Goodwill and Other Intangible Assets - Narrative (Details) $ in Millions				3 Months Ended		9 Months Ended	12 Months Ended
	Nov. 07, 2023 USD ($)	Aug. 15, 2022 USD ($)	Aug. 03, 2022 USD ($)	Jun. 29, 2024 USD ($)	Sep. 30, 2023 business	Mar. 30, 2024 USD ($)	Jun. 29, 2024 USD ($)	Jul. 01, 2023 USD ($)	Jul. 02, 2022 USD ($)
Acquired Finite-Lived Intangible Assets
Goodwill, acquired during period							$ 360.7
Number of businesses acquired | business					2
Goodwill				$ 1,055.8			1,055.8	$ 695.1	$ 368.9
Amortization and write-off of acquired intangible assets							150.6	127.7	85.5
Acquired intangible assets			$ 452.5
Restructuring and related charges				35.8		$ 36.8	72.6	28.1	(1.1)
Business exit costs							6.7
In Process Research and Development
Acquired Finite-Lived Intangible Assets
Amortization and write-off of acquired intangible assets							0.3	2.6
Intangible asset write-off				29.1
Cloud & Networking
Acquired Finite-Lived Intangible Assets
Goodwill, acquired during period							360.7
Goodwill				$ 1,044.6			1,044.6	683.9	$ 357.7
Cloud Light Technology Limited
Acquired Finite-Lived Intangible Assets
Goodwill	$ 360.7
Acquired intangible assets	333.0
Cloud Light Technology Limited | Acquired developed technologies
Acquired Finite-Lived Intangible Assets
Acquired intangible assets	170.0
Cloud Light Technology Limited | In Process Research and Development
Acquired Finite-Lived Intangible Assets
Acquired intangible assets	16.0
Cloud Light Technology Limited | Customer relationships
Acquired Finite-Lived Intangible Assets
Acquired intangible assets	130.0
Cloud Light Technology Limited | Cloud & Networking
Acquired Finite-Lived Intangible Assets
Goodwill, acquired during period	$ 359.5
NeoPhotonics Corporation
Acquired Finite-Lived Intangible Assets
Goodwill, acquired during period								315.3
Goodwill			315.3
Intangible asset write-off								21.3
NeoPhotonics Corporation | Acquired developed technologies
Acquired Finite-Lived Intangible Assets
Finite-lived intangible assets, period increase (decrease)							1.9	23.3
NeoPhotonics Corporation | Acquired developed technologies | Adjustments
Acquired Finite-Lived Intangible Assets
Finite-lived intangible assets, period increase (decrease)							10.3
NeoPhotonics Corporation | In Process Research and Development
Acquired Finite-Lived Intangible Assets
Finite-lived intangible assets, period increase (decrease)							(1.9)	(23.3)
Amortization and write-off of acquired intangible assets							0.1
Intangible asset write-off								$ 12.9
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]								Research and development
NeoPhotonics Corporation | In Process Research and Development | Adjustments
Acquired Finite-Lived Intangible Assets
Finite-lived intangible assets, period increase (decrease)							$ (10.3)
NeoPhotonics Corporation | Cloud & Networking
Acquired Finite-Lived Intangible Assets
Goodwill, acquired during period			$ 318.3					$ 315.3
IPG
Acquired Finite-Lived Intangible Assets
Goodwill, acquired during period								10.9
Goodwill		$ 10.9
IPG | Acquired developed technologies
Acquired Finite-Lived Intangible Assets
Intangible asset write-off								$ 6.8
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]								Cost of sales
IPG | Customer relationships
Acquired Finite-Lived Intangible Assets
Intangible asset write-off								$ 1.6
Impairment, Intangible Asset, Finite-Lived, Statement of Income or Comprehensive Income [Extensible Enumeration]								Selling, general and administrative
IPG | Cloud & Networking
Acquired Finite-Lived Intangible Assets
Goodwill, acquired during period		$ 6.5						$ 10.9