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Employee Benefit Plans - Additional Information (Details) - USD ($) |  |  | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | ---
Jan. 01, 2022 | Dec. 31, 2021 | Oct. 01, 2023 | Oct. 02, 2022 | Oct. 01, 2023 | Oct. 02, 2022 | Sep. 08, 2023 | Sep. 07, 2023
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Contributions |  |  |  |  | $ 10,311,000 | $ 11,600,000 |  |
Expected contributions for remainder of fiscal year |  |  | $ 4,400,000 |  | $ 4,400,000 |  |  |
RTS Packaging |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Voting interest acquired |  |  | 65.00% |  | 65.00% |  | 65.00% |
Interest held in acquiree before subsequent acquisition (percent) |  |  |  |  |  |  | 35.00% | 35.00%
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 |
Retirement Plans |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Settlement losses recognized |  |  | $ 16,000 | $ 0 | $ 765,000 | 430,000 |  |
Sonoco Pension Plan for Inactive Participants | Retirement Plans |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Settlement losses recognized |  |  |  |  | 765,000 | 430,000 |  |
RTS Packaging Pension Plan | Retirement Plans | United States |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Defined benefit plan, benefit obligation |  |  |  |  |  |  | 43,547,000 |
Deferred compensation plan assets |  |  |  |  |  |  | $ 33,109,000 |
Defined benefit plan, unfunded status obligation |  |  | 10,438,000 |  | $ 10,438,000 |  |  |
Sonoco Savings Plan | United States |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Contribution percentage minimum (percent) |  |  |  |  | 1.00% |  |  |
Contribution percentage maximum (percent) |  |  |  |  | 100.00% |  |  |
Defined contribution plan, employer matching contribution (percent) | 100.00% | 50.00% |  |  |  |  |  |
Employer matching contribution, percent of employees' gross pay (percent) | 6.00% | 4.00% |  |  |  |  |  |
Sonoco Retirement Contribution | Retirement Plans | United States |  |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |  |
Contributions |  |  |  |  |  | $ 21,948,000 |  |
Expected contributions for remainder of fiscal year |  |  | $ 0 |  | $ 0 |  |  |
Employer matching contribution, percent of employees' gross pay (percent) |  |  |  |  | 4.00% |  |  |
Employer matching contribution, percent of employees' gross pay in excess of social security (percent) |  |  |  |  | 4.00% |  |  |

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- Definition Amount, after tax, of accumulated other comprehensive (income) loss for defined benefit plan, that has not been recognized in net periodic benefit cost (credit). + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section 45 -Paragraph 14A -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-14A Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 10A -Subparagraph (i-k) -SubTopic 10 -Topic 220 -Publisher FASB -URI https://asc.fasb.org//1943274/2147482790/220-10-45-10A Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 1 -Subparagraph (j) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-1 + Details
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- Definition Amount of contribution expected to be received by defined benefit plan from employer in remainder of current fiscal year. Excludes contribution previously paid by employer in current fiscal year. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 55 -Paragraph 18 -Publisher FASB -URI https://asc.fasb.org//1943274/2147480482/715-20-55-18 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Topic 715 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 6 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org//1943274/2147480506/715-20-50-6 + Details
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