v3.26.3
Divestitures - Additional Information (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
Dec. 17, 2024
Disposal Group, Including Discontinued Operations [Line Items]                  
Write-off of debt issuance cost             $ 101.3    
Loss on extinguishment of debt             11.3    
Convertible of stock price, percentage     100.00%            
Convertible Preferred Stock redeemed     $ 1,300.0            
Gain (loss) on disposal, net of income taxes             8,265.7 $ 869.0  
Transition service agreement income         $ 7.6 $ 8.6 9.2 27.6  
Transition service agreement incurred costs         1.0   $ 8.9    
2029 Term Loan | Revolving Credit Agreement [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Aggregate principal amount outstanding                 $ 3,150.0
2029 Term Loan | Term Loan Credit Agreement                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Aggregate principal amount outstanding                 $ 750.0
2029 Secured Notes                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Aggregate principal amount outstanding     951.0            
2028 Notes                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Aggregate principal amount outstanding     641.6            
8.25% 2027 Notes                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Aggregate principal amount outstanding     $ 866.9            
Interest rate     8.25%            
5.00% 2027 Notes                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Aggregate principal amount outstanding     $ 1,000.0            
Interest rate     5.00%            
2031 Secured Notes                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Aggregate principal amount outstanding     $ 750.0            
Outdoor Wireless Networks (OWN) Segment and Distributed Antenna Systems (DAS) Business Unit | Discontinued Operations, Disposed of by Sale [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Net cash consideration       $ 2,000.0          
Transaction expenses       9.1          
Cash and cash equivalents       83.2          
Gain (loss) on disposal, net of income taxes       $ 492.6          
Ruckus [Member] | Discontinued Operations, Disposed of by Sale [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Net cash consideration   $ 1,853.4              
Transaction expenses $ 16.2 (16.2)              
Cash and cash equivalents   38.0              
Gain (loss) on disposal, net of income taxes [1]   $ 1,145.9              
Vantiva [Member] | Discontinued Operations, Disposed of by Sale [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Transition service agreement income           0.2   2.3  
Vantiva [Member] | Discontinued Operations, Disposed of by Sale [Member] | Initial Shares Purchased [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Noncash or Part Noncash Acquisition, Interest Acquired             24.73%    
Amphenol [Member] | Discontinued Operations, Disposed of by Sale [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Net cash consideration     10,500.0            
Transaction expenses     81.3            
Cash and cash equivalents     $ 204.4            
Gain (loss) on disposal, net of income taxes             $ 5,200.0    
Transition service agreement income         0.2 8.4 1.8 25.3  
Amphenol [Member] | Outdoor Wireless Networks (OWN) Segment and Distributed Antenna Systems (DAS) Business Unit | Discontinued Operations, Disposed of by Sale [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Net revenues         (0.2) $ 0.9 (0.7) $ 4.9  
Belden Inc. [Member] | Discontinued Operations, Disposed of by Sale [Member]                  
Disposal Group, Including Discontinued Operations [Line Items]                  
Transition service agreement income         $ 7.4   $ 7.4    
[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.