Consideration of Credit Risk and Concentrations (Details) - Credit Concentration Risk $ in Millions	Dec. 31, 2022 USD ($) Counterparty
Derivative [Line Items]
Number of most significant counterparties	10
Municipal or Cooperative Entities or Other Utilities
Derivative [Line Items]
Number of most significant counterparties	6
External Credit Rating, Investment Grade
Derivative [Line Items]
Number of most significant counterparties	4
Credit exposure for the most significant counterparties | $	$ 75
Percentage of credit exposure for the most significant counterparties	37.00%
Internal Investment Grade
Derivative [Line Items]
Number of most significant counterparties	4
Credit exposure for the most significant counterparties | $	$ 63
Percentage of credit exposure for the most significant counterparties	32.00%
External Credit Rating, Non Investment Grade [Member]
Derivative [Line Items]
Number of most significant counterparties	2
Credit exposure for the most significant counterparties | $	$ 62
Percentage of credit exposure for the most significant counterparties	31.00%