Exploration and evaluation of oil and gas reserves (Details) - USD ($) $ in Millions |
6 Months Ended | |
|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
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| Property plant and equipment | ||
| Balance at December 31, 2024 | $ 168,040 | $ 136,285 |
| Additions | 15,030 | 15,934 |
| Balance at June 30, 2025 | 185,694 | 163,627 |
| Intangible assets | ||
| Opening Balance | 2,523 | |
| Closing Balance | 2,732 | |
| Capitalized Exploratory Well Costs / Capitalized Acquisition Costs | 4,815 | 3,693 |
| Capitalised development expenditure [member] | ||
| Intangible assets | ||
| Opening Balance | 1,664 | 1,609 |
| Translation adjustment | 104 | 208 |
| Losses on exploration expenditures written off | (164) | |
| Closing Balance | 1,775 | 1,653 |
| Capitalized Acquistion Costs [Member] | ||
| Property plant and equipment | ||
| Balance at December 31, 2024 | 2,427 | 1,475 |
| Additions | 490 | 501 |
| Write-offs | (16) | (4) |
| Transfers | (84) | |
| Translation adjustment | 139 | 196 |
| Losses on exploration expenditures written off | (44) | |
| Balance at June 30, 2025 | 3,040 | 2,040 |
| Capitalised development expenditure [member] | ||
| Intangible assets | ||
| Additions | $ 7 | |
| X | ||||||||||
- Definition The amount of additions to property, plant and equipment other than those acquired through business combinations. [Refer: Total for all business combinations [member]; Property, plant and equipment] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition The decrease in property, plant and equipment resulting from disposals and retirements. [Refer: Property, plant and equipment] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The increase (decrease) in property, plant and equipment resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Property, plant and equipment] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of intangible assets and goodwill held by the entity. [Refer: Goodwill; Intangible assets other than goodwill] Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition The amount of tangible assets that: (a) are held for use in the production or supply of goods or services, for rental to others, or for administrative purposes; and (b) are expected to be used during more than one period. Note that right-of-use assets are not included. [Contrast: Property, plant and equipment including right-of-use assets] Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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