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Hedging Activities and Fair Value Measurements - Schedule of Recurring Fair Value Measurements (Details) - Fair Value, Recurring - USD ($) $ in Millions | Dec. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Commodity derivatives: |  |
Impact of CME Rule 814 | $ (489) | $ (223)
Total commodity derivatives | 460 | 575
Total | 460 | 575
Commodity derivatives: |  |
Impact of CME Rule 814 | (379) | (221)
Total commodity derivatives | 363 | 495
Total | 363 | 495
Value before application of CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 949 | 798
Commodity derivatives: |  |
Total commodity derivatives | 742 | 716
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  |
Commodity derivatives: |  |
Impact of CME Rule 814 | (170) | (56)
Total commodity derivatives | 2 | 299
Total | 2 | 299
Commodity derivatives: |  |
Impact of CME Rule 814 | (31) | (43)
Total commodity derivatives | 1 | 248
Total | 1 | 248
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Value before application of CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 172 | 355
Commodity derivatives: |  |
Total commodity derivatives | 32 | 291
Significant Other Observable Inputs (Level 2) |  |
Commodity derivatives: |  |
Impact of CME Rule 814 | (319) | (167)
Total commodity derivatives | 458 | 276
Total | 458 | 276
Commodity derivatives: |  |
Impact of CME Rule 814 | (348) | (157)
Total commodity derivatives | 362 | 247
Total | 362 | 247
Significant Other Observable Inputs (Level 2) | Value before application of CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 777 | 443
Commodity derivatives: |  |
Total commodity derivatives | 710 | 404
Significant Unobservable Inputs (Level 3) |  |
Commodity derivatives: |  |
Impact of CME Rule 814 | 0 | 0
Total commodity derivatives | 0 | 0
Total | 0 | 0
Commodity derivatives: |  |
Impact of CME Rule 814 | 0 | (21)
Total commodity derivatives | 0 | 0
Total | 0 | 0
Significant Unobservable Inputs (Level 3) | Value before application of CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 0 | 0
Commodity derivatives: |  |
Total commodity derivatives | $ 0 | $ 21

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