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Other disclosures - Additional information (Detail) £ in Millions, $ in Millions | 6 Months Ended |
--- | --- | ---
Jun. 30, 2018 USD ($) | Jun. 30, 2018 GBP (£) | Dec. 31, 2017 USD ($)
Other Disclosures [Line Items] |  |  |
Capital commitments | $ 2,562.0 |  | $ 2,641.0
Contractual capital commitments | 500.0 |  | 500.0
Contingent liabilities indemnities and other performance guarantees | 522.0 |  | 552.0
Simandou [member] |  |  |
Other Disclosures [Line Items] |  |  |
Contractual payments | 10.5 |  |
United Kingdoms Financial Conduct Authority (FCA) [Member] |  |  |
Other Disclosures [Line Items] |  |  |
Financial penalty | 36.4 | £ 27.4 |
Joint ventures [Member] |  |  |
Other Disclosures [Line Items] |  |  |
Capital commitments | $ 153.0 |  | $ 29.0

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- Definition The amount of the estimated financial effect of contingent liabilities. [Refer: Contingent liabilities [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 37 -IssueDate 2017-01-01 -Paragraph 86 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=37&date=2017-03-01&anchor=para_86_a&doctype=Standard -URIDate 2017-03-09 + Details
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