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Taxation - Summary of tax relating to components of other comprehensive income or loss (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Tax on fair value movements:
Tax (charge)/credit on fair value movements	$ (10)	$ 1	$ 21
Tax (charge)/credit on remeasurement gains/(losses) on pension and post-retirement healthcare plans	(22)	152	(123)
Deferred tax relating to components of other comprehensive income for the year (note 15)	$ (32)	$ 153	$ (102)

X

- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to cash flow hedges. [Refer: Cash flow hedges [member]; Other comprehensive income]

+ References

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X

- Definition

The amount of income tax relating to amounts recognised in other comprehensive income. [Refer: Other comprehensive income]

+ References

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- Definition

The amount of income tax relating to amounts recognised in other comprehensive income in relation to remeasurements of defined benefit plans. [Refer: Other comprehensive income; Reserve of remeasurements of defined benefit plans; Defined benefit plans [domain]]

+ References

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- Definition

Tax On Fair Value Movements

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No definition available.

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