Amount of loss from the write-down of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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Name:	us-gaap_GoodwillImpairmentLoss
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Quarterly Results of Operations (Unaudited) - Summary of Quarterly Financial Data (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Quarterly Financial Data [Line Items]
Goodwill impairment charge	$ 0.0
Paper Reporting Unit \| Jackson Alabama Mill [Member]
Quarterly Financial Data [Line Items]
Restructuring charges			$ 8.8
Paper [Member] \| Jackson Alabama Mill [Member]
Quarterly Financial Data [Line Items]
Restructuring charges				$ 9.3
Packaging [Member]
Quarterly Financial Data [Line Items]
Restructuring charges		$ 14.4