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Financial Instruments and Risk Management (Credit Risk) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	$ 129.8	$ 172.5	$ 220.5
Other receivables		4.0
Total financial instrument exposure to credit risk	153.5	176.5
Cash and cash equivalents
Disclosure of detailed information about financial instruments [line items]
Cash and cash equivalents	129.8	172.5
Trade receivables
Disclosure of detailed information about financial instruments [line items]
Other receivables	$ 4.6	$ 4.0

X

- Definition

The amount of cash on hand and demand deposits, along with short-term, highly liquid investments that are readily convertible to known amounts of cash and that are subject to an insignificant risk of changes in value. [Refer: Cash; Cash equivalents]

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- Definition

Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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- Definition

The amount that best represents the maximum exposure to credit risk without taking into account any collateral held or other credit enhancements (for example, netting agreements that do not qualify for offset in accordance with IAS 32). [Refer: Credit risk [member]]

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- Definition

The amount of current other receivables. [Refer: Other receivables]

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