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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Disclosure of Cash Flow Statement [Abstract]
Amounts receivable	$ (13.6)	$ (8.8)
Inventory net realizable value adjustment	(26.0)	(55.2)
Advances and prepaid expenses	(0.6)	2.3
Accounts payable and accrued liabilities	2.3	(0.1)
Income taxes (paid) refunded	(8.3)	(1.3)
Increase (decrease) in working capital	$ (46.2)	$ (63.1)

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Adjustments for Accounts Payable and Accrued Liabilities1

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Adjustments for Advances and Prepaid Expense

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Disclosure of Cash Flow Statement [Abstract]

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- Definition

Adjustments for decrease (increase) in inventories to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Inventories; Profit (loss)]

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Adjustments for decrease (increase) in trade accounts receivable to reconcile profit (loss) to net cash flow from (used in) operating activities. [Refer: Profit (loss)]

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The cash flows from income taxes paid or refunded.

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The increase (decrease) in working capital.

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