Period over which grantee's right to exercise award under share-based payment arrangement is no longer contingent on satisfaction of service or performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. Includes, but is not limited to, combination of market, performance or service condition.

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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardVestingPeriod1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Basis Of Presentation Stock-Based Compensation (Details)				12 Months Ended
	Jan. 15, 2019	Jan. 15, 2018	Jan. 15, 2017	Dec. 29, 2019
Management [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Award Vesting Period	3 years	3 years	3 years
Management [Member] \| Minimum [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Award Vesting Period				3 years
Director [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Award Vesting Period		3 years	3 years