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Transactions With Related Party (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Variable Interest Entity, Not Primary Beneficiary [Member]
Related Party Transaction [Line Items]
Revenue from related party	$ 3.4	$ 3.6	$ 10.6	$ 10.2
Cost of sales from related party	$ 23.1	$ 22.3	$ 67.4	$ 63.3
LouisianaTimberProcurementCompanyLLC [Member] | Variable Interest Entity, Not Primary Beneficiary [Member]
Related Party Transaction [Line Items]
Variable interest entity, ownership percentage			50.00%
LouisianaTimberProcurementCompanyLLC [Member] | Packaging Corporation of America (PCA) [Member] | Variable Interest Entity, Primary Beneficiary [Member]
Related Party Transaction [Line Items]
Variable interest entity, ownership percentage			50.00%

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

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Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

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Percentage of the Variable Interest Entity's (VIE) voting interest owned by (or beneficial interest in) the reporting entity (directly or indirectly).

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