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Hedging Activities and Fair Value Measurements - Schedule of Gains and Losses on Derivative Instruments and Related Hedged Items (Details) - USD ($) $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024
Derivatives not designated as hedging instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) Recognized in Income on Derivative | $ 71 | $ (5) | $ 48 | $ 7
Commodity Derivative Instruments | Revenue | Derivatives not designated as hedging instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) Recognized in Income on Derivative | 68 | (5) | 47 | 8
Commodity Derivative Instruments | Operating costs and expenses | Derivatives not designated as hedging instruments: |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) Recognized in Income on Derivative | 3 | 0 | 1 | (1)
Fair value hedge |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) Recognized in Income on Derivative | 3 | 0 | 4 | 1
Gain (Loss) Recognized in Income on Hedged Item | (2) | 1 | (2) | 5
Fair value hedge | Commodity Derivative Instruments |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) Recognized in Income on Derivative | $ 3 | $ 0 | $ 4 | $ 1
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Revenues | Revenues | Revenues | Revenues
Fair value hedge | Commodity Derivative Instruments | Revenue |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) Recognized in Income on Hedged Item | $ (2) | $ 1 | $ (2) | $ 5
Cash flow hedge |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative | 12 | 79 | 36 | (81)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income | 61 | 46 | 36 | 50
Cash flow hedge | Interest Rate Derivative Instruments |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative | 12 | 0 | 14 | 2
Cash flow hedge | Interest Rate Derivative Instruments | Interest expense |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income | 2 | 1 | 3 | 3
Cash flow hedge | Commodity Derivative Instruments | Revenue |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative | 19 | 74 | 37 | (75)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income | 67 | 61 | 53 | 80
Cash flow hedge | Commodity Derivative Instruments | Operating costs and expenses |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Change in Value Recognized in Other Comprehensive Income (Loss) on Derivative | (19) | 5 | (15) | (8)
Gain (Loss) Reclassified from Accumulated Other Comprehensive Income (Loss) to Income | $ (8) | $ (16) | $ (20) | $ (33)

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