Environmental Matters	6 Months Ended
Environmental Matters	Dec. 31, 2025
Environmental Remediation Obligations [Abstract]
ENVIRONMENTAL MATTERS	ENVIRONMENTAL MATTERS The operation of our business has exposed us to certain liabilities and compliance costs related to environmental matters. We are involved in various environmental cleanup and remediation activities at certain sites associated with our current or former operations. We establish and maintain accruals for estimated liabilities associated with certain environmental matters. At December 31, 2025, the balance of such accruals was $10.8 million, of which $1.3 million was current. At June 30, 2025, the balance was $11.0 million, of which $1.4 million was current. We record a loss contingency when the available information indicates it is probable that we have incurred a liability and the amount of the loss is reasonably estimable. The likelihood of a loss with respect to a particular environmental matter is often difficult to predict, and determining a meaningful estimate of the loss or a range of loss may not be practicable based on information available. When a material loss contingency is probable but a reasonable estimate cannot be made, or when a material loss contingency is at least reasonably possible, disclosure is provided. The accruals we have established for estimated environmental liabilities represent our best current estimate of the probable and reasonably estimable costs of addressing identified environmental situations, based on our review of currently available evidence, and taking into consideration our prior experience in remediation and that of other companies, as well as public information released by the United States Environmental Protection Agency (USEPA), other governmental agencies and by the Potentially Responsible Party (PRP) groups in which we are participating. The accrued liabilities for all environmental concerns could change substantially due to factors such as the nature and extent of contamination, changes in remedial requirements, technological changes, discovery of new information, the financial strength of other PRPs, the identification of new PRPs and the involvement of and direction taken by the government or the courts on these matters. Among other environmental laws, we are subject to the Comprehensive Environmental Response Compensation and Liability Act of 1980 (CERCLA), under which we have been identified by the USEPA or other third party as a PRP with respect to environmental remedial costs at certain Superfund sites. We have evaluated our claims and estimated liability associated with these sites based upon the best information currently available to us. We believe our environmental accruals are adequate to cover our portion of the environmental remedial costs at the sites where we have been designated a PRP, to the extent these expenses are probable and reasonably estimable.

The entire disclosure for environmental loss contingencies, such as presence of hazardous waste, relevant information from reports issued by regulators, and estimated costs to achieve compliance with regulatory requirements. This element may be used for all of an entity's disclosures about environmental loss contingencies.

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KENNAMETAL INC 10-Q