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Acquisitions - Preliminary identified intangible assets acquired (Details) - USD ($) $ in Millions |  |  | 12 Months Ended |  |
--- | --- | --- | --- | --- | ---
Mar. 15, 2018 | Aug. 09, 2017 | Jun. 30, 2018 | Jul. 01, 2017 | Jul. 02, 2016
Business Acquisition [Line Items] |  |  |  |  |
Goodwill |  |  | $ 336.3 | $ 151.6 | $ 152.1
AW |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |
Tangible assets acquired | $ 65.5 |  |  |  |
Intangible assets acquired |  |  | 232.0 |  |
Goodwill | 172.3 |  |  |  |
Total consideration transferred | 469.8 |  |  |  |
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 |  |  |
Intangible assets acquired |  |  | $ 26.8 |  |
Goodwill |  | 17.8 |  |  |
Total consideration transferred |  | 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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