Derivative Instruments - Narrative (Details) - USD ($)	Sep. 30, 2025	Dec. 31, 2024
Derivative [Line Items]
Margin cash collateral received from counterparties that was not offset against derivative assets	$ 38,000,000	$ 47,000,000
Margin cash collateral provided to counterparties that was not offset against derivative assets or liabilities	98,000,000	58,000,000
Florida Power & Light Company
Derivative [Line Items]
Margin cash collateral received from counterparties that was not offset against derivative assets	2,000,000	2,000,000
Margin cash collateral provided to counterparties that was not offset against derivative assets or liabilities	$ 0	$ 0