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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

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