Nature of Business and Basis of Presentation - General (Details) customer in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($) customer GW	Mar. 31, 2023 USD ($)
Business Acquisition [Line Items]
Generation capacity (in GW) | GW	13
Proceeds from credit facilities	$ 525	$ 1,050
Repayments of credit facilities	$ 525	825
Error Correction, Other
Business Acquisition [Line Items]
Proceeds from credit facilities		1,100
Repayments of credit facilities		$ 825
Residential Customers
Business Acquisition [Line Items]
Customers | customer	8.0