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Summary of Significant Accounting and Reporting Policies - Property, Plant and Equiptment (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2023
Mar. 31, 2022
Dec. 31, 2022
Property, Plant and Equipment [Line Items]      
Electric plant in service and other property $ 128,927   $ 124,963
Nuclear fuel 1,732   1,684
Construction work in progress 16,264   15,675
Property, plant and equipment, gross 146,923   142,322
Accumulated depreciation and amortization (31,994)   (31,263)
Property, plant and equipment – net 114,929   111,059
Allowance for Funds Used During Construction, Equity 31 $ 37  
Florida Power & Light Company      
Property, Plant and Equipment [Line Items]      
Electric plant in service and other property 76,103   74,353
Nuclear fuel 1,223   1,190
Construction work in progress 6,352   7,026
Property, plant and equipment, gross 83,678   82,569
Accumulated depreciation and amortization (18,032)   (17,876)
Electric utility plant and other property – net 65,646   $ 64,693
Allowance for Funds Used During Construction 39 44  
Allowance for Funds Used During Construction, Equity 30 34  
NextEra Energy Resources      
Property, Plant and Equipment [Line Items]      
Project Development Costs $ 58 $ 36