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Risks Arising from Financial Instruments - Analysis of Financial Instruments (Detail) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Disclosure of detailed information about financial instruments [line items]
Financial Assets	$ 18,239	$ 17,092
Financial Liabilities	101,013	98,379
Quoted (unadjusted) prices- level 1 [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	31	27
Financial Liabilities	64	29
Quoted (unadjusted) prices- level 1 [member] | Derivative liabilities [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	64	29
Quoted (unadjusted) prices- level 1 [member] | Derivatives [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	31	27
Observable market inputs - level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	696	796
Financial Liabilities	6,333	5,857
Observable market inputs - level 2 [member] | Derivative liabilities [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	5,609	5,644
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	396	105
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Fair value hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	102	94
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Net investment hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	227	14
Observable market inputs - level 2 [member] | Non derivative financial assets [member] | Held for trading (non-derivatives) [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets		9
Observable market inputs - level 2 [member] | Derivatives [member] | Financial assets at fair value through profit or loss, category [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	36	26
Observable market inputs - level 2 [member] | Derivatives [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	454	416
Observable market inputs - level 2 [member] | Derivatives [member] | Net investment hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	207	345
Unobservable market inputs - level 3 [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	241	288
Unobservable market inputs - level 3 [member] | Derivative liabilities [member] | Deferred consideration on acquisitions [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	$ 241	$ 288

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Classes of financial instruments [domain]; Financial liabilities]

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The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Classes of financial instruments [domain]; Financial assets; Derivatives [member]]

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