v3.25.4
Summary of Significant Accounting and Reporting Policies - Decommissioning of Nuclear Plants, Dismantlement of Plants and Other Accrued Asset Removal Costs (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2025
USD ($)
unit
Dec. 31, 2024
USD ($)
Dec. 31, 2023
USD ($)
Summary of Significant Accounting Policies [Line Items]      
Plant Dismantlement Approved Expense $ 106    
Asset Retirement Obligation $ 3,685 $ 3,698 $ 3,437
St. Lucie Units Number One      
Summary of Significant Accounting Policies [Line Items]      
License renewal period 20 years    
St. Lucie Units Number Two      
Summary of Significant Accounting Policies [Line Items]      
License renewal period 20 years    
FPL      
Summary of Significant Accounting Policies [Line Items]      
Maximum Interval Between Nuclear Decommissioning Studies 5 years    
Number Of Nuclear Units Of Wholly Owned Subsidiary | unit 4    
Ultimate Costs Of Nuclear Decommissioning For Wholly Owned Subsidiary $ 10,200    
FPL's Ultimate costs of nuclear decommissioning, in current year dollars 2,700    
Fund Earnings On Decommissioning Funds Of Wholly Owned Subsidiary 224 238 144
Plant Dismantlement Approved Expense 48    
Ultimate Costs Of Plant Dismantlement 2,100    
Ultimate Costs Of Plant Dismantlement In Current Year Dollars 1,200    
Asset Retirement Obligation 2,170 2,295 $ 2,170
NEER      
Summary of Significant Accounting Policies [Line Items]      
Asset Retirement Obligation 1,500 $ 1,400  
Ultimate Costs Of Nuclear Decommissioning For Wholly Owned Indirect Subsidiary 11,400    
Ultimate Costs Of Nuclear Decommissioning In Current Year Dollars For Wholly Owned Indirect Subsidiary 2,300    
Ultimate costs to dismantle wind and solar facilities $ 4,500    
Effective Period For Decommissioning Funding Plan For Subsidiary 4 years