Derivative Instruments (Reconciliation of Changes in the Fair Value) (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	$ 626	$ 755	$ 626	$ 755
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	667	456	951	(854)
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	183	820	217	2,028
Included in regulatory assets and liabilities	73	25	57	8
Purchases	14	111	36	329
Settlements	(299)	(416)	(601)	(725)
Issuances	(11)	(28)	(39)	(102)
Transfers out	(1)	(219)	0	55
Gains (losses) included in operating revenues attributable to the change in unrealized gains (losses) relating to derivatives held at the reporting date	151	738	(4)	1,375
Transfers in	0	6	5	16
Florida Power & Light Company
Realized and unrealized gains (losses): [Abstract]
Fair value based on significant unobservable inputs, ending balance	57	13	57	13
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	2	(11)	24	9
Realized and unrealized gains (losses): [Abstract]
Included in operating revenues	0	0	0	0
Included in regulatory assets and liabilities	73	25	57	8
Purchases	0	0	0	0
Settlements	(18)	(1)	(24)	(4)
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	$ 954		$ 954