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Included in (Loss)/Profit Before Royalties and Taxation - Schedule of Amounts Included in (Loss)/Profit Before Royalties and Taxation (Parenthetical) (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Line items represents amounts included in profit before royalties and taxation [line items] |  |  |
Restructuring costs | $ 113.9 | $ 9.2 | $ 11.7
South deep [member] |  |  |
Line items represents amounts included in profit before royalties and taxation [line items] |  |  |
Restructuring costs | 11.2 | 2.3 | 0.0
Damang [member] |  |  |
Line items represents amounts included in profit before royalties and taxation [line items] |  |  |
Restructuring costs | 13.9 | 2.2 | 9.9
Tarkwa [member] |  |  |
Line items represents amounts included in profit before royalties and taxation [line items] |  |  |
Restructuring costs | 88.8 | 4.7 | 0.2
Australia [member] |  |  |
Line items represents amounts included in profit before royalties and taxation [line items] |  |  |
Restructuring costs | $ 0.0 | $ 0.0 | $ 1.6

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- Definition Line items represents amounts included in profit before royalties and taxation. + References No definition available. + Details
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- Definition The amount of expense relating to restructuring. Restructuring is a programme that is planned and controlled by management and materially changes either the scope of a business undertaken by an entity or the manner in which that business is conducted. Such programmes include: (a) the sale or termination of a line of business; (b) closure of business locations in a country or region or the relocation of activities from one country or region to another; (c) changes in management structure; and (d) fundamental reorganisations that have a material effect on the nature and focus of the entity's operations. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 98 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_98_b&doctype=Standard -URIDate 2018-03-16 + Details
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- Details
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