v3.26.3
Borrowings and Other Financing Instruments Equity through DRIP and Benefits Program (Details) - USD ($)
shares in Millions, $ in Millions
 9 Months Ended
Sep. 30, 2026
Sep. 30, 2025
Forward Contract Indexed to Issuer's Equity [Line Items]    
Proceeds from issuance of common stock $ 839 $ 1,151
Dividend Reinvestment Program    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Proceeds from issuance of common stock $ 83 $ 48
2025 Forward Equity Agreements    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Period End Net Share Settlement Price, Common Shares (in shares) 0.2  
Net Cash (millions of dollars) $ 17  
Physical Share Delivery Proceeds (millions of dollars) $ 607  
2026 Forward Equity Agreement    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Period End Net Share Settlement Price, Common Shares (in shares) 1.0  
Net Cash (millions of dollars) $ 78  
Physical Share Delivery Proceeds (millions of dollars) $ 1,259