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Restructuring, Asset Impairments and Other Charges, net - Summary of Restructuring, Asset Impairments and Other, Net (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]      
Restructuring $ 24.9 $ 3.9 $ 9.9
Asset Impairments 3.4 4.6 7.3
Other 0.4 (4.2) 3.6
Total 28.7 4.3 20.8
Impairment charges for ROU assets 2.5    
Impairment charges   4.6 7.3
Other      
Restructuring Cost and Reserve [Line Items]      
Restructuring 0.8 3.9 0.1
Asset Impairments 3.4 4.6 7.3
Other 0.4 (4.2) 3.6
Total 4.6 $ 4.3 11.0
General workforce reduction      
Restructuring Cost and Reserve [Line Items]      
Restructuring 8.4    
Asset Impairments 0.0    
Other 0.0    
Total 8.4    
Post-Quantenna acquisition restructuring      
Restructuring Cost and Reserve [Line Items]      
Restructuring 15.7    
Asset Impairments 0.0    
Other 0.0    
Total $ 15.7    
Post-Fairchild acquisition restructuring costs      
Restructuring Cost and Reserve [Line Items]      
Restructuring     9.7
Asset Impairments     0.0
Other     0.0
Total     9.7
Manufacturing relocation      
Restructuring Cost and Reserve [Line Items]      
Restructuring     (2.1)
Asset Impairments     0.0
Other     0.0
Total     (2.1)
Former System Solutions Group segment voluntary workforce reduction      
Restructuring Cost and Reserve [Line Items]      
Restructuring     2.2
Asset Impairments     0.0
Other     0.0
Total     $ 2.2