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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	10
Municipal or Cooperative Entities or Other Utilities
Derivative [Line Items]
Number of most significant counterparties	8
External Credit Rating, Investment Grade
Derivative [Line Items]
Number of most significant counterparties	4
Credit exposure for the most significant counterparties | $	$ 49
Percentage of credit exposure for the most significant counterparties	23.00%
Internal Investment Grade
Derivative [Line Items]
Number of most significant counterparties	5
Credit exposure for the most significant counterparties | $	$ 78
Percentage of credit exposure for the most significant counterparties	37.00%
External Credit Rating, Non Investment Grade [Member]
Derivative [Line Items]
Number of most significant counterparties	1
Credit exposure for the most significant counterparties | $	$ 45
Percentage of credit exposure for the most significant counterparties	21.00%

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 815
-SubTopic 40
-Name Accounting Standards Codification
-Section 50
-Paragraph 5
-Subparagraph (f)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147480237/815-40-50-5

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Number of the entity's most significant counterparties for wholesale, trading and non-trading commodity activities with credit exposure.

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