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Acquisitions (Details)
$ in Millions
1 Months Ended
Oct. 27, 2022
USD ($)
numberOfProjects
Mar. 31, 2021
USD ($)
utlity
state
mi
Sep. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jan. 01, 2021
USD ($)
Business Acquisition [Line Items]          
Goodwill     $ 4,872 $ 4,844  
Florida Power & Light Company          
Business Acquisition [Line Items]          
Goodwill     2,989 $ 2,989  
NextEra Energy Resources          
Business Acquisition [Line Items]          
Contingent consideration liabilities     198    
Gulf Power          
Business Acquisition [Line Items]          
Assets assumed         $ 6,700
Property, plant and equipment         4,900
Regulatory assets         1,200
Assumed liabilities         3,900
Business combination, recognized identifiable assets acquired and liabilities assumed, noncurrent liabilities, long-term debt         1,800
Deferred income taxes         729
Regulatory liabilities         566
Gulf Power | Florida Power & Light Company          
Business Acquisition [Line Items]          
Goodwill         $ 2,700
GridLiance [Member] | NextEra Energy Transmission, LLC Subsidiary [Member]          
Business Acquisition [Line Items]          
Assets assumed   $ 384      
Assumed liabilities   $ 210      
Goodwill     592    
Number of FERC-r transmission utilities | utlity   3      
Number of miles of power lines | mi   700      
Number of states in which entity operates | state   6      
Consideration transferred   $ 502      
Debt assumed   175      
Contingent consideration liabilities   $ 264      
Goodwill, Expected Tax Deductible Amount     $ 586    
GridLiance [Member] | NextEra Energy Transmission, LLC Subsidiary [Member] | Midwest And Nevada          
Business Acquisition [Line Items]          
Number of states in which entity operates | state   5      
RNG Acquisition | NextEra Energy Resources | Forecast          
Business Acquisition [Line Items]          
Consideration transferred $ 1,100        
Debt assumed $ 37        
Business Acquisition, Percentage of Voting Interests Acquired 100.00%        
Number of RNG projects | numberOfProjects 31        
Number of RNG projects, renewable gas facility | numberOfProjects 1