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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2025
Sep. 30, 2024
Sep. 30, 2025
Sep. 30, 2024
Dec. 31, 2024
Disaggregation of Revenue [Line Items]          
Revenue $ 3,351 $ 3,289 $ 9,132 $ 9,316  
Loans Receivable, Fair Value Disclosure 781   781   $ 0
Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 3,405 3,330 9,304 9,432  
Warrior Run          
Disaggregation of Revenue [Line Items]          
Asset derecognized due to sale of assets 267   267    
Mong Duong Subsidiary [Member]          
Disaggregation of Revenue [Line Items]          
Financing Receivable, Accrued Interest, after Allowance for Credit Loss 781   781    
Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 1,075 929 2,978 2,641  
Other non-606 revenue 7 8 22 21  
Revenue 1,082 937 3,000 2,662  
Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 2,036 2,081 5,677 5,917  
Other non-606 revenue 233 271 455 737  
Revenue 2,269 2,352 6,132 6,654  
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue (54) (41) (172) (116)  
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 (54) (41) (172) (116)  
Other non-606 revenue 0 0 0 0  
Revenue (54) (41) (172) (116)  
Renewables | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 817 754 2,127 2,016  
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 756 676 2,014 1,839  
Other non-606 revenue 61 78 113 177  
Revenue 817 754 2,127 2,016  
Utilities | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 1,105 961 3,068 2,730  
Utilities | Regulated Revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 1,075 929 2,978 2,641  
Other non-606 revenue 7 8 22 21  
Revenue 1,082 937 3,000 2,662  
Utilities | Non-regulated revenue [Member] | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue from Contract with Customer, Including Assessed Tax 22 23 65 65  
Other non-606 revenue 1 1 3 3  
Revenue 23 24 68 68  
Energy Infrastructure | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 1,483 1,614 4,109 4,685  
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 1,312 1,422 3,770 4,128  
Other non-606 revenue 171 192 339 557  
Revenue 1,483 1,614 4,109 4,685  
New Energy Technologies | Operating Segments [Member]          
Disaggregation of Revenue [Line Items]          
Revenue 0 1 0 1  
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 1 0 1  
Other non-606 revenue 0 0 0 0  
Revenue $ 0 $ 1 $ 0 $ 1