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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Disclosure of Cash Flow Statement [Abstract]
Amounts receivable	$ 2.0	$ 3.3
Inventory	(49.7)	(13.3)
Advances and prepaid expenses	3.5	(3.8)
Accounts payable and accrued liabilities	16.7	3.9
Income taxes (paid) refunded	(26.9)	(4.6)
Increase (decrease) in working capital	$ (54.4)	$ (14.5)

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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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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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