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Restructuring, Asset Impairments and Other Charges, net - Narrative (Details) $ in Millions		3 Months Ended				9 Months Ended	12 Months Ended
	Dec. 31, 2020 USD ($) employees	Dec. 31, 2020 USD ($) employees	Jul. 03, 2020 USD ($) segment	Apr. 03, 2020 USD ($) employee	Jun. 28, 2019 employee	Oct. 02, 2020 USD ($) employees	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($) employee	Dec. 31, 2018 USD ($)
Restructuring Cost and Reserve [Line Items]
Restructuring, asset impairments and other charges, net							$ 65.2	$ 28.7	$ 4.3
Accrued liabilities	$ 6.2	$ 6.2					6.2	0.2	$ 0.5
Charges							51.6	24.9
Voluntary separation program | Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee				243
Restructuring, asset impairments and other charges, net				$ 27.5			27.5
2020 Involuntary separation program
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | segment			191
Severance Costs			$ 11.8
2020 Involuntary separation program | Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring, asset impairments and other charges, net							11.8
General workforce reduction
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employees	67	106				153
Severance Costs		$ 6.1				$ 6.2
Accrued liabilities	$ 5.3	$ 5.3					5.3
General workforce reduction | Workforce Reduction
Restructuring Cost and Reserve [Line Items]
Restructuring, asset impairments and other charges, net							12.3	$ 8.4
General workforce reduction | Employee Severance
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee								143
Charges							$ 8.4
Post-Quantenna acquisition restructuring
Restructuring Cost and Reserve [Line Items]
Restructuring, asset impairments and other charges, net								$ 15.7
Charges								$ 15.7
Post-Quantenna acquisition restructuring | Employee Severance
Restructuring Cost and Reserve [Line Items]
Number of positions eliminated | employee					8			10

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