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Employee Pension and Other Benefit Plans - Additional Information (Details) £ in Millions | 12 Months Ended
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Jun. 30, 2018 USD ($) | Jun. 30, 2018 GBP (£) | Jul. 01, 2017 USD ($) | Jul. 01, 2017 GBP (£) | Jul. 02, 2016 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 | $ 18,500 |  |  |  |
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 | $ 4,200,000 |  | $ 4,100,000 |  | $ 4,700,000
Employee Defined Benefit Plans |  |  |  |  |
Required contributions expected in next fiscal year | $ 0 |  |  |  |
Minimum maturity period for investment in index-linked Gilts | 5 years | 5 years |  |  |
Pension Benefit Plans |  |  |  |  |
Employee Defined Benefit Plans |  |  |  |  |
Benefit obligation | $ 136,700,000 |  | 133,400,000 |  | $ 134,600,000
Future amortization of losses | 1,900,000 |  |  |  |
Employer contributions | 6,100,000 |  | 4,000,000 |  |
Other Post Retirement Benefit Plans |  |  |  |  |
Employee Defined Benefit Plans |  |  |  |  |
Benefit obligation | 400,000 |  | 1,100,000 |  |
United Kingdom | Pension Benefit Plans |  |  |  |  |
Employee Defined Benefit Plans |  |  |  |  |
Employer contributions | $ 1,000,000 | £ 0.8 | $ 600,000 | £ 0.5 |

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- Definition Amount of contribution received by defined benefit plan from employer which increases plan assets. + References Reference 1: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=112275985&loc=d3e4179-114921 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(iv)(01) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (d)(ii) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 6 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e2709-114920 Reference 5: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount included in accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan expected to be recognized in net periodic benefit (cost) credit for fiscal year following most recent annual statement of financial position. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (s) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Amount of contributions expected to be received by defined benefit plan from employer in next fiscal year following latest fiscal year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=108410482&loc=d3e1928-114920 + Details
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- Definition Maximum amount the employee may contribute to a defined contribution plan. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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