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General (Details) $ in Millions			3 Months Ended	12 Months Ended
	Nov. 30, 2023 USD ($)	Jul. 05, 2022 segment	Sep. 30, 2022 segment	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Aug. 01, 2023 USD ($)
Schedule of Equity Method Investments [Line Items]
Number of reportable segments | segment		2	2
Income from discontinued operations, net of tax				$ 198.2	$ 62.3	$ 87.2
Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Income from discontinued operations, net of tax				$ 198.2	$ 62.3	$ 87.2
Engineered Papers Business
Schedule of Equity Method Investments [Line Items]
Total proceeds							$ 620.0
Engineered Papers Business | Discontinued Operations, Disposed of by Sale
Schedule of Equity Method Investments [Line Items]
Gain on sale	$ 176.3
Income from discontinued operations, net of tax	$ 170.0

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