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Commitments and Contingencies (Required Capacity and/or Minimum Payments Under Contracts) (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
NEER Segment      
Long-term Purchase Commitment [Line Items]      
Capacity payments and/or minimum payments - 2024 $ 4,825    
Capacity payments and/or minimum payments - 2025 565    
Capacity payments and/or minimum payments - 2026 255    
Capacity payments and/or minimum payments - 2027 240    
Capacity payments and/or minimum payments - 2028 115    
Capacity payments and/or minimum payments - Thereafter 1,970    
Commitment to invest 230    
Joint Obligations First Year 1,065    
Joint Obligations Second Year 40    
Joint Obligations Third Year $ 5    
Mountain Valley Pipeline [Member] | NEER Segment      
Long-term Purchase Commitment [Line Items]      
Natural gas transportation agreement, term 20 years    
Amounts Excluded from Required Capacity and or Minimum Payments, Annual Commitment $ 70    
Contract Group 1 [Member] | NEER Segment      
Long-term Purchase Commitment [Line Items]      
Commitment amount included in capital expenditures 4,400    
FPL [Member]      
Long-term Purchase Commitment [Line Items]      
Capacity payments and/or minimum payments - 2024 1,100    
Capacity payments and/or minimum payments - 2025 1,110    
Capacity payments and/or minimum payments - 2026 1,110    
Capacity payments and/or minimum payments - 2027 1,005    
Capacity payments and/or minimum payments - 2028 955    
Capacity payments and/or minimum payments - Thereafter 7,830    
Related Party Transaction, Amounts of Transaction 417 $ 418 $ 419
FPL [Member] | Natural Gas Including Transportation and Storage Contract Minimum Payments [Member] | Sabal Trail and Florida Southeast Connection [Member]      
Long-term Purchase Commitment [Line Items]      
Capacity payments and/or minimum payments - 2024 410    
Capacity payments and/or minimum payments - 2025 405    
Capacity payments and/or minimum payments - 2026 400    
Capacity payments and/or minimum payments - 2027 400    
Capacity payments and/or minimum payments - 2028 400    
Capacity payments and/or minimum payments - Thereafter $ 5,160    
Join Venture [Member] | NEER Segment      
Long-term Purchase Commitment [Line Items]      
Ownership interest 32.80%    
Consolidation, Eliminations [Member] | FPL [Member]      
Long-term Purchase Commitment [Line Items]      
Related Party Transaction, Amounts of Transaction $ 99 $ 102 $ 105