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Summary of Significant Accounting and Reporting Policies - Property, Plant and Equiptment (Details) - USD ($)
$ in Millions
3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Property, Plant and Equipment [Line Items]          
Electric plant in service and other property $ 163,791   $ 163,791   $ 151,677
Nuclear fuel 1,822   1,822   1,676
Construction work in progress 23,320   23,320   21,658
Property, plant and equipment, gross 188,933   188,933   175,011
Accumulated depreciation and amortization (38,890)   (38,890)   (36,159)
Property, plant and equipment – net 150,043   150,043   138,852
Allowance for Funds Used During Construction, Equity 48 $ 50 130 $ 147  
Florida Power & Light Company          
Property, Plant and Equipment [Line Items]          
Electric plant in service and other property 92,507   92,507   87,596
Nuclear fuel 1,149   1,149   1,140
Construction work in progress 7,795   7,795   7,214
Property, plant and equipment, gross 101,451   101,451   95,950
Accumulated depreciation and amortization (20,932)   (20,932)   (19,784)
Electric utility plant and other property – net 80,519   80,519   $ 76,166
Allowance for Funds Used During Construction 60 69 159 180  
Allowance for Funds Used During Construction, Equity 46 49 123 139  
NextEra Energy Resources          
Property, Plant and Equipment [Line Items]          
Project Development Costs $ 179 $ 134 $ 477 $ 344