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Derivatives (Classification of Gross Fair Values of Derivative Instruments, Excluding Cash Collateral) (Details) - USD ($) $ in Millions | Mar. 31, 2026 | Dec. 31, 2025
--- | --- | ---
Other Noncurrent Liabilities [Member] | Nonrelated Party [Member] |  |  |
Derivative [Line Items] |  |  |
Embedded Derivative, Fair Value of Embedded Derivative Liability | [1] | $ 43 | $ 35
Other Current Liabilities [Member] | Nonrelated Party [Member] |  |  |
Derivative [Line Items] |  |  |
Embedded Derivative, Fair Value of Embedded Derivative Liability | [1] | 11 | 6
Commodity Contract [Member] | Other Current Liabilities [Member] | Related Party [Member] |  |  |
Derivative [Line Items] |  |  |
Other Derivatives Not Designated as Hedging Instruments Liabilities at Fair Value |  | $ 51 | $ 0
[1] | Includes embedded derivatives.

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