Contingencies, Commitments and Other Liabilities	3 Months Ended
Mar. 31, 2024
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 $17 as of both March 31, 2024 and December 31, 2023, and was recorded in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet (of which $7 was classified as a current liability for both periods), 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 $1 and less than $1 in the first quarter of 2024 and 2023, 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 is $18 (€16 million), including interest up through 2017 and penalties. The Company estimates additional interest to be $2 (€2 million). As a result of the adverse decision from the Paris Administrative Court of Appeal, the Company has concluded that it is no longer more likely than not to sustain its position. In 2023, the Company recorded an income tax reserve in Provision for income taxes in the Statement of Consolidated Operations of $21 (€19), which includes 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 to the FTA in December 2023 and is expecting to pay the additional interest assessment in 2024. The Company also paid the estimated tax related to the 2020-2023 tax years during 2023. If an appeal to the French Administrative Supreme Court is successful, any payment would be refunded with interest. The Company will continue to record an income tax reserve related to the current year 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, provides for cross-indemnities between the Company and Alcoa Corporation for claims subject to indemnification. 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, provides for cross-indemnities between the Company and Arconic Corporation for claims subject to indemnification. Among other claims that are covered by these indemnities, Arconic Corporation indemnifies the Company (previously named Arconic Inc. and previously named 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, relating to which there are no updates since the filing of the Form 10-K: United Kingdom Litigation (various claims on behalf of survivors and estates of decedents); Raul v. Albaugh, et al. (derivative related claim), and the regulatory investigations in the U.K. Lehman Brothers International (Europe) Legal Proceeding. On June 26, 2020, Lehman Brothers International (Europe) (“LBIE”) filed proceedings in the High Court of Justice, Business and Property Courts of England and Wales against two subsidiaries of the Company, FR Acquisitions Corporation (Europe) Ltd and JFB Firth Rixson Inc. (collectively, the “Firth Rixson Entities”). The proceedings concerned two interest rate swap transactions that the Firth Rixson Entities entered into with LBIE in 2007 and 2008. On June 15, 2023, the Company, the Firth Rixson Entities, and LBIE reached a full and final settlement of all claims arising out of the LBIE legal proceeding. The settlement provides for a payment of $40 to be paid to LBIE in two installments: $15 paid in July 2023 and $25 payable in July 2024. Lockheed Martin Corp v. Howmet Aerospace Inc. On November 30, 2023, Lockheed Martin Corporation (“Lockheed Martin”) filed a complaint in federal district court in the Northern District of Texas (the “District Court”) against the Company and its subsidiary RTI Advanced Forming, Inc. (“RTI”) as defendants. The complaint alleged that the Company and RTI breached a Master Purchase Order between Lockheed Martin and RTI related to the F-35 Joint Strike Fighter production program between Lockheed Martin and the United States government (the “F-35 Program”) by seeking a fair market price adjustment for the provision of titanium mill products under RTI’s separate agreements with Lockheed Martin’s subcontractors for the F-35 Program. Following various claims and counterclaims and court-ordered mediation, the parties reached a confidential settlement agreement on April 2, 2024, to supply until December 31, 2026 subject to revised terms mutually agreed to by the parties. The settlement had no material impact on the results of operations in the current year. The parties stipulated to the dismissal of all claims and counterclaims with prejudice on April 2, 2024. 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 March 31, 2024, Howmet had outstanding bank guarantees related to tax matters, outstanding debt, workers’ compensation, environmental obligations, and customs duties, among others. The total amount committed under these guarantees, which expire at various dates between 2024 and 2040, was $25 as of March 31, 2024. 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 had a fair value of $6 as of March 31, 2024 and December 31, 2023, and were included in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet. The remaining guarantee, for which the Company and Arconic Corporation are secondarily liable in the event of a payment default by Alcoa Corporation, relates to a long-term energy supply agreement that expires in 2047 at an Alcoa Corporation facility. The Company currently views the risk of an Alcoa Corporation payment default on its obligations under the contract to be remote. The Company and Arconic Corporation are required to provide a guarantee up to an estimated present value amount of approximately $1,131 as of both March 31, 2024 and December 31, 2023 in the event of an Alcoa Corporation default. In December 2023, 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, and insurance obligations, among others. The total amount committed under these letters of credit, which automatically renew or expire at various dates, primarily in 2024 and 2025, was $96 as of March 31, 2024. 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 $52 (which are included in the $96 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 environmental obligations and, as a result, the Company has $17 of outstanding letters of credit relating to such liabilities (which are also included in the $96 in the above paragraph). Surety Bonds The Company has outstanding surety bonds primarily related to tax matters, contract performance, workers’ compensation, environmental-related matters, energy contracts, and customs duties. The total amount committed under these annual surety bonds, which automatically renew or expire at various dates, primarily in 2024 and 2025, was $43 as of March 31, 2024. 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 $21 (which are included in the $43 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. On January 1, 2023, the Company adopted the changes issued by the FASB related to disclosure requirements of supplier finance program obligations. 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 120 days of the invoice date. As of March 31, 2024 and December 31, 2023, supplier invoices that are subject to future payment under these programs were $269 and $258, respectively, and are included in Accounts payable, trade in the Consolidated Balance Sheet.

