Employee Retirement Benefits - Plan Assets, Benefit Obligations and Funded Status (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Postretirement Benefits Plan [Member]
Change in pension benefit obligation:
Service cost	$ 1	$ 1	$ 1
Interest cost	8	9	9
Special termination benefits	0	0	0
Funded status:
Prepaid (accrued) benefit cost	(204)	(212)
Pension Benefits [Member]
Change in pension plan assets:
Plan assets, beginning balance	5,121	4,897
Actual return on plan assets	659	469
Benefit payments	(216)	(245)
Plan assets, ending balance	5,564	5,121	4,897
Change in pension benefit obligation:
Obligation, beginning balance	2,625	2,785
Service cost	69	71	64
Interest cost	136	131	132
Special termination benefits	0	27	0
Plan amendments	4	(3)
Actuarial losses (gains) – net(b)	79	(141)
Benefit payments	(216)	(245)
Obligation, ending balance	2,697	2,625	$ 2,785
Funded status:
Prepaid (accrued) benefit cost	2,868	2,496
Accumulated benefit obligation	2,616	2,553
FPL | Other Postretirement Benefits Plan [Member]
Funded status:
Prepaid (accrued) benefit cost	(78)	(86)
FPL | Pension Benefits [Member]
Funded status:
Prepaid (accrued) benefit cost	$ 2,072	$ 1,954