Divestiture (Notes)	6 Months Ended
Dec. 31, 2021
Divestiture [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	DIVESTITUREDuring the year ended June 30, 2020, we completed the sale of certain assets of the non-core specialty alloys and metals business within the Infrastructure segment located in New Castle, Pennsylvania to Advanced Metallurgical Group N.V. for an aggregate price of $24.0 million.The net book value of these assets at closing was $29.5 million, and the pre-tax loss on divestiture recognized during the year ended June 30, 2020 was $6.5 million. Transaction proceeds were primarily used for capital expenditures related to our simplification/modernization efforts. During the quarter ended December 31, 2021, we recorded a gain of $1.0 million on the New Castle divestiture due to proceeds held in escrow until November 2021.

The entire disclosure for business combinations, including leverage buyout transactions (as applicable), and divestitures. This may include a description of a business combination or divestiture (or series of individually immaterial business combinations or divestitures) completed during the period, including background, timing, and assets and liabilities recognized and reclassified or sold. This element does not include fixed asset sales and plant closings.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 205
-SubTopic 20
-URI http://asc.fasb.org/subtopic&trid=2122178

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-URI http://asc.fasb.org/topic&trid=2303972

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