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Employee Pension and Other Benefit Plans - Assets at Fair Value and Assets Allocations (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jun. 27, 2015
Asset category
Minimum maturity period for investment in index-linked Gilts	5 years
Pension Benefit Plans
Asset category
Fair value of total plan assets	$ 28.3	$ 27.2	$ 30.2
Percentage of Plan Assets	100.00%	100.00%
Pension Benefit Plans | Quoted Prices in Active Markets for Identical Assets (Level 1)
Asset category
Fair value of total plan assets	$ 0.1	$ 0.6
Pension Benefit Plans | Significant Other Observable Inputs (Level 2)
Asset category
Fair value of total plan assets	$ 28.2	$ 26.6
Pension Benefit Plans | Global equity
Asset category
Target Allocation	40.00%	40.00%
Fair value of total plan assets	$ 11.7	$ 10.5
Percentage of Plan Assets	41.30%	38.60%
Pension Benefit Plans | Global equity | Significant Other Observable Inputs (Level 2)
Asset category
Fair value of total plan assets	$ 11.7	$ 10.5
Pension Benefit Plans | Fixed income
Asset category
Target Allocation	40.00%	40.00%
Fair value of total plan assets	$ 10.7	$ 10.7
Percentage of Plan Assets	37.80%	39.30%
Pension Benefit Plans | Fixed income | Significant Other Observable Inputs (Level 2)
Asset category
Fair value of total plan assets	$ 10.7	$ 10.7
Pension Benefit Plans | Other
Asset category
Target Allocation	20.00%	20.00%
Fair value of total plan assets	$ 5.8	$ 5.4
Percentage of Plan Assets	20.50%	19.90%
Pension Benefit Plans | Other | Significant Other Observable Inputs (Level 2)
Asset category
Fair value of total plan assets	$ 5.8	$ 5.4
Pension Benefit Plans | Cash
Asset category
Fair value of total plan assets	$ 0.1	$ 0.6
Percentage of Plan Assets	0.40%	2.20%
Pension Benefit Plans | Cash | Quoted Prices in Active Markets for Identical Assets (Level 1)
Asset category
Fair value of total plan assets	$ 0.1	$ 0.6

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- References

No definition available.

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- Definition

Fair value of assets that have been segregated and restricted to provide pension or postretirement benefits. Assets include, but are not limited to, stocks, bonds, other investments, earnings from investments, and contributions by the employer and employees.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 50
-URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12355-114930

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Plan Assets
-URI http://asc.fasb.org/extlink&oid=6749337

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Plan Assets
-URI http://asc.fasb.org/extlink&oid=6520858

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- Definition

Target allocation of investments of this type to total plan assets presented on a weighted average basis.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)(i)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
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-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Represents the minimum maturity period for fixed income plan assets invested in indexed-linked gilts.

+ References

No definition available.

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