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PROVISIONS - Asset Retirement Obligations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Reconciliation of changes in other provisions [abstract]
Less: current portion	$ (14.5)	$ (5.4)
Non-current portion	285.1	360.1
Asset retirement obligations
Reconciliation of changes in other provisions [abstract]
Balance, beginning of the year	347.4	298.5
Capitalized in property, plant and equipment	(21.4)	36.2
Changes in asset retirement obligations at closed mines	(13.4)	9.7
Impairment reversal	(35.8)	0.0
Accretion expense	5.7	5.0
Disbursements	(2.9)	(2.0)
Balance, end of the year	279.6	347.4
Less: current portion	(14.5)	(5.4)
Non-current portion	$ 265.1	$ 342.0

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- Definition

Asset Retirement Obligations

+ References

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- Definition

Increase (Decrease) Through Change In Discount Rate, Other Provisions, Change In Asset Retirement Obligations

+ References

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- Definition

Increase (Decrease) Through Change In Discount Rate, Other Provisions, Impairment Reversal

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- Definition

Increase (Decrease) Through Change In Discount Rate, Other Provisions, Property, Plant And Equipment

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- Definition

The increase in other provisions through adjustments arising from the passage of time. [Refer: Other provisions]

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Name IAS
-Number 37
-IssueDate 2024-01-01
-Paragraph 84
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-URIDate 2024-03-27

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- Definition

The increase (decrease) in other provisions resulting from transfers and changes that the entity does not separately disclose in the same statement or note. [Refer: Other provisions]

+ References

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- Definition

The amount of non-current provisions other than provisions for employee benefits. [Refer: Non-current provisions]

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-Number 1
-IssueDate 2024-01-01
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- Definition

The amount of current provisions other than provisions for employee benefits. [Refer: Provisions]

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