Non-Controlling Interest (Tables)

12 Months Ended

Dec. 31, 2025

Non Controlling Interest [Abstract]

Disclosure of summarized balance sheet information related to non-controlling interest [Table Text Block]

		December 31, 2024
Assets
Cash and cash equivalents	$	12.9
Trade and other receivables		44.1
Inventories - current		37.5
Property, plant and equipment		902.9
Other assets		11.1
		1,008.5
Liabilities
Trade and other payables		37.5
Amounts due to related parties		422.6
Environmental and other provisions		35.5
Lease liabilities		20.1
Deferred tax liabilities		119.9
Other liabilities		68.9
		704.5

Disclosure of summarized income statement and comprehensive income information related to non-controlling interest [Table Text Block]

		Year ended December 31, 2025¹			Year ended December 31, 2024
Total revenue	$	76.5		$	274.1
Mine operating costs		56.5			210.8
Depreciation and amortization		16.5			50.1
Gross profit		3.5			13.2

Other expenses		2.6			20.2
Finance expense - related parties		14.4			31.3
Other net finance costs		5.3			16.6
Tax recovery		(2.0	)		(19.4	)
Net loss for the year	$	(16.8	)	$	(35.5	)

Total comprehensive loss	$	(4.0	)	$	(63.1	)