v3.26.1
Segment Reporting (Intersegment Expenses) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Segment Reporting [Line Items]        
Programming and other direct costs of services: $ 375.4 $ 465.3 $ 802.0 $ 868.7
Operating expenses: 1,169.0 1,239.5 2,419.8 2,350.0
VMO2 JV        
Segment Reporting [Line Items]        
Programming and other direct costs of services: 901.6 1,021.3 1,842.6 2,012.8
Operating expenses: 1,138.4 1,179.9 2,328.0 2,241.3
VodafoneZiggo JV        
Segment Reporting [Line Items]        
Programming and other direct costs of services: 240.9 226.4 485.1 445.7
Operating expenses: 422.7 400.2 845.0 769.8
Telenet        
Segment Reporting [Line Items]        
Programming and other direct costs of services: 309.5 349.8 629.6 702.5
Operating expenses: 246.6 250.2 502.0 484.9
Wyre        
Segment Reporting [Line Items]        
Programming and other direct costs of services: 1.7 1.7 3.4 3.3
Operating expenses: 54.5 40.4 97.4 73.8
VM Ireland        
Segment Reporting [Line Items]        
Programming and other direct costs of services: 31.2 32.5 68.4 66.6
Operating expenses: $ 50.8 $ 48.9 $ 102.2 $ 93.4