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Supplemental Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021
Supplemental Cash Flow Elements [Abstract]
Cash paid during the period for income taxes	$ 1.6	$ 2.4
Cash paid for interest	0.0	2.1
Cash received for income tax receivables	0.0	89.9
Establishment of operating lease right-of-use assets and lease liabilities
Operating lease right-of-use assets	46.1	40.5
Operating lease liabilities	46.1	46.8
Tenant improvement allowance not yet received	17.8	0.0
Purchases of property, plant and equipment in accounts payable and accrued liabilities	$ 4.3	$ 0.0

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Operating Lease Liability Established

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Tenant Improvement Allowance Not Yet Received

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income.

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Amount of cash paid for interest, excluding capitalized interest, classified as operating activity. Includes, but is not limited to, payment to settle zero-coupon bond for accreted interest of debt discount and debt instrument with insignificant coupon interest rate in relation to effective interest rate of borrowing attributable to accreted interest of debt discount.

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The amount of cash received during the period as refunds for the overpayment of taxes.

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Amount of increase in right-of-use asset obtained in exchange for operating lease liability.

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