Derivative Instruments (Reconciliation of Changes in the Fair Value) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	$ 813	$ 691	$ 813	$ 691
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	626	755	951	(854)
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	335	87	552	2,114
Included in regulatory assets and liabilities	(6)	(2)	51	5
Purchases	69	27	105	356
Settlements	(212)	(320)	(812)	(1,045)
Issuances	(55)	(18)	(94)	(119)
Transfers out	43	223	42	280
Gains (losses) included in operating revenues attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date	265	85	243	994
Transfers in	13	(61)	18	(46)
Florida Power & Light Company
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	33	7	33	7
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	57	13	24	9
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	0	0	0	0
Included in regulatory assets and liabilities	(6)	(2)	51	5
Purchases	0	0	0	0
Settlements	(6)	(6)	(30)	(9)
Issuances	0	0	0	0
Transfers out	0	2	0	2
Gains (losses) 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	(12)	$ 0	(12)	$ 0
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 817		$ 817