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Document and Entity Information
Aug. 26, 2020
Document Information [Line Items]  
Amendment Flag false
Entity Central Index Key 0000055242
Document Type 8-K
Document Period End Date Aug. 26, 2020
Entity Registrant Name Kennametal Inc.
Entity Incorporation, State or Country Code PA
Entity File Number 1-5318
Entity Tax Identification Number 25-0900168
Entity Address, Address Line One 525 William Penn Place
Entity Address, Address Line Two Suite 3300
Entity Address, City or Town Pittsburgh
Entity Address, State or Province PA
Entity Address, Postal Zip Code 15219
City Area Code 412
Local Phone Number 248-8000
Written Communications false
Soliciting Material false
Pre-commencement Tender Offer false
Pre-commencement Issuer Tender Offer false
Entity Emerging Growth Company false
Capital Stock, par value $1.25 per share [Member]  
Document Information [Line Items]  
Title of 12(b) Security Capital Stock, par value $1.25 per share
Trading Symbol KMT
Security Exchange Name NYSE
Preferred Stock Purchase Rights [Member]  
Document Information [Line Items]  
No Trading Symbol Flag true
Title of 12(b) Security Preferred Stock Purchase Rights
Security Exchange Name NYSE