Finance costs and unwinding of obligations (Details) - USD ($) $ in Millions	6 Months Ended	12 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023
Disclosure of finance costs and unwinding of obligations [Abstract]
Finance costs - borrowings	$ 65	$ 58
Finance costs - leases	6	5	$ 12
Unwinding of obligations	13	12
Finance costs and unwinding of obligations	$ 84	$ 75

Disclosure of finance costs and unwinding of obligations [Abstract]

No definition available.

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- Definition

Finance Costs and Unwinding of Obligations

+ References

No definition available.

+ Details

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- Definition

Finance, Fee Amortisation, Interest And Other Costs

+ References

No definition available.

+ Details

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- Definition

The amount of expense recognised due to the unwinding of the discount on provisions other than provisions for employee benefits, resulting from the effect of the passage of time. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
-Number 1
-IssueDate 2023-01-01
-Paragraph 112
-Subparagraph c
-URI https://taxonomy.ifrs.org/xifrs-link?type=IAS&num=1&code=ifrs-tx-2023-en-r&anchor=para_112_c&doctype=Standard
-URIDate 2023-03-23

+ Details

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- Definition

The amount of interest expense on lease liabilities. [Refer: Lease liabilities]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 16
-IssueDate 2023-01-01
-Paragraph 53
-Subparagraph b
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=16&code=ifrs-tx-2023-en-r&anchor=para_53_b&doctype=Standard
-URIDate 2023-03-23

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