Derivative Instruments (Reconciliation of Changes in the Fair Value) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	$ 905	$ 813	$ 905	$ 813
Derivative Financial Instruments, Net [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value based on significant unobservable inputs, beginning balance	557	626	387	951
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	379	335	745	552
Included in regulatory assets and liabilities	25	(6)	(61)	51
Purchases	66	69	137	105
Settlements	(103)	(212)	(231)	(812)
Issuances	(19)	(55)	(55)	(94)
Transfers out	0	43	(1)	42
Gains included in operating revenues attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date	364	265	581	243
Transfers in	0	13	(16)	18
Florida Power & Light Company
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	7	33	7	33
Florida Power & Light Company | Derivative Financial Instruments, Net [Member]
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value based on significant unobservable inputs, beginning balance	(36)	57	34	24
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	0	0	0	0
Included in regulatory assets and liabilities	25	(6)	(61)	51
Purchases	0	0	0	0
Settlements	18	(6)	34	(30)
Issuances	0	0	0	0
Transfers out	0	0	0	0
Gains included in operating revenues attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date	0	0	0	0
Transfers in	0	$ (12)	0	$ (12)
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 986		$ 986