Employee Retirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Pension Benefits [Member]
Net periodic benefit (income) cost [Abstract]
Service cost	$ 17	$ 18	$ 34	$ 36
Interest cost	34	33	68	66
Expected return on plan assets	(104)	(102)	(207)	(204)
Special termination benefits	0	0	0	28
Net periodic cost (income) cost	(53)	(51)	(105)	(74)
Postretirement Benefits [Member]
Net periodic benefit (income) cost [Abstract]
Service cost	1	1	1	1
Interest cost	2	2	4	4
Expected return on plan assets	0	0	0	0
Special termination benefits	0	0	0	0
Net periodic cost (income) cost	3	3	5	5
Florida Power & Light Company | Pension Benefits [Member]
Net periodic benefit (income) cost [Abstract]
Net periodic cost (income) cost	(30)	(31)	(60)	(40)
Florida Power & Light Company | Postretirement Benefits [Member]
Net periodic benefit (income) cost [Abstract]
Net periodic cost (income) cost	$ 2	$ 2	$ 4	$ 4