Retirement Plans and Postretirement Costs (Details 4) $ in Thousands	12 Months Ended
Jul. 02, 2017 USD ($)
Significant Effect of Health Care Trend on the Postretirement Benefit
Effect on postretirement benefit obligation as of July 2, 2017, 1% Increase	$ 7
Effect on postretirement benefit obligation as of July 2, 2017, 1% Decrease	$ (7)

Amount of effect of a one-percentage-point decrease in the assumed health care cost trend rates on the accumulated postretirement benefit obligation for health care benefits.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (m)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration