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Investments in Partnerships and Joint Ventures (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Equity method investment, financial statement, reported amounts [Abstract]      
Ownership interest in partnerships and joint ventures $ 5,728 $ 7,453  
NextEra Energy Resources' ownership interest, low range (in hundredths) 31.00%    
NextEra Energy Resources' ownership interest, high range (in hundredths) 57.00%    
Equity method investment, summarized financial information [Abstract]      
Net Income (Loss) Attributable to Noncontrolling Interest $ (550) (381) $ (862)
Total assets 127,684 117,691 103,702
Total liabilities 82,755 75,844  
Investment in equity method investees 5,728 7,453 6,748
Interest and Fee Income, Other Loans 120 101 $ 94
Due from Related Parties, Current 68 53  
Due from Related Parties, Noncurrent 32 33  
Guarantor Obligations, Current Carrying Value 288    
Equity Method Investment, Nonconsolidated Investee, Other      
Equity method investment, summarized financial information [Abstract]      
Net Income (Loss) Attributable to Noncontrolling Interest 516 128  
Total assets 22,717 20,659  
Total liabilities 6,612 6,956  
Partners'/members' equity(a) 16,105 13,703  
NEER [Member]      
Equity method investment, summarized financial information [Abstract]      
NEE's share of underlying equity in the principal entities 3,927 3,723  
Difference between investment carrying amount and underlying equity in net assets 1,312 3,153  
Investment in equity method investees $ 5,239 6,876  
Difference related to goodwill 70.00%    
FPL[Member]      
Equity method investment, summarized financial information [Abstract]      
Total assets $ 61,610 57,188  
Total liabilities $ 37,870 $ 35,790  
Electric Generating Assets To Gross Investment In Electric Utility Plant In Service 47.00% 46.00%  
General Facilities Assets To Gross Investment In Electric Utility Plant In Service 6.00% 7.00%  
Electric Distribution Assets To Gross Investment In Electric Utility Plant In Service 35.00% 35.00%  
NEP OpCo [Member]      
Equity method investment, summarized financial information [Abstract]      
Difference between investment carrying amount and underlying equity in net assets $ 2,800 $ 2,800  
NEP [Member]      
Equity method investment, summarized financial information [Abstract]      
Due to Related Parties 10 12  
Guarantor Obligations, Current Carrying Value 640    
Guarantees, Fair Value Disclosure 31    
NEP [Member]      
Equity method investment, summarized financial information [Abstract]      
Investment in equity method investees   $ 4,400  
Mountain Valley Pipeline [Member]      
Equity method investment, summarized financial information [Abstract]      
Equity Method Investment , Amortization Period Related To Goodwill $ 1,500    
Minimum [Member] | NEER [Member]      
Equity method investment, summarized financial information [Abstract]      
Amortization period 20 years    
Maximum [Member] | NEER [Member]      
Equity method investment, summarized financial information [Abstract]      
Amortization period 28 years