Impairment of Exploration and Evaluation and Oil and Gas Properties - Summary of Carrying Amount of Goodwill Allocated to CGUs (Parentheticals) (Detail) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disclosure of information for cash-generating units [line items]
Carrying amount of goodwill	$ 3,995	$ 4,614	$ 0

The amount of assets representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognised. [Refer: Business combinations [member]]

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