Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2011
Statement of Other Comprehensive Income [Abstract]
Net income	$ 206,916	$ 310,833	$ 232,277
Unrealized loss on derivatives designated and qualified as cash flow hedges, net of income tax benefit	(611)	(11,165)	(820)
Reclassification of unrealized loss (gain) on expired derivatives designated and qualified as cash flow hedges, net of income tax benefit (expense)	1,377	(186)	783
Unrecognized net pension and other postretirement benefit gain (loss), net of income tax (expense) benefit	39,376	(90,686)	28,087
Reclassification of net pension and other postretirement benefit losses, net of income tax benefit	9,679	5,964	7,131
Foreign currency translation adjustments, net of income tax benefit (expense)	9,223	(140,797)	122,358
Total comprehensive income	265,960	73,963	389,816
Less: comprehensive income (loss) attributable to noncontrolling interests	3,101	(76)	4,779
Comprehensive income attributable to Kennametal Shareowners	$ 262,859	$ 74,039	$ 385,037