3.26.1 html 519 564 1 false 119 0 false 8 false false R1.htm 0000001 - Document - Cover Sheet http://www.kennametal.com/role/Cover Cover Cover 1 false false R2.htm 0000002 - Document - Audit Information Sheet http://www.kennametal.com/role/AuditInformation Audit Information Cover 2 false false R3.htm 9952151 - Statement - CONSOLIDATED STATEMENTS OF INCOME Sheet http://www.kennametal.com/role/CONSOLIDATEDSTATEMENTSOFINCOME CONSOLIDATED STATEMENTS OF INCOME Statements 3 false false R4.htm 9952152 - Statement - CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Sheet http://www.kennametal.com/role/CONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME Statements 4 false false R5.htm 9952153 - Statement - CONSOLIDATED BALANCE SHEETS Sheet http://www.kennametal.com/role/CONSOLIDATEDBALANCESHEETS CONSOLIDATED BALANCE SHEETS Statements 5 false false R6.htm 9952154 - Statement - CONSOLIDATED BALANCE SHEETS (Parenthetical) Sheet http://www.kennametal.com/role/CONSOLIDATEDBALANCESHEETSParenthetical CONSOLIDATED BALANCE SHEETS (Parenthetical) Statements 6 false false R7.htm 9952155 - Statement - CONSOLIDATED STATEMENTS OF CASH FLOW Sheet http://www.kennametal.com/role/CONSOLIDATEDSTATEMENTSOFCASHFLOW CONSOLIDATED STATEMENTS OF CASH FLOW Statements 7 false false R8.htm 9952156 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Sheet http://www.kennametal.com/role/CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYCONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITY CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY Statements 8 false false R9.htm 9952157 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) Sheet http://www.kennametal.com/role/CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYParenthetical CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (Parenthetical) Statements 9 false false R10.htm 9952158 - Disclosure - Nature of operations Sheet http://www.kennametal.com/role/Natureofoperations Nature of operations Notes 10 false false R11.htm 9952159 - Disclosure - Summary of Significant Accounting Policies Sheet http://www.kennametal.com/role/SummaryofSignificantAccountingPolicies Summary of Significant Accounting Policies Notes 11 false false R12.htm 9952160 - Disclosure - Supplemental Cash Flow Information Sheet http://www.kennametal.com/role/SupplementalCashFlowInformation Supplemental Cash Flow Information Notes 12 false false R13.htm 9952161 - Disclosure - Debt Sheet http://www.kennametal.com/role/Debt Debt Notes 13 false false R14.htm 9952162 - Disclosure - Fair Value Measurements Sheet http://www.kennametal.com/role/FairValueMeasurements Fair Value Measurements Notes 14 false false R15.htm 9952163 - Disclosure - Derivative Instruments and Hedging Activities Sheet http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivities Derivative Instruments and Hedging Activities Notes 15 false false R16.htm 9952164 - Disclosure - Inventories Sheet http://www.kennametal.com/role/Inventories Inventories Notes 16 false false R17.htm 9952165 - Disclosure - Goodwill and Other Intangible Assets Sheet http://www.kennametal.com/role/GoodwillandOtherIntangibleAssets Goodwill and Other Intangible Assets Notes 17 false false R18.htm 9952166 - Disclosure - Leases Sheet http://www.kennametal.com/role/Leases Leases Notes 18 false false R19.htm 9952167 - Disclosure - Other Current Assets And Liabilities Sheet http://www.kennametal.com/role/OtherCurrentAssetsAndLiabilities Other Current Assets And Liabilities Notes 19 false false R20.htm 9952168 - Disclosure - Long-Term Debt Sheet http://www.kennametal.com/role/LongTermDebt Long-Term Debt Notes 20 false false R21.htm 9952169 - Disclosure - Revolving and Other Lines of Credit and Notes Payable Notes