v3.26.3
Restructuring Costs - Activity within Liability Established for Restructuring Actions (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Sep. 30, 2026
Sep. 30, 2026
Restructuring Cost and Reserve [Line Items]    
Beginning balance   $ 2.3
Ending Balance $ 4.4 4.4
CommScope NEXT Restructuring Plan [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 7.5 2.3
Additional expense, net 2.1 17.2
Cash received (paid) (5.2) (15.1)
Ending Balance 4.4 4.4
Employee-Related Costs [Member] | CommScope NEXT Restructuring Plan [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 7.5 2.3
Additional expense, net 2.1 16.7
Cash received (paid) (5.2) (14.6)
Ending Balance 4.4 4.4
Other Costs [Member] | CommScope NEXT Restructuring Plan [Member]    
Restructuring Cost and Reserve [Line Items]    
Beginning balance 0.0 0.0
Additional expense, net 0.0 0.5
Cash received (paid) 0.0 (0.5)
Ending Balance $ 0.0 $ 0.0