Sonoco Products (SON) 10-K 28 Feb 24 2023 FY Annual report Financial data

Cover

Cover - USD ($)	12 Months Ended
	Dec. 31, 2023	Feb. 16, 2024	Jun. 30, 2023
Cover [Abstract]
Document Type	10-K
Document Annual Report	true
Document Period End Date	Dec. 31, 2023
Current Fiscal Year End Date	--12-31
Document Transition Report	false
Entity File Number	001-11261
Entity Registrant Name	SONOCO PRODUCTS COMPANY
Entity Incorporation, State or Country Code	SC
Entity Tax Identification Number	57-0248420
Entity Address, Address Line One	1 N. Second St.
Entity Address, City or Town	Hartsville
Entity Address, State or Province	SC
Entity Address, Postal Zip Code	29550
City Area Code	843
Local Phone Number	383-7000
Title of 12(b) Security	No par value common stock
Trading Symbol	SON
Security Exchange Name	NYSE
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Large Accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
ICFR Auditor Attestation Flag	true
Document Financial Statement Error Correction	false
Entity Shell Company	false
Entity Public Float			$ 5,752,118,002
Entity Common Stock, Shares Outstanding		98,127,878
Documents Incorporated by Reference	Portions of the Proxy Statement for the annual meeting of shareholders to be held on April 17, 2024, which statement shall be filed with the Securities and Exchange Commission within 120 days after the end of the fiscal year to which this Report relates, are incorporated by reference in Part III.
Entity Central Index Key	0000091767
Document Fiscal Year Focus	2023
Document Fiscal Period Focus	FY
Amendment Flag	false

Audit Information

Audit Information	12 Months Ended
	Dec. 31, 2023
Audit Information [Abstract]
Auditor Firm ID	238
Auditor Name	PricewaterhouseCoopers LLP
Auditor Location	Charlotte, North Carolina

CONSOLIDATED BALANCE SHEETS

CONSOLIDATED BALANCE SHEETS - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Current Assets
Cash and cash equivalents	$ 151,937	$ 227,438
Trade accounts receivable, net of allowances of $21,661 in 2023 and $16,879 in 2022	904,898	862,712
Other receivables	106,644	99,492
Inventories
Finished and in process	324,910	453,981
Materials and supplies	448,591	641,577
Prepaid expenses	113,385	76,054
Total Current Assets	2,050,365	2,361,254
Property, Plant and Equipment, Net	1,906,137	1,710,399
Goodwill	1,810,654	1,675,311
Other Intangible Assets, Net	853,670	741,598
Long-term Deferred Income Taxes	31,329	29,878
Right of Use Asset-Operating Leases	314,944	296,781
Other Assets	224,858	237,719
Total Assets	7,191,957	7,052,940
Current Liabilities
Payable to suppliers	707,490	818,885
Accrued expenses and other	324,338	295,841
Accrued wages and other compensation	75,676	109,830
Notes payable and current portion of long-term debt	47,132	502,440
Accrued taxes	10,641	16,905
Total Current Liabilities	1,165,277	1,743,901
Long-term Debt	3,035,868	2,719,783
Noncurrent Operating Lease Liabilities	265,454	250,994
Pension and Other Postretirement Benefits	142,900	120,084
Deferred Income Taxes	100,788	107,293
Other Liabilities	49,835	38,088
Commitments and Contingencies (Note 17)
Sonoco Shareholders’ Equity
Serial preferred stock, no par value Authorized 30,000,000 shares 0 shares issued and outstanding as of December 31, 2021 and 2020
Common shares, no par value Authorized 300,000 shares 97,370 and 100,447 shares issued and outstanding as of December 31, 2021 and 2020, respectively	7,175	7,175
Capital in excess of stated value	159,047	140,539
Accumulated other comprehensive loss	(366,262)	(430,083)
Retained earnings	2,624,380	2,348,183
Total Sonoco Shareholders’ Equity	2,424,340	2,065,814
Noncontrolling Interests	7,495	6,983
Total Equity	2,431,835	2,072,797
Total Liabilities and Equity	$ 7,191,957	$ 7,052,940

CONSOLIDATED BALANCE SHEETS (Pa

CONSOLIDATED BALANCE SHEETS (Parenthetical) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Statement of Financial Position [Abstract]
Allowances for trade accounts receivable	$ 21,661	$ 16,879
Preferred stock, authorized (in shares)	30,000,000	30,000,000
Preferred stock, issued (in shares)	0	0
Preferred stock, outstanding (in shares)	0	0
Common stock, authorized (in shares)	300,000,000	300,000,000
Common stock, issued (in shares)	97,957,000	97,645,000
Common stock, outstanding (in shares)	97,957,000	97,645,000

CONSOLIDATED STATEMENTS OF INCO

CONSOLIDATED STATEMENTS OF INCOME - USD ($) shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Statement [Abstract]
Net sales	$ 6,781,292	$ 7,250,552	$ 5,590,438
Cost of sales	5,345,638	5,810,903	4,528,528
Gross profit	1,435,654	1,439,649	1,061,910
Selling, general and administrative expenses	741,860	707,343	558,180
Asset impairment loss/(gain)	56,933	56,910	14,210
Gain/(Loss) on divestiture of business and other assets	78,929	0	(2,667)
Operating profit	715,790	675,396	486,853
Other income, net	39,657	0	0
Non-operating pension costs	14,312	7,073	568,416
Interest expense	136,686	101,662	63,991
Interest income	10,383	4,621	4,756
Loss from the early extinguishment of debt	0	0	20,184
Income/(Loss) before income taxes	614,832	571,282	(160,982)
Provision for/(Benefit from) income taxes	149,278	118,509	(67,430)
Income/(Loss) before equity in earnings of affiliates	465,554	452,773	(93,552)
Equity in earnings of affiliates, net of tax	10,347	14,207	10,841
Net income/(loss)	475,901	466,980	(82,711)
Net income attributable to noncontrolling interests	(942)	(543)	(2,766)
Net income/(loss) attributable to Sonoco	$ 474,959	$ 466,437	$ (85,477)
Weighted average common shares outstanding:
Basic (in shares)	98,294	97,991	99,608
Assuming exercise of awards (in shares)	596	741	0
Diluted (in shares)	98,890	98,732	99,608
Net income/(loss) attributable to Sonoco:
Basic (usd per share)	$ 4.83	$ 4.76	$ (0.86)
Diluted (usd per share)	$ 4.80	$ 4.72	$ (0.86)

CONSOLIDATED STATEMENTS OF COMP

CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands		12 Months Ended
		Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Net income/(loss)		$ 475,901	$ 466,980	$ (82,711)
Other comprehensive income/(loss):
Foreign currency translation adjustments		70,308	(68,780)	(75,636)
Changes in defined benefit plans, net of tax	[1]	(8,654)	424	471,350
Change in derivative financial instruments, net of tax	[1]	1,737	(1,842)	1,119
Other comprehensive income/(loss)		63,391	(70,198)	396,833
Comprehensive income		539,292	396,782	314,122
Net income attributable to noncontrolling interests		(942)	(543)	(2,766)
Other comprehensive loss/(income) attributable to noncontrolling interests		430	(460)	584
Comprehensive income attributable to Sonoco		$ 538,780	$ 395,779	$ 311,940
[1] net of tax

CONSOLIDATED STATEMENTS OF CHAN

CONSOLIDATED STATEMENTS OF CHANGES IN TOTAL EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Common Shares	Capital in Excess of Stated Value	Accumulated Other Comprehensive Loss	Retained Earnings	Non- controlling Interests
Beginning Balance at Dec. 31, 2020		$ 1,910,528	$ 7,175	$ 314,056	$ (756,842)	$ 2,335,216	$ 10,923
Beginning Balance (in shares) at Dec. 31, 2020			100,447
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		(82,711)				(85,477)	2,766
Other comprehensive income/(loss):
Translation loss		(75,636)			(75,052)		(584)
Defined benefit plan adjustment	[1]	471,350			471,350
Derivative financial instruments	[1]	1,119			1,119
Other comprehensive income/(loss)		396,833			397,417		(584)
Dividends paid to noncontrolling interest		(1,009)					(1,009)
Dividends		(179,734)				(179,734)
Issuance of stock awards		1,111		1,111
Issuance of stock awards (in shares)			309
Shares repurchased		(218,085)		(218,085)
Stock repurchased and retired (in shares)			(3,386)
Share-based compensation		22,608		22,608
Ending Balance at Dec. 31, 2021		1,849,541	$ 7,175	119,690	(359,425)	2,070,005	12,096
Ending Balance (in shares) at Dec. 31, 2021			97,370
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		466,980				466,437	543
Other comprehensive income/(loss):
Translation loss		(68,780)			(69,240)		460
Defined benefit plan adjustment	[1]	424			424
Derivative financial instruments	[1]	(1,842)			(1,842)
Other comprehensive income/(loss)		(70,198)			(70,658)		460
Purchase of noncontrolling interest		(13,196)		7,080			6,116
Dividends		(188,259)				(188,259)
Issuance of stock awards		1,167		1,167
Issuance of stock awards (in shares)			354
Shares repurchased		(4,547)		(4,547)
Stock repurchased and retired (in shares)			(79)
Share-based compensation		31,309		31,309
Ending Balance at Dec. 31, 2022		$ 2,072,797	$ 7,175	140,539	(430,083)	2,348,183	6,983
Ending Balance (in shares) at Dec. 31, 2022		97,645	97,645
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 475,901				474,959	942
Other comprehensive income/(loss):
Translation loss		70,308			70,738		(430)
Defined benefit plan adjustment	[1]	(8,654)			(8,654)
Derivative financial instruments	[1]	1,737			1,737
Other comprehensive income/(loss)		63,391			63,821		(430)
Dividends		(198,762)				(198,762)
Issuance of stock awards		1,345		1,345
Issuance of stock awards (in shares)			488
Shares repurchased		(10,617)		(10,617)
Stock repurchased and retired (in shares)			(176)
Share-based compensation		27,780		27,780
Ending Balance at Dec. 31, 2023		$ 2,431,835	$ 7,175	$ 159,047	$ (366,262)	$ 2,624,380	$ 7,495
Ending Balance (in shares) at Dec. 31, 2023		97,957	97,957
[1] net of tax

CONSOLIDATED STATEMENTS OF CASH

CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Cash Flows from Operating Activities
Net income/(loss)	$ 475,901	$ 466,980	$ (82,711)
Adjustments to reconcile net income to net cash provided by operating activities:
Asset impairment loss/(gain)	26,445	21,444	(4,082)
Depreciation, depletion and amortization	340,988	308,824	245,184
Loss from the early extinguishment of debt	0	0	20,184
Share-based compensation expense	27,780	31,309	22,608
Equity in earnings of affiliates, net of tax	(10,347)	(14,207)	(10,841)
Cash dividends from affiliated companies	9,389	8,902	8,660
Net (gain)/loss on disposition of assets	(65,947)	(5,979)	15
Net (gain)/loss on divestiture of business	(57,104)	0	2,667
Pension and postretirement plan expense	17,460	10,697	595,620
Pension and postretirement plan contributions	(14,662)	(37,409)	(163,659)
Net decrease in deferred taxes	(12,209)	(9,876)	(158,836)
Change in assets and liabilities, net of effects from acquisitions, divestitures and foreign currency adjustments
Trade accounts receivable	24,935	(2,466)	(149,755)
Inventories	342,713	(353,478)	(130,119)
Payable to suppliers	(148,841)	27,225	172,430
Prepaid expenses	1,394	33,702	(13,077)
Income taxes payable and other income tax items	(28,286)	5,504	(42,204)
Accrued expenses and other assets and liabilities	(46,691)	17,877	(13,412)
Net cash provided by operating activities	882,918	509,049	298,672
Cash Flows from Investing Activities
Purchase of property, plant and equipment	(363,077)	(328,769)	(256,019)
Cost of acquisitions, net of cash acquired	(372,616)	(1,427,020)	(22,209)
Proceeds from the sale of business, net	33,237	0	91,569
Proceeds from the sale of assets	80,339	9,621	13,166
Investment in affiliated companies	(11,300)	(2,700)
Investment in affiliated companies			578
Other net investing proceeds	14,081	7,432	7,013
Net cash used by investing activities	(619,336)	(1,741,436)	(165,902)
Cash Flows from Financing Activities
Proceeds from issuance of debt	962,557	2,153,355	172,042
Principal repayment of debt	(1,112,917)	(285,511)	(628,119)
Net (decrease)/increase in commercial paper borrowings	0	(349,000)	349,000
Net increase/(decrease) in book cash overdrafts	6,408	(18,529)	6,974
Proceeds from interest rate swap	0	0	4,387
Cash dividends – common	(197,416)	(187,093)	(178,622)
Purchase of noncontrolling interest	0	(14,474)	0
Dividends paid to noncontrolling interests	0	0	(1,009)
Excess cash costs of early extinguishment of debt	0	0	(20,111)
Payments for share repurchases	(10,617)	(4,547)	(218,085)
Net cash (used)/provided by financing activities	(351,985)	1,294,201	(513,543)
Effects of Exchange Rate Changes on Cash	12,902	(5,354)	(13,097)
(Decrease)/Increase in Cash and Cash Equivalents	(75,501)	56,460	(393,870)
Cash and cash equivalents at beginning of year	227,438	170,978	564,848
Cash and cash equivalents at end of year	151,937	227,438	170,978
Supplemental Schedule of Non-Cash Investing Activities:
Non-cash additions to property, plant and equipment	23,168	20,250	27,343
Interest paid, net of amounts capitalized	135,910	88,208	68,189
Income taxes paid, net of refunds	$ 189,773	$ 122,881	$ 133,610

Summary of significant accounti

Summary of significant accounting policies	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Summary of significant accounting policies	Summary of significant accounting policies Basis of presentation The Consolidated Financial Statements include the accounts of Sonoco Products Company and its majority-owned subsidiaries (the “Company” or “Sonoco”) after elimination of intercompany accounts and transactions. Investments in affiliated companies in which the Company does not control the investee or in which the Company is not the primary beneficiary but has the ability to exercise significant influence over the investee’s financial and operating decisions, are accounted for by the equity method of accounting. Income applicable to these equity investments is reported in “Equity in earnings of affiliates, net of tax” in the Consolidated Statements of Income. Affiliated companies over which the Company exercised a significant influence at December 31, 2023, included: Entity Ownership Interest Percentage at December 31, 2023 Cascades Conversion, Inc. 50.0 % Cascades Sonoco, Inc. 50.0 % ISI Robotics, LLC 20.0 % Showa Products Company Ltd. 22.2 % Papertech Energía, S.L. 25.0 % Weidenhammer New Packaging, LLC 40.0 % On September 8, 2023, the Company completed the acquisition of the remaining 65% interest in RTS Packaging, LLC (“RTS Packaging”), from joint venture partner WestRock Company (“WestRock”). Prior to September 8, 2023, the Company reported its 35% interest in the RTS Packaging joint venture using the equity method of accounting. From the date of acquisition of the remaining 65% interest, RTS Packaging was accounted for under the acquisition method and its results of operations were included in the Company’s Consolidated Statements of Income. See Note 3 for additional information. In addition, the Company has certain other equity investments in which it is not able to exercise significant influence so they are accounted for under the measurement alternative (i.e., cost less impairment, adjusted for any qualifying observable price changes). These investments include a 19.5% ownership in a small tubes and cores business in Chile and an 20.5% ownership in a small South Carolina based designer and manufacturer of sustainable protective packaging solutions acquired in June 2022. They also include a 2.7% equity interest in Northstar Recycling Company, LLC (“Northstar”) valued at $5,000 which the Company acquired on January 26, 2023, as part of the sale of its Sonoco Sustainability Solutions (“S3”) business to Northstar. See Note 3 for more information. The aggregate carrying value of equity investments is reported in “Other Assets” in the Company’s Consolidated Balance Sheets and totaled $56,399 a nd $59,171 at December 31, 2023 and 2022, respectively. Estimates and assumptions The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates. Revenue recognition The Company records revenue generally at a point in time when control transfers to the customer either upon shipment or delivery, depending on the terms of sale. Additionally, in certain cases, control transfers over time in conjunction with production where the Company is entitled to payment with margin for products produced that are customer specific and without alternative use. For products that meet these two criteria, the Company recognizes over time revenue under the input method as goods are produced. The Company commonly enters into Master Supply Arrangements with customers to provide goods and/or services over specific time periods. Customers submit purchase orders with quantities and prices to create a contract for accounting purposes. Shipping and handling expenses are considered a fulfillment cost, and are included in “Cost of Sales,” and freight charged to customers is included in “Net Sales” in the Company's Consolidated Statements of Income. The Company has rebate agreements with certain customers. These rebates are recorded as reductions of sales and are accrued using sales data and rebate percentages specific to each customer agreement. Accrued customer rebates are included in “Accrued expenses and other” in the Company’s Consolidated Balance Sheets. Payment terms under the Company's arrangements are typically short term in nature. The Company provides prompt payment discounts to certain customers if invoices are paid within a predetermined period. Prompt payment discounts are determinable within a short period after the originating sale and like sales returns, are treated as a reduction of revenue. Accounts receivable and allowance for doubtful accounts The Company’s trade accounts receivable are non-interest bearing and are recorded at the invoiced amounts. The allowance for doubtful accounts represents the Company’s best estimate of the amount of probable credit losses in existing accounts receivable. The Company performs an evaluation of lifetime expected credit losses inherent in its accounts receivable at each balance sheet date. Such an evaluation includes consideration of historical loss experience, trends in customer payment frequency, present economic conditions, and judgment about the future financial health of its customers and industry sector. The allowance for doubtful accounts is monitored on a regular basis and adjustments are made as needed to ensure that the account properly reflects the Company’s best estimate of uncollectible trade accounts receivable. Account balances are charged off against the allowance for doubtful accounts when the Company determines that the receivable will not be recovered. No single customer comprised 10% or more of the Company’s consolidated net sales in 2023, 2022 or 2021, nor did the receivables balance from any single customer comprise 10% or more of the Company’s total trade accounts receivable at December 31, 2023 or December 31, 2022. The Company engages with third-party financial institutions to sell certain trade accounts receivable from customers in order to accelerate its cash collection cycle. In addition, the Company also participates in supply chain finance arrangements promoted by certain of its customers. Receivables transferred under both these arrangements generally meet the requirements to be accounted for as a true sale in accordance with guidance under Accounting Standards Codification (“ASC”) 860, “Transfers and Servicing,” resulting in derecognition of such receivables from the Company’s consolidated balance sheets. The sales under these arrangements are made without recourse and the Company’s only continuing involvement with the sold receivables is providing collection services related to the transferred assets. The servicing fees for these arrangements are immaterial to the financial statements given the short-term nature of our arrangements. In total, approximately 14% and 13% of the Company’s consolidated net sales were subject to settlement under these arrangements in 2023 and 2022, respectively. Accounts payable and supply chain financing The Company facilitates voluntary supply chain financing programs (the “SCF Programs”) to provide certain of its suppliers with the opportunity to sell receivables due from the Company to the participating financial institutions in the programs. Such sales are conducted at the sole discretion of both the suppliers and the financial institutions on a nonrecourse basis at a rate that leverages the Company’s credit rating and thus might be more beneficial to the supplier. No guarantees are provided by the Company or any of our subsidiaries under the SCF Programs. The Company’s responsibility under the agreements is limited to making payment to the financial institutions for confirmed invoices based on the terms originally negotiated with its suppliers. Both the Company and the financial institutions have the right to terminate the SCF Programs by providing 30 days prior written notice to the other party. The Company does not enter into any agreements with suppliers regarding their participation in the SCF Programs. Research and development Research and development costs are charged to expense as incurred and include salaries and other directly related expenses. Research and development costs totaling approximately $29,300 in 2023 , $28,700 in 2022 and $24,100 in 2021 are included in “Selling, general and administrative expenses” in the Company’s Consolidated Statements of Income. Restructuring and asset impairment Costs associated with exit or disposal activities are recognized when the liability is incurred. Identifying and calculating the cost to exit operations requires certain assumptions to be made about anticipated future liabilities, including severance costs, contractual obligations, and disposition of property, plant and equipment and leased assets. If assets become impaired as a result of a restructuring action, they are written down to fair value, less estimated costs to sell, if applicable. A number of significant estimates and assumptions are involved in the determination of fair value. The Company considers historical experience and all available information at the time the estimates are made; however, the amounts that are ultimately realized upon the sale of divested assets may differ from the estimated fair values reflected in the Company’s Consolidated Financial Statements. For facility closures, the Company also generally expects to record costs for equipment relocation and facility carrying costs as incurred and to accrue costs to terminate a lease or other contracts before the end of their term. Cash and cash equivalents Cash equivalents are composed of highly liquid investments with an original maturity to the Company of three months or less when purchased. Cash equivalents are recorded at cost, which approximates fair market value. The Company’s cash and cash equivalents are primarily placed with large sophisticated creditworthy financial institutions thereby limiting the Company’s credit exposure. Inventories The majority of the Company’s inventories are accounted for using the first-in, first-out (FIFO) method and are stated at the lower of cost or net realizable value. The last-in, first-out (LIFO) method is used for the valuation of certain of the Company’s domestic inventories, primarily metal, internally manufactured paper and paper purchased from third parties, and a pproxim ated 13% and 11% of total inventories at December 31, 2023 and 2022, respectively. Inventories accounted for using the LIFO method are stated at the lower of cost or market. If the FIFO method of accounting had been used for all inventories, total inventory would have been higher by $39,528 and $51,342 at December 31, 2023 and 2022, respectively. Property, plant and equipment Property, plant and equipment assets represent the original cost of land, buildings and equipment, less depreciation, computed under the straight-line method over the estimated useful lives of the assets, and are reviewed for impairment whenever events indicate the carrying value may not be recoverable. Equipment lives generally range from 3 to 11 years, and buildings range from 15 to 40 years. Expenditures for repairs and maintenance are charged to expense as incurred. When properties are retired or otherwise disposed of, the cost and accumulated depreciation are eliminated from the asset and related allowance accounts, respectively. Gains or losses upon disposal are credited or charged to income as incurred. The Company sold its timberland properties in March 2023. Prior to the sale, these timber resources were stated at cost and depletion expense was recognized based on the estimated number of units of timber cut during the period. Leases At the inception of a contract, the Company assesses whether the contract is, or contains, a lease. The assessment is based on (1) whether the contract involves the use of a distinct identified asset, (2) whether the Company obtains the right to substantially all the economic benefit from the use of the asset throughout the period, and (3) whether the Company has the right to direct the use of the asset. When the Company determines a lease exists, a leased asset and corresponding lease liability are recorded on its consolidated balance sheet. Lease contracts with a term of 12 months or less are not recorded on the consolidated balance sheet in conjunction with the Company's practical expedient election under ASC 842, “Leases.” Leased assets represent the Company’s right to use an underlying asset during the lease term and are reviewed for impairment whenever events indicate the carrying value may not be recoverable. Lease liabilities represent the Company’s obligation arising from the lease. The Company’s leased assets and liabilities may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise those options. The Company has lease agreements with non-lease components that relate to lease components (e.g., common area maintenance such as cleaning or landscaping, etc.). The Company accounts for each lease and any non-lease components associated with that lease as a single lease component for all underlying asset classes in accordance with the scope of the lease accounting standard. Leased assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. When the implicit rate in the Company’s leases is not readily determinable, the Company calculates its lease liabilities using discount rates based upon the Company’s incremental secured borrowing rate, which contemplates and reflects a particular geographical region’s interest rate for the leases active within that region of the Company’s global operations. The Company further utilizes a portfolio approach by assigning a “short” rate to contracts with lease terms of 10 years or less and a “long” rate for contracts greater than 10 years. Lease payments may be fixed or variable, however, only fixed payments or in-substance fixed payments are included in determining the lease liability. Variable lease payments are recognized in operating expenses in the period in which the expense is paid during the lease term. The Company recognizes fixed lease expense for operating leases on a straight-line basis over the lease term. For finance leases, the Company recognizes interest expense on the lease liability using the effective interest method over the lease term and the finance lease asset balance is amortized on a straight-line basis. Goodwill Goodwill is not amortized. The Company assesses its goodwill for impairment annually during the third quarter, or from time to time when warranted by the facts and circumstances surrounding individual reporting units or the Company as a whole. In performing the impairment test, the Company compares the fair value of the reporting unit with its carrying amount, and if the carrying value of the reporting unit exceeds the fair value of that reporting unit, an impairment charge is recognized for the excess. In determining the fair value of the reporting units, management considered both the income approach and the market approach. Fair value was estimated using a discounted cash flow model based on projections of future years’ operating results and associated cash flows combined with comparable trading and transaction multiples based on guideline public companies. The calculated estimated fair value of the reporting unit reflects a number of significant management assumptions and estimates including the forecast of sales growth, gross profit margins, and discount rates. Changes in these assumptions could materially impact the estimated fair value. The Company’s projections incorporate management's best estimates of the expected future results, which include expectations related to new and retained business and future operating margins. Projected future cash flows are then discounted to present value using a discount rate management believes is commensurate with the risks inherent in the cash flows. Impairment of long-lived, intangible and other assets Other intangible assets are amortized using the straight-line method when management has determined that the straight-line method approximates the pattern of consumption of the respective intangible assets, or in relation to the specific pattern of consumption of the assets if the straight-line method does not provide a fair approximation of the consumption of benefits. The useful lives of the Company’s intangible assets generally range from 3 to 40 years. The Company has no intangibles with indefinite lives. The Company evaluates its intangible assets for impairment whenever indicators of impairment exist. Assumptions and estimates used in the evaluation of potential impairment can result in adjustments affecting the carrying values of long-lived, intangible and other assets and the recognition of impairment expense in the Company’s Consolidated Financial Statements. The Company evaluates its long-lived assets (property, plant and equipment), definite-lived intangible assets and other assets (including right of use lease assets, notes receivable and equity and other investments) for impairment whenever indicators of impairment exist, or when it commits to sell the asset. If the sum of the undiscounted expected future cash flows from a long-lived asset, definite-lived intangible, or other asset group is less than the carrying value of that asset group, an asset impairment charge is recognized. Key assumptions and estimates used in the projection of expected future cash flows generally include price levels, sales growth, profit margins and asset life. The amount of an impairment charge, if any, is calculated as the excess of the asset’s carrying value over its fair value, generally represented by the discounted future cash flows from that asset or, in the case of assets the Company evaluates for sale, estimated sale proceeds less costs to sell. The Company takes into consideration historical data and experience together with all other relevant information available when estimating the fair values of its assets. However, fair values that could be realized in actual transactions may differ from the estimates used to evaluate impairment. In addition, changes in the assumptions and estimates may result in a different conclusion regarding impairment. Income taxes The Company provides for income taxes using the asset and liability method. Under this method, deferred tax assets and liabilities are determined based on differences between financial reporting requirements and tax laws. Assets and liabilities are measured using the enacted tax rates and laws that will be in effect when the differences are expected to reverse. The Company recognizes liabilities for uncertain income tax positions based on its estimate of whether it is more likely than not that additional taxes will be required and the Company reports related interest and penalties within provision for income taxes on the consolidated statement of income. Derivatives The Company uses derivatives to mitigate the effect of fluctuations in some of its raw material and energy costs, foreign currencies, and, from time to time, interest rates. The Company purchases commodities such as metal and energy, generally at market or at fixed prices that are established with the vendor as part of the purchase process for quantities expected to be consumed in the ordinary course of business. The Company may enter into commodity futures or swaps to manage the effect of price fluctuations. The Company may use foreign currency forward contracts and other risk management instruments to manage exposure to changes in foreign currency cash flows and the translation of monetary assets and liabilities on the Company’s consolidated financial statements. The Company is exposed to interest-rate fluctuations as a result of using debt as a source of financing for its operations. The Company may from time to time use traditional, unleveraged interest rate swaps to manage its exposure to interest rate movements. Additionally, the Company elected the normal purchase, normal sale scope exception for physical commodity contracts that meet the definition of a derivative. Derivative instruments, to the extent in an asset position, expose the Company to credit loss in the event of nonperformance by the counterparties to the derivative agreements. The Company manages its exposure to counterparty credit risk through minimum credit standards, diversification of counterparties and procedures to monitor concentrations of credit risk. The Company may enter into financial derivative contracts that may contain credit-risk-related contingent features, which could result in a counterparty requesting immediate payment or demanding immediate and ongoing full overnight collateralization on derivative instruments in net liability positions. The Company records its derivatives as assets or liabilities on the balance sheet at fair value using published market prices or estimated values based on current price and/or rate quotes and discounted estimated cash flows. Changes in the fair value of derivatives designated as accounting hedges are recognized in net income, and otherwise are recognized in other comprehensive income. Amounts in accumulated other comprehensive income are reclassified into earnings in the same period or periods during which the hedged forecasted transaction affects earnings. It is the Company’s policy not to speculate in derivative instruments. Share-Based Compensation Plans The Company utilizes share-based compensation in the form of restricted stock units, performance contingent restricted stock units, and other share-based awards. The fair value of the Company’s restricted stock units is equal to the closing price of the Company’s stock on the date of grant discounted for any projected dividends that are not eligible to be received during the vesting period.The amount of share-based compensation expense associated with performance contingent restricted stock units is based on estimates of future performance using measures defined in the stock plan descriptions for each award granted. As of December 31, 2023, these performance measures include the following: • Adjusted earnings per share — three-year sum of forecasted future and historical annual adjusted earnings per share for the three-year measurement period associated with each award; and • Return on invested capital — three-year simple average of annual returns calculated by dividing 1) adjusted operating profit after tax (derived from historical or projected earnings) by 2) the average of total historical or projected debt plus equity for the respective annual periods. For the most recent award grant in 2023, the performance payout will be subject to adjustment by a total stock return modifier as determined by the Company’s relative performance within its targeted peer group. Changes in estimates regarding the future achievement of these performance measures may result in significant fluctuations from period to period in the amount of share-based compensation expense recognized in the Company’s Consolidated Financial Statements. Pension and Postretirement Benefit Plans The Company provides non-contributory defined benefit pension plans for certain of its employees in the United States, Mexico, Belgium, Germany, Greece, France, and Turkey. The Company also sponsors contributory defined benefit pension plans covering certain of its employees in the United Kingdom, Canada and the Netherlands, and provides postretirement healthcare and life insurance benefits to a limited number of its retirees and their dependents in the United States and Canada, based on certain age and/or service eligibility requirements. The actuarial valuations used to evaluate the plans employ key assumptions that can have a significant effect on the calculated amounts. The Company adjusts its discount rates at the end of each fiscal year based on yield curves of high-quality debt instruments over durations that match the expected benefit payouts of each plan. The expected rate of return assumption is derived by taking into consideration the targeted plan asset allocation, projected future returns by asset class and active investment management. A third-party asset return model is used to develop an expected range of returns on plan investments over a 12- to 15-year period, with the expected rate of return selected from a best estimate range within the total range of projected results. The Company periodically re-balances its plan asset portfolio in order to maintain the targeted allocation levels. The rate of compensation increase assumption is generally based on salary and incentive compensation increases. Other assumptions and estimates impacting the projected liabilities of these plans include inflation, participant withdrawal and mortality rates, medical cost trends, and retirement ages. The Company evaluates the assumptions used in projecting the pension and postretirement liabilities and associated expenses annually. These judgments, assumptions and estimates may affect the carrying value of pension and postretirement plan net assets and liabilities and pension and postretirement plan expenses in the Company’s Consolidated Financial Statements. Business combinations The Company’s acquisitions of businesses are accounted for in accordance with ASC 805, “Business Combinations.” The Company recognizes the identifiable assets acquired, the liabilities assumed, and any noncontrolling interests in an acquired business at their fair values as of the date of acquisition. Goodwill is measured as the excess of consideration transferred, also measured at fair value, over the net of the acquisition date fair values of the identifiable assets acquired and liabilities assumed. The acquisition method of accounting requires the Company to make significant estimates and assumptions regarding the fair values of the elements of a business combination as of the date of acquisition, including the fair values of identifiable intangible assets; property, plant and equipment; deferred tax asset valuation allowances; liabilities including those related to debt, pensions and other postretirement plans; uncertain tax positions; contingent consideration and contingencies. This method also requires the Company to refine these estimates over a measurement period not to exceed one year to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. If the Company is required to adjust provisional amounts that were recorded for the fair values of assets and liabilities in connection with acquisitions, these adjustments could have a material impact on its financial condition and results of operations. Significant estimates and assumptions in estimating the fair value of acquired patents, customer lists, trademarks, proprietary technology, and other identifiable intangible assets include future cash flows that the Company expects to generate from the acquired assets, discount rate, customer attrition rate, and long-term revenue growth projections. Projecting discounted future cash flows requires the Company to make significant estimates regarding projected revenues, projected earnings before interest, taxes, depreciation, and amortization margins, discount rates and customer attrition rates. If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, the Company could record impairment charges. In addition, the Company has estimated the economic lives of certain acquired assets, and these lives are used to calculate depreciation on property, plant and equipment and amortization expense on definite-lived intangible assets. If the estimates of the economic lives change, depreciation or amortization expenses could be increased or decreased, or the acquired assets could be impaired. For leases acquired in a business combination, the Company measures the lease liability at the present value of the remaining lease payments, as if the acquired lease were a new lease of the Company at the acquisition date. The Company measures the right-of-use asset at the same amount as the lease liability as adjusted to reflect favorable or unfavorable terms of the lease when compared with market terms. Reportable segments The Company identifies its reportable segments by evaluating the level of detail reviewed by the chief operating decision maker and the similarities among operating segments related to gross profit margins, nature of products sold, nature of the production processes, type and class of customer, methods used to distribute products, and nature of the regulatory environment. Of these factors, the Company believes that the most significant in determining the aggregation of operating segments are the nature of the products and the type of customers served. The Company’s operating and reporting structure consists of two reportable segments, Consumer Packaging and Industrial Paper Packaging, with all remaining businesses reported as All Other. Contingencies Pursuant to U.S. GAAP for accounting for contingencies, accruals for estimated losses are recorded at the time information becomes available indicating that losses are probable and that the amounts are reasonably estimable. Amounts so accrued are not discounted. Changes in estimates and assumptions could impact the carrying value of the accruals from one period to another as additional information becomes known. Foreign currency translation

New accounting pronouncements

New accounting pronouncements	12 Months Ended
	Dec. 31, 2023
Accounting Changes and Error Corrections [Abstract]
New accounting pronouncements	New accounting pronouncements In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures”, which modifies the rules on income tax disclosures to require disaggregated information about a reporting entity’s effective tax rate reconciliation as well as information on income taxes paid. The standard is intended to benefit investors by providing more detailed income tax disclosures that would be useful in making capital allocation decisions. The guidance is effective for annual periods beginning after December 15, 2024, with early adoption permitted. ASU 2023-09 should be applied on a prospective basis, but retrospective application is permitted. The Company is currently evaluating the potential impact of adopting this new guidance on our consolidated financial statements and related disclosures. In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures”, which is intended to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The purpose of the amendment is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. The guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The guidance is to be applied retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the potential impact of adopting this new guidance on our consolidated financial statements and related disclosures. In September 2022, the FASB issued ASU 2022-04 “Liabilities—Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations.” The amendments in this update require that a buyer in a supplier finance program disclose qualitative and quantitative information about its supplier finance programs in each annual reporting period, including a description of key payment terms, and a rollforward of the outstanding obligation as of the end of the annual period. The amendments are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. The Company adopted this standard in the first quarter of 2023, with the exception of the amendment on rollforward information, which will be adopted in the first quarter of 2024. The adoption of the new standard did not have a material effect on the consolidated financial statements. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” The amendments in this update eliminate the accounting guidance for troubled debt restructurings while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. The amendments also require that an entity disclose current-period gross write offs by year of origination for financing receivables and net investments in leases. The amendments in ASU 2022-02 were effective for the Company as of January 1, 2023, and their adoption did not have a material effect on the consolidated financial statements. In October 2021, the FASB issued ASU 2021-08, “Business Combinations: Accounting for Contract Assets and Contract Liabilities.” The amendments in this Update primarily require that the acquirer recognize and measure contract assets and contract liabilities acquired in a business combination as if the acquirer had originated the related revenue contracts rather than at fair value as of the acquisition date. Generally, this would result in an acquirer recognizing and measuring the acquired contract assets and contract liabilities consistent with how they were recognized and measured in the acquiree's financial statements in accordance with GAAP. The amendments in this ASU are effective on a prospective basis for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. The adoption of this ASU did not materially affect the Company’s consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, “Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 provided temporary optional expedients and exceptions to applying U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate (“SOFR”). In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform,” to clarify that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The sunset accounting standard provision associated with ASU 2020-04 was originally set for December 31, 2022; however, in December 2022, the FASB issued ASU 2022-06, “Reference Rate Reform: Deferral of the Sunset Date of Topic 848,” which defers the sunset date of Topic 848 from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848.This pronouncement, which was effective as of its December 31, 2022 issuance date, did not have a material impact on the Company's consolidated financial statements. The Company does not expect that the market transition of LIBOR to SOFR will have a material impact on its consolidated financial statements.

