Financial Instruments and Risk Management (Reconciliation of Unrealized Risk Management Positions) (Details) - USD ($) $ in Millions |
3 Months Ended | 6 Months Ended | ||
|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
|
| Derivative [Line Items] | ||||
| Fair Value of Contracts, Beginning of Year | $ 75 | |||
| Fair Value of NuVista Contracts Acquired (See Note 9) | 169 | |||
| Settlement of NuVista Contracts from Business Combination | (55) | |||
| Fair Value of Contracts Realized During the Period | $ 68 | $ (33) | 78 | $ 35 |
| Fair Value of Contracts, End of Period | 326 | 326 | ||
| Unrealized Gain (Loss) on Derivatives | 190 | 56 | 137 | 97 |
| Commodity Contract [Member] | ||||
| Derivative [Line Items] | ||||
| Increase (Decrease) in Derivative Assets and Liabilities | 59 | 62 | ||
| Fair Value of Contracts Realized During the Period | 68 | (33) | 78 | (63) |
| Unrealized Gain (Loss) on Derivatives | $ 190 | $ 54 | $ 137 | $ 8 |
| X | ||||||||||
- Definition Fair values as of the balance sheet date of the net amount of all assets and liabilities resulting from contracts that meet the criteria of being accounted for as derivative instruments and guarantee obligations. No definition available.
|
| X | ||||||||||
- Definition Settlement of contracts from business combination. No definition available.
|
| X | ||||||||||
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The fair value of assets acquired in noncash investing or financing activities. Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The difference between the book value and the sale price of options, swaps, futures, forward contracts, and other derivative instruments. This element refers to the gain (loss) included in earnings. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Definition The increase (decrease) during the period in the net carrying value of derivative instruments reported as assets and liabilities that are due to be disposed of within one year (or the normal operating cycle, if longer). Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
|
| X | ||||||||||
- Definition The net change in the difference between the fair value and the carrying value, or in the comparative fair values, of derivative instruments, including options, swaps, futures, and forward contracts, held at each balance sheet date, that was included in earnings for the period. Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
|
| X | ||||||||||
- Details
|