v3.26.1
Segment Reporting (Capital Expenditures of Reportable Segments) (Details) - USD ($)
$ in Millions
 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]    
Total consolidated property and equipment additions $ 792.6 $ 610.8
Assets acquired under capital-related vendor financing arrangements (36.1) (32.1)
Assets acquired under finance leases (1.3) 0.0
Changes in current liabilities related to capital expenditures (9.7) (16.1)
Total capital expenditures, net 745.5 562.6
VMO2 JV And VodafoneZiggo JV    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 1,689.5 1,702.2
Operating Segments | Consolidated reportable segments    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 2,409.9 2,316.5
Operating Segments | Telenet    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 226.5 268.5
Operating Segments | Wyre    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 409.5 247.5
Operating Segments | VM Ireland    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 84.4 98.3
Operating Segments | VMO2 JV (nonconsolidated)    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 1,183.3 1,267.1
Operating Segments | VodafoneZiggo JV (nonconsolidated)    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 506.2 435.1
Central and other    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions 92.4 16.5
Intersegment    
Segment Reporting [Line Items]    
Total consolidated property and equipment additions $ (20.2) $ (20.0)