Acquisitions and divestitures

Acquisitions and divestitures	12 Months Ended
	Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract]
Acquisitions and divestitures	Acquisitions and divestitures Acquisitions On December 1, 2023, the Company completed the acquisition of Inapel Embalagens Ltda., (“Inapel”), a manufacturer of single and multilayer materials for flexible packaging in Brazil for a net cash purchase price of $59,228, subject to customary working capital adjustments. With the acquisition of Inapel, the Company added approximately 500 employees and two manufacturing locations in the Sao Paulo region of Brazil. The financial results of Inapel are included in the Company’s Consumer Packaging segment. On September 8, 2023, the Company completed the acquisition of the remaining 65% interest in RTS Packaging from joint venture partner WestRock and the acquisition of a paper mill in Chattanooga, Tennessee (the “Chattanooga Mill”) from WestRock for net cash consideration of $313,388. In December 2023, the Company agreed to a final working capital settlement of $452, which was paid to WestRock in January 2024. This working capital settlement is reflected in “Accrued expenses and other” in the Company’s Consolidated Balance Sheets as of December 31, 2023. Prior to completing the acquisitions, the Company held a 35% ownership interest in the RTS Packaging joint venture which was formed in 1997 and combined the former protective packaging operations of WestRock and Sonoco to market recycled paperboard to glass container manufacturers and producers of wine, liquor, food, and pharmaceuticals. With the acquisition of the remaining interest in RTS Packaging and the acquisition of the Chattanooga Mill, the Company added approximately 1,100 employees and fourteen converting operations, including ten in the United States, two in Mexico, and two in South America, and one paper mill in the United States. The Company funded the acquisitions with borrowings under a new term loan credit facility and cash on hand. See Note 10 for more information. The financial results of RTS Packaging and the Chattanooga Mill are included in the Company’s Industrial Paper Packaging segment. On September 8, 2023, the fair value of the Company’s 35% interest in RTS Packaging was determined to be $59,472 based on the fair value of the remaining 65% equity interest in RTS Packaging adjusted for the deemed payment of a control premium, and the carrying value of the 35% interest was $8,654. The Company recognized a gain of $50,818 resulting from this remeasurement to fair value and the reclassification of certain amounts related to the Company’s 35% interest out of “Accumulated other comprehensive loss,” included foreign currency translation losses of $2,033 and losses related to defined benefit pension plans of $4,756. The Company also recognized a loss of $4,372 on the settlement of a contract with unfavorable terms at the time of the acquisition. The combined net gain of $39,657 is reflected in “Other income, net” in the Company’s Consolidated Statements of Income for the year ended December 31, 2023. The following table provides a summary of the purchase consideration (as defined under ASC 805) transferred for the acquisition of the remaining interest in RTS Packaging and the acquisition of the Chattanooga Mill: Purchase Consideration Cash consideration, net of cash acquired $ 313,388 Fair value of previously held interest in RTS Packaging 59,472 Final working capital settlement 452 Settlement of preexisting relationships 1,235 Purchase consideration transferred $ 374,547 The Company’s preliminary fair values of the assets acquired and liabilities assumed in the acquisition of the remaining interest in RTS Packaging, and the Chattanooga Mill, and Inapel acquisitions, as well as revised preliminary fair values reflecting adjustments made during the measurement period for RTS Packaging and the Chattanooga Mill, are as follows: RTS and Chattanooga Mill Inapel Initial Allocation Measurement Period Adjustments Preliminary Allocation Preliminary Allocation Trade accounts receivable $ 17,488 $ — $ 17,488 $ 30,301 Other receivables — — — 6,088 Inventories 20,209 (947) 19,262 9,269 Prepaid expenses 2,720 (589) 2,131 1,430 Property, plant and equipment 73,483 753 74,236 11,456 Right of use asset - operating leases 34,604 290 34,894 217 Other intangible assets 199,560 (8,995) 190,565 8,653 Goodwill 92,657 14,909 107,566 15,704 Other assets 2,465 (412) 2,053 793 Payable to suppliers (7,320) — (7,320) (15,899) Accrued expenses and other (12,436) (25) (12,461) (4,606) Accrued wages and other compensation (2,731) — (2,731) (1,127) Notes payable and current portion of long-term debt (24) — (24) — Noncurrent operating lease liabilities (29,905) — (29,905) (117) Pension and other postretirement benefits (10,761) (768) (11,529) — Long-term debt (1,942) — (1,942) — Deferred income taxes (3,419) (2,502) (5,921) (2,934) Other long-term liabilities (3,293) 1,478 (1,815) — Net assets acquired $ 371,355 $ 3,192 $ 374,547 $ 59,228 The preliminary allocations of the purchase price of the remaining interest in RTS Packaging, the Chattanooga Mill, and Inapel to the tangible and intangible assets acquired and liabilities assumed, as reflected in the table above, are based on the Company’s preliminary allocations of their respective fair values, based on information currently available. Management is continuing to finalize its valuation of certain assets and liabilities including, but not limited to: inventory; property, plant and equipment; goodwill; other intangible assets; and deferred income taxes, and expects to complete its valuations within one year of the respective dates of acquisition. Goodwill for RTS Packaging and the Chattanooga Mill, of which $87,191 is expected to be deductible for income tax purposes, consists of increased manufacturing capacity, access to certain markets, and the capability to support marquee customers in growing markets. Goodwill for Inapel, none of which is expected to be deductible for income tax purposes, consists of the ability to grow and improve the Company’s existing flexible packaging operation in Brazil. The Company has accounted for these acquisitions as business combinations under the acquisition method and has included the results of operations of the acquired businesses in the Company’s Consolidated Statements of Income from their respective dates of acquisition. The Company completed three acquisitions during 2022 at a net cash cost of $1,444,618. On November 15, 2022, the Company completed the acquisition of S.P. Holding, Skjern A/S (“Skjern”), a privately owned manufacturer of paper based in Skjern, Denmark for $89,610, net of cash acquired. Tangible assets totaled $40,489, intangible assets totaled $39,330, liabilities totaled $22,403, and Goodwill totaled $32,194. Skjern produces high-grade paperboard from recycled paper for rigid paper containers, tubes and cores, and other applications. On August 31, 2022, the Company completed the acquisition of Nordeste Tubetes and NE Tubetes (collectively “Nordeste”), two small tube and core operations in Brazil. Total consideration for the two businesses was $6,419. Tangible assets totaled $1,374, intangible assets totaled $3,031, and Goodwill totaled $2,014. The Company paid $3,933 at closing and recorded a deferred payment obligation totaling $2,486 in “Other liabilities” on the Company’s Consolidated Balance Sheets. The deferred payment obligation is expected to be paid by the end of 2028. On January 26, 2022, the Company completed the acquisition of Ball Metalpack Holding, LLC (“Ball Metalpack”), renamed Sonoco Metal Packaging (“Metal Packaging”), a leading supplier of sustainable metal packaging for food and household products and the largest aerosol can producer in North America, for $1,348,589, net of cash acquired. Prior to the Company's acquisition, Ball Metalpack was a joint venture formed in 2018 and owned by Platinum Equity (51%) and Ball Corporation (49%). Metal Packaging consists of eight manufacturing plants in the United States and a headquarters facility in Broomfield, Colorado. Factors comprising goodwill at Metal Packaging include increased access to certain markets as well as the value of the assembled workforce. During 2023, the Company finalized its valuations of the assets acquired and the liabilities assumed in the Metal Packaging, Skjern, and Nordeste acquisitions. As a result, the following measurement period adjustments were made to the previously disclosed preliminary fair values of assets acquired and liabilities assumed during the year ended December 31, 2023. Measurement Period Adjustments for the year ended December 31, 2023 Metal Packaging Skjern Nordeste Other receivables $ — $ — $ (186) Inventories (73) 14 (38) Property, plant and equipment (247) 4,921 494 Other intangible assets — (3,488) 3,031 Goodwill 439 3,135 (3,400) Accrued expenses and other (119) (203) — Taxes Payable — (3,416) — Additional cash consideration $ — $ 963 $ (99) The Company accounted for all 2022 acquisitions as business combinations under the acquisition method and has included the results of operations of the acquired businesses in the Company’s Consolidated Statements of Income from the respective dates of acquisition. Financial results for Metal Packaging are included in the Company’s Consumer Packaging Segment, and financial results for Nordeste and Skjern are included in the Industrial Paper Packaging segment. Except for the Metal Packaging acquisition, the Company does not believe that the results of the businesses acquired in 2023, 2022, and 2021 were material to the years presented, individually or in the aggregate, and are therefore not subject to the requirements to provide supplemental pro-forma information. The following table presents the financial results for Metal Packaging from the date of acquisition through December 31, 2022: Supplemental Information January 26 to Metal Packaging December 31, 2022 Net sales $ 1,035,020 Net income $ 62,777 The following table presents the Company’s pro forma consolidated results for the years ended December 31, 2022 and December 31, 2021, assuming the acquisition of Metal Packaging had occurred on January 1, 2021. This pro forma information is presented for informational purposes only and does not purport to represent the results of operations that would have been achieved if the acquisition had been completed at the beginning of 2021, nor is it necessarily indicative of future consolidated results. Pro Forma Supplemental Information Years Ended Consolidated December 31, 2022 December 31, 2021 Net sales $ 7,300,140 $ 6,425,771 Net income/(loss) attributable to Sonoco $ 528,818 $ (145,570) The pro forma information above does not project the Company’s expected results for any future period and gives no effect to any future synergistic benefits that may result from the combination or the costs of integrating the acquired operations with those of the Company. Pro forma information for the years ended December 31, 2022 and December 31, 2021 includes adjustments to depreciation, amortization, and income taxes based upon the final fair value allocation of the purchase price to Metal Packaging’s tangible and intangible assets acquired and liabilities assumed as though the acquisition had occurred on January 1, 2021. Interest expense on the additional debt issued by the Company to fund the acquisition and retention bonuses incurred related to the acquisition are also included in the pro forma information as if the acquisition had occurred on January 1, 2021. Acquisition-related costs of $28,171 and charges related to fair value adjustments to acquisition-date inventory of $33,155 were recognized during 2022. These costs are excluded from 2022 pro forma net income and are instead reflected in 2021 pro forma net income as though the acquisition had occurred on January 1, 2021. The Company completed four acquisitions during 2021 at a net cash cost of $20,697. On December 30, 2021, the Company completed the acquisition of a recycling facility from American Recycling of Western North Carolina, LLC, a privately held company, for total cash consideration of $6,267. The facility, located in Asheville, North Carolina, primarily services western North Carolina and upstate South Carolina for the processing of recycled materials. On November 8, 2021, the Company completed the acquisition of D&W Paper Tube Inc., a privately owned manufacturer of paper tubes and cardboard cores, serving the carpet and textile industries and consisting of two manufacturing facilities in Chatsworth, Georgia, for total cash consideration of $12,787. The Company also completed two smaller acquisitions earlier in 2021. These included Allied Packaging on August 3, 2021, a manufacturer of paper packaging and related manufacturing equipment, consisting of a single manufacturing facility in Sydney, Australia, for total cash consideration of $802, and TuboTec on March 8, 2021, a small tube and core operation in Brazil, for total cash consideration of $841. The financial results for each of these acquisitions are included in the Company’s Industrial Paper Packaging segment from the respective date acquired. Divestiture of Businesses On July 1, 2023, the Company completed the sale of its U.S. BulkSak business, which consisted of the manufacturing and distribution of flexible intermediate bulk containers, plastic and fiber pallets, and custom fit liners and was a part of the Company’s Industrial Paper Packaging segment, to U.S. BulkSak Holdings, LLC. The cash selling price, as adjusted for the final working capital settlement, was $20,271 with cash proceeds totaling $18,271 received in 2023, and the remaining $2,000 held in escrow to be released to the Company within 18 months from the date of the sale, pursuant to the settlement of any indemnity claims. As a result of the U.S. BulkSak divestiture, the Company wrote off net assets totaling $13,437, including $3,333 of allocated goodwill, and recognized a pretax gain of $6,834 which is included in “Gain/(Loss) on divestiture of business and other assets” in the Company’s Consolidated Statements of Income. The escrow balance of $2,000 is reflected as a long-term receivable in “Other assets” on the Company’s Consolidated Balance Sheets as of December 31, 2023. Also on July 1, 2023, the Company agreed to the sale of its Mexico BulkSak business. The sale closed in December 2023 for a cash selling price, as adjusted for working capital, of $1,096. As a result of the Mexico BulkSak sale, the Company recognized a pretax gain of $85 which is included in “Gain/(Loss) on divestiture of business and other assets” in the Company’s Consolidated Statements of Income. On January 26, 2023, the Company completed the sale of its S3 business, a provider of customized waste and recycling management programs and part of the Company’s Industrial Paper Packaging segment, to Northstar, for total cash proceeds of $13,839. An additional $1,500 of proceeds are being held in escrow and will be released to the Company, pursuant to any indemnification claims, twenty months following the date of the divestiture. The Company wrote off net assets totaling $4,274 as part of the divestiture of the business, including $3,042 of allocated goodwill, and recognized a pretax gain of $11,065 during the first quarter of 2023, which is included in “Gain/(Loss) on divestiture of business and other assets” in the Company’s Consolidated Statements of Income. The escrow balance is reflected as a long-term receivable in “Other assets” on the Company’s Consolidated Balance Sheets as of December 31, 2023. The Company is also entitled to receive additional proceeds of $3,200 in the second quarter of 2024 if certain conditions are met. This contingent consideration will be recognized as an additional gain on the sale at the point the contingencies are resolved. On January 26, 2023, in connection with the sale of the S3 business, the Company acquired a 2.7% equity interest in Northstar valued at $5,000. This investment is being accounted for under the measurement alternative (i.e., cost less impairment, adjusted for any qualifying observable price changes). The divestitures of the S3 and BulkSak businesses did not represent a strategic shift for the Company or have a major effect on its operations or financial results. Consequently, these sales did not meet the criteria for reporting as discontinued operations. The cash proceeds from the sales were used for general corporate purposes. On April 4, 2021, the Company completed the sale of its U.S. display and packaging business, part of the All Other group of businesses, to Hood Container Corporation. This business provided design, manufacturing and fulfillment of point-of-purchase displays, as well as contract packaging services, for consumer product customers and had approximately 450 employees across eight manufacturing and fulfillment facilities and four sales and design centers. The Company received net cash proceeds of $81,675 from the sale, wrote off net assets totaling $84,434, and recognized a loss on the divestiture of $2,759, before tax. On September 30, 2021, the Company completed the sale of its Plastics-Food thermoforming operation in Wilson, North Carolina to Placon for net cash proceeds of $3,528, resulting in the recognition of a gain on the sale of $92, before tax. These 2021 divestitures did not meet the criteria for reporting as discontinued operations. The Company continually assesses its operational footprint as well as its overall portfolio of businesses and may consider the divestiture of plants and/or business units it considers to be suboptimal or nonstrategic. Sale of Assets With the completion of Project Horizon, the Company’s project to convert the corrugated medium machine in Hartsville, South Carolina, to produce uncoated recycled paperboard was realized. The Company now produces paper exclusively from recycled fibers and no longer requires natural tree fiber for production. Accordingly, on March 29, 2023, the Company sold its timberland properties, consisting of approximately 55,000 acres, to Manulife Investment Management for net cash proceeds of $70,802. The Company disposed of assets with a net book value of $9,857 as part of the sale, and recognized a pretax gain from the sale of these assets of $60,945 during the year ended December 31, 2023, which is included in “ Gain/(Loss) on divestiture of business and other assets Acquisition, Integration, and Divestiture-Related Costs Acquisition, integration, and divestiture-related costs of $26,254, $70,210, and $17,722 were incurred in 2023, 2022 and 2021, respectively. These costs include legal and professional fees, investment banking fees, representation and warranty insurance premiums, as well as employee-related and other integration activity costs, that are included in “Selling, general, and administrative expenses” in the Company’s Consolidated Statements of Income. The costs incurred in 2023 and 2022 also include fair value adjustments to acquisition-date inventory totaling $5,227 and $33,155, respectively, that are included in “Cost of sales” in the Company’s Consolidated Statements of Income.

Restructuring and asset impairm

Restructuring and asset impairment	12 Months Ended
	Dec. 31, 2023
Restructuring and Related Activities [Abstract]
Restructuring and asset impairment	Restructuring and asset impairment Due to its geographic footprint and the cost-competitive nature of its businesses, the Company is continually seeking more cost-effective means and structures to serve its customers and to respond to fundamental changes in its markets. As such, restructuring costs have been, and are expected to be, a recurring component of the Company’s operating costs. The amount of these costs can vary significantly from quarter to quarter and from year to year depending upon the scope, nature, and location of the restructuring activities. Following are the total restructuring and asset impairment charges, net of adjustments, recognized during the periods presented: Year Ended December 31, 2023 2022 2021 Restructuring and restructuring-related asset impairment charges $ 56,933 $ 46,815 $ 9,176 Other asset impairments — 10,095 5,034 Restructuring/Asset impairment charges $ 56,933 $ 56,910 $ 14,210 The table below sets forth restructuring and restructuring-related asset impairment charges by type incurred: Year Ended December 31, 2023 2022 2021 Severance and Termination Benefits $ 26,631 $ 17,983 $ 13,097 Asset Impairment/Disposal of Assets 19,603 9,442 (9,116) Other Costs 10,699 19,390 5,195 Total restructuring and restructuring-related asset impairment charges $ 56,933 $ 46,815 $ 9,176 The table below sets forth restructuring and restructuring-related asset impairment charges by reportable segment: Year Ended December 31, 2023 2022 2021 Consumer Packaging $ 8,059 $ 12,433 $ 3,427 Industrial Paper Packaging 38,754 16,019 (1,642) All Other 7,623 (166) 2,969 Corporate 2,497 18,529 4,422 Total restructuring and restructuring-related asset impairment charges $ 56,933 $ 46,815 $ 9,176 “Restructuring and restructuring-related asset impairment charges” and “Other asset impairments” are included in “Restructuring/Asset impairment charges” in the Consolidated Statements of Income. The following table sets forth the activity in the restructuring accrual included in “Accrued expenses and other” on the Company’s Consolidated Balance Sheets: Accrual Activity Severance and Termination Benefits Asset Impairment/ Disposal of Assets Other Costs Total Liability, December 31, 2021 $ 10,917 $ — $ 1,873 $ 12,790 2022 charges 17,983 9,442 19,390 46,815 Cash (payments)/receipts (14,024) 7,138 (19,836) (26,722) Asset write downs/disposals — (16,580) — (16,580) Foreign currency translation (199) — (35) (234) Liability, December 31, 2022 $ 14,677 $ — $ 1,392 $ 16,069 2023 charges 26,631 19,603 10,699 56,933 Cash (payments)/receipts (27,000) 6,842 (10,522) (30,680) Asset write downs/disposals — (26,445) — (26,445) Foreign currency translation 7 — 69 76 Liability, December 31, 2023 $ 14,315 $ — $ 1,638 $ 15,953 “Severance and Termination Benefits” in 2023 include the cost of severance for approximately 300 employees whose positions were eliminated in conjunction with the Company’s ongoing organizational effectiveness efforts a nd severance related to the following plant closures: paper mills in Hutchinson, Kansas and Indonesia, part of the Industrial Paper Packaging segment; a metal packaging facility and a perimeter-of-the-store facility in the United States, both part of the Consumer Packaging segment; medical plastics facilities in the United States and United Kingdom, part of the All Other group of businesses; and severance related to the closures of several smaller operations. “Severance and Termination Benefits” in 2022 include the cost of severance provided to employees terminated as the result of various plant closures, and for approximately 180 employees whose positions were eliminated in conjunction with the Company's ongoing organizational effectiveness efforts. “Asset Impairment/Disposal of Assets” in 2023 consist primarily of asset impairment charges related to the closure of a paper mill in Hutchinson, Kansas and a metal packaging facility in the United States, and medical plastics facilities in the United States and United Kingdom. These charges were partially offset by gains from the sale of previously impaired assets and a closed perimeter-of-the-store facility, part of the Consumer Packaging segment. “Asset Impairment/Disposal of Assets” in 2022 consist primarily of asset impairment charges related to plant closures in the Industrial Paper Packaging and Consumer Packaging segments, including asset impairment charges of $3,620 related to Project Horizon. These charges were partially offset by gains from the sale of previously impaired assets and closed facilities in the Consumer Packaging segment and the “All Other” group of businesses. Cash proceeds in 2022 relate to the sales of these assets and facilities, including the partial sale of a previously closed paper mill in Canada, part of the Industrial Paper Packaging segment. “Other Costs” in 2023 consist primarily of costs related to plant closures including equipment removal, utilities, plant security, property taxes and insurance. In 2022, “Other Costs” consist primarily of consulting services and costs related to plant closures including equipment removal, utilities, plant security, property taxes and insurance. The Company expects to pay the majority of the remaining restructuring reserves by the end of 2024 using cash generated from operations. The Company also expects to recognize future additional charges totaling approximately $2,300 in connection with ongoing consulting services and previously announced restructuring actions and believes that the majority of these charges will be incurred and paid by the end of 2024. The Company continually evaluates its cost structure, including its manufacturing capacity, and additional restructuring actions are likely to be undertaken. Other Asset Impairments The Company recognized other asset impairment charges totaling $10,095 for the year ended December 31, 2022. As a result of exiting our operations in Russia, consisting of two small tube and core plants in the Industrial Paper Packaging segment, other asset impairment charges of $9,165 were recognized for the year ended December 31, 2022. These charges include $3,747 of cumulative translation adjustment losses that were reclassified from accumulated other comprehensive income upon completion of the Company's exit from Russia on July 1, 2022. Total other asset impairment charges for the year ended December 31, 2022 also include $930 of fixed asset impairments in the Company’s plastics foods operations, part of the Consumer Packaging segment. These assets were determined to be impaired as the value of their projected undiscounted cash flows was no longer sufficient to recover their carrying value. These impairment charges are included in “Restructuring/Asset impairment charges” in the Company’s Consolidated Statements of Income.

Book cash overdrafts and cash p

Book cash overdrafts and cash pooling	12 Months Ended
	Dec. 31, 2023
Cash and Cash Equivalents [Abstract]
Book cash overdrafts and cash pooling	Book cash overdrafts and cash pooling As part of its cash management system, the Company uses “zero balance” accounts to fund disbursements. Under this system, the bank balance is zero at the end of each day, while the book balance is usually a negative amount due to reconciling items such as outstanding checks. At December 31, 2023 and 2022, outstanding checks totaling $24,638 and $17,986, respectively, were included in “Payable to suppliers” on the Company’s Consolidated Balance Sheets. In addition, outstanding payroll checks of $0 and $244 as of December 31, 2023 and 2022, respectively, were included in “Accrued wages and other compensation” on the Company’s Consolidated Balance Sheets. Changes in these book cash overdrafts are reported as cash flows from financing activities. The Company uses a notional pooling arrangement with an international bank to help manage global liquidity requirements. Under this pooling arrangement, the Company and its participating subsidiaries may maintain either cash deposit or borrowing positions through local currency accounts with the bank, so long as the aggregate position of the global pool is a notionally calculated net cash deposit. Because it maintains a security interest in the cash deposits, and has the right to offset the cash deposits against the borrowings, the bank provides the Company and its participating subsidiaries favorable interest terms on both. The Company’s Consolidated Balance Sheets reflect a net cash deposit under this pooling arrangement of $1,308 and $2,375 as of December 31, 2023 and 2022, respectively.

Property, plant and equipment

Property, plant and equipment	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Property, plant and equipment	Property, plant and equipment Details of the Company’s property, plant and equipment at December 31 are as follows: 2023 2022 Land $ 135,518 $ 131,362 Timber resources — 42,202 Buildings 740,138 664,012 Machinery and equipment 3,825,134 3,528,545 Construction in progress 269,061 226,701 4,969,851 4,592,822 Accumulated depreciation and depletion (3,063,714) (2,882,423) Property, plant and equipment, net $ 1,906,137 $ 1,710,399 Depreciation and depletion expense amounted to $240,614 in 2023, $216,138 in 2022 and $189,667 in 2021.

Leases

Leases	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Leases	Leases The Company routinely enters into leasing arrangements for real estate (including manufacturing facilities, office space, and warehouses), transportation equipment (automobiles, forklifts, and trailers), and office equipment (copiers and postage machines). The assessment of the certainty associated with the exercise of various lease renewal, termination, and purchase options included in the Company’s lease contracts is performed after contemplating all the relevant facts and circumstances in accordance with guidance under ASC 842, “Leases.” Most real estate leases, in particular, include one or more options to renew, with renewal terms that typically extend the lease term in increments from one five The Company completed the acquisition of the remaining interest in RTS Packaging and the acquisition of the Chattanooga Mill on September 8, 2023. The acquisition included operating lease liabilities of $34,604 with a weighted-average remaining lease maturity term and discount rate of 11.5 years and 6.4%, respectively. The Company completed the acquisition of Metal Packaging on January 26, 2022. The acquisition involved the assumption of operating and finance lease assets and liabilities. The acquired operating lease liabilities of $33,910 had a weighted-average remaining lease maturity term and discount rate of 11.0 years and 2.8%, respectively, and the acquired finance lease liabilities of $46,687 had a weighted-average remaining lease maturity term and discount rate of 3.8 years and 7.5%, respectively, as of the date of acquisition. For additional information about these acquisitions, please see Note 3. The following table sets forth the balance sheet location and values of the Company’s lease assets and lease liabilities at December 31, 2023 and December 31, 2022: Classification Balance Sheet Location December 31, 2023 December 31, 2022 Lease Assets Operating lease assets Right of Use Asset - Operating Leases $ 314,944 $ 296,781 Finance lease assets Other Assets 94,026 103,467 Total lease assets $ 408,970 $ 400,248 Lease Liabilities Current operating lease liabilities Accrued expenses and other $ 54,803 $ 52,306 Current finance lease liabilities Notes payable and current portion of long-term debt 18,791 19,015 Total current lease liabilities 73,594 71,321 Noncurrent operating lease liabilities Noncurrent Operating Lease Liabilities 265,454 250,994 Noncurrent finance lease liabilities Long-term Debt, net of current portion 70,203 83,905 Total noncurrent lease liabilities 335,657 334,899 Total lease liabilities $ 409,251 $ 406,220 Certain of the Company’s leases include variable costs. Variable costs include lease payments that were volume or usage-driven in accordance with the use of the underlying asset, and also non-lease components that were incurred based upon actual terms rather than contractually fixed amounts. In addition, variable costs are incurred for lease payments that are indexed to a change in rate or index. Because the right of use asset recorded on the balance sheet was determined based upon factors considered at the commencement date, subsequent changes in the rate or index that were not contemplated in the right of use asset balances recorded on the balance sheet result in variable expenses being incurred when paid during the lease term. The following table sets forth the components of the Company’s total lease cost for the years ended December 31, 2023, 2022, and 2021: Lease Cost 2023 2022 2021 Operating lease cost (a) $ 54,990 $ 51,890 $ 48,158 Finance lease cost: Amortization of lease asset (a) (b) 13,110 12,241 5,747 Interest on lease liabilities (c) 4,447 4,751 1,384 Variable lease cost (a) (d) 40,983 30,269 26,198 Impairment charges (e) — 293 148 Total lease cost $ 113,530 $ 99,444 $ 81,635 (a) Production-related and administrative amounts are included in cost of sales and selling, general and administrative expenses, respectively. (b) Included in depreciation and amortization. (c) Included in interest expense. (d) Also includes short-term lease costs, which are deemed immaterial. (e) Impairment charges are included in “Restructuring/asset impairment charges” in the Company’s Consolidated Statements of Income. See Note 4 for more information. The following table sets forth the five-year maturity schedule of the Company’s lease liabilities as of December 31, 2023: Maturity of Lease Liabilities Operating Leases Finance Leases Total 2024 $ 55,688 $ 19,163 $ 74,851 2025 48,400 21,186 69,586 2026 38,379 16,727 55,106 2027 34,125 4,791 38,916 2028 31,329 4,277 35,606 Beyond 2028 198,533 38,922 237,455 Total lease payments 406,454 105,066 511,520 Less: Interest 86,197 16,072 102,269 Lease Liabilities $ 320,257 $ 88,994 $ 409,251 The following tables set forth the Company’s weighted average remaining lease term and discount rates used in the calculation of its outstanding lease liabilities at December 31, 2023, 2022, and 2021, along with other lease-related information for the years ended December 31, 2023, 2022, and 2021: Lease Term and Discount Rate 2023 2022 2021 Weighted-average remaining lease term (years): Operating leases 10.7 11.2 11.8 Finance leases 8.8 9.2 13.5 Weighted-average discount rate: Operating leases 4.97% 4.27% 4.09% Finance leases 4.89% 4.79% 2.86% Other Information 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows used by operating leases $ 54,877 $ 52,198 $ 50,479 Operating cash flows used by finance leases $ 4,447 $ 4,751 $ 1,384 Financing cash flows used by finance leases $ 15,559 $ 12,687 $ 4,699 Leased assets obtained in exchange for new operating lease liabilities $ 33,059 $ 36,158 $ 20,505 Leased assets obtained in exchange for new finance lease liabilities $ 8,354 $ 10,091 $ 14,643 Modification to leased assets for increase in operating lease liabilities $ 2,938 $ 2,807 $ 15,936 Modification to leased assets for increase/(decrease) in finance lease liabilities $ 18 $ (642) $ 9,586 Termination reclasses to decrease operating lease assets $ (15,314) $ (4,285) $ (5,267) Termination reclasses to decrease operating lease liabilities $ (16,169) $ (4,537) $ (5,602) Termination reclasses to decrease finance lease assets $ (4,564) $ (1,351) $ (125) Termination reclasses to decrease finance lease liabilities $ (6,462) $ (87) $ (130)
Leases	Leases The Company routinely enters into leasing arrangements for real estate (including manufacturing facilities, office space, and warehouses), transportation equipment (automobiles, forklifts, and trailers), and office equipment (copiers and postage machines). The assessment of the certainty associated with the exercise of various lease renewal, termination, and purchase options included in the Company’s lease contracts is performed after contemplating all the relevant facts and circumstances in accordance with guidance under ASC 842, “Leases.” Most real estate leases, in particular, include one or more options to renew, with renewal terms that typically extend the lease term in increments from one five The Company completed the acquisition of the remaining interest in RTS Packaging and the acquisition of the Chattanooga Mill on September 8, 2023. The acquisition included operating lease liabilities of $34,604 with a weighted-average remaining lease maturity term and discount rate of 11.5 years and 6.4%, respectively. The Company completed the acquisition of Metal Packaging on January 26, 2022. The acquisition involved the assumption of operating and finance lease assets and liabilities. The acquired operating lease liabilities of $33,910 had a weighted-average remaining lease maturity term and discount rate of 11.0 years and 2.8%, respectively, and the acquired finance lease liabilities of $46,687 had a weighted-average remaining lease maturity term and discount rate of 3.8 years and 7.5%, respectively, as of the date of acquisition. For additional information about these acquisitions, please see Note 3. The following table sets forth the balance sheet location and values of the Company’s lease assets and lease liabilities at December 31, 2023 and December 31, 2022: Classification Balance Sheet Location December 31, 2023 December 31, 2022 Lease Assets Operating lease assets Right of Use Asset - Operating Leases $ 314,944 $ 296,781 Finance lease assets Other Assets 94,026 103,467 Total lease assets $ 408,970 $ 400,248 Lease Liabilities Current operating lease liabilities Accrued expenses and other $ 54,803 $ 52,306 Current finance lease liabilities Notes payable and current portion of long-term debt 18,791 19,015 Total current lease liabilities 73,594 71,321 Noncurrent operating lease liabilities Noncurrent Operating Lease Liabilities 265,454 250,994 Noncurrent finance lease liabilities Long-term Debt, net of current portion 70,203 83,905 Total noncurrent lease liabilities 335,657 334,899 Total lease liabilities $ 409,251 $ 406,220 Certain of the Company’s leases include variable costs. Variable costs include lease payments that were volume or usage-driven in accordance with the use of the underlying asset, and also non-lease components that were incurred based upon actual terms rather than contractually fixed amounts. In addition, variable costs are incurred for lease payments that are indexed to a change in rate or index. Because the right of use asset recorded on the balance sheet was determined based upon factors considered at the commencement date, subsequent changes in the rate or index that were not contemplated in the right of use asset balances recorded on the balance sheet result in variable expenses being incurred when paid during the lease term. The following table sets forth the components of the Company’s total lease cost for the years ended December 31, 2023, 2022, and 2021: Lease Cost 2023 2022 2021 Operating lease cost (a) $ 54,990 $ 51,890 $ 48,158 Finance lease cost: Amortization of lease asset (a) (b) 13,110 12,241 5,747 Interest on lease liabilities (c) 4,447 4,751 1,384 Variable lease cost (a) (d) 40,983 30,269 26,198 Impairment charges (e) — 293 148 Total lease cost $ 113,530 $ 99,444 $ 81,635 (a) Production-related and administrative amounts are included in cost of sales and selling, general and administrative expenses, respectively. (b) Included in depreciation and amortization. (c) Included in interest expense. (d) Also includes short-term lease costs, which are deemed immaterial. (e) Impairment charges are included in “Restructuring/asset impairment charges” in the Company’s Consolidated Statements of Income. See Note 4 for more information. The following table sets forth the five-year maturity schedule of the Company’s lease liabilities as of December 31, 2023: Maturity of Lease Liabilities Operating Leases Finance Leases Total 2024 $ 55,688 $ 19,163 $ 74,851 2025 48,400 21,186 69,586 2026 38,379 16,727 55,106 2027 34,125 4,791 38,916 2028 31,329 4,277 35,606 Beyond 2028 198,533 38,922 237,455 Total lease payments 406,454 105,066 511,520 Less: Interest 86,197 16,072 102,269 Lease Liabilities $ 320,257 $ 88,994 $ 409,251 The following tables set forth the Company’s weighted average remaining lease term and discount rates used in the calculation of its outstanding lease liabilities at December 31, 2023, 2022, and 2021, along with other lease-related information for the years ended December 31, 2023, 2022, and 2021: Lease Term and Discount Rate 2023 2022 2021 Weighted-average remaining lease term (years): Operating leases 10.7 11.2 11.8 Finance leases 8.8 9.2 13.5 Weighted-average discount rate: Operating leases 4.97% 4.27% 4.09% Finance leases 4.89% 4.79% 2.86% Other Information 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows used by operating leases $ 54,877 $ 52,198 $ 50,479 Operating cash flows used by finance leases $ 4,447 $ 4,751 $ 1,384 Financing cash flows used by finance leases $ 15,559 $ 12,687 $ 4,699 Leased assets obtained in exchange for new operating lease liabilities $ 33,059 $ 36,158 $ 20,505 Leased assets obtained in exchange for new finance lease liabilities $ 8,354 $ 10,091 $ 14,643 Modification to leased assets for increase in operating lease liabilities $ 2,938 $ 2,807 $ 15,936 Modification to leased assets for increase/(decrease) in finance lease liabilities $ 18 $ (642) $ 9,586 Termination reclasses to decrease operating lease assets $ (15,314) $ (4,285) $ (5,267) Termination reclasses to decrease operating lease liabilities $ (16,169) $ (4,537) $ (5,602) Termination reclasses to decrease finance lease assets $ (4,564) $ (1,351) $ (125) Termination reclasses to decrease finance lease liabilities $ (6,462) $ (87) $ (130)

Goodwill and other intangible a

Goodwill and other intangible assets	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Goodwill and other intangible assets	Goodwill and other intangible assets Goodwill Changes in the carrying amount of goodwill by segment for the year ended December 31, 2023, are as follows: Consumer Packaging Industrial Paper Packaging All Other Total Balance as of January 1, 2023 $ 898,625 $ 394,826 $ 381,860 $ 1,675,311 Acquisitions 15,704 92,657 — 108,361 Divestitures — (6,375) — (6,375) Measurement period adjustments 439 14,644 — 15,083 Foreign currency translation 5,669 10,654 1,951 18,274 Balance as of December 31, 2023 $ 920,437 $ 506,406 $ 383,811 $ 1,810,654 Goodwill activity reflected under the caption “Acquisitions” relates to the September 8, 2023 acquisitions of the remaining interest in RTS Packaging and the Chattanooga Mill and the December 1, 2023 acquisition of Inapel. Goodwill activity reflected under the caption “Divestitures” relates to the sales of the Company’s S3 business on January 26, 2023 and the U.S. BulkSak business on July 1, 2023. Goodwill activity reflected under the caption “Measurement period adjustments” relates to the current year acquisitions of the remaining interest in RTS Packaging and the Chattanooga Mill, as well as the prior year acquisitions of Metal Packaging, Skjern and Nordeste . See Note 3 for additional information. The Company assesses goodwill for impairment annually during the third quarter, or from time to time when warranted by the facts and circumstances surrounding individual reporting units or the Company as a whole. The Company completed its most recent annual goodwill impairment testing during the third quarter of 2023 and analyzed certain qualitative and quantitative factors in determining whether a goodwill impairment existed. The Company’s assessments reflected a number of significant management assumptions and estimates including the Company’s forecast of sales growth, gross profit margins, and discount rates. Changes in these assumptions could materially impact the Company’s conclusions. Based on its assessments, the Company concluded that there was no impairment of goodwill for any of its reporting units. Although no reporting units failed the annual impairment test, in management’s opinion the goodwill balance of the Plastics-Medical reporting unit, previously known as Plastics-Healthcare, is at risk of impairment in the near term if the reporting unit’s operations do not perform in line with management’s expectations, or if there is a negative change in the long-term outlook for the business or in other factors such as the discount rate. In the annual goodwill impairment analysis completed during the third quarter of 2023, projected future cash flows for the Plastics-Medical reporting unit were discounted at 12.0% and its estimated fair value was determined to exceed its carrying values by approximately 29.9%. Based on the discounted cash flow model and holding other valuation assumptions constant, the discount rate for this reporting unit would have to be increased to 14.5% in order for the estimated fair value of the reporting unit to fall below its carrying value. Total goodwill associated with the Plastics-Medical reporting unit was $64,212 at December 31, 2023. During the time subsequent to the annual evaluation, and at December 31, 2023, the Company considered whether any events and/or changes in circumstances had resulted in the likelihood that the goodwill of any of its reporting units may have been impaired. It is management’s opinion that no such events have occurred. Other intangible assets Details at December 31 are as follows: 2023 2022 Other Intangible Assets, Gross: Patents $ 29,304 $ 29,303 Customer lists 1,282,689 1,092,232 Trade names 41,836 34,220 Proprietary technology 56,857 57,720 Other 6,916 6,721 Other Intangible Assets, Gross $ 1,417,602 $ 1,220,196 Accumulated Amortization: Patents $ (19,549) $ (17,889) Customer lists (493,778) (417,034) Trade names (18,845) (15,892) Proprietary technology (29,013) (25,113) Other (2,747) (2,670) Accumulated Amortization $ (563,932) $ (478,598) Other Intangible Assets, Net $ 853,670 $ 741,598 The acquisition of the remaining interest in RTS Packaging and the acquisition of the Chattanooga Mill on September 8, 2023, and the December 1, 2023 acquisition of Inapel, resulted in the addition of $199,217 of intangible assets, primarily related to customer lists. These intangibles will be amortized over an average useful life of 14.8 years . The fair values of intangible assets associated with these acquisitions were determined using an income valuation approach. Aggregate amortization expense on intangible assets was $87,264, $80,445 and $49,419 for the years ended December 31, 2023, 2022 and 2021, respectively. Amortization expense on intangible assets is expected to approximate $88,200 in 2024, $79,200 in 2025, $75,300 in 2026, $73,900 in 2027 and $73,100 in 2028 based on intangible assets as of December 31, 2023.

Supply Chain Financing

Supply Chain Financing	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Supply Chain Financing	Supply chain financing The following table sets forth the balance sheet location and values of the obligations of the Company under its SCF Programs at December 31, 2023 and December 31, 2022: Balance Sheet Line Item December 31, 2023 December 31, 2022 Payable to suppliers (a) $ 35,847 $ 52,415 Notes payable and current portion of long-term debt (b) $ — $ 63,448 (a) The net payment of these obligations is included in “Net cash provided by operating activities” in the Company’s Consolidated Statements of Cash Flows.

