Derivative Instruments (Income Statement Disclosure) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
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	$ (18)	$ (137)	$ (6)	$ (105)
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	833	(70)	543	(695)
Not Designated as Hedging Instrument \| Commodity contracts \| Income Statement Location [Axis]: us-gaap:RegulatedAndUnregulatedOperatingRevenue
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	340	(64)	279	91
Unrealized Gain (Loss) on Derivatives	214	(76)	284	(64)
Not Designated as Hedging Instrument \| Foreign Exchange Contract \| Income Statement Location [Axis]: nee:InterestExpenseAggregateExpenses
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	69	21	(181)	16
Unrealized Gain (Loss) on Derivatives	98	27	(134)	24
Not Designated as Hedging Instrument \| Interest rate contracts \| Income Statement Location [Axis]: nee:InterestExpenseAggregateExpenses
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net	424	(26)	445	(802)
Unrealized Gain (Loss) on Derivatives	375	10	522	(963)
Reclassification out of Accumulated Other Comprehensive Income \| Not Designated as Hedging Instrument \| Foreign Exchange Contract \| Income Statement Location [Axis]: nee:InterestExpenseAggregateExpenses
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Interest Expense	(1)	(1)	(1)	(1)
Reclassification out of Accumulated Other Comprehensive Income \| Not Designated as Hedging Instrument \| Interest rate contracts \| Income Statement Location [Axis]: nee:InterestExpenseAggregateExpenses
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net [Abstract]
Interest Expense	$ 1	$ 0	$ 1	$ 1