Derivative Instruments - Narrative (Details) - USD ($)	3 Months Ended
	Mar. 31, 2022	Dec. 31, 2021
Derivative [Line Items]
Total loss to be reclassified during next 12 months	$ 3,000,000
Margin cash collateral received from counterparties that was not offset against derivative assets	47,000,000	$ 56,000,000
Margin cash collateral provided to counterparties that was not offset against derivative assets or liabilities	633,000,000	673,000,000
Florida Power & Light Company
Derivative [Line Items]
Margin cash collateral received from counterparties that was not offset against derivative assets	0	0
Margin cash collateral provided to counterparties that was not offset against derivative assets or liabilities	$ 0	$ 0