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Risks Arising from Financial Instruments - Analysis of Financial Instruments (Detail) - USD ($) $ in Millions	Jun. 30, 2026	Dec. 31, 2025
Disclosure of detailed information about financial instruments [line items]
Financial Assets	$ 15,613	$ 18,239
Financial Liabilities	98,204	101,013
Quoted (unadjusted) prices- level 1 [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	41	31
Financial Liabilities	43	64
Quoted (unadjusted) prices- level 1 [member] | Derivative liabilities [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	43	64
Quoted (unadjusted) prices- level 1 [member] | Derivatives [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	41	31
Observable market inputs - level 2 [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	901	696
Financial Liabilities	4,369	6,333
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Financial liabilities at fair value through profit or loss, category [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	3,390	5,609
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	467	396
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Fair value hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	114	102
Observable market inputs - level 2 [member] | Derivative liabilities [member] | Net investment hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	399	227
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	54	36
Observable market inputs - level 2 [member] | Derivatives [member] | Cash flow hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	429	454
Observable market inputs - level 2 [member] | Derivatives [member] | Net investment hedges [member]
Disclosure of detailed information about financial instruments [line items]
Financial Assets	417	207
Unobservable market inputs - level 3 [member]
Disclosure of detailed information about financial instruments [line items]
Financial Liabilities	556	241
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	$ 556	$ 241

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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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