v3.25.2
Fair Value of Financial Assets and Liabilities - Commodity Derivatives (Details)
MWh in Millions, MMBTU in Millions, $ in Millions
Jun. 30, 2025
USD ($)
MMBTU
MWh
Dec. 31, 2024
MWh
MMBTU
cash flow hedge commodity [Member]    
Derivative [Line Items]    
Commodity contracts designated as cash flow hedges | $ $ 0  
Electric Commodity (in megawatt hours)    
Derivative [Line Items]    
Derivative, Nonmonetary Notional amount | MWh [1],[2] 1 1
Natural Gas Commodity (in million British thermal units)    
Derivative [Line Items]    
Derivative, Nonmonetary Notional amount | MMBTU [1],[2] 13 19
[1] Not reflective of net positions in the underlying commodities.
[2] Notional amounts for options included on a gross basis, but weighted for the probability of exercise.