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Goodwill and Other Intangible Assets - Carrying Amount of Goodwill Attributable to Each Segment (Details) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Mar. 31, 2018 | Jun. 30, 2017
Goodwill [Roll Forward] |  |
Goodwill | $ 1,093,486 | $ 1,085,420
Accumulated impairment losses | (784,053) | (784,053)
Goodwill, Beginning Balance | 301,367 |
Goodwill, Foreign Currency Translation Gain (Loss) | 8,066 |
Goodwill, Ending Balance | 309,433 |
Industrial [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 418,305 | 410,694
Accumulated impairment losses | (137,204) | (137,204)
Goodwill, Beginning Balance | 273,490 |
Goodwill, Foreign Currency Translation Gain (Loss) | 7,611 |
Goodwill, Ending Balance | 281,101 |
Infrastructure [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 633,211 | 633,211
Accumulated impairment losses | (633,211) | (633,211)
Goodwill, Beginning Balance | 0 |
Goodwill, Foreign Currency Translation Gain (Loss) | 0 |
Goodwill, Ending Balance | 0 |
WIDIA [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 41,970 | 41,515
Accumulated impairment losses | (13,638) | $ (13,638)
Goodwill, Beginning Balance | 27,877 |
Goodwill, Foreign Currency Translation Gain (Loss) | 455 |
Goodwill, Ending Balance | $ 28,332 |

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- Definition Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6388280&loc=d3e13770-109266 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=77989000&loc=SL49117168-202975 + Details
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- Definition Amount of foreign currency translation gain (loss) which increases (decreases) an asset representing future economic benefits from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount before accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition Amount of accumulated impairment loss for an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a,h) -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 + Details
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- Definition A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period. + References No definition available. + Details
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