v3.26.1
Segments - Long Lived Assets (Details) - USD ($)
$ in Millions
Mar. 31, 2026
Dec. 31, 2025
Mar. 31, 2025
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount $ 39,702 $ 38,187  
Assets, Current 6,110 6,502  
Investments in and advances to affiliates 1,006 1,004  
Debt service reserves and other deposits 120 89  
Goodwill 342 342  
Other intangible assets, net of accumulated amortization of $503 and $479, respectively 2,019 2,040  
Deferred Income Tax Assets, Net 425 397  
Loans Receivable, Fair Value Disclosure 730   $ 755
Other noncurrent assets, excluding ROU assets for operating leases 2,365 2,452  
Assets 52,819 51,768  
Operating Segments [Member] | Renewables      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount 25,353 23,945  
Operating Segments [Member] | Utilities      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount 9,652 9,464  
Operating Segments [Member] | Energy Infrastructure      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount 4,638 4,726  
Operating Segments [Member] | New Energy Technologies      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount 25 23  
Operating Segments [Member] | Corporate Other And Other Eliminations [Member]      
Segment Reporting, Entity-Wide Information Not Provided as Part of Reportable Segment, Geographical Area, Revenue and Long-Lived Asset [Line Items]      
Long-Lived Asset, Excluding Financial Instrument, Customer Relationship, Mortgage Servicing Right, Deferred Policy Acquisition Cost, and Deferred Tax Asset, Amount $ 34 $ 29