Financial instruments related to commodity contracts - Cash flow hedge (Details) - Derivative financial instruments related to commodity contracts - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Cash flow hedge
Profit (Loss) recorded in other comprehensive income of the period	$ 2,670	$ 2,770	$ (5,524)
Recycled amount from other comprehensive income to the income statement of the period	(2,671)	117	1,317
Cash flow hedge
Cash flow hedge
Ineffective portion of hedge	$ 127	$ 124	$ 132

The amount of reclassification adjustments related to cash flow hedges, net of tax. Reclassification adjustments are amounts reclassified to profit (loss) in the current period that were recognised in other comprehensive income in the current or previous periods. [Refer: Cash flow hedges [member]; Other comprehensive income]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 1
-IssueDate 2024-01-01
-Paragraph 92
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_92&doctype=Standard
-URIDate 2024-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 24E
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24E_a&doctype=Standard
-URIDate 2024-03-27

Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2024-01-01
-Paragraph 24C
-Subparagraph b
-Clause iv
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2024-en-r&anchor=para_24C_b_iv&doctype=Standard
-URIDate 2024-03-27

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