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About the presentation of our financial statements - Exchange rate (Details) - USD ($) | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Pound sterling |  |  |
Disclosure Of Foreign Exchange Rates [Line Items] |  |  |
Full-year average | 1.28 | 1.24 | 1.24
Year-end | 1.25 | 1.28 | 1.21
Australian dollar |  |  |
Disclosure Of Foreign Exchange Rates [Line Items] |  |  |
Full-year average | 0.66 | 0.66 | 0.69
Year-end | 0.62 | 0.69 | 0.68
Canadian dollar |  |  |
Disclosure Of Foreign Exchange Rates [Line Items] |  |  |
Full-year average | 0.73 | 0.74 | 0.77
Year-end | 0.70 | 0.76 | 0.74
Euro |  |  |
Disclosure Of Foreign Exchange Rates [Line Items] |  |  |
Full-year average | 1.08 | 1.08 | 1.05
Year-end | 1.04 | 1.11 | 1.07
South African rand |  |  |
Disclosure Of Foreign Exchange Rates [Line Items] |  |  |
Full-year average | 0.055 | 0.054 | 0.061
Year-end | 0.053 | 0.054 | 0.059

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- Definition The average exchange rate used by the entity. Exchange rate is the ratio of exchange for two currencies. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The spot exchange rate at the end of the reporting period. Exchange rate is the ratio of exchange for two currencies. Spot exchange rate is the exchange rate for immediate delivery. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition Disclosure of foreign exchange rates. + References No definition available. + Details
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- Details
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- Details
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