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Summary of significant accounting policies - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) segment	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Sep. 08, 2023	Jan. 26, 2023 USD ($)
Summary Of Significant Accounting Policies [Line Items]
Carrying value of equity investments	$ 56,399	$ 59,171
Research and development costs	$ 29,300	$ 28,700	$ 24,100
Percentage of LIFO inventory (percent)	13.00%	11.00%
LIFO inventory amount	$ 39,528	$ 51,342
Portfolio approach, lease, short rate term (or less)	10 years
Portfolio approach, lease, long rate term (greater than)	10 years
Number of reportable segments (segment) | segment	2
Sonoco Sustainability Solutions | Dispositions
Summary Of Significant Accounting Policies [Line Items]
Consideration from disposal, equity interest percentage received					2.70%
Consideration from disposal, equity interest, value received					$ 5,000
RTS Packaging
Summary Of Significant Accounting Policies [Line Items]
Voting interest acquired				65.00%
Interest held in acquiree before subsequent acquisition (percent)				35.00%
Minimum
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	3 years
Expected years of return on plan of investment	12 years
Minimum | Equipment
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment, useful life	3 years
Minimum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment, useful life	15 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Intangible assets, useful life	40 years
Expected years of return on plan of investment	15 years
Maximum | Equipment
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment, useful life	11 years
Maximum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Property plant and equipment, useful life	40 years
Net sales | Customer concentration | Customers that sponsor/promote multi-vendor supply chain finance arrangements | Multi-Vendor Supply Chain Finance Arrangement
Summary Of Significant Accounting Policies [Line Items]
Customer concentrations (percent)	14.00%	13.00%
Chilean tube
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership in equity method investment (percent)	19.50%
Sustainable Protective Packaging Solutions
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership in equity method investment (percent)	20.50%

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