Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2021
Quarterly Financial Data [Abstract]
Sales	$ 2,078,184	$ 2,012,456	$ 1,841,441
Gross profit	646,439	647,977	552,478
Net income attributable to Kennametal	$ 118,459	$ 144,623	$ 54,434
Basic earnings per share attributable to Kennametal	$ 1.47	$ 1.74	$ 0.65
Diluted earnings per share attributable to Kennametal	$ 1.46	$ 1.72	$ 0.65