Debt

Debt	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Debt	Debt Details of the Company’s debt at December 31 were as follows: 2023 2022 Syndicated term loan due August 2028 $ 572,025 $ — Syndicated term loan due January 2025 — 299,644 Syndicated term loan due December 2023 — 399,246 1.80% notes due February 2025 399,149 398,369 2.25% notes due February 2027 298,421 297,910 2.85% notes due February 2032 495,785 495,264 3.125% notes due May 2030 596,480 595,911 5.75% notes due November 2040 536,246 536,214 Other foreign denominated debt, average rate of 10.4% in 2023 and 5.7% in 2022 78,800 20,668 Finance lease obligations 88,994 102,920 Other debt 17,100 76,077 Total debt $ 3,083,000 $ 3,222,223 Less: Notes payable and current portion of long-term debt 47,132 502,440 Long-term debt $ 3,035,868 $ 2,719,783 On August 7, 2023, the Company entered into a credit agreement with a consortium of Farm Credit System institutions and CoBank, ACB, as Administrative Agent (the “Term Loan Agreement”). The Term Loan Agreement provides the Company with the ability to borrow up to $900,000 on an unsecured basis (the “Term Loan Facility”). A total of $600,000 was drawn from the Term Loan Facility on August 7, 2023 and used to repay the syndicated term loans that were due in December 2023 and January 2025, and to make certain capital expenditures and reimburse the Company for certain capital expenditures it had made in its operation of waste disposal facilities in rural areas. An additional $270,000 was drawn from the Term Loan Facility on September 8, 2023 and used to partially fund the acquisition of the remaining interest in RTS Packaging and the acquisition of the Chattanooga Mill (see Note 3 for more information). Borrowings under the Term Loan Facility, net of any prepayments, will become payable in full on August 7, 2028. As of December 31, 2023, the Company had repaid a total of $295,000 of the amounts drawn under the Term Loan Facility. Borrowings under the Term Loan Facility bear interest at a fluctuating rate per annum equal to, at the Company’s option, (i) the forward-looking SOFR term rate (“Term SOFR” and such borrowings, “Term SOFR Loans”), (ii) a base rate set forth in the Term Loan Agreement, or (iii) a combination thereof, plus, in each case, an applicable margin calculated based on the Company’s credit ratings and, in the of case of Term SOFR Loans, a SOFR Adjustment (as defined in the Term Loan Agreement) of 0.1%. The Company has designated its borrowings under the Term Loan Facility as Term SOFR Loans. The margin currently applicable to Term SOFR Loans based on the Company’s credit ratings, together with the SOFR Adjustment, is 1.90%. If Term SOFR ceases to be available, the benchmark rate shall switch to Daily Simple SOFR (as defined in the Term Loan Agreement). There is no required amortization under the Term Loan Facility, and voluntary prepayments are permissible without penalty, subject to certain conditions pertaining to minimum notice and minimum prepayment and reduction amounts as described in the Term Loan Agreement. The Term Loan Agreement contains various customary representations and warranties and affirmative and negative covenants, as more fully described in the Term Loan Agreement. The Term Loan Agreement also contains various customary events of default (subject to grace periods, as applicable) including, among others: nonpayment of principal, interest or fees; breach of covenant; payment default on, or acceleration under, certain other material indebtedness; inaccuracy of the representations or warranties in any material respect; bankruptcy or insolvency; inability to pay debts; certain unsatisfied judgments; certain ERISA-related events; the invalidity or unenforceability of the Term Loan Agreement or certain other documents executed in connection therewith; and the occurrence of a change of control. On June 30, 2021, the Company entered into a new five-year $750,000, unsecured revolving credit facility which replaced an existing credit facility entered into on July 20, 2017, and reflects substantially the same terms and conditions. Consistent with prior facilities, this revolving credit facility supports the Company’s $500,000 commercial paper program. Based on the pricing grid, the Credit Agreement for the revolving credit facility and Sonoco’s current credit ratings, any drawings are subject to the Term SOFR plus the 125.0 basis points margin. On August 7, 2023, the Company increased the commitments under this facility by $150,000 to an aggregate amount of $900,000. On April 28, 2021, the Company commenced a cash tender offer to purchase up to $300,000 of the $600,000 outstanding principal amount of its 5.75% notes due November 2040. Upon expiration of the tender on May 25, 2021, the Company repurchased 10.53% of its outstanding 5.75% notes for a total cash cost of $81,961, as shown below: Principal Amount Tendered Premium and Other Amounts Paid Total Cash 5.75% notes due November 2040 $ 63,206 $ 18,755 $ 81,961 On April 28, 2021, the Company entered into a reverse treasury lock agreement intended to fix the cash cost to fund approximately $100,000 of the maximum $300,000 principal amount subject to being tendered. The settlement of the reverse treasury lock on May 13, 2021 resulted in a loss of $1,356. In addition, the Company wrote off a proportional share of unamortized bond issuance costs and unamortized original issue discounts associated with the 5.75% notes. These non-cash write-offs net to $73, which combined with the hedge loss and premium and other amounts paid, resulted in a pretax loss from the early extinguishment of debt totaling $20,184. The principal requirements of debt maturing in the next five years are: 2024 2025 2026 2027 2028 Debt maturities by year $ 47,132 $ 449,774 $ 21,778 $ 310,355 $ 583,655 As of December 31, 2023, the Company has scheduled debt maturities through the next twelve months o f $47,132 . At December 31, 2023, the Company had $151,937 i n cash and cash equivalents on hand and $900,000 in committed capacity available for drawdown under its revolving credit facility. The Company believes that these amounts, combined with expected net cash flows from operating activities, provide ample liquidity to cover these debt maturities and other cash flow needs of the Company over the course of the next year. In addition, the Company had approximately $238,400 available under unused short-term lines of credit at December 31, 2023. These short-term lines of credit are available for general corporate purposes of our subsidiaries, including working capital and hedging requirements.

Financial instruments and deriv

Financial instruments and derivatives	12 Months Ended
	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Financial instruments and derivatives	Financial instruments and derivatives The following table sets forth the carrying amounts and fair values of the Company’s significant financial instruments for which the carrying amount differs from the fair value. December 31, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt, net of current portion $ 3,035,868 $ 2,890,009 $ 2,719,783 $ 2,477,884 The carrying value of cash and cash equivalents and short-term debt approximates fair value. The fair value of long-term debt is determined based on recent trade information in the financial markets of the Company’s public debt or is determined by discounting future cash flows using interest rates available to the Company for issues with similar terms and maturities, which is considered a Level 2 fair value measurement. Cash Flow Hedges At December 31, 2023 and 2022, the Company had derivative financial instruments outstanding to hedge anticipated transactions and certain asset and liability related cash flows. These contracts, which have maturities ranging through December 2024, qualify as cash flow hedges under U.S. GAAP. For derivative instruments that are designated and qualify as a cash flow hedge, the gain or loss on the derivative instrument is reported as a component of other comprehensive income and reclassified into earnings in the same period or periods during which the hedged transaction affects earnings and is presented in the same income statement line item as the earnings effect of the hedged item. Commodity Cash Flow Hedges Certain derivative contracts entered into to manage the cost of anticipated purchases of natural gas and aluminum have been designated by the Company as cash flow hedges. At December 31, 2023, these contracts included natural gas swaps covering approximately 0.1 million MMBTUs, representing approximately 1% of anticipated natural gas usage in 2024. The Company also has certain natural gas hedges that are not designated as cash flow hedges. See “Non-Designated Derivatives” below for a discussion of these hedges. The Company has also designated swap contracts covering 488 metric tons of aluminum as cash flow hedges. These contracts represent approximately 10% of anticipated aluminum usage for 2024. The fair values of the Company’s commodity cash flow hedges netted to a loss position of $(41) and $(172) at December 31, 2023 and December 31, 2022, respectively. The amount of the loss included in accumulated other comprehensive loss at December 31, 2023, expected to be reclassified to the income statement during the next twelve months is $(41). Foreign Currency Cash Flow Hedges The Company has entered into forward contracts to hedge certain anticipated foreign currency denominated sales, purchases, and capital spending expected to occur in 2024. The net positions of these contracts at December 31, 2023, were as follows (in thousands): Currency Action Quantity Colombian peso purchase 22,276,464 Mexican peso purchase 579,207 Polish zloty purchase 131,417 Danish Krone purchase 48,225 Swedish Krone sell (6,827) Czech koruna purchase 109,362 Euro purchase 2,291 Turkish lira purchase 57,507 Brazilian real purchase 54,302 British pound sell (435) Canadian dollar purchase 35,016 The fair value of foreign currency cash flow hedges related to forecasted sales and purchases netted to a gain position of $1,502 at December 31, 2023, and a loss position of $(299) at December 31, 2022. The amount of the gain expected to be reclassified from accumulated other comprehensive loss to the income statement during the next twelve months is $1,502. In addition, the Company has entered into forward contracts to hedge certain foreign currency cash flow transactions related to construction in progress. As of December 31, 2023 and December 31, 2022, the net positions of these contracts were $0 and $(564), respectively. During the twelve months ended December 31, 2023, losses from these hedges totaling $(401) were reclassified from accumulated other comprehensive loss and included in the carrying value of the capitalized expenditures. No gains or losses are expected to be reclassified from accumulated other comprehensive loss and included in the carrying value of the related fixed assets acquired during the next twelve months. Net Investment Hedge During 2023, the Company became a party to cross-currency swap agreements with a total notional amount of $500,000 to effectively convert a portion of the Company’s fixed-rate U.S. dollar denominated debt, including the semi-annual interest payments, to fixed-rate euro-denominated debt. The swap agreements, which have a maturity of December 18, 2026, provide for the Company to receive semi-annual interest payments in U.S. dollars at a fixed rate and to make semi-annual interest payments in euro at a fixed rate. The risk management objective of entering into the swap agreements is to manage foreign currency risk relating to net investments in certain European subsidiaries denominated in euros. The agreements are designated as net investment hedges for accounting purposes. The gain or loss on the net investment hedge derivative instrument is included in the foreign currency translation component of accumulated other comprehensive loss until the net investment is sold, diluted, or liquidated. Interest payments received for the cross-currency swaps are excluded from the net investment hedge effectiveness assessment and are recorded in “Interest expense” on the Company’s Consolidated Statements of Income. The assumptions used in measuring fair value of the cross-currency swaps are considered level 2 inputs, which are based upon the Euro-to-U.S. dollar exchange rate market. For the year ended December 31, 2023, the fair value of the Company’s net investment hedges was a loss position of $5,073, and a loss of $3,779 (net of income taxes of $1,294) was reported as a component of accumulated other comprehensive loss within foreign currency items. Non-Designated Derivatives The Company routinely enters into other derivative contracts which are not designated for hedge accounting treatment under ASC 815, “Derivatives and Hedging.” As such, changes in fair value of these non-designated derivatives are recorded directly to income and expense in the periods that they occur. Foreign Currency Hedges The Company routinely enters into forward contracts or swaps to economically hedge the currency exposure of intercompany debt and foreign currency denominated receivables and payables. The net currency positions of these non-designated contracts at December 31, 2023, were as follows (in thousands): Currency Action Quantity Colombian peso Purchase 59,655,780 Indonesian rupiah Purchase 7,711,880 Mexican peso Purchase 403,952 Turkish lira Purchase 5,593 Canadian dollar Purchase 5,923 Thai Baht Sell (10,459) Commodity Hedges The Company has entered into non-designated derivative contracts to manage the cost of anticipated purchases of natural gas. At December 31, 2023, these contracts consisted of natural gas swaps covering approximately 5.4 million MMBTUs and represented approximately 75% of anticipated usage in North America for 2024, respectively. Interest Rate Hedges Pursuant to the registered public offering of unsecured 2.85% notes with a principal amount of $500,000 maturing on February 1, 2032, the Company entered into two treasury lock derivative instruments with a notional principal amount of $150,000 each on December 29, 2021 with the risk management objective of reducing the Company's exposure to increases in the underlying Treasury index up to the date of pricing of the notes. The derivatives were settled when the bonds priced on January 11, 2022, with the Company recognizing a gain on the settlement of $5,201. The gain is included in “Selling, general and administrative expenses” on the Company’s Consolidated Statements of Income for the year ended December 31, 2022. The fair value of the Company’s non-designated derivatives position was a loss of $(6,790) and $(8,692) at December 31, 2023 and December 31, 2022, respectively. The following table sets forth the location and fair values of the Company’s derivative instruments at December 31, 2023 and December 31, 2022: Fair Value at December 31 Description Balance Sheet Location 2023 2022 Derivatives designated as hedging instruments: Commodity Contracts Prepaid expenses $ 67 $ 10 Commodity Contracts Other assets — 8 Commodity Contracts Accrued expenses and other (108) (155) Commodity Contracts Other liabilities — (35) Foreign Exchange Contracts Prepaid expenses 2,525 1,251 Foreign Exchange Contracts Accrued expenses and other (1,024) (2,114) Net investment hedge Prepaid expenses 5,567 — Net investment hedge Other liabilities (10,640) — Derivatives not designated as hedging instruments: Commodity Contracts Prepaid expenses $ 12 $ 5 Commodity Contracts Other assets — 251 Commodity Contracts Accrued expenses and other (6,782) (8,599) Commodity Contracts Other liabilities — (295) Foreign Exchange Contracts Prepaid expenses 130 115 Foreign Exchange Contracts Accrued expenses and other (159) (169) While certain of the Company's derivative contract arrangements with its counterparties provide for the ability to settle contracts on a net basis, the Company reports its derivative positions on a gross basis. There are no collateral arrangements or requirements in these agreements. The following tables set forth the effect of the Company’s derivative instruments on financial performance for the year ended December 31, 2023 and December 31, 2022, excluding the gains or losses on foreign currency cash flow hedges that were reclassified from accumulated other comprehensive loss to the carrying value of the capitalized expenditures: Description Amount of Gain or (Loss) Recognized in OCI on Derivatives Location of Gain or (Loss) Reclassified from Accumulated OCI Into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI Into Income Derivatives in Cash Flow Hedging Relationships: Year Ended December 31, 2023 Foreign Exchange Contracts $ 8,982 Net sales $ 10,860 Cost of sales $ (3,728) Commodity Contracts $ 99 Cost of sales $ (32) Year Ended December 31, 2022 Foreign Exchange Contracts $ (1,009) Net sales $ 3,460 Cost of sales $ (2,852) Commodity Contracts $ 5,321 Cost of sales $ 6,948 Description Gain or (Loss) Recognized Location of Gain or (Loss) Recognized in Income Statement Derivatives not Designated as Hedging Instruments: Year Ended December 31, 2023 Commodity Contracts $ (19,087) Cost of Sales Foreign Exchange Contracts $ 7,560 Selling, general and administrative Year Ended December 31, 2022 Commodity Contracts $ 1,831 Cost of sales Foreign Exchange Contracts $ 355 Selling, general and administrative Year Ended December 31, 2023 Year Ended December 31, 2022 Description Net Sales Cost of Sales Net Sales Cost of Sales Total amount of income and expense line items presented in the Consolidated Statements of Income $ 10,860 $ (3,760) $ 3,460 $ 4,096 Gain or (loss) on cash flow hedging relationships: Foreign exchange contracts: Amount of gain or (loss) reclassified from accumulated other comprehensive income into net income $ 10,860 $ (3,728) $ 3,460 $ (2,852) Commodity contract: Amount of gain or (loss) reclassified from accumulated other comprehensive income into net income $ — $ (32) $ — $ 6,948

Fair value measurements

Fair value measurements	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Fair value measurements	Fair value measurements Fair value is defined as an exit price representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or liability. A three-tier fair value hierarchy is used to prioritize the inputs in measuring fair value as follows: Level 1 – Observable inputs such as quoted market prices in active markets; Level 2 – Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 – Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions. Assets that are calculated at net asset value (“NAV”) per share are not required to be categorized within the fair value hierarchy. The following tables set forth information regarding the Company’s financial assets and financial liabilities that are measured at fair value on a recurring basis: Description December 31, 2023 Assets measured at NAV (f) Level 1 Level 2 Level 3 Hedge derivatives, net: Commodity contracts $ (41) $ — $ — $ (41) $ — Foreign exchange contracts 1,502 — — 1,502 — Net investment hedge (5,073) — — (5,073) — Non-hedge derivatives, net: Commodity contracts (6770) — — (6770) — Foreign exchange contracts (29) — — (29) — Postretirement benefit plan assets: Common Collective(a) 12,958 12,958 — — — Mutual funds(b) 45,931 — — 45,931 — Fixed income securities(c) 242,702 63,849 — 178,853 — Short-term investments(d) 4,175 — — 4,175 — Real estate funds(e) 400 400 — — — Cash and accrued income 2,634 — 2,634 — — Total postretirement benefit plan assets $ 308,800 $ 77,207 $ 2,634 $ 228,959 $ — Description December 31, 2022 Assets measured at NAV (f) Level 1 Level 2 Level 3 Hedge derivatives, net: Commodity contracts $ (172) $ — $ — $ (172) $ — Foreign exchange contracts (863) — — (863) — Non-hedge derivatives, net: Commodity contracts (8,638) — — (8,638) — Foreign exchange contracts (54) — — (54) — Postretirement benefit plan assets: Common Collective(a) 6,497 6,497 — — — Mutual funds(b) 50,467 — — 50,467 — Fixed income securities(c) 198,628 32,927 — 165,701 — Short-term investments(d) 1,099 — — 1,099 — Real estate funds(e) 680 680 — — — Cash and accrued income 8,504 — 8,504 — — Total postretirement benefit plan assets $ 265,875 $ 40,104 $ 8,504 $ 217,267 $ — a. Common collective trust investments consist of domestic and international large and mid capitalization equities, including emerging markets and funds invested in both short-term and long-term bonds. Underlying investments are generally valued at closing prices from national exchanges. Commingled funds, private securities, and limited partnerships are valued at unit values or NAVs provided by the investment managers. b. Mutual fund investments are comprised of equity securities of corporations with large capitalizations and also include funds invested in corporate equities in international and emerging markets and funds invested in long-term bonds, which are valued at closing prices from national exchanges. c. Fixed income securities include funds that invest primarily in government securities and long-term bonds. Underlying investments are generally valued at closing prices from national exchanges, fixed income pricing models, and independent financial analysts. Fixed income commingled funds are valued at unit values provided by the investment managers. d. Short-term investments include several money market funds used for managing overall liquidity. Underlying investments are generally valued at closing prices from national exchanges. Commingled funds are valued at unit values provided by the investment managers. e. Includes investments in real estate funds (including office, industrial, residential and retail). Underlying real estate securities are generally valued at closing prices from national exchanges. f. Certain assets that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy. The Company’s pension plan assets comprise more than 96% of its total postretirement benefit plan assets. Accordingly, the assets of the Company’s various pension plans and retiree health and life insurance plans are not shown separately, but are combined in the tables above. Postretirement benefit plan assets are netted against postretirement benefit obligations to determine the funded status of each plan. The funded status is recognized in the Company’s Consolidated Balance Sheets as shown in Note 14. As discussed i n Note 11, the Company uses derivatives to mitigate the effect of commodity fluctuations, foreign currency fluctuations and, from time to time, interest rate movements. Fair value measurements for the Company’s derivatives are classified under Level 2 because such measurements are estimated based on observable inputs such as interest rates, yield curves, spot and future commodity prices, and spot and future exchange rates. The Company does not currently have any nonfinancial assets or liabilities that are recognized or disclosed at fair value on a recurring basis. None of the Company’s financial assets or liabilities are measured at fair value using significant unobservable inputs. There were no transfers in or out of Level 1 or Level 2 fair value measurements during the years ended December 31, 2023 or 2022. For additional fair value information on the Company’s financial instruments, see Note 11.

Share-based compensation plans

Share-based compensation plans	12 Months Ended
	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Share-based compensation plans	Share-based compensation plans The Company provides share-based compensation to certain employees and non-employee directors in the form of restricted stock units (“RSUs”), performance contingent restricted stock units (“PCSUs”), and other share-based awards pursuant to the Sonoco Products Company 2019 Omnibus Incentive Plan (the “2019 Plan”), which became effective upon approval by the shareholders on April 17, 2019. At December 31, 2023, a total of 5,069,768 shares remain available for future grant under the 2019 Plan. The Company issues new shares for stock unit conversions and stock appreciation right exercises. Accounting for share-based compensation Total compensation cost for share-based payment arrangements was $27,780, $31,309 and $22,608, for 2023, 2022 and 2021, respectively. The related tax benefit recognized in net income/(loss) was $6,920, $7,999, and $5,715, for the same years, respectively. Share-based compensation expense is included in “Selling, general and administrative expenses” in the Company’s Consolidated Statements of Income. The Company accounts for forfeitures of its share-based payment arrangements as they occur. An “excess” tax benefit is created when the tax deduction for an exercised stock appreciation right or converted stock unit exceeds the compensation cost that has been recognized in income. The additional net excess tax benefit realized was $978, $1,367 and $1,110 for 2023, 2022 and 2021, respectively. Restricted Stock Units The Company grants awards of RSUs to executive officers and certain key management employees annually on a discretionary basis. These awards vest over a three-year period with one-third vesting on each anniversary date of the grant. The expense for these RSUs is recognized following the graded-vesting method, which results in front-loaded expense being recognized during the early years of the required service period. For grants awarded prior to 2021, participants must be actively employed by the Company on the vesting date for shares to be issued, except in the event of the participant’s death, disability, or involuntary (or good reason) termination within two years of a change in control prior to full vesting, in which case shares will immediately vest. For awards granted since 2020, in the event of the participant’s death, disability or retirement prior to full vesting, shares will be issued on a pro rata basis up through the time the participant’s employment or service ceases. Once vested, these awards do not expire. The Company from time to time grants special RSUs to certain of its executive officers and directors. These awards normally vest over a five-year period with one-third vesting on each of the third, fourth and fifth anniversaries of the grant, but in some circumstances may vest over a shorter period, or cliff vest at the end of the five-year period. Normally a participant must be actively employed by, or serving as a director of, the Company on the vesting date for shares to be issued, but the Company may make other arrangements in connection with termination of employment prior to the vesting date. Officers and directors can elect to defer receipt of RSUs, which will be issued in shares of Sonoco common stock in installments beginning no earlier than six months following separation from the Company or the Board of Directors (the “Board”), respectively. Key management employees are required to take receipt of the stock issued upon the vest date. The weighted-average grant-date fair value of RSUs granted was $56.87, $53.55 and $57.77 per share in 2023, 2022 and 2021, respectively. The fair value of shares vesting during the year was $10,320, $6,243, and $4,063 for 2023, 2022 and 2021, respectively. Non-cash stock-based compensation associated with restricted stock grants totaled $15,005, $11,113 and $8,278 for 2023, 2022 and 2021, respectively. As of December 31, 2023, there was $11,674 of total unrecognized compensation cost related to nonvested RSUs. This cost is expected to be recognized over a weighted-average period of 26 months. The activity related to RSUs for the year ended December 31, 2023 is as follows: Nonvested Vested Total Average Grant Date Fair Value Per Share Outstanding, December 31, 2022 462,395 73,309 535,704 $ 53.23 Granted 325,771 — 325,771 $ 56.87 Vested (172,786) 172,786 — Converted (179,198) (179,198) $ 54.12 Cancelled (24,148) — (24,148) $ 55.79 Dividend equivalents 2,213 1,918 4,131 $ 56.97 Outstanding, December 31, 2023 593,445 68,815 662,260 $ 54.71 Performance Contingent Restricted Stock Units The Company grants PCSUs annually on a discretionary basis to executive officers and certain key management employees. The ultimate number of PCSUs awarded is dependent upon the degree to which performance, relative to defined targets related to earnings and return on invested capital is achieved over a three-year performance cycle and for the 2023 PCSU grant only, a modifier for total stock return performance. The Company estimates the fair value of its 2023 PCSUs based upon the Company’s stock price on the date of grant and an estimate of the Company’s payout modifier based upon the projected total stock return performance relative to its peer group companies. The comparative market indices for the awards that vest based on total stock return to shareholders are the S&P Composite 1500 Materials Index. If the Company’s actual total stock return for the three-year measurement period is determined to be between the 25th and 75th percentile relative to its peers, no additional modifier is triggered for the 2023 PCSU grant upon vesting. If the Company’s total stock return for the three-year measurement period is determined to be above the 75th percentile, the modifier adds 20% to the award’s vested share payout for total stock return performance in the top quartile, and if the Company’s return falls below the 25th percentile relative to its peers, the modifier reduces the award’s share payout by 20% for performance in the bottom quartile. PCSUs granted vest at the end of the three-year performance period if the respective performance targets are met. No units will be awarded if the performance targets are not met. Upon vesting, PCSUs are convertible into common shares on a one-for-one basis. Officers can elect to defer receipt of PCSUs, which will be issued in shares of Sonoco common stock in installments beginning no earlier than six months following separation from the Company. Key management employees are required to take receipt of the stock issued upon the vest date. Except in the event of the participant's death, disability, or retirement, if a participant is not employed by the Company at the end of the performance period, no PCSUs will vest. However, in the event of the participant’s death, disability or retirement prior to full vesting, shares will be issued on a pro rata basis up through the time the participant’s employment or service ceases. In the event of a change in control, as defined under the 2019 Plan, all unvested PCSUs will vest at target on a pro rata basis if the change in control occurs during the three-year performance period. The activity related to PCSUs for the year ended December 31, 2023 is as follows: Nonvested Vested Total Average Grant Date Fair Value per Share Outstanding, December 31, 2022 599,382 302,400 901,782 $52.81 Granted 205,178 — 205,178 $55.04 Performance adjustments (129,224) — (129,224) $55.04 Vested (225,530) 225,530 — Converted — (291,818) (291,818) $51.68 Cancelled (31,403) — (31,403) $54.08 Dividend equivalents — 380 380 $56.99 Outstanding, December 31, 2023 418,403 236,492 654,895 $53.51 2023 PCSU. As of December 31, 2023, the 2023 PSCUs to be awarded are estimated to range from 0 to 449,255 units, including the 20% total stock return modifier, and are tied to the three-year performance period ending December 31, 2025. 2022 PCSU. As of December 31, 2023, the 2022 PSCUs to be awarded are estimated to range from 0 to 342,808 units and are tied to the three-year performance period ending December 31, 2024. 2021 PCSU. The performance cycle for the 2021 PSCUs was completed on December 31, 2023. Outstanding stock units of 225,530 units were determined to have been earned. The fair value of these units was $12,600 as of December 31, 2023. 2020 PCSU. The performance cycle for the 2020 PSCUs was completed on December 31, 2022. Outstanding stock units of 280,881 units were determined to have been earned. The fair value of these units was $17,052 as of December 31, 2022. 2019 PCSU. The performance cycle for the 2019 PCSUs was completed on December 31, 2021. Outstanding stock units of 64,243 were determined to have been earned. The fair value of these units was $3,719 as of December 31, 2021. The weighted-average grant-date fair value of PCSUs granted was $55.04, $51.94, and $55.95 per share in 2023, 2022 and 2021, respectively. Non-cash stock-based compensation associated with PCSUs totaled $10,751, $17,900 and $11,477 for 2023, 2022 and 2021, respectively. As of December 31, 2023, there was approximately $8,746 of total unrecognized compensation cost related to nonvested PCSUs. This cost is expected to be recognized over a weighted-average period of 16 months. Stock appreciation rights Through 2019, the Company granted stock appreciation rights (“SARs”) annually on a discretionary basis to key employees. These SARs had an exercise price equal to the closing market price on the date of the grant and can be settled only in stock. The SARs granted from 2015 through 2019 vested over three years, with one-third vesting on each anniversary date of the grant, and had 10-year terms. All outstanding SARs are vested as of December 31, 2023. SARs expense was recognized following the graded-vesting method. As of December 31, 2023, there is no unrecognized compensation cost, and no non-cash stock-based compensation expense was incurred for the year ended December 31, 2023 related to nonvested SARs. Noncash stock-based compensation expense associated with SARs totaled $40 for 2022 and $347 for 2021. The aggregate intrinsic value of SARS exercised during 2023, 2022, and 2021 was $158, $582, and $2,575, respectively. The activity related to the Company’s SARs for the year ended December 31, 2023 is as follows: Nonvested Vested Total Weighted- average Exercise Price Outstanding, December 31, 2022 — 764,806 764,806 $ 54.98 Vested — — — Granted — — — $ — Exercised — (26,671) (26,671) $ 49.96 Forfeited/Expired — (8,620) (8,620) $ — Outstanding, December 31, 2023 — 729,515 729,515 $ 55.13 Exercisable, December 31, 2023 — 729,515 729,515 $ 55.13 The weighted average remaining contractual life for both SARs outstanding and exercisable at December 31, 2023 was 4.1 years. The aggregate intrinsic value for both SARs outstanding and exercisable at December 31, 2023 was $2,217. At December 31, 2023, the fair market value of the Company’s stock used to calculate intrinsic value was $55.87 per share. Deferred compensation plans Certain officers of the Company receive a portion of their compensation, either current or deferred, in the form of stock equivalent units. Units are granted as of the day the cash compensation would have otherwise been paid using the closing price of the Company’s common stock on that day. Deferrals into stock equivalent units are converted into phantom stock equivalents as if Sonoco shares were actually purchased. The units immediately vest and earn dividend equivalents. Units are distributed in the form of common stock upon retirement over a period elected by the employee. Non-employee directors may elect to defer a portion of their cash retainer or other fees (except chair retainers) into phantom stock equivalent units as if Sonoco shares were actually purchased. The deferred stock equivalent units accrue dividend equivalents, and are issued in shares of Sonoco common stock beginning six months following termination of Board service. Directors must elect to receive these deferred distributions in one, three or five annual installments. The activity related to deferred compensation for equity award units granted to both employees and non-employee directors combined is as follows: Total Outstanding, December 31, 2022 287,015 Deferred 36,254 Converted (8,406) Dividend equivalents 9,739 Outstanding, December 31, 2023 324,602 Compensation deferrals for employees and directors, all of which will be settled in Company stock after retirement, totaled $2,024, $2,256, and $2,507, during 2023, 2022, and 2021, respectively.

Employee benefit plans

Employee benefit plans	12 Months Ended
	Dec. 31, 2023
Retirement Benefits [Abstract]
Employee benefit plans	Employee benefit plans Retirement plans and retiree health and life insurance plans The Company provides non-contributory defined benefit pension plans for certain of its employees in the United States, Mexico, Belgium, Germany, Greece, France, and Turkey. The Company also sponsors contributory defined benefit pension plans covering certain of its employees in the United Kingdom, Canada and the Netherlands, and provides postretirement healthcare and life insurance benefits to a limited number of its retirees and their dependents in the United States and Canada, based on certain age and/or service eligibility requirements. The components of net periodic benefit cost include the following: 2023 2022 2021 Retirement Plans Service cost $ 2,918 $ 3,304 $ 3,916 Interest cost 18,101 10,562 24,186 Expected return on plan assets (9,451) (10,302) (22,888) Amortization of prior service cost 926 913 900 Amortization of net actuarial loss 4,300 6,240 16,503 Effect of settlement loss 1,010 479 550,706 Effect of curtailment loss — 43 — Net periodic benefit cost $ 17,804 $ 11,239 $ 573,323 Retiree Health and Life Insurance Plans Service cost $ 230 $ 320 $ 374 Interest cost 507 258 197 Expected return on plan assets (313) (439) (444) Amortization of prior service credit — — — Amortization of net actuarial gain (768) (681) (744) Net periodic benefit income $ (344) $ (542) $ (617) The following tables set forth the Plans’ obligations and assets at December 31: Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Change in Benefit Obligation Benefit obligation at January 1 $ 352,843 $ 514,633 $ 11,244 $ 13,745 Service cost 2,918 3,304 230 320 Interest cost 18,101 10,562 507 258 Plan participant contributions 60 50 — — Plan amendments 306 665 11,637 — Actuarial loss/(gain) 15,663 (124,982) (266) (1,825) Benefits paid (26,703) (22,268) (788) (1,224) Impact of foreign exchange rates 8,707 (27,273) 7 (30) Effect of settlements (2,373) (1,736) — — Effect of curtailments — (112) — — Acquisitions 43,934 — — — Benefit obligation at December 31 $ 413,456 $ 352,843 $ 22,571 $ 11,244 Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Change in Plan Assets Fair value of plan assets at January 1 $ 253,125 $ 417,105 $ 12,750 $ 13,942 Actual return on plan assets 15,968 (119,714) 553 (532) Company contributions 13,908 14,677 754 652 Plan participant contributions 60 50 — — Benefits paid (26,703) (22,268) (788) (1,224) Impact of foreign exchange rates 10,388 (33,800) — — Effect of settlements (2,373) (1,736) — — Expenses paid (1,108) (1,189) (56) (88) Acquisitions 32,322 — — — Fair value of plan assets at December 31 $ 295,587 $ 253,125 $ 13,213 $ 12,750 Funded Status of the Plans $ (117,869) $ (99,718) $ (9,358) $ 1,506 Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Total Recognized Amounts in the Consolidated Balance Sheets Noncurrent assets $ 26,599 $ 30,322 $ — $ 2,919 Current liabilities (9,797) (9,478) (1,801) (1,049) Noncurrent liabilities (134,671) (120,562) (7,557) (364) Net (liability)/asset $ (117,869) $ (99,718) $ (9,358) $ 1,506 Items not yet recognized as a pre-tax component of net periodic benefit cost that are included in Accumulated Other Comprehensive Loss as of December 31, 2023 and 2022, are as follows: Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Net actuarial loss/(gain) $ 114,957 $ 109,558 $ (6,120) $ (6,437) Prior service cost 5,557 6,053 11,637 — $ 120,514 $ 115,611 $ 5,517 $ (6,437) The pre-tax amounts recognized in Other Comprehensive Loss/(Income) include the following: Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2021 2023 2022 2021 Adjustments arising during the period: Net actuarial loss/(gain) $ 10,709 $ 4,839 $ (63,684) $ (451) $ (761) $ (412) Prior service cost 430 678 837 11,637 — — Net settlements/curtailments (1,010) (522) (550,706) — — — Amortization recognized during the period: Net actuarial (loss)/gain (4,300) (6,240) (16,503) 768 681 744 Prior service (cost)/credit (926) (913) (900) — — — Total recognized in other comprehensive loss/(income) $ 4,903 $ (2,158) $ (630,956) $ 11,954 $ (80) $ 332 Total recognized in net periodic benefit cost and other comprehensive loss/(income) $ 22,707 $ 9,081 $ (57,633) $ 11,610 $ (622) $ (285) The accumulated benefit obligation (“ABO”) for all defined benefit plans was $404,648 and $347,608 at December 31, 2023 and 2022, respectively. The projected benefit obligation (“PBO”), ABO and fair value of plan assets for pension plans with ABOs in excess of plan assets were, $229,397, $224,045 and $84,929, respectively, as of December 31, 2023, and $176,702, $171,705 and $48,277, respectively, as of December 31, 2022. RTS Packaging defined benefit plan On September 8, 2023, the Company completed the acquisition of the remaining 65% ownership interest of the RTS Packaging joint venture, which included the assumption of the RTS Packaging Pension Plan (the “RTS Plan”). At the time of the acquisition, the RTS Plan had a PBO of $43,934 and plan assets of $32,322, resulting in long-term and short term unfunded pension obligations of $11,529 and $83, respectively. Since the formation of the original joint venture, the Company had recognized its 35% share of actuarial gains and losses related to the RTS Plan in “Accumulated other comprehensive loss.” Upon the acquisition of the remaining 65% interest in RTS Packaging, a pre-tax loss of $4,756 ($3,543 after tax) was reclassified out of “Accumulated other comprehensive loss” into earnings. The pre-tax loss is reflected in “Other income, net” in the Company’s Consolidated Statements of Income for the year ending December 31, 2023. Plan termination, settlements, changes and amendments The Company amended its U.S. Retiree Health and Life Insurance Plan in 2023 to expand the eligibility requirements for certain non-union hourly employees. The amendment resulted in an increase in both the accumulated postretirement benefit obligation and prior service cost component of accumulated other comprehensive loss of $11,637. The service cost will be amortized over the average life expectancy of the plan participants beginning in 2024. The Company recognized settlement charges totaling $1,010 and $479 in 2023 and 2022, respectively. Settlements in both years resulted from payments made to certain participants in the Company’s non-union Canadian pension plan who elected a lump sum distribution option upon retirement. Settlements in 2023 also included payments associated with the termination of a pension plan in Taiwan. In July 2019, the Board approved a resolution to terminate the Sonoco Pension Plan for Inactive Participants (the “Inactive Plan”), a tax-qualified defined benefit plan, effective September 30, 2019. Following completion of a limited lump sum offering in April 2021, the Company settled all remaining liabilities under the Inactive Plan in June 2021 through the purchase of annuities. The Company made additional net contributions of $124,432 to the Inactive Plan in 2021 in order to be fully funded on a termination basis at the time of the annuity purchase. Non-cash, pretax settlement charges totaling $538,722 were recognized in 2021 as the lump sum payouts and annuity purchases were made. The termination of the Inactive Plan applied to participants who had separated service from Sonoco and to non-union active employees who no longer accrued pension benefits. There was no change in the cumulative benefit previously earned by the approximately 11,000 participants affected by these actions. The Company continues to manage and support the Sonoco Pension Plan for Active Participants (the “Active Plan”), comprised of approximately 700 active participants who continue to accrue benefits in accordance with a flat-dollar multiplier formula. Additional settlement charges of $11,984 were recognized in 2021, primarily due to the annuitization of the Trenton Union Plan in Ontario, Canada. This plan was terminated in June 2020 and the participants were fully annuitized in December 2021. Projected benefit payments The following table sets forth the Company’s projected benefit payments for the next ten years: Year Retirement Plans Retiree Health and Life Insurance Plans 2024 $ 29,104 $ 1,853 2025 $ 29,914 $ 1,885 2026 $ 32,028 $ 2,044 2027 $ 31,621 $ 1,906 2028 $ 31,606 $ 2,159 2029-2033 $ 160,293 $ 9,793 Assumptions The following tables set forth the major actuarial assumptions used in determining the benefit obligation and net periodic benefit cost: Weighted-average assumptions used to determine benefit obligations at December 31 U.S. Retirement Plans U.S. Retiree Health and Life Insurance Plans Foreign Plans Discount Rate 2023 4.84 % 4.68 % 4.79 % 2022 5.01 % 4.92 % 4.97 % Rate of Compensation Increase 2023 — % 3.03 % 3.11 % 2022 — % 2.99 % 3.29 % Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31 U.S. Retirement Plans U.S. Retiree Health and Life Insurance Plans Foreign Plans Discount Rate 2023 5.01 % 4.92 % 4.97 % 2022 2.77 % 2.48 % 2.22 % 2021 2.32 % 2.04 % 1.70 % Expected Long-term Rate of Return 2023 2.48 % 2.45 % 4.70 % 2022 3.27 % 3.18 % 3.00 % 2021 3.27 % 2.01 % 3.69 % Rate of Compensation Increase 2023 — % 2.99 % 3.29 % 2022 — % 3.01 % 3.21 % 2021 — % 3.03 % 3.20 % The Company adjusts its discount rates at the end of each fiscal year based on yield curves of high-quality debt instruments over durations that match the expected benefit payouts of each plan. The expected long-term rate of return assumption is based on the Company’s current and expected future portfolio mix by asset class, and expected nominal returns of these asset classes using an economic “building block” approach. Expectations for inflation and real interest rates are developed and various risk premiums are assigned to each asset class based primarily on historical performance. The assumed rate of compensation increase reflects historical experience and management’s expectations regarding future salary and incentive increases. Medical trends The U.S. Retiree Health and Life Insurance Plan makes up approximately 98% of the Retiree Health liability. Therefore, the following information relates to the U.S. plan only. Healthcare Cost Trend Rate Pre-age 65 Post-age 65 2023 6.25 % 7.25 % 2022 5.80 % 6.50 % Ultimate Trend Rate Pre-age 65 Post-age 65 2023 4.50 % 4.50 % 2022 4.50 % 4.50 % Year at which the Rate Reaches the Ultimate Trend Rate Pre-age 65 Post-age 65 2023 2033 2033 2022 2030 2030 Based on amendments to the U.S. plan approved in 1999, which became effective in 2003, cost increases borne by the Company are limited to the Urban CPI, as defined. Retirement plan assets The assets of the U.S., RTS Plan, U.K., and Canadian defined benefit plans comprise approximately 93% of the total postretirement benefit plan assets. Therefore, the following disclosures relate only to the assets of these plans. The following table sets forth the weighted-average asset allocations of the Company’s retirement plans at 2023 and 2022, by asset category. Asset Category U.S. RTS U.K. Canada Equity securities 2023 22.2 % 18.6 % 20.0 % 29.4 % 2022 23.4 % N/A 22.6 % 34.0 % Debt securities 2023 76.6 % 81.2 % 79.1 % 70.6 % 2022 72.9 % N/A 76.3 % 66.0 % Cash and short-term investments 2023 1.2 % 0.2 % 0.9 % — % 2022 3.7 % N/A 1.1 % — % Total 2023 100.0 % 100.0 % 100.0 % 100.0 % 2022 100.0 % N/A 100.0 % 100.0 % The Company employs a total-return investment approach whereby a mix of equities and fixed income investments are used to maximize the long-term return of plan assets for a desired level of risk. Alternative assets such as real estate funds, private equity funds and hedge funds may also be used to enhance expected long-term returns while improving portfolio diversification. Risk tolerance is established through consideration of plan liabilities, plan funded status and corporate financial condition. Investment risk is measured and monitored on an ongoing basis through periodic investment portfolio reviews and periodic asset/liability studies. U.S. defined benefit plans The Company has adopted investment guidelines for the Active Plan based on asset/liability studies. These guidelines established a dynamic derisking framework for shifting the allocation of assets to long-duration domestic fixed income from equity and other asset categories, as the relative funding ratio of the plan increased over time. The current target allocation (midpoint) for the Active Plan investment portfolio is: Equity Securities - 20% and Debt Securities – 80%. RTS defined benefit plan The Company has adopted similar investment guidelines for the RTS Plan as it has for its U.S. Active Plan assets. The current target allocation (midpoint) for the RTS Plan investment portfolio is: Equity Securities – 20% and Debt Securities – 80%. United Kingdom defined benefit plan The equity investments consist of direct ownership and funds and are diversified among U.K. and international stocks of small and large capitalization. The current target allocation (midpoint) for the investment portfolio is: Equity Securities – 20% and Debt Securities – 80%. Canada defined benefit plan The equity investments consist of direct ownership and funds and are diversified among Canadian and international stocks of primarily large capitalizations and short to intermediate duration corporate and government bonds. The current target allocation (midpoint) for the investment portfolio is 29% Equity Securities and 71% Debt Securities. Retiree health and life insurance plan assets The following table sets forth the weighted-average asset allocations by asset category of the Company’s retiree health and life insurance plan. Asset Category 2023 2022 Equity securities —% —% Debt securities 100.0% 100.0% Cash —% —% Total 100.0% 100.0% Contributions Based on current actuarial estimates, the Company anticipates that contributions to its defined benefit plans will be approximately $19,000 in 2024. No assurances can be made about funding requirements beyond 2024, however, as they will depend largely on actual investment returns and future actuarial assumptions, legislative actions, and changes to the Company’s benefit offerings. Sonoco Retirement and Savings Plan The Sonoco Retirement and Savings Plan is a defined contribution retirement plan provided for certain of the Company’s U.S. employees. Through December 31, 2021, the plan was comprised of both an elective and non-elective component. The elective component of the plan, which is designed to meet the requirements of section 401(k) of the Internal Revenue Code, allows participants to set aside a portion of their wages and salaries for retirement and encourages saving by matching a portion of their contributions with contributions from the Company. The plan provides for participant contributions of 1% to 100% of gross pay. Effective December 31, 2021, the Company’s 401(k) matching contribution was increased to 100% of the first 6% of pretax and/or Roth compensation contributed by the participant. Prior to this, the Company had matched 50% on the first 4% of such participant contributions. Participants are immediately fully vested in these matching contributions. The Company’s expenses related to the plan for 2023, 2022 and 2021 were approximately $41,000, $38,900 and $13,900, respectively. The non-elective component of the plan, the Sonoco Retirement Contribution (“SRC”), was eliminated effective December 31, 2021 and the benefit replaced by the higher matching 401(k) matching contribution discussed above. The SRC was available to certain employees who were not active participants in the Company’s U.S. qualified defined benefit pension plan and provided for an annual Company contribution of 4% of all eligible pay plus 4% of eligible pay in excess of the Social Security wage base to eligible participant accounts. Participants were fully vested after three years of service or upon reaching age 55, if earlier. As a result of the termination, the Company recognized no SRC expense in 2023 or 2022. Expenses related to the plan for 2021 were approximately $22,914. Cash contributions to the SRC, which were made annually in March following the year in which they were earned, totaled $21,948 and $22,665 in 2022 and 2021, respectively. The Company made no annual SRC contributions in 2023 and no additional annual contributions will be made in the future. Other plans The Company also provides retirement and postretirement benefits to certain other non-U.S. employees through various Company-sponsored and local government sponsored defined contribution arrangements. For the most part, the liabilities related to these arrangements are funded in the period they arise. The Company’s expenses for these plans were not material for all years presented.

