Restructuring and Asset Impairment Charges - Narrative (Details)	3 Months Ended
Sep. 30, 2020 USD ($) facility	Sep. 30, 2019 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring and asset impairment charges	$ 10,000,000.0	$ 0
Non-cash asset impairment charges	8,700,000
Restructuring charges	$ 1,300,000
Fixed Cost Reduction
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated, period percent	20.00%
Facility Closing
Restructuring Cost and Reserve [Line Items]
Number of small domestic power metals production facilities closed \| facility	2

Non-cash Asset Impairment Charges

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- Definition

Restructuring And Related Cost, Number Of Power Production Facilities Closed

+ References

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- Definition

The number of positions eliminated during the period as a percentage of total positions eliminated during the period in connection with the restructuring plan(s).

+ References

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- Definition

Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

+ References

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Amount, after cash payment, of expenses associated with exit or disposal activities pursuant to an authorized plan and expenses resulting from the write-down of assets. Excludes expenses related to a business combination, a discontinued operation or an asset retirement obligation.

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