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Auditor's remuneration paid to Pricewaterhouse Coopers LLP - Summary of Auditor's Remuneration Paid (Detail) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Auditors Remuneration [Line Items] |  |  |  |
Audit of the Financial Statements |  | $ 7 | $ 7 | $ 6
Audit of subsidiaries |  | 3 | 3 | 2
Other assurance services | [1] | 1 | 1 | 1
Total expense related to remuneration |  | 11 | 11 | 9
SEC Regulations [Member] |  |  |  |
Auditors Remuneration [Line Items] |  |  |  |
Audit of the Financial Statements |  | 10 | 10 | 8
Other audit-related |  | 1 | 1 | 1
Total expense related to remuneration |  | $ 11 | $ 11 | $ 9
[1] | Other assurance services consists of IT assurance and audit of System Fund financial information.

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- Definition The amount of fees paid or payable to the entity's auditors. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Definition The amount of fees paid or payable to the entity's auditors for auditing services. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Name IAS -Number 1 -IssueDate 2024-01-01 -Paragraph 112 -Subparagraph c -URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2024-en-r&anchor=para_112_c&doctype=Standard -URIDate 2024-03-27 + Details
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- Details
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