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Goodwill and Purchased Intangible Assets - Goodwill Rollforward (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Goodwill [Roll Forward]
Goodwill, beginning of period	$ 3,734.4	$ 3,762.1
Other	0.0	(27.7)
Goodwill, end of period	3,734.4	$ 3,734.4
Disposal Group, Held-for-sale, Not Discontinued Operations \| Silicon Photonics Business
Goodwill [Roll Forward]
Disposal group, including discontinued operation, goodwill	$ 28.9

Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

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