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Commitments - Schedule of Commitments (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Capital expenditure |  |
Contracted for Operating leases | $ 44.5 | $ 46.2
Within one year [member] |  |
Capital expenditure |  |
Operating lease commitment | 66.6 | 42.5
Later than one and not later than five years [member] |  |
Capital expenditure |  |
Operating lease commitment | 257.9 | 229.9
Later than five years [member] |  |
Capital expenditure |  |
Operating lease commitment | $ 448.0 | $ 277.3

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- Definition Operating lease commitment. + References No definition available. + Details
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- References No definition available. + Details
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- Definition The amount of capital commitments for which the entity has entered into a contract. [Refer: Capital commitments] + 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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- Details
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- Details
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- Details
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