Employee Retirement Benefits (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Pension Benefits [Member]
Net periodic benefit (income) cost [Abstract]
Service cost	$ 19	$ 17	$ 38	$ 34
Interest cost	32	34	64	68
Expected return on plan assets	(105)	(104)	(211)	(207)
Special termination benefits	75	0	75	0
Net periodic cost (income) cost	21	(53)	(34)	(105)
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	(3)	(30)	(33)	(60)
Florida Power & Light Company \| Postretirement Benefits [Member]
Net periodic benefit (income) cost [Abstract]
Net periodic cost (income) cost	$ 1	$ 2	$ 3	$ 4

Amount of expected return (loss) recognized in net periodic benefit (cost) credit, calculated based on expected long-term rate of return and market-related value of plan assets of defined benefit plan.

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Amount of cost recognized for passage of time related to defined benefit plan.

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Amount of net periodic benefit cost (credit) for defined benefit plan.

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Amount of cost for actuarial present value of benefits attributed to service rendered by employee for defined benefit plan.

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Amount of increase in benefit obligation for benefits provided to employees payable from defined benefit plan or payable upon retirement.

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