Nature of Business and Basis of Presentation - General (Details) customer in Millions, $ in Millions	6 Months Ended
	Jun. 30, 2024 USD ($) customer GW	Jun. 30, 2023 USD ($)
Business Acquisition [Line Items]
Generation capacity (in GW) | GW	13
Proceeds from credit facilities	$ 625	$ 1,870
Repayments of credit facilities	$ 625	1,670
Error Correction, Other
Business Acquisition [Line Items]
Proceeds from credit facilities		1,900
Repayments of credit facilities		$ 1,700
Residential Customers
Business Acquisition [Line Items]
Customers | customer	8.0