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Property, Plant and Equipment (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Jointly Owned Utility Plant Interests [Line Items]      
Property, plant and equipment – net $ 99,348 $ 91,803 $ 82,010
FPL [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Amount of reserve (reversal) amortization recognized $ 429 $ (1) $ (357)
AFUDC capitalization rate (in hundredths) 6.22% 6.22% 6.22%
AFUDC capitalized $ 124 $ 79 $ 80
Gulf Power [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
AFUDC capitalization rate (in hundredths) 5.73% 5.73% 5.73%
AFUDC capitalized $ 53 $ 38 $ 6
FPL [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Percentage of electric generating assets to gross investment in electric utility plant in service (in hundredths) 46.00% 47.00%  
Percentage of electric transmission assets to gross investment in electric utility plant in service (in hundredths) 13.00% 12.00%  
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) 6.00% 6.00%  
FPL's composite depreciation rate for electric plant in service (in hundredths) 3.80% 3.80% 3.90%
FPL [Member] | St. Lucie Unit No. 2      
Jointly Owned Utility Plant Interests [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 85.00%    
Gross Investment $ 2,284    
Accumulated Depreciation 1,044    
Construction Work in Progress $ 90    
FPL [Member] | Daniel Units Nos. 1 and 2      
Jointly Owned Utility Plant Interests [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 50.00%    
Gross Investment $ 759    
Accumulated Depreciation 274    
Construction Work in Progress $ 16    
FPL [Member] | Scherer Unit No. 3      
Jointly Owned Utility Plant Interests [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 25.00%    
Gross Investment $ 449    
Accumulated Depreciation 204    
Construction Work in Progress 3    
NEER [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Net Book Value Of Assets Serving As Collateral 13,500    
Interest capitalized on construction projects of NextEra Energy Resources $ 139 $ 168 $ 135
NEER [Member] | Wind plants [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Percentage of gross depreciable assets by plant type 53.00% 55.00%  
NEER [Member] | Wind plants [Member] | Minimum [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 30 years    
NEER [Member] | Wind plants [Member] | Maximum [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 35 years    
NEER [Member] | Solar plants [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Percentage of gross depreciable assets by plant type 14.00% 13.00%  
NEER [Member] | Solar plants [Member] | Minimum [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 30 years    
NEER [Member] | Solar plants [Member] | Maximum [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 35 years    
NEER [Member] | Oil and Gas Properties [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Percentage of gross depreciable assets by plant type 14.00% 14.00%  
NEER [Member] | Nuclear Plant [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Percentage of gross depreciable assets by plant type 8.00% 8.00%  
NEER [Member] | Nuclear Plant [Member] | Minimum [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 23 years    
NEER [Member] | Nuclear Plant [Member] | Maximum [Member]      
Jointly Owned Utility Plant Interests [Line Items]      
Property, plant and equipment, estimated useful lives (in years) 47 years    
NEER [Member] | Seabrook      
Jointly Owned Utility Plant Interests [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 88.23%    
Gross Investment $ 1,330    
Accumulated Depreciation 453    
Construction Work in Progress $ 58    
NEER [Member] | Wyman Station Unit No. 4      
Jointly Owned Utility Plant Interests [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 91.19%    
Gross Investment $ 30    
Accumulated Depreciation 11    
Construction Work in Progress $ 0    
NEER [Member] | Stanton      
Jointly Owned Utility Plant Interests [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 65.00%    
Gross Investment $ 139    
Accumulated Depreciation 19    
Construction Work in Progress $ 0    
NEER [Member] | Transmission substation assets located in Seabrook, New Hampshire      
Jointly Owned Utility Plant Interests [Line Items]      
Jointly Owned Utility Plant, Proportionate Ownership Share 88.23%    
Gross Investment $ 114    
Accumulated Depreciation 8    
Construction Work in Progress $ 22