Goodwill and Intangible Assets - Narrative (Details) - USD ($)	12 Months Ended
	Dec. 28, 2019	Dec. 29, 2018	Oct. 01, 2018
Acquired Finite-Lived Intangible Assets [Line Items]
Accumulated impairment loss	$ 0
Amortization expense	59,900,000	$ 52,800,000
Developed technology
Acquired Finite-Lived Intangible Assets [Line Items]
Finite-lived intangible assets, period increase (decrease)	$ 17,800,000
Finite-lived intangible asset, useful life	5 years
Telecom Holding Parent LLC
Acquired Finite-Lived Intangible Assets [Line Items]
Intangible assets, net	$ 200,700,000		$ 200,700,000