Share-based payments - Summary of Cost Related to Share-Based Payment Transactions (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Statement [Line Items]
Equity-settled	$ 44	$ 39	$ 30
Total	46	41	32
Operating profit [Member]
Statement [Line Items]
Equity-settled	28	26	19
Cash-settled	2	2	2
System Fund [member]
Statement [Line Items]
Equity-settled	$ 16	$ 13	$ 11

The amount of expense arising from cash-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions]

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The amount of expense arising from equity-settled share-based payment transactions in which the goods or services received did not qualify for recognition as assets. [Refer: Expense from share-based payment transactions]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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The amount of expense arising from share-based payment transactions in which the goods or services received did not qualify for recognition as assets.

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