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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Disclosure of Cash Flow Statement [Abstract]
Amounts receivable	$ 3.3	$ (0.4)
Inventory	(13.3)	(11.4)
Advances and prepaid expenses	(3.8)	(2.8)
Accounts payable and accrued liabilities	3.9	(14.0)
Income taxes (paid) refunded	(4.6)	(4.1)
Increase (decrease) in working capital	$ (14.5)	$ (32.7)

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- Definition

Adjustments for Accounts Payable and Accrued Liabilities1

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Adjustments for Advances and Prepaid Expense

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- Definition

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)]

+ References

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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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