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Net Sales (Narrative) (Details) - Sales Revenue, Net [Member] - Maximum [Member]
3 Months Ended
Apr. 29, 2018
Geographic Concentration Risk [Member] | Outside the U.S. [Member]  
Revenue, Major Customer [Line Items]  
Concentration Risk, Percentage 10.00%
Customer Concentration Risk [Member]  
Revenue, Major Customer [Line Items]  
Concentration Risk, Percentage 10.00%