http://www.kennametal.com/role/RevolvingandOtherLinesofCreditandNotesPayable Revolving and Other Lines of Credit and Notes Payable Notes 21 false false R22.htm 9952170 - Disclosure - Income Taxes Sheet http://www.kennametal.com/role/IncomeTaxes Income Taxes Notes 22 false false R23.htm 9952171 - Disclosure - Pension and Other Postretirement Benefits Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefits Pension and Other Postretirement Benefits Notes 23 false false R24.htm 9952172 - Disclosure - Accumulated Other Comprehensive Loss Sheet http://www.kennametal.com/role/AccumulatedOtherComprehensiveLoss Accumulated Other Comprehensive Loss Notes 24 false false R25.htm 9952173 - Disclosure - Restructuring and Other Charges, Net Sheet http://www.kennametal.com/role/RestructuringandOtherChargesNet Restructuring and Other Charges, Net Notes 25 false false R26.htm 9952174 - Disclosure - Financial Instruments Sheet http://www.kennametal.com/role/FinancialInstruments Financial Instruments Notes 26 false false R27.htm 9952175 - Disclosure - Stock-Based Compensation Sheet http://www.kennametal.com/role/StockBasedCompensation Stock-Based Compensation Notes 27 false false R28.htm 9952176 - Disclosure - Environmental Matters Sheet http://www.kennametal.com/role/EnvironmentalMatters Environmental Matters Notes 28 false false R29.htm 9952177 - Disclosure - Commitments and Contingencies Sheet http://www.kennametal.com/role/CommitmentsandContingencies Commitments and Contingencies Notes 29 false false R30.htm 9952178 - Disclosure - Segment Data Sheet http://www.kennametal.com/role/SegmentData Segment Data Notes 30 false false R31.htm 9952180 - Disclosure - Divestiture Sheet http://www.kennametal.com/role/Divestiture Divestiture Notes 31 false false R32.htm 9952181 - Disclosure - Schedule II Valuation and Qualifying Accounts and Reserves Sheet http://www.kennametal.com/role/ScheduleIIValuationandQualifyingAccountsandReserves Schedule II Valuation and Qualifying Accounts and Reserves Notes 32 false false R33.htm 995445 - Disclosure - Insider Trading Arrangements Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingArrangements Insider Trading Arrangements Notes 33 false false R34.htm 995447 - Disclosure - Insider Trading Policies and Procedures Sheet http://xbrl.sec.gov/ecd/role/InsiderTradingPoliciesProc Insider Trading Policies and Procedures Notes 34 false false R35.htm 995550 - Disclosure - Cybersecurity Risk Management and Strategy Disclosure Sheet http://xbrl.sec.gov/cyd/role/CybersecurityRiskManagementAndStrategyDisclosure Cybersecurity Risk Management and Strategy Disclosure Notes 35 false false R36.htm 9955511 - Disclosure - Summary of Significant Accounting Policies (Policies) Sheet http://www.kennametal.com/role/SummaryofSignificantAccountingPoliciesPolicies Summary of Significant Accounting Policies (Policies) Policies http://www.kennametal.com/role/SummaryofSignificantAccountingPolicies 36 false false R37.htm 9955512 - Disclosure - Summary Of Significant Accounting Policies Earnings Per Share (Tables) Sheet http://www.kennametal.com/role/SummaryOfSignificantAccountingPoliciesEarningsPerShareTables Summary Of Significant Accounting Policies Earnings Per Share (Tables) Tables 37 false false R38.htm 9955513 - Disclosure - Supplemental Cash Flow Information (Tables) Sheet http://www.kennametal.com/role/SupplementalCashFlowInformationTables Supplemental Cash Flow Information (Tables) Tables http://www.kennametal.com/role/SupplementalCashFlowInformation 38 false false R39.htm 9955514 - Disclosure - Debt (Tables) Sheet http://www.kennametal.com/role/DebtTables Debt (Tables) Tables http://www.kennametal.com/role/Debt 39 false false R40.htm 9955515 - Disclosure - Fair Value Measurements (Tables) Sheet