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Hedging Activities and Fair Value Measurements - Schedule of Recurring Fair Value Measurements (Details) - Fair Value, Recurring - USD ($) $ in Millions | Sep. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Commodity derivatives: |  |
Impact of CME Rule 814 | $ (309) | $ (223)
Total commodity derivatives | 476 | 575
Total | 476 | 575
Commodity derivatives: |  |
Impact of CME Rule 814 | (271) | (221)
Total commodity derivatives | 418 | 495
Total | 418 | 495
Commodity Derivative Before CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 785 | 798
Commodity derivatives: |  |
Total commodity derivatives | 689 | 716
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) |  |
Commodity derivatives: |  |
Impact of CME Rule 814 | (98) | (56)
Total commodity derivatives | 178 | 299
Total | 178 | 299
Commodity derivatives: |  |
Impact of CME Rule 814 | (28) | (43)
Total commodity derivatives | 166 | 248
Total | 166 | 248
Quoted Prices in Active Markets for Identical Assets and Liabilities (Level 1) | Commodity Derivative Before CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 276 | 355
Commodity derivatives: |  |
Total commodity derivatives | 194 | 291
Significant Other Observable Inputs (Level 2) |  |
Commodity derivatives: |  |
Impact of CME Rule 814 | (211) | (167)
Total commodity derivatives | 298 | 276
Total | 298 | 276
Commodity derivatives: |  |
Impact of CME Rule 814 | (242) | (157)
Total commodity derivatives | 252 | 247
Total | 252 | 247
Significant Other Observable Inputs (Level 2) | Commodity Derivative Before CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 509 | 443
Commodity derivatives: |  |
Total commodity derivatives | 494 | 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 | (1) | (21)
Total commodity derivatives | 0 | 0
Total | 0 | 0
Significant Unobservable Inputs (Level 3) | Commodity Derivative Before CME Rule 814 |  |
Commodity derivatives: |  |
Total commodity derivatives | 0 | 0
Commodity derivatives: |  |
Total commodity derivatives | $ 1 | $ 21

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