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Fair Value Measurements - Narrative (Details) - USD ($) $ in Millions |  | 12 Months Ended
--- | --- | ---
Oct. 30, 2018 | Jun. 27, 2020 | Jun. 29, 2019 | Jun. 30, 2018
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability |  | $ 9.9 | $ 38.4 |
Net change in fair value of contingent liabilities |  | (31.5) | (5.9) | $ 0.0
RPC Photonics, Inc. |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Contingent consideration liability, up to | $ 53.0 |  |  |
Contingent consideration period | 4 years |  |  |
Contingent consideration liability | $ 36.2 | 0.0 |  |
Contingent Consideration |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Net change in fair value of contingent liabilities |  | 31.5 | 5.9 |
Remeasurement of fair value |  | 9.9 | 38.4 | 0.0
Contingent Consideration | RPC Photonics, Inc. |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Net change in fair value of contingent liabilities |  | 29.6 | 5.9 |
Earn-out payment |  | 0.7 |  |
Remeasurement of fair value |  | $ 0.0 | $ 30.3 | $ 0.0

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- Definition For contingent consideration arrangements recognized in connection with a business combination, this element represents an estimate of the high-end of the potential range (undiscounted) of the consideration which may be paid. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (c)(3) -URI http://asc.fasb.org/extlink&oid=120321790&loc=d3e6927-128479 + Details
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- Definition Amount of settlements of financial instrument classified as a liability measured using unobservable inputs that reflect the entity's own assumption about the assumptions market participants would use in pricing. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 820 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(2) -URI http://asc.fasb.org/extlink&oid=117815213&loc=d3e19207-110258 + Details
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