Significant Accounting Policies (Narrative) (Details)	12 Months Ended
	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