v3.25.2
Investments (Result of Operations) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2025
Mar. 31, 2025
Jun. 30, 2024
Mar. 31, 2024
Jun. 30, 2025
Jun. 30, 2024
Schedule of Equity Method Investments [Line Items]            
Revenue $ 1,269.1   $ 1,057.9   $ 2,440.3 $ 2,149.2
Earnings (loss) before income taxes (2,772.9)   352.3   (4,166.2) 1,029.6
Net earnings (loss) (2,773.8) $ (1,323.3) 275.2 $ 527.0 (4,097.1) 802.2
VodafoneZiggo JV            
Schedule of Equity Method Investments [Line Items]            
Revenue 1,123.3   1,091.6   2,175.3 2,205.6
Operating Segments | VodafoneZiggo JV            
Schedule of Equity Method Investments [Line Items]            
Revenue 1,123.3   1,091.6   2,175.3 2,205.6
VMO2 JV            
Schedule of Equity Method Investments [Line Items]            
Revenue 3,373.5   3,375.4   6,499.8 6,658.2
Earnings (loss) before income taxes (403.9)   27.1   (616.1) 70.1
Net earnings (loss) (308.9)   12.6   (474.7) 35.3
Equity Method Investment, Nonconsolidated Investee or Group of Investees            
Schedule of Equity Method Investments [Line Items]            
Revenue 1,123.3   1,091.6   2,175.3 2,205.6
Earnings (loss) before income taxes (157.6)   (10.0)   (246.6) (35.5)
Net earnings (loss) $ (119.9)   $ (15.4)   $ (190.4) $ (29.0)