Derivative Instruments (Reconciliation of Changes in the Fair Value) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	$ 557	$ 626	$ 557	$ 626
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	517	667	387	951
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	257	183	366	217
Included in regulatory assets and liabilities	(114)	73	(85)	57
Purchases	34	14	72	36
Settlements	(119)	(299)	(130)	(601)
Issuances	(20)	(11)	(36)	(39)
Transfers out	1	(1)	(1)	0
Gains (losses) included in operating revenues attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date	183	151	309	(4)
Transfers in	1	0	(16)	5
Florida Power & Light Company
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	(36)	57	(36)	57
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	58	2	34	24
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	0	0	0	0
Included in regulatory assets and liabilities	(114)	73	(85)	57
Purchases	0	0	0	0
Settlements	20	(18)	15	(24)
Issuances	0	0	0	0
Transfers out	0	0	0	0
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	0	$ 0	0	$ 0
Level 3
Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]
Financial and Nonfinancial Liabilities, Fair Value Disclosure	$ 1,086		$ 1,086