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OTHER EXPENSES (Tables)

12 Months Ended

Dec. 31, 2023

Analysis of income and expense [abstract]

Disclosure of other expenses (income)

									Years ended December 31,
			Notes									2023			2022
Changes in asset retirement obligations at closed mines			15(a)									$	9.7		$	1.6
Write-down of assets												1.3			0.6
Forfeiture of carbon fines			15(b)									13.5			—
Settlement of carbon fines			15(b)									15.0			—
Other												10.0			6.9
												$	49.5		$	9.1

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