v3.25.2
Goodwill - Goodwill by Reportable Segment (Detail) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2025
Dec. 31, 2024
Goodwill [Line Items]    
Goodwill, gross, Beginning balance $ 4,852.4 $ 4,793.1
Accumulated Impairment Losses (1,925.8) (1,925.8)
Goodwill, net 2,926.6 2,867.3
Foreign Exchange and Other 59.3  
Goodwill, gross, Ending balance 4,852.4  
CCS [Member]    
Goodwill [Line Items]    
Goodwill, gross, Beginning balance 2,312.5 2,258.3
Accumulated Impairment Losses (150.6) (150.6)
Goodwill, net 2,161.9 2,107.7
Foreign Exchange and Other 54.2  
Goodwill, gross, Ending balance 2,312.5  
Ruckus [Member]    
Goodwill [Line Items]    
Goodwill, gross, Beginning balance [1] 537.1 534.7
Accumulated Impairment Losses [1] (41.2) (41.2)
Goodwill, net [1] 495.9 493.5
Foreign Exchange and Other [1] 2.4  
Goodwill, gross, Ending balance [1] 537.1  
ANS [Member]    
Goodwill [Line Items]    
Goodwill, gross, Beginning balance 2,002.8 2,000.1
Accumulated Impairment Losses (1,734.0) (1,734.0)
Goodwill, net 268.8 $ 266.1
Foreign Exchange and Other 2.7  
Goodwill, gross, Ending balance $ 2,002.8  
[1] Includes balances of the OneCell business for periods prior to its disposition.