Related Party Disclosures (Details) $ in Millions	6 Months Ended
Dec. 31, 2020 USD ($) member	Dec. 31, 2019 USD ($)
Related Party Transaction [Line Items]
Members of company board of directors serving on GEG board of directors \| member	2
GEG
Related Party Transaction [Line Items]
Related party purchase \| $	$ 0.0	$ 1.1

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.

No definition available.

Name:	us-gaap_RelatedPartyTransactionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration