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Significant Accounting Policies (Narrative) (Details)
 6 Months Ended
Jul. 03, 2021
Accounting Policies [Abstract]  
Operating cycle of company The fiscal year of the Company consists of a 52- or 53-week period ending on the Saturday closest to December 31. Fiscal year 2021 is a 52-week period ending on January 1, 2022, with quarterly periods ending on April 3, 2021, July 3, 2021, and October 2, 2021. Fiscal year 2020 was a 53-week period ending on January 2, 2021, with quarterly periods ending on March 28, 2020, June 27, 2020, and September 26, 2020.