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Risk Management Activities and Derivative Transactions Risk Management Activities and Derivative Transactions - Other Derivative Instruments (Details) - USD ($) $ in Millions	Sep. 30, 2025	Sep. 30, 2024
Derivative
Forward Contract Derivative Asset, at Fair Value	$ 16	$ 11
Derivative Liability, Subject to Master Netting Arrangement, after Offset	884	1,122
Fair Value, Inputs, Level 2
Derivative
Forward Contract Derivative Asset, at Fair Value	$ 16	$ 11

X

- Definition

Fair value as of the balance sheet date of forward contract derivative assets.

+ References

No definition available.

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- Definition

Fair value, after effect of master netting arrangement, of financial liability or contract with one or more underlyings, notional amount or payment provision or both, and contract can be net settled by means outside contract or delivery of asset. Includes derivative subject to master netting arrangement not elected or qualified to offset. Excludes derivative not subject to master netting arrangement or similar agreement.

+ References

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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

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