Debt (Maturities of Debt) (Details) - USD ($) $ in Millions	Sep. 30, 2023	Dec. 31, 2022
Debt Instrument [Line Items]
2023 (remainder of year)	$ 155.5
2024	491.7
2025	337.3
2026	1,898.4
2027	22.6
2028	5,069.7
Thereafter	7,314.7
Total debt	15,289.9	$ 13,370.2
Deferred financing costs, discounts and premiums, net	(154.4)
Total debt	15,135.5
Current portion	621.6
Long-term portion	14,513.9
Vodafone Collar Loan
Debt Instrument [Line Items]
Total debt	1,330.7	$ 0.0
UPC Holding
Debt Instrument [Line Items]
2023 (remainder of year)	43.0
2024	191.4
2025	0.0
2026	0.0
2027	0.0
2028	1,152.4
Thereafter	4,877.1
Total debt	6,263.9
Deferred financing costs, discounts and premiums, net	(22.4)
Total debt	6,241.5
Current portion	234.4
Long-term portion	6,007.1
Telenet
Debt Instrument [Line Items]
2023 (remainder of year)	100.8
2024	285.2
2025	22.2
2026	22.3
2027	22.6
2028	3,917.3
Thereafter	1,485.6
Total debt	5,856.0
Deferred financing costs, discounts and premiums, net	(9.8)
Total debt	5,846.2
Current portion	368.3
Long-term portion	5,477.9
VM Ireland
Debt Instrument [Line Items]
2023 (remainder of year)	0.0
2024	0.0
2025	0.0
2026	0.0
2027	0.0
2028	0.0
Thereafter	952.0
Total debt	952.0
Deferred financing costs, discounts and premiums, net	(5.2)
Total debt	946.8
Current portion	0.0
Long-term portion	946.8
Other
Debt Instrument [Line Items]
2023 (remainder of year)	11.7
2024	15.1
2025	315.1
2026	1,876.1
2027	0.0
2028	0.0
Thereafter	0.0
Total debt	2,218.0
Deferred financing costs, discounts and premiums, net	(117.0)
Total debt	2,101.0
Current portion	18.9
Long-term portion	$ 2,082.1