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Divestiture (Notes)	9 Months Ended
Divestiture (Notes)	Mar. 31, 2020
Divestiture [Abstract]
Mergers, Acquisitions and Dispositions Disclosures [Text Block]	DIVESTITURE During the nine months ended March 31, 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 three months ended December 31, 2019 was $6.5 million. Transaction proceeds were primarily used for capital expenditures related to our simplification/modernization efforts.