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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2016
Accounting Policies [Abstract]  
Company Held Significant Investment
Affiliated companies over which the Company exercised a significant influence at December 31, 2016, included:
Entity
Ownership Interest
Percentage at
December 31, 2016
RTS Packaging JVCO
35.0
%
Cascades Conversion, Inc.
50.0
%
Cascades Sonoco, Inc.
50.0
%
Showa Products Company Ltd.
20.0
%
Conitex Sonoco Holding BVI Ltd.
30.0
%
Weidenhammer New Packaging, LLC
40.0
%