v3.26.1
Restructuring Costs - Activity within Liability Established for Restructuring Actions (Detail) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2026
Restructuring Cost and Reserve [Line Items]    
Beginning balance   $ 2.3
Ending Balance $ 7.5 7.5
CommScope NEXT Restructuring Plan [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 3.7 2.3
Additional expense, net 8.4 15.1
Cash received (paid) (4.6) (9.9)
Foreign exchange and other non-cash items 0.0 0.0
Ending Balance 7.5 7.5
Employee-Related Costs [Member] | CommScope NEXT Restructuring Plan [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 3.7 2.3
Additional expense, net 8.0 14.6
Cash received (paid) (4.2) (9.4)
Foreign exchange and other non-cash items (0.0) (0.0)
Ending Balance 7.5 7.5
Other Costs [Member] | CommScope NEXT Restructuring Plan [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 0.0 0.0
Additional expense, net 0.4 0.5
Cash received (paid) (0.4) (0.5)
Foreign exchange and other non-cash items 0.0 0.0
Ending Balance $ 0.0 $ 0.0