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Summary of Significant Accounting Policies (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2023 | Dec. 31, 2022 | Dec. 31, 2021
Accounting Policies [Abstract] |  |  |
Accounts Receivable, before Allowance for Credit Loss | $ 173.8 | $ 167.6 |
Accounts Receivable, Allowance for Credit Loss, Current | (1.5) | (1.4) |
Unbilled Receivables, Current | 4.1 | 9.1 |
Income Taxes Receivable, Current | 4.8 | 10.6 |
Other Receivables, Net, Current | 3.1 | 2.9 |
Receivables, net of allowance for current expected credit losses of $1.5 and $1.4 at December 31, 2023 and 2022 | 184.5 | 188.8 |
Inventory, Finished Goods, Gross | 156.8 | 171.9 |
Other Inventory, Supplies, Gross | 124.1 | 111.7 |
Depreciation and amortization | 98.6 | 103.3 | $ 105.0
Asset Retirement Obligation | 2.0 | 1.9 | 2.0
Accretion Expense, Including Asset Retirement Obligations | 0.1 | 0.0 |
Increase (Decrease) in Asset Retirement Obligations | 0.0 | 0.0 | $ (1.8)
Asset Retirement Obligation, Cash Paid to Settle | $ (0.1) | $ (0.1) |

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