Leases - Schedule of Balance Sheet and Weighted Average Information About Operating Leases (Details) (Parentheticals)	Sep. 30, 2025	Sep. 30, 2024
Operating Lease, Right-of-Use Asset, Statement of Financial Position [Extensible Enumeration]	Regulatory and Other Assets, Noncurrent	Regulatory and Other Assets, Noncurrent
US Operating Lease, Liability, Current, Statement of Financial Position [Extensible Enumeration]	Other Liabilities Current	Other Liabilities Current
Operating Lease, Liability, Noncurrent, Statement of Financial Position [Extensible Enumeration]	Other libilities	Other libilities