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Significant Accounting Policies (Narrative) (Details) | 12 Months Ended
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Dec. 28, 2019 | Dec. 29, 2018
Organization, Consolidation and Presentation of Financial Statements [Abstract] |  |
Description of threshold limit of income tax positions | for those tax positions that meet the more-likely-than-not recognition threshold, the Company recognizes the largest amount of tax benefit that has a greater than 50% likelihood of being realized upon ultimate settlement with the related tax authority |
Description of trade receivable balance | no customer's balance represented 10% or more of the Company's consolidated trade receivables balance | no customer's balance represented 10% or more of the Company's consolidated trade receivables balance
Operating Cycle | The fiscal year of the Company consists of a 52- or 53-week period ending on the Saturday closest to December 31. Fiscal years 2019, 2018 and 2017 were each 52-week periods ending on December 28, 2019, December 29, 2018 and December 30, 2017, respectively. Fiscal year 2020 will be a 53-week period ending on January 2, 2021, with quarterly periods ending on March 28, June 27, and September 26, 2020 |

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