v3.24.0.1
Restructuring Costs - Activity within Liability Established for Restructuring Actions (Detail) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Restructuring Cost and Reserve [Line Items]      
Beginning balance $ 59.4    
Additional expense, net 29.7 $ 63.0 $ 85.1
Ending balance 11.8 59.4  
CommScope NEXT Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Beginning balance 58.7 60.3  
Additional expense (income), net 29.7 59.4  
Cash received (paid) (43.2) (49.2)  
Foreign exchange and other non-cash items (33.5) (11.8)  
Ending balance 11.7 58.7 60.3
Employee-Related Costs [Member] | CommScope NEXT Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Beginning balance 58.7 60.3  
Additional expense (income), net 63.6 50.8  
Cash received (paid) (110.8) (48.7)  
Foreign exchange and other non-cash items 0.2 (3.7)  
Ending balance 11.7 58.7 60.3
Other Costs [Member] | CommScope NEXT Restructuring Plan [Member]      
Restructuring Cost and Reserve [Line Items]      
Beginning balance 0.0 0.0  
Additional expense (income), net (33.9) 8.6  
Cash received (paid) 67.6 (0.5)  
Foreign exchange and other non-cash items (33.7) (8.1)  
Ending balance $ 0.0 $ 0.0 $ 0.0