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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Jun. 29, 2024	Jun. 27, 2026	Jun. 28, 2025	Jun. 29, 2024
Intangible Asset, Finite-Lived, Acquired
Amortization and write-off of acquired intangible assets		$ 135.7	$ 149.7	$ 150.6
In-process research and development
Intangible Asset, Finite-Lived, Acquired
Amortization and write-off of acquired intangible assets			0.2
Intangible asset write-off	$ 29.1		2.7
Neo Photonics \| In-process research and development
Intangible Asset, Finite-Lived, Acquired
Write-off of IPR&D		$ 2.5
Intangible Asset, Excluding Goodwill, Impairment Loss, Statement of Income or Comprehensive Income [Extensible Enumeration]		Research and development
Cloud Light Technology Limited \| Acquired developed technologies
Intangible Asset, Finite-Lived, Acquired
Finite-lived intangible assets, period increase (decrease)			4.3
Cloud Light Technology Limited \| In-process research and development
Intangible Asset, Finite-Lived, Acquired
Finite-lived intangible assets, period increase (decrease)			(4.3)
Intangible asset write-off			0.6
NeoPhotonics Corporation \| In-process research and development
Intangible Asset, Finite-Lived, Acquired
Intangible asset write-off			$ 2.0