Debt (Vendor Financing Obligations) (Schedule) (Details) - USD ($) $ in Millions	Mar. 31, 2025	Dec. 31, 2024	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument [Line Items]
2025 (remainder of year)	$ 889.1
2026	1,104.4
Total debt maturities	9,404.4	$ 9,145.0
Telenet
Debt Instrument [Line Items]
2025 (remainder of year)	567.6
2026	65.2
Total debt maturities	7,070.7
Other
Debt Instrument [Line Items]
2025 (remainder of year)	321.5
2026	1,039.2
Total debt maturities	1,360.7
Vendor financing
Debt Instrument [Line Items]
2025 (remainder of year)	328.3
2026	42.2
Total debt maturities	370.5	$ 355.9	$ 389.0	$ 399.1
Vendor financing | Telenet
Debt Instrument [Line Items]
2025 (remainder of year)	327.7
2026	42.2
Total debt maturities	369.9
Vendor financing | Other
Debt Instrument [Line Items]
2025 (remainder of year)	0.6
2026	0.0
Total debt maturities	$ 0.6