Related Party Transactions - Summary of Key Management Remuneration (Detail) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Related party transactions [abstract]
Short-term benefits	$ 10	$ 9	$ 9
Post-employment benefits	1	1	1
Share-based payments - calculated in accordance with the principles disclosed in note 8	8	6	6
Total	$ 19	$ 16	$ 16

The amount of compensation to key management personnel. [Refer: Key management personnel of entity or parent [member]]

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The amount of compensation to key management personnel in the form of post-employment benefits. [Refer: Key management personnel of entity or parent [member]]

+ References

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The amount of compensation to key management personnel in the form of share-based payments. [Refer: Key management personnel of entity or parent [member]]

+ References

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The amount of compensation to key management personnel in the form of short-term employee benefits. [Refer: Key management personnel of entity or parent [member]]

+ References

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