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Common Stock And Earnings Per Share (Schedule Of Shares Not Included In The Computation Of Diluted EPS) (Details) - shares shares in Thousands	3 Months Ended	6 Months Ended
	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Common Stock And Earnings Per Share [Abstract]
Equity awards for the following shares were not included in the computation of diluted EPS due to the fact that their effect would be anti-dilutive:	2,059	901	2,119

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- Definition

Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

+ Details

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

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- References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration