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Investment in Associates and Joint Ventures - Summarised Aggregated Financial Information for Individually Immaterial Associates and Joint Ventures (Detail) - Before exceptional items [member] - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of investment in associates and joint ventures [line items] |  |  |
Operating profits before exceptional items | $ 7 | $ 7 | $ 6
Joint ventures [member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Operating profits before exceptional items | 5 | 1 | 1
Associates [member] |  |  |
Disclosure of investment in associates and joint ventures [line items] |  |  |
Operating profits before exceptional items | $ 2 | $ 6 | $ 5

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- Definition The entity's share of the profit (loss) from continuing operations of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Continuing operations [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss) from continuing operations] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 12 -IssueDate 2018-01-01 -Paragraph B16 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=12&date=2018-03-01&anchor=para_B16_a&doctype=Appendix&seq=2 -URIDate 2018-03-16 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition Disclosure of investment in associates and joint ventures. + References No definition available. + Details
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- Details
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- Details
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- Details
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