Cover - shares	9 Months Ended
	Mar. 31, 2022	Apr. 29, 2022
Document Information [Line Items]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2022
Document Transition Report	false
Entity File Number	1-5318
Entity Registrant Name	KENNAMETAL INC.
Entity Incorporation, State or Country Code	PA
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
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding (in shares)		82,638,419
Entity Central Index Key	0000055242
Current Fiscal Year End Date	--06-30
Document Fiscal Year Focus	2022
Document Fiscal Period Focus	Q3
Amendment Flag	false
Capital Stock, par value $1.25 per share | New York Stock Exchange
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 | New York Stock Exchange
Document Information [Line Items]
Title of 12(b) Security	Preferred Stock Purchase Rights
Security Exchange Name	NYSE
No Trading Symbol Flag	true