v3.26.1
Borrowings and Other Financing Instruments Equity through DRIP and Benefits Program (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Forward Contract Indexed to Issuer's Equity [Line Items]    
Proceeds from issuance of common stock $ 11 $ 1,143
Dividend Reinvestment Program    
Forward Contract Indexed to Issuer's Equity [Line Items]    
Proceeds from issuance of common stock $ 64 $ 39