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Trade and other receivables - Summary of Maximum Exposure to Credit Risk for Trade and Other Receivables Excluding Prepayments by Geographic Region (Detail) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
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Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | $ 438 | $ 552
Americas [member] |  |
Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | 212 | 359
EMEAA [member] |  |
Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | 183 | 141
Greater China [member] |  |
Disclosure of trade and other receivables [line items] |  |
Maximum exposure to credit risk | $ 43 | $ 52

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- Definition The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]] + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 35K -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2020-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2020-01-01 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2021-01-01 -Name IFRS -Number 7 -IssueDate 2020-01-01 -Paragraph 36 -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2017-en-b&anchor=para_36_a&doctype=Standard&book=b -URIDate 2020-01-01 + Details
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- Definition Disclosure of trade and other receivables. + References No definition available. + Details
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- Details
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- Details
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- Details
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