Commitments And Contingencies (Narrative) (Details)	3 Months Ended
Dec. 31, 2021
Naming Rights
Other Commitments [Line Items]
Term of agreement	20 years
Donation Commitments
Other Commitments [Line Items]
Term of agreement	15 years

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