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Auditors' remuneration (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Auditors Remuneration [Line Items] |  |  |
Total audit | $ 28.1 | $ 26.6 | $ 25.7
Audit-related assurance service | 1.7 | 1.1 | 1.0
Other assurance services | 3.5 | 3.0 | 2.3
Total assurance services | 5.2 | 4.1 | 3.3
Tax compliance | 0.0 | 0.0 | 0.0
Other non-audit services not covered above | 0.2 | 0.1 | 0.3
Total non-audit services | 5.4 | 4.2 | 3.6
Total Group auditors’ remuneration | 33.5 | 30.8 | 29.3
Audit fees | 30.0 | 27.7 | 27.0
Audit-related fees | 3.3 | 3.0 | 2.0
Tax fees | 0.0 | 0.0 | 0.0
All other fees | 0.2 | 0.1 | 0.3
Audit of the financial statements of the Group’s subsidiaries | 0.3 | 0.3 | 0.2
Fees in respect of pension scheme audits | 0.1 | 0.1 | 0.1
Total audit fees payable to other accounting firms | 0.4 | 0.4 | 0.3
KPMG |  |  |
Auditors Remuneration [Line Items] |  |  |
Total Group auditors’ remuneration | 33.5 | 30.8 | 29.3
Rio Tinto |  |  |
Auditors Remuneration [Line Items] |  |  |
Total audit | 20.7 | 19.1 | 17.3
Total for all subsidiaries |  |  |
Auditors Remuneration [Line Items] |  |  |
Total audit | $ 7.4 | $ 7.5 | $ 8.4

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- Definition The amount of fees paid or payable to the entity's auditors. + 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 amount of fees paid or payable to the entity's auditors for auditing services. + 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 amount of fees paid or payable to the entity's auditors for services that the entity does not separately disclose in the same statement or note. + 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 amount of fees paid or payable to the entity's auditors for tax services. + 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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