Derivative financial instruments - Summary of carrying amount of fair value hedges (Details) - Fair value hedges - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022
Disclosure of detailed information about hedges [line items]
Hedges, Fair value asset	$ 119	$ 0
Hedging instrument, liabilities	2,106	3,674
Interest rate risk on finance debt
Disclosure of detailed information about hedges [line items]
Hedges, Fair value asset	0	0
Hedging instrument, liabilities	4	4
Notional amount	387	368
Interest rate and foreign currency risk on finance debt
Disclosure of detailed information about hedges [line items]
Hedges, Fair value asset	119	0
Hedging instrument, liabilities	2,102	3,670
Notional amount	$ 16,862	$ 17,032

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No definition available.

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- Definition

The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2023-01-01
-Paragraph 24A
-Subparagraph a
-URI https://taxonomy.ifrs.org/xifrs-link?type=IFRS&num=7&code=ifrs-tx-2023-en-r&anchor=para_24A_a&doctype=Standard
-URIDate 2023-03-23

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- Definition

The amount of a hedging instrument, recognised as a liability. [Refer: Hedging instruments [member]]

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- Definition

The nominal or face amount of a financial instrument, used to calculate payments made on that instrument.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Name IAS
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-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

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