XML 74 R63.htm IDEA: XBRL DOCUMENT v3.21.2
Employee Benefit Plans - Additional Information (Details) - USD ($)
 3 Months Ended 6 Months Ended
Jul. 04, 2021
Jun. 28, 2020
Jul. 04, 2021
Jun. 28, 2020
Defined Benefit Plan Disclosure [Line Items]        
Contributions     $ 139,687,000 $ 8,602,000
Expected contributions for remainder of fiscal year $ 7,000,000   7,000,000  
Pension Plan        
Defined Benefit Plan Disclosure [Line Items]        
Settlement losses recognized 547,631,000 $ 38,000 547,631,000 661,000
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 5,499,000 $ 5,716,000 11,834,000 11,694,000
Pension Plan | Sonoco Pension Plan for Inactive Participants        
Defined Benefit Plan Disclosure [Line Items]        
Expected contributions for remainder of fiscal year 133,000,000   133,000,000  
Non-cash settlement charges expected to be incurred next year $ 547,291,000      
Settlement losses recognized     $ 340,000 $ 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%