Income taxes

Income taxes	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Income taxes	Income taxes The provision for taxes on income for the years ended December 31 consists of the following: 2023 2022 2021 Pretax income Domestic $ 400,241 $ 363,518 $ (342,951) Foreign 214,591 207,764 181,969 Total pretax income $ 614,832 $ 571,282 $ (160,982) Current Federal $ 79,200 $ 55,016 $ 21,247 State 16,681 15,997 15,212 Foreign 65,617 59,762 55,018 Total current $ 161,498 $ 130,775 $ 91,477 Deferred Federal $ (5,447) $ (2,495) $ (120,243) State (2,249) (5,441) (39,709) Foreign (4,524) (4,330) 1,045 Total deferred $ (12,220) $ (12,266) $ (158,907) Total taxes $ 149,278 $ 118,509 $ (67,430) Deferred tax (liabilities)/assets are comprised of the following at December 31: 2023 2022 Property, plant and equipment $ (137,880) $ (104,162) Intangibles (119,225) (104,171) Leases (48,832) (89,226) Outside basis in Metal Packaging (68,867) (74,092) Gross deferred tax liabilities $ (374,804) $ (371,651) Retiree health benefits $ 513 $ 1,222 Foreign loss carryforwards 62,250 79,460 U.S. Federal loss and credit carryforwards 39,131 36,529 Capital loss carryforwards 3,817 3,626 U.S. State loss and credit carryforwards 21,321 20,961 Capitalized research and development costs 87,743 45,826 Employee benefits 51,829 42,641 Leases 50,704 89,416 Accrued liabilities and other assets 58,699 56,601 Gross deferred tax assets $ 376,007 $ 376,282 Valuation allowance on deferred tax assets $ (70,661) $ (82,046) Total deferred taxes, net $ (69,458) $ (77,415) The Company has total federal net operating loss carryforwards of approximately $79,501 remaining at December 31, 2023. These losses are limited based upon future taxable earnings of the Company and expire between 2032 and 2038. U.S. foreign tax credit carryforwards of approximately $22,434 exist at December 31, 2023 and expire in 2027. Foreign subsidiary loss carryforwards of approximately $258,412 remain at December 31, 2023. Their use is limited to future taxable earnings of the respective foreign subsidiaries or filing groups. Approximately $203,574 of these loss carryforwards do not have an expiration date. Of the remaining foreign subsidiary loss carryforwards, approximately $15,178 expire within the next five years and approximately $39,660 expire between 2029 and 2043. Foreign subsidiary capital loss carryforwards of approximately $15,256 exist at December 31, 2023 and do not have an expiration date. Their use is limited to future capital gains of the respective foreign subsidiaries. Approximately $10,113 in tax value of state loss carryforwards and $16,876 of state credit carryforwards remain at December 31, 2023. These state loss and credit carryforwards are limited based upon future taxable earnings of the respective entities or filing group and expire between 2024 and 2044. State loss and credit carryforwards are reflected at their “tax” value, as opposed to the amount of expected gross deduction due to the vastly different apportionment and statutory tax rates applicable to the various entities and states in which the Company files. A reconciliation of the U.S. federal statutory tax rate to the actual provision for/(benefit from) income taxes is as follows: 2023 2022 2021 Statutory tax rate $ 129,115 21.0 % $ 119,945 21.0 % $ (33,806) 21.0 % State income taxes, net of federal tax benefit 16,051 2.6 % 13,149 2.3 % (15,863) 9.9 % Valuation allowance 4,486 0.7 % (10,477) (1.8) % (33,576) 20.9 % Tax examinations including change in reserve for uncertain tax positions 2,183 0.4 % 567 0.1 % 5,665 (3.5) % Adjustments to prior year deferred taxes (2,489) (0.4) % (2,110) (0.4) % 1,239 (0.8) % Foreign earnings taxed at other than U.S. rates 13,704 2.2 % 12,334 2.2 % 9,659 (6.0) % Divestiture of business 464 0.1 % — — % (808) 0.5 % Effect of tax rate changes 387 0.1 % (2,151) (0.4) % 275 (0.2) % Foreign withholding taxes 4,635 0.8 % 4,670 0.8 % 8,107 (5.0) % Tax credits (18,841) (3.1) % (14,077) (2.5) % (21,936) 13.6 % Global intangible low-taxed income (GILTI) 2,930 0.5 % 2,851 0.5 % 11,323 (7.0) % Foreign-derived intangible income (1,106) (0.2) % (657) (0.1) % (202) 0.1 % Foreign currency gain/(loss) on distributions of previously taxed income (2,614) (0.4) % (1,280) (0.2) % 3,365 (2.1) % Other, net 373 0.1 % (4,255) (0.7) % (872) 0.5 % Provision for/(Benefit from) income taxes $ 149,278 24.3 % $ 118,509 20.7 % $ (67,430) 41.9 % The Company was subject to the one-time transition tax on certain accumulated foreign earnings as part of the Tax Cuts and Jobs Act (“Tax Act”). Under the provisions of the Tax Act, the transition tax was payable in installments over a period of 8 years. The Company paid its final installment of $1,366 during 2023 and has no remaining obligation. The change in “Tax examinations including change in reserve for uncertain tax positions” is shown net of associated deferred taxes and accrued interest. Included in the change are net increases in reserves for uncertain tax positions of approximately $3,074, $2,051 and $2,330 for uncertain items arising in 2023, 2022 and 2021, respectively, combined with adjustments related to prior year items, primarily decreases related to lapses of statutes of limitations in international, federal and state jurisdictions as well as overall changes in facts and judgment. These adjustments changed the reserve by a total of approximately $(891), $(1,484) and $3,743 in 2023, 2022 and 2021, respectively. In many of the countries in which the Company operates, earnings are taxed at rates different than in the United States. This difference is reflected in “Foreign earnings taxed at other than U.S. rates” along with other items, if any, that impacted taxes on foreign earnings in the periods presented. The benefits included in “Adjustments to prior year deferred taxes” for each of the years presented consist primarily of adjustments to deferred tax assets and liabilities arising from changes in estimates. Of the $18,841 of tax credits for 2023, $2,442 directly offset the $2,930 of GILTI tax, resulting in a net GILTI tax of $488. Of the remainder, $8,735 relates to research and development tax credits. The GILTI tax in 2022 of $2,851 was partially offset by GILTI tax credits of $1,245, resulting in a net GILTI tax of $1,606. The benefits included in “Valuation allowance” for 2022 include a $13,182 net recognized benefit associated with the release of valuation allowance on foreign NOLs due to an increase in projected future foreign income. The Company maintains its assertion that its undistributed foreign earnings are indefinitely reinvested and, accordingly, has not recorded any deferred income tax liabilities that would be due if those earnings were repatriated. As of December 31, 2023, these undistributed earnings total $1,040,580. While the majority of these earnings have already been taxed in the United States, a portion would be subject to foreign withholding and U.S. income taxes and credits if distributed. Computation of the deferred tax liability associated with unremitted earnings deemed to be indefinitely reinvested is not practicable at this time. Reserve for uncertain tax positions The following table sets forth the reconciliation of the gross amounts of unrecognized tax benefits at the beginning and ending of the periods indicated: 2023 2022 2021 Gross Unrecognized Tax Benefits at January 1 $ 18,621 $ 18,142 $ 11,230 Increases in prior years’ unrecognized tax benefits 378 223 12,283 Decreases in prior years’ unrecognized tax benefits (572) (144) (275) Increases in current year’s unrecognized tax benefits 4,395 1,807 1,088 Decreases in unrecognized tax benefits from the lapse of statutes of limitations (1,094) (1,174) (6,170) Settlements (51) (233) (14) Gross Unrecognized Tax Benefits at December 31 $ 21,677 $ 18,621 $ 18,142 Of the unrecognized tax benefit balances at December 31, 2023 and December 31, 2022, $19,241 and $17,821, respectively, would have an impact on the effective tax rate if ultimately recognized. Interest and/or penalties related to income taxes are reported as part of income tax expense. The Company had $1,773 and $859 accrued for interest related to uncertain tax positions at December 31, 2023 and December 31, 2022, respectively. Tax expense for the year ended December 31, 2023, includes net interest expense of $914, which is comprised of an interest benefit of $272 related to the adjustment of prior years’ items and interest expense of $1,186 on unrecognized tax benefits. The amounts listed above for accrued interest and interest expense do not reflect the benefit of a federal tax deduction which would be available if the interest were ultimately paid. The Company and/or its subsidiaries file federal, state and local income tax returns in the United States and various foreign jurisdictions. With few exceptions, the Company is no longer subject to income tax examinations by tax authorities for years before 2017. The Company believes that it is reasonably possible that the amount reserved for uncertain tax positions at December 31, 2023 will decrease by $10,018 over the next twelve months. This change includes the anticipated increase in reserves related to existing positions offset by settlements of issues currently under examination and the release of existing reserves due to the expiration of the statute of limitations. Although the Company’s estimate for the potential outcome for any uncertain tax issue is highly judgmental, management believes that any reasonably foreseeable outcomes related to these matters have been adequately provided for. However, future results may include favorable or unfavorable adjustments to estimated tax liabilities in the period the assessments are made or resolved or when statutes of limitation on potential assessments expire. Additionally, the jurisdictions in which earnings or deductions are realized may differ from current estimates. As a result, the effective tax rate may fluctuate significantly on a quarterly basis. The Company has operations in many countries outside of the United States and the taxes paid on those earnings are subject to varying rates. The Company is not dependent upon the favorable benefit of any one jurisdiction to an extent that loss of those benefits would have a material effect on the Company’s overall effective tax rate.

Revenue Recognition

Revenue Recognition	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Revenue Recognition	Revenue recognition The following tables set forth information about revenue disaggregated by primary geographic regions for the years ende d December 31, 2023, 2022 and 2021. The tables also include a reconciliation of disaggregated revenue with reportable segments. The Company’s reportable segments are aligned by product nature as disclosed in Note 19. Year Ended December 31, 2023 Consumer Packaging Industrial Paper Packaging All Other Total Primary geographical markets: United States $ 2,779,749 $ 1,389,492 $ 649,495 $ 4,818,736 Europe 451,990 389,261 80,096 921,347 Canada 116,595 100,095 — 216,690 Asia Pacific 100,299 233,446 1,812 335,557 Other 178,344 261,819 48,799 488,962 Total $ 3,626,977 $ 2,374,113 $ 780,202 $ 6,781,292 Year Ended December 31, 2022 Consumer Packaging Industrial Paper Packaging All Other Total Primary geographical markets: United States $ 2,960,098 $ 1,611,390 $ 660,604 $ 5,232,092 Europe 442,743 434,076 84,878 961,697 Canada 117,671 109,997 — 227,668 Asia Pacific 97,182 275,395 1,157 373,734 Other 150,262 253,705 51,394 455,361 Total $ 3,767,956 $ 2,684,563 $ 798,033 $ 7,250,552 Year Ended December 31, 2021 Consumer Packaging Industrial Paper Packaging All Other Total Primary geographical markets: United States $ 1,607,810 $ 1,421,684 $ 620,596 $ 3,650,090 Europe 444,734 408,093 88,828 941,655 Canada 117,492 94,780 — 212,272 Asia Pacific 82,882 316,841 1,280 401,003 Other 115,429 222,914 47,075 385,418 Total $ 2,368,347 $ 2,464,312 $ 757,779 $ 5,590,438 Contract assets represent goods produced without alternative use for which the Company is entitled to payment with margin prior to shipment. Upon shipment, the Company is entitled to bill the customer, and therefore amounts included in contract assets will be reduced with the recording of an account receivable as they represent an unconditional right to payment. Contract liabilities represent revenue deferred due to pricing mechanisms utilized by the Company in certain multi-year arrangements, volume rebates, and receipts of advanced payments. For multi-year arrangements with pricing mechanisms, the Company will generally defer revenue during the initial term of the arrangement, and will release the deferral over the back half of the contract term. Contract assets and liabilities are generally short in duration given the nature of products produced by the Company. The following table sets forth information about contract assets and liabilities from contracts with customers. The balances of the contract assets and liabilities are located in “Other receivables” and “Accrued expenses and other”, respectively, on the Consolidated Balance Sheets. December 31, 2023 December 31, 2022 Contract Assets $ 54,334 $ 56,008 Contract Liabilities $ (24,973) $ (22,423) Significant changes in the contract assets and liabilities balances during the twelve months ended December 31, 2023 and 2022 were as follows: December 31, 2023 December 31, 2022 Contract Asset Contract Liability Contract Asset Contract Liability Beginning balance $ 56,008 $ (22,423) $ 51,106 $ (18,993) Acquired as part of a business combination — (1,436) 8,107 (5,418) Revenue deferred or rebates accrued — (53,464) — (57,510) Recognized as revenue — 11,761 — 18,201 Rebates paid to customers — 40,589 — 41,297 Increases due to rights to consideration for customer specific goods produced, but not billed during the period 54,334 — 56,008 — Transferred to receivables from contract assets recognized at the beginning of the period and acquired as part of business combination (56,008) — (59,213) — Ending balance $ 54,334 $ (24,973) $ 56,008 $ (22,423)

Commitments and contingencies

Commitments and contingencies	12 Months Ended
	Dec. 31, 2023
Commitments and Contingencies Disclosure [Abstract]
Commitments and contingencies	Commitments and contingencies Pursuant to GAAP, accruals for estimated losses are recorded at the time information becomes available indicating that losses are probable and that the amounts are reasonably estimable. As is the case with other companies in similar industries, the Company faces exposure from actual or potential claims and legal proceedings from a variety of sources. Some of these exposures, as discussed below, have the potential to be material. Environmental matters The Company is subject to a variety of environmental and pollution control laws and regulations in all jurisdictions in which it operates. Spartanburg In connection with its acquisition of Tegrant in November 2011, the Company identified potential environmental contamination at a site in Spartanburg, South Carolina. Since the acquisition, the Company has spent a total of $2,141 on remediation of the Spartanburg site. At December 31, 2023 and 2022, the Company’s accrual for environmental contingencies related to the Spartanburg site totaled $5,259 and $5,425, respectively. The Company cannot currently estimate its potential liability, damages or range of potential loss, if any, beyond the amounts accrued with respect to this exposure. However, the Company does not believe that the resolution of this matter has a reasonable possibility of having a material adverse effect on the Company’s financial statements. Other environmental matters The Company has been named as a potentially responsible party at several other environmentally contaminated sites. All of the sites are also the responsibility of other parties. The potential remediation liabilities are shared with such other parties, and, in most cases, the Company’s share, if any, cannot be reasonably estimated at the current time. However, the Company does not believe that the resolution of these matters has a reasonable possibility of having a material adverse effect on the Company's financial statements. At December 31, 2023 and 2022, the Company’s accrual for these other sites totaled $1,992 and $1,840, respectively. Summary As of December 31, 2023 and 2022, the Company (and its subsidiaries) had accrued $7,251 and $7,265, respectively, related to environmental contingencies. These accruals are included in “ Accrued expenses and other Commitments As of December 31, 2023, the Company had long-term obligations to purchase electricity and steam, which it uses in its production processes, as well as long-term purchase commitments for certain raw materials, principally old corrugated containers. These purchase commitments require the Company to make total payments of approximately $244,867, as follows: $102,713 in 2024; $97,458 in 2025; $35,742 in 2026; $8,954 in 2027, and a total of $0 from 2028 through 2032.

Shareholders_ equity and earnin

Shareholders’ equity and earnings per share	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Shareholders' equity and earnings per share	Shareholders’ equity and earnings per share Share repurchases On April 20, 2021, the Board authorized the repurchase of the Company’s common stock in an aggregate amount of up to $350,000. A total of $137,972 remained available for share repurchases under this authorization as of December 31, 2022 and December 31, 2023. No shares were purchased under this authorization during 2023 or 2022. The following transactions occurred during 2021: • On May 6, 2021, the Company repurchased approximately 53,500 shares for $3,615 from a private stockholder based upon the average closing stock price on that day. • On May 10, 2021, the Company entered into an accelerated share repurchase agreement (“ASR Agreement”) with a financial institution to repurchase outstanding shares of the Company’s common stock. In exchange for an upfront payment of $150,000, which was funded with available cash on hand, the financial institution delivered 1,751,825 initial shares to the Company, representing 80% of the expected number of shares to be repurchased during the repurchase period based upon an estimated average repurchase price of $68.50 per share. The initial shares received were retired by the Company. The final number of shares repurchased and retired was based on the Company’s volume-weighted average share price during the repurchase period, less a discount and subject to certain adjustments. • Pursuant to the ASR Agreement, the financial institution elected to accelerate the settlement of the transaction in two tranches. On July 21, 2021, the financial institution transferred 167,743 additional shares to the Company based upon an effective settlement price of $66.52 and a notional value of $50,000, or one third of the total $150,000 prepayment. On July 26, 2021, the financial institution transferred 336,996 additional shares to the Company upon full settlement of the remaining $100,000 notional value of the transaction at the final settlement price of $66.45. • On October 25, 2021, the Company entered into a Rule 10b5-1 Repurchase Plan with a financial institution to repurchase outstanding shares of the Company's common stock pursuant to its Board authorization. The Company repurchased and retired 976,191 shares for $58,413 prior to the termination of the trading period on November 23, 2021. The costs of these share repurchases were allocated to “Capital in excess of stated value” on the Company's Consolidated Balance Sheet as of the fiscal period ended December 31, 2021. The Company occasionally repurchases shares of its common stock to satisfy employee tax withholding obligations in association with the exercise of SARs, RSUs, and PCSUs. These repurchases, which are not part of a publicly announced plan or program, totaled 175,665 shares during 2023, 79,347 shares during 2022, and 99,824 shares during 2021, at a cost of $10,617, $4,547 and $6,057, respectively. Earnings per share The following table sets forth the computation of basic and diluted earnings/(loss) per share (in thousands, except per share data): 2023 2022 2021 Numerator: Net income/(loss) attributable to Sonoco $ 474,959 $ 466,437 $ (85,477) Denominator: Weighted average common shares outstanding 98,294 97,991 99,608 Dilutive effect of share-based compensation 596 741 — Diluted outstanding shares 98,890 98,732 99,608 Per common share: Income/(Loss) available to common shareholders: Basic $ 4.83 $ 4.76 $ (.86) Diluted $ 4.80 $ 4.72 $ (.86) Cash dividends $ 2.02 $ 1.92 $ 1.80 No adjustments were made to “Net income/(loss) attributable to Sonoco” in the computations of net income/(loss) attributable to Sonoco per common share. Anti-dilutive securities Potentially dilutive securities are calculated in accordance with the treasury stock method, which assumes the proceeds from the exercise of all dilutive SARs are used to repurchase the Company’s common stock. Certain SARs are not dilutive because either the exercise price is greater than the average market price of the stock during the reporting period or assumed repurchases from proceeds from the exercise of the SARs were anti-dilutive. The average number of shares that were not dilutive and therefore not included in the computation of diluted income/ (loss) per share was as follows for the years ended December 31, 2023, 2022 and 2021 (in thousands): 2023 2022 2021 Anti-dilutive stock appreciation rights 352 373 202 These SARs may become dilutive in future periods if the market price of the Company’s common stock appreciates. Diluted earnings per share is computed by dividing net income by the weighted average shares outstanding, assuming all dilutive potential common shares were issued, unless doing so is anti-dilutive. Such securities have an anti-dilutive impact in those periods in which a loss is reported. Diluted net loss per share of common stock for the year ended December 31, 2021 is the same as basic net loss per share because otherwise dilutive securities are excluded from the computation of diluted net loss per share. The number of potentially dilutive securities excluded from the computation of diluted net loss per share during the year ended December 31, 2021 was 470. Noncontrolling interests In April 2015, the Company acquired a 67% controlling interest in Graffo Paranaense de Embalagens S/A (“Graffo”). Prior to March 31, 2022, the Company consolidated 100% of Graffo, with the partner's 33% share included in “Noncontrolling Interests” within the equity section of the balance sheet. On March 31, 2022, the Company paid $14,474 in cash to acquire the remaining 33% ownership interest from the three noncontrolling partners, which resulted in a $6,116 reduction in noncontrolling interest, a $7,080 charge to capital in excess of stated value, and a $1,278 reduction to accrued expenses and other on the Company's Consolidated Balance Sheet.

Segment reporting

Segment reporting	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Segment reporting	Segment reporting The Company’s operating and reporting structure consists of two reportable segments, Consumer Packaging and Industrial Paper Packaging, with all remaining businesses reported as All Other. The products produced and sold within the Consumer Packaging segment are generally used to package a variety of consumer products and consist primarily of round and shaped rigid paper, steel and plastic containers; metal and peelable membrane ends, closures, and components; thermoformed plastic trays; and high-barrier flexible packaging. The primary products produced and sold within the Industrial Paper Packaging segment include paperboard tubes, cones, and cores; paper-based protective packaging; and uncoated recycled paperboard. The primary products produced within the All Other group of businesses consist of a variety of packaging materials, including plastic, paper, foam, and various other specialty materials. Effective January 1, 2024, the Company will integrate its flexible packaging and thermoforming packaging businesses within the Consumer Packaging segment in order to streamline operations, enhance customer service and better position the business for accelerated growth. As a result, the Company will change its operating and reporting structure to reflect the way it plans to manage its operations, evaluate performance, and allocate resources going forward. Therefore, in future reporting periods, the Company’s consumer thermoforming businesses will move from the All Other group of businesses to the Consumer Packaging segment. The Company’s Industrial Paper Packaging segment will not be affected by these changes. As of and for the year ended December 31, 2023, there were no changes to the manner in which the Company reviewed financial information at the segment level; therefore, these changes had no impact on our reporting structure. The following table sets forth financial information about each of the Company’s business segments and All Other group of businesses: Years ended December 31 Consumer Packaging Industrial Paper Packaging All Other Corporate Consolidated Total Revenue 2023 $ 3,639,759 $ 2,475,935 $ 789,781 $ — $ 6,905,475 2022 3,774,957 2,818,778 808,069 — 7,401,804 2021 2,373,583 2,578,379 768,476 — 5,720,438 Intersegment Sales 1 2023 $ 12,782 $ 101,822 $ 9,579 $ — $ 124,183 2022 7,001 134,215 10,036 — 151,252 2021 5,236 114,067 10,697 — 130,000 Sales to Unaffiliated Customers 2023 $ 3,626,977 $ 2,374,113 $ 780,202 $ — $ 6,781,292 2022 3,767,956 2,684,563 798,033 — 7,250,552 2021 2,368,347 2,464,312 757,779 — 5,590,438 Income/(Loss) Before Income Taxes 2 2023 $ 382,063 $ 313,545 $ 103,745 $ (184,521) $ 614,832 2022 526,028 327,859 65,978 (348,583) 571,282 2021 274,926 226,798 63,060 (725,766) (160,982) Identifiable Assets 3 2023 $ 3,682,650 $ 2,559,026 $ 825,003 $ 125,278 $ 7,191,957 2022 3,825,675 2,079,326 871,800 276,139 7,052,940 2021 1,956,688 1,971,293 886,647 258,607 5,073,235 Depreciation, Depletion and Amortization 4 2023 $ 124,483 $ 104,722 $ 24,519 $ 87,264 $ 340,988 2022 111,599 91,944 24,854 80,427 308,824 2021 78,802 91,141 25,822 49,419 245,184 Capital Expenditures 2023 $ 186,109 $ 111,619 $ 24,838 $ 40,511 $ 363,077 2022 127,478 145,021 21,177 35,093 328,769 2021 60,532 150,225 22,780 22,482 256,019 1 Intersegment sales are recorded at a market-related transfer price. 2 Included in Corporate above are restructuring/asset impairment charges, changes in LIFO inventory reserves, net, gains or losses from derivatives, gains or losses from the divestiture of businesses and other assets, acquisition, integration and divestiture-related costs, amortization of acquired intangibles, and other non-operating income and expenses associated with the following segments: Consumer Packaging Industrial Paper All Other Corporate Total 2023 $ (56,237) $ 17,064 $ (24,486) $ (120,862) $ (184,521) 2022 (138,343) (40,805) (18,800) (150,635) (348,583) 2021 (25,983) (2,570) (23,312) (673,900) (725,765) The remaining amounts reported as Corporate consist of: interest expense; interest income; non-operating pension costs; and portions of acquisition, integration and divestiture-related costs, restructuring, other income, net, and other non-operating income and expenses not associated with a particular segment. 3 Identifiable assets are those assets used by each segment in its operations. Corporate assets consist primarily of cash and cash equivalents, investments in affiliates, headquarters facilities, deferred income taxes and prepaid expenses. 4 Depreciation and depletion incurred at Corporate are allocated to the reportable segments. Geographic regions Sales to unaffiliated customers and long-lived assets by geographic region are as follows: 2023 2022 2021 Sales to Unaffiliated Customers United States $ 4,818,736 $ 5,232,092 $ 3,650,090 Europe 921,347 961,697 941,655 Canada 216,690 227,668 212,272 Asia Pacific 335,557 373,734 401,003 Other 488,962 455,361 385,418 Total $ 6,781,292 $ 7,250,552 $ 5,590,438 Long-lived Assets United States $ 3,504,438 $ 3,240,011 $ 2,078,342 Europe 653,730 607,996 545,211 Canada 113,888 96,210 104,913 Asia Pacific 158,301 157,030 157,084 Other 196,504 85,233 68,949 Total $ 4,626,861 $ 4,186,480 $ 2,954,499 Sales are attributed to countries/regions based upon the plant location from which products are shipped. Long-lived assets are comprised of investments in affiliates, property, plant and equipment, and goodwill and other intangible assets (see Notes 1, 6 and 8).

Accumulated other comprehensive

Accumulated other comprehensive loss	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Accumulated other comprehensive loss	Accumulated other comprehensive loss The following table summarizes the components of accumulated other comprehensive loss and the changes in accumulated other comprehensive loss, net of tax as applicable, for the years ended December 31, 2023 and 2022: Foreign Currency Items Defined Benefit Pension Items Gains and Losses on Cash Flow Hedges Accumulated Other Comprehensive Loss Balance at December 31, 2021 $ (269,076) $ (91,397) $ 1,048 $ (359,425) Other comprehensive (loss)/income before reclassifications (72,987) (3,471) 3,244 (73,214) Amounts reclassified from accumulated other comprehensive loss to net income 3,747 3,895 (5,593) 2,049 Amounts reclassified from accumulated other comprehensive loss to fixed assets — — 507 507 Other comprehensive (loss)/income (69,240) 424 (1,842) (70,658) Balance at December 31, 2022 $ (338,316) $ (90,973) $ (794) $ (430,083) Other comprehensive income/(loss) before reclassifications 68,705 (16,305) 6,622 59,022 Amounts reclassified from accumulated other comprehensive loss to net income 2,033 7,651 (5,177) 4,507 Amounts reclassified from accumulated other comprehensive loss to fixed assets — — 292 292 Other comprehensive income/(loss) 70,738 (8,654) 1,737 63,821 Balance at December 31, 2023 $ (267,578) $ (99,627) $ 943 $ (366,262) The following table summarizes the amounts reclassified from accumulated other comprehensive loss and the affected line items in the consolidated statements of net income for the years ended December 31, 2023 and 2022: Amount Reclassified from Accumulated Other Comprehensive Loss Details about Accumulated Other Comprehensive Loss Components Year Ended December 31, 2023 Year Ended December 31, 2022 Affected Line Item in the Consolidated Statements of Net Income Foreign currency items Loss on Russia restructuring (see Note 4) $ — $ (3,747) Restructuring/Asset impairment charges Loss on RTS Packaging investment (see Note 3) (2,033) — Other income, net (2,033) (3,747) Net income/(loss) Defined benefit pension items (see Note 14) Pension-related loss upon purchase of remaining interest in RTS Packaging joint venture (4,756) — Other income, net Effect of settlement loss (1,010) (479) Non-operating pension cost Effect of curtailment loss — (43) Non-operating pension cost Amortization of defined benefit pension items (4,458) (6,472) Non-operating pension cost (10,224) (6,994) Income/(loss) before income taxes 2,573 3,099 Provision for/(Benefit from) income taxes (7,651) (3,895) Net income/(loss) Gains and losses on cash flow hedges (see Note 11) Foreign exchange contracts 10,860 3,460 Net Sales Foreign exchange contracts (3,728) (2,852) Cost of sales Commodity contracts (32) 6,948 Cost of sales 7,100 7,556 Income/(loss) before income taxes (1,923) (1,963) Provision for/(Benefit from) income taxes 5,177 5,593 Net income/(loss) Amounts reclassified to net income from accumulated other comprehensive loss $ (4,507) $ (2,049) Net income/(loss) The following table summarizes the tax expense/(benefit) for the components of other comprehensive income/(loss): For the year ended December 31, 2023 For the year ended December 31, 2022 Before Tax Amount Tax After Tax Amount Before Tax Amount Tax After Tax Amount Foreign currency items: Other comprehensive income/(loss) before reclassifications $ 67,411 $ 1,294 $ 68,705 $ (72,987) $ — $ (72,987) Amounts reclassified from accumulated other comprehensive loss to net income 2,033 — 2,033 3,747 — 3,747 Net other comprehensive income/(loss) from foreign currency items 69,444 1,294 70,738 (69,240) — (69,240) Defined benefit pension items: Other comprehensive (loss)/ income before reclassifications (21,815) 5,510 (16,305) (3,365) (106) (3,471) Amounts reclassified from accumulated other comprehensive loss to net income 10,224 (2,573) 7,651 6,994 (3,099) 3,895 Net other comprehensive (loss)/income from defined benefit pension items (a) (11,591) 2,937 (8,654) 3,629 (3,205) 424 Cash flow hedges: Other comprehensive income/(loss) before reclassifications 9,081 (2,459) 6,622 4,312 (1,068) 3,244 Amounts reclassified from accumulated other comprehensive loss to net income (7,100) 1,923 (5,177) (7,556) 1,963 (5,593) Amounts reclassified from accumulated other comprehensive loss to fixed assets 401 (109) 292 805 (298) 507 Net other comprehensive (loss)/income from cash flow hedges 2,382 (645) 1,737 (2,439) 597 (1,842) Other comprehensive income/(loss) $ 60,235 $ 3,586 $ 63,821 $ (68,050) $ (2,608) $ (70,658) (a)

Subsequent Events

Subsequent Events	12 Months Ended
	Dec. 31, 2023
Subsequent Events [Abstract]
Subsequent Events	Subsequent events On January 30, 2024, the Company entered into a definitive agreement to sell its Protective Solutions business, part of the All Other group of businesses, to Black Diamond Capital Management, LLC for an estimated $80,000 in cash. The transaction is expected to be completed in the first half of 2024, subject to the satisfaction or waiver of customary closing conditions. This business provides foam components and integrated material solutions for various industrial end markets. The business operates nine manufacturing facilities and has approximately 900 employees. This sale is the result of the Company’s continuing evaluation of its business portfolio and is consistent with its strategic and investment priorities.

Schedule II - Valuation and Qua

Schedule II - Valuation and Qualifying Accounts	12 Months Ended
	Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]
Schedule of valuation and qualifying accounts disclosure	Column A Column B Column C - Additions Column D Column E Description Balance at Beginning of Year Charged to Costs and Expenses Charged to Other Deductions Balance at End of Year 2023 Allowance for Doubtful Accounts $ 16,879 $ 7,361 $ 180 1 $ 2,759 2 $ 21,661 LIFO Reserve 51,342 (11,814) 3 — — 39,528 Valuation Allowance on Deferred Tax Assets 82,046 4,487 (15,872) 4 — 5 70,661 2022 Allowance for Doubtful Accounts $ 19,651 $ (327) $ (108) 1 $ 2,337 2 $ 16,879 LIFO Reserve 22,900 28,442 3 — — 51,342 Valuation Allowance on Deferred Tax Assets 93,992 (10,582) (1,440) 4 (76) 5 82,046 2021 Allowance for Doubtful Accounts $ 20,920 $ (824) $ (18) 1 $ 427 2 $ 19,651 LIFO Reserve 20,317 2,583 3 — — 22,900 Valuation Allowance on Deferred Tax Assets 128,435 (33,532) (866) 4 45 5 93,992 1 Includes translation adjustments and other insignificant adjustments. 2 Includes amounts written off. 3 Includes adjustments based on pricing and inventory levels. 4 Includes translation adjustments and increases to deferred tax assets which were previously fully reserved. 5 Includes utilization of capital loss carryforwards, net operating loss carryforwards and other deferred tax assets. All other schedules not included have been omitted because they are not required, are not applicable or the required information is given in the financial statements or notes thereto.