http://www.kennametal.com/role/FairValueMeasurementsTables Fair Value Measurements (Tables) Tables http://www.kennametal.com/role/FairValueMeasurements 40 false false R41.htm 9955516 - Disclosure - Derivative Instruments and Hedging Activities (Tables) Sheet http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivitiesTables Derivative Instruments and Hedging Activities (Tables) Tables http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivities 41 false false R42.htm 9955517 - Disclosure - Inventories (Tables) Sheet http://www.kennametal.com/role/InventoriesTables Inventories (Tables) Tables http://www.kennametal.com/role/Inventories 42 false false R43.htm 9955518 - Disclosure - Goodwill and Other Intangible Assets (Tables) Sheet http://www.kennametal.com/role/GoodwillandOtherIntangibleAssetsTables Goodwill and Other Intangible Assets (Tables) Tables http://www.kennametal.com/role/GoodwillandOtherIntangibleAssets 43 false false R44.htm 9955519 - Disclosure - Leases (Tables) Sheet http://www.kennametal.com/role/LeasesTables Leases (Tables) Tables http://www.kennametal.com/role/Leases 44 false false R45.htm 9955520 - Disclosure - Other Current Assets And Liabilities (Tables) Sheet http://www.kennametal.com/role/OtherCurrentAssetsAndLiabilitiesTables Other Current Assets And Liabilities (Tables) Tables http://www.kennametal.com/role/OtherCurrentAssetsAndLiabilities 45 false false R46.htm 9955521 - Disclosure - Long-Term Debt (Tables) Sheet http://www.kennametal.com/role/LongTermDebtTables Long-Term Debt (Tables) Tables http://www.kennametal.com/role/LongTermDebt 46 false false R47.htm 9955522 - Disclosure - Income Taxes (Tables) Sheet http://www.kennametal.com/role/IncomeTaxesTables Income Taxes (Tables) Tables http://www.kennametal.com/role/IncomeTaxes 47 false false R48.htm 9955523 - Disclosure - Pension and Other Postretirement Benefits (Tables) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsTables Pension and Other Postretirement Benefits (Tables) Tables http://www.kennametal.com/role/PensionandOtherPostretirementBenefits 48 false false R49.htm 9955524 - Disclosure - Accumulated Other Comprehensive Loss (Tables) Sheet http://www.kennametal.com/role/AccumulatedOtherComprehensiveLossTables Accumulated Other Comprehensive Loss (Tables) Tables http://www.kennametal.com/role/AccumulatedOtherComprehensiveLoss 49 false false R50.htm 9955525 - Disclosure - Restructuring and Other Charges, Net (Tables) Sheet http://www.kennametal.com/role/RestructuringandOtherChargesNetTables Restructuring and Other Charges, Net (Tables) Tables http://www.kennametal.com/role/RestructuringandOtherChargesNet 50 false false R51.htm 9955526 - Disclosure - Stock-Based Compensation (Tables) Sheet http://www.kennametal.com/role/StockBasedCompensationTables Stock-Based Compensation (Tables) Tables http://www.kennametal.com/role/StockBasedCompensation 51 false false R52.htm 9955527 - Disclosure - Segment Data (Tables) Sheet http://www.kennametal.com/role/SegmentDataTables Segment Data (Tables) Tables http://www.kennametal.com/role/SegmentData 52 false false R53.htm 9955529 - Disclosure - Summary Of Significant Accounting Policies - Property, Plant and Equipment (Details) Sheet http://www.kennametal.com/role/SummaryOfSignificantAccountingPoliciesPropertyPlantandEquipmentDetails Summary Of Significant Accounting Policies - Property, Plant and Equipment (Details) Details 53 false false R54.htm 9955530 - Disclosure - Summary of Significant Accounting Policies - Earnings Per Share (Details) Sheet http://www.kennametal.com/role/SummaryofSignificantAccountingPoliciesEarningsPerShareDetails Summary of Significant Accounting Policies - Earnings Per Share (Details) Details 54 false false R55.htm 9955531 - Disclosure - Summary of Significant Accounting Policies - Revenue Recognition (Details) Sheet http://www.kennametal.com/role/SummaryofSignificantAccountingPoliciesRevenueRecognitionDetails Summary of Significant Accounting Policies - Revenue Recognition (Details) Details 55 false false R56.htm 9955532 - Disclosure - Summary Of Significant Accounting Policies - Research and Development Costs (Details) Sheet http://www.kennametal.com/role/SummaryOfSignificantAccountingPoliciesResearchandDevelopmentCostsDetails Summary Of Significant Accounting Policies - Research and Development Costs (Details) Details 56 false false R57.htm 9955533 - Disclosure - Summary Of Significant Accounting Policies - Currency Translation (Details) Sheet http://www.kennametal.com/role/SummaryOfSignificantAccountingPoliciesCurrencyTranslationDetails Summary Of Significant Accounting Policies - Currency Translation (Details) Details 57 false false R58.htm 9955534 - Disclosure - Supplemental Cash Flow Information (Details) Sheet http://www.kennametal.com/role/SupplementalCashFlowInformationDetails Supplemental Cash Flow Information (Details) Details http://www.kennametal.com/role/SupplementalCashFlowInformationTables 58 false false R59.htm 9955535 - Disclosure - Debt - Narrative (Details) Sheet http://www.kennametal.com/role/DebtNarrativeDetails Debt - Narrative (Details) Details 59 false false R60.htm 9955536 - Disclosure - Debt - Outstanding Obligations Under Supplier Finance Program (Details) Sheet http://www.kennametal.com/role/DebtOutstandingObligationsUnderSupplierFinanceProgramDetails Debt - Outstanding Obligations Under Supplier Finance Program (Details) Details 60 false false R61.htm 9955537 - Disclosure - Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) Sheet http://www.kennametal.com/role/FairValueMeasurementsAssetsandLiabilitiesMeasuredonRecurringBasisDetails Fair Value Measurements - Assets and Liabilities Measured on Recurring Basis (Details) Details 61 false false R62.htm 9955538 - Disclosure - Derivative Instruments and Hedging Activities - Fair Value of Derivatives Designated and Note Designated as Hedging Instruments (Details) Sheet http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivitiesFairValueofDerivativesDesignatedandNoteDesignatedasHedgingInstrumentsDetails Derivative Instruments and Hedging Activities - Fair Value of Derivatives Designated and Note Designated as Hedging Instruments (Details) Details 62 false false R63.htm 9955539 - Disclosure - Derivative Instruments and Hedging Activities - Derivatives Not Designated as Hedging Instruments (Details) Sheet http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivitiesDerivativesNotDesignatedasHedgingInstrumentsDetails Derivative Instruments and Hedging Activities - Derivatives Not Designated as Hedging Instruments (Details) Details 63 false false R64.htm 9955540 - Disclosure - Derivative Instruments and Hedging Activities - Narrative (Details) Sheet http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivitiesNarrativeDetails Derivative Instruments and Hedging Activities - Narrative (Details) Details 64 false false R65.htm 9955541 - Disclosure - Derivative Instruments and Hedging Activities - Cash Flow Hedges (Details) Sheet http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivitiesCashFlowHedgesDetails Derivative Instruments and Hedging Activities - Cash Flow Hedges (Details) Details 65 false false R66.htm 9955542 - Disclosure - Derivative Instruments and Hedging Activities - Losses (gains) related to Derivatives Not Designated as Hedging Instruments and to Cash Flow Hedges (Details) Sheet http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivitiesLossesgainsrelatedtoDerivativesNotDesignatedasHedgingInstrumentsandtoCashFlowHedgesDetails Derivative Instruments and Hedging Activities - Losses (gains) related to Derivatives Not Designated as Hedging Instruments and to Cash Flow Hedges (Details) Details http://www.kennametal.com/role/DerivativeInstrumentsandHedgingActivitiesTables 66 false false R67.htm 9955543 - Disclosure - Inventories (Details) Sheet http://www.kennametal.com/role/InventoriesDetails Inventories (Details) Details http://www.kennametal.com/role/InventoriesTables 67 false false R68.htm 9955544 - Disclosure - Goodwill and Other Intangible Assets - Narrative (Details) Sheet http://www.kennametal.com/role/GoodwillandOtherIntangibleAssetsNarrativeDetails Goodwill and Other Intangible Assets - Narrative (Details) Details 68 false false R69.htm 9955545 - Disclosure - Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) Sheet http://www.kennametal.com/role/GoodwillandOtherIntangibleAssetsScheduleofGoodwillDetails Goodwill and Other Intangible Assets - Schedule of Goodwill (Details) Details 69 false false R70.htm 9955546 - Disclosure - Goodwill and Other Intangible Assets Other Intangible Assets (Details) Sheet http://www.kennametal.com/role/GoodwillandOtherIntangibleAssetsOtherIntangibleAssetsDetails Goodwill and Other Intangible Assets Other Intangible Assets (Details) Details 70 false false R71.htm 9955547 - Disclosure - Leases - Narrative (Details) Sheet http://www.kennametal.com/role/LeasesNarrativeDetails Leases - Narrative (Details) Details 71 false false R72.htm 9955548 - Disclosure - Leases - Operating Leases Supplemental Balance Sheet Information (Details) Sheet http://www.kennametal.com/role/LeasesOperatingLeasesSupplementalBalanceSheetInformationDetails Leases - Operating Leases Supplemental Balance Sheet Information (Details) Details 72 false false R73.htm 9955549 - Disclosure - Leases - Operating Leases Supplemental Cash Flow Information (Details) Sheet http://www.kennametal.com/role/LeasesOperatingLeasesSupplementalCashFlowInformationDetails Leases - Operating Leases Supplemental Cash Flow Information (Details) Details 73 false false R74.htm 9955550 - Disclosure - Leases - Maturities of Operating Lease Liabilities (Details) Sheet http://www.kennametal.com/role/LeasesMaturitiesofOperatingLeaseLiabilitiesDetails Leases - Maturities of Operating Lease Liabilities (Details) Details 74 false false R75.htm 9955551 - Disclosure - Other Current Assets And Liabilities - Other Current Assets (Details) Sheet http://www.kennametal.com/role/OtherCurrentAssetsAndLiabilitiesOtherCurrentAssetsDetails Other Current Assets And Liabilities - Other Current Assets (Details) Details 75 false false R76.htm 9955552 - Disclosure - Other Current Assets And Liabilities - Other Current Liabilities (Details) Sheet http://www.kennametal.com/role/OtherCurrentAssetsAndLiabilitiesOtherCurrentLiabilitiesDetails Other Current Assets And Liabilities - Other Current Liabilities (Details) Details 76 false false R77.htm 9955553 - Disclosure - Long-Term Debt (Details) Sheet http://www.kennametal.com/role/LongTermDebtDetails Long-Term Debt (Details) Details http://www.kennametal.com/role/LongTermDebtTables 77 false false R78.htm 9955554 - Disclosure - Long -Term Debt - Narrative (Details) Sheet http://www.kennametal.com/role/LongTermDebtNarrativeDetails Long -Term Debt - Narrative (Details) Details 78 false false R79.htm 9955555 - Disclosure - Revolving and Other Lines of Credit and Notes Payable (Details) Notes http://www.kennametal.com/role/RevolvingandOtherLinesofCreditandNotesPayableDetails Revolving and Other Lines of Credit and Notes Payable (Details) Details http://www.kennametal.com/role/RevolvingandOtherLinesofCreditandNotesPayable 79 false false R80.htm 9955556 - Disclosure - Income Taxes - Effective Tax Rate (Details) Sheet http://www.kennametal.com/role/IncomeTaxesEffectiveTaxRateDetails Income Taxes - Effective Tax Rate (Details) Details 80 false false R81.htm 9955557 - Disclosure - Income Taxes - Reconciliation of Income Taxes (Details) Sheet http://www.kennametal.com/role/IncomeTaxesReconciliationofIncomeTaxesDetails Income Taxes - Reconciliation of Income Taxes (Details) Details 81 false false R82.htm 9955558 - Disclosure - Income Taxes - Reconciliation of Income Taxes (Details) Sheet http://www.kennametal.com/role/IncomeTaxesReconciliationofIncomeTaxesDetails_1 Income Taxes - Reconciliation of Income Taxes (Details) Details 82 false false R83.htm 9955559 - Disclosure - Income Taxes - Narrative (Details) Sheet http://www.kennametal.com/role/IncomeTaxesNarrativeDetails Income Taxes - Narrative (Details) Details 83 false false R84.htm 9955560 - Disclosure - Income Taxes - Components of Net Deferred Tax Liabilities (Details) Sheet http://www.kennametal.com/role/IncomeTaxesComponentsofNetDeferredTaxLiabilitiesDetails Income Taxes - Components of Net Deferred Tax Liabilities (Details) Details 84 false false R85.htm 9955561 - Disclosure - Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) Sheet http://www.kennametal.com/role/IncomeTaxesReconciliationofUnrecognizedTaxBenefitsDetails Income Taxes - Reconciliation of Unrecognized Tax Benefits (Details) Details 85 false false R86.htm 9955562 - Disclosure - Pension and Other Postretirement Benefits - Narrative (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsNarrativeDetails Pension and Other Postretirement Benefits - Narrative (Details) Details 86 false false R87.htm 9955563 - Disclosure - Pension and Other Postretirement Benefits - Funded Status of Pension Plans and Amounts Recognized in the Consolidated Balance Sheets (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsFundedStatusofPensionPlansandAmountsRecognizedintheConsolidatedBalanceSheetsDetails Pension and Other Postretirement Benefits - Funded Status of Pension Plans and Amounts Recognized in the Consolidated Balance Sheets (Details) Details 87 false false R88.htm 9955564 - Disclosure - Pension and Other Postretirement Benefits - Amounts Related to Defined Pension Plans Recognized in Accumulated Other Comprehensive (Loss) Income (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsAmountsRelatedtoDefinedPensionPlansRecognizedinAccumulatedOtherComprehensiveLossIncomeDetails Pension and Other Postretirement Benefits - Amounts Related to Defined Pension Plans Recognized in Accumulated Other Comprehensive (Loss) Income (Details) Details 88 false false R89.htm 9955565 - Disclosure - Pension and Other Postretirement Benefits - Plans with Accumulated Benefit Obligations Exceeding the Fair Value of Plan Assets (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsPlanswithAccumulatedBenefitObligationsExceedingtheFairValueofPlanAssetsDetails Pension and Other Postretirement Benefits - Plans with Accumulated Benefit Obligations Exceeding the Fair Value of Plan Assets (Details) Details 89 false false R90.htm 9955566 - Disclosure - Pension and Other Postretirement Benefits - Components of Net Periodic Pension (Income) Cost (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsComponentsofNetPeriodicPensionIncomeCostDetails Pension and Other Postretirement Benefits - Components of Net Periodic Pension (Income) Cost (Details) Details 90 false false R91.htm 9955567 - Disclosure - Pension and Other Postretirement Benefits - Funded Status of Other Postretirement Benefit Plans and Amounts Recognized in the Consolidated Balance Sheets (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsFundedStatusofOtherPostretirementBenefitPlansandAmountsRecognizedintheConsolidatedBalanceSheetsDetails