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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounting Policies [Abstract]
Accounts Receivable, before Allowance for Credit Loss	$ 167.6	$ 154.1
Accounts Receivable, Allowance for Credit Loss, Current	(1.4)	(1.4)
Unbilled Receivables, Current	9.1	7.2
Income Taxes Receivable, Current	10.6	6.1
Other Receivables, Net, Current	2.9	1.4
Receivables, net of allowance for current expected credit losses of $1.4 at December 31, 2022 and 2021	188.8	167.4
Inventory, Finished Goods, Gross	171.9	148.0
Other Inventory, Supplies, Gross	111.7	100.1
Depreciation and amortization	103.3	105.0	$ 111.0
Asset Retirement Obligation	1.9	2.0	3.8
Accretion Expense, Including Asset Retirement Obligations	0.0	0.1
Increase (Decrease) in Asset Retirement Obligations	0.0	(1.8)	$ 2.5
Asset Retirement Obligation, Cash Paid to Settle	$ (0.1)	$ (0.1)

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Amount, before allowance for credit loss, of right to consideration from customer for product sold and service rendered in normal course of business.

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Amount of accretion expense, which includes, but is not limited to, accretion expense from asset retirement obligations, environmental remediation obligations, and other contingencies.

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