Pay vs Performance Disclosure

Pay vs Performance Disclosure - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pay vs Performance Disclosure
Net income/(loss) attributable to Sonoco	$ 474,959	$ 466,437	$ (85,477)

Insider Trading Arrangements

Insider Trading Arrangements	3 Months Ended
	Dec. 31, 2023
Trading Arrangements, by Individual
Rule 10b5-1 Arrangement Adopted	false
Non-Rule 10b5-1 Arrangement Adopted	false
Rule 10b5-1 Arrangement Terminated	false
Non-Rule 10b5-1 Arrangement Terminated	false

Summary of significant accoun_2

Summary of significant accounting policies (Policies)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Basis of presentation	Basis of presentation The Consolidated Financial Statements include the accounts of Sonoco Products Company and its majority-owned subsidiaries (the “Company” or “Sonoco”) after elimination of intercompany accounts and transactions.
Estimates and assumptions	Estimates and assumptions The preparation of financial statements in conformity with accounting principles generally accepted in the United States of America (U.S. GAAP) requires management to make estimates and assumptions that affect the reported amount of assets and liabilities at the date of the financial statements and the reported amounts of revenues and expenses during the reporting period. Actual results could differ from those estimates.
Revenue recognition	Revenue recognition The Company records revenue generally at a point in time when control transfers to the customer either upon shipment or delivery, depending on the terms of sale. Additionally, in certain cases, control transfers over time in conjunction with production where the Company is entitled to payment with margin for products produced that are customer specific and without alternative use. For products that meet these two criteria, the Company recognizes over time revenue under the input method as goods are produced. The Company commonly enters into Master Supply Arrangements with customers to provide goods and/or services over specific time periods. Customers submit purchase orders with quantities and prices to create a contract for accounting purposes. Shipping and handling expenses are considered a fulfillment cost, and are included in “Cost of Sales,” and freight charged to customers is included in “Net Sales” in the Company's Consolidated Statements of Income. The Company has rebate agreements with certain customers. These rebates are recorded as reductions of sales and are accrued using sales data and rebate percentages specific to each customer agreement. Accrued customer rebates are included in “Accrued expenses and other” in the Company’s Consolidated Balance Sheets. Payment terms under the Company's arrangements are typically short term in nature. The Company provides prompt payment discounts to certain customers if invoices are paid within a predetermined period. Prompt payment discounts are determinable within a short period after the originating sale and like sales returns, are treated as a reduction of revenue.
Accounts receivable and allowance for doubtful accounts	Accounts receivable and allowance for doubtful accounts The Company’s trade accounts receivable are non-interest bearing and are recorded at the invoiced amounts. The allowance for doubtful accounts represents the Company’s best estimate of the amount of probable credit losses in existing accounts receivable. The Company performs an evaluation of lifetime expected credit losses inherent in its accounts receivable at each balance sheet date. Such an evaluation includes consideration of historical loss experience, trends in customer payment frequency, present economic conditions, and judgment about the future financial health of its customers and industry sector. The allowance for doubtful accounts is monitored on a regular basis and adjustments are made as needed to ensure that the account properly reflects the Company’s best estimate of uncollectible trade accounts receivable. Account balances are charged off against the allowance for doubtful accounts when the Company determines that the receivable will not be recovered.
Accounts payable and supply chain financing	Accounts payable and supply chain financing
Research and development	Research and development
Restructuring and asset impairment	Restructuring and asset impairment
Cash and cash equivalents	Cash and cash equivalents Cash equivalents are composed of highly liquid investments with an original maturity to the Company of three months or less when purchased. Cash equivalents are recorded at cost, which approximates fair market value. The Company’s cash and cash equivalents are primarily placed with large sophisticated creditworthy financial institutions thereby limiting the Company’s credit exposure.
Inventories	Inventories The majority of the Company’s inventories are accounted for using the first-in, first-out (FIFO) method and are stated at the lower of cost or net realizable value. The last-in, first-out (LIFO) method is used for the valuation of certain of the Company’s domestic inventories, primarily metal, internally manufactured paper and paper purchased from third parties, and a pproxim ated 13% and 11% of total inventories at December 31, 2023 and 2022, respectively. Inventories accounted for using the LIFO method are stated at the lower of cost or market. If the FIFO method of accounting had been used for all inventories, total inventory would have been higher by $39,528 and $51,342 at December 31, 2023 and 2022, respectively.
Property, plant and equipment	Property, plant and equipment Property, plant and equipment assets represent the original cost of land, buildings and equipment, less depreciation, computed under the straight-line method over the estimated useful lives of the assets, and are reviewed for impairment whenever events indicate the carrying value may not be recoverable. Equipment lives generally range from 3 to 11 years, and buildings range from 15 to 40 years. Expenditures for repairs and maintenance are charged to expense as incurred. When properties are retired or otherwise disposed of, the cost and accumulated depreciation are eliminated from the asset and related allowance accounts, respectively. Gains or losses upon disposal are credited or charged to income as incurred. The Company sold its timberland properties in March 2023. Prior to the sale, these timber resources were stated at cost and depletion expense was recognized based on the estimated number of units of timber cut during the period.
Leases	Leases At the inception of a contract, the Company assesses whether the contract is, or contains, a lease. The assessment is based on (1) whether the contract involves the use of a distinct identified asset, (2) whether the Company obtains the right to substantially all the economic benefit from the use of the asset throughout the period, and (3) whether the Company has the right to direct the use of the asset. When the Company determines a lease exists, a leased asset and corresponding lease liability are recorded on its consolidated balance sheet. Lease contracts with a term of 12 months or less are not recorded on the consolidated balance sheet in conjunction with the Company's practical expedient election under ASC 842, “Leases.” Leased assets represent the Company’s right to use an underlying asset during the lease term and are reviewed for impairment whenever events indicate the carrying value may not be recoverable. Lease liabilities represent the Company’s obligation arising from the lease. The Company’s leased assets and liabilities may include options to extend or terminate the lease when it is reasonably certain that the Company will exercise those options. The Company has lease agreements with non-lease components that relate to lease components (e.g., common area maintenance such as cleaning or landscaping, etc.). The Company accounts for each lease and any non-lease components associated with that lease as a single lease component for all underlying asset classes in accordance with the scope of the lease accounting standard. Leased assets and liabilities are recognized at commencement date based on the present value of lease payments over the lease term. When the implicit rate in the Company’s leases is not readily determinable, the Company calculates its lease liabilities using discount rates based upon the Company’s incremental secured borrowing rate, which contemplates and reflects a particular geographical region’s interest rate for the leases active within that region of the Company’s global operations. The Company further utilizes a portfolio approach by assigning a “short” rate to contracts with lease terms of 10 years or less and a “long” rate for contracts greater than 10 years. Lease payments may be fixed or variable, however, only fixed payments or in-substance fixed payments are included in determining the lease liability. Variable lease payments are recognized in operating expenses in the period in which the expense is paid during the lease term. The Company recognizes fixed lease expense for operating leases on a straight-line basis over the lease term. For finance leases, the Company recognizes interest expense on the lease liability using the effective interest method over the lease term and the finance lease asset balance is amortized on a straight-line basis.
Goodwill	Goodwill Goodwill is not amortized. The Company assesses its goodwill for impairment annually during the third quarter, or from time to time when warranted by the facts and circumstances surrounding individual reporting units or the Company as a whole. In performing the impairment test, the Company compares the fair value of the reporting unit with its carrying amount, and if the carrying value of the reporting unit exceeds the fair value of that reporting unit, an impairment charge is recognized for the excess. In determining the fair value of the reporting units, management considered both the income approach and the market approach. Fair value was estimated using a discounted cash flow model based on projections of future years’ operating results and associated cash flows combined with comparable trading and transaction multiples based on guideline public companies. The calculated estimated fair value of the reporting unit reflects a number of significant management assumptions and estimates including the forecast of sales growth, gross profit margins, and discount rates. Changes in these assumptions could materially impact the estimated fair value. The Company’s projections incorporate management's best estimates of the expected future results, which include expectations related to new and retained business and future operating margins. Projected future cash flows are then discounted to present value using a discount rate management believes is commensurate with the risks inherent in the cash flows.
Impairment of long-lived, intangible and other assets	Impairment of long-lived, intangible and other assets Other intangible assets are amortized using the straight-line method when management has determined that the straight-line method approximates the pattern of consumption of the respective intangible assets, or in relation to the specific pattern of consumption of the assets if the straight-line method does not provide a fair approximation of the consumption of benefits. The useful lives of the Company’s intangible assets generally range from 3 to 40 years. The Company has no intangibles with indefinite lives. The Company evaluates its intangible assets for impairment whenever indicators of impairment exist. Assumptions and estimates used in the evaluation of potential impairment can result in adjustments affecting the carrying values of long-lived, intangible and other assets and the recognition of impairment expense in the Company’s Consolidated Financial Statements. The Company evaluates its long-lived assets (property, plant and equipment), definite-lived intangible assets and other assets (including right of use lease assets, notes receivable and equity and other investments) for impairment whenever indicators of impairment exist, or when it commits to sell the asset. If the sum of the undiscounted expected future cash flows from a long-lived asset, definite-lived intangible, or other asset group is less than the carrying value of that asset group, an asset impairment charge is recognized. Key assumptions and estimates used in the projection of expected future cash flows generally include price levels, sales growth, profit margins and asset life. The amount of an impairment charge, if any, is calculated as the excess of the asset’s carrying value over its fair value, generally represented by the discounted future cash flows from that asset or, in the case of assets the Company evaluates for sale, estimated sale proceeds less costs to sell. The Company takes into consideration historical data and experience together with all other relevant information available when estimating the fair values of its assets. However, fair values that could be realized in actual transactions may differ from the estimates used to evaluate impairment. In addition, changes in the assumptions and estimates may result in a different conclusion regarding impairment.
Income taxes	Income taxes
Derivatives	Derivatives The Company uses derivatives to mitigate the effect of fluctuations in some of its raw material and energy costs, foreign currencies, and, from time to time, interest rates. The Company purchases commodities such as metal and energy, generally at market or at fixed prices that are established with the vendor as part of the purchase process for quantities expected to be consumed in the ordinary course of business. The Company may enter into commodity futures or swaps to manage the effect of price fluctuations. The Company may use foreign currency forward contracts and other risk management instruments to manage exposure to changes in foreign currency cash flows and the translation of monetary assets and liabilities on the Company’s consolidated financial statements. The Company is exposed to interest-rate fluctuations as a result of using debt as a source of financing for its operations. The Company may from time to time use traditional, unleveraged interest rate swaps to manage its exposure to interest rate movements. Additionally, the Company elected the normal purchase, normal sale scope exception for physical commodity contracts that meet the definition of a derivative. Derivative instruments, to the extent in an asset position, expose the Company to credit loss in the event of nonperformance by the counterparties to the derivative agreements. The Company manages its exposure to counterparty credit risk through minimum credit standards, diversification of counterparties and procedures to monitor concentrations of credit risk. The Company may enter into financial derivative contracts that may contain credit-risk-related contingent features, which could result in a counterparty requesting immediate payment or demanding immediate and ongoing full overnight collateralization on derivative instruments in net liability positions.
Stock-Based Compensation Plans	Share-Based Compensation Plans The Company utilizes share-based compensation in the form of restricted stock units, performance contingent restricted stock units, and other share-based awards. The fair value of the Company’s restricted stock units is equal to the closing price of the Company’s stock on the date of grant discounted for any projected dividends that are not eligible to be received during the vesting period.The amount of share-based compensation expense associated with performance contingent restricted stock units is based on estimates of future performance using measures defined in the stock plan descriptions for each award granted. As of December 31, 2023, these performance measures include the following: • Adjusted earnings per share — three-year sum of forecasted future and historical annual adjusted earnings per share for the three-year measurement period associated with each award; and • Return on invested capital — three-year simple average of annual returns calculated by dividing 1) adjusted operating profit after tax (derived from historical or projected earnings) by 2) the average of total historical or projected debt plus equity for the respective annual periods. For the most recent award grant in 2023, the performance payout will be subject to adjustment by a total stock return modifier as determined by the Company’s relative performance within its targeted peer group. Changes in estimates regarding the future achievement of these performance measures may result in significant fluctuations from period to period in the amount of share-based compensation expense recognized in the Company’s Consolidated Financial Statements.
Pension and Postretirement Benefit Plans	Pension and Postretirement Benefit Plans The Company provides non-contributory defined benefit pension plans for certain of its employees in the United States, Mexico, Belgium, Germany, Greece, France, and Turkey. The Company also sponsors contributory defined benefit pension plans covering certain of its employees in the United Kingdom, Canada and the Netherlands, and provides postretirement healthcare and life insurance benefits to a limited number of its retirees and their dependents in the United States and Canada, based on certain age and/or service eligibility requirements. The actuarial valuations used to evaluate the plans employ key assumptions that can have a significant effect on the calculated amounts. The Company adjusts its discount rates at the end of each fiscal year based on yield curves of high-quality debt instruments over durations that match the expected benefit payouts of each plan. The expected rate of return assumption is derived by taking into consideration the targeted plan asset allocation, projected future returns by asset class and active investment management. A third-party asset return model is used to develop an expected range of returns on plan investments over a 12- to 15-year period, with the expected rate of return selected from a best estimate range within the total range of projected results. The Company periodically re-balances its plan asset portfolio in order to maintain the targeted allocation levels. The rate of compensation increase assumption is generally based on salary and incentive compensation increases.
Business combinations	Business combinations The Company’s acquisitions of businesses are accounted for in accordance with ASC 805, “Business Combinations.” The Company recognizes the identifiable assets acquired, the liabilities assumed, and any noncontrolling interests in an acquired business at their fair values as of the date of acquisition. Goodwill is measured as the excess of consideration transferred, also measured at fair value, over the net of the acquisition date fair values of the identifiable assets acquired and liabilities assumed. The acquisition method of accounting requires the Company to make significant estimates and assumptions regarding the fair values of the elements of a business combination as of the date of acquisition, including the fair values of identifiable intangible assets; property, plant and equipment; deferred tax asset valuation allowances; liabilities including those related to debt, pensions and other postretirement plans; uncertain tax positions; contingent consideration and contingencies. This method also requires the Company to refine these estimates over a measurement period not to exceed one year to reflect new information obtained about facts and circumstances that existed as of the acquisition date that, if known, would have affected the measurement of the amounts recognized as of that date. If the Company is required to adjust provisional amounts that were recorded for the fair values of assets and liabilities in connection with acquisitions, these adjustments could have a material impact on its financial condition and results of operations. Significant estimates and assumptions in estimating the fair value of acquired patents, customer lists, trademarks, proprietary technology, and other identifiable intangible assets include future cash flows that the Company expects to generate from the acquired assets, discount rate, customer attrition rate, and long-term revenue growth projections. Projecting discounted future cash flows requires the Company to make significant estimates regarding projected revenues, projected earnings before interest, taxes, depreciation, and amortization margins, discount rates and customer attrition rates. If the subsequent actual results and updated projections of the underlying business activity change compared with the assumptions and projections used to develop these values, the Company could record impairment charges. In addition, the Company has estimated the economic lives of certain acquired assets, and these lives are used to calculate depreciation on property, plant and equipment and amortization expense on definite-lived intangible assets. If the estimates of the economic lives change, depreciation or amortization expenses could be increased or decreased, or the acquired assets could be impaired. For leases acquired in a business combination, the Company measures the lease liability at the present value of the remaining lease payments, as if the acquired lease were a new lease of the Company at the acquisition date. The Company measures the right-of-use asset at the same amount as the lease liability as adjusted to reflect favorable or unfavorable terms of the lease when compared with market terms.
Reportable segments	Reportable segments
Contingencies	Contingencies
Fair value measurement	Fair value is defined as an exit price representing the amount that would be received to sell an asset or paid to transfer a liability in an orderly transaction between market participants. Fair value is a market-based measurement that is determined based on assumptions that market participants would use in pricing an asset or liability. A three-tier fair value hierarchy is used to prioritize the inputs in measuring fair value as follows: Level 1 – Observable inputs such as quoted market prices in active markets; Level 2 – Inputs, other than quoted prices in active markets, that are observable either directly or indirectly; and Level 3 – Unobservable inputs for which there is little or no market data, which require the reporting entity to develop its own assumptions.
Fair value of financial instruments	As discussed i n Note 11, the Company uses derivatives to mitigate the effect of commodity fluctuations, foreign currency fluctuations and, from time to time, interest rate movements. Fair value measurements for the Company’s derivatives are classified under Level 2 because such measurements are estimated based on observable inputs such as interest rates, yield curves, spot and future commodity prices, and spot and future exchange rates.
Foreign currency translation	Foreign currency translation
New accounting pronouncements	New accounting pronouncements In December 2023, the Financial Accounting Standards Board (“FASB”) issued Accounting Standards Update (“ASU”) 2023-09, “Income Taxes (Topic 740): Improvements to Income Tax Disclosures”, which modifies the rules on income tax disclosures to require disaggregated information about a reporting entity’s effective tax rate reconciliation as well as information on income taxes paid. The standard is intended to benefit investors by providing more detailed income tax disclosures that would be useful in making capital allocation decisions. The guidance is effective for annual periods beginning after December 15, 2024, with early adoption permitted. ASU 2023-09 should be applied on a prospective basis, but retrospective application is permitted. The Company is currently evaluating the potential impact of adopting this new guidance on our consolidated financial statements and related disclosures. In November 2023, the FASB issued ASU 2023-07, “Segment Reporting (Topic 280): Improvements to Reportable Segment Disclosures”, which is intended to improve reportable segment disclosure requirements, primarily through enhanced disclosures about significant segment expenses. The purpose of the amendment is to enable investors to better understand an entity’s overall performance and assess potential future cash flows. The guidance is effective for fiscal years beginning after December 15, 2023, and interim periods within fiscal years beginning after December 15, 2024, with early adoption permitted. The guidance is to be applied retrospectively to all prior periods presented in the financial statements. The Company is currently evaluating the potential impact of adopting this new guidance on our consolidated financial statements and related disclosures. In September 2022, the FASB issued ASU 2022-04 “Liabilities—Supplier Finance Programs (Subtopic 405-50): Disclosure of Supplier Finance Program Obligations.” The amendments in this update require that a buyer in a supplier finance program disclose qualitative and quantitative information about its supplier finance programs in each annual reporting period, including a description of key payment terms, and a rollforward of the outstanding obligation as of the end of the annual period. The amendments are effective for fiscal years beginning after December 15, 2022, including interim periods within those fiscal years, except for the amendment on rollforward information, which is effective for fiscal years beginning after December 15, 2023. The Company adopted this standard in the first quarter of 2023, with the exception of the amendment on rollforward information, which will be adopted in the first quarter of 2024. The adoption of the new standard did not have a material effect on the consolidated financial statements. In March 2022, the FASB issued ASU 2022-02, “Financial Instruments—Credit Losses (Topic 326): Troubled Debt Restructurings and Vintage Disclosures.” The amendments in this update eliminate the accounting guidance for troubled debt restructurings while enhancing disclosure requirements for certain loan refinancings and restructurings by creditors when a borrower is experiencing financial difficulty. The amendments also require that an entity disclose current-period gross write offs by year of origination for financing receivables and net investments in leases. The amendments in ASU 2022-02 were effective for the Company as of January 1, 2023, and their adoption did not have a material effect on the consolidated financial statements. In October 2021, the FASB issued ASU 2021-08, “Business Combinations: Accounting for Contract Assets and Contract Liabilities.” The amendments in this Update primarily require that the acquirer recognize and measure contract assets and contract liabilities acquired in a business combination as if the acquirer had originated the related revenue contracts rather than at fair value as of the acquisition date. Generally, this would result in an acquirer recognizing and measuring the acquired contract assets and contract liabilities consistent with how they were recognized and measured in the acquiree's financial statements in accordance with GAAP. The amendments in this ASU are effective on a prospective basis for fiscal years, and interim periods within those fiscal years, beginning after December 15, 2022. The adoption of this ASU did not materially affect the Company’s consolidated financial statements. In March 2020, the FASB issued ASU 2020-04, “Facilitation of the Effects of Reference Rate Reform on Financial Reporting.” ASU 2020-04 provided temporary optional expedients and exceptions to applying U.S. GAAP guidance on contract modifications and hedge accounting to ease the financial reporting burdens of the expected market transition from the London Interbank Offered Rate (“LIBOR”) and other interbank offered rates to alternative reference rates, such as the Secured Overnight Financing Rate (“SOFR”). In January 2021, the FASB issued ASU 2021-01, “Reference Rate Reform,” to clarify that certain optional expedients and exceptions in Topic 848 for contract modifications and hedge accounting apply to derivative instruments that use an interest rate for margining, discounting, or contract price alignment that is modified as a result of reference rate reform. The sunset accounting standard provision associated with ASU 2020-04 was originally set for December 31, 2022; however, in December 2022, the FASB issued ASU 2022-06, “Reference Rate Reform: Deferral of the Sunset Date of Topic 848,” which defers the sunset date of Topic 848 from December 31, 2022 to December 31, 2024, after which entities will no longer be permitted to apply the relief in Topic 848.This pronouncement, which was effective as of its December 31, 2022 issuance date, did not have a material impact on the Company's consolidated financial statements. The Company does not expect that the market transition of LIBOR to SOFR will have a material impact on its consolidated financial statements.

Summary of significant accoun_3

Summary of significant accounting policies (Tables)	12 Months Ended
	Dec. 31, 2023
Accounting Policies [Abstract]
Affiliated companies over which the company exercised significant influence	Affiliated companies over which the Company exercised a significant influence at December 31, 2023, included: Entity Ownership Interest Percentage at December 31, 2023 Cascades Conversion, Inc. 50.0 % Cascades Sonoco, Inc. 50.0 % ISI Robotics, LLC 20.0 % Showa Products Company Ltd. 22.2 % Papertech Energía, S.L. 25.0 % Weidenhammer New Packaging, LLC 40.0 %

Acquisitions and divestitures (

Acquisitions and divestitures (Tables)	12 Months Ended
	Dec. 31, 2023
Business Combination and Asset Acquisition [Abstract]
Summary of the Purchase Consideration Transferred for the Acquisitions	The following table provides a summary of the purchase consideration (as defined under ASC 805) transferred for the acquisition of the remaining interest in RTS Packaging and the acquisition of the Chattanooga Mill: Purchase Consideration Cash consideration, net of cash acquired $ 313,388 Fair value of previously held interest in RTS Packaging 59,472 Final working capital settlement 452 Settlement of preexisting relationships 1,235 Purchase consideration transferred $ 374,547
Schedule of Preliminary Fair Value Of Assets Acquired And Measurement Period Adjustments	The Company’s preliminary fair values of the assets acquired and liabilities assumed in the acquisition of the remaining interest in RTS Packaging, and the Chattanooga Mill, and Inapel acquisitions, as well as revised preliminary fair values reflecting adjustments made during the measurement period for RTS Packaging and the Chattanooga Mill, are as follows: RTS and Chattanooga Mill Inapel Initial Allocation Measurement Period Adjustments Preliminary Allocation Preliminary Allocation Trade accounts receivable $ 17,488 $ — $ 17,488 $ 30,301 Other receivables — — — 6,088 Inventories 20,209 (947) 19,262 9,269 Prepaid expenses 2,720 (589) 2,131 1,430 Property, plant and equipment 73,483 753 74,236 11,456 Right of use asset - operating leases 34,604 290 34,894 217 Other intangible assets 199,560 (8,995) 190,565 8,653 Goodwill 92,657 14,909 107,566 15,704 Other assets 2,465 (412) 2,053 793 Payable to suppliers (7,320) — (7,320) (15,899) Accrued expenses and other (12,436) (25) (12,461) (4,606) Accrued wages and other compensation (2,731) — (2,731) (1,127) Notes payable and current portion of long-term debt (24) — (24) — Noncurrent operating lease liabilities (29,905) — (29,905) (117) Pension and other postretirement benefits (10,761) (768) (11,529) — Long-term debt (1,942) — (1,942) — Deferred income taxes (3,419) (2,502) (5,921) (2,934) Other long-term liabilities (3,293) 1,478 (1,815) — Net assets acquired $ 371,355 $ 3,192 $ 374,547 $ 59,228 During 2023, the Company finalized its valuations of the assets acquired and the liabilities assumed in the Metal Packaging, Skjern, and Nordeste acquisitions. As a result, the following measurement period adjustments were made to the previously disclosed preliminary fair values of assets acquired and liabilities assumed during the year ended December 31, 2023. Measurement Period Adjustments for the year ended December 31, 2023 Metal Packaging Skjern Nordeste Other receivables $ — $ — $ (186) Inventories (73) 14 (38) Property, plant and equipment (247) 4,921 494 Other intangible assets — (3,488) 3,031 Goodwill 439 3,135 (3,400) Accrued expenses and other (119) (203) — Taxes Payable — (3,416) — Additional cash consideration $ — $ 963 $ (99)
Schedule Of Proforma Supplemental Information	The following table presents the financial results for Metal Packaging from the date of acquisition through December 31, 2022: Supplemental Information January 26 to Metal Packaging December 31, 2022 Net sales $ 1,035,020 Net income $ 62,777 The following table presents the Company’s pro forma consolidated results for the years ended December 31, 2022 and December 31, 2021, assuming the acquisition of Metal Packaging had occurred on January 1, 2021. This pro forma information is presented for informational purposes only and does not purport to represent the results of operations that would have been achieved if the acquisition had been completed at the beginning of 2021, nor is it necessarily indicative of future consolidated results. Pro Forma Supplemental Information Years Ended Consolidated December 31, 2022 December 31, 2021 Net sales $ 7,300,140 $ 6,425,771 Net income/(loss) attributable to Sonoco $ 528,818 $ (145,570)

Restructuring and asset impai_2

Restructuring and asset impairment (Tables)	12 Months Ended
	Dec. 31, 2023
Restructuring and Related Activities [Abstract]
Schedule of Restructuring and Related Costs	Year Ended December 31, 2023 2022 2021 Restructuring and restructuring-related asset impairment charges $ 56,933 $ 46,815 $ 9,176 Other asset impairments — 10,095 5,034 Restructuring/Asset impairment charges $ 56,933 $ 56,910 $ 14,210 The table below sets forth restructuring and restructuring-related asset impairment charges by type incurred: Year Ended December 31, 2023 2022 2021 Severance and Termination Benefits $ 26,631 $ 17,983 $ 13,097 Asset Impairment/Disposal of Assets 19,603 9,442 (9,116) Other Costs 10,699 19,390 5,195 Total restructuring and restructuring-related asset impairment charges $ 56,933 $ 46,815 $ 9,176 The table below sets forth restructuring and restructuring-related asset impairment charges by reportable segment: Year Ended December 31, 2023 2022 2021 Consumer Packaging $ 8,059 $ 12,433 $ 3,427 Industrial Paper Packaging 38,754 16,019 (1,642) All Other 7,623 (166) 2,969 Corporate 2,497 18,529 4,422 Total restructuring and restructuring-related asset impairment charges $ 56,933 $ 46,815 $ 9,176
Schedule of Restructuring Reserve by Type of Cost	The following table sets forth the activity in the restructuring accrual included in “Accrued expenses and other” on the Company’s Consolidated Balance Sheets: Accrual Activity Severance and Termination Benefits Asset Impairment/ Disposal of Assets Other Costs Total Liability, December 31, 2021 $ 10,917 $ — $ 1,873 $ 12,790 2022 charges 17,983 9,442 19,390 46,815 Cash (payments)/receipts (14,024) 7,138 (19,836) (26,722) Asset write downs/disposals — (16,580) — (16,580) Foreign currency translation (199) — (35) (234) Liability, December 31, 2022 $ 14,677 $ — $ 1,392 $ 16,069 2023 charges 26,631 19,603 10,699 56,933 Cash (payments)/receipts (27,000) 6,842 (10,522) (30,680) Asset write downs/disposals — (26,445) — (26,445) Foreign currency translation 7 — 69 76 Liability, December 31, 2023 $ 14,315 $ — $ 1,638 $ 15,953

Property, plant and equipment (

Property, plant and equipment (Tables)	12 Months Ended
	Dec. 31, 2023
Property, Plant and Equipment [Abstract]
Schedule of Property, Plant and Equipment	Details of the Company’s property, plant and equipment at December 31 are as follows: 2023 2022 Land $ 135,518 $ 131,362 Timber resources — 42,202 Buildings 740,138 664,012 Machinery and equipment 3,825,134 3,528,545 Construction in progress 269,061 226,701 4,969,851 4,592,822 Accumulated depreciation and depletion (3,063,714) (2,882,423) Property, plant and equipment, net $ 1,906,137 $ 1,710,399

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2023
Leases [Abstract]
Balance sheet locations and values of the Company's lease assets and lease liabilities	The following table sets forth the balance sheet location and values of the Company’s lease assets and lease liabilities at December 31, 2023 and December 31, 2022: Classification Balance Sheet Location December 31, 2023 December 31, 2022 Lease Assets Operating lease assets Right of Use Asset - Operating Leases $ 314,944 $ 296,781 Finance lease assets Other Assets 94,026 103,467 Total lease assets $ 408,970 $ 400,248 Lease Liabilities Current operating lease liabilities Accrued expenses and other $ 54,803 $ 52,306 Current finance lease liabilities Notes payable and current portion of long-term debt 18,791 19,015 Total current lease liabilities 73,594 71,321 Noncurrent operating lease liabilities Noncurrent Operating Lease Liabilities 265,454 250,994 Noncurrent finance lease liabilities Long-term Debt, net of current portion 70,203 83,905 Total noncurrent lease liabilities 335,657 334,899 Total lease liabilities $ 409,251 $ 406,220
Components of the company's total lease cost	The following table sets forth the components of the Company’s total lease cost for the years ended December 31, 2023, 2022, and 2021: Lease Cost 2023 2022 2021 Operating lease cost (a) $ 54,990 $ 51,890 $ 48,158 Finance lease cost: Amortization of lease asset (a) (b) 13,110 12,241 5,747 Interest on lease liabilities (c) 4,447 4,751 1,384 Variable lease cost (a) (d) 40,983 30,269 26,198 Impairment charges (e) — 293 148 Total lease cost $ 113,530 $ 99,444 $ 81,635 (a) Production-related and administrative amounts are included in cost of sales and selling, general and administrative expenses, respectively. (b) Included in depreciation and amortization. (c) Included in interest expense. (d) Also includes short-term lease costs, which are deemed immaterial. (e) Impairment charges are included in “Restructuring/asset impairment charges” in the Company’s Consolidated Statements of Income. See Note 4 for more information.
Five-year maturity schedule of Company's lease liabilities	The following table sets forth the five-year maturity schedule of the Company’s lease liabilities as of December 31, 2023: Maturity of Lease Liabilities Operating Leases Finance Leases Total 2024 $ 55,688 $ 19,163 $ 74,851 2025 48,400 21,186 69,586 2026 38,379 16,727 55,106 2027 34,125 4,791 38,916 2028 31,329 4,277 35,606 Beyond 2028 198,533 38,922 237,455 Total lease payments 406,454 105,066 511,520 Less: Interest 86,197 16,072 102,269 Lease Liabilities $ 320,257 $ 88,994 $ 409,251
Five-year maturity schedule of Company's lease liabilities	The following table sets forth the five-year maturity schedule of the Company’s lease liabilities as of December 31, 2023: Maturity of Lease Liabilities Operating Leases Finance Leases Total 2024 $ 55,688 $ 19,163 $ 74,851 2025 48,400 21,186 69,586 2026 38,379 16,727 55,106 2027 34,125 4,791 38,916 2028 31,329 4,277 35,606 Beyond 2028 198,533 38,922 237,455 Total lease payments 406,454 105,066 511,520 Less: Interest 86,197 16,072 102,269 Lease Liabilities $ 320,257 $ 88,994 $ 409,251
Company's weighted average remaining lease term and discount rates used	The following tables set forth the Company’s weighted average remaining lease term and discount rates used in the calculation of its outstanding lease liabilities at December 31, 2023, 2022, and 2021, along with other lease-related information for the years ended December 31, 2023, 2022, and 2021: Lease Term and Discount Rate 2023 2022 2021 Weighted-average remaining lease term (years): Operating leases 10.7 11.2 11.8 Finance leases 8.8 9.2 13.5 Weighted-average discount rate: Operating leases 4.97% 4.27% 4.09% Finance leases 4.89% 4.79% 2.86% Other Information 2023 2022 2021 Cash paid for amounts included in the measurement of lease liabilities: Operating cash flows used by operating leases $ 54,877 $ 52,198 $ 50,479 Operating cash flows used by finance leases $ 4,447 $ 4,751 $ 1,384 Financing cash flows used by finance leases $ 15,559 $ 12,687 $ 4,699 Leased assets obtained in exchange for new operating lease liabilities $ 33,059 $ 36,158 $ 20,505 Leased assets obtained in exchange for new finance lease liabilities $ 8,354 $ 10,091 $ 14,643 Modification to leased assets for increase in operating lease liabilities $ 2,938 $ 2,807 $ 15,936 Modification to leased assets for increase/(decrease) in finance lease liabilities $ 18 $ (642) $ 9,586 Termination reclasses to decrease operating lease assets $ (15,314) $ (4,285) $ (5,267) Termination reclasses to decrease operating lease liabilities $ (16,169) $ (4,537) $ (5,602) Termination reclasses to decrease finance lease assets $ (4,564) $ (1,351) $ (125) Termination reclasses to decrease finance lease liabilities $ (6,462) $ (87) $ (130)

Goodwill and other intangible_2

Goodwill and other intangible assets (Tables)	12 Months Ended
	Dec. 31, 2023
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Changes in Goodwill	Changes in the carrying amount of goodwill by segment for the year ended December 31, 2023, are as follows: Consumer Packaging Industrial Paper Packaging All Other Total Balance as of January 1, 2023 $ 898,625 $ 394,826 $ 381,860 $ 1,675,311 Acquisitions 15,704 92,657 — 108,361 Divestitures — (6,375) — (6,375) Measurement period adjustments 439 14,644 — 15,083 Foreign currency translation 5,669 10,654 1,951 18,274 Balance as of December 31, 2023 $ 920,437 $ 506,406 $ 383,811 $ 1,810,654
Schedule of other intangible assets	Details at December 31 are as follows: 2023 2022 Other Intangible Assets, Gross: Patents $ 29,304 $ 29,303 Customer lists 1,282,689 1,092,232 Trade names 41,836 34,220 Proprietary technology 56,857 57,720 Other 6,916 6,721 Other Intangible Assets, Gross $ 1,417,602 $ 1,220,196 Accumulated Amortization: Patents $ (19,549) $ (17,889) Customer lists (493,778) (417,034) Trade names (18,845) (15,892) Proprietary technology (29,013) (25,113) Other (2,747) (2,670) Accumulated Amortization $ (563,932) $ (478,598) Other Intangible Assets, Net $ 853,670 $ 741,598

Supply Chain Financing (Tables)

Supply Chain Financing (Tables)	12 Months Ended
	Dec. 31, 2023
Investments, Debt and Equity Securities [Abstract]
Schedule Of Supply Chain Financing Program Obligations	The following table sets forth the balance sheet location and values of the obligations of the Company under its SCF Programs at December 31, 2023 and December 31, 2022: Balance Sheet Line Item December 31, 2023 December 31, 2022 Payable to suppliers (a) $ 35,847 $ 52,415 Notes payable and current portion of long-term debt (b) $ — $ 63,448 (a) The net payment of these obligations is included in “Net cash provided by operating activities” in the Company’s Consolidated Statements of Cash Flows. (b) The net payment of these obligations is included in “Net cash provided/(used) by financing activities” in the Company’s Consolidated Statements of Cash Flows.

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2023
Debt Disclosure [Abstract]
Debt instruments	Details of the Company’s debt at December 31 were as follows: 2023 2022 Syndicated term loan due August 2028 $ 572,025 $ — Syndicated term loan due January 2025 — 299,644 Syndicated term loan due December 2023 — 399,246 1.80% notes due February 2025 399,149 398,369 2.25% notes due February 2027 298,421 297,910 2.85% notes due February 2032 495,785 495,264 3.125% notes due May 2030 596,480 595,911 5.75% notes due November 2040 536,246 536,214 Other foreign denominated debt, average rate of 10.4% in 2023 and 5.7% in 2022 78,800 20,668 Finance lease obligations 88,994 102,920 Other debt 17,100 76,077 Total debt $ 3,083,000 $ 3,222,223 Less: Notes payable and current portion of long-term debt 47,132 502,440 Long-term debt $ 3,035,868 $ 2,719,783
Schedule of extinguishment of debt	Upon expiration of the tender on May 25, 2021, the Company repurchased 10.53% of its outstanding 5.75% notes for a total cash cost of $81,961, as shown below: Principal Amount Tendered Premium and Other Amounts Paid Total Cash 5.75% notes due November 2040 $ 63,206 $ 18,755 $ 81,961
Schedule of debt maturities	The principal requirements of debt maturing in the next five years are: 2024 2025 2026 2027 2028 Debt maturities by year $ 47,132 $ 449,774 $ 21,778 $ 310,355 $ 583,655

Financial instruments and der_2

Financial instruments and derivatives (Tables)	12 Months Ended
	Dec. 31, 2023
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Schedule of Carrying Amounts and Fair Values of Financial Instruments	The following table sets forth the carrying amounts and fair values of the Company’s significant financial instruments for which the carrying amount differs from the fair value. December 31, 2023 December 31, 2022 Carrying Amount Fair Value Carrying Amount Fair Value Long-term debt, net of current portion $ 3,035,868 $ 2,890,009 $ 2,719,783 $ 2,477,884
Schedule of Net Positions of Foreign Contracts	The net positions of these contracts at December 31, 2023, were as follows (in thousands): Currency Action Quantity Colombian peso purchase 22,276,464 Mexican peso purchase 579,207 Polish zloty purchase 131,417 Danish Krone purchase 48,225 Swedish Krone sell (6,827) Czech koruna purchase 109,362 Euro purchase 2,291 Turkish lira purchase 57,507 Brazilian real purchase 54,302 British pound sell (435) Canadian dollar purchase 35,016
Schedule of Net positions of Other Derivatives Contract	Currency Action Quantity Colombian peso Purchase 59,655,780 Indonesian rupiah Purchase 7,711,880 Mexican peso Purchase 403,952 Turkish lira Purchase 5,593 Canadian dollar Purchase 5,923 Thai Baht Sell (10,459)
Schedule of Location and Fair Values of Derivative Instruments	Fair Value at December 31 Description Balance Sheet Location 2023 2022 Derivatives designated as hedging instruments: Commodity Contracts Prepaid expenses $ 67 $ 10 Commodity Contracts Other assets — 8 Commodity Contracts Accrued expenses and other (108) (155) Commodity Contracts Other liabilities — (35) Foreign Exchange Contracts Prepaid expenses 2,525 1,251 Foreign Exchange Contracts Accrued expenses and other (1,024) (2,114) Net investment hedge Prepaid expenses 5,567 — Net investment hedge Other liabilities (10,640) — Derivatives not designated as hedging instruments: Commodity Contracts Prepaid expenses $ 12 $ 5 Commodity Contracts Other assets — 251 Commodity Contracts Accrued expenses and other (6,782) (8,599) Commodity Contracts Other liabilities — (295) Foreign Exchange Contracts Prepaid expenses 130 115 Foreign Exchange Contracts Accrued expenses and other (159) (169)
Schedule of Effect of Derivative Instruments on Financial Performance	The following tables set forth the effect of the Company’s derivative instruments on financial performance for the year ended December 31, 2023 and December 31, 2022, excluding the gains or losses on foreign currency cash flow hedges that were reclassified from accumulated other comprehensive loss to the carrying value of the capitalized expenditures: Description Amount of Gain or (Loss) Recognized in OCI on Derivatives Location of Gain or (Loss) Reclassified from Accumulated OCI Into Income Amount of Gain or (Loss) Reclassified from Accumulated OCI Into Income Derivatives in Cash Flow Hedging Relationships: Year Ended December 31, 2023 Foreign Exchange Contracts $ 8,982 Net sales $ 10,860 Cost of sales $ (3,728) Commodity Contracts $ 99 Cost of sales $ (32) Year Ended December 31, 2022 Foreign Exchange Contracts $ (1,009) Net sales $ 3,460 Cost of sales $ (2,852) Commodity Contracts $ 5,321 Cost of sales $ 6,948 Description Gain or (Loss) Recognized Location of Gain or (Loss) Recognized in Income Statement Derivatives not Designated as Hedging Instruments: Year Ended December 31, 2023 Commodity Contracts $ (19,087) Cost of Sales Foreign Exchange Contracts $ 7,560 Selling, general and administrative Year Ended December 31, 2022 Commodity Contracts $ 1,831 Cost of sales Foreign Exchange Contracts $ 355 Selling, general and administrative Year Ended December 31, 2023 Year Ended December 31, 2022 Description Net Sales Cost of Sales Net Sales Cost of Sales Total amount of income and expense line items presented in the Consolidated Statements of Income $ 10,860 $ (3,760) $ 3,460 $ 4,096 Gain or (loss) on cash flow hedging relationships: Foreign exchange contracts: Amount of gain or (loss) reclassified from accumulated other comprehensive income into net income $ 10,860 $ (3,728) $ 3,460 $ (2,852) Commodity contract: Amount of gain or (loss) reclassified from accumulated other comprehensive income into net income $ — $ (32) $ — $ 6,948

Fair value measurements (Tables

Fair value measurements (Tables)	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Schedule of Assets and Liabilities Measured on Recurring Basis	The following tables set forth information regarding the Company’s financial assets and financial liabilities that are measured at fair value on a recurring basis: Description December 31, 2023 Assets measured at NAV (f) Level 1 Level 2 Level 3 Hedge derivatives, net: Commodity contracts $ (41) $ — $ — $ (41) $ — Foreign exchange contracts 1,502 — — 1,502 — Net investment hedge (5,073) — — (5,073) — Non-hedge derivatives, net: Commodity contracts (6770) — — (6770) — Foreign exchange contracts (29) — — (29) — Postretirement benefit plan assets: Common Collective(a) 12,958 12,958 — — — Mutual funds(b) 45,931 — — 45,931 — Fixed income securities(c) 242,702 63,849 — 178,853 — Short-term investments(d) 4,175 — — 4,175 — Real estate funds(e) 400 400 — — — Cash and accrued income 2,634 — 2,634 — — Total postretirement benefit plan assets $ 308,800 $ 77,207 $ 2,634 $ 228,959 $ — Description December 31, 2022 Assets measured at NAV (f) Level 1 Level 2 Level 3 Hedge derivatives, net: Commodity contracts $ (172) $ — $ — $ (172) $ — Foreign exchange contracts (863) — — (863) — Non-hedge derivatives, net: Commodity contracts (8,638) — — (8,638) — Foreign exchange contracts (54) — — (54) — Postretirement benefit plan assets: Common Collective(a) 6,497 6,497 — — — Mutual funds(b) 50,467 — — 50,467 — Fixed income securities(c) 198,628 32,927 — 165,701 — Short-term investments(d) 1,099 — — 1,099 — Real estate funds(e) 680 680 — — — Cash and accrued income 8,504 — 8,504 — — Total postretirement benefit plan assets $ 265,875 $ 40,104 $ 8,504 $ 217,267 $ — a. Common collective trust investments consist of domestic and international large and mid capitalization equities, including emerging markets and funds invested in both short-term and long-term bonds. Underlying investments are generally valued at closing prices from national exchanges. Commingled funds, private securities, and limited partnerships are valued at unit values or NAVs provided by the investment managers. b. Mutual fund investments are comprised of equity securities of corporations with large capitalizations and also include funds invested in corporate equities in international and emerging markets and funds invested in long-term bonds, which are valued at closing prices from national exchanges. c. Fixed income securities include funds that invest primarily in government securities and long-term bonds. Underlying investments are generally valued at closing prices from national exchanges, fixed income pricing models, and independent financial analysts. Fixed income commingled funds are valued at unit values provided by the investment managers. d. Short-term investments include several money market funds used for managing overall liquidity. Underlying investments are generally valued at closing prices from national exchanges. Commingled funds are valued at unit values provided by the investment managers. e. Includes investments in real estate funds (including office, industrial, residential and retail). Underlying real estate securities are generally valued at closing prices from national exchanges. f. Certain assets that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been classified in the fair value hierarchy.

