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Acquisitions - Preliminary Identified Intangible Assets Acquired (Details) - USD ($) $ in Millions | Jun. 27, 2020 | Jun. 29, 2019 | May 31, 2019 | Oct. 30, 2018 | Jun. 30, 2018 | Mar. 15, 2018 | Aug. 09, 2017
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Business Acquisition [Line Items] |  |  |  |  |  |  |
Goodwill, net | $ 381.4 | $ 381.1 |  |  | $ 336.3 |  |
3Z Telecom, Inc. |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Tangible assets acquired: |  |  | $ 4.1 |  |  |  |
Goodwill, net |  |  | 12.2 |  |  |  |
Total purchase price |  |  | 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, net |  |  |  | 33.9 |  |  |
Total purchase price |  |  |  | 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 |  |  |
AW |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Tangible assets acquired: |  |  |  |  |  | $ 59.0 |
Goodwill, net |  |  |  |  |  | 175.8 |
Total purchase price |  |  |  |  |  | 466.8 |
AW | Developed technology |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  | 113.5 |
AW | Customer relationships |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  | 75.0 |
AW | Trade names |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  | 28.0 |
AW | In-process research and development |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  | 9.0 |
AW | Customer backlog |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  | $ 6.5 |
Trilithic |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Tangible assets acquired: |  |  |  |  |  |  | $ 11.8
Goodwill, net |  |  |  |  |  |  | 17.8
Total purchase price |  |  |  |  |  |  | 56.4
Trilithic | Developed technology |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  |  | 15.5
Trilithic | Customer relationships |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  |  | 11.0
Trilithic | Other |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |
Intangible assets acquired: |  |  |  |  |  |  | $ 0.3

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