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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, 2020 | Dec. 31, 2019 | Jun. 30, 2020
Goodwill [Line Items] |  |  |
Goodwill and Intangible Asset Impairment |  | $ 14,600 |
Goodwill [Roll Forward] |  |  |
Gross goodwill | $ 1,092,319 |  | $ 1,081,452
Accumulated impairment losses | (810,872) |  | (810,872)
Goodwill, Beginning Balance | 270,580 |  |
Change in gross goodwill due to translation | 10,867 |  |
Goodwill, Ending Balance | 281,447 |  |
Infrastructure [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Gross goodwill | 633,211 |  | 633,211
Accumulated impairment losses | (633,211) |  | (633,211)
Goodwill, Beginning Balance | 0 |  |
Change in gross goodwill due to translation | 0 |  |
Goodwill, Ending Balance | 0 |  |
Metal Cutting |  |  |
Goodwill [Roll Forward] |  |  |
Gross goodwill | 459,108 |  | 448,241
Accumulated impairment losses | (177,661) |  | $ (177,661)
Goodwill, Beginning Balance | 270,580 |  |
Change in gross goodwill due to translation | 10,867 |  |
Goodwill, Ending Balance | $ 281,447 |  |
WIDIA [Member] |  |  |
Goodwill [Roll Forward] |  |  |
Impairment charges |  | 13,100 |
Impairment of Intangible Assets, Indefinite-lived (Excluding Goodwill) |  | $ 1,500 |

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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/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(10)(1)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 Reference 2: 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=120320667&loc=SL49117168-202975 Reference 3: 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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