Contingencies, Commitments and Other Liabilities	6 Months Ended
Jun. 30, 2025
Commitments and Contingencies Disclosure [Abstract]
Contingencies, Commitments and Other Liabilities	Contingencies, Commitments and Other Liabilities Contingencies The following information supplements and, as applicable, updates the discussion of the contingencies and commitments in Note U to the Consolidated Financial Statements in our Form 10-K, and should be read in conjunction with the complete descriptions provided in the Form 10-K. Environmental Matters. Howmet participates in environmental assessments and/or cleanups at more than 30 locations. These include owned or operating facilities and adjoining properties, previously owned or operated facilities and adjoining properties, and waste sites, including Superfund (Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”)) sites. A liability is recorded for environmental remediation when a cleanup program becomes probable and the costs can be reasonably estimated. As assessments and cleanups proceed, the liability is adjusted based on progress made in determining the extent of remedial actions and related costs. The liability can change substantially due to factors such as the nature and extent of contamination, changes in remedial requirements, and technological changes, among others. The Company’s remediation reserve balance was $16 and $19 as of June 30, 2025 and December 31, 2024, respectively, and was recorded in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet (of which $7 and $10, respectively, was classified as a current liability), and reflects the most probable costs to remediate identified environmental conditions for which costs can be reasonably estimated. Payments related to remediation expenses applied against the reserve were less than $1 and $3 in the second quarter and six months ended June 30, 2025, respectively, and included expenditures currently mandated, as well as those not required by any regulatory authority or third party. Included in annual operating expenses are the recurring costs of managing hazardous substances and environmental programs. These costs are estimated to be less than 1% of Cost of goods sold. Tax. In December 2013 and 2014, the Company received audit assessment notices from the French Tax Authority (“FTA”) for the 2010 through 2012 tax years. In 2016, the Company appealed to the Committee of the Abuse of Tax Law, where it received a favorable nonbinding decision. The FTA disagreed with the Committee of the Abuse of Tax Law’s opinion, and the Company appealed to the Montreuil Administrative Court, where in 2020 the Company prevailed on the merits. The FTA appealed this decision to the Paris Administrative Court of Appeal in 2021. On March 31, 2023, the Company received an adverse decision from the Paris Administrative Court of Appeal. The Company appealed this decision to the French Administrative Supreme Court. The assessment amount was $17 (€16 million), including $10 (€9 million) of tax and interest up through 2017 and $7 (€7 million) of penalties. The Company estimated additional interest to be $2 (€2 million). On July 23, 2024, the Company received the French Administrative Supreme Court’s decision. That decision upheld the assessment of $10 (€9 million) of tax and interest, while cancelling the penalties of $7 (€7 million) and remanding the penalty assessment issue to the Paris Administrative Court of Appeal for reexamination. As a result, the Company has no further right to appeal the assessment of tax and interest but will continue to protest the penalties. In 2023, the Company recorded an income tax reserve in Provision for income taxes in the Statement of Consolidated Operations of $21 (€19 million), which includes tax, estimated interest and penalties, for the 2010 through 2012 tax years, as well as the remaining tax years open for reassessment (2020-2023). In accordance with FTA dispute resolution practices, the Company paid the assessment amount including tax, interest, and penalties, to the FTA in December 2023. The Company is expecting to pay the additional interest related to the assessment in 2025. The Company also paid the estimated tax related to the 2020-2023 tax years in 2023. As of the third quarter of 2024, the Company no longer recorded an uncertain tax position related to the tax and interest assessed. In October 2024, the Company received a refund of the penalties that were remanded. We will continue to record an income tax reserve for penalties determined more than likely to be upheld, until the uncertain tax position is settled. Indemnified Matters. The Separation and Distribution Agreement, dated October 31, 2016, that the Company entered into with Alcoa Corporation in connection with its separation from Alcoa Corporation, and the Separation and Distribution Agreement, dated March 31, 2020, that the Company entered into with Arconic Corporation in connection with its separation from Arconic Corporation, provide for cross-indemnities for claims subject to indemnification between the Company and Alcoa Corporation and between the Company and Arconic Corporation, respectively. To date, Alcoa Corporation and Arconic Corporation have fulfilled their respective indemnification obligations to the Company, and claims subject to indemnification by Alcoa Corporation or Arconic Corporation have not impacted the Company financially. Among other claims that are covered by these indemnities, Arconic Corporation indemnifies the Company (previously named Arconic Inc. and, prior to that, Alcoa Inc.) for all potential liabilities associated with the fire that occurred at the Grenfell Tower in London, U.K. on June 14, 2017, including the following legal proceedings, as updated from the Form 10-K: United Kingdom Litigation. All personal injury claims on behalf of survivors and estates of decedents have been settled pursuant to terms of confidential settlement agreements and are discontinued and closed. On June 21, 2024, the Company was joined as a party to proceedings initiated by the Royal Borough of Kensington and Chelsea (RBKC) and Chelsea Tenant Management Organisation Ltd. (KCTMO) against Arconic Architectural Products SAS (AAP SAS) and Whirlpool. On February 14, 2025, RBKC and KCTMO served their Particulars of Claim and Schedule of Loss on the defendants. On July 18, 2025, the Company and AAP SAS filed their defense and counterclaim against RBKC and KCTMO, and contribution claims against various co-defendants and other third-parties. A case management conference is scheduled for December 8, 2025. Raul v. Albaugh, et al. (derivative related claim). On October 22, 2024, the parties executed a settlement term sheet that set forth the material terms and conditions associated with the resolution of this derivative action. On October 28, 2024, November 27, 2024, January 27, 2025, March 28, 2025 and May 12, 2025, the parties filed joint status reports regarding this development. On May 23, 2025, the