Share-based compensation plans

Share-based compensation plans (Tables)	12 Months Ended
	Dec. 31, 2023
Share-Based Payment Arrangement [Abstract]
Activity related to restricted stock units	The activity related to RSUs for the year ended December 31, 2023 is as follows: Nonvested Vested Total Average Grant Date Fair Value Per Share Outstanding, December 31, 2022 462,395 73,309 535,704 $ 53.23 Granted 325,771 — 325,771 $ 56.87 Vested (172,786) 172,786 — Converted (179,198) (179,198) $ 54.12 Cancelled (24,148) — (24,148) $ 55.79 Dividend equivalents 2,213 1,918 4,131 $ 56.97 Outstanding, December 31, 2023 593,445 68,815 662,260 $ 54.71
Activity related to performance contingent restricted stock units	The activity related to PCSUs for the year ended December 31, 2023 is as follows: Nonvested Vested Total Average Grant Date Fair Value per Share Outstanding, December 31, 2022 599,382 302,400 901,782 $52.81 Granted 205,178 — 205,178 $55.04 Performance adjustments (129,224) — (129,224) $55.04 Vested (225,530) 225,530 — Converted — (291,818) (291,818) $51.68 Cancelled (31,403) — (31,403) $54.08 Dividend equivalents — 380 380 $56.99 Outstanding, December 31, 2023 418,403 236,492 654,895 $53.51
Company's SARs	The activity related to the Company’s SARs for the year ended December 31, 2023 is as follows: Nonvested Vested Total Weighted- average Exercise Price Outstanding, December 31, 2022 — 764,806 764,806 $ 54.98 Vested — — — Granted — — — $ — Exercised — (26,671) (26,671) $ 49.96 Forfeited/Expired — (8,620) (8,620) $ — Outstanding, December 31, 2023 — 729,515 729,515 $ 55.13 Exercisable, December 31, 2023 — 729,515 729,515 $ 55.13
Schedule of other share-based compensation, activity	The activity related to deferred compensation for equity award units granted to both employees and non-employee directors combined is as follows: Total Outstanding, December 31, 2022 287,015 Deferred 36,254 Converted (8,406) Dividend equivalents 9,739 Outstanding, December 31, 2023 324,602

Employee benefit plans (Tables)

Employee benefit plans (Tables)	12 Months Ended
	Dec. 31, 2023
Retirement Benefits [Abstract]
Components of net periodic benefit cost	The components of net periodic benefit cost include the following: 2023 2022 2021 Retirement Plans Service cost $ 2,918 $ 3,304 $ 3,916 Interest cost 18,101 10,562 24,186 Expected return on plan assets (9,451) (10,302) (22,888) Amortization of prior service cost 926 913 900 Amortization of net actuarial loss 4,300 6,240 16,503 Effect of settlement loss 1,010 479 550,706 Effect of curtailment loss — 43 — Net periodic benefit cost $ 17,804 $ 11,239 $ 573,323 Retiree Health and Life Insurance Plans Service cost $ 230 $ 320 $ 374 Interest cost 507 258 197 Expected return on plan assets (313) (439) (444) Amortization of prior service credit — — — Amortization of net actuarial gain (768) (681) (744) Net periodic benefit income $ (344) $ (542) $ (617)
Plans' obligations	The following tables set forth the Plans’ obligations and assets at December 31: Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Change in Benefit Obligation Benefit obligation at January 1 $ 352,843 $ 514,633 $ 11,244 $ 13,745 Service cost 2,918 3,304 230 320 Interest cost 18,101 10,562 507 258 Plan participant contributions 60 50 — — Plan amendments 306 665 11,637 — Actuarial loss/(gain) 15,663 (124,982) (266) (1,825) Benefits paid (26,703) (22,268) (788) (1,224) Impact of foreign exchange rates 8,707 (27,273) 7 (30) Effect of settlements (2,373) (1,736) — — Effect of curtailments — (112) — — Acquisitions 43,934 — — — Benefit obligation at December 31 $ 413,456 $ 352,843 $ 22,571 $ 11,244
Fair value of plan assets	Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Change in Plan Assets Fair value of plan assets at January 1 $ 253,125 $ 417,105 $ 12,750 $ 13,942 Actual return on plan assets 15,968 (119,714) 553 (532) Company contributions 13,908 14,677 754 652 Plan participant contributions 60 50 — — Benefits paid (26,703) (22,268) (788) (1,224) Impact of foreign exchange rates 10,388 (33,800) — — Effect of settlements (2,373) (1,736) — — Expenses paid (1,108) (1,189) (56) (88) Acquisitions 32,322 — — — Fair value of plan assets at December 31 $ 295,587 $ 253,125 $ 13,213 $ 12,750 Funded Status of the Plans $ (117,869) $ (99,718) $ (9,358) $ 1,506
Recognized amounts in consolidated balance sheets	Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Total Recognized Amounts in the Consolidated Balance Sheets Noncurrent assets $ 26,599 $ 30,322 $ — $ 2,919 Current liabilities (9,797) (9,478) (1,801) (1,049) Noncurrent liabilities (134,671) (120,562) (7,557) (364) Net (liability)/asset $ (117,869) $ (99,718) $ (9,358) $ 1,506
Amounts recognized in other comprehensive loss/(income)	Items not yet recognized as a pre-tax component of net periodic benefit cost that are included in Accumulated Other Comprehensive Loss as of December 31, 2023 and 2022, are as follows: Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2023 2022 Net actuarial loss/(gain) $ 114,957 $ 109,558 $ (6,120) $ (6,437) Prior service cost 5,557 6,053 11,637 — $ 120,514 $ 115,611 $ 5,517 $ (6,437) The pre-tax amounts recognized in Other Comprehensive Loss/(Income) include the following: Retirement Plans Retiree Health and Life Insurance Plans 2023 2022 2021 2023 2022 2021 Adjustments arising during the period: Net actuarial loss/(gain) $ 10,709 $ 4,839 $ (63,684) $ (451) $ (761) $ (412) Prior service cost 430 678 837 11,637 — — Net settlements/curtailments (1,010) (522) (550,706) — — — Amortization recognized during the period: Net actuarial (loss)/gain (4,300) (6,240) (16,503) 768 681 744 Prior service (cost)/credit (926) (913) (900) — — — Total recognized in other comprehensive loss/(income) $ 4,903 $ (2,158) $ (630,956) $ 11,954 $ (80) $ 332 Total recognized in net periodic benefit cost and other comprehensive loss/(income) $ 22,707 $ 9,081 $ (57,633) $ 11,610 $ (622) $ (285)
Company's projected benefit payments	The following table sets forth the Company’s projected benefit payments for the next ten years: Year Retirement Plans Retiree Health and Life Insurance Plans 2024 $ 29,104 $ 1,853 2025 $ 29,914 $ 1,885 2026 $ 32,028 $ 2,044 2027 $ 31,621 $ 1,906 2028 $ 31,606 $ 2,159 2029-2033 $ 160,293 $ 9,793
Major actuarial assumptions used in determining PBO, ABO and net periodic cost	The following tables set forth the major actuarial assumptions used in determining the benefit obligation and net periodic benefit cost: Weighted-average assumptions used to determine benefit obligations at December 31 U.S. Retirement Plans U.S. Retiree Health and Life Insurance Plans Foreign Plans Discount Rate 2023 4.84 % 4.68 % 4.79 % 2022 5.01 % 4.92 % 4.97 % Rate of Compensation Increase 2023 — % 3.03 % 3.11 % 2022 — % 2.99 % 3.29 % Weighted-average assumptions used to determine net periodic benefit cost for years ended December 31 U.S. Retirement Plans U.S. Retiree Health and Life Insurance Plans Foreign Plans Discount Rate 2023 5.01 % 4.92 % 4.97 % 2022 2.77 % 2.48 % 2.22 % 2021 2.32 % 2.04 % 1.70 % Expected Long-term Rate of Return 2023 2.48 % 2.45 % 4.70 % 2022 3.27 % 3.18 % 3.00 % 2021 3.27 % 2.01 % 3.69 % Rate of Compensation Increase 2023 — % 2.99 % 3.29 % 2022 — % 3.01 % 3.21 % 2021 — % 3.03 % 3.20 %
Health care cost trend rates related to U.S. plan	The U.S. Retiree Health and Life Insurance Plan makes up approximately 98% of the Retiree Health liability. Therefore, the following information relates to the U.S. plan only. Healthcare Cost Trend Rate Pre-age 65 Post-age 65 2023 6.25 % 7.25 % 2022 5.80 % 6.50 % Ultimate Trend Rate Pre-age 65 Post-age 65 2023 4.50 % 4.50 % 2022 4.50 % 4.50 % Year at which the Rate Reaches the Ultimate Trend Rate Pre-age 65 Post-age 65 2023 2033 2033 2022 2030 2030
Weighted-average asset allocations	The following table sets forth the weighted-average asset allocations of the Company’s retirement plans at 2023 and 2022, by asset category. Asset Category U.S. RTS U.K. Canada Equity securities 2023 22.2 % 18.6 % 20.0 % 29.4 % 2022 23.4 % N/A 22.6 % 34.0 % Debt securities 2023 76.6 % 81.2 % 79.1 % 70.6 % 2022 72.9 % N/A 76.3 % 66.0 % Cash and short-term investments 2023 1.2 % 0.2 % 0.9 % — % 2022 3.7 % N/A 1.1 % — % Total 2023 100.0 % 100.0 % 100.0 % 100.0 % 2022 100.0 % N/A 100.0 % 100.0 % The following table sets forth the weighted-average asset allocations by asset category of the Company’s retiree health and life insurance plan. Asset Category 2023 2022 Equity securities —% —% Debt securities 100.0% 100.0% Cash —% —% Total 100.0% 100.0%

Income taxes (Tables)

Income taxes (Tables)	12 Months Ended
	Dec. 31, 2023
Income Tax Disclosure [Abstract]
Provision for taxes on income	The provision for taxes on income for the years ended December 31 consists of the following: 2023 2022 2021 Pretax income Domestic $ 400,241 $ 363,518 $ (342,951) Foreign 214,591 207,764 181,969 Total pretax income $ 614,832 $ 571,282 $ (160,982) Current Federal $ 79,200 $ 55,016 $ 21,247 State 16,681 15,997 15,212 Foreign 65,617 59,762 55,018 Total current $ 161,498 $ 130,775 $ 91,477 Deferred Federal $ (5,447) $ (2,495) $ (120,243) State (2,249) (5,441) (39,709) Foreign (4,524) (4,330) 1,045 Total deferred $ (12,220) $ (12,266) $ (158,907) Total taxes $ 149,278 $ 118,509 $ (67,430)
Deferred tax liabilities/(assets)	Deferred tax (liabilities)/assets are comprised of the following at December 31: 2023 2022 Property, plant and equipment $ (137,880) $ (104,162) Intangibles (119,225) (104,171) Leases (48,832) (89,226) Outside basis in Metal Packaging (68,867) (74,092) Gross deferred tax liabilities $ (374,804) $ (371,651) Retiree health benefits $ 513 $ 1,222 Foreign loss carryforwards 62,250 79,460 U.S. Federal loss and credit carryforwards 39,131 36,529 Capital loss carryforwards 3,817 3,626 U.S. State loss and credit carryforwards 21,321 20,961 Capitalized research and development costs 87,743 45,826 Employee benefits 51,829 42,641 Leases 50,704 89,416 Accrued liabilities and other assets 58,699 56,601 Gross deferred tax assets $ 376,007 $ 376,282 Valuation allowance on deferred tax assets $ (70,661) $ (82,046) Total deferred taxes, net $ (69,458) $ (77,415)
Reconciliation of U.S. federal statutory tax rate to actual consolidated tax expense	A reconciliation of the U.S. federal statutory tax rate to the actual provision for/(benefit from) income taxes is as follows: 2023 2022 2021 Statutory tax rate $ 129,115 21.0 % $ 119,945 21.0 % $ (33,806) 21.0 % State income taxes, net of federal tax benefit 16,051 2.6 % 13,149 2.3 % (15,863) 9.9 % Valuation allowance 4,486 0.7 % (10,477) (1.8) % (33,576) 20.9 % Tax examinations including change in reserve for uncertain tax positions 2,183 0.4 % 567 0.1 % 5,665 (3.5) % Adjustments to prior year deferred taxes (2,489) (0.4) % (2,110) (0.4) % 1,239 (0.8) % Foreign earnings taxed at other than U.S. rates 13,704 2.2 % 12,334 2.2 % 9,659 (6.0) % Divestiture of business 464 0.1 % — — % (808) 0.5 % Effect of tax rate changes 387 0.1 % (2,151) (0.4) % 275 (0.2) % Foreign withholding taxes 4,635 0.8 % 4,670 0.8 % 8,107 (5.0) % Tax credits (18,841) (3.1) % (14,077) (2.5) % (21,936) 13.6 % Global intangible low-taxed income (GILTI) 2,930 0.5 % 2,851 0.5 % 11,323 (7.0) % Foreign-derived intangible income (1,106) (0.2) % (657) (0.1) % (202) 0.1 % Foreign currency gain/(loss) on distributions of previously taxed income (2,614) (0.4) % (1,280) (0.2) % 3,365 (2.1) % Other, net 373 0.1 % (4,255) (0.7) % (872) 0.5 % Provision for/(Benefit from) income taxes $ 149,278 24.3 % $ 118,509 20.7 % $ (67,430) 41.9 %
Reconciliation of gross amounts of unrecognized tax benefits	The following table sets forth the reconciliation of the gross amounts of unrecognized tax benefits at the beginning and ending of the periods indicated: 2023 2022 2021 Gross Unrecognized Tax Benefits at January 1 $ 18,621 $ 18,142 $ 11,230 Increases in prior years’ unrecognized tax benefits 378 223 12,283 Decreases in prior years’ unrecognized tax benefits (572) (144) (275) Increases in current year’s unrecognized tax benefits 4,395 1,807 1,088 Decreases in unrecognized tax benefits from the lapse of statutes of limitations (1,094) (1,174) (6,170) Settlements (51) (233) (14) Gross Unrecognized Tax Benefits at December 31 $ 21,677 $ 18,621 $ 18,142

Revenue Recognition (Tables)

Revenue Recognition (Tables)	12 Months Ended
	Dec. 31, 2023
Revenue from Contract with Customer [Abstract]
Schedule of Disaggregation of Revenue	The following tables set forth information about revenue disaggregated by primary geographic regions for the years ende d December 31, 2023, 2022 and 2021. The tables also include a reconciliation of disaggregated revenue with reportable segments. The Company’s reportable segments are aligned by product nature as disclosed in Note 19. Year Ended December 31, 2023 Consumer Packaging Industrial Paper Packaging All Other Total Primary geographical markets: United States $ 2,779,749 $ 1,389,492 $ 649,495 $ 4,818,736 Europe 451,990 389,261 80,096 921,347 Canada 116,595 100,095 — 216,690 Asia Pacific 100,299 233,446 1,812 335,557 Other 178,344 261,819 48,799 488,962 Total $ 3,626,977 $ 2,374,113 $ 780,202 $ 6,781,292 Year Ended December 31, 2022 Consumer Packaging Industrial Paper Packaging All Other Total Primary geographical markets: United States $ 2,960,098 $ 1,611,390 $ 660,604 $ 5,232,092 Europe 442,743 434,076 84,878 961,697 Canada 117,671 109,997 — 227,668 Asia Pacific 97,182 275,395 1,157 373,734 Other 150,262 253,705 51,394 455,361 Total $ 3,767,956 $ 2,684,563 $ 798,033 $ 7,250,552 Year Ended December 31, 2021 Consumer Packaging Industrial Paper Packaging All Other Total Primary geographical markets: United States $ 1,607,810 $ 1,421,684 $ 620,596 $ 3,650,090 Europe 444,734 408,093 88,828 941,655 Canada 117,492 94,780 — 212,272 Asia Pacific 82,882 316,841 1,280 401,003 Other 115,429 222,914 47,075 385,418 Total $ 2,368,347 $ 2,464,312 $ 757,779 $ 5,590,438
Schedule of Contract Asset and Liabilities	The following table sets forth information about contract assets and liabilities from contracts with customers. The balances of the contract assets and liabilities are located in “Other receivables” and “Accrued expenses and other”, respectively, on the Consolidated Balance Sheets. December 31, 2023 December 31, 2022 Contract Assets $ 54,334 $ 56,008 Contract Liabilities $ (24,973) $ (22,423) Significant changes in the contract assets and liabilities balances during the twelve months ended December 31, 2023 and 2022 were as follows: December 31, 2023 December 31, 2022 Contract Asset Contract Liability Contract Asset Contract Liability Beginning balance $ 56,008 $ (22,423) $ 51,106 $ (18,993) Acquired as part of a business combination — (1,436) 8,107 (5,418) Revenue deferred or rebates accrued — (53,464) — (57,510) Recognized as revenue — 11,761 — 18,201 Rebates paid to customers — 40,589 — 41,297 Increases due to rights to consideration for customer specific goods produced, but not billed during the period 54,334 — 56,008 — Transferred to receivables from contract assets recognized at the beginning of the period and acquired as part of business combination (56,008) — (59,213) — Ending balance $ 54,334 $ (24,973) $ 56,008 $ (22,423)

Shareholders_ equity and earn_2

Shareholders’ equity and earnings per share (Tables)	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Earnings per share	The following table sets forth the computation of basic and diluted earnings/(loss) per share (in thousands, except per share data): 2023 2022 2021 Numerator: Net income/(loss) attributable to Sonoco $ 474,959 $ 466,437 $ (85,477) Denominator: Weighted average common shares outstanding 98,294 97,991 99,608 Dilutive effect of share-based compensation 596 741 — Diluted outstanding shares 98,890 98,732 99,608 Per common share: Income/(Loss) available to common shareholders: Basic $ 4.83 $ 4.76 $ (.86) Diluted $ 4.80 $ 4.72 $ (.86) Cash dividends $ 2.02 $ 1.92 $ 1.80
Shares not included in computations of diluted income per share	The average number of shares that were not dilutive and therefore not included in the computation of diluted income/ (loss) per share was as follows for the years ended December 31, 2023, 2022 and 2021 (in thousands): 2023 2022 2021 Anti-dilutive stock appreciation rights 352 373 202

Segment reporting (Tables)

Segment reporting (Tables)	12 Months Ended
	Dec. 31, 2023
Segment Reporting [Abstract]
Financial segment information	The following table sets forth financial information about each of the Company’s business segments and All Other group of businesses: Years ended December 31 Consumer Packaging Industrial Paper Packaging All Other Corporate Consolidated Total Revenue 2023 $ 3,639,759 $ 2,475,935 $ 789,781 $ — $ 6,905,475 2022 3,774,957 2,818,778 808,069 — 7,401,804 2021 2,373,583 2,578,379 768,476 — 5,720,438 Intersegment Sales 1 2023 $ 12,782 $ 101,822 $ 9,579 $ — $ 124,183 2022 7,001 134,215 10,036 — 151,252 2021 5,236 114,067 10,697 — 130,000 Sales to Unaffiliated Customers 2023 $ 3,626,977 $ 2,374,113 $ 780,202 $ — $ 6,781,292 2022 3,767,956 2,684,563 798,033 — 7,250,552 2021 2,368,347 2,464,312 757,779 — 5,590,438 Income/(Loss) Before Income Taxes 2 2023 $ 382,063 $ 313,545 $ 103,745 $ (184,521) $ 614,832 2022 526,028 327,859 65,978 (348,583) 571,282 2021 274,926 226,798 63,060 (725,766) (160,982) Identifiable Assets 3 2023 $ 3,682,650 $ 2,559,026 $ 825,003 $ 125,278 $ 7,191,957 2022 3,825,675 2,079,326 871,800 276,139 7,052,940 2021 1,956,688 1,971,293 886,647 258,607 5,073,235 Depreciation, Depletion and Amortization 4 2023 $ 124,483 $ 104,722 $ 24,519 $ 87,264 $ 340,988 2022 111,599 91,944 24,854 80,427 308,824 2021 78,802 91,141 25,822 49,419 245,184 Capital Expenditures 2023 $ 186,109 $ 111,619 $ 24,838 $ 40,511 $ 363,077 2022 127,478 145,021 21,177 35,093 328,769 2021 60,532 150,225 22,780 22,482 256,019 1 Intersegment sales are recorded at a market-related transfer price. 2 Included in Corporate above are restructuring/asset impairment charges, changes in LIFO inventory reserves, net, gains or losses from derivatives, gains or losses from the divestiture of businesses and other assets, acquisition, integration and divestiture-related costs, amortization of acquired intangibles, and other non-operating income and expenses associated with the following segments: Consumer Packaging Industrial Paper All Other Corporate Total 2023 $ (56,237) $ 17,064 $ (24,486) $ (120,862) $ (184,521) 2022 (138,343) (40,805) (18,800) (150,635) (348,583) 2021 (25,983) (2,570) (23,312) (673,900) (725,765) The remaining amounts reported as Corporate consist of: interest expense; interest income; non-operating pension costs; and portions of acquisition, integration and divestiture-related costs, restructuring, other income, net, and other non-operating income and expenses not associated with a particular segment. 3 Identifiable assets are those assets used by each segment in its operations. Corporate assets consist primarily of cash and cash equivalents, investments in affiliates, headquarters facilities, deferred income taxes and prepaid expenses. 4 Depreciation and depletion incurred at Corporate are allocated to the reportable segments.
Sales to unaffiliated customers and long-lived assets by geographic region	Sales to unaffiliated customers and long-lived assets by geographic region are as follows: 2023 2022 2021 Sales to Unaffiliated Customers United States $ 4,818,736 $ 5,232,092 $ 3,650,090 Europe 921,347 961,697 941,655 Canada 216,690 227,668 212,272 Asia Pacific 335,557 373,734 401,003 Other 488,962 455,361 385,418 Total $ 6,781,292 $ 7,250,552 $ 5,590,438 Long-lived Assets United States $ 3,504,438 $ 3,240,011 $ 2,078,342 Europe 653,730 607,996 545,211 Canada 113,888 96,210 104,913 Asia Pacific 158,301 157,030 157,084 Other 196,504 85,233 68,949 Total $ 4,626,861 $ 4,186,480 $ 2,954,499

Accumulated other comprehensi_2

Accumulated other comprehensive loss (Tables)	12 Months Ended
	Dec. 31, 2023
Equity [Abstract]
Summary of Components of Accumulated Other Comprehensive Loss	The following table summarizes the components of accumulated other comprehensive loss and the changes in accumulated other comprehensive loss, net of tax as applicable, for the years ended December 31, 2023 and 2022: Foreign Currency Items Defined Benefit Pension Items Gains and Losses on Cash Flow Hedges Accumulated Other Comprehensive Loss Balance at December 31, 2021 $ (269,076) $ (91,397) $ 1,048 $ (359,425) Other comprehensive (loss)/income before reclassifications (72,987) (3,471) 3,244 (73,214) Amounts reclassified from accumulated other comprehensive loss to net income 3,747 3,895 (5,593) 2,049 Amounts reclassified from accumulated other comprehensive loss to fixed assets — — 507 507 Other comprehensive (loss)/income (69,240) 424 (1,842) (70,658) Balance at December 31, 2022 $ (338,316) $ (90,973) $ (794) $ (430,083) Other comprehensive income/(loss) before reclassifications 68,705 (16,305) 6,622 59,022 Amounts reclassified from accumulated other comprehensive loss to net income 2,033 7,651 (5,177) 4,507 Amounts reclassified from accumulated other comprehensive loss to fixed assets — — 292 292 Other comprehensive income/(loss) 70,738 (8,654) 1,737 63,821 Balance at December 31, 2023 $ (267,578) $ (99,627) $ 943 $ (366,262)
Summary of Effects on Net Income of Significant Amounts Reclassified from Accumulated Other Comprehensive Loss	The following table summarizes the amounts reclassified from accumulated other comprehensive loss and the affected line items in the consolidated statements of net income for the years ended December 31, 2023 and 2022: Amount Reclassified from Accumulated Other Comprehensive Loss Details about Accumulated Other Comprehensive Loss Components Year Ended December 31, 2023 Year Ended December 31, 2022 Affected Line Item in the Consolidated Statements of Net Income Foreign currency items Loss on Russia restructuring (see Note 4) $ — $ (3,747) Restructuring/Asset impairment charges Loss on RTS Packaging investment (see Note 3) (2,033) — Other income, net (2,033) (3,747) Net income/(loss) Defined benefit pension items (see Note 14) Pension-related loss upon purchase of remaining interest in RTS Packaging joint venture (4,756) — Other income, net Effect of settlement loss (1,010) (479) Non-operating pension cost Effect of curtailment loss — (43) Non-operating pension cost Amortization of defined benefit pension items (4,458) (6,472) Non-operating pension cost (10,224) (6,994) Income/(loss) before income taxes 2,573 3,099 Provision for/(Benefit from) income taxes (7,651) (3,895) Net income/(loss) Gains and losses on cash flow hedges (see Note 11) Foreign exchange contracts 10,860 3,460 Net Sales Foreign exchange contracts (3,728) (2,852) Cost of sales Commodity contracts (32) 6,948 Cost of sales 7,100 7,556 Income/(loss) before income taxes (1,923) (1,963) Provision for/(Benefit from) income taxes 5,177 5,593 Net income/(loss) Amounts reclassified to net income from accumulated other comprehensive loss $ (4,507) $ (2,049) Net income/(loss)
Summary of Before and After Tax Amounts for Comprehensive Income (Loss) Components	The following table summarizes the tax expense/(benefit) for the components of other comprehensive income/(loss): For the year ended December 31, 2023 For the year ended December 31, 2022 Before Tax Amount Tax After Tax Amount Before Tax Amount Tax After Tax Amount Foreign currency items: Other comprehensive income/(loss) before reclassifications $ 67,411 $ 1,294 $ 68,705 $ (72,987) $ — $ (72,987) Amounts reclassified from accumulated other comprehensive loss to net income 2,033 — 2,033 3,747 — 3,747 Net other comprehensive income/(loss) from foreign currency items 69,444 1,294 70,738 (69,240) — (69,240) Defined benefit pension items: Other comprehensive (loss)/ income before reclassifications (21,815) 5,510 (16,305) (3,365) (106) (3,471) Amounts reclassified from accumulated other comprehensive loss to net income 10,224 (2,573) 7,651 6,994 (3,099) 3,895 Net other comprehensive (loss)/income from defined benefit pension items (a) (11,591) 2,937 (8,654) 3,629 (3,205) 424 Cash flow hedges: Other comprehensive income/(loss) before reclassifications 9,081 (2,459) 6,622 4,312 (1,068) 3,244 Amounts reclassified from accumulated other comprehensive loss to net income (7,100) 1,923 (5,177) (7,556) 1,963 (5,593) Amounts reclassified from accumulated other comprehensive loss to fixed assets 401 (109) 292 805 (298) 507 Net other comprehensive (loss)/income from cash flow hedges 2,382 (645) 1,737 (2,439) 597 (1,842) Other comprehensive income/(loss) $ 60,235 $ 3,586 $ 63,821 $ (68,050) $ (2,608) $ (70,658) (a)

Summary of significant accoun_4

Summary of significant accounting policies - Company Held Significant Investment (Details)	Dec. 31, 2023
Cascades Conversion, Inc.
Noncontrolling Interest [Line Items]
Ownership percentage by joint venture	50%
Cascades Sonoco, Inc.
Noncontrolling Interest [Line Items]
Ownership percentage by joint venture	50%
ISI Robotics, LLC
Noncontrolling Interest [Line Items]
Ownership percentage by joint venture	20%
Showa Products Company Ltd.
Noncontrolling Interest [Line Items]
Ownership percentage by joint venture	22.20%
Papertech Energía, S.L.
Noncontrolling Interest [Line Items]
Ownership percentage by joint venture	25%
Weidenhammer New Packaging, LLC
Noncontrolling Interest [Line Items]
Ownership percentage by joint venture	40%

Summary of significant accoun_5

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%	11%
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%
Interest held in acquiree before subsequent acquisition (percent)				35%
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%	13%
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%

Acquisitions and divestitures -

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%
Ball Corporation
Business Acquisition [Line Items]
Joint venture, ownership (percent)							49%
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%
Interest held in acquiree before subsequent acquisition (percent)		35%
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

Acquisitions and Divestitures_2

Acquisitions and Divestitures - Summary of the Purchase Consideration Transferred for the Acquisitions (Details) - USD ($) $ in Thousands		12 Months Ended
	Sep. 08, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Cash consideration, net of cash acquired		$ 372,616	$ 1,427,020	$ 22,209
RTS Packaging and Chattanooga Mill
Business Acquisition [Line Items]
Cash consideration, net of cash acquired	$ 313,388
Final working capital settlement	452
Settlement of preexisting relationships	(1,235)
Purchase consideration transferred	$ 374,547

Acquisitions and Divestitures_3

Acquisitions and Divestitures - Schedule of Preliminary Fair Value Of Assets Acquired And Measurement Period Adjustments (Details) - USD ($) $ in Thousands	4 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Sep. 08, 2023	Nov. 15, 2022	Aug. 31, 2022
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Goodwill	$ 1,810,654	$ 1,810,654	$ 1,675,311
Measurement Period Adjustments
Goodwill		15,083
RTS Packaging and Chattanooga Mill
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Trade accounts receivable	17,488	17,488		$ 17,488
Other receivables	0	0		0
Inventories	19,262	19,262		20,209
Prepaid expenses	2,131	2,131		2,720
Property, plant and equipment	74,236	74,236		73,483
Right of use asset - operating leases	34,894	34,894		34,604
Other intangible assets	190,565	190,565		199,560
Goodwill	107,566	107,566		92,657
Other assets	2,053	2,053		2,465
Payable to suppliers	(7,320)	(7,320)		(7,320)
Accrued expenses and other	(12,461)	(12,461)		(12,436)
Accrued wages and other compensation	2,731	2,731		2,731
Notes payable and current portion of long-term debt	(24)	(24)		(24)
Noncurrent operating lease liabilities	(29,905)	(29,905)		(29,905)
Pension and other postretirement benefits	11,529	11,529		10,761
Long-term debt	(1,942)	(1,942)		(1,942)
Deferred income taxes	(5,921)	(5,921)		(3,419)
Other long-term liabilities	(1,815)	(1,815)		(3,293)
Net assets acquired	374,547	374,547		$ 371,355
Measurement Period Adjustments
Inventories	(947)
Prepaid expenses	(589)
Property, plant and equipment	753
Right of use asset - operating leases	290
Other intangible assets	(8,995)
Goodwill	14,909
Other assets	(412)
Pension and other postretirement benefits	768
Accrued expenses and other	(25)
Deferred income taxes	(2,502)
Other long-term liabilities	1,478
Net assets acquired	3,192
Inapel
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Trade accounts receivable	30,301	30,301
Other receivables	6,088	6,088
Inventories	9,269	9,269
Prepaid expenses	1,430	1,430
Property, plant and equipment	11,456	11,456
Right of use asset - operating leases	217	217
Other intangible assets	8,653	8,653
Goodwill	15,704	15,704
Other assets	793	793
Payable to suppliers	(15,899)	(15,899)
Accrued expenses and other	(4,606)	(4,606)
Accrued wages and other compensation	1,127	1,127
Notes payable and current portion of long-term debt	0	0
Noncurrent operating lease liabilities	(117)	(117)
Deferred income taxes	(2,934)	(2,934)
Net assets acquired	$ 59,228	59,228
Metalpack Packaging
Measurement Period Adjustments
Other receivables		0
Inventories		(73)	$ 33,155
Property, plant and equipment		(247)
Goodwill		439
Accrued expenses and other		(119)
Net assets acquired		0
Skjern
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Property, plant and equipment					$ 40,489
Other intangible assets					39,330
Goodwill					$ 32,194
Measurement Period Adjustments
Other receivables		0
Inventories		14
Property, plant and equipment		4,921
Other intangible assets		(3,488)
Goodwill		3,135
Accrued expenses and other		(203)
Taxes Payable		(3,416)
Net assets acquired		963
Nordeste
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Net [Abstract]
Property, plant and equipment						$ 1,374
Other intangible assets						3,031
Goodwill						$ 2,014
Measurement Period Adjustments
Other receivables		(186)
Inventories		(38)
Property, plant and equipment		494
Other intangible assets		3,031
Goodwill		(3,400)
Accrued expenses and other		0
Taxes Payable		0
Net assets acquired		$ (99)

Acquisitions and Divestitures_4

Acquisitions and Divestitures - Pro Forma and Supplemental Information (Details) - USD ($) $ in Thousands	11 Months Ended	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net sales		$ 7,300,140	$ 6,425,771
Net Income (Loss)		$ 528,818	$ (145,570)
Metalpack Packaging
Business Acquisition, Pro Forma Information, Nonrecurring Adjustment [Line Items]
Net sales	$ 1,035,020
Net Income (Loss)	$ 62,777

Acquisitions and divestitures_5

Acquisitions and divestitures - Divestitures - Additional Information (Details) a in Thousands						3 Months Ended		12 Months Ended
	Jul. 01, 2023 USD ($)	Mar. 29, 2023 USD ($) a	Jan. 26, 2023 USD ($)	Sep. 30, 2021 USD ($)	Apr. 05, 2021 USD ($)	Apr. 02, 2023 USD ($)	Apr. 04, 2021 USD ($) employee facility	Dec. 31, 2023 USD ($)	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jun. 30, 2024 USD ($)
Business Acquisition [Line Items]
Goodwill, impairment loss								$ 0
Gain/(Loss) on divestiture of business and other assets								78,929,000	$ 0	$ (2,667,000)
Gain/(Loss) on divestiture of businesses								$ 57,104,000	0	$ (2,667,000)
Disposal Group, Not Discontinued Operation, Gain (Loss) on Disposal, Statement of Income or Comprehensive Income [Extensible Enumeration]								Gain/(Loss) on divestiture of business and other assets
Metalpack Packaging
Business Acquisition [Line Items]
Inventories								$ (73,000)	33,155,000
Metalpack Packaging | Cost of sales
Business Acquisition [Line Items]
Inventories								5,227,000	$ 33,155,000
Dispositions | US BulkSak Business
Business Acquisition [Line Items]
Consideration for disposal of business held for sale	$ 1,096,000							20,271,000
Proceeds from Divestiture of Businesses	18,271,000
Restricted cash								2,000,000
Write off of assets as part of the sale totaling								13,437,000
Goodwill, impairment loss								3,333,000
Gain/(Loss) on divestiture of business and other assets	$ 85,000							$ 6,834,000
Dispositions | US BulkSak Business | Maximum
Business Acquisition [Line Items]
Funds held in escrow, term								18 months
Dispositions | Sonoco Sustainability Solutions
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses			$ 13,839,000
Restricted cash			$ 1,500,000
Funds held in escrow, term			20 months
Write off of assets as part of the sale totaling						$ 4,274,000
Goodwill, impairment loss						3,042,000
Gain/(Loss) on divestiture of business and other assets						$ 11,065,000
Consideration from disposal, equity interest, value received			$ 5,000,000
Consideration from disposal, equity interest percentage received			2.70%
Dispositions | Sonoco Sustainability Solutions | Forecast
Business Acquisition [Line Items]
Consideration from disposal, equity interest, value received											$ 3,200,000
Dispositions | Display And Packaging Reporting Unit
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses					$ 81,675,000
Write off of assets as part of the sale totaling					$ 84,434,000
Approximate number of employees (employee) | employee							450
Number of manufacturing and fulfillment facilities | facility							8
Number of sales and design centers | facility							4
Gain/(Loss) on divestiture of businesses							$ (2,759,000)
Dispositions | Wilson Thermoforming
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses				$ 3,528,000
Gain/(Loss) on divestiture of businesses				$ 92,000
Dispositions | Timberland Properties
Business Acquisition [Line Items]
Proceeds from Divestiture of Businesses		$ 70,802,000
Area of land | a		55,000
Disposed assets net book value								$ 9,857,000
Gain (loss) on the sale of business								$ 60,945,000

Acquisitions and Divestitures_6

Acquisitions and Divestitures - Acquisition, Integration, and Divestiture-Related Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Business Acquisition [Line Items]
Acquisition, integration, and divestiture-related costs	$ 26,254	$ 70,210	$ 17,722
Metalpack Packaging
Business Acquisition [Line Items]
Inventories	$ (73)	$ 33,155

Restructuring and asset impai_3

Restructuring and asset impairment - Total Restructuring and Asset Impairment Charges Net (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	$ 56,933	$ 46,815	$ 9,176
Other asset impairments	0	10,095	5,034
Restructuring/Asset impairment charges	56,933	56,910	14,210
Consumer Packaging
Restructuring Cost and Reserve [Line Items]
Other asset impairments		930
Operating segments | Consumer Packaging
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	8,059	12,433	3,427
Operating segments | Industrial Paper Packaging
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	38,754	16,019	(1,642)
All Other
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	7,623	(166)	2,969
Other asset impairments		9,165
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	2,497	18,529	4,422
Severance and Termination Benefits
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	26,631	17,983	13,097
Asset Impairment/Disposal of Assets
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	19,603	9,442	(9,116)
Other Costs
Restructuring Cost and Reserve [Line Items]
Restructuring and restructuring-related asset impairment charges	$ 10,699	$ 19,390	$ 5,195

Restructuring and asset impai_4

Restructuring and asset impairment - Restructuring Accrual Activity for Given Years (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Restructuring Reserve [Roll Forward]
Liability, beginning balance	$ 16,069	$ 12,790
2022 charges	56,933	46,815
Cash (payments)/receipts	(30,680)	(26,722)
Asset write downs/disposals	(26,445)	(16,580)
Foreign currency translation	76	(234)
Liability, ending balance	15,953	16,069
Severance and Termination Benefits
Restructuring Reserve [Roll Forward]
Liability, beginning balance	14,677	10,917
2022 charges	26,631	17,983
Cash (payments)/receipts	(27,000)	(14,024)
Asset write downs/disposals	0	0
Foreign currency translation	7	(199)
Liability, ending balance	14,315	14,677
Asset Impairment/Disposal of Assets
Restructuring Reserve [Roll Forward]
Liability, beginning balance	0	0
2022 charges	19,603	9,442
Cash (payments)/receipts	6,842	7,138
Asset write downs/disposals	(26,445)	(16,580)
Foreign currency translation	0	0
Liability, ending balance	0	0
Other Costs
Restructuring Reserve [Roll Forward]
Liability, beginning balance	1,392	1,873
2022 charges	10,699	19,390
Cash (payments)/receipts	(10,522)	(19,836)
Asset write downs/disposals	0	0
Foreign currency translation	69	(35)
Liability, ending balance	$ 1,638	$ 1,392

Restructuring and asset impai_5

Restructuring and asset impairment - Additional Information (Details) $ in Thousands		12 Months Ended
	Jul. 01, 2022 USD ($)	Dec. 31, 2023 USD ($) employee	Dec. 31, 2022 USD ($) manufacturing_plant position	Dec. 31, 2021 USD ($)
Disposal Group, Including Discontinued Operations [Line Items]
Asset impairment loss/(gain)		$ 26,445	$ 21,444	$ (4,082)
Future additional charges expected to be recognized		2,300
Other asset impairments		$ 0	10,095	$ 5,034
Impact of new accounting pronouncements
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments	$ 3,747
All Other
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments			$ 9,165
Industrial Paper Packaging
Disposal Group, Including Discontinued Operations [Line Items]
Number of small tube and core plants | manufacturing_plant			2
Consumer Packaging
Disposal Group, Including Discontinued Operations [Line Items]
Other asset impairments			$ 930
Organizational Effectiveness Efforts
Disposal Group, Including Discontinued Operations [Line Items]
Elimination of positions due to realignment of cost structure (position)		300	180
Asset impairment loss/(gain)			$ 3,620

Book cash overdrafts and cash_2

Book cash overdrafts and cash pooling (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 151,937	$ 227,438
Outstanding A/P check
Cash and Cash Equivalents [Line Items]
Outstanding A/P checks	24,638	17,986
Outstanding payroll checks
Cash and Cash Equivalents [Line Items]
Outstanding A/P checks	0	244
Notional Pooling Arrangement
Cash and Cash Equivalents [Line Items]
Cash and cash equivalents	$ 1,308	$ 2,375

