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Contingencies and guarantees - Additional Information (Detail) | 12 Months Ended
--- | ---
Dec. 31, 2019 USD ($) Lawsuits | Dec. 31, 2018 USD ($) | Dec. 31, 2016 USD ($)
Disclosure of contingent liabilities [line items] |  |  |
Outstanding letters of credit | $ 33,000,000 | $ 29,000,000 |
Guarantees of loans made to equity accounted investments | 55,000,000 | 43,000,000 |
Other contingent liabilities | 0 | 0 |
Security Incidents [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Provision |  | $ 0 | $ 5,000,000
Litigation settlement amount | $ 3,000,000 |  |
Number of lawsuits filed againsts group | Lawsuits | 4 |  |
Security Incidents [member] | One of the Four Lawsuits [Member] | Maximum [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Litigation settlement amount | $ 2,000,000 |  |
Americas security incident [member] |  |  |
Disclosure of contingent liabilities [line items] |  |  |
Number of managed properties affected by security incident |  |  | 12

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table. + References No definition available. + Details
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- Definition The amount recognised for new other provisions. [Refer: Other provisions] + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 37 -IssueDate 2019-01-01 -Paragraph 84 -Subparagraph b -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IAS&num=37&code=ifrs-tx-2019-en-r&anchor=para_84_b&doctype=Standard -URIDate 2019-03-27 + Details
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- Definition The amount of guarantees of loans made to equity accounted investments. + References No definition available. + Details
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- Definition The total amount of the contingent obligation under letters of credit outstanding as of the reporting date. + References No definition available. + Details
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- Definition Number of lawsuits filed. + References No definition available. + Details
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- Definition Number of managed properties affected by security incident. + References No definition available. + Details
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- Details
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- Details
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