parties executed a Stipulation of Settlement, including all exhibits thereto (the “Stipulation of Settlement”), which is subject to court approval, and notified the court of this development. On May 30, 2025, plaintiff filed an unopposed motion for preliminary approval of the settlement and accompanying papers, which included the Stipulation of Settlement. On June 9, 2025, after continuing their fee negotiations with the assistance of a mediator, the parties mutually accepted the mediator’s proposal for an agreed fee and expense amount for plaintiff’s counsel, which is also subject to court approval. On June 25, 2025, the parties executed and filed with the court an addendum to the Stipulation of Settlement, including amended exhibits to the stipulation, which described these developments. The Stipulation of Settlement remains subject to court approval, and the court has not yet issued a preliminary approval order. The Stipulation of Settlement has no material impact on the Company’s results of operations. With respect to the regulatory investigations in the U.K. described in the Form 10-K, there are no updates. Other. In addition to the matters discussed above, various other lawsuits, claims, and proceedings have been or may be instituted or asserted against the Company, including those pertaining to environmental, product liability, safety and health, employment, tax and antitrust matters. While the amounts claimed in these other matters may be substantial, the ultimate liability cannot currently be determined because of the considerable uncertainties that exist. Therefore, it is possible that the Company’s liquidity or results of operations in a period could be materially affected by one or more of these other matters. However, based on facts currently available, management believes that the disposition of these other matters that are pending or asserted will not have a material adverse effect, individually or in the aggregate, on the results of operations, financial position or cash flows of the Company. Commitments Guarantees. As of June 30, 2025, Howmet had outstanding bank guarantees related to customs duties, plant expansion, rental, and environmental obligations. The total amount committed under these guarantees, which expire at various dates between 2025 and 2027, was $6 as of June 30, 2025. Pursuant to the Separation and Distribution Agreement, dated as of October 31, 2016, between Howmet and Alcoa Corporation, Howmet was required to provide certain guarantees for Alcoa Corporation, which were included in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet. The remaining guarantee which had a fair value of $5 as of June 30, 2025 and $6 as of December 31, 2024, relates to a long-term energy supply agreement that expires in 2047 at an Alcoa Corporation facility, for which the Company is secondarily liable in the event of a payment default by Alcoa Corporation. If the Company incurs any liability under this guarantee, Arconic Corporation is obligated to indemnify the Company for 50% of such liability. The Company currently views the risk of an Alcoa Corporation payment default on its obligations under the contract to be remote. The Company is required to provide a guarantee up to an estimated present value amount of approximately $1,121 as of both June 30, 2025 and December 31, 2024 in the event of an Alcoa Corporation default. In the fourth quarter of 2024, a surety bond with a limit of $80 relating to this guarantee was obtained by Alcoa Corporation to protect Howmet’s obligation. This surety bond will be renewed on an annual basis by Alcoa Corporation. Letters of Credit. The Company has outstanding letters of credit primarily related to workers’ compensation, environmental obligations, tax matters, and insurance obligations. The total amount committed under these letters of credit, which automatically renew or expire at various dates, primarily in 2025 and 2026, was $84 as of June 30, 2025. Pursuant to the Separation and Distribution Agreements between the Company and Arconic Corporation and between the Company and Alcoa Corporation, the Company is required to retain letters of credit of $48, which are included in the $84 in the above paragraph, that had previously been provided related to the Company, Arconic Corporation, and Alcoa Corporation workers’ compensation claims that occurred prior to the respective separation transactions of April 1, 2020 and November 1, 2016. Arconic Corporation and Alcoa Corporation workers’ compensation and letters of credit fees paid by the Company are proportionally billed to, and are reimbursed by, Arconic Corporation and Alcoa Corporation, respectively. Also, the Company was required to provide letters of credit for certain Arconic Corporation and Alcoa Corporation environmental obligations and, as a result, the Company has $9 of outstanding letters of credit relating to such liabilities, which are also included in the $84 in the above paragraph. Surety Bonds. The Company has outstanding surety bonds primarily related to workers’ compensation, customs duties, environmental-related matters, and contract performance. The total amount committed under these annual surety bonds, which automatically renew or expire at various dates, primarily in 2025 and 2026, was $45 as of June 30, 2025. Pursuant to the Separation and Distribution Agreements between the Company and Arconic Corporation and between the Company and Alcoa Corporation, the Company is required to provide surety bonds of $20, which are included in the $45 in the above paragraph, that had previously been provided related to the Company, Arconic Corporation, and Alcoa Corporation workers’ compensation claims that occurred prior to the respective separation transactions of April 1, 2020 and November 1, 2016. Arconic Corporation and Alcoa Corporation workers’ compensation claims and surety bond fees paid by the Company are proportionately billed to, and are reimbursed by, Arconic Corporation and Alcoa Corporation, respectively. Other Liabilities Supplier Financing Arrangements. We offer voluntary supplier finance programs to suppliers who may elect to sell their receivables to third parties at the sole discretion of both the suppliers and the third parties. The program is at no cost to the Company and provides additional liquidity to our suppliers, if they desire, at their cost. Under these programs, the Company pays the third-party bank, rather than the supplier, the stated amount of the confirmed invoices on the original maturity date of the invoices. The Company or the third-party bank may terminate a program upon at least 30 days’ notice. Supplier invoices under the program require payment in full no more than approximately 120 days of the invoice date. As of June 30, 2025 and December 31, 2024, supplier invoices that are subject to future payment under these programs were $295 and $268, respectively, and are included in Accounts payable, trade in the Consolidated Balance Sheet.

