OTHER EXPENSES (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2023	Dec. 31, 2022
Analysis of income and expense [abstract]
Changes in asset retirement obligations at closed mines	$ 9.7	$ 1.6
Write-down of assets	1.3	0.6
Forfeiture of carbon fines	13.5	0.0
Settlement of carbon fines	15.0	0.0
Other	10.0	6.9
Other expenses	$ 49.5	$ 9.1

The amount of expenses that the entity does not separately disclose in the same statement or note when the entity uses the 'nature of expense' form for its analysis of expenses. [Refer: Expenses, by nature]

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