CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (UNAUDITED) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Net income (loss)	$ 32,725	$ 20,250	$ 70,477	$ (610)
Other comprehensive income (loss), net of tax [Abstract]
Unrecognized net pension and other postretirement benefit gain (loss)	876	(4,211)	2,781	(7,521)
Reclassification of net pension and other postretirement benefit loss	2,201	2,614	4,416	5,179
Foreign currency translation adjustments	(10,081)	42,601	(26,557)	74,547
Total other comprehensive income (loss), net of tax	(7,196)	44,774	(19,745)	77,646
Total comprehensive income	25,529	65,024	50,732	77,036
Less: comprehensive income (loss) attributable to noncontrolling interests	855	2,218	1,954	4,312
Comprehensive income (loss) attributable to Kennametal Shareholders	24,674	62,806	48,778	72,724
Accumulated Other Comprehensive (Loss) Income [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	63	(155)	126	(305)
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, after Tax	(192)	479	(385)	940
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), after Reclassification and Tax	0	3,291	0	4,501
Reclassification out of Accumulated Other Comprehensive Loss [Member] | Accumulated Net (Loss) Gain from Designated or Qualifying Cash Flow Hedges [Member]
Accumulated Other Comprehensive (Loss) Income [Line Items]
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), Reclassification, Tax	$ 63	$ (155)	$ 126	$ (305)