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Investment in Associates and Joint Ventures - Summary of Investments in Associates and Joint Ventures (Detail) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | $ 141 | $ 111 |
Share of profits/(losses) | 1 | (3) | $ 2
Ending balance | 104 | 141 | 111
Cost [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | 178 | 139 |
Additions | 3 | 47 |
Share of profits/(losses) | (1) | 3 |
Disposals |  | (9) |
Distributions | (37) | (4) |
Exchange | (3) | 2 |
Ending balance | 140 | 178 | 139
Accumulated impairment [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | (37) | (28) |
Charge for the year |  | (18) |
Disposals |  | 9 |
Exchange | 1 |  |
Ending balance | (36) | (37) | (28)
Joint ventures [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | 27 | 26 |
Ending balance | 0 | 27 | 26
Joint ventures [member] | Cost [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | 27 | 26 |
Share of profits/(losses) | 5 | 1 |
Distributions | (32) |  |
Ending balance | 0 | 27 | 26
Joint ventures [member] | Accumulated impairment [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Ending balance | 0 |  |
Associates [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | 114 | 85 |
Ending balance | 104 | 114 | 85
Associates [member] | Cost [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | 151 | 113 |
Additions | 3 | 47 |
Share of profits/(losses) | (6) | 2 |
Disposals |  | (9) |
Distributions | (5) | (4) |
Exchange | (3) | 2 |
Ending balance | 140 | 151 | 113
Associates [member] | Accumulated impairment [member] |  |  |
Disclosure of associates and joint ventures [line items] |  |  |
Beginning balance | (37) | (28) |
Charge for the year |  | (18) |
Disposals |  | 9 |
Exchange | 1 |  |
Ending balance | $ (36) | $ (37) | $ (28)

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- Definition The amount of investments in subsidiaries, joint ventures and associates in an entity's separate financial statements. [Refer: Associates [member]; Joint ventures [member]; Subsidiaries [member]; Investments in subsidiaries] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 27 -IssueDate 2018-01-01 -Paragraph 10 -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=27&date=2018-03-01&anchor=para_10&doctype=Standard -URIDate 2018-03-16 + Details
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- Definition The entity's share of the profit (loss) of associates and joint ventures accounted for using the equity method. [Refer: Associates [member]; Investments accounted for using equity method; Joint ventures [member]; Profit (loss)] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 23 -Subparagraph g -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_23_g&doctype=Standard -URIDate 2018-03-16 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 8 -IssueDate 2018-01-01 -Paragraph 28 -Subparagraph e -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=8&date=2018-03-01&anchor=para_28_e&doctype=Standard -URIDate 2018-03-16 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Note Effective on first application of IFRS 9 -Name IFRS -Number 4 -IssueDate 2018-01-01 -Paragraph 39M -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=4&date=2018-03-02&anchor=para_39M_b&doctype=Standard&book=b -URIDate 2018-03-16 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Name IAS -Number 1 -IssueDate 2018-01-01 -Paragraph 82 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IAS&num=1&date=2018-03-01&anchor=para_82_c&doctype=Standard -URIDate 2018-03-16 + Details
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