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Summary of Significant Accounting Policies, Part 3 (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Environmental Reserves [Abstract] |  |  |  |
Environmental reserves |  | $ 9 | $ 4 |
Asset Impairment Charges [Abstract] |  |  |  |
Impairment of property, plant and equipment |  | 50 | 20 | $ 41
Impairment charges in operating costs and expenses |  | 57 | 30 | 53
Total asset impairment charges |  | 57 | 32 | 53
Operating costs and expenses [Member] |  |  |  |
Asset Impairment Charges [Abstract] |  |  |  |
Impairment of property, plant and equipment |  | 50 | 18 | 41
Other impairments | [1] | 7 | 12 | 12
Impairment charges in operating costs and expenses | [2] | 57 | 30 | 53
General and administrative costs [Member] |  |  |  |
Asset Impairment Charges [Abstract] |  |  |  |
Impairment of property, plant and equipment | [3] | $ 0 | $ 2 | $ 0
[1] | Primarily represents the write-down of surplus materials classified as “Other assets” on our Consolidated Balance Sheets.
[2] | Amounts presented are a component of “Third party and other costs” within the “Operating costs and expenses” section of our Statements of Consolidated Operations.
[3] | Amounts presented are a component of “Third party and other costs” within the “General and administrative costs” section of our Statements of Consolidated Operations.

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