Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Sep. 30, 2012	Sep. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 47,047	$ 73,573
Unrealized loss on derivatives designated and qualified as cash flow hedges, net of income tax benefit of $0.4 million and $6.6 million, respectively	(571)	(10,677)
Reclassification of unrealized loss on expired derivatives designated and qualified as cash flow hedges, net of income tax benefit of ($0.0) million and ($0.2) million, respectively	85	241
Unrecognized net pension and other postretirement benefit (loss) gain, net of income tax (benefit) expense of $0.4 million and ($0.3) million, respectively	(1,118)	848
Reclassification of net pension and other postretirement benefit loss, net of income tax benefit of ($1.4) million and ($0.7) million, respectively	2,414	1,287
Foreign currency translation adjustments, net of income tax (expense) benefit of ($18.9) million and $41.8 million, respectively	25,080	(69,877)
Total comprehensive income (loss)	72,937	(4,605)
Comprehensive income (loss) attributable to noncontrolling interests	1,287	(114)
Comprehensive income (loss) attributable to Kennametal Shareowners	$ 71,650	$ (4,491)