Fair Value (Significant Unobservable Inputs (Level 3), Reconciliation) (Details) - USD ($)	Jun. 30, 2017	Jul. 01, 2016
Recurring basis [Member] \| Significant Unobservable Inputs (Level 3) [Member] \| Auction rate securities [Member]
Fair Value Measurements Using Significant Unobservable Inputs (Level 3), reconciliation
Level 3 assets	$ 0	$ 0

Fair value of financial instrument classified as an asset measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=66048111&loc=d3e19207-110258

Name:	us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant