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Shareholders' Equity - Earnings (Loss) per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
 3 Months Ended 9 Months Ended
Sep. 10, 2021
Oct. 03, 2021
Sep. 27, 2020
Oct. 03, 2021
Sep. 27, 2020
Numerator:          
Net income/(loss) attributable to Sonoco   $ 111,140 $ 83,449 $ (150,634) $ 219,105
Denominator:          
Basic (in shares)   98,955 100,974 100,039 100,935
Dilutive effect of stock-based compensation (in shares)   470 271 0 220
Diluted (in shares)   99,425 101,245 100,039 101,155
Net income/(loss) attributable to Sonoco per common share:          
Basic (in usd per share)   $ 1.12 $ 0.83 $ (1.51) $ 2.17
Diluted (in usd per share)   1.12 0.82 (1.51) 2.17
Cash dividends (in usd per share) $ 0.45 $ 0.45 $ 0.43 $ 1.35 $ 1.29