Condensed Consolidated Statements of Comprehensive Income (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Statement of Comprehensive Income [Abstract]
Net income	$ 51,994	$ 54,376	$ 114,719	$ 144,732
Unrealized (loss) gain on derivatives designated and qualified as cash flow hedges, net of income tax benefit (expense) of $0.0 million, ($0.1) million, $0.5 million and $0.3 million, respectively	(8)	212	(851)	(461)
Reclassification of unrealized loss on expired derivatives designated and qualified as cash flow hedges, net of income tax benefit of $0.4 million, $0.3 million, $0.9 million and $0.6 million, respectively	659	556	1,508	934
Unrecognized net pension and other postretirement benefit (loss) gain, net of income tax benefit (expense) of $0.0 million, ($0.6) million, $1.0 million and ($0.1) million, respectively	(104)	1,918	(2,880)	438
Reclassification of net pension and other postretirement benefit loss, net of income tax benefit of $0.2 million, $1.4 million, $0.6 million and $4.1 million, respectively	495	2,392	1,477	7,227
Foreign currency translation adjustments, net of income tax benefit (expense) of $0.0 million, $0.4 million, ($2.1) million and ($1.2) million, respectively	(4,108)	(34,258)	35,477	4,187
Total comprehensive income	48,928	25,196	149,450	157,057
Comprehensive income attributable to noncontrolling interests	1,450	145	2,356	2,656
Comprehensive income attributable to Kennametal Shareowners	$ 47,478	$ 25,051	$ 147,094	$ 154,401