v3.25.2
Money Pool (Details) - USD ($)
$ in Millions
3 Months Ended 12 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Short-term Debt [Line Items]    
Amount outstanding at period end $ 0 $ 195
Money Pool    
Short-term Debt [Line Items]    
Borrowing limit 250 250
Amount outstanding at period end 0 0
Average amount outstanding 58 10
Maximum amount outstanding $ 250 $ 139
Weighted average interest rate, computed on a daily basis 4.33% 4.82%