v3.26.1
Investments (Equity Method Investments) (Details) - USD ($)
$ in Millions
3 Months Ended 6 Months Ended
Jun. 30, 2026
Jun. 30, 2025
Jun. 30, 2026
Jun. 30, 2025
Schedule of Equity Method Investments [Line Items]        
Equity method investment $ (289.9) $ (264.6) $ (311.6) $ (412.6)
VMO2 JV        
Schedule of Equity Method Investments [Line Items]        
Equity method investment (208.0) (161.1) (224.6) (247.7)
VodafoneZiggo JV        
Schedule of Equity Method Investments [Line Items]        
Equity method investment $ (45.7) (48.1) $ (38.9) (70.7)
Percent of interest income earned on loan included in investment 100.00%   100.00%  
nexfibre JV        
Schedule of Equity Method Investments [Line Items]        
Equity method investment $ (22.3) (29.6) $ (27.4) (42.2)
AtlasEdge JV        
Schedule of Equity Method Investments [Line Items]        
Equity method investment (12.5) (18.5) (18.1) (34.5)
Other, net        
Schedule of Equity Method Investments [Line Items]        
Equity method investment $ (1.4) $ (7.3) $ (2.6) $ (17.5)