Acquisitions - Narrative (Details) - USD ($) $ in Millions					3 Months Ended	12 Months Ended
	May 31, 2019	Oct. 30, 2018	Mar. 15, 2018	Aug. 09, 2017	Jun. 29, 2019	Jun. 27, 2020	Jun. 29, 2019
Business Acquisition [Line Items]
Contingent consideration liability					$ 38.4	$ 9.9	$ 38.4
Consideration paid for asset acquisitions							7.7
Cash paid for asset acquisitions							5.1
Asset acquisition earn-out liabilities assumed							2.6
Asset acquisition, deferred tax liability					$ 2.4		$ 2.4
Developed technology
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life						3 years 8 months 12 days	4 years 8 months 12 days
Intangible assets acquired							$ 7.6
Developed technology | Minimum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life							5 years
Developed technology | Maximum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life							10 years
3Z Telecom, Inc.
Business Acquisition [Line Items]
Cash consideration	$ 23.2
Contingent consideration liability, up to	7.0
Escrow payments	$ 4.3
Contingent consideration period	2 years
Total consideration of acquisition	$ 28.7
Contingent consideration liability	$ 5.5
3Z Telecom, Inc. | Minimum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life	5 years
3Z Telecom, Inc. | Maximum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life	6 years
3Z Telecom, Inc. | Customer backlog
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life	1 year
RPC Photonics, Inc.
Business Acquisition [Line Items]
Cash consideration		$ 33.4
Contingent consideration liability, up to		53.0
Escrow payments		$ 3.5
Contingent consideration period		4 years
Total consideration of acquisition		$ 69.6
Contingent consideration liability		$ 36.2				$ 0.0
RPC Photonics, Inc. | Minimum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life		6 years
RPC Photonics, Inc. | Maximum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life		7 years
RPC Photonics, Inc. | Customer backlog
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life		1 year
AW
Business Acquisition [Line Items]
Cash consideration			$ 466.8
Deferred tax liability			$ 23.7
AW | Customer backlog
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life			1 year
AW | Intangible assets, except IPR&D | Minimum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life			3 years
AW | Intangible assets, except IPR&D | Maximum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life			6 years
AW | Developed technology
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life					6 years
Trilithic
Business Acquisition [Line Items]
Cash consideration				$ 56.4
Trilithic | Acquired developed technology and customer relationships | Minimum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life				3 years
Trilithic | Acquired developed technology and customer relationships | Maximum
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life				5 years
Other acquisitions
Business Acquisition [Line Items]
Cash consideration						5.2
Total consideration of acquisition						10.7
Contingent consideration liability						5.5
Deferred tax liability						$ 1.4
Other acquisitions | Acquired developed technology and customer relationships
Business Acquisition [Line Items]
Weighted-Average Remaining Useful Life						6 years
Other acquisitions | Developed technology
Business Acquisition [Line Items]
Intangible assets acquired						$ 6.2