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Impairment and onerous contracts - Ferrous Minerals (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Impairment and onerous contracts
Impairment and disposal of non-current assets	$ 432	$ 403	$ 593	$ 432

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- References

No definition available.

+ Details

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- Definition

The amount of impairment loss or reversal of impairment loss recognised in profit or loss. [Refer: Impairment loss recognised in profit or loss; Reversal of impairment loss recognised in profit or loss]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-URIDate 2020-01-01

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