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Taxes - Summary of Reconciliation of Deferred Tax Balance Sheet (Detail) - USD ($) $ in Millions | Dec. 31, 2022 | Dec. 31, 2021
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Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | $ 1,959 | $ 1,007
Deferred tax liabilities | 2,457 | 878
Petroleum Resource Rent Tax [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 1,821 | 1,007
Deferred tax liabilities | 613 |
Petroleum Resource Rent Tax [member] | Production and growth assets [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 1,460 | 767
Deferred tax liabilities | 1,281 |
Petroleum Resource Rent Tax [member] | Augmentation for current year [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 113 | 166
Deferred tax liabilities | (62) |
Petroleum Resource Rent Tax [member] | Provisions [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 271 | 75
Deferred tax liabilities | (743) |
Petroleum Resource Rent Tax [member] | Other [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | (23) | (1)
Deferred tax liabilities | 137 |
Income Tax [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 1,959 | 1,007
Deferred tax liabilities | 2,457 | 878
Income Tax [member] | Provisions [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 60 |
Deferred tax liabilities | (1,280) | (706)
Income Tax [member] | Other [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 34 |
Deferred tax liabilities | (89) | (32)
Income Tax [member] | Oil and gas properties [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | (1,496) |
Deferred tax liabilities | 2,857 | 1,520
Income Tax [member] | Exploration and evaluation assets [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 30 |
Deferred tax liabilities | 67 | 51
Income Tax [member] | Lease assets and liabilities [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 23 |
Deferred tax liabilities | (22) | (38)
Income Tax [member] | PRRT assets and liabilities [Member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax liabilities | 347 | 303
Income Tax [member] | Unused tax losses and tax credits [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 1,464 |
Income Tax [member] | Assets held for sale [Member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax liabilities |  | (205)
Income Tax [member] | Derivatives [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 23 |
Deferred tax liabilities | (36) | (15)
Income Tax [member] | Income tax deferred tax [member] |  |
Disclosure Of Reconciliation Of Deferred Tax Balance Sheet [Line Items] |  |
Deferred tax assets | 138 |
Deferred tax liabilities | $ 1,844 | $ 878

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