The amount of outstanding funds that the entity is obligated to repay.

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The interest rate on borrowings. [Refer: Borrowings]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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The basis (reference rate) used for calculation of the interest rate on borrowings. [Refer: Borrowings]

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The maturity of borrowings. [Refer: Borrowings]

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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: Financial instruments, class [member]; Financial assets; Derivatives [member]]

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The fair value of financial liabilities. [Refer: At fair value [member]; Financial liabilities]

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The gain (loss) on the change in fair value of the hedged item used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
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The gain (loss) on the change in fair value of the hedging instrument used as a basis for recognising hedge ineffectiveness. Hedge ineffectiveness is the extent to which the changes in the fair value or the cash flows of the hedging instrument are greater or less than those on the hedged item.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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- Definition

The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings]

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-Number 7
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Current Line Of Credit Facility.

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No definition available.

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Interest bearing liabilities and financing facilities.

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No definition available.

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Loan facilities amount.

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No definition available.

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Number of borrowing facilities.

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No definition available.

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Number of notes issued.

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No definition available.

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Receivables Percentage In Favour Of Lenders.

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Reserve Amount For Receivables Of Lenders.

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No definition available.

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Interest Bearing Liabilities and Financing Facilities - Additional Information (Detail) SFr in Millions, $ in Millions				1 Months Ended	12 Months Ended
	Jan. 17, 2020 USD ($)	Aug. 28, 2015 USD ($) Note	Jun. 24, 2008 USD ($)	Jul. 31, 2023 USD ($)	Dec. 31, 2023 USD ($) Loan	Dec. 31, 2022 USD ($) Loan	Dec. 31, 2021 USD ($)	Dec. 31, 2013 USD ($)	Dec. 31, 2023 CHF (SFr) Loan	Oct. 31, 2023 USD ($)
Interest bearing liabilities and financing facilities [line items]
Borrowings					$ 4,874	$ 5,138	$ 5,430
Borrowings repaid					284	283	784
Liquidity Facilities [Member]
Interest bearing liabilities and financing facilities [line items]
Borrowings										$ 1,800
Syndicated facility [member] \| Tranche one [Member]
Interest bearing liabilities and financing facilities [line items]
Borrowings						$ 800
Borrowings maturity						October 2024
Syndicated facility [member] \| Tranche two [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings						$ 600
Borrowings maturity						July 2025
Syndicated facility [member] \| Tranche three [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings						$ 600
Borrowings maturity						July 2027
JBIC facility [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings						$ 83	166
Borrowings repaid					$ 83	$ 83
Receivables percentage in favour of lenders			90.00%
Reserve amount for receivables of lenders			$ 30
JBIC facility [member] \| Loan commitments [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings repaid				$ 83
JBIC facility [member] \| Tranche one [Member] \| Loan commitments [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings			$ 1,000
Borrowings interest rate basis			Interest is payable semi-annually in arrears and the principal amortises on a straight-line basis, with equal instalments of principal due on each interest payment date (every six months).
JBIC facility [member] \| Tranche two [member] \| Loan commitments [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings			$ 500
Borrowings repaid								$ 500
Bilateral facilities [member]
Interest bearing liabilities and financing facilities [line items]
Number of borrowing facilities \| Loan					15	14			15
Loan facilities amount					$ 2,250	$ 2,050
Bilateral facilities [member] \| Tranche one [Member]
Interest bearing liabilities and financing facilities [line items]
Number of borrowing facilities \| Loan					1				1
Bilateral facilities [member] \| Tranche two [member]
Interest bearing liabilities and financing facilities [line items]
Number of borrowing facilities \| Loan					5				5
Bilateral facilities [member] \| Tranche three [member]
Interest bearing liabilities and financing facilities [line items]
Number of borrowing facilities \| Loan					4				4
New syndicated facility [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings	$ 600
Borrowings maturity	seven years
Borrowings interest rate	1.20%
Borrowings interest rate basis	SOFR
Unsecured bonds [member]
Interest bearing liabilities and financing facilities [line items]
Financial liabilities carrying amount					$ 4,087	4,084
Financial liabilities at fair value					3,936	3,852
Medium Term Notes [member]
Interest bearing liabilities and financing facilities [line items]
Financial liabilities carrying amount					200	385			SFr 175
Financial liabilities at fair value					188	372
Borrowings					200	385	592
Borrowings repaid					201	200
Global medium term notes [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings		$ 3,000
Borrowings repaid					201
Number of notes issued \| Note		1
US Bonds [member]
Interest bearing liabilities and financing facilities [line items]
Borrowings					4,087	4,084	$ 4,081
Borrowings interest rate basis		Interest on the bonds is payable semi-annually in arrears
Borrowings [member] \| Syndicated facility [member]
Interest bearing liabilities and financing facilities [line items]
Current line of credit facility						2,000
Fair value hedges [member]
Interest bearing liabilities and financing facilities [line items]
Gain on changes in fair value risks of the hedged item					16	7
Loss on changes in fair value risks of the hedged instrument					$ 6	$ 7