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Investments, Forward Contracts and Fair Value Measurements - Gross Unrealized Losses on Available-For-Sale Securities (Details) - USD ($) $ in Millions | Jun. 29, 2019 | Jun. 30, 2018
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Available-For-Sale Investments |  |
Less than 12 Months | $ 0.0 | $ (0.6)
Greater than 12 Months | (0.3) | (0.6)
Total | (0.3) | (1.2)
U.S. treasuries and agencies |  |
Available-For-Sale Investments |  |
Less than 12 Months |  | (0.1)
Greater than 12 Months |  | (0.1)
Total |  | (0.2)
Asset-backed securities |  |
Available-For-Sale Investments |  |
Less than 12 Months | 0.0 | (0.1)
Greater than 12 Months | (0.3) | (0.3)
Total | $ (0.3) | (0.4)
Corporate securities |  |
Available-For-Sale Investments |  |
Less than 12 Months |  | (0.4)
Greater than 12 Months |  | (0.2)
Total |  | $ (0.6)

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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27337-111563 + Details
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- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=82897076&loc=d3e27290-111563 + Details
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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. + Details
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