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Earnings for the year - Additional Information (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Commodity price risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	$ 557	$ 431
Percentage of increase in commodity price	10.00%
Impact of hedging instrument, liabilities carrying value	$ 219
Percentage of decrease in commodity price	10.00%
Foreign exchange risk [member]
Disclosure of detailed information about hedging instruments [line items]
Hedging instrument, assets	$ 17	$ 10
Foreign exchange risk [member] | Australia [member]
Disclosure of detailed information about hedging instruments [line items]
Percentage of increase in the exchange rate	12.00%	12.00%
Percentage of decrease in the exchange rate	(12.00%)	(12.00%)

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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

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- Definition

The amount of a hedging instrument, recognised as an asset. [Refer: Hedging instruments [member]]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IFRS
-Number 7
-IssueDate 2022-03-24
-Paragraph 24A
-Subparagraph a
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-URIDate 2022-03-24

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