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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2022
Dec. 31, 2021
Dec. 31, 2020
Property, Plant and Equipment [Line Items]      
Property, plant and equipment – net $ 111,059 $ 99,348 $ 91,803
FPL [Member]      
Property, Plant and Equipment [Line Items]      
Amount of reserve (reversal) amortization recognized 114 429 (1)
AFUDC capitalized $ 136 $ 176 $ 117
FPL [Member]      
Property, Plant and Equipment [Line Items]      
Percentage of electric generating assets to gross investment in electric utility plant in service (in hundredths) 44.00% 46.00%  
Percentage of electric transmission assets to gross investment in electric utility plant in service (in hundredths) 14.00% 13.00%  
Percentage of electric distribution assets to gross investment in electric utility plant in service (in hundredths) 35.00% 35.00%  
Percentage of general facilities assets to gross investment in electric utility plant in service (in hundredths) 7.00% 6.00%  
FPL's composite depreciation rate for electric plant in service (in hundredths) 3.60% 3.80% 3.80%
AFUDC equity component $ 105 $ 132 $ 87
FPL [Member] | St. Lucie Unit No. 2      
Property, Plant and Equipment [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 85.00%    
Gross Investment $ 2,276    
Accumulated Depreciation 1,062    
Construction Work in Progress $ 163    
FPL [Member] | Daniel Units Nos. 1 and 2      
Property, Plant and Equipment [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 50.00%    
Gross Investment $ 753    
Accumulated Depreciation 285    
Construction Work in Progress $ 22    
FPL [Member] | Scherer Unit No. 3      
Property, Plant and Equipment [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 25.00%    
Gross Investment $ 405    
Accumulated Depreciation 169    
Construction Work in Progress 1    
NEER [Member]      
Property, Plant and Equipment [Line Items]      
Net Book Value Of Assets Serving As Collateral 14,400    
Interest capitalized on construction projects of NEER $ 172 $ 139 $ 168
NEER [Member] | Wind plants [Member]      
Property, Plant and Equipment [Line Items]      
Percentage of gross depreciable assets by plant type 51.00% 53.00%  
NEER [Member] | Wind plants [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 30 years    
NEER [Member] | Wind plants [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 35 years    
NEER [Member] | Solar plants [Member]      
Property, Plant and Equipment [Line Items]      
Percentage of gross depreciable assets by plant type 14.00% 14.00%  
NEER [Member] | Solar plants [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 30 years    
NEER [Member] | Solar plants [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 35 years    
NEER [Member] | Oil and Gas Properties [Member]      
Property, Plant and Equipment [Line Items]      
Percentage of gross depreciable assets by plant type 15.00% 14.00%  
NEER [Member] | Nuclear Plant [Member]      
Property, Plant and Equipment [Line Items]      
Percentage of gross depreciable assets by plant type 7.00% 8.00%  
NEER [Member] | Nuclear Plant [Member] | Minimum [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 23 years    
NEER [Member] | Nuclear Plant [Member] | Maximum [Member]      
Property, Plant and Equipment [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 47 years    
NEER [Member] | Seabrook      
Property, Plant and Equipment [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 88.23%    
Gross Investment $ 1,355    
Accumulated Depreciation 494    
Construction Work in Progress $ 74    
NEER [Member] | Wyman Station Unit No. 4      
Property, Plant and Equipment [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 91.19%    
Gross Investment $ 31    
Accumulated Depreciation 12    
Construction Work in Progress $ 0    
NEER [Member] | Stanton      
Property, Plant and Equipment [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 65.00%    
Gross Investment $ 139    
Accumulated Depreciation 25    
Construction Work in Progress $ 0    
NEER [Member] | Transmission substation assets located in Seabrook, New Hampshire      
Property, Plant and Equipment [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 88.23%    
Gross Investment $ 140    
Accumulated Depreciation 4    
Construction Work in Progress $ 4