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 $17 as of both March 31, 2024 and December 31, 2023, and was recorded in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet (of which $7 was classified as a current liability for both periods), 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 $1 and less than $1 in the first quarter of 2024 and 2023, 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 is $18 (€16 million), including interest up through 2017 and penalties. The Company estimates additional interest to be $2 (€2 million).

As a result of the adverse decision from the Paris Administrative Court of Appeal, the Company has concluded that it is no longer more likely than not to sustain its position. In 2023, the Company recorded an income tax reserve in Provision for income taxes in the Statement of Consolidated Operations of $21 (€19), which includes 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 to the FTA in December 2023 and is expecting to pay the additional interest assessment in 2024. The Company also paid the estimated tax related to the 2020-2023 tax years during 2023. If an appeal to the French Administrative Supreme Court is successful, any payment would be refunded with interest. The Company will continue to record an income tax reserve related to the current year 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, provides for cross-indemnities between the Company and Alcoa Corporation for claims subject to indemnification. 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, provides for cross-indemnities between the Company and Arconic Corporation for claims subject to indemnification. Among other claims that are covered by these indemnities, Arconic Corporation indemnifies the Company (previously named Arconic Inc. and previously named 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, relating to which there are no updates since the filing of the Form 10-K: United Kingdom Litigation (various claims on behalf of survivors and estates of decedents); Raul v. Albaugh, et al. (derivative related claim), and the regulatory investigations in the U.K.

Lehman Brothers International (Europe) Legal Proceeding. On June 26, 2020, Lehman Brothers International (Europe) (“LBIE”) filed proceedings in the High Court of Justice, Business and Property Courts of England and Wales against two subsidiaries of the Company, FR Acquisitions Corporation (Europe) Ltd and JFB Firth Rixson Inc. (collectively, the “Firth Rixson Entities”). The proceedings concerned two interest rate swap transactions that the Firth Rixson Entities entered into with LBIE in 2007 and 2008. On June 15, 2023, the Company, the Firth Rixson Entities, and LBIE reached a full and final settlement of all claims arising out of the LBIE legal proceeding. The settlement provides for a payment of $40 to be paid to LBIE in two installments: $15 paid in July 2023 and $25 payable in July 2024.

Lockheed Martin Corp v. Howmet Aerospace Inc. On November 30, 2023, Lockheed Martin Corporation (“Lockheed Martin”) filed a complaint in federal district court in the Northern District of Texas (the “District Court”) against the Company and its subsidiary RTI Advanced Forming, Inc. (“RTI”) as defendants. The complaint alleged that the Company and RTI breached a Master Purchase Order between Lockheed Martin and RTI related to the F-35 Joint Strike Fighter production program between Lockheed Martin and the United States government (the “F-35 Program”) by seeking a fair market price adjustment for the provision of titanium mill products under RTI’s separate agreements with Lockheed Martin’s subcontractors for the F-35 Program.

Following various claims and counterclaims and court-ordered mediation, the parties reached a confidential settlement agreement on April 2, 2024, to supply until December 31, 2026 subject to revised terms mutually agreed to by the parties. The settlement had no material impact on the results of operations in the current year. The parties stipulated to the dismissal of all claims and counterclaims with prejudice on April 2, 2024.

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.

As of March 31, 2024, Howmet had outstanding bank guarantees related to tax matters, outstanding debt, workers’ compensation, environmental obligations, and customs duties, among others. The total amount committed under these guarantees, which expire at various dates between 2024 and 2040, was $25 as of March 31, 2024.

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 had a fair value of $6 as of March 31, 2024 and December 31, 2023, and were included in Other noncurrent liabilities and deferred credits in the Consolidated Balance Sheet. The remaining guarantee, for which the Company and Arconic Corporation are secondarily liable in the event of a payment default by Alcoa Corporation, relates to a long-term energy supply agreement that expires in 2047 at an Alcoa Corporation facility. The Company currently views the risk of an Alcoa Corporation payment default on its obligations under the contract to be remote. The Company and Arconic Corporation are required to provide a guarantee up to an estimated present value amount of approximately $1,131 as of both March 31, 2024 and December 31, 2023 in the event of an Alcoa Corporation default. In December 2023, 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.

The Company has outstanding letters of credit primarily related to workers’ compensation, environmental obligations, and insurance obligations, among others. The total amount committed under these letters of credit, which automatically renew or expire at various dates, primarily in 2024 and 2025, was $96 as of March 31, 2024.

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 $52 (which are included in the $96 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 environmental obligations and, as a result, the Company has $17 of outstanding letters of credit relating to such liabilities (which are also included in the $96 in the above paragraph).

The Company has outstanding surety bonds primarily related to tax matters, contract performance, workers’ compensation, environmental-related matters, energy contracts, and customs duties. The total amount committed under these annual surety bonds, which automatically renew or expire at various dates, primarily in 2024 and 2025, was $43 as of March 31, 2024.

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 $21 (which are included in the $43 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.

On January 1, 2023, the Company adopted the changes issued by the FASB related to disclosure requirements of supplier finance program obligations. 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 120 days of the invoice date. As of March 31, 2024 and December 31, 2023, supplier invoices that are subject to future payment under these programs were $269 and $258, respectively, and are included in Accounts payable, trade in the Consolidated Balance Sheet.