| **Income Taxes - Narrative (Details) - USD ($) $ in Millions**                            | 3 Months Ended | 9 Months Ended |         |        |
|-------------------------------------------------------------------------------------------|----------------|----------------|---------|--------|
||
| **Operating Loss Carryforwards [Line Items]**                                             |           |           |    |   |   |   |
| Toll tax accrued                                                                          | $ 16           |           | $ 16    |   |   | $ 268 |
| Discrete tax benefit                                                                      | $ (59)         | $ 93           | (44)    | $ 917  |   |   |
| One-time Deemed Repatriation                                                              |           |           |    |   |   |   |
| **Operating Loss Carryforwards [Line Items]**                                             |           |           |    |   |   |   |
| Tax benefit from foreign tax credits                                                      |           |           | $ 252   |   |   |   |
| Installment period                                                                        |           |           | 8 years |   |   |   |
| Expense related to tax rate change adjustment                                             |           |           | $ 107   |   |   |   |
| Discrete tax benefit                                                                      |           |           | $ 145   |   |   |   |
| Tamar and Dalit Fields | Disposal Group, Disposed of by Sale, Not Discontinued Operations |           |           |    |   |   |   |
| **Operating Loss Carryforwards [Line Items]**                                             |           |           |    |   |   |   |
| Percentage of divestiture farmed out                                                      | 7.50%          |           | 7.50%   |   | 7.50% |   |

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| - Definition
Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.
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| - Definition
Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations, attributable to increase (decrease) in the income tax rates.
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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign tax credit.
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