Revenue Recognition (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Balances previously classified as contract liabilities in prior periods that were recognized as revenues	$ 14.6	$ 2.6	$ 2.6
Revenue recognized as result of contract modification	$ 3.4
5.875% Alkali senior secured notes due 2042 \| Senior Notes [Member]
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Debt interest rate	5.875%
Long-Term Debt, Maturity, Year Five	$ 16.9
Long-Term Debt, Maturity, Year One	13.1
Long-Term Debt, Maturity, Year Two	14.2
Long-Term Debt, Maturity, Year Three	14.6
Long-Term Debt, Maturity, Year Four	$ 15.7

Amount of increase (decrease) in revenue recognized for cumulative catch-up adjustment from contract modification which increases (decreases) right to consideration in exchange for good or service transferred to customer when right is conditioned on something other than passage of time.

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Amount of revenue recognized that was previously included in balance of obligation to transfer good or service to customer for which consideration from customer has been received or is due.

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-Topic 606
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Amount of long-term debt payable, sinking fund requirement, and other securities issued that are redeemable by holder at fixed or determinable price and date, maturing in next fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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