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Revenue (Details) - USD ($)
$ in Millions
 3 Months Ended
Mar. 31, 2025
Mar. 31, 2024
Disaggregation of Revenue [Line Items]    
Revenue $ 2,926 $ 3,085
Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue 2,995 3,125
Warrior Run    
Disaggregation of Revenue [Line Items]    
Asset derecognized due to sale of assets 267  
Regulated Revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 976 847
Other non-606 revenue 9 6
Revenue 985 853
Non-regulated revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 1,796 1,975
Other non-606 revenue 145 257
Revenue 1,941 2,232
Corporate Other And Other Eliminations [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue (69) (40)
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
Other non-606 revenue 0 0
Revenue 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 (69) (40)
Other non-606 revenue 0 0
Revenue (69) (40)
Renewables | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue 666 643
Renewables | Regulated Revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 0 0
Other non-606 revenue 0 0
Revenue 0 0
Renewables | Non-regulated revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 620 594
Other non-606 revenue 46 49
Revenue 666 643
Utilities | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue 1,009 873
Utilities | Regulated Revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 976 847
Other non-606 revenue 9 6
Revenue 985 853
Utilities | Non-regulated revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 23 19
Other non-606 revenue 1 1
Revenue 24 20
Energy Infrastructure | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue 1,320 1,609
Energy Infrastructure | Regulated Revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 0 0
Other non-606 revenue 0 0
Revenue 0 0
Energy Infrastructure | Non-regulated revenue [Member] | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue from Contract with Customer, Including Assessed Tax 1,222 1,402
Other non-606 revenue 98 207
Revenue 1,320 1,609
New Energy Technologies | Operating Segments [Member]    
Disaggregation of Revenue [Line Items]    
Revenue 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
Other non-606 revenue 0 0
Revenue 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
Other non-606 revenue 0 0
Revenue $ 0 $ 0