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Income Taxes - Summary of Detail Information of Income Tax Recognized in Other Comprehensive Income (Detail) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Major components of tax expense (income) [abstract]
Re-measurements of post-employment benefits	$ (123)	$ 58	$ 19
Exchange differences, cash flow and net investment hedges	(45)	304	88
Income tax (losses)/gains	$ (167)	$ 361	$ 107

X

- Definition

Other comprehensive income cash flow and net investment hedges.

+ References

No definition available.

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X

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 12
-IssueDate 2021-01-01
-Paragraph 81
-Subparagraph ab
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-URIDate 2021-03-24

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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 [member]]

+ References

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- References

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