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Inventories - Inventories (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Inventory Disclosure [Abstract]
Inventories	$ 333.3	$ 324.0
Inventory [Line Items]
Inventory, Finished Goods, Net of Reserves	175.3	171.9
Inventory, Supplies, Net of Reserves	122.4	111.7
Inventories	333.3	324.0
Inventory Pulp
Inventory [Line Items]
Inventory, Raw Materials, Net of Reserves	14.8	16.8
Inventories
Inventory [Line Items]
Inventory, Raw Materials, Net of Reserves	$ 20.9	$ 23.6

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Carrying amount, net of valuation reserves and adjustments, as of the balance sheet date of merchandise or goods held by the company that are readily available for sale.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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