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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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- Definition

Business acquisitions net income (loss).

+ References

No definition available.

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- Definition

Business acquisitions revenue.

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No definition available.

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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.

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