CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2017
Statement of Comprehensive Income [Abstract]
Net income	$ 247,876	$ 205,060	$ 51,980
Unrealized gain (loss) on derivatives designated and qualified as cash flow hedges	197	(922)	(471)
Reclassification of unrealized loss on expired derivatives designated and qualified as cash flow hedges	1,348	3,747	1,557
Unrecognized net pension and other postretirement benefit (loss) gain	(39,639)	(5,991)	15,559
Reclassification of net pension and other postretirement benefit loss	5,124	7,274	7,566
Foreign currency translation adjustments	(20,785)	(1,490)	5,888
Other comprehensive (loss) income, net of tax	(53,755)	2,618	30,099
Total comprehensive income	194,121	207,678	82,079
Less: comprehensive income attributable to noncontrolling interests	(5,414)	(4,131)	(4,124)
Comprehensive income attributable to Kennametal Shareholders	$ 188,707	$ 203,547	$ 77,955