Summary of Significant Accounting and Reporting Policies - Regulatory Assets and Liabilities Narrative (Details)	Dec. 31, 2023	Dec. 31, 2022
Generation Facilities And Transmission Assets
Summary of Significant Accounting Policies [Line Items]
Regulatory asset, amortization period	20 years	20 years
Deferred Clause And Franchise Expenses
Summary of Significant Accounting Policies [Line Items]
Regulatory asset, amortization period	21 months	21 months
Storm Restoration Costs
Summary of Significant Accounting Policies [Line Items]
Regulatory asset, amortization period	12 months	12 months