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Acquisitions and divestitures - Acquisitions - Additional Information (Details) $ in Thousands |  |  |  |  |  |  |  |  |  | 4 Months Ended | 5 Months Ended | 12 Months Ended
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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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