v3.25.4
Summary of Significant Accounting and Reporting Policies (Goodwill and Intangible Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Goodwill and Intangible Assets [Line Items]      
Goodwill $ 4,849 $ 4,866  
Other intangible assets not subject to amortization, primarily land easements 137 137  
Other intangible assets:      
Total 1,886 1,780  
Accumulated amortization (256) (202)  
Total other intangible assets subject to amortization - net 1,630 1,578  
Intangible assets, amortization [Abstract]      
Amortization expense 65 62 $ 58
Amortization Expense Year 1 60    
Amortization Expense Year 2 56    
Amortization Expense Year 3 54    
Amortization Expense Year 4 52    
Amortization Expense Year 5 $ 51    
Purchased Power Agreements [Member]      
Other intangible assets:      
Weighted average useful lives (years) 18 years    
Total $ 635 633  
Biogas Rights Agreements      
Other intangible assets:      
Weighted average useful lives (years) 28 years    
Total $ 952 933  
Other, primarily transportation contracts and customer lists [Member]      
Other intangible assets:      
Weighted average useful lives (years) 17 years    
Total $ 299 214  
Rate-Regulated Assets [Member]      
Goodwill and Intangible Assets [Line Items]      
Goodwill 1,154 1,167  
Clean Energy Assets [Member]      
Goodwill and Intangible Assets [Line Items]      
Goodwill 420 424  
Customer Supply [Member]      
Goodwill and Intangible Assets [Line Items]      
Goodwill 299 299  
Corporate and Other [Member]      
Goodwill and Intangible Assets [Line Items]      
Goodwill 11 11  
FPL      
Goodwill and Intangible Assets [Line Items]      
Goodwill $ 2,965 $ 2,965