v3.26.1
Contractual Obligations, Commercial Commitments and Contingencies (Narrative) (Details)
$ in Millions
Mar. 31, 2026
USD ($)
Utility [Member]  
Public Utility, Property, Plant and Equipment [Line Items]  
Business Combination, Indemnification Asset, Acquisition Date, Amount $ 60.8
Debt Obligation on 4.9% Equity Ownership [Member] | Subsidiaries [Member]  
Public Utility, Property, Plant and Equipment [Line Items]  
Equity ownership interest 4.90%
Equity ownership interest aggregate cost $ 44.1
Electric Generation Company [Member] | Subsidiaries [Member]  
Public Utility, Property, Plant and Equipment [Line Items]  
Debt obligation $ 899.1