Pension and Other Postretirement Benefits - Funded Status of Other Postretirement Benefit Plans and Amounts Recognized in the Consolidated Balance Sheets (Details) Details 91 false false R92.htm 9955568 - Disclosure - Pension and Other Postretirement Benefits - Amounts Related to Other Postretirement Benefit Plans Recognized in Accumulated Other Comprehensive (Loss) Income (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsAmountsRelatedtoOtherPostretirementBenefitPlansRecognizedinAccumulatedOtherComprehensiveLossIncomeDetails Pension and Other Postretirement Benefits - Amounts Related to Other Postretirement Benefit Plans Recognized in Accumulated Other Comprehensive (Loss) Income (Details) Details 92 false false R93.htm 9955569 - Disclosure - Pension and Other Postretirement Benefits - Components of Net Periodic Other Postretirement Benefit Cost (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsComponentsofNetPeriodicOtherPostretirementBenefitCostDetails Pension and Other Postretirement Benefits - Components of Net Periodic Other Postretirement Benefit Cost (Details) Details 93 false false R94.htm 9955570 - Disclosure - Pension and Other Postretirement Benefits - Schedule of Assumptions (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsScheduleofAssumptionsDetails Pension and Other Postretirement Benefits - Schedule of Assumptions (Details) Details 94 false false R95.htm 9955571 - Disclosure - Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits - Allocation of Plan Assets (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsPensionandOtherPostretirementBenefitsAllocationofPlanAssetsDetails Pension and Other Postretirement Benefits Pension and Other Postretirement Benefits - Allocation of Plan Assets (Details) Details 95 false false R96.htm 9955572 - Disclosure - Pension and Other Postretirement Benefits - Hierarchy of Fair Value of the Benefit Plan Assets (Details) Sheet http://www.kennametal.com/role/PensionandOtherPostretirementBenefitsHierarchyofFairValueoftheBenefitPlanAssetsDetails Pension and Other Postretirement Benefits - Hierarchy of Fair Value of the Benefit Plan Assets (Details) Details 96 false false R97.htm 9955573 - Disclosure - Accumulated Other Comprehensive Loss - Components of and Changes in Accumulated Other Comprehensive (Loss) Income (Details) Sheet http://www.kennametal.com/role/AccumulatedOtherComprehensiveLossComponentsofandChangesinAccumulatedOtherComprehensiveLossIncomeDetails Accumulated Other Comprehensive Loss - Components of and Changes in Accumulated Other Comprehensive (Loss) Income (Details) Details 97 false false R98.htm 9955574 - Disclosure - Accumulated Other Comprehensive Loss - Reclassifications Out of AOCL (Details) Sheet http://www.kennametal.com/role/AccumulatedOtherComprehensiveLossReclassificationsOutofAOCLDetails Accumulated Other Comprehensive Loss - Reclassifications Out of AOCL (Details) Details 98 false false R99.htm 9955575 - Disclosure - Accumulated Other Comprehensive Loss - Income Tax Allocated to Each Component of Other Comprehensive Income (Details) Sheet http://www.kennametal.com/role/AccumulatedOtherComprehensiveLossIncomeTaxAllocatedtoEachComponentofOtherComprehensiveIncomeDetails Accumulated Other Comprehensive Loss - Income Tax Allocated to Each Component of Other Comprehensive Income (Details) Details 99 false false R100.htm 9955576 - Disclosure - Restructuring and Other Charges, Net - Narrative (Details) Sheet http://www.kennametal.com/role/RestructuringandOtherChargesNetNarrativeDetails Restructuring and Other Charges, Net - Narrative (Details) Details 100 false false R101.htm 9955577 - Disclosure - Restructuring and Other Charges, Net - Restructuring Reserve by Type of Cost (Details) Sheet