Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Quarterly Financial Data [Abstract]
Sales	$ 2,046,899	$ 2,078,184	$ 2,012,456
Gross profit	627,093	646,439	647,977
Net income attributable to Kennametal	$ 109,323	$ 118,459	$ 144,623
Basic earnings per share attributable to Kennametal	$ 1.38	$ 1.47	$ 1.74
Diluted earnings per share attributable to Kennametal	$ 1.37	$ 1.46	$ 1.72