Income Taxes - Components Giving Rise to Net Deferred Tax Assets (Liabilities) included in Accompanying Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Jun. 30, 2019	Jun. 24, 2018
Operating Loss Carryforwards [Line Items]
Assets	$ 5.6	$ 5.8
Liabilities	(2.0)	(3.1)
U.S. federal income taxes
Operating Loss Carryforwards [Line Items]
Assets	0.0	0.0
Liabilities	0.0	(2.1)
Foreign income taxes
Operating Loss Carryforwards [Line Items]
Assets	5.6	5.8
Liabilities	$ (2.0)	$ (1.0)

Amount after allocation of valuation allowances of deferred tax asset attributable to deductible temporary differences and carryforwards classified as noncurrent.

Reference 1: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 9
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e31958-109318

Reference 2: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e31917-109318

Reference 3: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 6
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e31931-109318

Reference 4: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 45
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=116821951&loc=d3e31928-109318

Reference 5: http://fasb.org/us-gaap/role/ref/otherTransitionRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32537-109319

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