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Acquisition (Details Textual) (TMB [Member], USD $) | 6 Months Ended |
--- | --- | ---
Dec. 31, 2014 | Nov. 04, 2013
TMB [Member] |  |
Acquisitions (Textual) [Abstract] |  |
Purchase Price |  | $ 607,000,000us-gaap_SignificantAcquisitionsAndDisposalsAcquisitionCostsOrSaleProceeds / us-gaap_BusinessAcquisitionAxis = kmt_TMBMember
Net sales | 123,307,000kmt_BusinessAcquisitionsRevenue / us-gaap_BusinessAcquisitionAxis = kmt_TMBMember |
Net income attributable to Kennametal | $ (6,107,000)kmt_BusinessAcquisitionsNetIncomeNetLoss / us-gaap_BusinessAcquisitionAxis = kmt_TMBMember |

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- Details
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- Definition Business acquisitions net income (loss). + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Business acquisitions revenue. + References No definition available. + Details
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Balance Type: | credit
Period Type: | duration

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- Definition The value of all consideration given or received by the Entity in the significant acquisition or disposal. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
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