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Financial instruments - Summary of changes in fair value of Level 3 financial assets and financial liabilities (Detail) $ in Millions	6 Months Ended
	Jun. 30, 2022 USD ($)
Disclosure of detailed information about financial instruments [line items]
Currency translation adjustments	$ (587)
Level 3
Disclosure of detailed information about financial instruments [line items]
Opening balance	177
Currency translation adjustments	(8)
Total realised gains/(losses) included in consolidated sales revenue	11
Total realised gains/(losses) included in net operating costs	(31)
Total unrealised gains included in net operating costs	32
Total unrealised losses transferred into other comprehensive income through cash flow hedges	(60)
Additions to financial instruments	36
Disposals/maturity of financial instruments	29
Closing balance	186
Net gains included in the income statement for assets and liabilities held at period end	$ 20

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The increase in the fair value measurement of assets resulting from purchases of those assets. [Refer: At fair value [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 13
-IssueDate 2021-01-01
-Paragraph 93
-Subparagraph e
-Clause iii
-URI http://eifrs.ifrs.org/eifrs/xifrs-link?type=IFRS&num=13&code=ifrs-tx-2021-en-r&anchor=para_93_e_iii&doctype=Standard
-URIDate 2021-03-24

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Adjustment on currency translation.

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- Definition

Disposal or maturity of financial instruments.

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- Definition

Financial assets and financial liabilities at fair value.

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- Definition

Gains (losses) recognised in profit or loss for assets and liabilities held.

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- Definition

Total realised gains or losses related to Level 3 financial assets and liabilities included in consolidated sales revenue.

+ References

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- Definition

Total realised gains or losses related to Level 3 financial assets and liabilities included in net operating costs.

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Unrealised gain or loss transferred into other comprehensive income.

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- Definition

Total unrealised gains related to Level 3 financial assets and liabilities included in net operating costs.

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