Derivative Instruments (Income Statement Disclosure) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022
Florida Power & Light Company
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Gains (losses) on commodity contracts, recorded as regulatory assets and or liabilities on the balance sheet due to regulatory treatment	$ 2	$ 131	$ (7)	$ 110
Not Designated as Hedging Instrument
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	441	77	2,435	(2,295)
Not Designated as Hedging Instrument | Commodity contracts | Gains (losses) included in operating revenues [Member]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Unrealized Gain (Loss) on Derivatives	(362)	(10)	1,794	(2,942)
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(318)	(122)	1,595	(3,488)
Not Designated as Hedging Instrument | Foreign Exchange Contract | Gains (Losses) Included In Interest Expense Member
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Unrealized Gain (Loss) on Derivatives	(5)	(32)	66	(113)
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(6)	(36)	(73)	(121)
Not Designated as Hedging Instrument | Interest rate contracts | Gains (Losses) Included In Interest Expense Member
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Unrealized Gain (Loss) on Derivatives	658	16	634	1,131
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	766	236	915	1,321
Reclassification out of Accumulated Other Comprehensive Income | Not Designated as Hedging Instrument | Foreign Exchange Contract | Gains (Losses) Included In Interest Expense Member
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Interest Expense	(1)	(1)	(2)	(2)
Reclassification out of Accumulated Other Comprehensive Income | Not Designated as Hedging Instrument | Interest rate contracts | Gains (Losses) Included In Interest Expense Member
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Interest Expense	$ 0	$ 0	$ 0	$ (5)