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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
[1] | Includes embedded derivatives.

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- Definition Fair value as of the balance sheet date of the embedded derivative or group of embedded derivatives classified as a liability. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2)(i) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (bbb)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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