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Impairment reversal (impairment and disposals) of non-current assets (Details Narrative) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
IfrsStatementLineItems [Line Items]
Working capital adjustments	$ 9
Impairment loss	882
Midwestern System [Member]
IfrsStatementLineItems [Line Items]
Gains (losses) recognised when control of subsidiary is lost	1,121
Reversal impairment of property plant and equipment	214
Impairment of property plant and equipment	916
Working capital adjustments	9
Manganese [Member]
IfrsStatementLineItems [Line Items]
Impairment loss	$ 10	$ 35	$ 76
Resources [Member]
IfrsStatementLineItems [Line Items]
Impairment loss		$ 98	882
Bio Fuels [Member]
IfrsStatementLineItems [Line Items]
Impairment loss			$ 125

X

- Definition

Adjustments, other than changes in working capital, to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)]

+ References

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- Definition

The gains (losses) recognised in association with the loss of control over a subsidiary, which are attributable to the former controlling interest.

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The amount recognised as a reduction of the carrying amount of an asset or cash-generating unit to its recoverable amount. [Refer: Carrying amount [member]]

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The amount of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Impairment loss recognised in profit or loss; Property, plant and equipment]

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The amount of reversal of impairment loss recognised in profit or loss for property, plant and equipment. [Refer: Reversal of impairment loss recognised in profit or loss; Property, plant and equipment]

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