Derivative Instruments (Details) - USD ($)	Dec. 31, 2023	Dec. 31, 2022
Derivative [Line Items]
Derivative, Collateral, Obligation to Return Cash	$ 78,000,000	$ 106,000,000
Margin Cash Collateral Not Netted Against Derivative Liabilities	73,000,000	268,000,000
FPL [Member]
Derivative [Line Items]
Derivative, Collateral, Obligation to Return Cash	3,000,000	0
Margin Cash Collateral Not Netted Against Derivative Liabilities	$ 0	$ 0