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Consideration of Credit Risk and Concentrations (Details) - Credit Concentration Risk
$ in Millions
Dec. 31, 2023
USD ($)
Counterparty
Derivative [Line Items]  
Number of most significant counterparties for wholesale, trading and non-trading commodity activities with credit exposure 10
Municipal or Cooperative Entities or Other Utilities  
Derivative [Line Items]  
Number of most significant counterparties for wholesale, trading and non-trading commodity activities with credit exposure 8
External Credit Rating, Investment Grade  
Derivative [Line Items]  
Number of most significant counterparties for wholesale, trading and non-trading commodity activities with credit exposure 4
Wholesale, trading and non trading commodity credit exposure for the most significant counterparties | $ $ 30
Percentage of wholesale, trading and non trading commodity credit exposure for the most significant counterparties 36.00%
External Credit Rating, Non Investment Grade [Member]  
Derivative [Line Items]  
Number of most significant counterparties for wholesale, trading and non-trading commodity activities with credit exposure 0
Internal Investment Grade  
Derivative [Line Items]  
Number of most significant counterparties for wholesale, trading and non-trading commodity activities with credit exposure 6
Wholesale, trading and non trading commodity credit exposure for the most significant counterparties | $ $ 40
Percentage of wholesale, trading and non trading commodity credit exposure for the most significant counterparties 48.00%