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Loans and other borrowings - Summary of Unutilised Facilities (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Disclosure of facilities provided by banks [Line Items] |  |
Unutilised facilities provided by banks | $ 1,155 | $ 1,310
Less than 1 year [member] |  |
Disclosure of facilities provided by banks [Line Items] |  |
Unutilised facilities provided by banks | 69 | 70
After two but before five years [member] |  |
Disclosure of facilities provided by banks [Line Items] |  |
Unutilised facilities provided by banks | $ 1,086 | $ 1,240

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- Definition The amount of undrawn borrowing facilities that may be available for future operating activities and to settle capital commitments. [Refer: Capital commitments] + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Name IAS -Number 7 -IssueDate 2017-01-01 -Paragraph 50 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=7&date=2017-03-01&anchor=para_50_a&doctype=Standard -URIDate 2017-03-09 + Details
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- Details
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- Details
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