Property, plant and equipment -

Property, plant and equipment - Summary of Property, Plant and Equipment (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Property, Plant and Equipment [Abstract]
Land	$ 135,518	$ 131,362
Timber resources	0	42,202
Buildings	740,138	664,012
Machinery and equipment	3,825,134	3,528,545
Construction in progress	269,061	226,701
Property, plant and equipment, gross	4,969,851	4,592,822
Accumulated depreciation and depletion	(3,063,714)	(2,882,423)
Property, plant and equipment, net	$ 1,906,137	$ 1,710,399

Property, plant and equipment_2

Property, plant and equipment - Additional Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Property, Plant and Equipment [Abstract]
Depreciation and depletion expense	$ 240,614	$ 216,138	$ 189,667

Leases - Additional Information

Leases - Additional Information (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($) renewal_option	Sep. 08, 2023 USD ($)	Dec. 31, 2022 USD ($)	Jan. 26, 2022 USD ($)	Dec. 31, 2021
Lessee, Lease, Description [Line Items]
Number of renewal options | renewal_option	1
Lease liability	$ 320,257
Weighted average remaining lease term - Operating leases	10 years 8 months 12 days		11 years 2 months 12 days		11 years 9 months 18 days
Weighted average discount rate - Operating leases (percent)	4.97%		4.27%		4.09%
Finance lease obligations	$ 88,994		$ 102,920
Weighted average remaining lease term - Finance leases	8 years 9 months 18 days		9 years 2 months 12 days		13 years 6 months
Weighted average discount rate - Finance leases (percent)	4.89%		4.79%		2.86%
RTS Packaging and Chattanooga Mill
Lessee, Lease, Description [Line Items]
Lease liability		$ 34,604
Weighted average remaining lease term - Operating leases		11 years 6 months
Weighted average discount rate - Operating leases (percent)		6.40%
Metalpack Packaging
Lessee, Lease, Description [Line Items]
Lease liability				$ 33,910
Weighted average remaining lease term - Operating leases				11 years
Weighted average discount rate - Operating leases (percent)				2.80%
Finance lease obligations				$ 46,687
Weighted average remaining lease term - Finance leases				3 years 9 months 18 days
Weighted average discount rate - Finance leases (percent)				7.50%
Minimum
Lessee, Lease, Description [Line Items]
Lease renewal term	1 year
Maximum
Lessee, Lease, Description [Line Items]
Lease renewal term	5 years

Leases - Balance sheet location

Leases - Balance sheet locations and values of the Company's lease assets and lease liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Leases [Abstract]
Operating lease assets	$ 314,944	$ 296,781
Finance lease assets	94,026	103,467
Total lease assets	408,970	400,248
Current operating lease liabilities	54,803	52,306
Current finance lease liabilities	18,791	19,015
Total current lease liabilities	73,594	71,321
Noncurrent operating lease liabilities	265,454	250,994
Noncurrent finance lease liabilities	70,203	83,905
Total noncurrent lease liabilities	335,657	334,899
Total lease liabilities	$ 409,251	$ 406,220
Finance Lease, Right-of-Use Asset, Statement of Financial Position [Extensible List]	Other Assets	Other Assets
Operating Lease, Liability, Current, Statement of Financial Position [Extensible List]	Accrued expenses and other	Accrued expenses and other
Finance Lease, Liability, Current, Statement of Financial Position [Extensible List]	Notes payable and current portion of long-term debt	Notes payable and current portion of long-term debt
Finance Lease, Liability, Noncurrent, Statement of Financial Position [Extensible List]	Long-term Debt	Long-term Debt

Leases - Components of the Comp

Leases - Components of the Company's total lease cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Operating lease cost	$ 54,990	$ 51,890	$ 48,158
Amortization of lease asset	13,110	12,241	5,747
Interest on lease liabilities	4,447	4,751	1,384
Variable lease cost	40,983	30,269	26,198
Impairment charges	0	293	148
Total lease cost	$ 113,530	$ 99,444	$ 81,635

Leases - Five-year maturity sch

Leases - Five-year maturity schedule of Company's lease liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Operating Leases
2024	$ 55,688
2025	48,400
2026	38,379
2027	34,125
2028	31,329
Beyond 2028	198,533
Total lease payments	406,454
Less: Interest	86,197
Operating lease liability	320,257
Finance Leases
2024	19,163
2025	21,186
2026	16,727
2027	4,791
2028	4,277
Beyond 2028	38,922
Total lease payments	105,066
Less: Interest	16,072
Finance lease obligations	88,994	$ 102,920
Total
2024	74,851
2025	69,586
2026	55,106
2027	38,916
2028	35,606
Beyond 2028	237,455
Total lease payments	511,520
Less: Interest	102,269
Lease Liabilities	$ 409,251

Leases - Company's weighted ave

Leases - Company's weighted average remaining lease term and discount rates used (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Leases [Abstract]
Weighted average remaining lease term - Operating leases	10 years 8 months 12 days	11 years 2 months 12 days	11 years 9 months 18 days
Weighted average remaining lease term - Finance leases	8 years 9 months 18 days	9 years 2 months 12 days	13 years 6 months
Weighted average discount rate - Operating leases (percent)	4.97%	4.27%	4.09%
Weighted average discount rate - Finance leases (percent)	4.89%	4.79%	2.86%
Operating cash flows used by operating leases	$ 54,877	$ 52,198	$ 50,479
Operating cash flows used by finance leases	4,447	4,751	1,384
Financing cash flows used by finance leases	15,559	12,687	4,699
Leased assets obtained in exchange for new operating lease liabilities	33,059	36,158	20,505
Leased assets obtained in exchange for new finance lease liabilities	8,354	10,091	14,643
Modification to leased assets for increase in operating lease liabilities	2,938	2,807	15,936
Modification to leased assets for increase/(decrease) in finance lease liabilities	18	(642)	9,586
Termination reclasses to decrease operating lease assets	(15,314)	(4,285)	(5,267)
Termination reclasses to decrease operating lease liabilities	(16,169)	(4,537)	(5,602)
Termination reclasses to decrease finance lease assets	(4,564)	(1,351)	(125)
Termination reclasses to decrease finance lease liabilities	$ (6,462)	$ (87)	$ (130)

Goodwill and other intangible_3

Goodwill and other intangible assets - Changes in Goodwill by Segment (Details) $ in Thousands	12 Months Ended
	Dec. 31, 2023 USD ($)
Goodwill [Roll Forward]
Balance as of January 1, 2023	$ 1,675,311
Acquisitions	108,361
Divestitures	(6,375)
Measurement period adjustments	15,083
Foreign currency translation	18,274
Balance as of December 31, 2023	1,810,654
All Other
Goodwill [Roll Forward]
Balance as of January 1, 2023	381,860
Acquisitions	0
Divestitures	0
Measurement period adjustments	0
Foreign currency translation	1,951
Balance as of December 31, 2023	383,811
Consumer Packaging | Operating segments
Goodwill [Roll Forward]
Balance as of January 1, 2023	898,625
Acquisitions	15,704
Divestitures	0
Measurement period adjustments	439
Foreign currency translation	5,669
Balance as of December 31, 2023	920,437
Industrial Paper Packaging | Operating segments
Goodwill [Roll Forward]
Balance as of January 1, 2023	394,826
Acquisitions	92,657
Divestitures	(6,375)
Measurement period adjustments	14,644
Foreign currency translation	10,654
Balance as of December 31, 2023	$ 506,406

Goodwill and other intangible_4

Goodwill and other intangible assets - Additional Information (Details) - USD ($)		12 Months Ended
	Sep. 08, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Oct. 01, 2023
Goodwill [Line Items]
Goodwill, impairment loss		$ 0
Goodwill		1,810,654,000	$ 1,675,311,000
Aggregate amortization expenses		87,264,000	$ 80,445,000	$ 49,419,000
Amortization expense on other intangible assets in 2024		88,200,000
Amortization expense on other intangible assets in 2025		79,200,000
Amortization expense on other intangible assets in 2026		75,300,000
Amortization expense on other intangible assets in 2027		73,900,000
Amortization expense on other intangible assets in 2028		73,100,000
Inapel, RTS Packaging and Chattanooga Mill
Goodwill [Line Items]
Other intangible assets	$ 199,217,000
Weighted average useful life	14 years 9 months 18 days
RTS Packaging and Chattanooga Mill
Goodwill [Line Items]
Goodwill	$ 92,657,000	107,566,000
Other intangible assets	$ 199,560,000	190,565,000
Inapel
Goodwill [Line Items]
Goodwill		15,704,000
Other intangible assets		8,653,000
Plastics - Medical reporting unit
Goodwill [Line Items]
Excess of fair value of reporting unit over carrying value (percent)					29.90%
Goodwill		$ 64,212,000
Discount Rate | Plastics - Medical reporting unit
Goodwill [Line Items]
Discount rate (percent)					12%
Change necessary in order for estimated fair value to fall below carrying value (percent)		14.50%

Goodwill and other intangible_5

Goodwill and other intangible assets - Summary of Other Intangible Assets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Other Intangible Assets, Gross:
Other Intangible Assets, Gross	$ 1,417,602	$ 1,220,196
Accumulated Amortization	(563,932)	(478,598)
Other Intangible Assets, Net	853,670	741,598
Patents
Other Intangible Assets, Gross:
Other Intangible Assets, Gross	29,304	29,303
Accumulated Amortization	(19,549)	(17,889)
Customer lists
Other Intangible Assets, Gross:
Other Intangible Assets, Gross	1,282,689	1,092,232
Accumulated Amortization	(493,778)	(417,034)
Trade names
Other Intangible Assets, Gross:
Other Intangible Assets, Gross	41,836	34,220
Accumulated Amortization	(18,845)	(15,892)
Proprietary technology
Other Intangible Assets, Gross:
Other Intangible Assets, Gross	56,857	57,720
Accumulated Amortization	(29,013)	(25,113)
Other
Other Intangible Assets, Gross:
Other Intangible Assets, Gross	6,916	6,721
Accumulated Amortization	$ (2,747)	$ (2,670)

Supply Chain Financing (Details

Supply Chain Financing (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Investments, Debt and Equity Securities [Abstract]
Accounts payable for supply chain financing	$ 35,847	$ 52,415
Notes payable and current portion of long-term debt	$ 0	$ 63,448

Debt - Schedule of Debt (Detail

Debt - Schedule of Debt (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
Finance lease obligations	$ 88,994	$ 102,920
Total debt	3,083,000	3,222,223
Less: Notes payable and current portion of long-term debt	47,132	502,440
Long-term Debt	3,035,868	2,719,783
Syndicated term loan due December 2023
Debt Instrument [Line Items]
Debt	0	399,246
Syndicated term loan due January 2025
Debt Instrument [Line Items]
Debt	0	299,644
Syndicated term loan due August 2028
Debt Instrument [Line Items]
Debt	$ 572,025	0
1.80% notes due February 2025
Debt Instrument [Line Items]
Stated interest rate (percent)	1.80%
Debt	$ 399,149	398,369
2.25% notes due February 2027
Debt Instrument [Line Items]
Stated interest rate (percent)	2.25%
Debt	$ 298,421	297,910
2.85% notes due February 2032
Debt Instrument [Line Items]
Stated interest rate (percent)	2.85%
Debt	$ 495,785	495,264
3.125% notes due May 2030
Debt Instrument [Line Items]
Stated interest rate (percent)	3.125%
Debt	$ 596,480	595,911
5.75% notes due November 2040
Debt Instrument [Line Items]
Stated interest rate (percent)	5.75%
Debt	$ 536,246	$ 536,214
Other foreign denominated debt, average rate of 10.4% in 2023 and 5.7% in 2022
Debt Instrument [Line Items]
Weighted average interest rate (percent)	10.40%	5.70%
Debt	$ 78,800	$ 20,668
Other debt
Debt Instrument [Line Items]
Debt	$ 17,100	$ 76,077

Debt - Additional Information (

Debt - Additional Information (Details) - USD ($)						12 Months Ended
	Sep. 08, 2023	Aug. 07, 2023	Jun. 30, 2021	May 25, 2021	May 13, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Apr. 28, 2021
Line of Credit Facility [Line Items]
Loss from the early extinguishment of debt						$ 0	$ 0	$ (20,184,000)
Less: Notes payable and current portion of long-term debt						47,132,000	502,440,000
Cash and cash equivalents						151,937,000	227,438,000
Committed availability under credit facilities						238,400,000
Reverse Treasury Lock Contract
Line of Credit Facility [Line Items]
Net purchase/(sell) position of derivatives									$ 100,000,000
Loss on derivative, net					$ 1,356,000
Syndicated term loan due August 2028
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 900,000,000
Proceeds from lines of credit	$ 270,000,000	$ 600,000,000
Repayments of credit facility						295,000,000
Debt						572,025,000	$ 0
Syndicated term loan due August 2028 | SOFR
Line of Credit Facility [Line Items]
Basis points, adjustment (percent)		0.10%
Basis points (percent)		1.90%
5.75% debentures due November 2040
Line of Credit Facility [Line Items]
Amount offered to be repurchased									300,000,000
Debt									$ 600,000,000
Stated interest rate (percent)									5.75%
Portion of outstanding debt repurchased (percent)				10.53%
Cash cost of debt repurchased				$ 81,961,000
Non-cash write-offs, net					73,000
Loss from the early extinguishment of debt					$ 20,184,000
Revolving Credit Facility
Line of Credit Facility [Line Items]
Maximum borrowing capacity		$ 900,000,000	$ 750,000,000			$ 900,000,000
Debt term			5 years
Line of credit facility, Increase in commitment		$ 150,000,000
Revolving Credit Facility | LIBOR
Line of Credit Facility [Line Items]
Basis points (percent)			1.25%
Commercial paper, average rate of 1.93% in 2022 and 0.16% in 2021
Line of Credit Facility [Line Items]
Maximum borrowing capacity			$ 500,000,000

Debt - Schedule of Debt Repurch

Debt - Schedule of Debt Repurchased (Details) - USD ($) $ in Thousands		12 Months Ended
	May 25, 2021	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Apr. 28, 2021
Line of Credit Facility [Line Items]
Premium and Other Amounts Paid		$ 0	$ 0	$ 20,111
5.75% debentures due November 2040
Line of Credit Facility [Line Items]
Stated interest rate (percent)					5.75%
Principal Amount Tendered	$ 63,206
Premium and Other Amounts Paid	18,755
Total Cash Paid	$ 81,961

Debt - Maturities (Details)

Debt - Maturities (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Debt Disclosure [Abstract]
2024	$ 47,132
2025	449,774
2026	21,778
2027	310,355
2028	$ 583,655

Financial instruments and der_3

Financial instruments and derivatives - Carrying Amounts and Fair Values of Financial Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Carrying Amount
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Long-term debt, net of current portion	$ 3,035,868	$ 2,719,783
Fair Value
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Long-term debt, net of current portion	$ 2,890,009	$ 2,477,884

Financial instruments and der_4

Financial instruments and derivatives - Additional Information (Details) MMBTU in Millions, BTU in Millions	12 Months Ended
	Dec. 31, 2023 USD ($) BTU MMBTU t	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Jan. 21, 2022	Dec. 29, 2021 USD ($) bank
Derivative [Line Items]
Derivatives net of tax	$ 63,391,000	$ (70,198,000)	$ 396,833,000
Derivative instrument, number of counter-parties | bank					2
Gain (loss) on settlement		5,201,000
Anticipated usage percentage covered by a swap contract for the current fiscal year (percent)	$ (6,790,000)	(8,692,000)
Unsecured Debt
Derivative [Line Items]
Debt					$ 150,000,000,000
2.85% notes due February 2032
Derivative [Line Items]
Stated interest rate (percent)	2.85%
Debt	$ 495,785,000	495,264,000
2.85% notes due February 2032 | Unsecured Debt
Derivative [Line Items]
Stated interest rate (percent)				2.85%
Debt Instrument, Face Amount					$ 500,000,000
Cash Flow Hedges | Hedge derivatives, net:
Derivative [Line Items]
Price risk cash flow hedge derivative, at fair value, net	(41,000)	(172,000)
Commodity gain (loss) expected to be reclassified to the income statement during the next 12 months	(41,000)
Fair value of foreign currency cash flow hedges	1,502,000	(299,000)
Foreign currency gain (loss) expected to be reclassified to the income statement during the next 12 months	$ 1,502,000
Natural gas swaps | Non-hedge derivatives, net:
Derivative [Line Items]
Approximate amount of commodity covered by swap contracts outstanding (btu) | MMBTU	5.4
Anticipated usage percentage covered by a swap contract for the next fiscal year (percent)	0.75
Natural gas swaps | Cash Flow Hedges | Hedge derivatives, net:
Derivative [Line Items]
Approximate amount of commodity covered by swap contracts outstanding (btu) | BTU	0.1
Anticipated usage percentage covered by a swap contract for the next fiscal year (percent)	0.01
Aluminum Swaps | Cash Flow Hedges | Hedge derivatives, net:
Derivative [Line Items]
Anticipated usage percentage covered by a swap contract for the next fiscal year (percent)	0.10
Approximate amount of commodity covered by swap contracts outstanding (tonne) | t	488
Forward Contracts | Cash Flow Hedges | Hedge derivatives, net:
Derivative [Line Items]
Fair value of foreign currency cash flow hedges	$ 0	$ (564,000)
Foreign currency gain (loss) expected to be reclassified to the income statement during the next 12 months	0
Foreign currency gain (loss) reclassified to the income statement	(401,000)
Currency Swap | Net investment hedge
Derivative [Line Items]
Net purchase/(sell) position of derivatives	500,000,000
Gain (loss) on derivative used in net investment hedge, after tax	(5,073,000)
Derivatives net of tax	(3,779,000)
Net investment hedges, tax	$ 1,294,000

Financial instruments and der_5

Financial instruments and derivatives - Net Positions of Foreign Contracts (Details) - Dec. 31, 2023 - Cash Flow Hedges - Hedge derivatives, net: - Purchase ₺ in Thousands, € in Thousands, £ in Thousands, zł in Thousands, kr in Thousands, kr in Thousands, R$ in Thousands, Kč in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	COP ($)	MXN ($)	PLN (zł)	DKK (kr)	SEK (kr)	CZK (Kč)	EUR (€)	TRY (₺)	BRL (R$)	GBP (£)	CAD ($)
Derivative [Line Items]
Net purchase position of derivatives	$ 22,276,464	$ 579,207	zł 131,417	kr 48,225		Kč 109,362	€ 2,291	₺ 57,507	R$ 54302		$ 35,016
Net sell position of derivatives					kr (6,827)					£ (435)

Financial Instruments and Der_6

Financial Instruments and Derivatives - Net Positions of Foreign Contracts Non-Designated Derivatives (Details) - Dec. 31, 2023 - Purchase - Non-hedge derivatives, net: ₺ in Thousands, Rp in Thousands, $ in Thousands, $ in Thousands, $ in Thousands, $ in Thousands	USD ($)	COP ($)	MXN ($)	TRY (₺)	CAD ($)	IDR (Rp)
Derivative [Line Items]
Net purchase position of derivatives		$ 59,655,780	$ 403,952	₺ 5,593	$ 5,923	Rp 7,711,880
Net sell position of derivatives	$ (10,459)

Financial instruments and der_7

Financial instruments and derivatives - Location and Fair Values of Derivative Instruments (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Hedge derivatives, net: | Commodity Contracts | Prepaid expenses
Derivatives, Fair Value [Line Items]
Derivatives assets	$ 67	$ 10
Hedge derivatives, net: | Commodity Contracts | Other assets
Derivatives, Fair Value [Line Items]
Derivatives assets	0	8
Hedge derivatives, net: | Commodity Contracts | Accrued expenses and other
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(108)	(155)
Hedge derivatives, net: | Commodity Contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Derivatives liabilities	0	(35)
Hedge derivatives, net: | Foreign Exchange Contracts | Prepaid expenses
Derivatives, Fair Value [Line Items]
Derivatives assets	2,525	1,251
Hedge derivatives, net: | Foreign Exchange Contracts | Accrued expenses and other
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(1,024)	(2,114)
Hedge derivatives, net: | Net investment hedge | Prepaid expenses
Derivatives, Fair Value [Line Items]
Derivatives assets	5,567	0
Hedge derivatives, net: | Net investment hedge | Other liabilities
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(10,640)	0
Non-hedge derivatives, net: | Commodity Contracts | Prepaid expenses
Derivatives, Fair Value [Line Items]
Derivatives assets	12	5
Non-hedge derivatives, net: | Commodity Contracts | Other assets
Derivatives, Fair Value [Line Items]
Derivatives assets	0	251
Non-hedge derivatives, net: | Commodity Contracts | Accrued expenses and other
Derivatives, Fair Value [Line Items]
Derivatives liabilities	(6,782)	(8,599)
Non-hedge derivatives, net: | Commodity Contracts | Other liabilities
Derivatives, Fair Value [Line Items]
Derivatives liabilities	0	(295)
Non-hedge derivatives, net: | Foreign Exchange Contracts | Prepaid expenses
Derivatives, Fair Value [Line Items]
Derivatives assets	130	115
Non-hedge derivatives, net: | Foreign Exchange Contracts | Accrued expenses and other
Derivatives, Fair Value [Line Items]
Derivatives liabilities	$ (159)	$ (169)

Financial instruments and der_8

Financial instruments and derivatives - Effect of Derivative Instruments on Financial Performance (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Derivative Instruments, Gain (Loss) [Line Items]
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]	Cost of sales, Selling, General and Administrative Expense	Cost of sales, Selling, General and Administrative Expense
Foreign Exchange Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivatives	$ 8,982	$ (1,009)
Foreign Exchange Contracts | Non-hedge derivatives, net:
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized	7,560	355
Foreign Exchange Contracts | Sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI Into Income	10,860	3,460
Foreign Exchange Contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI Into Income	(3,728)	(2,852)
Commodity Contracts
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Recognized in OCI on Derivatives	99	5,321
Commodity Contracts | Non-hedge derivatives, net:
Derivative Instruments, Gain (Loss) [Line Items]
Gain or (Loss) Recognized	(19,087)	1,831
Commodity Contracts | Cost of sales
Derivative Instruments, Gain (Loss) [Line Items]
Amount of Gain or (Loss) Reclassified from Accumulated OCI Into Income	$ (32)	$ 6,948

Financial instruments and der_9

Financial instruments and derivatives - Reclassification of Gains and Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net Sales	$ 6,781,292	$ 7,250,552	$ 5,590,438
Cost of sales	(5,345,638)	(5,810,903)	$ (4,528,528)
Reclassification out of Accumulated Other Comprehensive Income | Gains and Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net Sales	10,860	3,460
Cost of sales	(3,760)	4,096
Foreign Exchange Contracts | Reclassification out of Accumulated Other Comprehensive Income | Gains and Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net Sales	10,860	3,460
Cost of sales	(3,728)	(2,852)
Commodity Contracts | Reclassification out of Accumulated Other Comprehensive Income | Gains and Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income on Derivatives [Line Items]
Net Sales	0	0
Cost of sales	$ (32)	$ 6,948

Fair value measurements - Asset

Fair value measurements - Assets and Liabilities Measured on Recurring Basis (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	$ 308,800	$ 265,875
Common Collective
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	12,958	6,497
Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	45,931	50,467
Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	242,702	198,628
Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	4,175	1,099
Real estate funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	400	680
Cash and accrued income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	2,634	8,504
Assets measured at NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	77,207	40,104
Assets measured at NAV | Common Collective
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	12,958	6,497
Assets measured at NAV | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Assets measured at NAV | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	63,849	32,927
Assets measured at NAV | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Assets measured at NAV | Real estate funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	400	680
Assets measured at NAV | Cash and accrued income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	2,634	8,504
Level 1 | Common Collective
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 1 | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 1 | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 1 | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 1 | Real estate funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 1 | Cash and accrued income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	2,634	8,504
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	228,959	217,267
Level 2 | Common Collective
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 2 | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	45,931	50,467
Level 2 | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	178,853	165,701
Level 2 | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	4,175	1,099
Level 2 | Real estate funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 2 | Cash and accrued income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 3 | Common Collective
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 3 | Mutual funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 3 | Fixed income securities
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 3 | Short-term investments
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 3 | Real estate funds
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Level 3 | Cash and accrued income
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Total postretirement benefit plan assets	0	0
Fair Value, Recurring | Hedge derivatives, net: | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(5,073)
Fair Value, Recurring | Hedge derivatives, net: | Assets measured at NAV | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0
Fair Value, Recurring | Hedge derivatives, net: | Level 1 | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0
Fair Value, Recurring | Hedge derivatives, net: | Level 2 | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(5,073)
Fair Value, Recurring | Hedge derivatives, net: | Level 3 | Net investment hedge
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0
Commodity Contracts | Fair Value, Recurring | Hedge derivatives, net:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(41)	(172)
Commodity Contracts | Fair Value, Recurring | Hedge derivatives, net: | Assets measured at NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Commodity Contracts | Fair Value, Recurring | Hedge derivatives, net: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Commodity Contracts | Fair Value, Recurring | Hedge derivatives, net: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(41)	(172)
Commodity Contracts | Fair Value, Recurring | Hedge derivatives, net: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Commodity Contracts | Fair Value, Recurring | Non-hedge derivatives, net:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(6,770)	(8,638)
Commodity Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Assets measured at NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Commodity Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Commodity Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(6,770)	(8,638)
Commodity Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Foreign Exchange Contracts | Fair Value, Recurring | Hedge derivatives, net:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	1,502	(863)
Foreign Exchange Contracts | Fair Value, Recurring | Hedge derivatives, net: | Assets measured at NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Foreign Exchange Contracts | Fair Value, Recurring | Hedge derivatives, net: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Foreign Exchange Contracts | Fair Value, Recurring | Hedge derivatives, net: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	1,502	(863)
Foreign Exchange Contracts | Fair Value, Recurring | Hedge derivatives, net: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Foreign Exchange Contracts | Fair Value, Recurring | Non-hedge derivatives, net:
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(29)	(54)
Foreign Exchange Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Assets measured at NAV
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Foreign Exchange Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	0	0
Foreign Exchange Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	(29)	(54)
Foreign Exchange Contracts | Fair Value, Recurring | Non-hedge derivatives, net: | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Net position of derivative	$ 0	$ 0

Fair value measurements - Addit

Fair value measurements - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023
Fair Value Disclosures [Abstract]
Percentage of postretirement benefit plan assets comprised of pension plan assets (more than)	96%

Share-based compensation plan_2

Share-based compensation plans - Additional Information (Details) $ / shares in Units, $ in Thousands	12 Months Ended			48 Months Ended
	Dec. 31, 2023 USD ($) installment $ / shares shares	Dec. 31, 2022 USD ($) $ / shares shares	Dec. 31, 2021 USD ($) $ / shares shares	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares available for grant (in shares) | shares	5,069,768
Compensation cost for share-based payment arrangements	$ 27,780	$ 31,309	$ 22,608
Related tax benefit recognized in net income	6,920	7,999	5,715
Additional net excess tax benefit realized	$ 978	$ 1,367	$ 1,110
Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Granted, weighted-average grant date fair value (usd per share) | $ / shares	$ 56.87
Vested units in period (in shares) | shares	0
Performance Contingent Restricted Stock Units (PCSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period	3 years
Granted, weighted-average grant date fair value (usd per share) | $ / shares	$ 55.04	$ 51.94	$ 55.95
Noncash stock-based compensation associated performance contingent restricted stock units	$ 10,751	$ 17,900	$ 11,477
Total unrecognized compensation cost related to nonvested awards	$ 8,746
Weighted-average period	16 months
Performance period	3 years
Stock return payout percentage	0.20
Number of common shares to be converted into for each share upon conversion	1
Vested units in period (in shares) | shares	0
Performance Contingent Restricted Stock Units (PCSUs) | 2023 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Total performance contingent restricted stock units vested , minimum (in shares) | shares	0
Total performance contingent restricted stock units, maximum (in shares) | shares	449,255
Performance Contingent Restricted Stock Units (PCSUs) | 2022 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance period	3 years
Total performance contingent restricted stock units vested , minimum (in shares) | shares	0
Total performance contingent restricted stock units, maximum (in shares) | shares	342,808
Performance Contingent Restricted Stock Units (PCSUs) | 2021 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of vested units	$ 12,600
Total performance contingent restricted stock units, maximum (in shares) | shares	225,530
Performance Contingent Restricted Stock Units (PCSUs) | 2020 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of vested units		$ 17,052
Vested units in period (in shares) | shares		280,881
Performance Contingent Restricted Stock Units (PCSUs) | 2019 PCSU
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Fair value of vested units			$ 3,719
Vested units in period (in shares) | shares			64,243
Performance Contingent Restricted Stock Units (PCSUs) | Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	25%
Performance Contingent Restricted Stock Units (PCSUs) | Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	75%
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation cost for share-based payment arrangements	$ 0	$ 40	$ 347
Total unrecognized compensation cost related to nonvested awards	$ 0
Vesting percentage	33.33%
Aggregate intrinsic value of options and SARs exercised	$ 158	582	2,575
Weighted average remaining contractual life for SAR's, outstanding	4 years 1 month 6 days
Aggregate intrinsic value for SAR's, outstanding	$ 2,217
Fair market value of the Company’s stock used to calculate intrinsic value (usd per share) | $ / shares	$ 55.87
Stock Appreciation Rights (SARs) | Granted 2015 through 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period				3 years
Term of award	10 years
Deferred Compensation Plans
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Compensation deferrals in current year	$ 2,024	$ 2,256	$ 2,507
Executive Officers and Key Management Employees | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period	3 years
Executive Officers and Key Management Employees | Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executive Officers and Key Management Employees | Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executive Officers and Key Management Employees | Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executives and Directors | Restricted Stock Units (RSUs)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Minimum vesting period	5 years
Granted, weighted-average grant date fair value (usd per share) | $ / shares	$ 56.87	$ 53.55	$ 57.77
Fair value of vested units	$ 10,320	$ 6,243	$ 4,063
Noncash stock-based compensation associated performance contingent restricted stock units	15,005	$ 11,113	$ 8,278
Total unrecognized compensation cost related to nonvested awards	$ 11,674
Weighted-average period	26 months
Executives and Directors | Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executives and Directors | Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche Four
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Executives and Directors | Restricted Stock Units (RSUs) | Share-based Compensation Award, Tranche Five
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting percentage	33.33%
Non-employee directors | Deferred Compensation Plans | Share-based Compensation Award, Tranche One
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual distribution installments | installment	1
Non-employee directors | Deferred Compensation Plans | Share-based Compensation Award, Tranche Two
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual distribution installments | installment	3
Non-employee directors | Deferred Compensation Plans | Share-based Compensation Award, Tranche Three
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of annual distribution installments | installment	5

Share-based compensation plan_3

Share-based compensation plans - Activity Related to PCSUs, Restricted Stock Units and Deferred Compensation Plans (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Restricted Stock Units (RSUs)
Number of Shares
Beginning Balance (in shares)	535,704
Granted (in shares)	325,771
Vested (in shares)	0
Converted (in shares)	(179,198)
Cancelled (in shares)	(24,148)
Dividend equivalents (in shares)	4,131
Ending Balance (in shares)	662,260	535,704
Average Grant Date Fair Value per Share
Beginning Balance, weighted-average grant date fair value (usd per share)	$ 53.23
Granted, weighted-average grant date fair value (usd per share)	56.87
Converted, weighted-average grant date fair value (usd per share)	54.12
Cancelled, weighted-average grant date fair value (usd per share)	55.79
Dividend equivalents, weighted-average grant date fair value (usd per share)	56.97
Ending Balance, weighted-average grant date fair value (usd per share)	$ 54.71	$ 53.23
Restricted Stock Units (RSUs) | Nonvested
Number of Shares
Beginning Balance (in shares)	462,395
Granted (in shares)	325,771
Vested (in shares)	172,786
Converted (in shares)
Cancelled (in shares)	(24,148)
Dividend equivalents (in shares)	2,213
Ending Balance (in shares)	593,445	462,395
Restricted Stock Units (RSUs) | Vested
Number of Shares
Beginning Balance (in shares)	73,309
Granted (in shares)	0
Vested (in shares)	172,786
Converted (in shares)	(179,198)
Cancelled (in shares)	0
Dividend equivalents (in shares)	1,918
Ending Balance (in shares)	68,815	73,309
Performance Contingent Restricted Stock Units (PCSUs)
Number of Shares
Beginning Balance (in shares)	901,782
Granted (in shares)	205,178
Performance adjustments (in shares)	(129,224)
Vested (in shares)	0
Converted (in shares)	(291,818)
Cancelled (in shares)	(31,403)
Dividend equivalents (in shares)	380
Ending Balance (in shares)	654,895	901,782
Average Grant Date Fair Value per Share
Beginning Balance, weighted-average grant date fair value (usd per share)	$ 52.81
Granted, weighted-average grant date fair value (usd per share)	55.04	$ 51.94	$ 55.95
Performance adjustments, weighted-average grant date fair value (usd per share)	55.04
Converted, weighted-average grant date fair value (usd per share)	51.68
Cancelled, weighted-average grant date fair value (usd per share)	54.08
Dividend equivalents, weighted-average grant date fair value (usd per share)	56.99
Ending Balance, weighted-average grant date fair value (usd per share)	$ 53.51	$ 52.81
Performance Contingent Restricted Stock Units (PCSUs) | Nonvested
Number of Shares
Beginning Balance (in shares)	599,382
Granted (in shares)	205,178
Performance adjustments (in shares)	(129,224)
Vested (in shares)	225,530
Converted (in shares)	0
Cancelled (in shares)	(31,403)
Dividend equivalents (in shares)	0
Ending Balance (in shares)	418,403	599,382
Performance Contingent Restricted Stock Units (PCSUs) | Vested
Number of Shares
Beginning Balance (in shares)	302,400
Granted (in shares)	0
Performance adjustments (in shares)	0
Vested (in shares)	225,530
Converted (in shares)	(291,818)
Cancelled (in shares)	0
Dividend equivalents (in shares)	380
Ending Balance (in shares)	236,492	302,400
Deferred Compensation Plans
Number of Shares
Beginning Balance (in shares)	287,015
Deferred (in shares)	36,254
Converted (in shares)	(8,406)
Dividend equivalents (in shares)	9,739
Ending Balance (in shares)	324,602	287,015

Share-based compensation plan_4

Share-based compensation plans - Company's SARs (Details) - $ / shares	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Stock Appreciation Rights (SARs)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance (in shares)	764,806
Vested (in shares)	0
Granted (in shares)	0
Exercised (in shares)	(26,671)
Forfeited/Expired (in shares)	(8,620)
Ending Balance (in shares)	729,515	764,806
Exercisable (in shares)	729,515
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Beginning Balance, weighted-average exercise price (usd per share)	$ 54.98
Granted, weighted-average exercise price (usd per share)	0
Exercised, weighted-average exercise price (usd per share)	49.96
Forfeited/Expired, weighted average exercise price (usd per share)	0
Ending Balance, weighted average exercise price (usd per share)	55.13	$ 54.98
Exercisable, weighted-average exercise price (usd per share)	$ 55.13
Stock Appreciation Rights (SARs) | Nonvested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance (in shares)	0
Vested (in shares)	0
Granted (in shares)	0	0	0
Exercised (in shares)	0
Forfeited/Expired (in shares)	0
Ending Balance (in shares)	0	0
Exercisable (in shares)	0
Stock Appreciation Rights (SARs) | Vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Beginning Balance (in shares)	764,806
Vested (in shares)	0
Granted (in shares)	0
Exercised (in shares)	(26,671)
Forfeited/Expired (in shares)	(8,620)
Ending Balance (in shares)	729,515	764,806
Exercisable (in shares)	729,515
Performance Contingent Restricted Stock Units (PCSUs)
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted (in shares)	205,178
Performance Contingent Restricted Stock Units (PCSUs) | Nonvested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted (in shares)	205,178
Performance Contingent Restricted Stock Units (PCSUs) | Vested
Share-based Compensation Arrangement by Share-based Payment Award, Options, Outstanding [Roll Forward]
Granted (in shares)	0

Employee benefit plans - Compon

Employee benefit plans - Components of Net Periodic Benefit Cost (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 2,918	$ 3,304	$ 3,916
Interest cost	18,101	10,562	24,186
Expected return on plan assets	(9,451)	(10,302)	(22,888)
Amortization of prior service cost / (credit)	926	913	900
Amortization of net actuarial gain (loss)	4,300	6,240	16,503
Effect of settlement loss	1,010	479	550,706
Effect of curtailment loss	0	43	0
Net periodic benefit cost (income)	17,804	11,239	573,323
Retiree Health and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Service cost	230	320	374
Interest cost	507	258	197
Expected return on plan assets	(313)	(439)	(444)
Amortization of prior service cost / (credit)	0	0	0
Amortization of net actuarial gain (loss)	(768)	(681)	(744)
Net periodic benefit cost (income)	$ (344)	$ (542)	$ (617)

Employee benefit plans - Plans'

Employee benefit plans - Plans' Obligation and Assets (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Change in Plan Assets
Fair value of plan assets at January 1	$ 265,875
Fair value of plan assets at December 31	308,800	$ 265,875
Retirement Plans
Change in Benefit Obligation
Benefit obligation at January 1	352,843	514,633
Service cost	2,918	3,304	$ 3,916
Interest cost	18,101	10,562	24,186
Plan participant contributions	60	50
Plan amendments	306	665
Actuarial loss/(gain)	15,663	(124,982)
Benefits paid	(26,703)	(22,268)
Impact of foreign exchange rates	8,707	(27,273)
Effect of settlements	(2,373)	(1,736)
Effect of curtailments	0	(112)
Acquisitions	43,934	0
Benefit obligation at December 31	413,456	352,843	514,633
Change in Plan Assets
Fair value of plan assets at January 1	253,125	417,105
Actual return on plan assets	15,968	(119,714)
Company contributions	13,908	14,677
Plan participant contributions	60	50
Benefits paid	(26,703)	(22,268)
Impact of foreign exchange rates	10,388	(33,800)
Effect of settlements	(2,373)	(1,736)
Expenses paid	(1,108)	(1,189)
Acquisitions	32,322	0
Fair value of plan assets at December 31	295,587	253,125	417,105
Funded Status of the Plans	(117,869)	(99,718)
Retiree Health and Life Insurance Plans
Change in Benefit Obligation
Benefit obligation at January 1	11,244	13,745
Service cost	230	320	374
Interest cost	507	258	197
Plan participant contributions	0	0
Plan amendments	11,637	0
Actuarial loss/(gain)	(266)	(1,825)
Benefits paid	(788)	(1,224)
Impact of foreign exchange rates	7	(30)
Effect of settlements	0	0
Effect of curtailments	0	0
Acquisitions	0	0
Benefit obligation at December 31	22,571	11,244	13,745
Change in Plan Assets
Fair value of plan assets at January 1	12,750	13,942
Actual return on plan assets	553	(532)
Company contributions	754	652
Plan participant contributions	0	0
Benefits paid	(788)	(1,224)
Impact of foreign exchange rates	0	0
Effect of settlements	0	0
Expenses paid	(56)	(88)
Acquisitions	0	0
Fair value of plan assets at December 31	13,213	12,750	$ 13,942
Funded Status of the Plans	$ (9,358)	$ 1,506

Employee benefit plans - Recogn

Employee benefit plans - Recognized Amounts in Consolidated Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Total Recognized Amounts in the Consolidated Balance Sheets
Noncurrent liabilities	$ (142,900)	$ (120,084)
Retirement Plans
Total Recognized Amounts in the Consolidated Balance Sheets
Noncurrent assets	26,599	30,322
Current liabilities	(9,797)	(9,478)
Noncurrent liabilities	(134,671)	(120,562)
Net (liability)/asset	(117,869)	(99,718)
Retiree Health and Life Insurance Plans
Total Recognized Amounts in the Consolidated Balance Sheets
Noncurrent assets	0	2,919
Current liabilities	(1,801)	(1,049)
Noncurrent liabilities	(7,557)	(364)
Net (liability)/asset	$ (9,358)	$ 1,506

