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Other financial assets - Schedule of Other Financial Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2017 | Dec. 31, 2016
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Disclosure of financial assets [Line Items] |  |
Equity securities available-for-sale | $ 127 | $ 156
Loans and receivables | 117 | 112
Total other financial assets | 244 | 268
Current | 16 | 20
Non-current | 228 | 248
Total other financial assets | 244 | 268
Quoted equity shares [member] |  |
Disclosure of financial assets [Line Items] |  |
Equity securities available-for-sale | 10 | 14
Unquoted equity shares [member] |  |
Disclosure of financial assets [Line Items] |  |
Equity securities available-for-sale | 117 | 142
Trade deposits and loans [member] |  |
Disclosure of financial assets [Line Items] |  |
Loans and receivables | 43 | 43
Restricted funds [member] |  |
Disclosure of financial assets [Line Items] |  |
Loans and receivables | 32 | 31
Bank accounts pledged as security [member] |  |
Disclosure of financial assets [Line Items] |  |
Loans and receivables | $ 42 | $ 38

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- Definition The amount of non-derivative financial assets that are designated as available for sale or are not classified as (a) loans and receivables; (b) held-to-maturity investments; or (c) financial assets at fair value through profit or loss. [Refer: Derivative financial assets; Financial assets at fair value through profit or loss; Held-to-maturity investments] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 8 -Subparagraph d -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_8_d&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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- Definition The amount of non-derivative financial assets with fixed or determinable payments that are not quoted in an active market, other than: (a) those that the entity intends to sell immediately or in the near term, which shall be classified as held for trading, and those that the entity, upon initial recognition, designates as at fair value through profit or loss; (b) those that the entity, upon initial recognition, designates as available for sale; or (c) those for which the holder may not recover substantially all of its initial investment, other than because of credit deterioration, which shall be classified as available for sale. An interest acquired in a pool of assets that are not loans or receivables (for example, an interest in a mutual fund or a similar fund) is not a loan or receivable. [Refer: Derivative financial assets] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2018-01-01 -Name IFRS -Number 7 -IssueDate 2017-01-01 -Paragraph 8 -Subparagraph c -URI http://eifrs.ifrs.org/eifrs/XBRL?type=IFRS&num=7&date=2017-03-02&anchor=para_8_c&doctype=Standard&book=B -URIDate 2017-03-09 + Details
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