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Risks Arising from Financial Instruments - Summary of Carrying Amount of Financial Assets (Detail) - USD ($) $ in Millions | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Disclosure of credit risk exposure [line items] |  |
Gross | $ 18,258 | $ 21,598
Debt Securities [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 396 | 418
Trade receivables [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 3,465 | 3,285
Cash Deposits for Guarantees [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 168 | 184
Loans to customers [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 117 | 142
Other receivables [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 1,207 | 1,237
Derivatives [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 669 | 965
Cash and Cash Equivalent [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 12,097 | 15,252
Equity instruments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 139 | 115
Gross carrying amount [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 18,660 | 21,974
Gross carrying amount [member] | Debt Securities [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 396 | 418
Gross carrying amount [member] | Trade receivables [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 3,796 | 3,593
Gross carrying amount [member] | Cash Deposits for Guarantees [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 168 | 184
Gross carrying amount [member] | Loans to customers [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 117 | 142
Gross carrying amount [member] | Other receivables [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 1,272 | 1,299
Gross carrying amount [member] | Derivatives [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 669 | 965
Gross carrying amount [member] | Cash and Cash Equivalent [Member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 12,097 | 15,252
Gross carrying amount [member] | Equity instruments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | 145 | 121
Impairment losses [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | (402) | (376)
Impairment losses [member] | Trade receivables [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | (331) | (308)
Impairment losses [member] | Other receivables [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | (65) | (62)
Impairment losses [member] | Equity instruments [member] |  |
Disclosure of credit risk exposure [line items] |  |
Gross | $ (6) | $ (6)

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- Definition Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table. + References No definition available. + Details
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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 2021-01-01 -Paragraph 35K -Subparagraph a -URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2021-en-r&anchor=para_35K_a&doctype=Standard -URIDate 2021-03-24 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Note Expiry date 2023-01-01 -Name IFRS -Number 7 -IssueDate 2021-01-01 -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 2021-03-24 + Details
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