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Derivatives and Risk Management Activities - Narrative (Details) bbl in Millions, $ in Millions, $ in Billions | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2026 USD ($) | Jun. 30, 2025 USD ($) | Jun. 30, 2026 USD ($) bbl | Jun. 30, 2025 USD ($) | Jun. 30, 2026 CAD ($) | Dec. 31, 2025 USD ($)
Derivatives and Risk Management Activities |  |  |  |  |  |
Deferred gain (loss) on accumulated other comprehensive income (loss), net of tax | $ (27) |  | $ (27) |  |  |
Total net derivative asset/(liability) | (43) |  | $ (43) |  |  | $ 4
Crude Oil Purchases | Long |  |  |  |  |  |
Derivatives and Risk Management Activities |  |  |  |  |  |
Derivative position notional amount (in barrels) | bbl |  |  | 8.1 |  |  |
Time Spread on Hedging Anticipated Crude Oil Lease Gathering Purchases | Short |  |  |  |  |  |
Derivatives and Risk Management Activities |  |  |  |  |  |
Derivative position notional amount (in barrels) | bbl |  |  | 2.1 |  |  |
Crude Oil Basis Spread Position |  |  |  |  |  |
Derivatives and Risk Management Activities |  |  |  |  |  |
Derivative position notional amount (in barrels) | bbl |  |  | 2.6 |  |  |
Anticipated Net Sales of Crude Oil and NGL Inventory | Short |  |  |  |  |  |
Derivatives and Risk Management Activities |  |  |  |  |  |
Derivative position notional amount (in barrels) | bbl |  |  | 7.8 |  |  |
Foreign currency derivatives |  |  |  |  |  |
Derivatives and Risk Management Activities |  |  |  |  |  |
Derivative, notional amount |  |  |  |  | $ 4.5 |
Total net derivative asset/(liability) | 20 |  | $ 20 |  |  | $ 8
Derivative gain (loss) on derivative, net | $ (41) | $ (49) | $ 12 | $ (49) |  |

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