Derivatives (Classification of Gross Fair Values of Derivative Instruments, Excluding Cash Collateral) (Details) - USD ($) $ in Millions |
Jun. 30, 2026 |
Dec. 31, 2025 |
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|---|---|---|---|---|
| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent | Nonrelated Party [Member] | ||||
| Derivative [Line Items] | ||||
| Embedded Derivative, Fair Value of Embedded Derivative Liability | [1] | $ 9 | $ 6 | |
| Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesNoncurrent | Nonrelated Party [Member] | ||||
| Derivative [Line Items] | ||||
| Embedded Derivative, Fair Value of Embedded Derivative Liability | [1] | 38 | 35 | |
| Commodity Contract [Member] | Balance Sheet Location [Axis]: us-gaap:OtherLiabilitiesCurrent | Related Party [Member] | ||||
| Derivative [Line Items] | ||||
| Other Derivatives Not Designated as Hedging Instruments Liabilities at Fair Value | $ 14 | $ 0 | ||
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