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Employee Benefit Plans - Additional Information (Details) - USD ($) |  | 1 Months Ended | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Sep. 30, 2021 | Oct. 31, 2021 | Oct. 03, 2021 | Jul. 04, 2021 | Sep. 27, 2020 | Oct. 03, 2021 | Sep. 27, 2020
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Contributions |  |  |  |  |  | $ 142,615,000 | $ 12,292,000
Expected contributions for remainder of fiscal year |  |  | $ 6,500,000 |  |  | 6,500,000 |
Effect of curtailment loss |  |  |  |  |  |  | (31,000)
Sonoco Savings Plan |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Employer matching contribution, percent of employees' gross pay (percent) | 4.00% |  |  |  |  |  |
Defined contribution plan, employer matching contribution (percent) | 50.00% |  |  |  |  |  |
Sonoco Savings Plan | Subsequent Event |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Employer matching contribution, percent of employees' gross pay (percent) |  | 6.00% |  |  |  |  |
Defined contribution plan, employer matching contribution (percent) |  | 100.00% |  |  |  |  |
Pension Plan |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Settlement losses recognized |  |  | 21,000 |  | $ 0 | 547,652,000 | 661,000
Effect of curtailment loss |  |  | 0 |  | 0 | 0 | 31,000
Pension Plan | Sonoco Retirement Contribution |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Contributions |  |  |  |  |  | 22,665,000 | 22,503,000
Expected contributions for remainder of fiscal year |  |  | 0 |  |  | 0 |
Recognized expense related to the plan |  |  | $ 5,456,000 |  | $ 5,589,000 | 17,290,000 | 17,283,000
Pension Plan | Sonoco Pension Plan for Inactive Participants |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
Contributions |  |  |  | $ 133,000,000 |  |  |
Non-cash settlement charges expected to be incurred next year |  |  |  | $ 547,291,000 |  |  |
Settlement losses recognized |  |  |  |  |  | $ 361,000 | $ 661,000
Pension Plan | United States | Sonoco Retirement Contribution |  |  |  |  |  |  |
Defined Benefit Plan Disclosure [Line Items] |  |  |  |  |  |  |
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 of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2709-114920 Reference 4: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 5: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 18 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4587-114921 Reference 6: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 Reference 7: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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