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Acquisitions and divestitures - Acquisitions - Additional Information (Details) $ in Thousands												4 Months Ended	5 Months Ended	12 Months Ended
	Dec. 01, 2023 USD ($) employee location	Sep. 08, 2023 USD ($) employee facility paper_mill	Nov. 15, 2022 USD ($)	Aug. 31, 2022 USD ($)	Aug. 31, 2022 USD ($) acquisition	Aug. 31, 2022 USD ($) manufacturing_plant	Jan. 26, 2022 USD ($) manufacturing_plant	Dec. 30, 2021 USD ($)	Nov. 08, 2021 USD ($) facility	Aug. 03, 2021 USD ($)	Mar. 08, 2021 USD ($)	Dec. 31, 2023 USD ($)	Aug. 03, 2021 facility	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($) acquisition	Dec. 31, 2021 USD ($) acquisition
Business Acquisition [Line Items]
Cash consideration, net of cash acquired														$ 372,616	$ 1,427,020	$ 22,209
Gain/(Loss) on divestiture of businesses														57,104	0	(2,667)
Number of acquisitions | facility													2
Goodwill												$ 1,810,654		1,810,654	1,675,311
Platinum Equity
Business Acquisition [Line Items]
Joint venture, ownership (percent)							51.00%
Ball Corporation
Business Acquisition [Line Items]
Joint venture, ownership (percent)							49.00%
Inapel
Business Acquisition [Line Items]
Total consideration	$ 59,228
Approximate number of employees (employee) | employee	500,000
Expected value of goodwill to be tax deductible	$ 0
Property, plant and equipment												11,456		11,456
Other intangible assets												8,653		8,653
Goodwill												15,704		15,704
Inapel | BRAZIL
Business Acquisition [Line Items]
Number of manufacturing locations | location	2
RTS Packaging
Business Acquisition [Line Items]
Voting interest acquired		65.00%
Interest held in acquiree before subsequent acquisition (percent)		35.00%
Fair value of previously held interest in RTS Packaging		$ 59,472
Business combination, carrying value		8,654
Business combination, net gain		50,818
Accumulated other comprehensive loss including foreign currency translation losses		2,033
Accumulated other comprehensive loss including define pension plan, before tax		4,756
Settlement of unfavorable contract		4,372
Gain/(Loss) on divestiture of businesses														39,657
RTS Packaging and Chattanooga Mill
Business Acquisition [Line Items]
Total consideration		$ 374,547
Approximate number of employees (employee) | employee		1,100,000
Cash consideration, net of cash acquired		$ 313,388
Expected value of goodwill to be tax deductible		87,191
Property, plant and equipment		73,483										74,236		74,236
Other intangible assets		199,560										190,565		190,565
Goodwill		$ 92,657										107,566		107,566
Inventories												$ (947)
RTS Packaging and Chattanooga Mill | Industrial Paper Packaging
Business Acquisition [Line Items]
Number of converting operations | facility		14
RTS Packaging and Chattanooga Mill | Industrial Paper Packaging | United States
Business Acquisition [Line Items]
Number of converting operations | facility		10
Number of paper mills acquired | paper_mill		1
RTS Packaging and Chattanooga Mill | Industrial Paper Packaging | Mexico
Business Acquisition [Line Items]
Number of converting operations | facility		2
RTS Packaging and Chattanooga Mill | Industrial Paper Packaging | South America
Business Acquisition [Line Items]
Number of converting operations | facility		2
2022 Acquisitions
Business Acquisition [Line Items]
Cash consideration, net of cash acquired															$ 1,444,618
Number of acquisitions | acquisition															3
Skjern
Business Acquisition [Line Items]
Total consideration			$ 89,610
Property, plant and equipment			40,489
Other intangible assets			39,330
Liabilities			(22,403)
Goodwill			$ 32,194
Inventories														14
Nordeste
Business Acquisition [Line Items]
Total consideration				$ 6,419
Number of acquisitions					2	2
Property, plant and equipment				1,374	$ 1,374	$ 1,374
Other intangible assets				3,031	3,031	3,031
Payments to acquire businesses, gross				3,933
Goodwill				2,014	2,014	2,014
Contingent purchase liability				$ 2,486	$ 2,486	$ 2,486
Inventories														(38)
Metalpack Packaging
Business Acquisition [Line Items]
Cash consideration, net of cash acquired							$ 1,348,589
Acquisition and divestiture-related costs															$ 28,171
Inventories														$ (73)	$ 33,155
Number of facilities acquired | manufacturing_plant							8
2021 Acquisitions
Business Acquisition [Line Items]
Cash consideration, net of cash acquired																$ 20,697
Number of acquisitions | acquisition																4
American Recycling
Business Acquisition [Line Items]
Cash consideration, net of cash acquired								$ 6,267
D&W Paper Tube Inc.
Business Acquisition [Line Items]
Cash consideration, net of cash acquired									$ 12,787
Number of facilities acquired | facility									2
Allied Packaging Pty Ltd
Business Acquisition [Line Items]
Payments to acquire businesses, gross										$ 802
TuboTec
Business Acquisition [Line Items]
Payments to acquire businesses, gross											$ 841

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