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Subsequent Event (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2023		Dec. 31, 2022	Sep. 30, 2023
Subsequent Event [Line Items]
Redemptions and repurchases of power bonds	$ 1	[1]	$ 1
Current regulatory assets	251			$ 178
Interest expense	262		$ 262
Non-current regulatory assets	5,551			5,566
Unrealized gains/losses on commodity derivatives
Subsequent Event [Line Items]
Current regulatory assets	213			136
Non-current regulatory assets	$ 98			$ 52
[1] (1) All redemptions were at 100 percent of par.

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- Definition

Interest and debt related expenses associated with nonoperating financing activities of the entity.

+ References

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Carrying amount as of the balance sheet date of capitalized costs of regulated entities that are expected to be recovered through revenue sources within one year or the normal operating cycle, if longer. Such costs are capitalized if they meet both of the following criteria: a. It is probable that future revenue in an amount at least equal to the capitalized cost will result from inclusion of that cost in allowable costs for rate-making purposes. b. Based on available evidence, the future revenue will be provided to permit recovery of the previously incurred cost rather than to provide for expected levels of similar future costs. If the revenue will be provided through an automatic rate-adjustment clause, this criterion requires that the regulator's intent clearly be to permit recovery of the previously incurred cost.

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Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

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