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Shareholders' Equity - Earnings Per Share (Details) - USD ($)
$ / shares in Units, shares in Thousands, $ in Thousands
3 Months Ended
Mar. 10, 2021
Apr. 04, 2021
Mar. 29, 2020
Numerator:      
Net income attributable to Sonoco   $ 72,297 $ 80,445
Denominator:      
Basic (in shares)   101,046 100,855
Dilutive effect of stock-based compensation (in shares)   446 216
Diluted (in shares)   101,492 101,071
Net income attributable to Sonoco per common share:      
Basic (in usd per share)   $ 0.72 $ 0.80
Diluted (in usd per share)   0.71 0.80
Cash dividends (in usd per share) $ 0.45 $ 0.45 $ 0.43