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Leases - Summary of capitalised finance leases (Detail) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023
Disclosure Of Maturity Analysis Of Finance Lease Payments Payable [Line Items]
Total undiscounted cash payments expected to be made	$ 1,743	$ 1,686
Effect of discounting	(330)	(335)
Present value of minimum lease payments	1,413	1,351
Comprising:
Current lease liabilities per the balance sheet	354	345
Non-current lease liabilities per the balance sheet	1,059	1,006
Total lease liabilities	1,413	1,351
Due within 1 year
Disclosure Of Maturity Analysis Of Finance Lease Payments Payable [Line Items]
Total undiscounted cash payments expected to be made	398	385
Between 1 and 3 years
Disclosure Of Maturity Analysis Of Finance Lease Payments Payable [Line Items]
Total undiscounted cash payments expected to be made	513	457
Between 3 and 5 years
Disclosure Of Maturity Analysis Of Finance Lease Payments Payable [Line Items]
Total undiscounted cash payments expected to be made	281	270
More than 5 years
Disclosure Of Maturity Analysis Of Finance Lease Payments Payable [Line Items]
Total undiscounted cash payments expected to be made	$ 551	$ 574

X

- Definition

The amount of current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph b
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-URIDate 2024-03-27

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X

- Definition

The amount of the discounted unguaranteed residual value of assets subject to finance leases. Unguaranteed residual value is the portion of the residual value of the underlying asset, the realisation of which by a lessor is not assured or is guaranteed solely by a party related to the lessor. Finance lease is a lease that transfers substantially all the risks and rewards incidental to ownership of an underlying asset.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2024-01-01
-Paragraph 94
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_94&doctype=Standard
-URIDate 2024-03-27

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X

- Definition

The amount of liabilities related to the entity's leases. Lease is a contract, or part of a contract, that conveys the right to use an underlying asset for a period of time in exchange for consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 16
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph b
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-URIDate 2024-03-27

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X

- Definition

The amount of non-current lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Number 16
-IssueDate 2024-01-01
-Paragraph 47
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2024-en-r&anchor=para_47_b&doctype=Standard
-URIDate 2024-03-27

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- Definition

Disclosure Of Maturity Analysis Of Finance Lease Payments Payable [Line Items]

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- Definition

Finance Lease Obligations

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- Definition

Minimum finance lease payments payable, at present value

+ References

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