v3.26.1
Discontinued Operations - Additional Information (Detail) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jan. 09, 2026
Jan. 31, 2025
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Apr. 29, 2026
Dec. 17, 2024
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, 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         7,009.3 $ 869.2    
Transition service agreement income     $ 0.5 $ 10.3 1.6 19.0    
Transition service agreement incurred costs     3.9   7.9      
2029 Term Loan | Revolving Credit Agreement [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Aggregate principal amount outstanding               $ 3,150.0
2029 Term Loan | Term Loan Credit Agreement                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Aggregate principal amount outstanding               $ 750.0
2029 Secured Notes                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Aggregate principal amount outstanding 951.0              
2028 Notes                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Aggregate principal amount outstanding 641.6              
8.25% 2027 Notes                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Aggregate principal amount outstanding $ 866.9              
Interest rate 8.25%              
5.00% 2027 Notes                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Aggregate principal amount outstanding $ 1,000.0              
Interest rate 5.00%              
2031 Secured Notes                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, 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]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Net cash consideration   $ 2,000.0            
Transaction expenses   9.1            
Disposal Group, Including Discontinued Operation, Consideration   2,000.0            
Cash and cash equivalents   83.2            
Gain (loss) on disposal, net of income taxes   $ 491.3            
Vantiva [Member] | Discontinued Operations, Disposed of by Sale [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Transition service agreement income       0.5   2.1    
Amphenol [Member] | Discontinued Operations, Disposed of by Sale [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Net cash consideration 10,500.0              
Transaction expenses 81.3              
Disposal Group, Including Discontinued Operation, Consideration 10,500.0              
Cash and cash equivalents $ 204.4              
Gain (loss) on disposal, net of income taxes         5,400.0      
Transition service agreement income     0.5 9.8 1.6 16.9    
Amphenol [Member] | Outdoor Wireless Networks (OWN) Segment and Distributed Antenna Systems (DAS) Business Unit | Discontinued Operations, Disposed of by Sale [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Net revenues     $ (0.3) $ 2.4 $ (0.5) $ 4.0    
Belden Inc. [Member] | Ruckus [Member]                
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                
Net cash consideration             $ 1,846.0  
Disposal Group, Including Discontinued Operation, Consideration             $ 1,846.0