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Goodwill and Other Intangible Assets - Carrying Amount of Goodwill Attributable to Each Segment (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Dec. 31, 2018 | Jun. 30, 2018
Goodwill [Roll Forward] |  |
Goodwill | $ 1,084,056 | $ 1,085,855
Accumulated impairment losses | (784,053) | (784,053)
Goodwill, Beginning Balance | 301,802 |
Goodwill, Foreign Currency Translation Gain (Loss) | (1,799) |
Goodwill, Ending Balance | 300,003 |
Industrial [Member] |  |
Goodwill [Roll Forward] |  |
Goodwill | 409,854 | 411,458
Accumulated impairment losses | (137,204) | (137,204)
Goodwill, Beginning Balance | 274,254 |
Goodwill, Foreign Currency Translation Gain (Loss) | (1,604) |
Goodwill, Ending Balance | 272,650 |
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 | 40,991 | 41,186
Accumulated impairment losses | (13,638) | $ (13,638)
Goodwill, Beginning Balance | 27,548 |
Goodwill, Foreign Currency Translation Gain (Loss) | (195) |
Goodwill, Ending Balance | $ 27,353 |

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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://fasb.org/us-gaap/role/ref/legacyRef -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 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=99380562&loc=d3e13770-109266 + 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://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=108376223&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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108376223&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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=108376223&loc=d3e13816-109267 + Details
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