Entity tax identification number Entity Tax Identification Number Investments at fair value EBP, Investment, Fair Value Rollovers EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution, Rollover Maximum Maximum [Member] Legal Entity [Axis] Legal Entity [Axis] Statistical Measurement [Domain] Statistical Measurement [Domain] EBP, Description of Plan [Table] EBP, Description of Plan [Table] Mutual funds Mutual Fund [Member] Investment sold, excluding plan interest in master trust, selling price EBP, Investment Sold, Excluding Plan Interest in Master Trust, Selling Price EBP, Related Party and Party-in-Interest Transactions [Table] EBP, Related Party and Party-in-Interest Transactions [Table] Self-directed brokerage account EBP, Self-Directed Brokerage Account [Member] Total deductions EBP, Change in Net Asset Available for Benefit, Decrease Note receivable from participant, account, maximum borrowing, amount EBP, Note Receivable from Participant, Account, Maximum Borrowing, Amount FAIR VALUE MEASUREMENT EBP, Investment, Fair Value and NAV [Text Block] Note receivable from participants, account, minimum borrowing, amount EBP, Note Receivable from Participant, Account, Minimum Borrowing, Amount EBP 002 EBP 002 [Member] EBP 002 Investment, excluding plan interest in master trust, fair value EBP, Investment, Excluding Plan Interest in Master Trust, Fair Value Plan's Divided Interest in Master Trust Balances EBP, Nonconsolidated, Plan Interest in Master Trust [Member] Level 1 Fair Value, Inputs, Level 1 [Member] EBP, Investment, Fair Value and NAV [Abstract] Statistical Measurement [Axis] Statistical Measurement [Axis] ADDITIONS EBP, Change in Net Asset Available for Benefit, Increase [Abstract] EBP, Statement of Change in Net Asset Available for Benefit [Table] EBP, Statement of Change in Net Asset Available for Benefit [Table] PAYMENT OF BENEFITS EBP, Payment to Participant [Policy Text Block] EBP, Master Trust [Line Items] EBP, Master Trust [Line Items] Amendment Flag Amendment Flag Participants EBP, Change in Net Asset Available for Benefit, Increase from Participant Contribution BASIS OF ACCOUNTING EBP, Basis of Accounting [Policy Text Block] U.S. government securities US Government Debt Securities [Member] EBP, Schedule of Asset Held for Investment [Table] EBP, Schedule of Asset Held for Investment [Table] TOTAL INVESTMENTS EBP, Investment, Plan Interest in Master Trust, Fair and Contract Value Investment, number of shares EBP, Investment, Number of Shares EBP, Description of Plan and Accounting Change [Abstract] RECEIVABLES EBP, Receivable [Abstract] Schedule of Fair Value Hierarchy EBP, Investment, Fair Value and NAV [Table Text Block] Master trust investments EBP, Risk and Uncertainty, Concentration of Investment at Fair Value to Total Investments, Amount Common stocks Common Stock [Member] Investments [Domain] Investments [Domain] EBP, Master Trust [Abstract] Plan interest in the Kennametal Inc. Master Trust fully benefit-responsive investment contracts, at contract value EBP, Investment, Plan Interest in Master Trust, Contract Value USE OF ESTIMATES EBP, Use of Estimate [Policy Text Block] SCHEDULE H, LINE 4i – SCHEDULE OF ASSETS (HELD AT END OF YEAR) EBP, Schedule of Asset Held for Investment [Text Block] Cover [Abstract] RISKS AND UNCERTAINTIES EBP, Risk and Uncertainty [Text Block] Employer EBP, Change in Net Asset Available for Benefit, Increase from Employer Contribution, Cash Investment, purchased, number of shares EBP, Investment, Purchased, Number of Shares Participant contribution, maximum contribution to eligible compensation, percentage EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage EBP, Participant Contribution, Maximum Contribution to Eligible Compensation, Percentage Participant contribution, minimum contribution to eligible compensation, percentage EBP, Participant Contribution, Minimum Contribution to