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Auditors' remuneration - Auditors' remuneration (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Auditors Remuneration [Line Items] |  |  |
Audit of the Group | $ 16.7 | $ 14.3 | $ 13.5
Audit-related assurance service | 0.9 | 1.0 | 0.9
Other assurance services | 3.3 | 2.3 | 0.6
Total assurance services | 4.2 | 3.3 | 1.5
Tax compliance |  | 0.3 | 0.5
Tax advisory services |  | 0.2 | 0.1
Other non-audit services not covered above | 0.2 | 0.7 | 1.8
Total non-audit services | 4.4 | 4.5 | 3.9
Total Group Auditors’ remuneration | 21.1 | 18.8 | 17.4
Audit of the financial statements of the Group’s subsidiaries | 1.4 | 2.0 | 2.1
Fees in respect of pension scheme audits | 0.1 | 0.5 | 0.3
Total audit fees payable to other accounting firms | 1.5 | 2.5 | 2.4
Rio Tinto [member] |  |  |
Auditors Remuneration [Line Items] |  |  |
Audit of the Group | 9.2 | 6.2 | 4.5
Subsidiaries [Member] |  |  |
Auditors Remuneration [Line Items] |  |  |
Audit of the Group | $ 7.5 | $ 8.1 | $ 9.0

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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 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + 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 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + 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 2017-01-01 -Paragraph 112 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2017-03-01&anchor=para_112_c&doctype=Standard -URIDate 2017-03-09 + Details
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- Definition Audit Fee Of Financial Statements Of Subsidiaries + References No definition available. + Details
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- Definition Audit services paid to the auditors in respect of employee pension plans. + References No definition available. + Details
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- Definition Auditors' fees for tax compliance services. + References No definition available. + Details
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- Definition Auditors remuneration for assurance services. + References No definition available. + Details
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- Definition Auditors remuneration for audit related assurance services. + References No definition available. + Details
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- Definition Total Fees paid as non audit fees to auditors for services. + References No definition available. + Details
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- Definition Auditors Remuneration [Line Items] + References No definition available. + Details
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- Details
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- Details
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