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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, 2022
Sep. 30, 2021
Sep. 30, 2022
Sep. 30, 2021
Dec. 31, 2021
Property, Plant and Equipment [Line Items]          
Electric plant in service and other property $ 121,700   $ 121,700   $ 112,500
Nuclear fuel 1,569   1,569   1,606
Construction work in progress 15,961   15,961   14,141
Property, plant and equipment, gross 139,230   139,230   128,247
Accumulated depreciation and amortization (30,783)   (30,783)   (28,899)
Property, plant and equipment – net 108,447   108,447   99,348
Allowance for Funds Used During Construction, Equity 20 $ 37 88 $ 100  
Florida Power & Light Company          
Property, Plant and Equipment [Line Items]          
Electric plant in service and other property 72,811   72,811   67,771
Nuclear fuel 1,118   1,118   1,170
Construction work in progress 6,055   6,055   6,326
Property, plant and equipment, gross 79,984   79,984   75,267
Accumulated depreciation and amortization (17,772)   (17,772)   (17,040)
Electric utility plant and other property – net 62,212   62,212   $ 58,227
Allowance for Funds Used During Construction 25 46 106 124  
Allowance for Funds Used During Construction, Equity 19 35 82 93  
NextEra Energy Resources          
Property, Plant and Equipment [Line Items]          
Project Development Costs $ 46 $ 42 $ 119 $ 104