Consolidation and Nature of Operations - Additional Information (Details) - Variable Interest Entity - APS - trust	Mar. 31, 2026	Sep. 30, 2025	Dec. 31, 1986
Utility Plant and Depreciation [Line Items]
Number of VIE lessor trusts acquired		2
Number of VIE lessor trusts	1		3

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