v3.26.3
Divestitures - Summary of Gain (Loss) on Disposal of OWN Segment and DAS Business Unit and Home business (Detail) - USD ($)
$ in Millions
 3 Months Ended 9 Months Ended
Jul. 07, 2026
Jul. 01, 2026
Jan. 09, 2026
Jan. 31, 2025
Sep. 30, 2026
Sep. 30, 2025
Sep. 30, 2026
Sep. 30, 2025
Disposal Group, Including Discontinued Operations [Line Items]                
Gain on disposal, net of income taxes             $ 8,265.7 $ 869.0
Discontinued Operations, Disposed of by Sale [Member]                
Disposal Group, Including Discontinued Operations [Line Items]                
Gain on disposal before income taxes         $ 1,256.3 $ (0.2) 8,265.7 869.0
Discontinued Operations, Disposed of by Sale [Member] | C C S [Member]                
Disposal Group, Including Discontinued Operations [Line Items]                
Cash consideration received (net of cash acquired) [1]     $ 10,540.2          
Transaction expense     (81.3)          
Total disposal consideration     10,458.9          
Carrying value of net assets sold [1]     (3,326.4)          
Gain on disposal before income taxes and reclassification of foreign currency translation and other     7,132.5          
Reclassification of foreign currency translation and other [2]     (126.4)          
Gain on disposal before income taxes     7,006.1   (2.3) 0.0 7,006.1 0.0
Income tax expense [1]     (1,819.2)          
Gain on disposal, net of income taxes [1]     $ 5,186.9          
Discontinued Operations, Disposed of by Sale [Member] | OWN Segment and DAS Business Unit [Member]                
Disposal Group, Including Discontinued Operations [Line Items]                
Cash consideration received (net of cash acquired) [1]       $ 2,034.5        
Transaction expense       (9.1)        
Total disposal consideration       2,025.4        
Carrying value of net assets sold [1]       (1,057.5)        
Gain on disposal before income taxes and reclassification of foreign currency translation and other       967.9        
Reclassification of foreign currency translation and other [2]       (97.9)        
Gain on disposal before income taxes       870.0        
Income tax expense [1]       (377.4)        
Gain on disposal, net of income taxes [1]       $ 492.6        
Discontinued Operations, Disposed of by Sale [Member] | Ruckus [Member]                
Disposal Group, Including Discontinued Operations [Line Items]                
Cash consideration received (net of cash acquired) [1]   $ 1,869.6            
Transaction expense $ 16.2 (16.2)            
Total disposal consideration   1,853.4            
Carrying value of net assets sold [1]   (594.2)            
Gain on disposal before income taxes and reclassification of foreign currency translation and other   1,259.2            
Reclassification of foreign currency translation and other [2]   (0.6)            
Gain on disposal before income taxes   1,258.6     $ 1,258.6 $ 0.0 $ 1,258.6 $ 0.0
Income tax expense [1]   (112.7)            
Gain on disposal, net of income taxes [1]   $ 1,145.9            
[1] During the three and nine months ended September 30, 2026, cash consideration was reduced by $1.5 million as the Company finalized the consideration for the CCS divestiture and recorded working capital and other asset adjustments totaling $0.7 million to the carrying value of net assets sold for certain assets transferred in the transaction. During the nine months ended September 30, 2026, the Company recorded a $1.0 million adjustment to the carrying value of the OWN/DAS disposal group, along with the related tax effects, which impacted the gain on disposal recognized in discontinued operations. During the three and nine months ended September 30, 2026, the Company recorded $165.9 million of additional tax expense associated with the gain on the CCS sale. With the RUCKUS sale closing in the third quarter of 2026, the utilization of certain tax attributes were adjusted between the CCS and RUCKUS transactions.
[2] Includes the reclassifications of foreign currency translation, defined benefit plan activity and hedging instrument amounts from accumulated other comprehensive income (loss) on the Condensed Consolidated Balance Sheets related to each of the divestitures.