Derivative Instruments (Income Statement Disclosure) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
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	$ 25	$ (6)	$ (79)	$ 46
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	202	(240)	(492)	153
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]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	347	636	438	434
Unrealized Gain (Loss) on Derivatives	352	577	288	342
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]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(56)	24	(40)	(6)
Unrealized Gain (Loss) on Derivatives	(54)	25	(30)	3
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]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	(88)	(899)	(889)	(274)
Unrealized Gain (Loss) on Derivatives	(94)	(944)	(1,057)	(859)
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	$ 1	$ 1