Number of Small Tube And Core Plants

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The charge against earnings resulting from the write down of long lived assets other than goodwill due to the difference between the carrying value and lower fair value.

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Amount of expected cost remaining for the specified restructuring cost.

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The number of positions eliminated as of the balance sheet date since inception of the restructuring plan(s).

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Restructuring and asset impairment - Additional Information (Details) $ in Thousands		12 Months Ended
	Jul. 01, 2022 USD ($)	Dec. 31, 2023 USD ($) employee	Dec. 31, 2022 USD ($) manufacturing_plant position	Dec. 31, 2021 USD ($)
Disposal Group, Including Discontinued Operations [Line Items]
Asset impairment loss/(gain)		$ 26,445	$ 21,444	$ (4,082)
Future additional charges expected to be recognized		2,300
Other asset impairments		$ 0	10,095	$ 5,034
Impact of new accounting pronouncements
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments	$ 3,747
All Other
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments			$ 9,165
Industrial Paper Packaging
Disposal Group, Including Discontinued Operations [Line Items]
Number of small tube and core plants \| manufacturing_plant			2
Consumer Packaging
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments			$ 930
Organizational Effectiveness Efforts
Disposal Group, Including Discontinued Operations [Line Items]
Elimination of positions due to realignment of cost structure (position)		300	180
Asset impairment loss/(gain)			$ 3,620