For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
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-Name Accounting Standards Codification
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Name:	us-gaap_ConcentrationRiskPercentage1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Business Segments - Narrative (Details) - segment	3 Months Ended	9 Months Ended		12 Months Ended
Business Segments - Narrative (Details) - segment	Mar. 31, 2020	Mar. 31, 2021	Mar. 31, 2020	Jun. 30, 2020
Concentration Risk [Line Items]
Number of reportable segments		2
Customer Concentration Risk \| Revenue \| Howmet Aerospace Inc.
Concentration Risk [Line Items]
Concentration risk	10.00%		10.00%
Customer Concentration Risk \| Accounts Receivable \| Howmet Aerospace Inc.
Concentration Risk [Line Items]
Concentration risk				10.00%