Environmental Matters. Howmet participates in environmental assessments and/or cleanups at more than 30 locations. These include owned or operating facilities and adjoining properties, previously owned or operated facilities and adjoining properties, and waste sites, including Superfund (Comprehensive Environmental Response, Compensation and Liability Act (“CERCLA”)) sites.

A liability is recorded for environmental remediation when a cleanup program becomes probable and the costs can be reasonably estimated. As assessments and cleanups proceed, the liability is adjusted based on progress made in determining the extent of remedial actions and related costs. The liability can change substantially due to factors such as the nature and extent of contamination, changes in remedial requirements, and technological changes, among others.

The Company’s remediation reserve balance was $16 and $19 as of June 30, 2025 and December 31, 2024, respectively, and was recorded in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet (of which $7 and $10, respectively, was classified as a current liability), and reflects the most probable costs to remediate identified environmental conditions for which costs can be reasonably estimated. Payments related to remediation expenses applied against the reserve were less than $1 and $3 in the second quarter and six months ended June 30, 2025, respectively, and included expenditures currently mandated, as well as those not required by any regulatory authority or third party.

Tax. In December 2013 and 2014, the Company received audit assessment notices from the French Tax Authority (“FTA”) for the 2010 through 2012 tax years. In 2016, the Company appealed to the Committee of the Abuse of Tax Law, where it received a favorable nonbinding decision. The FTA disagreed with the Committee of the Abuse of Tax Law’s opinion, and the Company appealed to the Montreuil Administrative Court, where in 2020 the Company prevailed on the merits. The FTA appealed this decision to the Paris Administrative Court of Appeal in 2021. On March 31, 2023, the Company received an adverse decision from the Paris Administrative Court of Appeal. The Company appealed this decision to the French Administrative Supreme Court. The assessment amount was $17 (€16 million), including $10 (€9 million) of tax and interest up through 2017 and $7 (€7 million) of penalties. The Company estimated additional interest to be $2 (€2 million). On July 23, 2024, the Company received the French Administrative Supreme Court’s decision. That decision upheld the assessment of $10 (€9 million) of tax and interest, while cancelling the penalties of $7 (€7 million) and remanding the penalty assessment issue to the Paris Administrative Court of Appeal for reexamination. As a result, the Company has no further right to appeal the assessment of tax and interest but will continue to protest the penalties.

