the District Court’s class certification order. Estimating an amount or range of possible losses resulting from litigation proceedings is inherently difficult, particularly where the matters involve indeterminate claims for monetary damages and are in the stages of the proceedings where key factual and legal issues have not been resolved. For these reasons, we are currently unable to predict the ultimate timing or outcome of or reasonably estimate the possible losses or a range of possible losses resulting from the matters described above. We are insured, in excess of a self-retention, for Directors and Officers liability. Litigation We are subject to various other legal claims arising in the normal course of business, including patent infringement, employment matters, and product liability claims. Based on information currently available, it is the opinion of management that the ultimate resolution of pending and threatened legal proceedings will not have a material adverse effect on our financial condition, results of operations, or cash flows. However, in the event of unexpected future developments, it is possible that the ultimate resolution of any such matters, if unfavorable, could have a material adverse effect on our financial condition, results of operations, or cash flows in future periods. We establish estimated liabilities for legal claims when associated costs become probable and can be reasonably estimated. The actual costs of resolving legal claims may be substantially higher than the amounts accrued for such claims. However, we cannot make a meaningful estimate of actual costs to be incurred that could possibly be higher or lower than the accrued amounts.

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