http://www.kennametal.com/role/RestructuringandOtherChargesNetRestructuringReservebyTypeofCostDetails Restructuring and Other Charges, Net - Restructuring Reserve by Type of Cost (Details) Details 101 false false R102.htm 9955578 - Disclosure - Financial Instruments (Details) Sheet http://www.kennametal.com/role/FinancialInstrumentsDetails Financial Instruments (Details) Details http://www.kennametal.com/role/FinancialInstruments 102 false false R103.htm 9955579 - Disclosure - Stock-Based Compensation - Changes in Stock Options (Details) Sheet http://www.kennametal.com/role/StockBasedCompensationChangesinStockOptionsDetails Stock-Based Compensation - Changes in Stock Options (Details) Details 103 false false R104.htm 9955580 - Disclosure - Stock-Based Compensation - Changes in Restricted Stock Units (Details) Sheet http://www.kennametal.com/role/StockBasedCompensationChangesinRestrictedStockUnitsDetails Stock-Based Compensation - Changes in Restricted Stock Units (Details) Details 104 false false R105.htm 9955581 - Disclosure - Stock-Based Compensation - Narrative (Details) Sheet http://www.kennametal.com/role/StockBasedCompensationNarrativeDetails Stock-Based Compensation - Narrative (Details) Details 105 false false R106.htm 9955582 - Disclosure - Environmental Matters (Details) Sheet http://www.kennametal.com/role/EnvironmentalMattersDetails Environmental Matters (Details) Details http://www.kennametal.com/role/EnvironmentalMatters 106 false false R107.htm 9955583 - Disclosure - Commitments and Contingencies (Details) Sheet http://www.kennametal.com/role/CommitmentsandContingenciesDetails Commitments and Contingencies (Details) Details http://www.kennametal.com/role/CommitmentsandContingencies 107 false false R108.htm 9955584 - Disclosure - Segment Data - Narrative (Details) Sheet http://www.kennametal.com/role/SegmentDataNarrativeDetails Segment Data - Narrative (Details) Details 108 false false R109.htm 9955585 - Disclosure - Segment Data (Details) Sheet http://www.kennametal.com/role/SegmentDataDetails Segment Data (Details) Details http://www.kennametal.com/role/SegmentDataTables 109 false false R110.htm 9955586 - Disclosure - Segment Data - Geographic Sales Information (Details) Sheet http://www.kennametal.com/role/SegmentDataGeographicSalesInformationDetails Segment Data - Geographic Sales Information (Details) Details 110 false false R111.htm 9955587 - Disclosure - Segment Data Segment Data - Sales by End Market (Details) Sheet http://www.kennametal.com/role/SegmentDataSegmentDataSalesbyEndMarketDetails Segment Data Segment Data - Sales by End Market (Details) Details 111 false false R112.htm 9955588 - Disclosure - Selected Quarterly Financial Data (Details) Sheet http://www.kennametal.com/role/SelectedQuarterlyFinancialDataDetails Selected Quarterly Financial Data (Details) Details 112 false false R113.htm 9955589 - Disclosure - Divestiture (Details) Sheet http://www.kennametal.com/role/DivestitureDetails Divestiture (Details) Details http://www.kennametal.com/role/Divestiture 113 false false R114.htm 9955590 - Disclosure - Schedule II Valuation and Qualifying Accounts and Reserves (Details) Sheet http://www.kennametal.com/role/ScheduleIIValuationandQualifyingAccountsandReservesDetails Schedule II Valuation and Qualifying Accounts and Reserves (Details) Details http://www.kennametal.com/role/ScheduleIIValuationandQualifyingAccountsandReserves 114 false false All Reports Book All Reports kmt-20260630.htm kmt-20260630.xsd kmt-20260630_cal.xml kmt-20260630_def.xml kmt-20260630_lab.xml kmt-20260630_pre.xml kmt-20260630_g1.jpg http://fasb.org/srt/2026 http://fasb.org/us-gaap/2026 http://xbrl.sec.gov/cyd/2026 http://xbrl.sec.gov/dei/2026 http://xbrl.sec.gov/ecd/2026 true true