In 2023, the Company recorded an income tax reserve in Provision for income taxes in the Statement of Consolidated Operations of $21 (€19 million), which includes tax, estimated interest and penalties, for the 2010 through 2012 tax years, as well as the remaining tax years open for reassessment (2020-2023). In accordance with FTA dispute resolution practices, the Company paid the assessment amount including tax, interest, and penalties, to the FTA in December 2023. The Company is expecting to pay the additional interest related to the assessment in 2025. The Company also paid the estimated tax related to the 2020-2023 tax years in 2023. As of the third quarter of 2024, the Company no longer recorded an uncertain tax position related to the tax and interest assessed. In October 2024, the Company received a refund of the penalties that were remanded. We will continue to record an income tax reserve for penalties determined more than likely to be upheld, until the uncertain tax position is settled.

Indemnified Matters. The Separation and Distribution Agreement, dated October 31, 2016, that the Company entered into with Alcoa Corporation in connection with its separation from Alcoa Corporation, and the Separation and Distribution Agreement, dated March 31, 2020, that the Company entered into with Arconic Corporation in connection with its separation from Arconic Corporation, provide for cross-indemnities for claims subject to indemnification between the Company and Alcoa Corporation and between the Company and Arconic Corporation, respectively. To date, Alcoa Corporation and Arconic Corporation have fulfilled their respective indemnification obligations to the Company, and claims subject to indemnification by Alcoa Corporation or Arconic Corporation have not impacted the Company financially. Among other claims that are covered by these indemnities, Arconic Corporation indemnifies the Company (previously named Arconic Inc. and, prior to that, Alcoa Inc.) for all potential liabilities associated with the fire that occurred at the Grenfell Tower in London, U.K. on June 14, 2017, including the following legal proceedings, as updated from the Form 10-K:

United Kingdom Litigation. All personal injury claims on behalf of survivors and estates of decedents have been settled pursuant to terms of confidential settlement agreements and are discontinued and closed. On June 21, 2024, the Company was joined as a party to proceedings initiated by the Royal Borough of Kensington and Chelsea (RBKC) and Chelsea Tenant Management Organisation Ltd. (KCTMO) against Arconic Architectural Products SAS (AAP SAS) and Whirlpool. On February 14, 2025, RBKC and KCTMO served their Particulars of Claim and Schedule of Loss on the defendants. On July 18, 2025, the Company and AAP SAS filed their defense and counterclaim against RBKC and KCTMO, and contribution claims against various co-defendants and other third-parties. A case management conference is scheduled for December 8, 2025.

Raul v. Albaugh, et al. (derivative related claim). On October 22, 2024, the parties executed a settlement term sheet that set forth the material terms and conditions associated with the resolution of this derivative action. On October 28, 2024, November 27, 2024, January 27, 2025, March 28, 2025 and May 12, 2025, the parties filed joint status reports regarding this development. On May 23, 2025, the parties executed a Stipulation of Settlement, including all exhibits thereto (the “Stipulation of Settlement”), which is subject to court approval, and notified the court of this development. On May 30, 2025, plaintiff filed an unopposed motion for preliminary approval of the settlement and accompanying papers, which included the Stipulation of Settlement. On June 9, 2025, after continuing their fee negotiations with the assistance of a mediator, the parties mutually accepted the mediator’s proposal for an agreed fee and expense amount for plaintiff’s counsel, which is also subject to court approval. On June 25, 2025, the parties executed and filed with the court an addendum to the Stipulation of Settlement, including amended exhibits to the stipulation, which described these developments. The Stipulation of Settlement remains subject to court approval, and the court has not yet issued a preliminary approval order. The Stipulation of Settlement has no material impact on the Company’s results of operations.

