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Acquisitions - Purchase Price Allocation (Details) - USD ($) $ in Millions | Mar. 28, 2020 | Jun. 29, 2019 | May 31, 2019 | Oct. 30, 2018
--- | --- | --- | --- | ---
Business Acquisition [Line Items] |  |  |  |
Goodwill | $ 376.2 | $ 381.1 |  |
3Z Telecom, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Tangible assets acquired |  |  | $ 4.1 |
Goodwill |  |  | 12.2 |
Total consideration transferred |  |  | 28.7 |
3Z Telecom, Inc. | Developed technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible assets acquired |  |  | 4.4 |
3Z Telecom, Inc. | Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible assets acquired |  |  | 7.9 |
3Z Telecom, Inc. | Customer Backlog |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible assets acquired |  |  | $ 0.1 |
RPC Photonics, Inc. |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Tangible assets acquired |  |  |  | $ 5.7
Goodwill |  |  |  | 33.9
Total consideration transferred |  |  |  | 69.6
RPC Photonics, Inc. | Developed technology |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible assets acquired |  |  |  | 15.7
RPC Photonics, Inc. | Customer relationships |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible assets acquired |  |  |  | 14.0
RPC Photonics, Inc. | Customer Backlog |  |  |  |
Business Acquisition [Line Items] |  |  |  |
Intangible assets acquired |  |  |  | $ 0.3

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