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Summary of significant accounting policies - Additional Information (Details) $ in Thousands		12 Months Ended
	Oct. 13, 2022 USD ($)	Dec. 31, 2022 USD ($) segment	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)	Jan. 26, 2023 USD ($)	Nov. 09, 2022
Summary Of Significant Accounting Policies [Line Items]
Carrying value of equity investments		$ 59,171	$ 54,356
Accounts payable for supply chain financing		52,415	46,832
Research and development costs		$ 28,700	$ 24,100	$ 22,000
Percentage of LIFO inventory (percent)		11.00%	15.00%
LIFO inventory amount		$ 51,342	$ 22,900
Number of reportable segments (segment) | segment		2
Sonoco Sustainability Solutions | Dispositions | Subsequent event
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, LLC
Summary Of Significant Accounting Policies [Line Items]
Percentage of controlling asset acquired (percent)		65.00%				65.00%
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)		13.00%	10.00%
Chilean tube
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership of investments accounted for under the cost method (percent)		19.50%
Finland Small Recycling Business
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership of investments accounted for under the cost method (percent)	12.20%
Cash proceeds	$ 3,830
Recognized a gain on the sale	$ 1,242
Sustainable Protective Packaging Solutions
Summary Of Significant Accounting Policies [Line Items]
Percentage ownership of investments accounted for under the cost method (percent)		18.00%

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