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Employee Pension and Other Benefit Plans - Additional Information (Details) £ in Millions		12 Months Ended
	Aug. 01, 2015 USD ($)	Jul. 01, 2017 USD ($)	Jul. 01, 2017 GBP (£)	Jul. 02, 2016 USD ($)	Jul. 02, 2016 GBP (£)	Jun. 27, 2015 USD ($)
Employee 401(k) Plans
Maximum contribution by an employee, as percentage of annual compensation		50.00%	50.00%
Maximum amount of contribution by an employee in a calendar year		$ 18,000
Period of service required for eligibility under matching contributions		180 days	180 days
Employer match of employee's contributions of the first 3% of eligible compensation (as a percent)		100.00%	100.00%
Percentage of eligible compensation, matched 100% by employer		3.00%	3.00%
Employer match of employee's contributions of the next 2% of eligible compensation (as a percent)		50.00%	50.00%
Percentage of eligible compensation, matched 50% by employer		2.00%	2.00%
Company's matching contribution to the plan		$ 4,100,000		$ 4,700,000		$ 4,800,000
Employee Defined Benefit Plans
Minimum maturity period for investment in index-linked Gilts		5 years	5 years
Required contributions expected in next fiscal year		$ 0
Pension Benefit Plans
Employee Defined Benefit Plans
Benefit obligation		133,400,000		134,600,000		$ 121,200,000
Future amortization of losses		1,400,000
Employer contributions		4,000,000		4,600,000
Other Post Retirement Benefit Plans
Employee Defined Benefit Plans
Benefit obligation		1,100,000		1,100,000
Switzerland
Employee Defined Benefit Plans
Transfer of liabilities from plan in spin-off	$ 6,700,000
Transfer of assets from plan in spin-off	$ 4,600,000
U.K. | Foreign Pension Plan
Employee Defined Benefit Plans
Employer contributions		$ 600,000	£ 0.5	$ 700,000	£ 0.5

X

- Definition

1) For defined benefit pension plans, the benefit obligation is the projected benefit obligation, which is the actuarial present value as of a date of all benefits attributed by the pension benefit formula to employee service rendered prior to that date. 2) For other postretirement defined benefit plans, the benefit obligation is the accumulated postretirement benefit obligation, which is the actuarial present value of benefits attributed to employee service rendered to a particular date.

+ References

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Projected Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6522206

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Accumulated Postretirement Benefit Obligation
-URI http://asc.fasb.org/extlink&oid=6503904

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X

- Definition

Amount of contributions made by the employer to defined benefit plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (d)(5)(ii)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 60
-Section 35
-Paragraph 123
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-URI http://asc.fasb.org/extlink&oid=64937487&loc=d3e36068-114959

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
-Section 35
-Paragraph 63
-Subparagraph B
-URI http://asc.fasb.org/extlink&oid=64937038&loc=d3e12551-114930

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-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

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
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-Section 50
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-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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- Definition

The amount of decrease in the plan benefit obligation attributed to the sale, liquidation, spin-off or other divestiture of a corporate division or subsidiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (a)(9)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

The amount of decrease in the plan assets attributed to the sale, liquidation, spin-off or other divestiture of a corporate division or subsidiary.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (b)(7)
-URI http://asc.fasb.org/extlink&oid=65897934&loc=d3e1928-114920

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- Definition

Amount included in accumulated other comprehensive income (AOCI) related to gain (loss) expected to be recognized as components of net periodic benefit cost for the fiscal year that follows the most recent annual statement of financial position.

+ References

No definition available.

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- Definition

Amount of employer's best estimate of contributions expected to be paid to the plan during the next fiscal year beginning after the date of the latest statement of financial position.

+ References

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

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X

- Definition

The amount of the cost recognized during the period for defined contribution plans.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 70
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- Definition

Maximum amount the employee may contribute to a defined contribution plan.

+ References

No definition available.

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- Definition

Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan.

+ References

No definition available.

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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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- Definition

Represents the first level of employee's contributions expressed as a percentage of compensation which is matched by the employer.

+ References

No definition available.

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X

- Definition

Represents the second level of employee' contributions expressed as a percentage of compensation which is matched by the employer.

+ References

No definition available.

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- Definition

Represents the employer matching contribution of the first level of employee's contributions.

+ References

No definition available.

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- Definition

Represents the employer matching contribution of the second level of employee's contributions.

+ References

No definition available.

+ Details

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- Definition

Represents the period of service required for eligibility under matching contributions by the employer.

+ References

No definition available.

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- References

No definition available.

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