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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Dec. 31, 2025
Disaggregation of Revenue [Line Items]          
Revenue $ 3,422 $ 2,855 $ 6,602 $ 5,781  
Loans Receivable, Fair Value Disclosure 710   710   $ 755
Financing Receivable, after Allowance for Credit Loss 807   807   855
Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 3,453 2,904 6,665 5,899  
Mong Duong Subsidiary [Member]          
Disaggregation of Revenue [Line Items]          
Financing Receivable, Accrued Interest, after Allowance for Credit Loss 710   710    
Financing Receivable, after Allowance for Credit Loss 806   806    
Discontinued Operations, Held-for-sale or Disposed of by Sale [Member] | Mong Duong Subsidiary [Member]          
Disaggregation of Revenue [Line Items]          
Financing Receivable, after Allowance for Credit Loss, Current         107
Financing Receivable, after Allowance for Credit Loss         862
Financing Receivable, after Allowance for Credit Loss, Noncurrent         $ 755
Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 987 927 2,092 1,903  
Other non-606 revenue 8 6 17 15  
Revenue 995 933 2,109 1,918  
Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 2,276 1,845 4,176 3,641  
Other non-606 revenue 151 77 317 222  
Revenue 2,427 1,922 4,493 3,863  
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue (31) (49) (63) (118)  
Corporate Other And Other Eliminations [Member] | Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 0 0 0 0  
Other non-606 revenue 0 0 0 0  
Revenue 0 0 0 0  
Corporate Other And Other Eliminations [Member] | Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax (31) (49) (63) (118)  
Other non-606 revenue 0 0 0 0  
Revenue (31) (49) (63) (118)  
Renewables | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 939 644 1,759 1,310  
Renewables | Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 0 0 0 0  
Other non-606 revenue 0 0 0 0  
Revenue 0 0 0 0  
Renewables | Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 849 638 1,603 1,258  
Other non-606 revenue 90 6 156 52  
Revenue 939 644 1,759 1,310  
Utilities | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 1,018 954 2,154 1,963  
Utilities | Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 987 927 2,092 1,903  
Other non-606 revenue 8 6 17 15  
Revenue 995 933 2,109 1,918  
Utilities | Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 23 20 44 43  
Other non-606 revenue 0 1 1 2  
Revenue 23 21 45 45  
Energy Infrastructure | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 1,496 1,306 2,752 2,626  
Energy Infrastructure | Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 0 0 0 0  
Other non-606 revenue 0 0 0 0  
Revenue 0 0 0 0  
Energy Infrastructure | Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 1,435 1,236 2,592 2,458  
Other non-606 revenue 61 70 160 168  
Revenue 1,496 1,306 2,752 2,626  
New Energy Technologies | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 0 0 0 0  
New Energy Technologies | Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 0 0 0 0  
Other non-606 revenue 0 0 0 0  
Revenue 0 0 0 0  
New Energy Technologies | Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 0 0 0 0  
Other non-606 revenue 0 0 0 0  
Revenue $ 0 $ 0 $ 0 $ 0