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Acquisitions and divestitures - Divestitures - Additional Information (Details) a in Thousands |  |  |  |  | 1 Months Ended | 3 Months Ended | 6 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | --- | --- | --- | ---
Dec. 23, 2024 USD ($) | Jul. 01, 2023 USD ($) | Mar. 29, 2023 USD ($) a | Jan. 26, 2023 USD ($) | Nov. 30, 2024 USD ($) productionFacility | Sep. 29, 2024 USD ($) | Jun. 30, 2024 USD ($) | Oct. 01, 2023 USD ($) | Jul. 02, 2023 USD ($) | Apr. 02, 2023 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 18, 2024 USD ($) | Apr. 01, 2024 USD ($)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, impairment loss |  |  |  |  |  |  |  |  |  |  |  | $ 0 |  |  |  |
Pre-tax gain |  |  |  |  |  |  |  |  |  |  |  | $ (23,452,000) | $ 78,929,000 | $ 0 |  |
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration] |  |  |  |  |  |  |  |  |  |  |  | Pre-tax gain |  |  |  |
Dispositions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Number of production facilities | productionFacility |  |  |  |  | 2 |  |  |  |  |  |  |  |  |  |  |
Consideration for disposal of business held for sale |  |  |  |  | $ 302,000 |  |  |  |  |  |  |  |  |  |  |
Reclassified cumulative translation losses |  |  |  |  | 590,000 |  |  |  |  |  |  |  |  |  |  |
Asset write off |  |  |  |  | $ 25,607,000 |  |  |  |  |  |  |  |  |  |  |
Dispositions | Thermoformed and Flexible Packaging business and its Global Trident business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration for disposal of business held for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 1,800,000,000 |
Dispositions | Black Diamond Capital Management LLC |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration for disposal of business held for sale |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 80,267,000
Write off of assets as part of the sale totaling |  |  |  |  |  |  | $ 905,000 |  |  |  |  |  |  |  |  |
Working capital adjustment |  |  |  |  |  | $ 1,805,000 |  |  |  |  |  |  |  |  |  |
Dispositions | Protective Solutions "Protexic" |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net assets disposed |  |  |  |  |  |  | 74,644,000 |  |  |  |  |  |  |  |  |
Goodwill, impairment loss |  |  |  |  |  |  | 16,559,000 |  |  |  |  |  |  |  |  |
Cumulative translation adjustment losses |  |  |  |  |  |  | 2,913,000 |  |  |  |  |  |  |  |  |
Dispositions | US BulkSak Business |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration for disposal of business held for sale |  | $ 1,096,000 |  |  |  |  |  |  |  |  | $ 20,271,000 |  | $ 20,271,000 |  |  |
Net assets disposed |  | 13,437,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, impairment loss |  | 3,333,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Write off of assets as part of the sale totaling |  | 6,834,000 |  |  |  |  |  | $ (537,000) | $ 7,371,000 |  |  |  |  |  |  |
Proceeds from the sale of business, net |  |  |  |  |  |  |  |  |  |  | $ 18,271,000 |  |  |  |  |
Restricted cash |  |  |  |  |  |  |  |  |  |  |  | $ 2,000,000 |  |  |  |
Pre-tax gain |  | $ 85,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |
Dispositions | US BulkSak Business | Maximum |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Funds held in escrow, term |  |  |  |  |  |  |  |  |  |  |  | 18 months |  |  |  |
Dispositions | Sonoco Sustainability Solutions |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill, impairment loss |  |  |  |  |  |  |  |  |  | $ 3,042,000 |  |  |  |  |  |
Write off of assets as part of the sale totaling |  |  |  |  |  |  |  |  |  | 4,274,000 |  |  |  |  |  |
Proceeds from the sale of business, net |  |  |  | $ 13,839,000 |  |  |  |  |  |  |  |  |  |  |  |
Restricted cash |  |  |  | 1,500,000 |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax gain |  |  |  |  |  |  |  |  |  | $ 11,065,000 |  |  |  |  |  |
Consideration from disposal, equity interest, value received |  |  |  |  |  |  | $ 1,250,000 |  |  |  |  |  |  |  |  |
Dispositions | Northstar |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the sale of business, net | $ 8,630,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Pre-tax gain | $ 3,630,000 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Consideration from disposal, equity interest, value received |  |  |  | $ 5,000,000 |  |  |  |  |  |  |  |  |  |  |  |
Consideration from disposal, equity interest percentage received |  |  |  | 2.70% |  |  |  |  |  |  |  |  |  |  |  |
Dispositions | Timberland Properties |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Proceeds from the sale of business, net |  |  | $ 70,802,000 |  |  |  |  |  |  |  |  |  |  |  |  |
Area of land | a |  |  | 55 |  |  |  |  |  |  |  |  |  |  |  |  |
Disposed assets net book value |  |  |  |  |  |  |  |  |  |  |  | $ 9,857,000 |  |  |  |
Gain on the sale of business |  |  |  |  |  |  |  |  |  |  |  | $ 60,945,000 |  |  |  |

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