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Acquisitions (Details)
$ in Millions
1 Months Ended
Mar. 31, 2021
USD ($)
state
utlity
mi
Jun. 30, 2022
USD ($)
Dec. 31, 2021
USD ($)
Jan. 01, 2021
USD ($)
Business Acquisition [Line Items]        
Goodwill   $ 4,843 $ 4,844  
Florida Power & Light Company        
Business Acquisition [Line Items]        
Goodwill   2,989 $ 2,989  
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