Other. In addition to the matters discussed above, various other lawsuits, claims, and proceedings have been or may be instituted or asserted against the Company, including those pertaining to environmental, product liability, safety and health, employment, tax and antitrust matters. While the amounts claimed in these other matters may be substantial, the ultimate liability cannot currently be determined because of the considerable uncertainties that exist. Therefore, it is possible that the Company’s liquidity or results of operations in a period could be materially affected by one or more of these other matters. However, based on facts currently available, management believes that the disposition of these other matters that are pending or asserted will not have a material adverse effect, individually or in the aggregate, on the results of operations, financial position or cash flows of the Company.

Pursuant to the Separation and Distribution Agreement, dated as of October 31, 2016, between Howmet and Alcoa Corporation, Howmet was required to provide certain guarantees for Alcoa Corporation, which were included in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet. The remaining guarantee which had a fair value of $5 as of June 30, 2025 and $6 as of December 31, 2024, relates to a long-term energy supply agreement that expires in 2047 at an Alcoa Corporation facility, for which the Company is secondarily liable in the event of a payment default by Alcoa Corporation. If the Company incurs any liability under this guarantee, Arconic Corporation is obligated to indemnify the Company for 50% of such liability. The Company currently views the risk of an Alcoa Corporation payment default on its obligations under the contract to be remote. The Company is required to provide a guarantee up to an estimated present value amount of approximately $1,121 as of both June 30, 2025 and December 31, 2024 in the event of an Alcoa Corporation default. In the fourth quarter of 2024, a surety bond with a limit of $80 relating to this guarantee was obtained by Alcoa Corporation to protect Howmet’s obligation. This surety bond will be renewed on an annual basis by Alcoa Corporation.

Letters of Credit. The Company has outstanding letters of credit primarily related to workers’ compensation, environmental obligations, tax matters, and insurance obligations. The total amount committed under these letters of credit, which automatically renew or expire at various dates, primarily in 2025 and 2026, was $84 as of June 30, 2025.

Pursuant to the Separation and Distribution Agreements between the Company and Arconic Corporation and between the Company and Alcoa Corporation, the Company is required to retain letters of credit of $48, which are included in the $84 in the above paragraph, that had previously been provided related to the Company, Arconic Corporation, and Alcoa Corporation workers’ compensation claims that occurred prior to the respective separation transactions of April 1, 2020 and November 1, 2016. Arconic Corporation and Alcoa Corporation workers’ compensation and letters of credit fees paid by the Company are proportionally billed to, and are reimbursed by, Arconic Corporation and Alcoa Corporation, respectively. Also, the Company was required to provide letters of credit for certain Arconic Corporation and Alcoa Corporation environmental obligations and, as a result, the Company has $9 of outstanding letters of credit relating to such liabilities, which are also included in the $84 in the above paragraph.

Surety Bonds. The Company has outstanding surety bonds primarily related to workers’ compensation, customs duties, environmental-related matters, and contract performance. The total amount committed under these annual surety bonds, which automatically renew or expire at various dates, primarily in 2025 and 2026, was $45 as of June 30, 2025.

Pursuant to the Separation and Distribution Agreements between the Company and Arconic Corporation and between the Company and Alcoa Corporation, the Company is required to provide surety bonds of $20, which are included in the $45 in the above paragraph, that had previously been provided related to the Company, Arconic Corporation, and Alcoa Corporation workers’ compensation claims that occurred prior to the respective separation transactions of April 1, 2020 and November 1, 2016. Arconic Corporation and Alcoa Corporation workers’ compensation claims and surety bond fees paid by the Company are proportionately billed to, and are reimbursed by, Arconic Corporation and Alcoa Corporation, respectively.

Supplier Financing Arrangements. We offer voluntary supplier finance programs to suppliers who may elect to sell their receivables to third parties at the sole discretion of both the suppliers and the third parties. The program is at no cost to the Company and provides additional liquidity to our suppliers, if they desire, at their cost. Under these programs, the Company pays the third-party bank, rather than the supplier, the stated amount of the confirmed invoices on the original maturity date of the invoices. The Company or the third-party bank may terminate a program upon at least 30 days’ notice. Supplier invoices under the program require payment in full no more than approximately 120 days of the invoice date. As of June 30, 2025 and December 31, 2024, supplier invoices that are subject to future payment under these programs were $295 and $268, respectively, and are included in Accounts payable, trade in the Consolidated Balance Sheet.