Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Quarterly Financial Data [Abstract]
Sales	$ 2,012,456	$ 1,841,441	$ 1,885,305
Gross profit	647,977	552,478	529,471
Net income attributable to Kennametal	$ 144,623	$ 54,434	$ (5,661)
Basic earnings per share attributable to Kennametal	$ 1.74	$ 0.65	$ (0.07)
Diluted earnings per share attributable to Kennametal	$ 1.72	$ 0.65	$ (0.07)