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Acquisition - Unaudited Pro Forma Financial Information (Details) - TMB [Member] - USD ($) $ / shares in Units, $ in Thousands | 12 Months Ended
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Jun. 30, 2014 | Jun. 30, 2013
Pro forma operating results |  |
Net Sales | $ 2,941,005 | $ 2,902,160
Net income attributable to Kennametal | $ 175,804 | $ 190,863
Per share data attributable to Kennametal Shareholders: |  |
Basic earnings per share | $ 2.23 | $ 2.40
Diluted earnings per share | $ 2.21 | $ 2.37

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