Eligible Compensation, Percentage EBP, Participant Contribution, Minimum Contribution to Eligible Compensation, Percentage Minimum Minimum [Member] Investment Type [Axis] Investment Type [Axis] STABLE VALUE FUND EBP, Stable Value Fund [Text Block] EBP, Stable Value Fund Interest income on notes receivable from participants EBP, Change in Net Asset Available for Benefit, Increase from Interest Income on Note Receivable from Participant Total contributions EBP, Change in Net Asset Available for Benefit, Increase from Contribution Plan interest in the Kennametal Inc. Master Trust investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Gain (Loss) on Investment Interest and dividends EBP, Change in Net Asset Available for Benefit, Increase from Interest and Dividend Income on Investment EBP, Description of Plan [Line Items] EBP, Description of Plan [Line Items] Plan number EBP, Plan Number EBP, Investment, Fair Value and NAV [Line Items] EBP, Investment, Fair Value and NAV [Line Items] DESCRIPTION OF PLAN EBP, Description of Plan [Text Block] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Change in Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Statement of Net Asset Available for Benefit [Table] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Schedule of Asset Held for Investment [Line Items] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Domain] Kennametal Inc. capital stock EBP, Employer, Common Stock [Member] EBP, Schedule of Asset Held for Investment [Abstract] EBP, Accounting Policy [Table] EBP, Accounting Policy [Table] Total additions EBP, Change in Net Asset Available for Benefit, Increase Administrative expenses EBP, Change in Net Asset Available for Benefit, Decrease from Administrative Expense Investment, contract value EBP, Investment, Contract Value Document Information [Line Items] Document Information [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Line Items] EBP, Risk and Uncertainty [Table] EBP, Risk and Uncertainty [Table] Mutual funds EBP, Self-Directed Brokerage Account, Mutual Fund [Member] EBP, Self-Directed Brokerage Account, Mutual Fund INVESTMENT IN MASTER TRUST EBP, Master Trust [Text Block] Employer contribution, participant compensation matched, percentage EBP, Employer Contribution, Participant Compensation Matched, Percentage EBP, Statement of Change in Net Asset Available for Benefit [Abstract] Level 2 Fair Value, Inputs, Level 2 [Member] Investment, sold, number of shares EBP, Investment, Sold, Number of Shares EBP, Tax Status [Table] EBP, Tax Status [Table] NET INCREASE EBP, Change in Net Asset Available for Benefit, Increase (Decrease) RELATED PARTY TRANSACTIONS AND PARTY-IN-INTEREST TRANSACTIONS EBP, Related Party and Party-in-Interest Transactions [Text Block] Note receivable from participant, account, primary residence, maximum borrowing term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Note Receivable From Participant, Account, Primary Residence, Maximum Borrowing Term EBP, Related Party and Party-in-Interest Transactions [Abstract] EBP, Accounting Policy, Accounting Standard Update, and Change in Accounting Principle [Abstract] TOTAL RECEIVABLES EBP, Receivable Employer contributions EBP, Employer Contribution, Receivable Participant contribution, automatic, deferral rate EBP, Participant Contribution, Automatic, Deferral Rate INVESTMENTS EBP, Investment, Fair Value [Abstract] Change in net asset available for benefit, increase from dividend income on investment EBP, Change in Net Asset Available for Benefit, Increase from Dividend Income on Investment Benefits paid to participants EBP, Change in Net Asset Available for Benefit, Decrease from Payment to Participant Plan interest in the Kennametal Inc. Master Trust investments, at fair value EBP, Investment, Plan Interest in Master Trust, Fair Value Fair Value Hierarchy and NAV [Domain] Fair Value Hierarchy and NAV [Domain] EBP, Statement of Net Asset Available for Benefit [Abstract] Note receivable from participant, general loan, maximum borrowing term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term EBP, Note Receivable From Participant, General Loan, Maximum Borrowing Term Involuntary cash-out limit EBP, Distributions, Involuntary Cash-Out Limit EBP, Distributions, Involuntary Cash-Out Limit EBP, Accounting Policy [Line Items] EBP, Accounting Policy [Line Items] EBP, Tax Status [Abstract] EXPENSES EBP, Expense [Policy Text Block] PARTICIPANT LOANS EBP, Asset Held for Investment, Participant Loan, after Deemed Distribution INVESTMENT VALUATION AND INCOME RECOGNITION EBP, Investment [Policy Text Block] EBP, Master Trust [Table] EBP, Master Trust [Table] Participant contributions EBP, Participant Contribution, Receivable Fair Value, Inputs, Level 1, Level 2, and Level 3 Fair Value, Inputs, Level 1, Level 2, and Level 3 [Member] Document Type Document Type PLAN TERMINATION EBP, Plan Termination [Text Block] Entity Central Index Key Entity Central Index Key Participant loan, interest rate EBP, Asset Held for Investment, Participant Loan, Interest Rate Common/Collective trusts Common Collective Trust [Member] NET ASSETS AVAILABLE FOR BENEFITS: EBP, Net Asset Available for Benefit [Abstract] EBP, Risk and Uncertainty [Abstract] EBP, Tax Status [Line Items] EBP, Tax Status [Line Items] Cash and cash equivalents Cash and Cash Equivalents [Member] DEDUCTIONS EBP, Change in Net Asset Available for Benefit, Decrease [Abstract] Notes receivable from participants EBP, Note Receivable from Participant Master Trust Balances EBP, Nonconsolidated, Master Trust [Member] Fair Value Hierarchy and NAV [Axis] Fair Value Hierarchy and NAV [Axis] SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES EBP, Summary of Accounting Policy [Text Block] Entity Registrant Name Entity Registrant Name Schedule of master trust net assets EBP, Master Trust [Table Text Block] Investment acquired, excluding plan interest in master trust, cost EBP, Investment Acquired, Excluding Plan Interest in Master Trust, Cost Corporate bonds Bonds [Member] SUBSEQUENT EVENTS EBP, Subsequent Event [Policy Text Block] TAX STATUS EBP, Tax Status [Text Block] Note receivable from participant, account, maximum borrowing, to total account, percentage EBP, Note Receivable from Participant, Account, Maximum Borrowing, to Total Account, Percentage Document Information [Table] Document Information [Table] NOTES RECEIVABLE FROM PARTICIPANTS EBP, Note Receivable from Participant [Policy Text Block] Total investment income EBP, Change in Net Asset Available for Benefit, Increase (Decrease) from Income (Loss) on Investment EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] EBP, Nonconsolidated, Master Trust and Plan Interest in Master Trust [Axis] Participant contribution, automatic, annual increase deferral rate EBP, Participant Contribution, Automatic, Annual Increase Deferral Rate Annual increase in percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) until the contribution reaches maximum threshold. EBP, Related Party and Party-in-Interest Transactions [Line Items] EBP, Related Party and Party-in-Interest Transactions [Line Items] Level 3 Fair Value, Inputs, Level 3 [Member] NET ASSETS AVAILABLE FOR BENEFITS Beginning of year End of year EBP, Net Asset Available for Benefit Entity [Domain] Entity [Domain] Contributions: EBP, Change in Net Asset Available for Benefit, Increase from Contribution [Abstract] Employer contribution, matching percentage EBP, Employer Contribution, Matching Percentage Investments measured at NAV Fair Value Measured at Net Asset Value Per Share [Member] EBP, Investment, Fair Value and NAV [Table] EBP, Investment, Fair Value and NAV [Table] EBP, Statement of Net Asset Available for Benefit [Line Items] EBP, Statement of Net Asset Available for Benefit [Line Items]