Employee benefit plans - Comp_2

Employee benefit plans - Component of Net Periodic Pension Cost that are Included in Accumulated Other Comprehensive Loss (Income) (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Defined Benefit Plan Disclosure [Line Items]
Loss from plan amendment affecting accumulated postretirement benefit obligation and prior service cost	$ 11,637
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss/(gain)	114,957	$ 109,558
Loss from plan amendment affecting accumulated postretirement benefit obligation and prior service cost	5,557	6,053
Amount in accumulated other comprehensive loss (income)	120,514	115,611
Retiree Health and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Net actuarial loss/(gain)	(6,120)	(6,437)
Loss from plan amendment affecting accumulated postretirement benefit obligation and prior service cost	11,637	0
Amount in accumulated other comprehensive loss (income)	$ 5,517	$ (6,437)

Employee benefit plans - Amount

Employee benefit plans - Amounts Recognized in Other Comprehensive Loss/(Income) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Retirement Plans
Adjustments arising during the period:
Net actuarial loss/(gain)	$ 10,709	$ 4,839	$ (63,684)
Prior service cost	430	678	837
Net settlements/curtailments	(1,010)	(522)	(550,706)
Amortization recognized during the period:
Net actuarial (loss)/gain	(4,300)	(6,240)	(16,503)
Prior service (cost)/credit	(926)	(913)	(900)
Total recognized in other comprehensive loss/(income)	4,903	(2,158)	(630,956)
Total recognized in net periodic benefit cost and other comprehensive loss/(income)	22,707	9,081	(57,633)
Retiree Health and Life Insurance Plans
Adjustments arising during the period:
Net actuarial loss/(gain)	(451)	(761)	(412)
Prior service cost	11,637	0	0
Net settlements/curtailments	0	0	0
Amortization recognized during the period:
Net actuarial (loss)/gain	768	681	744
Prior service (cost)/credit	0	0	0
Total recognized in other comprehensive loss/(income)	11,954	(80)	332
Total recognized in net periodic benefit cost and other comprehensive loss/(income)	$ 11,610	$ (622)	$ (285)

Employee benefit plans - Additi

Employee benefit plans - Additional Information (Details)	12 Months Ended			144 Months Ended
	Dec. 31, 2023 USD ($) participant year	Dec. 31, 2022 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2021 USD ($)	Sep. 08, 2023 USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plans, accumulated benefit obligation	$ 404,648,000	$ 347,608,000
Projected benefit obligation (PBO) with accumulated benefit obligations in excess of plan assets	229,397,000	176,702,000
Accumulated benefit obligation (ABO) with accumulated benefit obligations in excess of plan assets	224,045,000	171,705,000
Fair value of plan assets for pension plans with accumulated benefit obligations in excess of plan assets	84,929,000	48,277,000
Total postretirement benefit plan assets	308,800,000	$ 265,875,000
Loss from plan amendment affecting accumulated postretirement benefit obligation and prior service cost	11,637,000
Projected contributions to retirement plan	$ 19,000,000
Percentage of retiree health liability	98%
RTS Packaging
Defined Benefit Plan Disclosure [Line Items]
Voting interest acquired					65%
Interest held in acquiree before subsequent acquisition (percent)					35%
Accumulated other comprehensive loss including define pension plan, before tax					$ 4,756,000
Accumulated other comprehensive loss including define pension plan, after tax					3,543,000
U.K.
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	100%	100%
Canada
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	100%	100%
United States
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	100%	100%
Sonoco Savings Plan
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan contribution percentage, minimum	1%
Defined contribution plan contribution percentage, maximum	100%
Defined contribution plan, employer matching contribution (percent)			100%
Employer matching contribution, percent of employees' gross pay (percent)			6%
Percentage of participants modified matching contribution to be matched towards safe Harbor under companies savings plan				50%
Modify matching employee contribution to profit sharing under companies savings plan				4%
Companies expense related to the plan	$ 41,000,000	$ 38,900,000	$ 13,900,000
Sonoco Investment and Retirement Plan
Defined Benefit Plan Disclosure [Line Items]
Companies expense related to the plan	$ 0	0	22,914,000
Contribution rate of annual eligible earnings under companies investment and retirement plan	4%
Contribution rate of annual eligible earnings in excess of social security wage base under companies investment and retirement plan	4%
Vesting period	3 years
Age limit of participants (year) | year	55
Cash contributions to the SIRP	$ 0	21,948,000	22,665,000
RTS Packaging Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	93%
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	$ 413,456,000	352,843,000	514,633,000	$ 514,633,000
Total postretirement benefit plan assets	295,587,000	253,125,000	417,105,000	417,105,000
Accumulated other comprehensive loss including define pension plan, before tax	(114,957,000)	(109,558,000)
Loss from plan amendment affecting accumulated postretirement benefit obligation and prior service cost	5,557,000	6,053,000
Retirement Plans | Canada
Defined Benefit Plan Disclosure [Line Items]
Non-cash settlement charges	$ 1,010,000	$ 479,000	11,984,000
Retirement Plans | Equity securities | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	20%	22.60%
Current target allocation for investment portfolio	20%
Retirement Plans | Equity securities | Canada
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	29.40%	34%
Current target allocation for investment portfolio	29%
Retirement Plans | Equity securities | United States
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	22.20%	23.40%
Retirement Plans | Debt securities | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	79.10%	76.30%
Current target allocation for investment portfolio	80%
Retirement Plans | Debt securities | Canada
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	70.60%	66%
Current target allocation for investment portfolio	71%
Retirement Plans | Debt securities | United States
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	76.60%	72.90%
Retirement Plans | Cash and short-term investments | U.K.
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	0.90%	1.10%
Retirement Plans | Cash and short-term investments | Canada
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	0%	0%
Retirement Plans | Cash and short-term investments | United States
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	1.20%	3.70%
Retirement Plans | Inactive Plan Investment Portfolio
Defined Benefit Plan Disclosure [Line Items]
Projected contributions to retirement plan	$ 124,432,000
Expected settlement charge	$ 538,722,000
Number of participants | participant	11,000
Retirement Plans | Active Plan Investment Portfolio
Defined Benefit Plan Disclosure [Line Items]
Number of participants | participant	700
Retirement Plans | Active Plan Investment Portfolio | Equity securities | United States
Defined Benefit Plan Disclosure [Line Items]
Current target allocation for investment portfolio	20%
Retirement Plans | Active Plan Investment Portfolio | Debt securities | United States
Defined Benefit Plan Disclosure [Line Items]
Current target allocation for investment portfolio	80%
Retirement Plans | RTS Packaging Pension Plan | United States
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation					43,934,000
Total postretirement benefit plan assets					32,322,000
Defined benefit plan, long-term unfunded pension obligations					11,529,000
Defined benefit plan, short-term unfunded pension obligations					$ 83,000
Retirement Plans | RTS Packaging Pension Plan | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Current target allocation for investment portfolio	20%
Retirement Plans | RTS Packaging Pension Plan | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Current target allocation for investment portfolio	80%
Retiree Health and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, benefit obligation	$ 22,571,000	$ 11,244,000	13,745,000	13,745,000
Total postretirement benefit plan assets	13,213,000	12,750,000	$ 13,942,000	$ 13,942,000
Accumulated other comprehensive loss including define pension plan, before tax	6,120,000	6,437,000
Loss from plan amendment affecting accumulated postretirement benefit obligation and prior service cost	$ 11,637,000	$ 0
Total postretirement benefit plan assets (percent)	100%	100%
Retiree Health and Life Insurance Plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	0%	0%
Retiree Health and Life Insurance Plans | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	100%	100%
Retiree Health and Life Insurance Plans | Cash and short-term investments
Defined Benefit Plan Disclosure [Line Items]
Total postretirement benefit plan assets (percent)	0%	0%

Employee benefit plans - Compan

Employee benefit plans - Company's Projected Benefit Payments (Details) $ in Thousands	Dec. 31, 2023 USD ($)
Retirement Plans
Defined Benefit Plan Disclosure [Line Items]
2024	$ 29,104
2025	29,914
2026	32,028
2027	31,621
2028	31,606
2029-2033	160,293
Retiree Health and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
2024	1,853
2025	1,885
2026	2,044
2027	1,906
2028	2,159
2029-2033	$ 9,793

Employee benefit plans - Major

Employee benefit plans - Major Actuarial Assumptions Used in Determining PBO, ABO and Net Periodic Cost (Details)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
United States | Retirement Plans
Weighted-average assumptions used to determine benefit obligations
Discount Rate	4.84%	5.01%
Rate of Compensation Increase	0%	0%
Weighted-average assumptions used to determine net periodic benefit cost
Discount Rate	5.01%	2.77%	2.32%
Expected Long-term Rate of Return	2.48%	3.27%	3.27%
Rate of Compensation Increase	0%	0%	0%
United States | Retiree Health and Life Insurance Plans
Weighted-average assumptions used to determine benefit obligations
Discount Rate	4.68%	4.92%
Rate of Compensation Increase	3.03%	2.99%
Weighted-average assumptions used to determine net periodic benefit cost
Discount Rate	4.92%	2.48%	2.04%
Expected Long-term Rate of Return	2.45%	3.18%	2.01%
Rate of Compensation Increase	2.99%	3.01%	3.03%
Foreign Plans
Weighted-average assumptions used to determine benefit obligations
Discount Rate	4.79%	4.97%
Rate of Compensation Increase	3.11%	3.29%
Weighted-average assumptions used to determine net periodic benefit cost
Discount Rate	4.97%	2.22%	1.70%
Expected Long-term Rate of Return	4.70%	3%	3.69%
Rate of Compensation Increase	3.29%	3.21%	3.20%

Employee benefit plans - Health

Employee benefit plans - Health Care Cost Trend Rates Related to U.S. Plan (Details) - United States	Dec. 31, 2023	Dec. 31, 2022
Pre-age 65
Defined Benefit Plan Disclosure [Line Items]
Healthcare Cost Trend Rate	6.25%	5.80%
Ultimate Trend Rate	4.50%	4.50%
Post-age 65
Defined Benefit Plan Disclosure [Line Items]
Healthcare Cost Trend Rate	7.25%	6.50%
Ultimate Trend Rate	4.50%	4.50%

Employee benefit plans - Weight

Employee benefit plans - Weighted-Average Asset Allocations (Details)	Dec. 31, 2023	Dec. 31, 2022
United States
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	100%	100%
RTS Packaging Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	100%
U.K.
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	100%	100%
Canada
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	100%	100%
Retirement Plans | United States | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	22.20%	23.40%
Retirement Plans | United States | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	76.60%	72.90%
Retirement Plans | United States | Cash and short-term investments
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	1.20%	3.70%
Retirement Plans | RTS Packaging Pension Plan | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	18.60%
Retirement Plans | RTS Packaging Pension Plan | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	81.20%
Retirement Plans | RTS Packaging Pension Plan | Cash and short-term investments
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	0.20%
Retirement Plans | U.K. | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	20%	22.60%
Retirement Plans | U.K. | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	79.10%	76.30%
Retirement Plans | U.K. | Cash and short-term investments
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	0.90%	1.10%
Retirement Plans | Canada | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	29.40%	34%
Retirement Plans | Canada | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	70.60%	66%
Retirement Plans | Canada | Cash and short-term investments
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	0%	0%
Retiree Health and Life Insurance Plans
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	100%	100%
Retiree Health and Life Insurance Plans | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	0%	0%
Retiree Health and Life Insurance Plans | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	100%	100%
Retiree Health and Life Insurance Plans | Cash and short-term investments
Defined Benefit Plan Disclosure [Line Items]
Total (percent)	0%	0%

Income taxes - Provision for Ta

Income taxes - Provision for Taxes on Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Pretax income
Domestic	$ 400,241	$ 363,518	$ (342,951)
Foreign	214,591	207,764	181,969
Income/(Loss) before income taxes	614,832	571,282	(160,982)
Current
Federal	79,200	55,016	21,247
State	16,681	15,997	15,212
Foreign	65,617	59,762	55,018
Total current	161,498	130,775	91,477
Deferred
Federal	(5,447)	(2,495)	(120,243)
State	(2,249)	(5,441)	(39,709)
Foreign	(4,524)	(4,330)	1,045
Total deferred	(12,220)	(12,266)	(158,907)
Total taxes	$ 149,278	$ 118,509	$ (67,430)

Income taxes - Deferred Tax Ass

Income taxes - Deferred Tax Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
Income Tax Disclosure [Abstract]
Property, plant and equipment	$ (137,880)	$ (104,162)
Intangibles	(119,225)	(104,171)
Leases	(48,832)	(89,226)
Outside basis in Metal Packaging	(68,867)	(74,092)
Gross deferred tax liabilities	(374,804)	(371,651)
Retiree health benefits	513	1,222
Foreign loss carryforwards	62,250	79,460
U.S. Federal loss and credit carryforwards	39,131	36,529
Capital loss carryforwards	3,817	3,626
U.S. State loss and credit carryforwards	21,321	20,961
Capitalized research and development costs	87,743	45,826
Employee benefits	51,829	42,641
Leases	50,704	89,416
Accrued liabilities and other assets	58,699	56,601
Gross deferred tax assets	376,007	376,282
Valuation allowance on deferred tax assets	(70,661)	(82,046)
Total deferred taxes, net	$ (69,458)	$ (77,415)

Income taxes - Additional Infor

Income taxes - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2017	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Income Taxes [Line Items]
Tax credit carryforwards, foreign		$ 22,434
Capital loss carryforwards		3,817	$ 3,626
Transition tax installment period	8 years
Income taxes paid, Tax Act, transition tax for accumulated foreign earnings		1,366
Increase (decrease) in reserve for uncertain tax positions		2,183	567	$ 5,665
Tax credits		18,841	14,077	21,936
Tax credit offsetting GILTI tax		2,442	1,245
Global intangible low-taxed income (GILTI)		2,930	2,851
Net GILTI tax		488	1,606
Tax cuts and jobs act, global intangible low-tax income, net tax expense (benefit) amount		8,735
Tax Act, benefits included in valuation allowance			13,182
Undistributed earnings		1,040,580
Unrecognized tax benefits		19,241	17,821
Accrued for interest		1,773	859
Income taxes, net interest expense		914
Interest benefit			272
Interest expense		1,186
Expected decrease in reserve for uncertain tax benefits		10,018
U.S. Federal
Income Taxes [Line Items]
Loss carryforwards		79,501
Foreign
Income Taxes [Line Items]
Loss carryforwards		258,412
Capital loss carryforwards		15,256
Loss carryforwards not subject to expiration		203,574
Foreign | Next five years
Income Taxes [Line Items]
Operating loss carryforwards subject to expiration		15,178
Foreign | Tax years, 2029 - 2043
Income Taxes [Line Items]
Operating loss carryforwards subject to expiration		39,660
State
Income Taxes [Line Items]
Loss carryforwards		10,113
State credit carry forwards		16,876
Uncertain Items Arising During Year
Income Taxes [Line Items]
Increase (decrease) in reserve for uncertain tax positions		3,074	2,051	2,330
Uncertain Items Arising During Prior Years
Income Taxes [Line Items]
Increase (decrease) in reserve for uncertain tax positions		$ (891)	$ (1,484)	$ 3,743

Income taxes - Reconciliation o

Income taxes - Reconciliation of U.S. Federal Statutory Tax Rate to Actual Consolidated Tax Expense (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory tax rate	$ 129,115	$ 119,945	$ (33,806)
State income taxes, net of federal tax benefit	16,051	13,149	(15,863)
Valuation allowance	4,486	(10,477)	(33,576)
Tax examinations including change in reserve for uncertain tax positions	2,183	567	5,665
Adjustments to prior year deferred taxes	(2,489)	(2,110)	1,239
Foreign earnings taxed at other than U.S. rates	13,704	12,334	9,659
Divestiture of business	464	0	(808)
Effect of tax rate changes	387	(2,151)	275
Foreign withholding taxes	4,635	4,670	8,107
Tax credits	(18,841)	(14,077)	(21,936)
Global intangible low-taxed income (GILTI)	2,930	2,851	11,323
Foreign-derived intangible income	(1,106)	(657)	(202)
Foreign currency gain/(loss) on distributions of previously taxed income	(2,614)	(1,280)	3,365
Other, net	373	(4,255)	(872)
Total taxes	$ 149,278	$ 118,509	$ (67,430)
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Statutory tax rate (percent)	21%	21%	21%
State income taxes, net of federal tax benefit (percent)	2.60%	2.30%	9.90%
Valuation allowance (percent)	0.70%	(1.80%)	20.90%
Tax examinations including change in reserve for uncertain tax positions (percent)	0.40%	0.10%	(3.50%)
Adjustments to prior year deferred taxes (percent)	(0.40%)	(0.40%)	(0.80%)
Foreign earnings taxed at other than U.S. rates (percent)	2.20%	2.20%	(6.00%)
Disposition of business (percent)	0.10%	0%	0.50%
Effect of tax rate changes (percent)	0.10%	(0.40%)	(0.20%)
Deduction related to qualified production activities (percent)	0.80%	0.80%	(5.00%)
Tax credit (percent)	(3.10%)	(2.50%)	13.60%
Global intangible low-tax income (GILTI) (percent)	0.50%	0.50%	(7.00%)
Foreign-derivative intangible income (percent)	(0.20%)	(0.10%)	0.10%
Foreign currency gain/(loss) on distributions of previously taxed income (percent)	(0.40%)	(0.20%)	(2.10%)
Other, net (percent)	0.10%	(0.70%)	0.50%
Total taxes (percent)	24.30%	20.70%	41.90%

Income taxes - Reconciliation_2

Income taxes - Reconciliation of Gross Amounts of Unrecognized Tax Benefits (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Gross unrecognized tax benefits, Beginning Balance	$ 18,621	$ 18,142	$ 11,230
Increases in prior years’ unrecognized tax benefits	378	223	12,283
Decreases in prior years’ unrecognized tax benefits	(572)	(144)	(275)
Increases in current year’s unrecognized tax benefits	4,395	1,807	1,088
Decreases in unrecognized tax benefits from the lapse of statutes of limitations	(1,094)	(1,174)	(6,170)
Settlements	(51)	(233)	(14)
Gross unrecognized tax benefits, Ending Balance	$ 21,677	$ 18,621	$ 18,142

Revenue Recognition - Disaggreg

Revenue Recognition - Disaggregated Revenues (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Disaggregation of Revenue [Line Items]
Net Sales	$ 6,781,292	$ 7,250,552	$ 5,590,438
United States
Disaggregation of Revenue [Line Items]
Net Sales	4,818,736	5,232,092	3,650,090
Europe
Disaggregation of Revenue [Line Items]
Net Sales	921,347	961,697	941,655
Canada
Disaggregation of Revenue [Line Items]
Net Sales	216,690	227,668	212,272
Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales	335,557	373,734	401,003
Other
Disaggregation of Revenue [Line Items]
Net Sales	488,962	455,361	385,418
Operating segments | Consumer Packaging
Disaggregation of Revenue [Line Items]
Net Sales	3,626,977	3,767,956	2,368,347
Operating segments | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Net Sales	2,374,113	2,684,563	2,464,312
Operating segments | United States | Consumer Packaging
Disaggregation of Revenue [Line Items]
Net Sales	2,779,749	2,960,098	1,607,810
Operating segments | United States | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Net Sales	1,389,492	1,611,390	1,421,684
Operating segments | Europe | Consumer Packaging
Disaggregation of Revenue [Line Items]
Net Sales	451,990	442,743	444,734
Operating segments | Europe | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Net Sales	389,261	434,076	408,093
Operating segments | Canada | Consumer Packaging
Disaggregation of Revenue [Line Items]
Net Sales	116,595	117,671	117,492
Operating segments | Canada | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Net Sales	100,095	109,997	94,780
Operating segments | Asia Pacific | Consumer Packaging
Disaggregation of Revenue [Line Items]
Net Sales	100,299	97,182	82,882
Operating segments | Asia Pacific | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Net Sales	233,446	275,395	316,841
Operating segments | Other | Consumer Packaging
Disaggregation of Revenue [Line Items]
Net Sales	178,344	150,262	115,429
Operating segments | Other | Industrial Paper Packaging
Disaggregation of Revenue [Line Items]
Net Sales	261,819	253,705	222,914
All Other
Disaggregation of Revenue [Line Items]
Net Sales	780,202	798,033	757,779
All Other | United States
Disaggregation of Revenue [Line Items]
Net Sales	649,495	660,604	620,596
All Other | Europe
Disaggregation of Revenue [Line Items]
Net Sales	80,096	84,878	88,828
All Other | Canada
Disaggregation of Revenue [Line Items]
Net Sales	0	0	0
All Other | Asia Pacific
Disaggregation of Revenue [Line Items]
Net Sales	1,812	1,157	1,280
All Other | Other
Disaggregation of Revenue [Line Items]
Net Sales	$ 48,799	$ 51,394	$ 47,075

Revenue Recognition - Contract

Revenue Recognition - Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Revenue from Contract with Customer [Abstract]
Contract Assets	$ 54,334	$ 56,008	$ 51,106
Contract Liabilities	$ (24,973)	$ (22,423)	$ (18,993)

Revenue Recognition - Significa

Revenue Recognition - Significant Changes in Contract Assets and Liabilities (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Contract Asset
Beginning balance	$ 56,008	$ 51,106
Acquired as part of a business combination	0	8,107
Increases due to rights to consideration for customer specific goods produced, but not billed during the period	54,334	56,008
Transferred to receivables from contract assets recognized at the beginning of the period and acquired as part of business combination	(56,008)	(59,213)
Ending balance	54,334	56,008
Contract Liability
Beginning balance	(22,423)	(18,993)
Acquired as part of a business combination	(1,436)	(5,418)
Revenue deferred or rebates accrued	(53,464)	(57,510)
Recognized as revenue	11,761	18,201
Rebates paid to customers	40,589	41,297
Ending balance	$ (24,973)	$ (22,423)

Commitments and contingencies (

Commitments and contingencies (Details) - USD ($) $ in Thousands	146 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Site Contingency [Line Items]
Environmental accrual	$ 7,251	$ 7,265
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other	Accrued expenses and other
Total future payments	$ 244,867
Payments in 2024	102,713
Payments in 2025	97,458
Payments in 2026	35,742
Payments in 2027	8,954
Payments in 2028 - 2032	0
Multiple sites
Site Contingency [Line Items]
Environmental accrual	1,992	$ 1,840
Tegrant Holding Corporation
Site Contingency [Line Items]
Payment towards remediation of sites	2,141
Tegrant Holding Corporation | Spartanburg, South Carolina Site
Site Contingency [Line Items]
Environmental accrual	$ 5,259	$ 5,425

Shareholders_ equity and earn_3

Shareholders’ equity and earnings per share - Additional Information (Details) $ / shares in Units, $ in Thousands							3 Months Ended	12 Months Ended
	Mar. 31, 2022 USD ($) partner	Oct. 25, 2021 shares	Jul. 26, 2021 USD ($) $ / shares shares	Jul. 21, 2021 USD ($) position $ / shares shares	May 10, 2021 USD ($) $ / shares shares	May 06, 2021 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Dec. 31, 2021 USD ($) $ / shares shares	Apr. 20, 2021 USD ($)	Apr. 30, 2015
Equity [Line Items]
Number of shares authorized for repurchase											$ 350,000
Number of shares available for repurchase (in shares)							$ 137,972	$ 137,972
Number of shares repurchased (in shares) | shares		976,191				53,500		0	0
Up-front payment to repurchase shares						$ 3,615		$ 10,617	$ 4,547	$ 218,085
Stock repurchased and retired (in shares) | shares							58,413,000
Potentially dilutive securities excluded from the computation of diluted net loss (in usd per share) | $ / shares										$ 470,000
Purchase of noncontrolling interest	$ 14,474							0	14,474	$ 0
Writeoff of book value									13,196
Capital in excess of stated value							$ 159,047	159,047	$ 140,539
Graffo Paranaense de Embalagens S/A
Equity [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent												67%
Percentage of ownership of Graffo												33%
Number of partners | partner	3
Writeoff of book value								6,116
Capital in excess of stated value							$ 7,080	7,080
Increase (Decrease) in Accrued Liabilities								$ 1,278
Tax Withholding Obligations
Equity [Line Items]
Number of shares repurchased (in shares) | shares								175,665	79,347	99,824
Cost of shares repurchased								$ 10,617	$ 4,547	$ 6,057
Capital in Excess of Stated Value
Equity [Line Items]
Writeoff of book value									$ (7,080)
Accelerated Share Repurchase Program
Equity [Line Items]
Number of shares repurchased (in shares) | shares			336,996	167,743	1,751,825
Up-front payment to repurchase shares					$ 150,000
Percentage of expected shares to be repurchased (percent)					80%
Average price (in usd per share) | $ / shares					$ 68.50
Number of tranches | position				2
Effective settlement price (in usd per share) | $ / shares			$ 66.45	$ 66.52
Settlement of notional transactional value			$ 100,000	$ 50,000

Shareholders_ equity and earn_4

Shareholders’ equity and earnings per share - Earnings Per Share (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Numerator:
Net income/(loss) attributable to Sonoco	$ 474,959	$ 466,437	$ (85,477)
Denominator:
Weighted average common shares outstanding (in shares)	98,294	97,991	99,608
Dilutive effect of stock-based compensation (in shares)	596	741	0
Diluted (in shares)	98,890	98,732	99,608
Income/(Loss) available to common shareholders:
Basic (usd per share)	$ 4.83	$ 4.76	$ (0.86)
Diluted (usd per share)	4.80	4.72	(0.86)
Cash dividends (usd per share)	$ 2.02	$ 1.92	$ 1.80

Shareholders_ equity and earn_5

Shareholders’ equity and earnings per share - Shares Not Included in Computations of Diluted Income Per Share (Details) - shares shares in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Equity [Abstract]
Anti-dilutive stock appreciation rights (in shares)	352	373	202

Segment Reporting - Additional

Segment Reporting - Additional Information (Details)	12 Months Ended
	Dec. 31, 2023 segment
Segment Reporting [Abstract]
Number of reportable segments (segment)	2

Segment reporting - Financial S

Segment reporting - Financial Segment Information (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Total Revenue
Total Revenue	$ 6,905,475	$ 7,401,804	$ 5,720,438
Net sales	6,781,292	7,250,552	5,590,438
Income Before Income Taxes
Income Before Income Taxes	614,832	571,282	(160,982)
Identifiable Assets
Identifiable Assets	7,191,957	7,052,940	5,073,235
Depreciation, Depletion and Amortization
Depreciation, Depletion and Amortization	340,988	308,824	245,184
Capital Expenditures
Capital Expenditures	363,077	328,769	256,019
Intersubsegment Sales
Total Revenue
Total Revenue	124,183	151,252	130,000
Operating segments | Consumer Packaging
Total Revenue
Total Revenue	3,639,759	3,774,957	2,373,583
Net sales	3,626,977	3,767,956	2,368,347
Income Before Income Taxes
Income Before Income Taxes	382,063	526,028	274,926
Identifiable Assets
Identifiable Assets	3,682,650	3,825,675	1,956,688
Depreciation, Depletion and Amortization
Depreciation, Depletion and Amortization	124,483	111,599	78,802
Capital Expenditures
Capital Expenditures	186,109	127,478	60,532
Operating segments | Industrial Paper Packaging
Total Revenue
Total Revenue	2,475,935	2,818,778	2,578,379
Net sales	2,374,113	2,684,563	2,464,312
Income Before Income Taxes
Income Before Income Taxes	313,545	327,859	226,798
Identifiable Assets
Identifiable Assets	2,559,026	2,079,326	1,971,293
Depreciation, Depletion and Amortization
Depreciation, Depletion and Amortization	104,722	91,944	91,141
Capital Expenditures
Capital Expenditures	111,619	145,021	150,225
Operating segments | Intersubsegment Sales | Consumer Packaging
Total Revenue
Total Revenue	12,782	7,001	5,236
Operating segments | Intersubsegment Sales | Industrial Paper Packaging
Total Revenue
Total Revenue	101,822	134,215	114,067
All Other
Total Revenue
Total Revenue	789,781	808,069	768,476
Net sales	780,202	798,033	757,779
Income Before Income Taxes
Income Before Income Taxes	103,745	65,978	63,060
Identifiable Assets
Identifiable Assets	825,003	871,800	886,647
Depreciation, Depletion and Amortization
Depreciation, Depletion and Amortization	24,519	24,854	25,822
Capital Expenditures
Capital Expenditures	24,838	21,177	22,780
All Other | Intersubsegment Sales
Total Revenue
Total Revenue	9,579	10,036	10,697
Corporate
Income Before Income Taxes
Income Before Income Taxes	(184,521)	(348,583)	(725,766)
Identifiable Assets
Identifiable Assets	125,278	276,139	258,607
Depreciation, Depletion and Amortization
Depreciation, Depletion and Amortization	87,264	80,427	49,419
Capital Expenditures
Capital Expenditures	$ 40,511	$ 35,093	$ 22,482

Segment reporting - Restructuri

Segment reporting - Restructuring Asset Impairment and Acquisition Related Costs (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Segment Reporting Information [Line Items]
Restructuring, asset impairment and acquisition-related costs	$ (184,521)	$ (348,583)	$ (725,765)
Operating segments | Consumer Packaging
Segment Reporting Information [Line Items]
Restructuring, asset impairment and acquisition-related costs	(56,237)	(138,343)	(25,983)
Operating segments | Industrial Paper Packaging
Segment Reporting Information [Line Items]
Restructuring, asset impairment and acquisition-related costs	17,064	(40,805)	(2,570)
All Other
Segment Reporting Information [Line Items]
Restructuring, asset impairment and acquisition-related costs	(24,486)	(18,800)	(23,312)
Corporate
Segment Reporting Information [Line Items]
Restructuring, asset impairment and acquisition-related costs	$ (120,862)	$ (150,635)	$ (673,900)

Segment reporting - Sales to Un

Segment reporting - Sales to Unaffiliated Customers and Long-Lived Assets by Geographic Region (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Sales to Unaffiliated Customers
Net Sales	$ 6,781,292	$ 7,250,552	$ 5,590,438
Long-lived Assets
Long-lived Assets	4,626,861	4,186,480	2,954,499
United States
Sales to Unaffiliated Customers
Net Sales	4,818,736	5,232,092	3,650,090
Long-lived Assets
Long-lived Assets	3,504,438	3,240,011	2,078,342
Europe
Sales to Unaffiliated Customers
Net Sales	921,347	961,697	941,655
Long-lived Assets
Long-lived Assets	653,730	607,996	545,211
Canada
Sales to Unaffiliated Customers
Net Sales	216,690	227,668	212,272
Long-lived Assets
Long-lived Assets	113,888	96,210	104,913
Asia Pacific
Sales to Unaffiliated Customers
Net Sales	335,557	373,734	401,003
Long-lived Assets
Long-lived Assets	158,301	157,030	157,084
Other
Sales to Unaffiliated Customers
Net Sales	488,962	455,361	385,418
Long-lived Assets
Long-lived Assets	$ 196,504	$ 85,233	$ 68,949

Accumulated other comprehensi_3

Accumulated other comprehensive loss - Accumulated Other Comprehensive Income Loss and Changes in Accumulated Other Comprehensive Loss, Net of Tax (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	$ 2,072,797	$ 1,849,541	$ 1,910,528
Other comprehensive income/(loss)	63,391	(70,198)	396,833
Ending Balance	2,431,835	2,072,797	1,849,541
Foreign Currency Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(338,316)	(269,076)
Other comprehensive income/(loss) before reclassifications	68,705	(72,987)
Other comprehensive income/(loss)	70,738	(69,240)
Ending Balance	(267,578)	(338,316)	(269,076)
Foreign Currency Items | Fixed assets
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	0	0
Foreign Currency Items | Net Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	2,033	3,747
Defined Benefit Pension Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(90,973)	(91,397)
Other comprehensive income/(loss) before reclassifications	(16,305)	(3,471)
Other comprehensive income/(loss)	(8,654)	424
Ending Balance	(99,627)	(90,973)	(91,397)
Defined Benefit Pension Items | Fixed assets
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	0	0
Defined Benefit Pension Items | Net Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	7,651	3,895
Gains and Losses on Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(794)	1,048
Other comprehensive income/(loss) before reclassifications	6,622	3,244
Other comprehensive income/(loss)	1,737	(1,842)
Ending Balance	943	(794)	1,048
Gains and Losses on Cash Flow Hedges | Fixed assets
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	292	507
Gains and Losses on Cash Flow Hedges | Net Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	(5,177)	(5,593)
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning Balance	(430,083)	(359,425)
Other comprehensive income/(loss) before reclassifications	59,022	(73,214)
Other comprehensive income/(loss)	63,821	(70,658)
Ending Balance	(366,262)	(430,083)	$ (359,425)
Accumulated Other Comprehensive Loss | Fixed assets
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	292	507
Accumulated Other Comprehensive Loss | Net Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Amounts reclassified from accumulated other comprehensive income	$ 4,507	$ 2,049

Accumulated Other Comprehensi_4

Accumulated Other Comprehensive Loss - Effects on Net Income of Significant Amounts Reclassified from Accumulated Other Comprehensive Loss (Details) - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on Russia restructuring		$ (56,933)	$ (56,910)	$ (14,210)
Other income, net		39,657	0	0
Net income/(loss)		475,901	466,980	(82,711)
Income/(loss) before income taxes		614,832	571,282	(160,982)
Income Tax Expense (Benefit)		(149,278)	(118,509)	67,430
Net Sales		6,781,292	7,250,552	5,590,438
Cost of sales		(5,345,638)	(5,810,903)	$ (4,528,528)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income/(loss)		(4,507)	(2,049)
Reclassification out of Accumulated Other Comprehensive Income | Foreign Currency Items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Loss on Russia restructuring		0	(3,747)
Other income, net	$ (2,033)		0
Net income/(loss)		(2,033)	(3,747)
Reclassification out of Accumulated Other Comprehensive Income | Pension-related loss upon purchase of remaining interest in RTS Packaging joint venture
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income, net		(4,756)	0
Reclassification out of Accumulated Other Comprehensive Income | Effect of settlement loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-operating pension costs		(1,010)	(479)
Reclassification out of Accumulated Other Comprehensive Income | Effect of curtailment loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Non-operating pension costs		0	(43)
Reclassification out of Accumulated Other Comprehensive Income | Amortization of defined benefit pension items
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income/(loss)		(7,651)	(3,895)
Non-operating pension costs		(4,458)	(6,472)
Income/(loss) before income taxes		(10,224)	(6,994)
Income Tax Expense (Benefit)		2,573	3,099
Reclassification out of Accumulated Other Comprehensive Income | Gains and Losses on Cash Flow Hedges
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income/(loss)		5,177	5,593
Income/(loss) before income taxes		7,100	7,556
Income Tax Expense (Benefit)		(1,923)	(1,963)
Reclassification out of Accumulated Other Comprehensive Income | Gains and Losses on Cash Flow Hedges | Foreign Exchange Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Sales		10,860	3,460
Cost of sales		(3,728)	(2,852)
Reclassification out of Accumulated Other Comprehensive Income | Gains and Losses on Cash Flow Hedges | Commodity Contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales		$ (32)	$ 6,948

Accumulated other comprehensi_5

Accumulated other comprehensive loss - Components of Other Comprehensive Income (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Gains and losses on cash flow hedges:
Defined benefit plan adjustment		$ 1,391
Foreign Currency Items
Gains and losses on cash flow hedges:
Other comprehensive income/(loss) before reclassifications, Before Tax Amount	$ 67,411	(72,987)
Other comprehensive income/(loss) before reclassifications, Tax (Expense) Benefit	1,294	0
Other comprehensive income/(loss) before reclassifications	68,705	(72,987)
Other comprehensive income/(loss), Before Tax Amount	69,444	(69,240)
Other comprehensive income/(loss), Tax (Expense) Benefit	1,294	0
Other comprehensive income/(loss)	70,738	(69,240)
Defined Benefit Pension Items
Gains and losses on cash flow hedges:
Other comprehensive income/(loss) before reclassifications, Before Tax Amount	(21,815)	(3,365)
Other comprehensive income/(loss) before reclassifications, Tax (Expense) Benefit	5,510	(106)
Other comprehensive income/(loss) before reclassifications	(16,305)	(3,471)
Other comprehensive income/(loss), Before Tax Amount	(11,591)	3,629
Other comprehensive income/(loss), Tax (Expense) Benefit	2,937	(3,205)
Other comprehensive income/(loss)	(8,654)	424
Gains and Losses on Cash Flow Hedges
Gains and losses on cash flow hedges:
Other comprehensive income/(loss) before reclassifications, Before Tax Amount	9,081	4,312
Other comprehensive income/(loss) before reclassifications, Tax (Expense) Benefit	(2,459)	(1,068)
Other comprehensive income/(loss) before reclassifications	6,622	3,244
Other comprehensive income/(loss), Before Tax Amount	2,382	(2,439)
Other comprehensive income/(loss), Tax (Expense) Benefit	(645)	597
Other comprehensive income/(loss)	1,737	(1,842)
Other comprehensive income/(loss)
Gains and losses on cash flow hedges:
Other comprehensive income/(loss), Before Tax Amount	60,235	(68,050)
Other comprehensive income/(loss), Tax (Expense) Benefit	3,586	(2,608)
Other comprehensive income/(loss)	63,821	(70,658)
Fixed assets | Gains and Losses on Cash Flow Hedges
Gains and losses on cash flow hedges:
Amounts reclassified from accumulated other comprehensive income/(loss), Before Tax Amount	401	805
Amounts reclassified from accumulated other comprehensive income/(loss), Tax (Expense) Benefit	(109)	(298)
Amounts reclassified from accumulated other comprehensive income/(loss)	292	507
Net Income | Foreign Currency Items
Gains and losses on cash flow hedges:
Amounts reclassified from accumulated other comprehensive income/(loss), Before Tax Amount	2,033	3,747
Amounts reclassified from accumulated other comprehensive income/(loss), Tax (Expense) Benefit	0	0
Amounts reclassified from accumulated other comprehensive income/(loss)	2,033	3,747
Net Income | Defined Benefit Pension Items
Gains and losses on cash flow hedges:
Amounts reclassified from accumulated other comprehensive income/(loss), Before Tax Amount	10,224	6,994
Amounts reclassified from accumulated other comprehensive income/(loss), Tax (Expense) Benefit	(2,573)	(3,099)
Amounts reclassified from accumulated other comprehensive income/(loss)	7,651	3,895
Net Income | Gains and Losses on Cash Flow Hedges
Gains and losses on cash flow hedges:
Amounts reclassified from accumulated other comprehensive income/(loss), Before Tax Amount	(7,100)	(7,556)
Amounts reclassified from accumulated other comprehensive income/(loss), Tax (Expense) Benefit	1,923	1,963
Amounts reclassified from accumulated other comprehensive income/(loss)	$ (5,177)	$ (5,593)

Subsequent Events - Additional

Subsequent Events - Additional Information (Details) - Subsequent event - Dispositions - Black Diamond Capital Management LLC $ in Thousands	Jan. 30, 2024 USD ($) employee facility
Subsequent Event [Line Items]
Consideration for disposal of business held for sale | $	$ 80,000
Number of manufacturing and fulfillment facilities | facility	9
Approximate number of employees (employee) | employee	900

Schedule II - Valuation and Q_2

Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Allowance for Doubtful Accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	$ 16,879	$ 19,651	$ 20,920
Charged to Costs and Expenses	7,361	(327)	(824)
Charged to Other	180	(108)	(18)
Deductions	2,759	2,337	427
Balance at End of Year	21,661	16,879	19,651
LIFO Reserve
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	51,342	22,900	20,317
Charged to Costs and Expenses	(11,814)	28,442	2,583
Charged to Other	0	0	0
Deductions	0	0	0
Balance at End of Year	39,528	51,342	22,900
Valuation Allowance on Deferred Tax Assets
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at Beginning of Year	82,046	93,992	128,435
Charged to Costs and Expenses	4,487	(10,582)	(33,532)
Charged to Other	(15,872)	(1,440)	(866)
Deductions	0	(76)	45
Balance at End of Year	$ 70,661	$ 82,046	$ 93,992