CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Income Statement [Abstract]
Sales	$ 1,885,305	$ 2,375,234	$ 2,367,853
Cost of goods sold	1,355,834	1,543,738	1,547,730
Gross profit	529,471	831,496	820,123
Operating expense	388,436	474,151	503,249
Restructuring charges	68,228	14,084	11,907
Goodwill and other intangible assets impairments	30,227
Loss on divestiture	6,517
Amortization of intangibles	13,811	14,411	14,668
Operating income	22,252	328,850	290,299
Interest expense	35,154	32,994	30,081
Other income, net	(14,862)	(15,379)	(14,823)
Income before income taxes	1,960	311,235	275,041
Provision for income taxes	7,007	63,359	69,981
Net (loss) income	(5,047)	247,876	205,060
Less: Net income attributable to noncontrolling interests	614	5,951	4,880
Net (loss) income attributable to Kennametal	$ (5,661)	$ 241,925	$ 200,180
PER SHARE DATA ATTRIBUTABLE TO KENNAMETAL SHAREHOLDERS
Basic (loss) earnings per share	$ (0.07)	$ 2.94	$ 2.45
Diluted (loss) earnings per share	(0.07)	2.90	2.42
Dividends per share	$ 0.80	$ 0.80	$ 0.80
Basic weighted average shares outstanding	83,047	82,379	81,544
Diluted weighted average shares outstanding	83,047	83,291	82,754