Capital - Summary of Dividend Declared and Paid (Detail) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Disclosure Of Dividends Declared And Paid [Abstract]
Dividends declared per common share	$ 0.655	$ 0.595	$ 1.31	$ 1.19
Dividends declared	$ 284	$ 269	$ 576	$ 536
Dividends reinvested	(9)	(9)	(21)	(17)
Dividends paid	$ 275	$ 260	$ 555	$ 519

The amount of dividends paid by the entity on ordinary shares. [Refer: Ordinary shares [member]]

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 34
-IssueDate 2025-01-01
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-URIDate 2025-03-27

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
-Paragraph 246
-Subparagraph f
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Reference 3: http://www.xbrl.org/2003/role/disclosureRef
-Note Effective 2027-01-01
-Name IFRS
-Number 19
-IssueDate 2025-01-01
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-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=19&code=ifrs-tx-2025-en-r&anchor=para_246_f&doctype=Standard
-URIDate 2025-03-27

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