Derivative Instruments - Narrative (Details) - USD ($)	Sep. 30, 2024	Dec. 31, 2023
Derivative [Line Items]
Margin cash collateral received from counterparties that was not offset against derivative assets	$ 17,000,000	$ 78,000,000
Margin cash collateral provided to counterparties that was not offset against derivative assets or liabilities	125,000,000	73,000,000
Florida Power & Light Company
Derivative [Line Items]
Margin cash collateral received from counterparties that was not offset against derivative assets	0	3,000,000
Margin cash collateral provided to counterparties that was not offset against derivative assets or liabilities	$ 0	$ 0