XML 50 R41.htm IDEA: XBRL DOCUMENT v3.22.1
Risk Management (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2022
Mar. 31, 2021
Dec. 31, 2021
Net gain or (loss) recognized in the statement of income offset by regulatory accounting $ 198 $ 39  
Derivative, Net Liability Position, Aggregate Fair Value 117    
Collateral Already Posted, Aggregate Fair Value 5    
Collateral cash requirement 97    
Purchased power and fuel 202 $ 169  
Deposits, Wholesale 157   $ 58
Deposits 10    
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 4   3
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 4   3
Derivative Asset, Fair Value, Amount Offset Against Collateral 167    
Electricity [Member]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 1   1
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 1   1
Natural Gas [Member]      
Derivative Liability, Fair Value, Amount Not Offset Against Collateral 3   2
Derivative Liability, Fair Value, Amount Not Offset Against Collateral $ 3   $ 2