Risk Management, Derivative Instruments and Hedging Activities - Schedule of Net Notional Volumes of Open Commodity Derivatives and Interest Rate Derivatives (Details) $ in Millions	12 Months Ended
	Dec. 31, 2024 USD ($) MMBTU MWh T	Dec. 31, 2023 USD ($) MWh MMBTU T
Commodity derivatives | Short
Derivative [Line Items]
Commodity purchase (sales) derivatives, power and natural gas | MWh	(38,615,192)	(27,557,871)
Commodity derivatives | Long
Derivative [Line Items]
Commodity purchase (sales) derivatives, power and natural gas | MMBTU	(32,405,460)	(8,314,060)
Commodity purchase (sales) derivatives, emission allowances | T	100,000	500,000
Interest rate derivatives
Derivative [Line Items]
Interest rate (in millions) | $	$ 290	$ 290