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Summary of Significant Accounting and Reporting Policies - Property, Plant and Equiptment (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2025
Jun. 30, 2024
Jun. 30, 2025
Jun. 30, 2024
Dec. 31, 2024
Property, Plant and Equipment [Line Items]          
Electric plant in service and other property $ 159,996   $ 159,996   $ 151,677
Nuclear fuel 1,786   1,786   1,676
Construction work in progress 22,062   22,062   21,658
Property, plant and equipment, gross 183,844   183,844   175,011
Accumulated depreciation and amortization (38,102)   (38,102)   (36,159)
Property, plant and equipment – net 145,742   145,742   138,852
Allowance for Funds Used During Construction, Equity 44 $ 41 82 $ 97  
Florida Power & Light Company          
Property, Plant and Equipment [Line Items]          
Electric plant in service and other property 91,213   91,213   87,596
Nuclear fuel 1,120   1,120   1,140
Construction work in progress 6,994   6,994   7,214
Property, plant and equipment, gross 99,327   99,327   95,950
Accumulated depreciation and amortization (20,442)   (20,442)   (19,784)
Electric utility plant and other property – net 78,885   78,885   $ 76,166
Allowance for Funds Used During Construction 52 45 100 111  
Allowance for Funds Used During Construction, Equity 40 37 77 90  
NextEra Energy Resources          
Property, Plant and Equipment [Line Items]          
Project Development Costs $ 159 $ 112 $ 298 $ 210