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Derivatives and Risk Management - Schedule of Collateral Outstanding Related to Energy Commodity Derivative Instruments (Details) - Commodity Contracts [Member] - USD ($) $ in Millions	Sep. 30, 2025	Dec. 31, 2024
Derivative [Line Items]
Cash collateral posted	$ 7	$ 24
Letters of credit outstanding	7	$ 12
Liabilities with credit-risk-related contingent features	22
Additional collateral to post	$ 21

X

- Definition

The aggregate fair value of additional assets that would be required to be posted as collateral for derivative instruments with credit-risk-related contingent features if the credit-risk-related contingent features were triggered at the end of the reporting period.

+ References

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-Topic 815
-SubTopic 10
-Name Accounting Standards Codification
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- Definition

The aggregate fair value of assets that are already posted, at the end of the reporting period, as collateral for derivative instruments with credit-risk-related contingent features.

+ References

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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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-Topic 815
-SubTopic 20
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- Definition

The aggregate fair value amounts of derivative instruments that contain credit-risk-related contingent features that are in a net liability position at the end of the reporting period. For nonderivative instruments that are designated and qualify as hedging instruments, the fair value amounts are the carrying value of the nonderivative hedging instrument, including the adjustment for the foreign currency transaction gain (loss) on that instrument.

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- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

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