Restructuring, Asset Impairments and Other, Net - Narrative (Details) $ in Millions	3 Months Ended	6 Months Ended	9 Months Ended
	Sep. 27, 2019 USD ($) employee	Jun. 28, 2019 employee	Sep. 27, 2019 USD ($) employee	Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Charges			$ 24.8
Accrued restructuring expense	$ 2.6		$ 2.6	$ 0.5
Post-Quantenna Acquisition Restructuring
Restructuring Cost and Reserve [Line Items]
Charges	15.6
Employee severance | Cost Reduction Plan
Restructuring Cost and Reserve [Line Items]
Expected Number of Positions Eliminated | employee			143
Number of Positions Eliminated | employee			139
Charges	0.6		$ 8.4
Accrued restructuring expense	$ 0.3		0.3
Employee severance | Post-Quantenna Acquisition Restructuring
Restructuring Cost and Reserve [Line Items]
Number of Positions Eliminated | employee	9	8
Accrued restructuring expense	$ 1.1		$ 1.1