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Commitments, Guarantees, Indemnifications, and Legal Proceedings - Additional Information (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended
		Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024	Dec. 31, 2024
Schedule Of Commitments And Contingencies [Line Items]
DeRidder litigation	[1]	$ 3.5	$ 2.0	$ 3.5	$ 127.7
DeRidder, Louisiana | Prepaid Expenses and Other Current Assets [Member]
Schedule Of Commitments And Contingencies [Line Items]
Loss contingency, Receivable, Current		59.2		59.2		$ 59.2
DeRidder, Louisiana | Accrued Liabilities [Member]
Schedule Of Commitments And Contingencies [Line Items]
Loss contingency, Receivable, Current		$ 59.2		$ 59.2		$ 59.2
[1] For the three and nine months ended September 30, 2025, includes charges and income related to fully insured settlement amounts. For the three and nine months ended September 30, 2024, includes charges and income related to the DeRidder mill lawsuit for compensatory damages plus interest. For more information on the DeRidder mill lawsuit, see Note 19, Commitments, Guarantees, Indemnifications, and Legal Proceedings, of the Notes to Consolidated Financial Statements in “Part II, Item 8. Financial Statements and Supplementary Data” of our 2024 Annual Report on Form 10-K.

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Schedule of commitments and contingencies.

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Amount of receivable related to a loss contingency accrual that is expected to be collected within one year or the normal operating cycle, if longer. For example, an insurance recovery receivable.

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 460
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-Name Accounting Standards Codification
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The amount of cash paid for the settlement of litigation or for other legal issues during the period.

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-Section 45
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