19. Commitments and Contingencies Pending Litigation - Brazil Tax Assessments In connection with our May 1, 2012 acquisition of the Mead C&amp;OP business, we assumed all of the tax liabilities for the acquired foreign operations including Tilibra Produtos de Papelaria Ltda. ("Tilibra"). For further information, see " Note 12. Income Taxes - Brazil Tax Assessments " for details on tax assessments issued by the FRD against Tilibra challenging the tax deduction of goodwill from Tilibra's taxable income for the years 2007 through 2010. If the FRD's initial position is ultimately sustained, payment of the amount assessed would materially and adversely affect our cash flow in the year of settlement. Brazil Tax Credits In March 2017, the Supreme Court of Brazil ruled against the Brazilian tax authority in a leading case related to the computation of certain indirect taxes. The Supreme Court ruled that the indirect tax base should not include a value-added tax known as "ICMS." The Supreme Court decision, in principle, affects all applicable judicial proceedings in progress, and reduces future indirect taxes on our Brazilian subsidiary, Tilibra. However, the Brazilian tax authority has filed an appeal seeking clarification of certain matters, including the amount by which taxpayers would be entitled to reduce their indirect tax base (i.e. the gross ICMS collected or the net ICMS paid). The appeal also requests a modulation of the decisions effects, which may limit its retrospective impact on taxpayers, including Tilibra. Tilibra has paid and continues to pay these indirect taxes on a tax base which includes the gross ICMS collected. It has also filed legal actions in Brazil to request reimbursement of these excess tax payments by way of future credits ("Tax Credits") and for permission to exclude the gross ICMS collected from the tax base in future periods. Tilibras legal actions cover various time periods and some have been finally decided in a court of law in favor of Tilibra, while others are still pending a final decision. Due to the uncertainties associated with the scope of the application of the Brazilian Supreme Courts ruling, taking into account the Brazilian tax authoritys appeal and request for modulation, the Company has and will recognize income only for the amount of Tax Credits actually monetized, which will occur when Tilibra receives a cash flow benefit from applying the Tax Credits against various taxes payable in Brazil. The benefit of the Tax Credits realized by the Company has and will be recorded in the Consolidated Statements of Income in the line item " Other (income) expense, net ." Tilibra has received final decisions for Tax Credits in the amount of $4.3 million , of which $3.3 million was offset against Brazilian taxes in the fourth quarter of 2019, with the balance expected to be used during the first quarter of 2020. This amount of Tax Credits assumes that only the net amount of ICMS paid can be excluded from the tax base. The total value of these Tax Credits was recorded as a gain in Tilibras local statutory accounts during the third quarter of 2019, resulting in Brazilian federal taxes payable of approximately $1.6 million . Final decisions in the remaining legal actions Tilibra has filed may result in additional Tax Credits that could be monetized in future periods. Further, a favorable decision in the leading case by the Brazilian Supreme Court on the methodology to compute the Tax Credits (i.e. gross ICMS collected) would result in additional Tax Credits being available to Tilibra. The amount of these additional Tax Credits may be material. Foroni, in years prior to acquisition, also filed legal actions in Brazil to recover these excess indirect tax payments; however, all of Foronis claims are still pending a final decision. In the event that any Tax Credits are recovered on behalf of Foroni, in accordance with the quota purchase agreement, we are required to remit such recovery to the former owners of Foroni on a net of income tax paid basis and therefore will not recognize any benefit in the Consolidated Statements of Income . Other Pending Litigation We are party to various lawsuits and regulatory proceedings, primarily related to alleged patent infringement, as well as other claims incidental to our business. In addition, we may be unaware of third-party claims of intellectual property infringement relating to our technology, brands, or products, and we may face other claims related to business operations. Any litigation regarding patents or other intellectual property could be costly and time-consuming and might require us to pay monetary damages or enter into costly license agreements. We also may be subject to injunctions against development and sale of certain of our products. It is the opinion of management that (other than the Brazil Tax Assessments) the ultimate resolution of currently outstanding matters will not have a material adverse effect on our financial condition, results of operations or cash flow. However, there is no assurance that we will ultimately be successful in our defense of any of these matters or that an adverse outcome in any matter will not affect our results of operations, financial condition or cash flow. Further, future claims, lawsuits and legal proceedings could materially and adversely affect our business, reputation, results of operations and financial condition. Unconditional Purchase Commitments Future minimum payments under unconditional purchase commitments, primarily for inventory purchase commitments as of December 31, 2019 were as follows: (in millions) 2020 $ 83.6 2021 1.0 2022 0.3 2023  2024  Thereafter  Total unconditional purchase commitments $ 84.9 Environmental We are subject to national, state, provincial, and/or local environmental laws and regulations concerning the discharge of materials into the environment and the handling, disposal and clean-up of waste materials and other items relating to the protection of the environment. This includes environmental laws and regulations that affect the design and composition of certain of our products. It is not possible to quantify with certainty the potential impact of actions regarding environmental matters, particularly remediation and other compliance efforts that we may undertake in the future. In the opinion of management, compliance with the present environmental protection laws, before taking into account estimated recoveries from third parties, will not have a material adverse effect upon our capital expenditures, financial condition and results of operations, or competitive position.