Accumulated Other Comprehensive Income (Loss) and Shareholders' Equity (Director Plan Issued Common Stock) (Details) - shares	12 Months Ended
Dec. 28, 2019	Dec. 29, 2018	Dec. 30, 2017
Director plan
Class of Stock [Line Items]
Corporation common stock issued (shares)	37,269	27,745	27,196

Number of shares issued pursuant to the terms of a deferred compensation arrangement.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (l)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Name:	us-gaap_DeferredCompensationArrangementWithIndividualSharesIssued
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration